WO2021026786A1

WO2021026786A1 - Acoustic radiation assembly and sound emitting device

Info

Publication number: WO2021026786A1
Application number: PCT/CN2019/100454
Authority: WO
Inventors: 杨修康
Original assignee: 海能达通信股份有限公司
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2021-02-18

Abstract

An acoustic radiation assembly (100) and a sound emitting device (200). The acoustic radiation assembly (100) comprises a sound emitting member (10), a housing (20), and a passive radiation member (30). The sound emitting member (10) is accommodated and assembled in the housing (20). A sound output channel (201) is provided on the housing (20). The sound output channel (201) is located in front of a sound emitting direction of the sound emitting member (10). The passive radiation member (30) is accommodated and assembled in the housing (20). The passive radiation member (30) is located in front of the sound emitting direction of the sound emitting member (10), and is located at a side edge of the sound output channel (201). A gap exists between the passive radiation member (30) and the sound emitting member (10) so as to form a first chamber (202). The first chamber (202) communicates with the sound output channel (201). A gap exists between the housing (20) and a side of the passive radiation member (30) facing away from the sound emitting member (10). A gap exists between the housing (20) and a side of the sound emitting member (10) facing away from the passive radiation member (30) so as to form a second chamber (203). The sound emitting member (10) at least partially directly faces the sound output channel (201) in the sound emitting direction. The sound emitting member (10) at least partially directly faces the passive radiation member (30) in the sound emitting direction. The invention improves the sound intensity of the acoustic radiation assembly (100), effectively ensures that high-pitched sound is directly outputted, and improves a low frequency effect, thereby effectively improving sound quality.

Description

Acoustic radiation components and sound emitting equipment

【Technical Field】

This application relates to the field of audio technology, in particular to acoustic radiation components and sound emitting equipment.

【Background technique】

The speaker is a transducer device that can convert electrical signals into sound signals. It produces sound by driving the paper cone or diaphragm on it to vibrate and resonate with the surrounding air. The combination of the speaker and the cavity can improve the performance of the speaker. Pronunciation quality.

With the demand for larger screens, lighter, thinner, and smaller products, users and manufacturers have higher requirements for the cavity, such as the pursuit of products with smaller structural designs and better sound effects, such as high-quality bass effects, etc. .

The inventor of the present application found that the traditional sound cavity structure is too complicated, which is not conducive to mass production, and is easily damaged; with the miniaturization of the size of the sound cavity, the sound radiation energy inside the sound cavity is not fully utilized, and It is not easy to achieve a good treble or bass effect, and it is easy to cause the overall sound quality to decrease.

[Content of the invention]

The present application provides an acoustic radiation component and a sound emitting device to solve the technical problems that the existing acoustic radiation component is not easy to produce good treble or bass effects and poor sound quality.

In order to solve the above technical problems, a technical solution adopted in this application is to provide an acoustic radiation component, including:

Pronunciation pieces;

The shell contains and assembled the sound element, the shell is provided with a sound channel, and the sound channel is located at the front side of the sound direction of the sound element;

The passive radiating element is housed and assembled in the housing. The passive radiating element is located on the front side of the sounding element and on the side of the sound channel. There is a gap between the passive radiating element and the sounding element to form a first chamber, The first chamber communicates with the sound channel, a gap between the side of the passive radiating element and the housing, and a gap between the side of the passive radiating element and the housing to form a second cavity Room, wherein the sounding piece is at least partially facing the sound channel along the sounding direction, and the sounding piece is facing the passive radiating piece at least partially along the sounding direction.

In order to solve the above technical problems, another technical solution adopted by this application is to provide a sound generating device, which includes:

The driving circuit is connected to the acoustic radiation component; the acoustic radiation component also includes:

Sound piece, connected with the drive circuit;

The housing contains the drive circuit and the sound element. The housing is provided with a sound channel, which is located in front of the sound direction of the sound member;

The passive radiating element is housed and assembled in the housing. The passive radiating element is located on the front side of the sounding element and on the side of the sound channel. There is a gap between the passive radiating element and the sounding element to form a first chamber, The first chamber communicates with the sound channel, a gap between the side of the passive radiating element and the housing, and a gap between the side of the passive radiating element and the housing to form a second cavity Room, wherein the sounding component is at least partially facing the sound channel along the sounding direction, and the sounding component is at least partially facing the passive radiating member along the sounding direction.

The beneficial effects of the present application are: by arranging the sound element in the housing, the first cavity of the sound element is connected to the sound outlet channel, and the passive radiation element is arranged on the front side of the sound direction of the sound element, so that the second cavity The energy in the room is inverted by the passive radiating element, wherein the sounding element is at least partially facing the sound channel along the sounding direction, and the sounding element is at least partially facing the passive radiating element along the sounding direction, so that the second chamber Make full use of the energy to make its propagation direction the same as the propagation direction in the first chamber, which can reduce the sound loss of the acoustic radiation component, improve the sound loudness of the acoustic radiation component, and effectively ensure that the treble is directly facing and the low frequency effect is improved. It can effectively improve the sound quality.

【Explanation of drawings】

FIG. 1 is a schematic cross-sectional structure diagram of an embodiment of an acoustic radiation component of the present application;

2 is a schematic diagram of the overall structure of another embodiment of the acoustic radiation component of the present application;

Figure 3 is a schematic diagram of the exploded structure in Figure 2;

FIG. 4 is a schematic diagram of the exploded structure from another perspective in FIG. 2;

FIG. 5 is a schematic diagram of the structure of the housing part of an embodiment of the acoustic radiation component of the present application;

Fig. 6 is another structural schematic view of the housing part of an embodiment of the acoustic radiation component of the present application;

7 is a schematic diagram of the overall structure of another embodiment of the acoustic radiation component of the present application;

FIG. 8 is a comparison diagram of frequency response curves of the acoustic radiation component of this application and the acoustic radiation component in the prior art in the acoustic performance test;

FIG. 9 is a comparison diagram of impedance curves of the acoustic radiation component of this application and the acoustic radiation component in the prior art in the acoustic performance test;

Fig. 10 is a schematic structural diagram of an embodiment of a sound generating device of the present application.

【detailed description】

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

Referring to FIG. 1, the embodiment of the acoustic radiation component of the present application provides an acoustic radiation component 100. The acoustic radiation component 100 includes: a sounding element 10, a housing 20 and a passive radiating element 30.

The sound element 10 may be a sound element such as a speaker. The housing 20 accommodates and assembles the sounding element 10, and it can be understood that the sounding element 10 is disposed in the housing 20. The housing 20 is provided with a sound channel 201, and the sound channel 201 is located on the front side of the sounding element 10 in the sounding direction. It can be understood that the vertical projection of the sound channel 201 and the sound element 10 may partially overlap or may not overlap.

The passive radiating element 30 is housed and assembled in the housing 20. The passive radiating element 30 may be a false horn (that is, there is no internal voice coil and driving magnetic block, etc.) or a folded ring or a plate-like or sheet-like structure made of other flexible materials. For example, the shape of the passive radiating element 30 may be circular, rectangular, or elliptical. The passive radiating element 30 is located at the front side of the sounding direction of the sounding element 10 and at the side of the sounding channel 201. There is a gap between the passive radiation element 30 and the sound element 10 to form the first cavity 202. The first chamber 202 is in communication with the sound channel 201. There is a gap between the side of the passive radiator 30 away from the sound element 10 and the housing 20, and the side of the sound element 10 away from the passive radiator 30 and the housing 20 have a gap to form a second cavity 203. Wherein, the sounding element 10 is at least partially facing the sound channel 201 along the sounding direction, and the sounding element 10 is at least partially facing the passive radiating element 30 along the sounding direction. For example, along the sounding direction, the sounding element 10 may be half facing the sound channel 201 and half facing the passive radiating member 30. Of course, the area of the sounding element 10 facing the passive radiating element 30 can also be larger or smaller than the area of the sounding element 10 facing the sound channel 201. The details are not limited here.

It can be understood that when the sound element 10 is driven, the diaphragm (not shown in the figure) of the sound element 10 will push the air in the first chamber 202 and the second chamber 203 to vibrate, and the air in the first chamber 202 will vibrate. The direction is opposite to the direction of air vibration in the second chamber 203. Since the first chamber 202 directly corresponds to the forward direction of the sound element 10, the energy generated by the air vibration of the first chamber 202 is much greater than the energy generated by the air vibration of the second chamber 203, and the sound element 10 is arranged in the housing 20 As a result, the second chamber 203 forms a closed chamber, and the first chamber 202 is in communication with the sound channel 201, so the sound generating element 10 sounds toward one side of the first chamber 202. That is, the sounding direction of the sounding element 10 is toward the side of the first cavity 202. A part of the sound of the sounding element 10 can be directly emitted from the first chamber 202 to the sounding channel 201, and the other part can be transmitted toward the passive radiating element 30. The passive radiator 30 can reverse the air vibration direction in the second chamber 203, so that the air vibration direction in the second chamber 203 can be in the same phase as the air vibration direction in the first chamber 202. That is, the air vibration generated in the second chamber 203 is fully utilized, thereby realizing the dual cavity resonance of the first chamber 202 and the second chamber 203.

By arranging the sounding element 10 in the housing 20, the first cavity 202 of the sounding element 10 is communicated with the sounding channel 201, and the passive radiating element 30 is arranged on the front side of the sounding direction of the sounding element 10, so that the second cavity The energy in the chamber 203 is phase-inverted by the passive radiating element 30, so that the energy in the second chamber 203 can be fully utilized so that its propagation direction is the same as the propagation direction in the first chamber 202, and the sound element 10 is The sounding direction is at least partly facing the sound channel 201, and the sounding element 10 is at least partially facing the passive radiating element 30 along the sounding direction, which can effectively ensure the low-frequency effect while improving the high-frequency effect of the acoustic radiation component 100, thereby reducing acoustic radiation The sound loss of the component 100 improves the sound loudness of the acoustic radiation component 100, and effectively ensures that the treble is directly output and the low-frequency effect is improved, thereby effectively improving the sound quality.

In some embodiments, referring to FIG. 2, FIG. 3, and FIG. 5, the housing 20 may further include a surrounding wall 21 and a central partition 22. From a top view, the surrounding wall 21 may be quadrilateral or arc-shaped. The specific shape is not limited here. The middle partition 22 is connected to the surrounding wall 21, and the middle partition 22 and the surrounding wall 21 may be integrally formed or separately fixedly connected. A mounting ring 223 and an opening 224 are provided on the middle partition 22. The opening 224 may be circular, elliptical, quadrilateral, or other irregular shapes. The space enclosed by the assembly ring 223 may also be a circle, an ellipse, a quadrilateral or other irregular ring shapes. The opening 224 at least partially overlaps with the space enclosed by the mounting ring 223 in the projection direction. The assembling ring 223 is used for assembling the sound element 10, and the passive radiating element 30 covers the opening 224 and is assembled on the central partition 22.

It can be understood that the assembling ring 223 surrounds and forms a space for accommodating the sounding element 10. Viewed from the direction of the vertical middle partition 22, the area of the opening 224 may be greater than or equal to or less than the space area enclosed by the assembly ring 223. That is, the size of the space enclosed by the opening 224 and the assembly ring 223 can be set arbitrarily, as long as it satisfies that the space enclosed by the opening 224 and the assembly ring 223 overlaps in the plane projection direction enclosed by the assembly ring 223. That is, after the passive radiating element 30 is fixedly assembled on the assembling ring 223, the projection of the passive radiating element 30 on the sounding element 10 at least partially overlaps the sounding element 30. At this time, a part of the sounding element 30 faces the passive radiating element 30, and the other part of the sounding element 30 faces the sound channel 201, so that the passive radiating element 30 can improve the low frequency effect and effectively achieve the purpose of directly facing the high sound.

Optionally, the passive radiating element 30 may be made of a flexible material, such as silica gel, non-woven gauze, or waterproof and breathable membrane. Compared with rigid materials such as hard plates, the flexible passive radiating element 30 can reduce the acoustic resistance, so that the diaphragm vibration of the sound element 10 is more balanced, thereby reducing the probability of distortion of the diaphragm of the sound element 10, and also reducing The pressure difference between the first chamber 202 and the second chamber 203 functions as a pressure relief hole, and the passive radiator 30 can also play a waterproof role, thereby reducing the entry of water and other liquids into the second chamber 203 The probability.

Referring to FIG. 5 together, the middle partition 22 may further include a first partition 221 and a second partition 222. The first partition board 221 is connected to the second partition board 222. For example, the first partition board 221 and the second partition board 222 may be integrally formed or separately fixedly connected. A part of the assembling ring 223 is connected with the first partition plate 221 and the other part is connected with the second partition plate 222. The assembling ring 223 may be a curved plate, so that it may be enclosed in a ring-shaped space. The end surface of the assembly ring 223 is at least partially connected to the side surface of the first partition plate 221, and the outer peripheral surface of the assembly ring 223 can be connected to the side wall of the second partition plate 222. The first partition plate 221 may be provided with an opening 224. Wherein, the first partition plate 221 and the second partition plate 222 are spaced apart in a direction perpendicular to the sounding element 10. It can be understood that the first partition board 221 and the second partition board 222 are arranged in a stepped manner. In the above manner, it can be realized that the passive radiation element 30 is at least partially facing the sound element 10.

In some embodiments, continuing to refer to FIG. 3, the housing 20 may further include a first cover 23 and a second cover 24. The first cover 23 faces away from the sounding direction of the sounding element 10 and is connected to the surrounding wall 21, combined with Figure 1, Figure 4, Figure 5 and Figure 6, the first cover 23 and the first partition plate 221, the second partition plate 222 are spaced apart to form a third chamber 204. The second cover plate 24 faces the sounding direction of the sounding element 10 and is connected to the surrounding wall 21. In addition, the second cover plate 24 and the second partition plate 222 are spaced apart to form a fourth cavity 205. The third chamber 204 communicates with the fourth chamber 205 to form the second chamber 203. It can be understood that a through hole 225 is provided on the first partition plate 221, and the third chamber 204 and the fourth chamber 205 pass through the through hole. 225 is connected, so that the third chamber 204 and the fourth chamber 205 can be coupled into a closed second chamber 203. The second cover plate 24 and the second partition plate 222 are spaced apart to form a fifth cavity 206. The fifth cavity 206 communicates with the sound outlet channel 201 and the first cavity 202, and the portion of the second cover plate 24 corresponding to the fifth cavity 206 may be provided with a first sound outlet 243. The third chamber 204 may be larger than the fourth chamber 205 and the fifth chamber 206, so that the sound pressure of the third chamber 204 may be greater than the sound pressure of the fourth chamber 205, so that the third chamber 205 can be The air vibration in the chamber 204 is coupled to the fourth chamber 205 inversely.

It can be understood that the second cover plate 24 can be a complete plate, and a first sound hole 243 is provided in a part corresponding to the fifth cavity 206. The number of the first sound outlet 243 may be multiple, and the first sound outlet 243 may be arranged in an array. The fifth cavity 206 further increases the sounding space of the sounding element 10, and can emit sound through the first sounding hole 243, thereby further reducing sound loss, improving the bass effect, and further improving the sound quality.

Of course, in some embodiments, referring to FIG. 1, the fourth chamber 205 may be infinitely small, so that the through hole 225 and the opening 224 can be combined into one, and the second chamber 203 may have only one third chamber. 204. The passive radiator 30 can be used to invert the air vibration of the second chamber 204 to the first chamber 202.

Optionally, continuing to refer to FIGS. 5 and 6, the area of the first partition board 221 may be larger than the area of the second partition board 222. The distance between the second partition plate 222 and the second cover plate 24 is greater than the distance between the first partition plate 221 and the second cover plate 24. It can be understood that in the direction perpendicular to the first partition plate 221 or the second partition plate 222, the depth of the fifth chamber 206 may be greater than the depth of the fourth chamber 205, so that at least part of the first chamber 202 can be The three-chamber 204 and the fourth chamber 205 are sandwiched, thereby improving the low-frequency effect.

In some embodiments, continuing to refer to FIG. 3, the first housing 20 may further include a beam 25 which is located in the sounding direction of the sounding element 10. 5 and 6 together, the cross beam 25 can be arranged between the first partition board 221 and the second partition board 222, the cross beam 25 plays a very good support to connect the first partition board 221 and the second partition board 222 effect. The second cover plate 24 may also include a sealing plate 241 and a sounding plate 242. The sealing plate 241 is connected with the surrounding wall 21 and the cross beam 25 to form the third cavity 204. The sound board 242 is connected with the surrounding wall 21 and the cross beam 25 to form a fifth cavity 206. A plurality of first sound holes 243 may be provided on the sound board 242. It can be understood that the second cover plate 24 can be separately connected, and the beam 25 can serve to fix the connection between the sealing plate 241 and the sounding plate 242, and the above method can facilitate the assembly and subsequent maintenance of the acoustic radiation assembly 100 .

Optionally, continuing to refer to FIG. 5, the end of the beam 25 may be provided with a first adapting portion 251, the surrounding wall 21 may be provided with a second adapting portion 211, and the outer edge of the sealing plate 241 and the first adapting portion 251 may be provided. , The second adapting part 211 is connected, and the outer edge of the sound output plate 242 is connected with the first adapting part 251 and the second adapting part 211. The connection method can be glue bonding or clamping. It can be understood that the first adapting portion 251 may be a “convex” structure or a stepped structure, and the second adapting portion 211 may be a “L”-shaped structure or a stepped structure. Of course, a second adapting portion 211 can also be provided at the connection between the surrounding wall 21 and the first cover 23. The first partition plate 221 may also be provided with a third adapting portion (not shown in the figure), the third adapting portion may be a stepped boss formed around the opening, etc., and the passive radiating element 30 may be plate-shaped or Sheet shape etc., thereby making the structure of the overall acoustic radiation assembly 100 more compact. The outer edge of the passive radiating element 30 is connected to the third adapting part. Through the above method, the height of the acoustic radiation component 100 can be effectively reduced, which is conducive to the design of miniaturized size, and can also make the connection of each connection more solid, and can form a good seal, which can effectively prevent sound leakage and acoustic short circuit.

In some embodiments, referring to FIG. 4 together, the acoustic radiation component 100 may further include an inverted tube 40. The inverter tube 40 is disposed on the first partition plate 221 and faces one side of the third chamber 205. The inverter tube 40 communicates with the third chamber 204 and the fourth chamber 205 through the through hole 225, and the inverter tube 40 is used for coupling with the passive radiating element 30 to achieve phase inversion of sound. It can be understood that the air vibration in the second chamber 203 can be reversed by 180° through the interaction of the inverting tube 40 and the passive radiating element 30. The inverting tube 40 may be vertical or L-shaped, and of course it may also have any other structure, as long as it can be coupled with the passive radiating element 30 to achieve a 180° sound phase inversion. Through the above method, the passive radiating element 30 and the inverting tube 40 can be coupled together to realize the sound phase inversion by 180°, and because part of the sounding element 10 faces the sound channel 201 and the other part faces the passive radiating element 30, Enhance the low-frequency effect and achieve the purpose of directing the treble, and can also increase the loudness of the sound.

Optionally, referring to FIG. 6, the first partition plate 221 may further be provided with a fourth adapting portion 226, and the fourth adapting portion 226 may be a convex truncated cone or a cylinder. The fourth adapting portion 226 corresponds to the through hole 225 and extends toward one side of the third chamber 204. By providing the fourth adapting portion 226, a good sealing connection with the inverter tube 40 can be achieved, and distortion can be effectively reduced.

Optionally, there may be a plurality of inverter tubes 40, and the plurality of inverter tubes 40 are arranged on the central partition 22 at intervals. The above-mentioned method can further improve the efficiency of the inversion, and can also reduce the distortion in the coupling process, which is beneficial to The loudness of the sound is increased, and the sound quality of the acoustic radiation component 100 can be improved.

In some embodiments, there may be multiple assembling rings 223 and sounding elements 10, there may be one passive radiating element 30, and one passive radiating element 30 covers the opening 224 and straddles the plurality of sounding elements 10. It can be understood that when one passive radiating element 30 is used, the passive radiating element 30 at least partially corresponds to the multiple vocal elements 10 on the projection of the multiple vocal elements 10 at the same time, and a larger and stronger sound field can be obtained through the above-mentioned method, and The low-frequency effect of the acoustic radiation component 100 can be made better, and the high-frequency sound effect can be clearer, and the sound quality of the acoustic radiation component 100 can be further improved.

In some embodiments, referring to FIG. 7, the surrounding wall 21 may also be provided with a second sound outlet 207. The second sound outlet 207 is located adjacent to the sound channel 201, and the second sound outlet 207 is connected to the fifth sound outlet. Chamber 206. The arrangement of the second sound hole 207 may be the same as the arrangement of the first sound hole 243. It can be understood that the second sound outlets 207 are provided on both sides of the surrounding wall 21 to emit sound, so that the sound generated by the acoustic radiation component 100 can propagate in multiple directions, and the acoustic radiation component 100 can generate a multi-dimensional three-dimensional Sound effects.

In the following, related tests are performed on the acoustic radiation component 100 in this application and the acoustic radiation component in the prior art through software testing. It should be noted that the environmental factors (humidity, temperature, etc.) of the two comparative acoustic radiation components are the same.

Please refer to FIG. 8. FIG. 8 is a comparison diagram of the frequency response curve of the acoustic radiation component 100 of this application and the acoustic radiation component in the prior art in the acoustic performance test. The solid line corresponds to the existing acoustic radiation component, and the dashed line corresponds to the acoustic radiation of the present application. As shown in FIG. 8, the loudness of the component 100 is significantly improved compared to the acoustic radiation component of the prior art, especially in the range of 400Hz-4kHz.

Please refer to FIG. 9. FIG. 9 is a comparison diagram of the impedance curve of the acoustic radiation component 100 of this application and the acoustic radiation component in the prior art in the acoustic performance test, wherein the solid line corresponds to the existing acoustic radiation component, and the dashed line corresponds to the acoustic radiation component of this application 100. It can be drawn from FIG. 9 that the prior art acoustic radiation component 100 has only one peak, while the acoustic radiation component 100 of the present application has two resonance points (at 400 Hz and 600 Hz), that is, the acoustic radiation component 100 of the present application has Two sound cavities, which can resonate with double cavities and realize the function of phase inversion.

Referring to FIG. 10, the present application also provides a sound emitting device 200, which includes a driving circuit 210 and the acoustic radiation component 100 as described in any of the above embodiments connected to the driving circuit 210. Among them, the sound-producing device 200 may be a sound-producing device such as a speaker, a mobile phone, a walkie-talkie, a smart wearable watch capable of sounding, and a navigator. For the specific content of the acoustic radiation component 100, reference may be made to the description of any of the foregoing embodiments, and details are not described herein again.

The above are only implementations of this application, and do not limit the scope of this application. Any equivalent structure or equivalent process transformation made by using the description and drawings of this application, or directly or indirectly applied to other related technologies In the same way, all fields are included in the scope of patent protection of this application.

Claims

An acoustic radiation component, characterized in that it comprises:

Pronunciation pieces;

A casing for accommodating and assembling the sound-producing piece, the casing is provided with a sound-emitting channel, and the sound-emitting channel is located on the front side of the sounding direction of the sound-producing piece;

The passive radiating element is housed and assembled in the housing, and the passive radiating element is located on the front side of the sounding direction of the sounding element and on the side of the sounding channel. There is a gap between the components to form a first cavity, the first cavity is in communication with the sound outlet channel, and there is a gap between the side of the passive radiating member facing away from the sounding member and the housing, There is a gap between the side of the sound element facing away from the passive radiating element and the housing to form a second cavity, wherein the sound element is at least partially facing the sound outlet channel along the sound emitting direction, so The sound element at least partially faces the passive radiation element along the sound direction.
The acoustic radiation assembly according to claim 1, wherein the housing further comprises a surrounding wall and a central partition, the central partition is connected to the surrounding wall, and an assembly ring is provided on the central partition And an opening, the opening at least partially overlaps the space enclosed by the mounting ring in the projection direction, the mounting ring is used to assemble the sound element, the passive radiating member covers the opening and is mounted on the On the middle partition.
The acoustic radiation assembly according to claim 2, wherein the middle partition further comprises a first partition plate and a second partition plate, the first partition plate is connected to the second partition plate, and the assembly One part of the ring is connected to the first partition plate, and the other part is connected to the second partition plate. The first partition plate is provided with the opening, wherein the first partition plate and the second partition plate are Spaced in the direction perpendicular to the sounding pieces.
The acoustic radiation assembly according to claim 3, wherein the housing further comprises a first cover plate and a second cover plate, and the first cover plate faces away from the sounding direction of the sounding element and is connected to the surrounding Connected to the wall, the first cover plate is spaced from the first partition plate and the second partition plate to form a third chamber, and the second cover plate faces the sounding direction of the sound element and is connected to the surrounding wall Connected, and the second cover plate and the second partition plate are spaced apart to form a fourth chamber, the third chamber communicates with the fourth chamber to form the second chamber, the The second cover plate is spaced from the second partition plate to form a fifth chamber. The fifth chamber communicates with the sound channel and the first chamber. The second cover plate corresponds to the first chamber. A part of the five chamber is provided with a first sound outlet.
The acoustic radiation assembly according to claim 4, wherein the area of the first partition plate is greater than the area of the second partition plate, and the distance between the second partition plate and the second cover plate is greater than that of the second cover plate. The distance between the first partition plate and the second cover plate.
The acoustic radiation assembly according to claim 5, wherein the first housing further comprises a beam, the beam is located in the sounding direction of the sounding element, and the beam is disposed on the first partition plate and the Between the second partition plates, the second cover plate may further include a sealing plate and a sound output plate. The sealing plate is connected with the surrounding wall and the cross beam to form the third cavity. The board is connected with the surrounding wall and the beam to form the fifth cavity, and the sound board is provided with a plurality of the first sound outlet holes.
The acoustic radiation assembly according to claim 6, wherein the end of the beam is provided with a first adapting portion, the surrounding wall is provided with a second adapting portion, and the outer edge of the sealing plate is The first fitting part and the second fitting part are connected, and the outer edge of the sound board is connected with the first fitting part and the second fitting part.
The acoustic radiation assembly according to claim 4, wherein the acoustic radiation assembly further comprises an inverting tube, the inverting tube is arranged on the first partition plate, and the inverting tube communicates with the first partition plate. In the third chamber and the fourth chamber, the inverting tube is used for coupling with the passive radiating element to realize the phase inversion of sound.
The acoustic radiation assembly according to claim 8, wherein there are multiple inverter tubes, and the plurality of inverter tubes are arranged at intervals.
The acoustic radiation assembly according to claim 4, wherein there are multiple assembling rings and sounding elements, one passive radiating element, and one passive radiating element covering the opening and extending horizontally. Across a plurality of said pronunciation pieces.
The acoustic radiation assembly according to claim 4, wherein a second sound outlet hole is further provided on the surrounding wall, and the second sound outlet hole is located adjacent to the first sound outlet hole. The second sound outlet communicates with the fifth chamber.
The acoustic radiation assembly according to claim 3, wherein a third adapting part is further provided on the first partition plate, and the outer edge of the passive radiating element is connected with the third adapting part, The passive radiating element is plate-shaped or sheet-shaped.
The acoustic radiation assembly according to claim 1, wherein the passive radiation element is a flexible waterproof material.
A sound generating device, characterized in that the sound generating device includes:

The driving circuit is connected to the acoustic radiation component; wherein the acoustic radiation component further includes:

The pronunciation piece is connected with the driving circuit;

A housing for accommodating and assembling the driving circuit and the sounding element, the housing is provided with a sounding channel, and the sounding channel is located on the front side of the sounding direction of the sounding member;

The passive radiating element is housed and assembled in the housing, and the passive radiating element is located on the front side of the sounding direction of the sounding element and on the side of the sounding channel. There is a gap between the components to form a first cavity, the first cavity is in communication with the sound outlet channel, and there is a gap between the side of the passive radiating member facing away from the sounding member and the housing, There is a gap between the side of the sound element facing away from the passive radiating element and the housing to form a second cavity, wherein the sound element is at least partially facing the sound outlet channel along the sound emitting direction, so The sound element at least partially faces the passive radiation element along the sound direction.
The sound generating device according to claim 14, wherein the housing further comprises a surrounding wall and a central partition, the central partition is connected to the surrounding wall, and an assembly ring and a central partition are provided on the central partition. The opening at least partially overlaps the space enclosed by the assembly ring in the projection direction, the assembly ring is used to assemble the sound element, and the passive radiating element covers the opening and is assembled in the middle On the partition.
The sounding device according to claim 15, wherein the central partition further comprises a first partition plate and a second partition plate, the first partition plate is connected to the second partition plate, and the assembly ring One part is connected to the first partition board, and the other part is connected to the second partition board. The first partition board is provided with the opening, wherein the first partition board is perpendicular to the second partition board. The sounding pieces are spaced apart in the direction.
The sounding device according to claim 16, wherein the housing further comprises a first cover plate and a second cover plate, the first cover plate facing away from the sounding direction of the sounding element and being connected to the surrounding wall Connected, the first cover plate is spaced apart from the first partition plate and the second partition plate to form a third chamber, and the second cover plate faces the sounding direction of the sounding element and is connected to the surrounding wall , And the second cover plate and the second partition plate are spaced apart to form a fourth chamber, the third chamber communicates with the fourth chamber to form the second chamber, the first The two cover plates are spaced from the second partition plate to form a fifth chamber. The fifth chamber communicates with the sound channel and the first chamber. The second cover plate corresponds to the fifth chamber. A part of the cavity is provided with a first sound outlet.
The sounding device according to claim 17, wherein the area of the first partition plate is greater than the area of the second partition plate, and the distance between the second partition plate and the second cover plate is greater than that of the second cover plate. The distance between the first partition plate and the second cover plate, the first housing further includes a beam, the beam is located in the sounding direction of the sound element, and the beam is arranged on the first partition plate and the second cover plate. Between the two partition plates, the second cover plate may further include a sealing plate and a sound output plate, the sealing plate is connected with the surrounding wall and the beam to form the third chamber, the sound output plate It is connected with the surrounding wall and the cross beam to form the fifth cavity, and the sound outlet plate is provided with a plurality of the first sound outlet holes.
The sounding device according to claim 18, wherein the end of the beam is provided with a first adapting portion, the surrounding wall is provided with a second adapting portion, and the outer edge of the sealing plate and the The first adapter portion and the second adapter portion are connected, the outer edge of the sound board is connected with the first adapter portion and the second adapter portion, and the first partition board is also provided There is a third adapting part, the outer edge of the passive radiating element is connected with the third adapting part, and the passive radiating element is plate-shaped or sheet-shaped.
The sounding device according to claim 17, wherein the sounding device further comprises an inverting tube, the inverting tube is arranged on the first partition plate, and the inverting tube is connected to the third cavity Chamber and the fourth chamber, the inverting tube is used to couple with the passive radiating element to realize the phase inversion of the sound, the passive radiating element is made of flexible waterproof material, the assembly ring, the sounding element The number of the passive radiating element is one, one of the passive radiating elements covers the opening and straddles the plurality of the sounding elements, the surrounding wall is also provided with a second sound outlet, the The second sound outlet hole is located adjacent to the first sound outlet hole, and the second sound outlet hole communicates with the fifth cavity.