Sound production unit, sound production device, and application apparatus

Abstract

Disclosed in the present invention are a sound production unit, a sound production device, and an application apparatus. The sound production unit comprises a vibration system, a magnetic circuit system, and a composite housing. The vibration system comprises a diaphragm and a voice coil connected to the diaphragm. The magnetic circuit system is located on one side of the vibration system; a magnetic gap is formed in the magnetic circuit system; the voice coil is suspended in the magnetic gap; and the diaphragm, the voice coil, and the magnetic circuit system define a mounting cavity. A sound absorption housing is accommodated in the mounting cavity; an isolation mesh is provided in the sound absorption housing; the isolation mesh divides the inner cavity of the sound absorption housing into a cavity and a sound absorption cavity that are independent of each other; the cavity is located on the side close to the diaphragm, and sound holes are formed on the side of the cavity facing the diaphragm; the sound absorption cavity is filled with sound absorption particles; and the isolation mesh is used for isolating the sound absorption particles. According to the present invention, by means of the coupling effect of the air in the cavity and the sound absorption particles in the sound absorption cavity, and the energy absorption characteristics of the sound absorption particles, the acoustic performance of the sound production unit is improved, and a miniaturization design is facilitated; in addition, no magnetic fluid needs to be injected, ensuring that the acoustic performance of the sound production device is not affected.

Description

Sounding unit, sounding device and application device Technical Field

[0001] The present invention relates to the field of electroacoustic technology, and in particular to a sound-generating unit, a sound-generating device and an application device. Background Art

[0002] Sound-generating components, such as tweeters, typically have high resonant frequencies due to their nature. Excessively high peak values ​​(Q values) degrade sound quality. Speakers have a fundamental resonance. Insufficient damping of this fundamental resonance can cause excessively high peaks in the speaker's frequency response. The speaker's overall damping can adjust the height of this resonance peak. In tweeters, however, damping is often insufficient. This is because the electromagnetic damping that drives the speaker is too weak to provide sufficient damping to smooth the frequency response.

[0003] To produce optimal sound quality, the speaker's response to specific frequencies must be manipulated. This is typically done by adding an additional resonant cavity in front of the speaker diaphragm or a rear cavity at the bottom or side of the U-iron. This approach often increases the speaker's size and volume, hindering miniaturization. Alternatively, injecting magnetic fluid into the magnetic gap can increase damping and thus reduce the resonance peak. However, this approach, because the magnetic fluid's properties are affected by temperature, the damping effect of the magnetic fluid varies with temperature fluctuations, causing the speaker's frequency response to vary with temperature fluctuations, affecting the speaker's acoustic performance.

[0004] Summary of the Invention

[0005] The main purpose of the present invention is to propose a sound-generating unit, a sound-generating device and an application device, aiming to solve the technical problem that the existing method of increasing the damping of the sound-generating device is not conducive to miniaturization design and affects the acoustic performance.

[0006] To achieve the above objectives, the present invention provides a sound-emitting unit, comprising:

[0007] a vibration system comprising a diaphragm and a voice coil connected to the diaphragm;

[0008] a magnetic circuit system, the magnetic circuit system being located on one side of the vibration system, the magnetic circuit system forming a magnetic gap, the voice coil being suspended in the magnetic gap, and the diaphragm, the voice coil, and the magnetic circuit system together forming a mounting cavity;

[0009] A sound-absorbing shell is accommodated in the installation cavity. An isolation net is provided in the sound-absorbing shell. The isolation net divides the inner cavity of the sound-absorbing shell into a cavity and a sound-absorbing cavity that are independent of each other. The cavity is located on a side close to the diaphragm, and a sound hole is formed on the side of the cavity facing the diaphragm. The sound-absorbing cavity is filled with sound-absorbing particles, and the isolation net is used to isolate the sound-absorbing particles.

[0010] Optionally, the sound-absorbing shell includes:

[0011] A cover body, wherein the sound hole is formed in the cover body, the isolation net is arranged in the cover body, and the cover body and the isolation net together form the cavity;

[0012] A shell, one side of the shell is connected to the magnetic circuit system, the cover is connected to the side of the shell facing the diaphragm, and the isolation net, the cover and the shell together form the sound absorption cavity.

[0013] Optionally, the cover body includes a top wall and a first side wall, the top wall is provided with the sound hole, the first end of the first side wall is connected to the outer periphery of the top wall, the second end of the first side wall is connected to the shell, the isolation net is located between the top wall and the shell, and the outer periphery of the isolation net is surrounded and abutted against the inner side of the first side wall, the top wall and the isolation net together form the cavity, and the isolation net, the first side wall and the shell together form the sound absorption cavity.

[0014] Optionally, a connection component connected to the isolation net is provided on the inner side of the cover body, and the connection component avoids the sound hole.

[0015] Optionally, the connection assembly includes a plurality of connection ribs, and the plurality of connection ribs are distributed at intervals along the circumference of the cover body.

[0016] Optionally, there are multiple sound holes, one of which is located in the middle of the cover body, and the other sound holes are distributed at intervals around the sound hole in the middle.

[0017] Optionally, among the remaining sound holes, a connecting rib is provided between any two adjacent sound holes.

[0018] Optionally, the connection assembly further includes a connection pipe, one end of which is connected to the top wall and communicates with the sound hole located in the middle of the cover body, and the other end of the connection pipe is connected to the isolation net.

[0019] Optionally, the cavity is arranged to gradually expand from the top wall toward the shell.

[0020] Optionally, the diaphragm forms a spherical top at a position corresponding to the top wall, and the top wall is an arched top wall that arches toward the spherical top, and the arching curvature of the top wall is consistent or substantially consistent with the curvature of the spherical top, and there is a gap between the top wall and the spherical top.

[0021] Optionally, the distance between the top wall and the spherical top is 0.5 mm to 10 mm.

[0022] Optionally, the isolation net is in an arched structure that arches toward the top wall.

[0023] Optionally, a limiting boss protruding toward one side of the sound absorbing cavity is formed on the top wall near the first side wall, and the isolation net is connected to the limiting boss.

[0024] Optionally, the shell includes a bottom wall and a second side wall, the bottom wall is connected to the magnetic circuit system, the second side wall is connected to the outer periphery of the bottom wall, and the second side wall is sleeved on the outer periphery of the first side wall; the second end of the first side wall is connected to the bottom wall, and the isolation net, the first side wall and the bottom wall together form the sound absorbing cavity.

[0025] Optionally, the ratio of the area of ​​the sound hole to the area of ​​the top wall is 0.1 to 0.5.

[0026] Optionally, the volume ratio of the sound absorbing cavity to the cavity is 1-3.

[0027] Optionally, the sound-absorbing shell has a centrally symmetrical structure.

[0028] Optionally, the magnetic circuit system includes a first magnet, a second magnet and a magnetic conductive plate, the magnetic conductive plate and the second magnet are stacked in sequence in a direction away from the diaphragm, the first magnet cover is arranged outside the magnetic conductive plate and the second magnet, and the magnetic gap is formed between the first magnet, the magnetic conductive plate and the second magnet; the diaphragm, the voice coil and the magnetic conductive plate together form the installation cavity, and the sound-absorbing shell is connected to the magnetic conductive plate.

[0029] Optionally, the sound-generating device further includes a basin and a bracket, the bracket is annular, the magnetic circuit system is installed in the bracket, the basin cover is arranged outside the vibration system and the bracket, the basin has an opening corresponding to the position of the diaphragm, and the diaphragm is connected to the basin and / or the bracket.

[0030] The present invention further provides a sound-generating device, which includes a protective shell and the sound-generating unit described above housed in the protective shell.

[0031] The present invention further provides an application device, a housing of the application device and the above-mentioned sound-generating device accommodated in the housing.

[0032] In the technical solution of the present invention, the diaphragm, voice coil, and magnetic circuit system of the sound-producing unit together form an installation cavity, within which the sound-absorbing shell can be accommodated. A separation net is provided within the sound-absorbing shell, dividing the interior of the shell into an air cavity and a sound-absorbing cavity. The air cavity and the sound-absorbing cavity are independent of each other. A sound hole is formed on the side of the air cavity facing the diaphragm, and the sound-absorbing cavity is filled with sound-absorbing particles. When sound waves enter the air cavity and the sound-absorbing cavity through the sound hole, the sound-absorbing particles in the sound-absorbing cavity couple with the air in the cavity. The sound-absorbing particles exert their energy-absorbing properties, reducing sound wave reflections within the cavity, improving high-frequency resonance, lowering the resonant frequency, and extending low-frequency response, thereby enhancing acoustic performance, particularly low-frequency performance. The separation net isolates the sound-absorbing particles, preventing them from escaping from the sound-absorbing cavity into the air cavity. This ensures that the air in the cavity can better couple with the sound-absorbing particles within the sound-absorbing cavity and that the sound-absorbing particles within the sound-absorbing cavity can properly exert their energy-absorbing properties.

[0033] Compared with the prior art method of reducing the frequency peak by adding an additional resonance cavity in front of the speaker diaphragm or adding an additional back cavity at the bottom or side of the U iron, the sound-emitting unit of the present invention can utilize its own structure, that is, the installation cavity formed by the diaphragm, voice coil and magnetic circuit system to realize the installation and accommodation of the sound-absorbing shell. In addition, a cavity and a sound-absorbing cavity are formed in the sound-absorbing shell. Through the coupling effect of the air in the cavity and the sound-absorbing particles in the sound-absorbing cavity and the energy absorption characteristics of the sound-absorbing particles, the high-frequency resonance is improved, the resonant frequency is reduced, and the low-frequency response is extended, thereby improving the acoustic performance of the sound-emitting unit. There is no need to add an additional resonance cavity in front of the diaphragm, nor is there a need to add an additional back cavity at the bottom or side of the U iron of the magnetic circuit system. Furthermore, there is no need to increase the size and volume of the sound-emitting unit, which is conducive to miniaturization design.

[0034] Compared with the existing method of injecting magnetic fluid into the magnetic gap to increase damping and thus reduce the resonance peak, the sound unit of the present invention does not need to be injected with magnetic fluid and is not affected by temperature fluctuations, thereby ensuring that the acoustic performance of the sound device is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0036] FIG1 is a schematic diagram of the assembly of a sound-emitting unit according to an embodiment of the present invention;

[0037] FIG2 is an exploded schematic diagram of a sound-emitting unit according to an embodiment of the present invention;

[0038] FIG3 is a schematic cross-sectional view of a sound-emitting unit according to an embodiment of the present invention;

[0039] FIG4 is a schematic structural diagram of a cover body in a sound-emitting unit according to an embodiment of the present invention.

[0040] Description of Figure Numbers:

[0041] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The present invention provides a sound unit 100 .

[0046] As shown in Figures 1 to 4, in one embodiment, the sound-emitting unit 100 includes a vibration system 10, a magnetic circuit system 20 and a sound-absorbing shell 40, wherein the vibration system 10 includes a diaphragm 11 and a voice coil 12 connected to the diaphragm 11; the magnetic circuit system 20 is located on one side of the vibration system 10, and the magnetic circuit system 20 forms a magnetic gap 24. The voice coil 12 is suspended in the magnetic gap 24, and the diaphragm 11, the voice coil 12 and the magnetic circuit system 20 together form an installation cavity 30; the sound-absorbing shell 40 is accommodated in the installation cavity 30, and an isolation net 44 is provided in the sound-absorbing shell 40. The isolation net 44 divides the inner cavity of the sound-absorbing shell 40 into a mutually independent cavity 41 and a sound-absorbing cavity 42. The cavity 41 is located on the side close to the diaphragm 11, and a sound hole 43 is formed on the side of the cavity 41 facing the diaphragm 11. The sound-absorbing cavity 42 is filled with sound-absorbing particles 45. The isolation net 44 is used to isolate the sound-absorbing particles 45.

[0047] It should be noted that the sound-emitting unit 100 of the present invention is used in a sound-emitting device. The sound-emitting device can be a speaker or other functional device capable of producing sound. The sound-emitting unit 100 is a speaker unit used in a speaker, or a sound-emitting unit 100 used in other functional devices capable of producing sound. The sound-emitting unit 100 of the present invention is described using a speaker unit used in a speaker as an example. The speaker can be used in application devices such as smart terminals or vehicles.

[0048] Specifically, as shown in Figures 2 and 3, the magnetic circuit system 20 of the sound unit 100 is located below the vibration system 10. The magnetic circuit system 20 forms a magnetic gap 24. The voice coil 12 of the vibration system 10 is suspended in the magnetic gap 24. When an electrical signal is applied, it can cut the magnetic flux lines, causing it to vibrate up and down, thereby driving the diaphragm 11 to vibrate up and down and produce sound. Furthermore, in the sound unit 100 of this embodiment, the diaphragm 11, voice coil 12, and magnetic circuit system 20 together form a mounting cavity 30. The sound-absorbing shell 40 can be accommodated within the mounting cavity 30. The sound-absorbing shell 40 is provided with an isolation net 44 that divides its interior into a cavity 41 and a sound-absorbing cavity 42. The cavity 41 and the sound-absorbing cavity 42 are mutually independent. The cavity 41 is located on the upper side, and the sound-absorbing cavity 42 is located on the lower side. The cavity 41 is formed with a sound hole 43 on the side facing the diaphragm 11, i.e., the upper side. The sound-absorbing cavity 42 is filled with sound-absorbing particles 45. When sound waves enter cavity 41 and sound absorption cavity 42 through sound holes 43, the sound-absorbing particles 45 in cavity 42 couple with the air in cavity 41. These particles absorb energy, reducing sound wave reflection within cavity 42 and improving high-frequency resonance. This lowers the resonant frequency and extends low-frequency response, enhancing acoustic performance, particularly low-frequency performance. This improves sound quality and enhances the acoustic performance of sounding unit 100. Isolation mesh 44 isolates sound-absorbing particles 45, preventing them from escaping from cavity 42 into cavity 41. This ensures better coupling between the air in cavity 41 and the sound-absorbing particles 45 in cavity 42, while also ensuring that the sound-absorbing particles 45 in cavity 42 properly function.

[0049] Compared with the prior art method of reducing the frequency peak by adding an additional resonance cavity in front of the speaker diaphragm 11 or adding an additional back cavity at the bottom or side of the U iron, the sound-emitting unit 100 of the present invention can utilize its own structure, that is, the installation cavity 30 formed by the diaphragm 11, the voice coil 12 and the magnetic circuit system 20 to realize the installation and accommodation of the sound-absorbing shell 40. In addition, a cavity 41 and a sound-absorbing cavity 42 are formed in the sound-absorbing shell 40. Through the coupling effect of the air in the cavity 41 and the sound-absorbing particles 45 in the sound-absorbing cavity 42 and the energy absorption characteristics of the sound-absorbing particles 45, the high-frequency resonance is improved, the resonant frequency is reduced, and the low-frequency response is extended, thereby improving the acoustic performance of the sound-emitting unit 100. There is no need to add an additional resonance cavity in front of the diaphragm 11, nor is there a need to add an additional back cavity at the bottom or side of the U iron of the magnetic circuit system 20. Furthermore, there is no need to increase the size and volume of the sound-emitting unit 100, which is conducive to miniaturization design.

[0050] Compared with the prior art method of injecting magnetic fluid into the magnetic gap to increase damping and thereby reduce the resonance peak, the sound-generating unit 100 of the present invention does not need to be injected with magnetic fluid and is not affected by temperature fluctuations, thereby ensuring that the acoustic performance of the sound-generating device is not affected.

[0051] In one embodiment, the sound-absorbing shell 40 includes a cover 46 and a shell 47, wherein the cover 46 is provided with a sound hole 43, an isolation net 44 is arranged in the cover 46, and the cover 46 and the isolation net 44 together form a cavity 41; one side of the shell 47 is connected to the magnetic circuit system 20, and the cover 46 is connected to the side of the shell 47 facing the diaphragm 11, and the isolation net 44, the cover 46 and the shell 47 together form a sound-absorbing cavity 42.

[0052] Specifically, the lower side of the housing 47 is connected to the magnetic circuit system 20, and the cover 46 is mounted on the upper side of the housing 47, thereby assembling the sound-absorbing shell 40 and the magnetic circuit system 20. The cover 46 is provided with sound holes 43 to facilitate sound absorption. The isolation net 44 is disposed within the cover 46 and, together with the cover 46, forms a cavity 41. The isolation net 44, the cover 46, and the housing 47 together form a sound-absorbing cavity 42, which utilizes the energy absorption properties of the sound-absorbing particles 45 therein and the coupling effect between the air in the cavity 41 and the sound-absorbing particles 45 in the sound-absorbing cavity 42.

[0053] In this embodiment, the sound absorbing shell 40 forms the cavity 41 and the sound absorbing cavity 42 by utilizing the cooperation between the cover 46 , the isolation net 44 and the shell 47 . The structural design is ingenious and reasonable, and the compactness of the sound absorbing shell 40 is improved.

[0054] As shown in Figures 2 to 4, the cover body 46 includes a top wall 461 and a first side wall 462. The top wall 461 is provided with a sound hole 43. The first end of the first side wall 462 is connected to the outer periphery of the top wall 461. The second end of the first side wall 462 is connected to the shell 47. The isolation net 44 is located between the top wall 461 and the shell 47, and the outer periphery of the isolation net 44 is surrounded and abutted against the inner side of the first side wall 462. The top wall 461 and the isolation net 44 together form a cavity 41. The isolation net 44, the first side wall 462 and the shell 47 together form a sound absorption cavity 42.

[0055] The top wall 461 forms the top of the cover body 46, and the top wall 461 is provided with a sound hole 43. The first end of the first side wall 462, that is, the upper end, is connected to the outer periphery of the top wall 461, and the second end of the first side wall 462, that is, the lower end, is connected to the shell 47. The isolation net 44 is located between the top wall 461 and the shell 47, and the outer periphery of the isolation net 44 is surrounded and abutted against the inner side of the first side wall 462, so that the top wall 461 and the isolation net 44 are surrounded to form a cavity 41, and the isolation net 44, the first side wall 462 and the shell 47 are surrounded to form a sound absorption cavity 42. The structural design is ingenious and reasonable, and the structure is compact.

[0056] In order to fix the isolation net 44 and the cover body 46, a connecting component connected to the isolation net 44 is provided on the inner side of the cover body 46, that is, the isolation net 44 is connected to the cover body 46 through the connecting component, and the connecting component avoids the sound hole 43 and does not interfere with the sound waves entering and exiting through the sound hole 43.

[0057] In one embodiment, the connection assembly includes a plurality of connection ribs 463, which are spaced apart along the circumference of the cover 46. The isolation net 44 is connected to the cover 46 via the plurality of connection ribs 463, providing a secure connection. Furthermore, the plurality of connection ribs 463 are spaced apart along the circumference of the cover 46. Specifically, the plurality of connection ribs 463 are evenly spaced along the circumference of the cover 46, facilitating uniform flow of air entering the cavity 41 and optimizing the coupling effect between the air in the cavity 41 and the sound-absorbing particles 45 in the sound-absorbing cavity 42.

[0058] Furthermore, there are multiple sound holes 43, one of which is located in the middle of the cover body 46, and the remaining sound holes 43 are spaced apart around the sound hole 43 in the middle. Specifically, the remaining sound holes 43 are evenly spaced around the sound hole 43 in the middle, further improving the flow uniformity of the air entering the cavity 41.

[0059] Furthermore, among the remaining sound holes 43 , a connecting rib 463 is provided between any two adjacent sound holes 43 , so that the multiple connecting ribs 463 are evenly distributed along the circumference of the cover body 46 , and the structural design is reasonable and simple.

[0060] In one embodiment, the connection assembly further includes a connection tube 464 , one end of which is connected to the top wall 461 and communicates with the sound hole 43 located in the middle of the cover body 46 , and the other end of the connection tube 464 is connected to the isolation net 44 .

[0061] Specifically, as shown in Figures 3 and 4, the upper end of the connecting tube 464 is connected to the top wall 461, and the upper end of the connecting tube 464 is connected to the sound hole 43 located in the middle position of the cover body 46 to facilitate the entry and exit of sound waves. The lower end of the connecting tube 464 is connected to the isolation net 44 to improve the stability of the connection between the isolation net 44 and the cover body 46.

[0062] In one embodiment, the cavity 41 is configured to gradually expand from the top wall 461 toward the shell 47, that is, the cavity 41 gradually expands from top to bottom, thereby increasing the volume of the cavity 41 from top to bottom, improving the air capacity of the cavity 41, and optimizing the coupling effect between the air in the cavity 41 and the sound-absorbing particles 45 in the sound-absorbing cavity 42.

[0063] In one embodiment, the diaphragm 11 forms a dome 111 at a position corresponding to the top wall 461 , and the top wall 461 is an arched top wall 461 that arches toward the dome 111 , and the arch curvature of the top wall 461 is consistent or substantially consistent with the curvature of the dome 111 , and there is a gap 50 between the top wall 461 and the dome 111 .

[0064] The diaphragm 11 is a spherical top 111-shaped diaphragm 11. The position of the diaphragm 11 corresponding to the top wall 461 forms the spherical top 111, and the top wall 461 is arched toward the spherical top 111, that is, an arched top wall 461 that arches upward. The curvature of the top wall 461 is consistent or substantially consistent with the curvature of the spherical top 111, so that the arched shape of the top wall 461 matches the shape of the spherical top 111. The top wall 461 can support the diaphragm 11 when the diaphragm 11 is under pressure, preventing the diaphragm 11 from sinking and deforming when under pressure. It can be understood that the curvature of the top wall 461 is substantially consistent with the curvature of the spherical top 111, which means that the difference between the curvature of the top wall 461 and the curvature of the spherical top 111 is within a controllable range. There is a gap 50 between the top wall 461 and the spherical top 111. The gap 50 provides a normal vibration space for the diaphragm 11, and the structural design is reasonable.

[0065] In a preferred embodiment, the distance between the top wall 461 and the dome 111 is 0.5 mm to 10 mm, thereby providing a reasonable vibration space for the vibration of the diaphragm 11, avoiding the situation where the distance is too small to hinder the vibration of the diaphragm 11, and avoiding the situation where the distance is too large to provide no support for the diaphragm 11 when the diaphragm 11 is compressed and depressed.

[0066] In one embodiment, the isolation net 44 has an arched structure that arches toward the top wall 461 to form a cavity 41 of relatively uniform volume between the isolation net 44 and the top wall 461 , thereby facilitating improved uniformity in coupling between the air in the cavity 41 and the sound-absorbing particles 45 in the sound-absorbing cavity 42 .

[0067] As shown in Figures 3 and 4 , a stopper protrusion 465 is formed near the first side wall 462 of the top wall 461, protruding toward one side of the sound absorption chamber 42. The isolation net 44 is connected to the stopper protrusion 465. Specifically, a stopper protrusion 465 is formed near the bottom end of the top wall 461, protruding toward one side of the sound absorption chamber 42, that is, protruding inward. This allows the isolation net 44 to be connected to the stopper protrusion 465, thereby facilitating installation of the isolation net 44. It will be appreciated that the stopper protrusion 465 is an annular protrusion extending along the circumference of the top wall 461, allowing for full connection with the isolation net 44.

[0068] In one embodiment, the shell 47 includes a bottom wall 471 and a second side wall 472. The bottom wall 471 is connected to the magnetic circuit system 20. The second side wall 472 is connected to the outer periphery of the bottom wall 471 and is sleeved on the outer periphery of the first side wall 462. The second end of the first side wall 462 is connected to the bottom wall 471. The isolation net 44, the first side wall 462 and the bottom wall 471 together form the sound absorption chamber 42.

[0069] Specifically, the bottom wall 471 forms the bottom of the shell 47, and the bottom wall 471 is connected to the magnetic circuit system 20 to achieve assembly with the magnetic circuit system 20. The second side wall 472 is connected to the outer periphery of the bottom wall 471, and the second side wall 472 is sleeved on the outer periphery of the first side wall 462, thereby improving the assembly accuracy and stability of the shell 47 and the cover body 46; and the second end of the first side wall 462, that is, the lower end of the first side wall 462 is connected to the bottom wall 471, which not only improves the assembly stability of the shell 47 and the cover body 46, but also allows the isolation net 44, the first side wall 462 and the bottom wall 471 to enclose and form the sound absorption chamber 42. The structural design is reasonable, simple, and highly compact.

[0070] In one embodiment, the cover 46 is a one-piece molded component, eliminating assembly steps and gaps, reducing assembly errors, and facilitating manufacturing. The housing 47 is also a one-piece molded component, eliminating assembly steps and gaps, reducing assembly errors, and facilitating manufacturing. The cover 46 and housing 47 can be made of polymer plastic, metal, hard rubber, or hard paper, all of which are easy to source and manufacture. The sound-absorbing particles 45 can be conventional bass powder. The isolation mesh 44 can be a metal isolation mesh or a fabric isolation mesh.

[0071] In one embodiment, the ratio of the area of ​​the sound hole 43 to the area of ​​the top wall 461 is 0.1 to 0.5. It is understood that when there is only one sound hole 43, the ratio of the area of ​​the sound hole 43 to the area of ​​the top wall 461 is 0.1 to 0.5, so that the area of ​​the sound hole 43 on the top wall 461 accounts for 10% to 50% of the area of ​​the top wall 461, which is neither too large nor too small, ensuring the optimal sound absorption effect. When there are multiple sound holes 43, the ratio of the sum of the areas of the multiple sound holes 43 to the area of ​​the top wall 461 is 0.1 to 0.5, so that the sum of the areas of the multiple sound holes 43 on the top wall 461 accounts for 10% to 50% of the area of ​​the top wall 461, which is neither too large nor too small, ensuring the optimal sound absorption effect.

[0072] In a preferred embodiment, the number of sound holes 43 is 1 to 20, which allows for better coupling between sound waves and the sound-absorbing particles 45, thereby providing a damping effect and reducing low-frequency peaks. The shape of the sound holes 43 can be configured according to actual conditions and may be circular, square, or rectangular.

[0073] As can be understood, the sound-absorbing particles 45 within the sound-absorbing cavity 42 of the sound-emitting unit 100 of the present invention absorb sound primarily through friction, multiple reflections, and resonance. When sound waves propagate through the cavity 41 and the isolation mesh 44 to the surface of the sound-absorbing particles 45, the fibers, fillers, and microporous structure within the particles 45 generate friction with the sound waves. When the speaker diaphragm 11 vibrates at high frequencies, the fine three-dimensional pore structure absorbs and desorbs the high frequencies of the sound waves, thereby reducing the resistance of the diaphragm 11 and creating an acoustic effect similar to increasing the physical back cavity. This lowers the resonant frequency and improves acoustic performance, particularly at low frequencies.

[0074] In one embodiment, the volume ratio of the sound absorbing cavity 42 to the cavity 41 is 1 to 3. Preferably, the volume ratio of the sound absorbing cavity 42 to the cavity 41 is 7.3:2.7. The sound absorbing cavity 42 acts mainly and the cavity 41 acts as an auxiliary to achieve the energy absorption characteristics of the sound absorbing particles 45, improve high-frequency resonance, reduce the resonant frequency, extend the low-frequency response, and enhance the coupling effect between the sound absorbing particles 45 in the sound absorbing cavity 42 and the air in the cavity 41.

[0075] In one embodiment, the sound absorbing shell 40 is of a centrally symmetrical structure, so that the cover 46, the shell 47 and the isolation net 44 are all of a centrally symmetrical structure, so that the airflow entering the cavity 41 can be symmetrical and uniform to avoid distortion.

[0076] It should be noted that the sound-emitting unit 100 of the present invention may include one or more sound-absorbing shells 40. If there is only one sound-absorbing shell 40, it can be located in the center of the mounting cavity 30. If there are multiple sound-absorbing shells 40, they can be evenly distributed around the center of the mounting cavity 30. Alternatively, one sound-absorbing shell 40 can be located in the center of the mounting cavity 30, while the remaining sound-absorbing shells 40 can be evenly distributed around the center of the mounting cavity 30.

[0077] In one embodiment, the magnetic circuit system 20 includes a first magnet 21, a second magnet 22, and a magnetic conductive plate 23. The magnetic conductive plate 23 and the second magnet 22 are stacked in sequence in a direction away from the diaphragm 11. The first magnet 21 is covered by the magnetic conductive plate 23 and the second magnet 22, and a magnetic gap 24 is formed between the first magnet 21 and the magnetic conductive plate 23 and the second magnet 22. The diaphragm 11, the voice coil 12, and the magnetic conductive plate 23 together form an installation cavity 30, and the sound-absorbing shell 40 is connected to the magnetic conductive plate 23.

[0078] As shown in Figures 2 and 3, the magnetic plate 23 and second magnet 22 are stacked from top to bottom. The first magnet 21 is a U-shaped iron with its open end facing the diaphragm 11 (i.e., its open end faces upward). It is located outside the magnetic plate 23 and second magnet 22. A magnetic gap 24 is formed between the first magnet 21, the magnetic plate 23, and the second magnet 22 to allow the voice coil 12 to suspend. The magnetic plate 23 corrects the magnetic lines of force. The diaphragm 11, voice coil 12, and magnetic plate 23 together form a mounting cavity 30 for accommodating the composite shell. The sound-absorbing shell 40 can be installed by connecting it to the magnetic plate 23, resulting in a rational and ingenious structural design. The bottom of the sound-absorbing shell 40 and the magnetic plate 23 can be glued together to achieve a sealed connection.

[0079] In one embodiment, the sound-generating device further includes a basin 60 and a bracket 70. The bracket 70 is annular. The magnetic circuit system 20 is installed in the bracket 70. The basin 60 is covered outside the vibration system 10 and the bracket 70. The basin 60 has an opening 61 at the position corresponding to the diaphragm 11, and the diaphragm 11 is connected to the basin 60 and / or the bracket 70.

[0080] By setting the basin frame 60 and the bracket 70, the assembly of the vibration system 10, the magnetic circuit system 20, the resonance shell, the basin frame 60 and the bracket 70 is achieved, and then the overall assembly of the sound-emitting unit 100 is achieved. The basin frame 60 has an opening 61 at the position corresponding to the diaphragm 11. The opening 61 provides a sound outlet channel for the diaphragm 11 to vibrate and produce sound, and the design is reasonable. In one embodiment, the edge of the diaphragm 11 is connected to the basin frame 60 to achieve the installation of the diaphragm 11; in another embodiment, the edge of the diaphragm 11 is connected to the bracket 70 to achieve the installation of the diaphragm 11; in yet another embodiment, the edge of the diaphragm 11 is connected to the basin frame 60 and the bracket 70 to achieve the installation of the diaphragm 11. The diaphragm 11 can be selectively connected to the basin frame 60 and / or the bracket 70, which is flexible and convenient.

[0081] The present invention also provides a sound-producing device, comprising a protective housing and the aforementioned sound-producing unit 100 housed within the protective housing. The sound-producing device of the present invention may be a speaker or other functional device capable of producing sound. Because this sound-producing device utilizes all of the technical solutions of all of the aforementioned embodiments, it possesses at least all of the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated upon here.

[0082] The present invention also provides an application device comprising a housing and the aforementioned sound-generating device housed within the housing. The application device of the present invention may be a smart terminal or a vehicle, for example. The specific structure of the sound-generating device in the application device is similar to the above-described embodiments. Since the present application device utilizes all the technical solutions of all the above-described embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above-described embodiments, and therefore will not be further elaborated here.

[0083] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, within the scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. A sound-emitting unit, characterized in that: The sound-emitting unit includes: a vibration system comprising a diaphragm and a voice coil connected to the diaphragm; a magnetic circuit system, the magnetic circuit system being located on one side of the vibration system, the magnetic circuit system forming a magnetic gap, the voice coil being suspended in the magnetic gap, and the diaphragm, the voice coil, and the magnetic circuit system together forming a mounting cavity; A sound-absorbing shell is accommodated in the installation cavity. An isolation net is provided in the sound-absorbing shell. The isolation net divides the inner cavity of the sound-absorbing shell into a cavity and a sound-absorbing cavity that are independent of each other. The cavity is located on a side close to the diaphragm, and a sound hole is formed on the side of the cavity facing the diaphragm. The sound-absorbing cavity is filled with sound-absorbing particles, and the isolation net is used to isolate the sound-absorbing particles.

2. The sound-emitting unit according to claim 1, wherein: The sound-absorbing shell comprises: A cover body, wherein the sound hole is formed in the cover body, the isolation net is arranged in the cover body, and the cover body and the isolation net together form the cavity; A shell, one side of the shell is connected to the magnetic circuit system, the cover is connected to the side of the shell facing the diaphragm, and the isolation net, the cover and the shell together form the sound absorption cavity.

3. The sound-emitting unit according to claim 2, characterized in that: The cover body includes a top wall and a first side wall, the top wall is provided with the sound hole, the first end of the first side wall is connected to the outer periphery of the top wall, the second end of the first side wall is connected to the shell, the isolation net is located between the top wall and the shell, and the outer periphery of the isolation net is in contact with the inner side of the first side wall, the top wall and the isolation net together form the cavity, and the isolation net, the first side wall and the shell together form the sound absorption cavity.

4. The sound-emitting unit according to claim 3, characterized in that: A connecting component connected to the isolation net is provided on the inner side of the cover body, and the connecting component avoids the sound hole.

5. The sound-emitting unit according to claim 4, characterized in that: The connecting assembly includes a plurality of connecting ribs, and the plurality of connecting ribs are distributed at intervals along the circumference of the cover body.

6. The sound-emitting unit according to claim 5, characterized in that: There are multiple sound holes, one of which is located in the middle of the cover body, and the other sound holes are distributed at intervals around the sound hole in the middle.

7. The sound-emitting unit according to claim 6, characterized in that: Among the remaining sound holes, a connecting rib is provided between any two adjacent sound holes.

8. The sound-emitting unit according to claim 6, characterized in that: The connecting assembly further includes a connecting pipe, one end of which is connected to the top wall and communicates with the sound hole located in the middle of the cover body, and the other end of the connecting pipe is connected to the isolation net.

9. The sound-emitting unit according to any one of claims 3 to 8, characterized in that: The cavity is gradually expanded from the top wall toward the shell.

10. The sound-emitting unit according to claim 9, characterized in that: The diaphragm forms a spherical top at a position corresponding to the top wall. The top wall is an arched top wall that arches toward the spherical top. The arching curvature of the top wall is consistent or substantially consistent with the curvature of the spherical top. There is a gap between the top wall and the spherical top.

11. The sound-emitting unit according to claim 10, wherein: The distance between the top wall and the spherical top is 0.5 mm to 10 mm.

12. The sound-emitting unit according to claim 10, wherein: The isolation net is in an arched structure that arches toward the top wall.

13. The sound-emitting unit according to any one of claims 3 to 8, characterized in that: A limiting boss protruding toward one side of the sound absorbing cavity is formed on the top wall at a position close to the first side wall, and the isolation net is connected to the limiting boss.

14. The sound-emitting unit according to any one of claims 3 to 8, characterized in that: The shell includes a bottom wall and a second side wall, the bottom wall is connected to the magnetic circuit system, the second side wall is connected to the outer periphery of the bottom wall, and the second side wall is sleeved on the outer periphery of the first side wall; the second end of the first side wall is connected to the bottom wall, and the isolation net, the first side wall and the bottom wall together form the sound absorption cavity.

15. The sound-emitting unit according to any one of claims 3 to 8, characterized in that: The ratio of the area of ​​the sound hole to the area of ​​the top wall is 0.1 to 0.

5.

16. The sound-emitting unit according to any one of claims 1 to 8, characterized in that: The volume ratio of the sound absorbing cavity to the cavity is 1-3.

17. The sound-emitting unit according to any one of claims 1 to 8, characterized in that: The sound-absorbing shell has a centrally symmetrical structure.

18. The sound-emitting unit according to any one of claims 1 to 8, characterized in that: The magnetic circuit system includes a first magnet, a second magnet and a magnetic conductive plate. The magnetic conductive plate and the second magnet are stacked in sequence in a direction away from the diaphragm. The first magnet cover is arranged outside the magnetic conductive plate and the second magnet, and the magnetic gap is formed between the first magnet, the magnetic conductive plate and the second magnet. The diaphragm, the voice coil and the magnetic conductive plate together form the installation cavity, and the sound-absorbing shell is connected to the magnetic conductive plate.

19. The sound-emitting unit according to any one of claims 1 to 8, characterized in that: The sound-generating device also includes a basin and a bracket. The bracket is annular. The magnetic circuit system is installed in the bracket. The basin cover is arranged outside the vibration system and the bracket. The basin has an opening at the position corresponding to the diaphragm. The diaphragm is connected to the basin and / or the bracket.

20. A sound-generating device, characterized in that: The sound-emitting device includes a protective shell and a sound-emitting unit according to any one of claims 1 to 19 housed in the protective shell.

21. An application device, characterized in that: The application device housing and the sound-generating device according to claim 20 housed in the housing.

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