WO2021237787A1

WO2021237787A1 - Sounding device

Info

Publication number: WO2021237787A1
Application number: PCT/CN2020/094696
Authority: WO
Inventors: 吴树文; 曹成铭
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2020-05-29
Filing date: 2020-06-05
Publication date: 2021-12-02
Also published as: CN212628367U

Abstract

The present utility model provides a sounding device, the sounding device comprises a housing having an accommodating space and a sound production monomer. The sound production monomer comprises a diaphragm, and the housing comprises a base and a rear housing; the base comprises a base plate and a base extension wall, and the rear housing comprises a rear housing plate and a rear housing extension wall, wherein the rear housing extension wall abuts against the base extension wall; a sealing member is arranged at the joint between the rear housing extension wall and the base extension wall and is glued and fixed to the base and the rear housing to realize a sealing effect; the base is provided with a sounding hole penetrating through the base, and the sounding hole is in communication with the diaphragm; the rear housing plate, the rear housing extension wall, the base extension wall and the sounding unit jointly enclose a rear sound cavity, and the rear housing is provided with a leakage hole, which communicates the rear sound cavity with the outside. Compared with the prior art, the sounding device in the present utility model is simple in structure, good in sealing performance, excellent in acoustic performance and good in user experience effect.

Description

Sound device

Technical field

The utility model relates to the field of electro-acoustic conversion, in particular to a sound-producing device applied to portable mobile electronic products.

Background technique

Sounding devices, also known as speakers, are widely used in portable mobile electronic products, such as mobile phones, to convert audio signals into sound for playback. The sounding devices have high loudness and amplitude.

The related art sounding device includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system with a magnetic gap. The magnetic circuit system drives the vibration system to vibrate and produce sound, and the vibration system includes The diaphragm of the basin frame and a voice coil fixed to the diaphragm and inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound.

technical problem

However, because the related art sound device does not have a rear cavity structure or the rear cavity is an open structure, when used in portable mobile electronic products such as mobile phones, it will cause the problem of mobile phone shell vibration, resulting in poor user experience; and mobile phone space Due to the limited size, the sound emitting device cannot be designed into a speaker box structure with a back cavity in the prior art to overcome this problem. In addition, the sound-generating device of the related art has poor airtightness, thereby affecting the acoustic performance of the sound-generating device.

Therefore, it is necessary to provide a new sound generating device to solve the above technical problems.

Technical solutions

The purpose of the utility model is to provide a sound device with simple structure, good sealing performance, better acoustic performance and good user experience.

In order to achieve the above-mentioned objective, the present invention provides a sound emitting device, which includes a housing with a housing space and a sound emitting monomer housed in the housing, and the sound emitting monomer includes a diaphragm for vibrating and sounding. The housing includes a base and a rear housing respectively covered on opposite sides of the sound-producing monomer along the vibration direction of the diaphragm;

The base includes a base plate that is covered and fixed on a side of the sounding unit close to the diaphragm, and the outer periphery of the base plate is bent in a direction away from the diaphragm along the circumferential side of the sounding unit Extended base extension wall;

The rear shell includes a rear shell plate located on a side of the sound emitting unit away from the base plate and spaced from the sound emitting unit, and a peripheral edge of the rear shell plate is approached along the circumferential side of the sound emitting unit A rear shell extension wall bent and extended in the direction of the base extension wall, and the rear shell extension wall abuts against the base extension wall;

The sound emitting device further includes a sealing element, the sealing element is arranged at the connection between the extension wall of the rear shell and the extension wall of the base and is simultaneously glued and fixed with the base and the rear shell to form a seal;

The base is provided with a sound hole penetrating therethrough, the sound hole is in communication with the diaphragm, and the rear shell plate, the rear shell extension wall, the base extension wall and the sound monomer are jointly enclosed In the rear acoustic cavity, the sound-producing monomer is provided with a leakage part communicating with the rear acoustic cavity, and the rear shell is provided with a leakage hole, and the leakage hole connects the rear acoustic cavity with the outside.

Preferably, the sealing element is partially or completely sandwiched between the extension wall of the base and the extension wall of the rear shell, and the sealing element is elastically deformed.

Preferably, it is arranged outside the accommodating space and attached to the connection between the extension wall of the base and the extension wall of the rear shell.

Preferably, the sound-producing unit includes a basin frame, a vibration system respectively supported and fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound, and the thickness of the shell is smaller than the thickness of the basin frame.

Preferably, the ratio of the thickness of the shell to the thickness of the basin frame is less than 0.4.

Preferably, the base extension wall and/or the rear shell extension wall are attached to the basin frame, or the base extension wall and/or the rear shell extension wall and at least one side of the basin frame are provided There is an interval, and the interval is less than 3 times the thickness of the casing.

Preferably, the housing is made of metal material.

Preferably, the housing is at least partially grounded.

Preferably, the sound generating device further includes a conductive member, one end of the conductive member is electrically connected to the housing, and the other end of the conductive member is used for grounding.

Preferably, the conductive member is formed by extending the housing.

Preferably, the sound emitting device further includes a conductive member, the conductive member includes two electrical pathways, one of the electrical pathways is used to connect the sounding monomer with an external electrical signal, and the other of the electrical pathways Used to connect the shell and the ground.

Preferably, the sound emitting device further includes at least two positioning pieces, the two positioning pieces are connected to opposite sides or two diagonal corners of the casing, and the positioning piece is provided with one end away from the casing Through the positioning hole on it.

Preferably, the positioning piece is formed by extending outward from the casing.

Preferably, the shell is made of a 0.15mm thick steel sheet.

Preferably, the sound-producing unit further includes a front cover arranged on the side of the basin frame close to the diaphragm, the front cover, the base and the diaphragm collectively enclose a front sound cavity, and the front The cover is provided with a through hole passing through it along the vibration direction, and the through hole connects the front acoustic cavity with the outside.

Preferably, the sound emitting device further includes a front cover arranged on a side of the basin frame close to the diaphragm, the front cover, the base and the diaphragm collectively enclose a front sound cavity, and the front cover Is provided with a through hole penetrating through it along the vibration direction, and the through hole connects the front acoustic cavity with the outside; The front cover passes through the sound hole and is exposed on the base.

Preferably, the sound generating device further includes a breathable damping member attached to the front cover, and the breathable damping member completely covers the through hole.

Preferably, the sound-emitting device includes a sound-guiding shell covering a side of the sound-emitting monomer away from the rear shell, the sound-guiding shell having a sound-guiding cavity forming a side sound-emitting structure, and the sound-guiding cavity and the vibration The membrane is connected.

Preferably, the housing and the sound-emitting monomer also enclose a sound-guiding cavity forming a side sound-emitting structure, and the sound-guiding cavity is in communication with the diaphragm.

Preferably, the sound emitting device further includes a gas permeable isolator located in the rear acoustic cavity, and the gas permeable isolator is attached to the sound emitting monomer and separates the sound emitting unit from the rear acoustic cavity.

Preferably, the sound generating device further includes a gas-permeable spacer located in the rear acoustic cavity, and the gas-permeable spacer includes a spacer body arranged opposite to the rear shell at intervals, and is directed from the periphery of the spacer body to the A spacer extension part bent and extended in the direction of the rear shell and a spacer fixing part bent and extended from an end of the spacer extension part away from the spacer body; the spacer extension part is spaced from the rear shell extension wall It is provided that the spacer fixing part is fixed to the rear shell; the air-permeable spacer and the rear shell jointly enclose a powder filling space.

Preferably, a side of the isolator body close to the sounding unit is recessed in a direction away from the sounding unit to form an avoiding step, and the avoiding step is arranged directly opposite to the leakage portion.

Preferably, the area ratio of the orthographic projection of the sound-emitting monomer to the rear shell along the vibration direction of the diaphragm to the rear shell is at least 2/3.

Preferably, the interval is less than or equal to 1/3 of the width of the fixed surface of the diaphragm fixed to the basin frame.

Beneficial effect

Compared with the related art, in the sound device of the present invention, the base and the rear shell are designed to cover the opposite sides of the basin frame, and the rear shell plate, the rear shell extension wall, and the The extension wall of the base and the sounding monomer jointly enclose a rear sound cavity, the rear housing is provided with a leak hole to communicate the rear sound cavity with the outside, and the sounding device further includes a sealing element which is arranged on the rear housing to extend The connection between the wall and the extension wall of the base and at the same time is glued and fixed with the base and the rear shell to form a seal. The above-mentioned structure forms a sealed rear acoustic cavity structure, which is not only simple in structure, and small in overall size, but also makes the sound device The acoustic effect is better, and the sealed rear acoustic cavity structure enables the sound emitting device to avoid the occurrence of shell vibration after being applied to the mobile terminal, so that the user experience effect is better. On the other hand, the arrangement of the above structure further improves the sealing performance of the base and the rear case.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present utility model more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present utility model. For example, for those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention;

Figure 2 is an exploded schematic diagram of the three-dimensional structure of the sound device of the present invention;

Fig. 3 is a schematic view of a three-dimensional structure of the sound device of the present invention from another perspective;

Figure 4 is a cross-sectional view taken along line A-A in Figure 1;

Fig. 5 is a three-dimensional structural diagram of an embodiment of adding conductive elements of the sound generating device of the present invention;

FIG. 6 is a schematic diagram of a three-dimensional structure of another derivative embodiment of FIG. 5;

FIG. 7 is a schematic diagram of a three-dimensional structure of another embodiment of adding conductive elements of the sound device of the present invention; FIG.

Fig. 8 is an exploded schematic view of a part of the three-dimensional structure of Fig. 7;

FIG. 9 is a schematic structural diagram of an embodiment in which the housing of FIG. 4 forms a side sounding structure;

Fig. 10 is a schematic structural diagram of the sound generating device shown in Fig. 4 added with a breathable spacer;

FIG. 11 is a schematic diagram of another embodiment structure of the air-permeable spacer in the embodiment shown in FIG. 10;

FIG. 12 is a schematic structural diagram of a derivative embodiment of the embodiment shown in FIG. 11;

FIG. 13 is a schematic structural diagram of an embodiment in which a positioning piece is added to the sound generating device shown in FIG. 1; FIG.

FIG. 14 is a schematic structural diagram of a derivative embodiment of the embodiment shown in FIG. 13.

Embodiments of the present invention

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

Please refer to FIGS. 1-4 at the same time. The present invention provides a sound emitting device 100, which includes a housing 1 with a receiving space and a sound emitting monomer 2 housed in the housing 1.

The sound unit 2 includes a basin frame 21, a vibration system 22, a magnetic circuit system 23 and a leakage part 24.

The vibration system 22 and the magnetic circuit system 23 are respectively supported and fixed to the basin frame 21 and jointly enclose a sounding cavity 103. The magnetic circuit system 23 drives the vibration system 22 to vibrate and produce sound.

The vibration system 22 includes a diaphragm 221 fixed to the basin frame 21, and the diaphragm 221 is used for vibrating and sounding.

In this embodiment, the thickness of the shell 1 is smaller than the thickness of the basin frame 21. Preferably, the shell 1 is made of a 0.15mm thick steel sheet, which effectively reduces shell vibration.

The housing 1 includes a base 11 and a rear shell 12 respectively covering two opposite sides of the sound emitting unit 2 along the vibration direction of the diaphragm 221. In this embodiment, the ratio of the thickness of the shell 1 to the thickness of the basin frame 21 is less than 0.4, so that while the structural strength of the shell 1 is satisfied, the size of the sound emitting device 100 along the direction perpendicular to the vibration direction is increased as little as possible. ; Moreover, the structural strength of the basin frame 21 is guaranteed while occupying as little space as possible.

The base 11 includes a base plate 111 that is covered and fixed on the side of the sounding unit 2 away from the rear shell 12, and the outer periphery of the base plate 111 is far away from the sounding unit 2 along the circumferential side of the sounding unit 2. The base extension wall 112 is bent and extended in the direction of the diaphragm 221.

The rear shell 12 includes a rear shell 121 located on a side of the sound emitting unit 2 away from the base plate 111 and spaced from the sound emitting unit 2, and a rear shell 121 along the periphery of the rear shell 121 The rear shell extension wall 122 of the single body 2 is bent and extended in the direction close to the base 11. The rear shell extension wall 122 abuts against the base extension wall 112.

The base extension wall 112 and/or the rear shell extension wall 122 are attached to the basin frame 21, or the base extension wall 112 and/or the rear shell extension wall 122 and at least the basin frame 21 One side is provided with a gap, and the gap is less than 3 times the thickness of the casing. The arrangement of the interval can make the sound emitting unit 2 be assembled into the housing 1 more quickly, improve the assembly efficiency, and at the same time, will not occupy more lateral space occupied by the sound emitting device 100 perpendicular to the vibration direction. In addition, the above-mentioned interval can also be used to increase the volume of the rear acoustic cavity 102 and further improve the acoustic performance. Specifically, in this embodiment, the interval is less than or equal to the fixed surface of the diaphragm 221 (glued). 1/3 of the width of the surface).

The sounding device 100 further includes a sealing member 3, which is arranged at the connection between the rear shell extension wall 122 and the base extension wall 112 and is glued and fixed to the base 11 and the rear shell 12 at the same time. Form a seal. The arrangement of this structure further improves the sealing performance of the base 4 and the rear shell 5, and further improves the acoustic performance of the sound emitting device 100.

Specifically, in this embodiment, the sealing member 3 is disposed outside the receiving space and attached to the connection between the base extension wall 112 and the rear housing extension wall 122. Of course, it is not limited to this. Alternatively, the sealing element 3 is partially or completely sandwiched between the base extension wall 112 and the rear shell extension wall 122, and the sealing element 3 is elastically deformed. Both of these two methods can further improve the sealing performance of the base 11 and the rear shell 12, and the position of the sealing member 3 can be set according to actual conditions.

The base 11 is provided with a sound hole 113 passing through it, and the sound hole 113 communicates with the diaphragm 221 for sound. The rear shell panel 121, the rear shell extension wall 122, the base extension wall 112 and the sound emitting unit 2 collectively enclose a rear acoustic cavity 102.

In this embodiment, the leakage portion 24 communicates with the rear acoustic cavity 102, so that the sound-emitting cavity 103 is communicated with the rear acoustic cavity 102 through the leakage portion 24 to improve low-frequency acoustic performance. The rear shell 12 is provided with a leakage hole 123, which communicates the rear acoustic cavity 102 with the outside, and is used to balance the sound pressure.

Further, the rear shell 121, the rear shell extension wall 122, the base extension wall 112, and the sound-producing monomer 2 collectively enclose a rear acoustic cavity 102, and the sealing member 3 is disposed on the rear shell extension The connection between the wall 122 and the base extension wall 112 is glued and fixed with the base 11 and the rear shell 122 at the same time, so that the rear acoustic cavity 102 is sealed. So far, the above-mentioned sound emitting device 100 of the present invention forms a closed rear acoustic cavity structure, which is simple in structure. On the one hand, it improves the acoustic performance of the sound emitting device 100, especially the low-frequency acoustic performance, and on the other hand, due to the existence of the rear acoustic cavity 102 structure The base 11 and the rear case 12 form a vibration absorbing effect, so that the sound-producing device 100 will not cause the mobile terminal and other electronic products to produce case vibration after being used in electronic products such as mobile terminals, which effectively increases the user experience effect of customers.

More preferably, the sound-producing unit 2 further includes a front cover 4 covering a side of the basin frame 21 close to the diaphragm 221, and the front cover 4, the base 11, and the diaphragm 221 share a common Surrounding the front acoustic cavity 101, the front cover 4 is provided with a through hole 41 penetrating the front cover 4 along the vibration direction, and the through hole 41 connects the front acoustic cavity 101 with the outside. In this embodiment, the front cover 4 is a part of the structure of the sound emitting monomer 2, that is, the sound emitting monomer 2 has its own front cover 4.

Alternatively, the front cover 4 may not be a part of the sound emitting unit 2, but a part of the sound emitting device 100. For example, the sound emitting device 100 may further include a cover provided on the side of the basin frame 21 close to the diaphragm 221. The front cover 4, the front cover 4, the base 11, and the diaphragm 221 collectively enclose a front acoustic cavity 101. The front cover 4 is provided with a through hole 41 penetrating the front cover 4 along the vibration direction, and the through hole 41 connects the front acoustic cavity 101 to the outside. This structural arrangement improves the mid-frequency and high-frequency performance of the sound emitting device 100. In this embodiment, the base 11 is pressed and fixed to a side of the front cover 4 away from the diaphragm 221, and the front cover 4 passes through the sound hole 113 and is exposed to the base 11.

In order to further improve the mid-frequency and high-frequency performance of the sound generating device 100, the sound generating device 100 further includes a breathable damping member 5 attached to the front cover 4, and the breathable damping member 5 completely covers the through hole 41. In order to prevent foreign objects from entering the front acoustic cavity 101, the damping of the air-permeable damping member 4 can be adjusted in the other direction to adjust the mid-frequency and high-frequency performance of the sound device.

In this embodiment, the through holes 41 include multiple and are arranged in an array to improve the stability and balance of sound generation.

In this embodiment, the housing 1 can be made of metal, glass, ceramics and other materials. Preferably, the housing 1 is made of metal materials, such as steel, iron, copper and the like. It can be designed to be thinner while satisfying the structural strength, thereby further reducing the lateral size of the sound emitting device 100 in the direction perpendicular to the vibration direction.

More preferably, the housing 1 is at least partially grounded, so as to form a shielding effect on the sounding monomer 2, reduce the interference effect of external signals on the sounding monomer 2, and improve reliability.

In this embodiment, the area ratio of the orthographic projection of the sounding monomer 2 to the rear housing 11 along the vibration direction of the diaphragm 221 to the rear housing 11 is at least 2/3. This structure can make the size of the sound generating device 100 perpendicular to the vibration direction as small as possible, which satisfies the requirements of forming the acoustic cavity 102 to achieve vibration absorption and improve low-frequency acoustic performance, and it is more convenient to install in products with small lateral dimensions in the assembly space.

More preferably, the sound generating device 100 further includes a gas-permeable spacer located in the rear acoustic cavity 102. When the rear acoustic cavity 102 is filled with sound-absorbing materials, such as sound-absorbing particles, the gas-permeable spacer effectively prevents the sound-absorbing particles. Entering into the space between the magnetic circuit system 23 and the vibration system 22 avoids the risk of sound failure and improves reliability.

Please refer to the figure shown in FIG. 5, which is a schematic diagram of the three-dimensional structure of the embodiment of adding conductive elements of the sound device of the present invention. In the sound generating device 300, the housing 301 is made of a metal material, such as steel, iron, copper, etc., for example, the housing 301 is made of a steel sheet with a thickness of 0.15 mm.

The housing 301 is made of a metal material and can be made thinner with the same structural strength, thereby further reducing the horizontal size of the sound emitting device 300 along the direction of vibration. The main difference from the embodiment shown in FIG. 1 is that: the embodiment also includes a conductive member 6.

Specifically, the sound emitting device 300 further includes a conductive member 6, one end of the conductive member 6 is connected to the housing 301, and the other end of the conductive member 6 is used for grounding, thereby forming a shielding effect, so that the sounding unit 300 avoids external electromagnetic interference and has better working reliability.

Please refer to FIG. 6, which is a schematic diagram of the three-dimensional structure of another derivative embodiment of FIG. The rear shell 4012 is formed by extending in a direction away from the basin frame, and is located on the outside of the housing 401.

Please refer to FIG. 7, which is a three-dimensional structure diagram of another embodiment of adding conductive elements of the sound device of the present invention. The difference between this embodiment and the embodiment shown in FIG. 5 lies in the structure and function of the conductive member.

Specifically, the sound emitting device 500 further includes a conductive member 506, and the conductive member 506 includes two mutually insulated electrical paths, one of the electrical paths is used to connect the sound emitting monomer 502 with an external electrical signal, It is used to supply power to the sound emitting unit 502, and the other electrical path is used to connect the housing 501 and the ground to form a shield for the sound emitting unit 502. In this embodiment, the conductive member 506 is used to form a shielding effect together with the housing 501, and is also used to supply power to the sound generating unit 502, which has a simpler structure and can achieve dual functions.

For example, the conductive member 506 has an FPC structure. Specifically, as shown in FIG. 8, the conductive member 506 includes a first arm 5061 that penetrates the base extension wall 50112 and/or the rear shell extension wall 50122 and extends from opposite ends of the first arm 5061 to the basin frame. A second arm 5062 extending in the direction of 5021, a third arm 5064 extending from the first wall 5061 in a direction away from the basin frame 5021, and a fourth arm 5064 extending from the first wall 5061 in a direction away from the basin frame 5021臂5064.

The first arm 5061 is electrically connected to the housing 501; the second arm 5062 is fixed to the basin frame 5021 and is electrically connected to the sound emitting unit 502 to supply power to the sound emitting unit 502; the third arm 5063 Used to connect external electrical signals; the fourth arm 5064 is used to ground. That is, the first arm 5061 and the fourth arm 5064 jointly connect the housing 501 to the ground to form an electrical path for shielding the sound emitting unit 502; the first arm 5061, the second arm 5062, and The third arm 5063 jointly realizes the electrical connection between the sound emitting unit 502 and the external electrical signal, and is realized as another electrical path through which the sound emitting unit 502 communicates with the external electrical signal.

As shown in FIG. 9, it is a schematic structural diagram of an embodiment in which side sound is formed on the basis of the embodiment shown in FIG. 4. That is to say, the sound-producing device forms a sound-producing structure from the front side.

Specifically, the sound-emitting device 100 includes a sound-conducting shell 14 covering a side of the sound-emitting unit 2 away from the rear shell 12, and the sound-conducting shell 14 has a sound-guiding cavity 30 forming a side sound-emitting structure. The sound guide cavity 30 is in communication with the diaphragm 221. The side sound structure can better guide the sound, which is convenient for use when the front sound is blocked, and the use flexibility is higher.

For example, the sound guide shell 14 and the diaphragm 221 jointly enclose a sound guide cavity 30. Specifically, the sound conducting shell 14 includes a sound conducting shell plate 141 spaced and opposed to the diaphragm 221, and a peripheral edge of the acoustic conducting shell plate 141 is bent and extended toward the sound emitting unit 2 and supported and fixed to the The sound-guiding shell extension wall 142 on the periphery of the sounding monomer 2 is provided with a sound-guiding hole 143 penetrating the sound-guiding shell extension wall 142 to form a side sounding structure, which is convenient for flexible use of different installation positions.

It should be noted that the communication between the sound guiding cavity 30 and the diaphragm 221 may be direct communication, or the diaphragm 221 may communicate with the sound guiding cavity 30 through the front acoustic cavity 101, which is easily understood by those skilled in the art. At this time, it is understood that the sound conducting shell 14 is a component of the sound emitting device 100 and does not belong to the housing 1.

When the sound conducting shell 14 is understood as a part of the shell 1, it is also feasible, that is, the sound conducting shell 14 may be a part of the shell 1. In this case, it is the shell 1 and the sound emitting monomer. 2 is also enclosed to form a sound guide cavity 30 forming a side sounding structure, and the sound guide cavity 30 is in communication with the diaphragm 221.

Please refer to FIG. 10, which is a schematic diagram of the structure of adding air-permeable spacers to the sound emitting device shown in FIG. 4. Specifically, the sound emitting device 100 further includes a gas-permeable isolator 7 located in the rear acoustic cavity 102, and the gas-permeable isolator 7 is attached to the sound monomer 2 and the sound monomer 2 is removed from the rear sound cavity. The acoustic cavity 102 is partitioned. When the rear acoustic cavity 102 is filled with sound-absorbing particles, the air-permeable spacer 7 prevents the sound-absorbing particles from entering the sound-producing monomer 2 and affecting its acoustic performance, thereby improving the reliability of sound production.

Please refer to FIG. 11, which is a schematic diagram of the specific structure of the air-permeable spacer in the embodiment shown in FIG. 10. The sound emitting device 600 further includes a gas-permeable isolator 607 located in the rear acoustic cavity 60102, and the gas-permeable isolator 607 includes an isolator body 6071 and a spacer body 6071 arranged opposite to the rear shell 6012. The spacer extension part 6072 whose periphery is bent and extended toward the rear shell 6012 and the spacer fixing part 6073 is bent and extended from an end of the spacer extension part 6072 away from the spacer body 6071.

The spacer extension 6072 is spaced apart from the rear shell extension wall 60122, and the spacer fixing part 6073 is fixed to the rear shell 6012; the air-permeable spacer 607 and the rear shell 6012 together form a powder filling Space 601. Wherein, the structure in which the spacer extension 6072 and the rear shell extension wall 60122 are spaced apart can effectively increase the smoothness of ventilation of the rear acoustic cavity 60102 and improve the stability of low-frequency sound performance.

Please refer to FIG. 12, which is a schematic structural diagram of a derivative embodiment of the embodiment shown in FIG. 11. In the sounding device 700, the side of the isolator body 7071 close to the sounding unit 702 is recessed in a direction away from the sounding unit 702 to form an avoiding step 7074, and the avoiding step 7074 is in line with the leakage portion 7024. Pair set. This structural arrangement can make the leakage of the sounding cavity 7103 of the sounding monomer 702 smoother, thereby improving the sounding performance.

Please refer to FIG. 13, which is a schematic structural diagram of a derivative embodiment of the embodiment shown in FIG. 1. The sound emitting device 800 further includes at least two positioning pieces 8 which are connected to the housing 801 respectively. One end of the positioning piece 8 away from the housing 801 is provided with a positioning hole 81 penetrating through it, which is used to fix and position the sound emitting device 800 and the application terminal, such as a threaded hole. The hole 81 is fixed on the terminal device, which is simple and convenient, and the positioning sheet 8 is provided with at least two positioning sheets 8 to form a positioning fixation more effectively. In order to further improve the fixation stability, the two positioning pieces 8 are connected to opposite sides or two diagonal corners of the housing 801, and the symmetrical arrangement makes the sound generating device 800 and the whole terminal have a better positioning and fixation effect. In this embodiment, the positioning piece 8 is fixed to the housing 801 by welding, that is, the positioning piece 8 and the housing 801 are a separate structure of two devices.

Please refer to FIG. 14, which is a schematic structural diagram of a derivative embodiment of the embodiment shown in FIG. 13. The difference from the embodiment shown in FIG. 13 is that in the sound emitting device 900 in this embodiment, the positioning piece 908 is formed by extending outward from the housing 901, that is, the positioning piece 908 and the housing 901 are integrally formed The structure is simple to form, reduces the number of components, and improves assembly efficiency.

The above are only the embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these all belong to The scope of protection of the utility model.

Claims

A sounding device, comprising a housing with a containing space and a sounding monomer contained in the housing, the sounding monomer comprising a diaphragm for vibrating and sounding, and is characterized in that:

The housing includes a base and a rear housing respectively covering opposite sides of the sound-producing monomer along the vibration direction of the diaphragm;

The base includes a base plate that is covered and fixed on a side of the sounding unit close to the diaphragm, and the outer periphery of the base plate is bent in a direction away from the diaphragm along the circumferential side of the sounding unit Extended base extension wall;

The rear shell includes a rear shell plate located on a side of the sound emitting unit away from the base plate and spaced from the sound emitting unit, and a peripheral edge of the rear shell plate is approached along the circumferential side of the sound emitting unit A rear shell extension wall bent and extended in the direction of the base extension wall, and the rear shell extension wall abuts against the base extension wall;

The sound emitting device further includes a sealing element, the sealing element is arranged at the connection between the extension wall of the rear shell and the extension wall of the base and is simultaneously glued and fixed with the base and the rear shell to form a seal;

The base is provided with a sound hole penetrating therethrough, the sound hole is in communication with the diaphragm, and the rear shell plate, the rear shell extension wall, the base extension wall and the sound monomer are jointly enclosed In the rear acoustic cavity, the sound-producing monomer is provided with a leakage part communicating with the rear acoustic cavity, and the rear shell is provided with a leakage hole, and the leakage hole connects the rear acoustic cavity with the outside.
The sounding device according to claim 1, wherein the sealing element is partially or completely sandwiched between the extension wall of the base and the extension wall of the rear case, and the sealing element is elastically deformed.
The sounding device according to claim 1, wherein the sealing member is arranged outside the receiving space and attached to the connection between the extension wall of the base and the extension wall of the rear case.
The sound emitting device according to claim 1, wherein the sound emitting unit comprises a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound, and the shell The thickness of the body is smaller than the thickness of the basin frame.
The sound emitting device according to claim 4, wherein the ratio of the thickness of the shell to the thickness of the basin frame is less than 0.4.
The sounding device according to claim 4, wherein the base extension wall and/or the rear shell extension wall are attached to the basin frame, or the base extension wall and/or the rear shell extension A gap is provided between the wall and at least one side of the basin frame, and the gap is less than 3 times the thickness of the shell.
The sound emitting device according to claim 1, wherein the housing is made of metal material.
The sound emitting device according to claim 7, wherein the housing is at least partially grounded.
8. The sound generating device according to claim 7, wherein the sound generating device further comprises a conductive member, one end of the conductive member is electrically connected to the housing, and the other end of the conductive member is used for grounding.
The sound emitting device according to claim 9, wherein the conductive member is formed by extending the housing.
The sound emitting device according to claim 7, wherein the sound emitting device further comprises a conductive member, the conductive member includes two electrical paths, and one of the electrical paths is used to connect the sound emitting monomer and For external electrical signals, the other electrical path is used to connect the housing and the ground.
The sounding device according to claim 7, wherein the sounding device further comprises at least two positioning pieces, and the two positioning pieces are connected to opposite sides or two diagonal corners of the housing, and One end of the positioning piece away from the casing is provided with a positioning hole penetrating the top.
The sounding device according to claim 12, wherein the positioning piece is formed by extending outward from the casing.
The sound emitting device according to claim 1, wherein the shell is made of steel sheet with a thickness of 0.15 mm.
The sounding device according to claim 4, wherein the sounding unit further comprises a front cover arranged on a side of the basin frame close to the diaphragm, the front cover, the base, and the The diaphragms collectively enclose a front acoustic cavity, the front cover is provided with a through hole penetrating the front cover along the vibration direction, and the through hole connects the front acoustic cavity with the outside.
The sounding device according to claim 4, wherein the sounding device further comprises a front cover arranged on a side of the basin frame close to the diaphragm, the front cover, the base and the vibration The membranes collectively enclose a front acoustic cavity, the front cover is provided with a through hole penetrating therethrough along the vibration direction, and the through hole connects the front acoustic cavity with the outside; the base is pressed and fixed to the front cover The peripheral edge is away from the side of the diaphragm, and the front cover passes through the sound hole and is exposed to the base.
The sound emitting device according to claim 15 or 16, wherein the sound emitting device further comprises a breathable damping member attached to the front cover, and the breathable damping member completely covers the through hole.
The sound-emitting device according to claim 1, wherein the sound-emitting device comprises a sound-conducting shell covering a side of the sound-emitting monomer away from the rear shell, and the sound-conducting shell has a side sound-emitting structure. A sound guide cavity, the sound guide cavity is in communication with the diaphragm.
The sounding device according to claim 1, wherein the housing and the sounding monomer further enclose a sound guide cavity forming a side sounding structure, and the sound guide cavity is in communication with the diaphragm.
The sounding device according to claim 1, wherein the sounding device further comprises a gas-permeable isolator located in the rear acoustic cavity, and the gas-permeable isolator is attached to the sounding unit and the sounding unit The body is separated from the rear acoustic cavity.
The sounding device according to claim 1, wherein the sounding device further comprises a gas-permeable spacer located in the rear acoustic cavity, and the gas-permeable spacer comprises a spacer body arranged opposite to the rear shell, A spacer extension part bent and extended from the periphery of the spacer body in the direction of the rear shell, and a spacer fixing part bent and extended from one end of the spacer extension part away from the spacer body; the spacer The extension part of the element is spaced apart from the extension wall of the rear shell, and the spacer fixing part is fixed to the rear shell; the air-permeable spacer and the rear shell jointly enclose a powder filling space.
The sounding device according to claim 21, wherein the side of the isolator body close to the sounding unit is recessed in a direction away from the sounding unit to form an avoiding step, and the avoiding step and the leakage portion Set it right.
The sounding device according to claim 1, wherein the area ratio of the orthographic projection of the sounding monomer to the rear case along the vibration direction of the diaphragm to the rear case is at least 2/3.
The sound emitting device according to claim 6, wherein the interval is less than or equal to 1/3 of the width of the fixed surface of the diaphragm fixed to the basin frame.