CN212628376U

CN212628376U - Sound production device

Info

Publication number: CN212628376U
Application number: CN202020974114.7U
Authority: CN
Inventors: 吴树文; 曹成铭
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-02-26
Anticipated expiration: 2030-05-29
Also published as: WO2021237813A1

Abstract

The utility model discloses a sounding device, which comprises a shell with an accommodating space and a sounding monomer, wherein the sounding monomer comprises a vibrating diaphragm, and the shell comprises a base and a rear shell; the base comprises a base plate and a base extension wall; the rear shell comprises a rear shell plate and a rear shell extension wall; the shell also comprises a bearing arm and a flanging; the flanging and the bearing arms form a containing step together, and the base extending wall or the rear shell extending wall is contained in the step and is abutted against the bearing arms to be attached to the flanging to form sealing; the base is provided with a sounding hole which penetrates through the base, and the sounding hole is communicated with the vibrating diaphragm; the rear shell plate, the rear shell extension wall, the base extension wall and the sounding monomer are enclosed to form a rear sound cavity, and a leakage hole is formed in the rear shell and communicates the rear sound cavity with the outside. Compared with the prior art, the utility model discloses a positioning accuracy of vocal device is high, sealed effectual and acoustic performance is more excellent.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an acoustoelectric field especially relates to a sounding device.

[ background of the invention ]

The sound generating device is also called a loudspeaker, and is widely applied to portable mobile electronic products, such as mobile phones, so that an audio signal is converted into sound to be played, and the sound generating device has high loudness and vibration amplitude.

The sound production device of the related art includes the basin frame, is fixed in respectively the vibration system of basin frame and the magnetic circuit that has the magnetic gap, the magnetic circuit drive vibration system vibration sound production, vibration system is including being fixed in the vibrating diaphragm of basin frame and being fixed in vibrating diaphragm and inserting are located the magnetic gap is in order to drive the voice coil loudspeaker voice coil of vibrating diaphragm vibration sound production.

However, the sound generating device in the related art does not have a rear cavity structure or has an open rear cavity structure, and when the sound generating device is applied to portable mobile electronic products such as a mobile phone, the problem of vibration of the mobile phone shell is caused, so that the user experience effect is poor; however, the space size of the mobile phone is limited, and the sound production device cannot be designed into a loudspeaker box structure with a rear cavity in the prior art so as to overcome the problem. In addition, the assembly error between each component of the sound production device in the related art is large when the sound production device is installed, so that the sealing effect of the sound production device is poor, and the acoustic performance of the sound production device is further influenced.

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

[ Utility model ] content

An object of the utility model is to provide a positioning accuracy is high, sealed effectual and the more excellent vocal device of acoustic performance.

In order to achieve the above object, the present invention provides a sound generating device, which comprises a housing having an accommodating space and a sound generating unit accommodated in the housing, wherein the sound generating unit comprises a vibrating diaphragm for vibrating sound, and the housing comprises a base and a back shell respectively covering two opposite sides of the sound generating unit along a vibration direction of the vibrating diaphragm;

the base comprises a base plate and a base extension wall, wherein the base plate is fixedly covered on one side, close to the vibrating diaphragm, of the sound generating single body, and the base extension wall is bent and extended along the peripheral side direction of the sound generating single body away from the vibrating diaphragm from the outer peripheral edge of the base plate;

the rear shell comprises a rear shell plate and a rear shell extension wall, wherein the rear shell plate is positioned on one side, far away from the base plate, of the sound generating monomer and is spaced from the sound generating monomer, and the rear shell extension wall is bent and extended along the peripheral direction of the sound generating monomer close to the base direction from the periphery of the rear shell plate;

the shell further comprises a bearing arm which is bent and extended from one of the base extending wall and the rear shell extending wall to a position far away from the base extending wall and the rear shell extending wall, and a flange which is bent and extended from the bearing arm to a position close to the other one of the base extending wall and the rear shell extending wall; the flanging and the bearing arm together form a containing step, and the other one of the base extending wall and the rear shell extending wall is inserted into the containing step, abuts against the bearing arm and is attached to the flanging to form sealing;

the base is equipped with the phonation hole that runs through it, phonation hole with the vibrating diaphragm intercommunication, the backshell board the backshell extends the wall the base extends the wall and the back vocal chamber is enclosed into jointly to the vocal monomer, the vocal monomer be equipped with the portion of revealing of back vocal chamber intercommunication, be equipped with the hole of revealing on the backshell, the hole of revealing will back vocal chamber and external intercommunication.

Preferably, the ratio of the extension length of the flange to the extension length of the base extension wall or the extension length of the rear shell extension wall ranges from 0.1 to 0.2.

Preferably, the sounding unit comprises a basin frame, a vibration system and a magnetic circuit system, the vibration system is fixedly supported on the basin frame, the magnetic circuit system drives the vibration system to vibrate and sound, and the thickness of the shell is smaller than that of the basin frame.

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

Preferably, the base extension wall and/or the rear shell extension wall is attached to the basin stand, or a gap is formed between the base extension wall and/or the rear shell extension wall and at least one side of the basin stand, and the gap is smaller than 3 times of the thickness of the shell.

Preferably, the housing is made of a metal material.

Preferably, the housing is at least partially grounded.

Preferably, the sound production device further comprises a conductive member, one end of the conductive member is 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 production device further comprises a conductive piece, wherein the conductive piece comprises two electrical paths, one of the electrical paths is used for connecting the sound production unit with an external electrical signal, and the other electrical path is used for connecting the shell with the ground.

Preferably, the sound production device further comprises at least two positioning pieces, the two positioning pieces are connected to two opposite sides or two opposite corners of the shell, and one end, far away from the shell, of each positioning piece is provided with a positioning hole penetrating through the positioning piece.

Preferably, the locating piece is formed by extending the shell outwards.

Preferably, the housing is made of a steel sheet with a thickness of 0.15 mm.

Preferably, the sounding unit further comprises a front cover covering one side of the basin frame close to the vibrating diaphragm, the front cover, the base and the vibrating diaphragm together enclose a front sound cavity, the front cover is provided with a through hole penetrating through the front cover along the vibration direction, and the front sound cavity is connected with the outside through the through hole.

Preferably, the sound production device further comprises a front cover covering one side of the basin frame close to the vibrating diaphragm, the front cover, the base and the vibrating diaphragm together enclose a front sound cavity, the front cover is provided with a through hole penetrating through the front cover along the vibration direction, and the through hole connects the front sound cavity with the outside; the base is fixedly pressed on one side, far away from the vibrating diaphragm, of the periphery of the front cover, and the front cover penetrates through the sound-emitting hole and is exposed out of the base.

Preferably, the sound production device further comprises a ventilation damping member attached to the front cover, and the ventilation damping member completely covers the through hole.

Preferably, the sounding device comprises a sound guiding shell, the sound guiding shell is arranged on one side of the rear shell, the sound guiding shell is provided with a sound guiding cavity forming a side sounding structure, and the sound guiding cavity is communicated with the vibrating diaphragm.

Preferably, the shell and the sounding monomer further enclose a sound guide cavity forming a side sounding structure, and the sound guide cavity is communicated with the vibrating diaphragm.

Preferably, the sounding device further comprises a breathable isolating piece located in the rear sound cavity, and the breathable isolating piece is attached to the sounding single body and separates the sounding single body from the rear sound cavity.

Preferably, the sound production device further comprises a breathable partition located in the rear sound cavity, and the breathable partition comprises a partition body arranged opposite to the rear shell at a distance, a partition extending part bent and extending from the periphery of the partition body to the direction of the rear shell, and a partition fixing part bent and extending from one end of the partition extending part far away from the partition body; the isolating piece extending part and the rear shell extending wall are arranged at intervals, and the isolating piece fixing part is fixed on the rear shell; the breathable isolating piece and the rear shell jointly enclose a powder filling space.

Preferably, the isolating piece body is close to one side of the sounding monomer is far away from the sounding monomer is sunken in direction to form an avoiding step, and the avoiding step and the leakage part are arranged just opposite to each other.

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

Compared with the prior art, the utility model discloses an in the sounder, because receive the arm by the base extends the wall to keeping away from the base extend the wall with the backshell extends the wall and buckles to extend and form, the turn-ups by receive the arm to being close to the backshell extends the wall direction and buckles to extend and form, the turn-ups with it accepts the step to accept the common formation of arm. The rear shell extension wall is inserted into the accommodating step, abuts against the bearing arm and is attached to the flanging to form sealing. This accept arm and turn-ups's setting plays a location and strengthens sealed effect, the base with the backshell can pinpoint when the assembly, has effectually avoided assembly error to improve the base with the sealed effect of backshell, and then promote the acoustic performance of sound production device.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic perspective view of the sound device of the present invention;

FIG. 2 is an exploded view of the sound device according to the present invention;

FIG. 3 is a schematic view of a partial three-dimensional structure of the sound generating device of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 5 is a schematic perspective view of an embodiment of the sound production device of the present invention, in which a conductive member is added;

FIG. 6 is a schematic perspective view of another derivative embodiment of FIG. 5;

fig. 7 is a schematic perspective view of another embodiment of the sound production device of the present invention, which is added with a conductive member;

FIG. 8 is an exploded view of a portion of the perspective structure of FIG. 7;

FIG. 9 is a schematic structural view of an embodiment of the case forming side sounding structure of FIG. 4;

FIG. 10 is a schematic view of the sound device of FIG. 4 with an additional air permeable spacer;

FIG. 11 is a schematic view of another embodiment of the construction of the breathable barrier of the embodiment of FIG. 10;

FIG. 12 is a schematic structural view of a derivative embodiment of the embodiment of FIG. 11;

FIG. 13 is a schematic structural view of the sound device of FIG. 1 with an additional positioning plate;

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

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a sound generating device 100, which includes a housing 1 having an accommodating space and a sound generating unit 2 accommodated in the housing 1.

The sounding unit 2 includes a frame 21, a vibration system 22, a magnetic circuit system 23, and a leakage portion 24.

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

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

In this embodiment, the thickness of the shell 1 is smaller than that of the basin frame 21, and preferably, the shell 1 is made of a steel sheet with the thickness of 0.15mm, so that shell vibration is effectively reduced.

The casing 1 includes a base 11 and a rear case 12 respectively covering the two opposite sides of the sound generating unit 2 along the vibration direction of the diaphragm 221. In the 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 the size of the sounding device 100 along the direction perpendicular to the vibration direction is increased as small as possible while the structural strength of the shell 1 is satisfied; but also ensures the structural strength of the basin stand 21 and occupies as little space as possible.

The base 11 is fixed in including covering the sound production monomer 2 is close to the bed plate 111 of vibrating diaphragm 221 one side and by the outer peripheral edge of bed plate 111 is followed the week lateral direction of sound production monomer 2 keep away from the base that the vibrating diaphragm 221 direction was buckled and is extended extends wall 112.

The backshell 12 is including being located sound production monomer 2 keeps away from one side of bed plate 111 and with 2 spaced backshell boards 121 of sound production monomer and by backshell board 121's periphery is followed 2 week side directions of sound production monomer are close to the backshell extension wall 122 that base 11 direction was buckled and is extended.

The housing 1 further includes a receiving arm 13 extending from one of the base extension wall 112 and the rear shell extension wall 122 to be bent away from the base extension wall 112 and the rear shell extension wall 122, and a flange 14 extending from the receiving arm 13 to be bent toward the other of the base extension wall 112 and the rear shell extension wall 122; the flange 14 and the receiving arm 13 together form a receiving step 20, and the other one of the base extending wall 112 and the rear shell extending wall 122 is inserted into the receiving step 20, abuts against the receiving arm 13, and is attached to the flange 14 to form a seal.

Specifically, in this embodiment, the receiving arm 13 is formed by bending and extending the base extending wall 112 to a direction away from the base extending wall 112 and the rear shell extending wall 122, the flange 14 is formed by bending and extending the receiving arm 13 to a direction close to the rear shell extending wall 122, and the flange 14 and the receiving arm 13 together form the receiving step 20. The rear shell extension wall 122 is inserted into the receiving step 20, abuts against the receiving arm 13, and is attached to the flange 14 to form a seal. The arrangement of the bearing arm 13 and the flanging 14 plays a role in positioning and enhancing sealing, the base 11 and the rear shell 12 can be accurately positioned during assembly, assembly errors are effectively avoided, meanwhile, the sealing effect of the base 11 and the rear shell 12 is improved, and further the acoustic performance of the sound production device is improved.

Preferably, in this embodiment, the ratio of the extension length of the flange 14 to the extension length of the base extension wall 112 or the rear housing extension wall 122 is in a range of 0.1 to 0.2. The arrangement of the ratio range is convenient for welding or gluing the flanging 14 and the rear shell extension wall 122 to form sealing, and meanwhile, the materials of the base 11 and the rear shell 12 can be saved, so that the assembly efficiency of the base 11 and the rear shell 12 is improved, and the processing cost can be reduced.

The base 11 is provided with a sound hole 113 penetrating through the base, and the sound hole 113 is communicated with the diaphragm 221 for sound production. The rear shell plate 121, the rear shell extension wall 122, the base extension wall 112 and the sound generating unit 2 together enclose a rear sound cavity 102.

In this embodiment, the leakage portion 24 is communicated with the rear sound cavity 102, so that the sound-producing inner cavity 103 is communicated with the rear sound cavity 102 through the leakage portion 24 to improve the low-frequency acoustic performance.

Further, the rear shell plate 121, the rear shell extension wall 122, the base extension wall 112 and the sound generating unit 2 jointly enclose a closed rear sound cavity 102, and the rear shell 12 is provided with a leakage hole 123, where the leakage hole 123 communicates the rear sound cavity 102 with the outside for balancing sound pressure. Therefore, the utility model discloses an above-mentioned sound production device 100 has then formed confined back sound cavity structure, and its simple structure has improved sound production device 100's acoustic performance on the one hand, especially low frequency acoustic performance, and on the other hand because of the existence of back sound cavity 102 structure, base 11 and backshell 12 form and inhale the vibration effect, make sound production device 100 can not make electronic products such as mobile terminal after applying to electronic products such as mobile terminal produce the shell phenomenon of shaking, has effectively increased customer's user experience effect.

In this embodiment, the base extension wall 112 and/or the rear shell extension wall 122 are attached to the basin stand 21, or a gap is formed between the base extension wall 112 and/or the rear shell extension wall 122 and at least one side of the basin stand 21, and the gap is less than 3 times of the thickness of the housing 1. The space enables the sounding unit 2 to be assembled into the casing 1 more quickly, so that the assembly efficiency is improved, and the lateral space occupied by the sounding device 100 in the direction perpendicular to the vibration direction is not occupied more.

Preferably, the sounding unit 2 further includes a front cover 3 covering one side of the frame 21 close to the vibrating diaphragm 221, the front cover 3, the base 11 and the vibrating diaphragm 221 together define a front sound cavity 101, the front cover 3 is provided with a through hole 31 penetrating through the front sound cavity 101 along the vibration direction, and the through hole 31 connects the front sound cavity 101 with the outside. In the present embodiment, the front cover 3 is a part of the sound generating unit 2, that is, the sound generating unit 2 is provided with the front cover 3.

Alternatively, the front cover 3 may not be a part of the sounding unit 2, but is a part of the sounding device 100, for example, the sounding device 100 further includes the front cover 3 covering the side of the basin frame 21 close to the diaphragm 221, and the front cover 3, the base 11 and the diaphragm 221 together enclose the front sound cavity 101. The front cover 3 is provided with a through hole 31 penetrating through the front cover along the vibration direction, the front sound cavity 101 is connected with the outside through the through hole 31, and the structure arrangement improves the medium-frequency and high-frequency performance of the sound production device 100. In this embodiment, the base 11 is fixed to a side of the periphery of the front cover 3 away from the diaphragm 221 in a pressing manner, and the front cover 3 passes through the sound emitting hole 113 and is exposed out of the base 11.

In order to further improve the medium-frequency and high-frequency performance of the sound-generating device 100, the sound-generating device 100 further comprises a ventilation damping member 4 attached to the front cover 3, the ventilation damping member 4 completely covers the through hole 31, on one hand, the ventilation damping member is used for preventing foreign matters from entering the front sound cavity 101, and on the other hand, the medium-frequency and high-frequency performance of the sound-generating device can be adjusted by adjusting the damping of the ventilation damping member 4.

In this embodiment, the through holes 31 include a plurality of through holes and are arranged in an array, so as to improve the sound stability and balance.

In this embodiment, the housing 1 may be made of metal, glass, ceramic, or other materials. Preferably, the housing 1 is made of a metal material, such as steel, iron, copper, etc. It may be designed thinner while satisfying structural strength, thereby further reducing the lateral dimension of the sound device 100 in a direction perpendicular to the direction of vibration.

More preferably, the casing 1 is at least partially grounded, so that a shielding effect on the sounding single body 2 can be formed, interference influence of an external signal on the sounding single body 2 is reduced, and reliability is improved.

In this embodiment, the area ratio of the orthographic projection of the sound generating unit 2 to the rear shell 11 along the vibration direction of the diaphragm 221 to the rear shell 11 is at least 2/3. The structure can ensure that the size of the sounding device 100 perpendicular to the vibration direction is as small as possible, and the sounding device is more convenient to mount on a product with small transverse size in an assembly space while meeting the requirements of forming the rear sound cavity 102 to realize vibration absorption and improve low-frequency acoustic performance. Preferably, the sound production device 100 further comprises a ventilation spacer located in the rear sound cavity 102, and when sound absorption materials, such as sound absorption particles, are filled in the rear sound cavity 102, the ventilation spacer effectively prevents the sound absorption particles from entering a space between the magnetic circuit system 23 and the vibration system 22, thereby avoiding the risk of sound production failure and improving reliability.

Fig. 5 is a schematic view of a three-dimensional structure of an embodiment of the sound generating device of the present invention for adding a conductive member. In the sound generating device 300, the housing 301 is made of a metal material, such as steel, iron, copper, etc., and for example, the housing 301 is made of a steel sheet with a thickness of 0.15 mm.

The housing 301 can be made thinner with the same structural strength by using a metal material, thereby further reducing the horizontal dimension of the sound device 300 in the direction perpendicular to the vibration direction. The main differences from the embodiment shown in fig. 1 are: this embodiment also includes providing a conductive member 6.

Specifically, the sounding 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 grounded, so as to form a shielding effect, so that the sounding unit 300 is prevented from being interfered by external electromagnetic waves, and the working reliability is better.

Referring to fig. 6, a schematic perspective view of another derivative embodiment of fig. 5 is shown, that is, in the sound production device 400, the conductive member 406 is integrated with the housing 401, for example, the conductive member 406 is formed by extending the rear housing 4012 in a direction away from the basin stand and is located outside the housing 401.

Fig. 7 is a schematic perspective view of another embodiment of the sound generating device of the present invention, which is added with a conductive member. This embodiment differs from the embodiment shown in fig. 5 in that the structure and function of the conductive member are different.

Specifically, the sounding device 500 further includes a conductive component 506, the conductive component 506 includes two mutually insulated electrical pathways, one of the electrical pathways is used for connecting the sounding unit 502 and an external electrical signal and supplying power to the sounding unit 502, and the other electrical pathway is used for connecting the housing 501 and the ground to form a shield for the sounding unit 502. In this embodiment, the conductive member 506 is used to form a shielding function together with the housing 501, and is also used to supply power to the sound generating unit 502, so that the structure is simpler and dual functions can be realized.

For example, the conductive member 506 is an FPC structure. As shown in fig. 8, the conductive member 506 includes a first arm 5061 extending through the flange 5013 and/or the rear housing extension wall 50122, a second arm 5062 extending from opposite ends of the first arm 5061 in a direction towards the basin stand 5021, a third arm 5064 extending from the first arm 5061 in a direction away from the basin stand 5021, and a fourth arm 5064 extending from the first wall 5061 in a direction away from the basin stand 5021.

The first arm 5061 is electrically connected to the housing 501; the second arm 5062 is fixed to the basin stand 5021 and is electrically connected with the sounding unit 502 to supply power to the sounding unit 502; the third arm 5063 is used for connecting external electrical signals; the fourth arm 5064 is for grounding. That is, the first arm 5061 and the fourth arm 5064 jointly realize the connection between the housing 501 and the ground, so as to form an electrical path for shielding the sounding unit 502; the first arm 5061, the second arm 5062, and the third arm 5063 collectively realize electrical connection of the sounding unit 502 and an external electrical signal, and realize another electrical path through which the sounding unit 502 communicates with the external electrical signal.

As shown in fig. 9, a schematic structural diagram of an embodiment for forming a side sounding in addition to the embodiment shown in fig. 4 is shown. Namely, the sounding device generates sound from the front to form a side sounding structure.

Specifically, the sound production device 100 includes a cover disposed on the sound production unit 2, the sound guide casing 15 is disposed on one side of the rear casing 12, the sound guide casing 15 has a sound guide cavity 30 forming a side sound production structure, and the sound guide cavity 30 is communicated with the diaphragm 221. This side sound production structure can be better guide the sound production, is convenient for positive sound production and is used under the condition that keeps off, uses the flexibility higher.

For example, the sound guiding shell 15 and the diaphragm 221 together enclose a sound guiding cavity 30. Specifically, the sound guiding shell 15 includes a sound guiding shell plate 151 opposite to the vibrating diaphragm 221 at intervals and a sound guiding shell extension wall 152 fixed to the sound generating unit 2 at the periphery of the sound guiding shell plate 151 in a bending manner and supported by the sound generating unit 2, and the sound guiding shell extension wall 152 is provided with a sound guiding hole 153 penetrating through the sound guiding shell extension wall 152, so that a side sound generating structure is formed, and flexible application of different installation positions is facilitated.

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 sound cavity 101, which is easily understood by those skilled in the art. In this case, it is understood that the sound guiding shell 15 is a component of the sound generating device 100 and does not belong to the housing 1.

It is also possible to understand the sound guiding shell 15 as a part of the housing 1, i.e. the sound guiding shell 15 may be a part of the housing 1, in this case, the housing 1 and the sound generating unit 2 further enclose a sound guiding cavity 30 forming a side sound generating structure, and the sound guiding cavity 30 is communicated with the diaphragm 221

Fig. 10 is a schematic structural view of the sound production device shown in fig. 4 with an additional air-permeable partition. Specifically, sounding device 100 is still including being located ventilative separator 7 in back sound chamber 102, ventilative separator 7 pastes and locates sounding monomer 2 and will sounding monomer 2 is followed separation in the back sound chamber 102, when the sound granule was inhaled in the packing in the back sound chamber 102, ventilative separator has then prevented to inhale the sound granule and has got into 2 insides of sounding monomer and influence its acoustic performance, has improved the sound production reliability.

Please refer to fig. 11, which is a schematic view of a specific structure of the air-permeable partition in the embodiment shown in fig. 10. The sounding device 600 further includes a ventilation spacer 607 in the rear acoustic cavity 60102, the ventilation spacer 607 includes a spacer body 6071 opposite to the rear casing 6012 at an interval, a spacer extending portion 6072 extending along the direction of the rear casing 6012 in a bending manner along the periphery of the spacer body 6071, and a spacer fixing portion 6073 extending along the direction of the rear casing 6012 in a bending manner and away from the spacer extending portion 6072.

The spacer extension 6072 is spaced apart from the rear case extension wall 60122, and the spacer fixing part 6073 is fixed to the rear case 6012; the air-permeable isolating piece 607 and the rear shell 6012 together enclose a powder filling space 601. The structure that spacer extension 6072 and backshell extension 60122 interval set up can effectively increase the smooth and easy nature of ventilating of back acoustic cavity 60102, improves low frequency sound production performance's stability.

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, one side of the spacer body 7071, which is close to the sounding unit 702, is recessed in a direction away from the sounding unit 702 to form an avoidance step 7074, and the avoidance step 7074 is arranged opposite to the leakage portion 7024. This structural arrangement can make the leakage of the sounding inner cavity 7103 of the sounding unit 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 production device 800 further comprises at least two positioning pieces 8 and are respectively connected with the shell 801. One end of the positioning plate 8, which is far away from the shell 801, is provided with a positioning hole 81 penetrating through the positioning plate for fixing and positioning the sound generating device 800 and an application terminal whole machine, for example, a threaded hole, and a screw can be used to fix the sound generating device on the terminal whole machine through the positioning hole 81, so that the terminal whole machine is simple and convenient to use, and at least two positioning plates 8 can be arranged to more effectively form positioning and fixing. In order to further improve the fixing stability, the two positioning pieces 8 are connected to two opposite sides or two pairs of corners of the housing 801, and the sound generating device 800 and the terminal complete machine are positioned and fixed more effectively by the symmetrical arrangement. In the present 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 two-piece structure.

Please refer to fig. 14, which is a schematic structural diagram of a derivative embodiment of the embodiment shown in fig. 13. The difference between the sound device 900 of the present embodiment and the embodiment shown in fig. 13 is that in the sound device 900 of the present embodiment, the positioning plate 908 is formed by extending the housing 901 outward, i.e. the positioning plate 908 and the housing 901 are formed as an integral structure, so that the forming is simple, the number of devices is reduced, and the assembly efficiency is improved.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A sound production device comprises a shell with a containing space and a sound production unit contained in the shell, wherein the sound production unit comprises a vibrating diaphragm used for vibrating and producing sound,

the shell comprises a base and a rear shell which are respectively covered on two opposite sides of the sounding monomer along the vibration direction of the vibrating diaphragm;

2. The sounding device according to claim 1, wherein the ratio of the extension length of the flange to the extension length of the base extension wall or the rear housing extension wall is in the range of 0.1-0.2.

3. The sounding device according to claim 1, wherein the sounding unit comprises a basin frame, a vibration system respectively supported and fixed on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and sound, and the thickness of the shell is smaller than that of the basin frame.

4. The sounder device according to claim 3, wherein a ratio of a thickness of the housing to a thickness of the basket is less than 0.4.

5. The sounder device according to claim 3, wherein the base extension wall and/or the rear housing extension wall conforms to the basin frame, or the base extension wall and/or the rear housing extension wall and at least one side of the basin frame are provided with a spacing that is less than 3 times a thickness of the housing.

6. The sounder device according to claim 1, wherein the housing is made of a metallic material.

7. The sounder device according to claim 6, wherein the housing is at least partially grounded.

8. The sounder device according to claim 6, further comprising a conductive member having one end connected to the housing and another end for grounding.

9. The sounder device according to claim 8, wherein the conductive member is formed by extending from the housing.

10. The sounder device according to claim 6, further comprising a conductive member comprising two electrical paths, wherein one of the electrical paths is configured to connect the sounding body to an external electrical signal, and the other electrical path is configured to connect the housing to ground.

11. The sound production device of claim 6, further comprising at least two positioning pieces, wherein the two positioning pieces are connected to two opposite sides or two pairs of corners of the housing, and one end of each positioning piece, which is far away from the housing, is provided with a positioning hole penetrating through the positioning piece.

12. The sounder device according to claim 11, wherein the locating tab is formed by an outward extension of the housing.

13. The sounder device according to claim 1, wherein the housing is formed from 0.15mm thick sheet steel.

14. The sounding device according to claim 3, wherein the sounding unit further comprises a front cover covering one side of the frame close to the diaphragm, the front cover, the base and the diaphragm together enclose a front sound cavity, the front cover is provided with a through hole penetrating through the front sound cavity along the vibration direction, and the through hole connects the front sound cavity with the outside.

15. The sound production device according to claim 3, further comprising a front cover covering one side of the basin frame close to the diaphragm, wherein the front cover, the base and the diaphragm together enclose a front sound cavity, the front cover is provided with a through hole penetrating through the front cover along the vibration direction, and the through hole connects the front sound cavity with the outside; the base is fixedly pressed on one side, far away from the vibrating diaphragm, of the periphery of the front cover, and the front cover penetrates through the sound-emitting hole and is exposed out of the base.

16. The sounder device according to claim 14 or 15, further comprising a gas permeable damper affixed to the front cover, the gas permeable damper completely covering the through hole.

17. The sound-producing device of claim 1, wherein the sound-producing device includes a sound-guiding housing covering a side of the sound-producing unit away from the back housing, the sound-guiding housing having a sound-guiding cavity forming a side sound-producing structure, the sound-guiding cavity communicating with the diaphragm.

18. The sound production device of claim 1, wherein the housing and the sound production unit further enclose a sound guide cavity forming a side sound production structure, and the sound guide cavity is communicated with the diaphragm.

19. The sound-producing device of claim 1 further comprising a gas-permeable spacer positioned within the rear acoustic cavity, the gas-permeable spacer being attached to the sound-producing unitary body and separating the sound-producing unitary body from the rear acoustic cavity.

20. The sound device as claimed in claim 1, further comprising a gas permeable spacer located in the rear sound cavity, wherein the gas permeable spacer comprises a spacer body disposed opposite to the rear housing at a distance, a spacer extension portion extending from the periphery of the spacer body in a bending manner toward the rear housing, and a spacer fixing portion extending from an end of the spacer extension portion away from the spacer body in a bending manner; the isolating piece extending part and the rear shell extending wall are arranged at intervals, and the isolating piece fixing part is fixed on the rear shell; the breathable isolating piece and the rear shell jointly enclose a powder filling space.

21. The sound production device according to claim 20, wherein a side of the spacer body close to the sounding unit is recessed away from the sounding unit to form an avoiding step, and the avoiding step is opposite to the leakage portion.

22. The sound production device of claim 1, wherein the ratio of the area of the orthographic projection of the sound production unit to the back shell along the vibration direction of the diaphragm is at least 2/3.