WO2023273545A1

WO2023273545A1 - Sound production unit, loudspeaker assembly, and electronic device

Info

Publication number: WO2023273545A1
Application number: PCT/CN2022/088365
Authority: WO
Inventors: 于龙欣
Original assignee: 歌尔股份有限公司
Priority date: 2021-06-29
Filing date: 2022-04-22
Publication date: 2023-01-05
Also published as: CN113473334A; CN113473334B

Abstract

Disclosed are a sound production unit, a loudspeaker assembly, and an electronic device. The sound production unit comprises a diaphragm and an accommodating cavity shell; the diaphragm is used for dividing the internal space of a housing into a front acoustic cavity and a rear acoustic cavity; the accommodating cavity shell is provided on the diaphragm; a resonant cavity acoustically isolated from the rear acoustic cavity is formed in the accommodating cavity shell; and a through hole communicated with the front acoustic cavity and the resonant cavity is formed in the shell wall of the accommodating cavity shell. According to the technical solution of the present invention, the sound production unit realizes the function of filtering high-frequency noise, the sound production unit has a resonant cavity structure for filtration of high-frequency noise by only improving the structure of the sound production unit without specially improving loudspeaker assemblies having different appearance structures, and the sound production unit is applicable to loudspeaker assemblies having different appearance structures, thereby achieving effects of high universality and simplifying the manufacturing process.

Description

Sound drivers, loudspeaker components and electronics

technical field

The invention relates to the technical field of acoustics, in particular to a sounding unit, a loudspeaker assembly and electronic equipment.

Background technique

With the development of science and technology, people have higher and higher requirements for the audio quality of electronic equipment. As a common electro-acoustic transducer device that converts electrical energy into sound energy, the sound quality is one of the important indicators to measure the quality of the speaker. The sound quality The quality of the electronic equipment affects the performance of the product.

In related technologies, in order to pursue better sound quality and performance of the whole machine, a resonant cavity is usually formed in the structure of the speaker module of the product to reduce the high frequency response, but the structure and shape of the speaker module of different products will be different. For loudspeaker modules with different shapes and structures, different resonant cavity designs need to be targeted, resulting in technical problems of complex manufacturing process and poor versatility.

Contents of the invention

The main purpose of the present invention is to propose a sounding unit, aiming at solving the technical problems of complicated manufacturing process and poor versatility of the loudspeaker assembly provided with a resonant cavity in the prior art.

In order to achieve the above object, the sounding monomer proposed by the present invention includes:

a diaphragm for separating the interior space of the housing into a front acoustic cavity and a rear acoustic cavity; and

A cavity shell, the cavity shell is arranged on the diaphragm, a resonant cavity is formed in the cavity shell to be acoustically isolated from the rear acoustic cavity, and the shell wall of the cavity shell is provided with a through holes of the resonator.

In an embodiment of the present invention, the resonant cavity is located on a side of the diaphragm facing away from the front acoustic cavity, and the through hole is provided on a shell wall of the cavity shell on a side close to the front acoustic cavity.

In an embodiment of the present invention, the chamber housing includes:

a bottom case, the bottom case is arranged on the side of the diaphragm facing away from the front acoustic cavity; and

An upper cover, the upper cover is connected to the diaphragm, and covers the bottom case to form the resonant cavity surrounded by the bottom case; the through hole is arranged on the upper cover.

In an embodiment of the present invention, the bottom case and the diaphragm are integrated; and/or, the upper cover and the diaphragm are integrated.

In an embodiment of the present invention, the bottom of the bottom case is provided with an elastic supporting member.

In an embodiment of the present invention, the upper cover is a PET cover; and/or, the upper cover is made of heat dissipation material; and/or, the bottom case is made of heat dissipation material.

In an embodiment of the present invention, the diaphragm includes a dome and a peripheral connecting portion disposed on the outer periphery of the dome, and the cavity shell is disposed on the dome.

In an embodiment of the present invention, the sounding unit further includes:

base;

a magnetic circuit assembly, the magnetic circuit assembly is arranged on the base; and

A voice coil, the voice coil is arranged in the magnetic field of the magnetic circuit assembly, and the voice coil is connected with the dome.

In an embodiment of the present invention, the magnetic circuit assembly includes:

a magnet unit, the magnet unit is arranged on the base, the magnet unit includes an inner magnet and an outer magnet arranged outside the inner magnet, a magnetic field is formed between the inner magnet and the outer magnet; and

A washer unit, the washer unit includes a central washer arranged on the inner magnet and a peripheral washer arranged on the outer magnet;

The voice coil is arranged in the magnetic field between the inner magnet and the outer magnet, the inner magnet is arranged opposite to the dome, and the outer magnet is arranged opposite to the peripheral connecting portion.

In an embodiment of the present invention, an escape groove is provided at a position of the inner magnet corresponding to the cavity shell; an escape hole is provided at a position of the center washer corresponding to the cavity shell.

In an embodiment of the present invention, the through hole is covered with a breathable mesh cloth, and the sound resistance range of the breathable mesh cloth is 0-10000 MKS Rayls.

In an embodiment of the present invention, the number of the cavity shells is at least two.

In an embodiment of the present invention, the number of the through holes on one cavity shell is at least two.

In an embodiment of the present invention, sound-absorbing cotton and/or sound-absorbing particles are arranged in the cavity of the resonant cavity.

In an embodiment of the present invention, the shell wall of the cavity shell is made of flexible material.

In order to achieve the above object, the present invention also provides a loudspeaker assembly, including a casing and the above-mentioned sounding unit; It is divided into a front acoustic cavity and a rear acoustic cavity, and the shell is provided with a sound outlet connecting the front acoustic cavity with the outside world.

To achieve the above purpose, the present invention also provides an electronic device, comprising the above speaker assembly. The loudspeaker assembly includes a casing and the above-mentioned sounding monomer; the sounding monomer is arranged in the casing, and the diaphragm of the sounding monomer separates the inner space of the casing into a front sound cavity and a rear sound cavity, and the casing There is a sound hole connecting the front sound cavity with the outside world.

In the technical solution of the present invention, a sounding unit is provided with a cavity shell on the diaphragm, and a resonant cavity is formed in the cavity shell, and a through hole communicating with the resonant cavity is opened on the wall of the cavity shell. When the sounding unit is used in a loudspeaker When in the housing of the component, the diaphragm divides the inner space of the housing into a front acoustic cavity and a rear acoustic cavity. By acoustically isolating the resonant cavity from the rear acoustic cavity, and at the same time connecting the resonant cavity to the front acoustic cavity through a through hole, the through hole and the resonant cavity form a Helmholtz resonator, so that the air inside the front acoustic cavity can enter the resonance cavity through the through hole to realize resonance filtering, and realize the filtering function of high-frequency noise. In this embodiment, only by improving the structure of the sounding unit, the sounding unit has a resonant cavity structure for filtering high-frequency noise, without the need to specifically improve speaker assemblies with different shapes and structures, and can be applied to many different The loudspeaker assembly with the shape structure achieves the effects of strong versatility and simplified manufacturing process.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is a structural schematic diagram of an embodiment of the sounding unit of the present invention;

Fig. 2 is a schematic diagram of a full section of the sounding unit of the embodiment in Fig. 1;

Fig. 3 is a schematic diagram of the explosion structure of the sounding unit of the embodiment in Fig. 1;

Fig. 4 is a structural schematic diagram of another embodiment of the sounding unit of the present invention;

Fig. 5 is a schematic diagram of a full section of the sounding unit of the embodiment in Fig. 4;

Fig. 6 is a schematic diagram of the explosion structure of the sound emitting unit of the embodiment in Fig. 5 .

Explanation of reference numbers:

标号label	名称 name	标号label		名称name
100100	振膜 Diaphragm	300300	底座 base
110110	球顶 ball top	410410	磁铁单元 magnet unit
120120	外围连接部 Peripheral connection	411411	内磁铁 inner magnet
200200	容腔壳 Chamber shell	411a 411a		避让槽avoidance slot
201201	谐振腔 resonant cavity	412412	外磁铁 outer magnet
210210	底壳 Bottom case	420420	华司单元 Washer unit
220220	上盖 cover	421421	中心华司 Center washer
221221	通孔through hole	421a 421a		避让孔avoidance hole
230230	弹性支撑件 elastic support	422422	外围华司 Peripheral washer
500500	音圈 voice coil	600600	支架bracket

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

The present invention proposes a sounding unit, which aims to realize the function of the sounding unit with its own resonant cavity 201 by setting a resonant cavity 201 on the diaphragm 100 of the sounding unit, so that when the sounding unit is applied to different speaker components At this time, the resonant cavity 201 will not be affected by the structural shape of the loudspeaker component shell, and the filter function of the front cavity resonant cavity can be realized, which is conducive to improving the sharp noise such as high-frequency vocal lip-tooth sound, and improving the effect of hearing of the whole machine. It should be noted that the sound unit of the present invention can be applied to any type of speaker assembly, and is not limited to a specific type.

In the embodiment of the present invention, as shown in FIG. 1 to FIG. 6 , the sounding unit is arranged in the housing (not shown) of the speaker assembly; the sounding unit includes a diaphragm 100 and a cavity shell 200 .

The diaphragm 100 is used to divide the inner space of the housing into a front acoustic cavity and a rear acoustic cavity;

The cavity shell 200 is arranged on the diaphragm 100 , and a resonant cavity 201 is formed in the cavity shell 200 to be acoustically isolated from the rear acoustic cavity.

The sounding unit vibrates the air through the diaphragm 100 to produce sound. When the sounding unit is installed in the housing of the speaker assembly, the diaphragm 100 separates the inner space of the housing into a front acoustic cavity and a rear acoustic cavity. The rear acoustic cavity is used to ensure low-frequency sound effects, and the front acoustic cavity It is used to ensure the high-frequency sound effect, and communicates with the sound hole of the shell through the front sound cavity, so that the sound can be transmitted smoothly. The diaphragm 100 is provided with a cavity shell 200, and a resonant cavity 201 is formed in the cavity shell 200. The resonant cavity 201 is isolated from the rear acoustic cavity, and at the same time, the resonant cavity 201 is connected to the front cavity through the through hole 221 on the wall of the cavity shell 200. The sound cavity is connected, so that the sound in the front cavity can enter the resonant cavity 201 through the through hole 221 to realize high-frequency noise filtering, which greatly improves the sharp noise such as high-frequency vocal lip-tooth sound, and improves the sound quality performance of the speaker assembly.

It can be understood that the cavity shell 200 is arranged on the diaphragm 100, and communicates with the front acoustic cavity through the through hole 221, and the cavity shell 200 cooperates with the through hole 221 to form a Helmholtz resonator, so that the air in the front acoustic cavity The through hole 221 enters the cavity shell 200 to resonate, thereby eliminating at least part of the high-frequency noise, realizing the filtering function of the front acoustic cavity, and improving the sound quality.

In practical application, the installation position of the cavity shell 200 can be determined according to the actual situation, as long as the cavity shell 200 can form Helmholtz resonance with the through hole 221 communicating with the front acoustic cavity. For example, the cavity shell 200 can be set on the side of the diaphragm 100 facing the front acoustic cavity, at this time the through hole 221 can be set on the top wall or the side wall of the cavity shell 200 (the front acoustic cavity is located above the diaphragm 100 as an example); For example, the cavity shell 200 can be arranged on the side of the diaphragm 100 away from the front acoustic cavity, that is, the cavity shell 200 is located under the diaphragm 100, and the through hole 221 can be arranged on the top wall of the cavity shell 200; The shell 200 is set through the diaphragm 100. At this time, the diaphragm 100 is surrounded and connected to the shell side wall of the cavity shell 200. The through hole 221 can be set on the shell top wall of the cavity shell 200 or a part of the shell side in the front acoustic cavity. on the wall. Its specific setting position is not limited here. Based on the above-mentioned several embodiments, the position of the cavity shell 200 on the extension plane of the diaphragm 100 may not be limited, for example, it may be arranged in the central area 110 of the diaphragm 100 Or the peripheral area 120 and the like.

In the actual application process, the connection mode between the cavity shell 200 and the diaphragm 100 can also be determined according to the actual situation. For example, the cavity shell 200 and the diaphragm 100 can be in an integral structure or a separate structure. The cavity shell 200 and the diaphragm 100 are made of the same flexible material, so that the cavity wall of the resonator 201 can change in real time according to the vibration of the diaphragm 100 to adjust the high-frequency filtering effect, and can be manufactured by integral injection molding. When it is a split structure, the cavity shell 200 can be partially connected to the diaphragm 100 separately, and the diaphragm 100 can form the bottom shell or the upper cover of the cavity shell 200 at this time; it can also be the entire cavity shell 200 Separately connected with the vibrating membrane 100, at this time, the two can be fixedly connected by bonding after molding separately. The specific connection manner is not limited here.

Optionally, the shape and structure of the cavity shell 200 can be spherical, cubic, columnar or other special shapes, etc., and its specific shape and structure can be determined according to the actual situation, as long as it can form a resonator with the through hole 221 . The shape of the through hole 221 does not need to be limited, and the shape of the through hole 221 can be a square hole, a round hole, a conical hole, or a slit.

It should be noted that the cavity shell 200 in this embodiment is arranged on the diaphragm 100 of the sounding unit, and the cavity shell 200 cooperates with the through hole 221 to form a channel for filtering high-frequency noise in the front acoustic cavity. The resonant structure, the setting position of the cavity shell 200 and the connection method with the diaphragm 100 are all determined inside the sounding unit according to the improvement of the structure of the sounding unit itself, which is consistent with the structure of the shell of the loudspeaker assembly where the sounding unit is installed. The shape has little to do with it, so it can be applied to loudspeaker components with different shapes and structures to reduce noise and improve sound quality.

In the technical solution of the present invention, a sounding unit is provided with a cavity shell 200 on the diaphragm 100, a resonant cavity 201 is formed in the cavity shell 200, and a through hole 221 communicating with the resonant cavity 201 is opened on the shell wall of the cavity shell 200. When the sounding monomer is applied in the housing of the loudspeaker assembly, the diaphragm 100 separates the inner space of the housing into a front acoustic cavity and a rear acoustic cavity, by acoustically isolating the resonant cavity 201 from the rear acoustic cavity, and communicating with the front acoustic cavity through the through hole 221, The through hole 221 and the resonant cavity 201 form a Helmholtz resonator, so that the air inside the front acoustic cavity can enter the resonant cavity 201 through the through hole 221 to realize resonance filtering and realize the filtering function of high-frequency noise. In this embodiment, only by improving the structure of the sounding unit, the sounding unit has a resonant cavity structure for filtering high-frequency noise, without the need to specifically improve speaker assemblies with different shapes and structures, and can be applied to many different In the loudspeaker assembly of the shape structure, the effects of strong versatility and simplified manufacturing process are achieved.

In one embodiment of the present invention, referring to FIG. 1 , FIG. 2 , FIG. 4 and FIG. 5 , the resonant cavity 201 is located on the side of the diaphragm 100 away from the front acoustic cavity, and the through hole 221 is provided on the side of the cavity shell 200 close to the front acoustic cavity. shell wall.

In this embodiment, when the sounding unit is installed in the shell of the speaker assembly, the magnetic circuit components and support components inside the sounding unit are located on the side of the diaphragm 100 away from the front acoustic cavity, that is, most of the structure of the sounding unit The layout is located in the rear acoustic cavity. By setting the resonant cavity 201 on the side of the diaphragm 100 away from the front acoustic cavity, the cavity shell 200 is accommodated in the interior of the sound emitting unit without occupying the space of the front acoustic cavity, which improves the sound output of the unit. Integrity of the overall appearance and structure of the body, but also makes the internal structural layout of the sounding unit more compact, reducing the appearance volume of the sounding unit.

It can be understood that the cavity shell 200 is arranged inside the sounding unit without affecting the appearance of the sounding unit, so that the structure of the resonant cavity can be realized without changing the appearance and volume of the sounding unit. function. On this basis, the purpose of improving the sound quality can be achieved without changing the shell structure of the loudspeaker assembly on which the sound emitting unit is installed.

In one embodiment of the present invention, referring to Fig. 1 to Fig. 6, the cavity shell 200 includes a bottom shell 210 and an upper cover 220; the bottom shell 210 is arranged on the side of the diaphragm 100 away from the front acoustic cavity; the upper cover 220 is connected to the diaphragm 100, and cover it on the bottom case 210 to form a resonant cavity 201 surrounded by the bottom case 210; the through hole 221 is provided in the upper cover 220.

In this embodiment, by setting the cavity shell 200 as a bottom shell 210 and an upper cover 220 with an accommodating groove, a relatively closed resonance is formed by setting the upper cover 220 on the bottom shell 210 to block the accommodating groove. Cavity 201, and at the same time, by opening a through hole 221 on the upper cover 220, it is used to communicate with the resonant cavity 201 and the front acoustic cavity, so as to realize the function of the resonant cavity of the front cavity.

It can be understood that, on the basis of the foregoing embodiments, the bottom shell 210 is arranged on the side of the diaphragm 100 facing away from the front acoustic cavity, and the upper cover 200 can be arranged flush with the diaphragm 100, so as to ensure that the appearance, shape and volume of the structure remain unchanged. In this case, the function of setting a resonant cavity structure in the sounding unit is realized. In this embodiment, the upper cover 220 and the bottom shell 210 of the cavity shell 200 are provided separately, and the upper cover 220 and the bottom shell 210 can be connected by bonding to achieve the purpose of easy installation.

In practical application, the shape of the bottom case 210 can be set as a regular rectangular structure, and the upper cover 220 can be set as a rectangular plate structure accordingly, which simplifies the design of the molding die and improves the process efficiency. The material of the bottom case 210 and the upper cover 220 may be the same or different, and may be the same as or different from the diaphragm 100 . In this embodiment, in order to further improve the sound quality, the bottom shell 210 and/or the upper cover 220 can be made of flexible materials, so that the cavity of the resonant cavity 201 can be changed according to the vibration of the air in the front acoustic cavity, so as to respond to the changing The sound undergoes more accurate noise filtering.

In one embodiment, referring to FIG. 1 to FIG. 3 , the bottom case 210 and the diaphragm 100 are integrally structured. At this time, the bottom case 210 can be formed with the diaphragm 100 concave toward the side facing away from the front acoustic cavity, and the upper cover 220 and the diaphragm The membrane 100 is connected and covered on the top of the bottom case 210 to enclose and form the resonant cavity 201 . Optionally, the upper cover 220 may adopt a PET (Polyethylene terephthalate, polyethylene terephthalate) cover plate, and the through hole 221 is arranged on the PET cover plate. Furthermore, the upper cover 220 can be made of heat-dissipating materials, so as to speed up the heat dissipation of the sounding unit and improve the performance of the whole machine.

In an embodiment, referring to FIG. 4 to FIG. 6 , the upper cover 220 and the diaphragm 100 are integrally structured. It can be understood that the diaphragm 100 is formed as the upper cover 220 part of the cavity shell 200, a through hole 221 is opened on the diaphragm 100, and a bottom case 210 is provided under the diaphragm 100 to pass through the bottom case 210 and the diaphragm 100. The enclosure forms a resonant cavity 201 . Optionally, the bottom shell 210 is connected to the side of the diaphragm 100 away from the front acoustic cavity by means of adhesion. Optionally, the bottom case 210 can also be made of PET (Polyethylene terephthalate, polyethylene terephthalate material. Further, the bottom case 210 can be made of a heat dissipation material to speed up the heat dissipation of the sounding monomer and improve Machine performance.

In an embodiment of the present invention, referring to FIG. 2 , FIG. 3 , FIG. 5 and FIG. 6 , the diaphragm 100 includes a dome 110 and a peripheral connection portion 120 disposed on the outer periphery of the dome 110 , and the cavity shell 200 is disposed on the dome 110 .

It can be understood that the dome 110 is located in the middle area of the diaphragm 100, and it is connected to the fixed part inside the sounding unit through the peripheral connection part 120. The periphery of the dome is connected and supported, so that the dome 110 is suspended in the air, so as to vibrate smoothly and produce sound. In summary of this embodiment, the cavity shell 200 is arranged on the dome 110 so that the resonant cavity 210 is located in the middle of the diaphragm 100 and vibrates together with the dome 110 to further improve the high-frequency noise filtering effect.

When the cavity shell 200 is set on the dome 110 of the diaphragm 100, the dome 110 can be concave or convex to form the bottom shell 210, and the front cavity resonance can be realized by connecting the upper cover 220 with the through hole 221 on the dome 110 cavity function. Alternatively, a through hole 221 may be opened on the dome 110, and a bottom shell 210 with a receiving groove may be provided on the inside or outside of the dome 110, so as to realize the function of the front cavity resonant cavity.

In an embodiment of the present invention, referring to Fig. 2, Fig. 3, Fig. 5 and Fig. 6, the sounding unit also includes a base 300, a magnetic circuit assembly and a voice coil 500; the magnetic circuit assembly is arranged on the base 300; the voice coil 500 is arranged on In the magnetic field of the magnetic circuit assembly, the voice coil 500 is connected to the dome 110 .

It can be understood that the base 300 plays the role of support and fixation, a magnetic circuit assembly is provided on the base 300, and the voice coil 500 is arranged in the magnetic field formed by the magnetic circuit assembly, so that when a changing current is passed into the voice coil 500, it will Movement under the action of magnetic induction force will drive the diaphragm 100 to vibrate to produce sound. In one embodiment, the diaphragm 100 is connected to the voice coil 500, and the voice coil 500 has a ring structure, which separates the diaphragm 100 into a dome 110 located inside the voice coil 500 and a peripheral connection part located outside the voice coil 500 120.

In one embodiment, the magnetic circuit assembly includes a magnet unit 410 and a Washer unit 420; the magnet unit 410 is arranged on the base 300; the magnet unit 410 includes an inner magnet 411 and an outer magnet 412 arranged outside the inner magnet 411, and the inner magnet 411 and A magnetic field is formed between the outer magnets 412; the washer unit 420 includes a central washer 421 arranged on the inner magnet 411 and a peripheral washer 422 arranged on the outer magnet 412;

The voice coil 500 is disposed in the magnetic field between the inner magnet 411 and the outer magnet 412 , the inner magnet 411 is disposed opposite to the dome 110 , and the outer magnet 412 is disposed opposite to the peripheral connecting portion 120 .

In this embodiment, the magnet unit 410 includes an inner magnet 411 and an outer magnet 412. The inner magnet 411 and the outer magnet 412 have opposite magnetic properties and are arranged at intervals to form a magnetic field between the two. The washer unit 420 is a magnetically conductive material. A central washer 421 is arranged on the inner magnet 411, and a peripheral washer 422 is arranged on the outer magnet 412 to improve the utilization rate of the magnetic field. It can be understood that the magnetic field formed between the inner magnet 411 and the outer magnet 412 is one facing the other, and the voice coil 500 is placed in the magnetic field between the inner magnet 411 and the outer magnet 412. When the current is applied, The voice coil 500 can move under the action of magnetic induction force, thereby driving the diaphragm 100 to move.

The dome 110 of the diaphragm 100 is set opposite to the inner magnet 411, and the peripheral connection part 120 is set opposite to the outer magnet 412, so the cavity shell 200 is set corresponding to the position of the inner magnet 411. In order to ensure the rationality of the structural layout, the inner magnet 411 corresponds to The cavity shell 200 is provided with an avoidance groove 411a; the central washer 421 is provided with an avoidance hole 421a corresponding to the position of the cavity shell 200, so as to make the internal structure layout of the sounding unit more compact.

In practical application, the inner magnet 411 can be arranged in a ring structure, the inner cavity of the ring structure forms an avoidance groove 411a, and the outer magnet 412 is arranged on the outer periphery of the inner magnet 411 . Correspondingly, the central washer 421 can also be set as a ring structure to match the shape of the inner magnet 411, and the inner cavity of the ring structure forms an avoidance hole 421a; the peripheral washer 422 can also be set as a ring structure, Set on the outer magnet 412 . It can be understood that a bracket 600 may be provided on the peripheral washer 422 for fixing the peripheral connection portion 120 connected to the diaphragm 100 , so as to realize the structural reliability of the diaphragm 100 .

In an embodiment of the present invention, the through hole 221 is covered with a breathable mesh cloth (not shown in the figure), and the sound resistance range of the breathable mesh cloth is 0-10000 MKS Rayls.

In this embodiment, by providing a breathable mesh cloth at the through hole 221 of the cavity shell 200 , the acoustic resistance at the through hole 221 can be adjusted, the filtering effect can be improved, and the high-frequency human voice and sound quality can be improved. Among them, the breathable mesh can be a non-equal acoustic resistance mesh, and the partial aperture of the mesh layout can be changed to adjust the local acoustic resistance through the mesh weaving process or local coating, mixed weaving of various wires, and composite of different acoustic resistance meshes to achieve According to the airflow distribution through the through holes 221, the mesh aperture size on the breathable mesh cloth can be adjusted, so that the airflow velocity through the through holes 221 is consistent, so as to avoid noise caused by uneven air distribution.

In an embodiment of the present invention, there are at least two chamber shells 200 . It can be understood that the number of Helmholtz resonators formed in the sounding monomer is at least 2, and when the number of Helmholtz resonators is greater than or equal to 2, they can be evenly distributed on the diaphragm 100, further Improve high-frequency filtering effect.

In an embodiment of the present invention, the number of through holes 221 on one chamber shell 200 is at least two. It can be understood that a resonant cavity 201 is formed in one cavity shell 200, and at least two through holes 221 are provided to achieve the purpose of improving the high-frequency filtering effect.

In an embodiment of the present invention, a sound-absorbing material is provided in the resonant cavity 201 . In this embodiment, by installing sound-absorbing cotton and/or sound-absorbing particles in the cavity of the resonant cavity 201, the cavity can be virtually enlarged, the design volume can be reduced, and the purpose of improving performance and sound quality can be achieved.

In an embodiment of the present invention, referring to FIG. 2 , FIG. 3 , FIG. 5 and FIG. 6 , the bottom of the bottom case 210 is provided with an elastic supporting member 230 . In this embodiment, considering that the cavity shell 200 is arranged on the diaphragm 100, the cavity shell 200 will vibrate together with the vibration of the diaphragm 100, and an elastic support 230 can be provided at the bottom of the bottom shell 210 to achieve improved The purpose of polarization is to reduce high-frequency resonance, and at the same time, by arranging the elastic support member 230 on the base 300 , it can realize the structural support for the cavity shell 200 and improve the reliability of the structure.

The present invention also proposes a loudspeaker assembly, which includes a casing and a sounding unit. For the specific structure of the sounding unit, refer to the above-mentioned embodiments. Since this loudspeaker assembly adopts all the technical solutions of all the above-mentioned embodiments, it has at least the above-mentioned All the beneficial effects brought by the technical solutions of the embodiments will not be repeated here. Wherein, the sound emitting unit is arranged in the casing, and the diaphragm 100 of the sound emitting unit divides the inner space of the casing into a front acoustic cavity and a rear acoustic cavity, and the casing is provided with a sound hole connecting the front acoustic cavity and the outside.

Referring to Figures 1 to 6, the sounding unit vibrates the air through the diaphragm 100 to produce sound. When the sounding unit is installed in the housing of the speaker assembly, the diaphragm 100 separates the inner space of the housing into a front acoustic cavity and a rear acoustic cavity. The rear acoustic cavity is used for To ensure the low-frequency sound effect, the front acoustic cavity is used to ensure the high-frequency sound effect, and the front acoustic cavity is connected with the sound outlet of the shell so that the sound can be transmitted smoothly. The diaphragm 100 is provided with a cavity shell 200, and a resonant cavity 201 is formed in the cavity shell 200. The resonant cavity 201 is isolated from the rear acoustic cavity, and at the same time, the resonant cavity 201 is connected to the front cavity through the through hole 221 on the wall of the cavity shell 200. The sound cavity is connected, so that the sound in the front cavity can enter the resonant cavity 201 through the through hole 221 to realize high-frequency noise filtering, which greatly improves the sharp noise such as high-frequency vocal lip-tooth sound, and improves the sound quality performance of the speaker assembly.

The present invention also proposes an electronic device, which includes a loudspeaker assembly. For the specific structure of the loudspeaker assembly, refer to the above-mentioned embodiments. Since this electronic device adopts all the technical solutions of all the above-mentioned embodiments, it has at least the technology of the above-mentioned embodiments. All beneficial effects brought by the scheme will not be repeated here. Optionally, the electronic device may be a mobile phone, a tablet computer, a speaker, and the like.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly/indirectly used in other All relevant technical fields are included in the patent protection scope of the present invention.

Claims

A sounding unit, which is applied to a speaker assembly, is characterized in that the loudspeaker assembly includes a housing, and the sounding unit is arranged in the housing; the sounding unit includes:

a diaphragm (100), the diaphragm (100) is used to separate the inner space of the housing into a front acoustic cavity and a rear acoustic cavity; and

A cavity shell (200), the cavity shell (200) is arranged on the diaphragm (100), and a resonant cavity (201) is formed in the cavity shell (200) to be acoustically isolated from the rear acoustic cavity, so The shell wall of the cavity shell (200) is provided with a through hole (221) connecting the front acoustic cavity and the resonant cavity (201).
The sounding unit according to claim 1, characterized in that, the resonant cavity (201) is located on the side of the diaphragm (100) away from the front acoustic cavity, and the through hole (221) is provided in the The cavity shell (200) is close to the shell wall on the side of the front acoustic cavity.
The sounding unit according to claim 2, characterized in that, the cavity shell (200) comprises:

a bottom case (210), the bottom case (210) is arranged on the side of the diaphragm (100) away from the front acoustic cavity; and

An upper cover (220), the upper cover (220) is connected to the diaphragm (100), and covers the bottom case (210) to form the resonant cavity ( 201), the through hole (221) is provided on the upper cover (220).
The sounding unit according to claim 3, characterized in that, the bottom case (210) and the diaphragm (100) are integrated; and/or, the upper cover (220) and the diaphragm (100) an integrated structure.
The sound emitting unit according to claim 3, characterized in that, the bottom of the bottom case (210) is provided with an elastic support (230).
The sounding unit according to claim 3, characterized in that, the upper cover (220) is a PET cover plate; and/or, the upper cover (220) is made of a heat dissipation material; and/or, the The bottom case (210) is made of heat dissipation material.
The sounding unit according to any one of claims 1 to 6, characterized in that, the diaphragm (100) comprises a dome (110) and a peripheral connecting portion (120) arranged on the outer periphery of the dome (110) ), the cavity shell (200) is arranged on the spherical top (110).
The sounding unit according to claim 7, wherein the sounding unit further comprises:

Base (300);

a magnetic circuit assembly, the magnetic circuit assembly is arranged on the base (300); and

A voice coil (500), the voice coil (500) is arranged in the magnetic field of the magnetic circuit assembly, and the voice coil (500) is connected with the dome (110).
The sounding unit according to claim 8, wherein the magnetic circuit assembly comprises:

A magnet unit (410), the magnet unit (410) is arranged on the base (300), the magnet unit (410) includes an inner magnet (411) and an outer magnet ( 412), forming a magnetic field between the inner magnet (411) and the outer magnet (412); and

A washer unit (420), the washer unit (420) includes a central washer (421) arranged on the inner magnet (411) and a peripheral washer (422) arranged on the outer magnet (412) );

The voice coil (500) is arranged in the magnetic field between the inner magnet (411) and the outer magnet (412), the inner magnet (411) is arranged opposite to the dome (110), the The outer magnet (412) is arranged opposite to the peripheral connection part (120).
The sounding unit according to claim 9, characterized in that, the position of the inner magnet (411) corresponding to the cavity shell (200) is provided with an escape groove (411a); the center washer (421) corresponds to An escape hole (421a) is provided at the position of the cavity shell (200).
The sounding unit according to any one of claims 1 to 6, wherein the through hole (221) is covered with a breathable mesh, and the sound resistance range of the breathable mesh is 0-10000MKS Rayls;

And/or, the number of the cavity shells (200) is at least 2;

And/or, the number of said through holes (221) on one said chamber shell (200) is at least 2;

And/or, sound-absorbing cotton and/or sound-absorbing particles are arranged in the cavity of the resonant cavity (201);

And/or, the shell wall of the cavity shell (200) is made of flexible material.
A loudspeaker assembly, characterized in that it comprises a casing and the sounding monomer according to any one of claims 1 to 11; the sounding monomer is arranged in the casing, and the diaphragm (100 ) divides the inner space of the housing into a front acoustic cavity and a rear acoustic cavity, and the housing is provided with a sound outlet connecting the front acoustic cavity with the outside world.
An electronic device, characterized by comprising the speaker assembly as claimed in claim 12.