CN212628369U

CN212628369U - Sound production device

Info

Publication number: CN212628369U
Application number: CN202020964283.2U
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: WO2021237791A1

Abstract

The utility model provides a sounding device, which comprises a sounding monomer with a vibrating diaphragm, a front cover and a rear shell; the base comprises a base body and an annular base supporting wall, the base body and the vibrating diaphragm are arranged at intervals, the sounding monomer is supported on the base supporting wall, the sounding monomer and the base form a front sound cavity together in an enclosing mode, and the base supporting wall is provided with a sound guide channel which communicates the front sound cavity with the outside; the backshell includes the backshell board, by the backshell extension wall that the periphery of backshell board was buckled along basin frame week and is extended, and the backshell extends the wall butt and forms sealed fixed in base supporting wall and at least part embedding base supporting wall, and the backshell encloses into the back sound chamber with the sound production monomer jointly, and the backshell board is equipped with the hole of leaking, leaks the hole with back sound chamber and external intercommunication. Compared with the prior art, the utility model discloses a sounding device simple structure, acoustic performance are excellent, user experience is effectual.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion field especially relates to an apply to vocal device of portable mobile electronic product.

[ 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.

Therefore, there is a need 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 sound production device that simple structure, acoustic performance are good, user experience is effectual.

In order to achieve the above object, the present invention provides a sound generating device, which comprises a sound generating unit with a vibrating diaphragm, and a base and a back shell respectively covering two opposite sides of the sound generating unit along the vibration direction of the vibrating diaphragm; the base comprises a base body and an annular base supporting wall, the base body is fixedly covered on one side, close to the vibrating diaphragm, of the sound generating unit, the annular base supporting wall extends from the base body to the direction of the rear shell, the base body and the vibrating diaphragm are arranged at intervals, the sound generating unit is supported on the base supporting wall, the sound generating unit and the base jointly form a front sound cavity, the base supporting wall is provided with a sound guide channel penetrating through the base supporting wall, and the front sound cavity is communicated with the outside through the sound guide channel; the backshell is including being located sound production monomer keeps away from vibrating diaphragm one side and with sound production monomer spaced backshell board with by the periphery of backshell board is followed sound production monomer week incline to the backshell extension wall that the direction of base support wall was buckled and is extended, the backshell extend wall butt in base support wall and at least partial embedding form sealed fixed in the base support wall, the backshell with sound production monomer encloses into the back vocal cavity jointly, sound production monomer be equipped with the portion of revealing of back vocal cavity intercommunication, the backshell board is equipped with the hole of revealing that runs through it, the hole of revealing will back vocal cavity and external intercommunication.

Preferably, the rear housing extension wall is rectangular and includes a first wall, a second wall disposed opposite to the first wall, and a third wall and a fourth wall respectively connected to the first wall and the second wall and disposed opposite to each other, and the first wall is provided with a notch penetrating through the first wall; the base supporting wall comprises a supporting wall body and a supporting step extending from one end, close to the vibrating diaphragm, of the supporting wall body to the sounding monomer; the first wall is at least partially embedded in the support wall body, and the sound guide channel penetrates through the support wall body and passes through the notch; the second wall, the third wall and the fourth wall are respectively abutted against the support wall body and the support step and embedded into the base support wall from the support step to the direction of the base body.

Preferably, the rear shell extension wall is cylindrical and is provided with a notch penetrating through the rear shell extension wall, and the base support wall comprises a support wall body and a support step extending from one end, close to the vibrating diaphragm, of the support wall body to the sound generating unit; one part of the rear shell extension wall is abutted against the support wall body and the support step and is embedded into the base support wall from the support step to the direction of the base body, the other part of the rear shell extension wall is embedded into the support wall body, and meanwhile, the sound guide channel penetrates through the support wall body embedded with the rear shell extension wall and penetrates through the notch.

Preferably, the rear shell is made of a metal material, the base is made of a plastic material, and one end, close to the base supporting wall, of the rear shell extending wall is embedded into the base and forms sealing fixation.

Preferably, the rear 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 rear shell, and the other end of the conductive member is used for grounding.

Preferably, the conductive member is formed by extending the rear case.

Preferably, the sound production device further comprises a conductive member, the conductive member 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 rear shell with the ground.

Preferably, the sound production device further comprises a conductive terminal, the rear housing is further provided with an electrical connection hole penetrating through the rear housing, and at least part of the conductive terminal is located in the electrical connection hole, exposed out of the rear housing, and used for being electrically connected with an external circuit.

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 sounding monomer further comprises a magnetic yoke arranged on one side opposite to the vibrating diaphragm and a breathable isolating piece fixed on the magnetic yoke, the magnetic yoke is provided with a through hole penetrating through the magnetic yoke, the breathable isolating piece completely covers the through hole, and the through hole is communicated with the rear sound cavity through the breathable isolating piece.

Preferably, the magnetic yoke comprises a magnetic yoke body arranged opposite to the vibrating diaphragm and a groove formed by the magnetic yoke body in a manner that the magnetic yoke body is sunken towards the vibrating diaphragm along the vibration direction of the vibrating diaphragm, the through hole penetrates through the groove, the breathable isolating piece is fixed to the groove, and the area of the breathable isolating piece in the orthographic projection of the vibrating diaphragm towards the groove along the vibration direction of the vibrating diaphragm is smaller than the area of the groove.

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 isolation piece extending part and the side wall are arranged at intervals, and the isolation 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 rear shell is made by drawing a sheet of steel having a thickness of 0.15 mm.

Preferably, the rear casing extension wall is spaced apart from the sound generating unit.

Preferably, the distance between the rear shell extension wall and the sounding monomer is less than or equal to 0.05 mm.

Preferably, the sound production monomer includes the basin frame, supports respectively and is fixed in the vibration system and the drive of basin frame the magnetic circuit of vibration system vibration sound production, the vibrating diaphragm is fixed in the basin frame, the backshell extend the wall laminate in the basin frame, or the backshell extend the wall with at least one side of basin frame is equipped with the interval, and this interval is less than 3 times the thickness of backshell.

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

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

Preferably, the area ratio of the orthographic projection of the sounding monomer to the rear shell plate along the vibration direction of the diaphragm to the projection plane of the rear shell plate is at least 4/5.

Preferably, the sound production device further comprises at least two positioning pieces, the base cover is arranged on the rear shell and forms a shell together with the rear shell, the at least 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.

Compared with the prior art, in the sounding device of the utility model, the base and the rear shell are designed to cover the opposite sides of the sounding monomer respectively, the base is provided with the base supporting wall for supporting the sounding monomer, and the rear shell is provided with the rear shell extending wall which is abutted against the base supporting wall and at least partially embedded into the base supporting wall to form sealing fixation, the structure ensures that the rear shell and the sounding monomer form a rear sound cavity together, the rear shell is provided with the leakage hole for communicating the rear sound cavity with the outside, the structure forms a closed rear sound cavity structure, not only has simple structure, but also has small increase of the whole horizontal size perpendicular to the vibration direction, ensures that the acoustic effect of the sounding device is better, and the closed rear sound cavity structure ensures that the base and the rear shell can be used for vibration absorption, thereby the sounding device avoids the generation of shell vibration phenomenon after being applied to a mobile terminal, the user experience effect is better.

[ 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 a part of the three-dimensional structure of the sound device of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

fig. 4 is a schematic three-dimensional structure view of the sound-generating unit of the sound-generating device of the present invention;

fig. 5 is an exploded view of a part of the three-dimensional structure of the sound-generating unit of the sound-generating device of the present invention;

fig. 6 is a schematic perspective view of the base of the sound device of the present invention;

fig. 7 is a schematic perspective view of the rear housing of the sound device of the present invention;

fig. 8 is a schematic perspective view of another embodiment of the sound production device of the present invention;

fig. 9 is an exploded view of a part of a three-dimensional structure of another embodiment of the sound device of the present invention;

fig. 10 is a schematic perspective view of an embodiment of the sound generating device of the present invention, which is added with a conductive member;

fig. 11 is a schematic perspective view of another embodiment of the sound generating device of the present invention;

FIG. 12 is a schematic perspective view of another derivative embodiment of FIG. 11;

fig. 13 is an exploded perspective view of another embodiment of the conductive member added to the sound device according to the present invention;

FIG. 14 is a schematic structural view of another embodiment of the acoustic device of FIG. 3 with an additional air permeable barrier;

FIG. 15 is a schematic view showing a detailed structure of the air-permeable barrier in the embodiment shown in FIG. 14;

FIG. 16 is a schematic diagram of a derivative embodiment of the embodiment of FIG. 15;

FIG. 17 is a schematic structural view of an embodiment of an additional spacer for the sound device shown in FIG. 1;

FIG. 18 is a schematic diagram of a derivative embodiment of the embodiment shown in FIG. 17.

[ 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. 1-7, the present invention provides a sound generating device 100, which includes a sound generating unit 1 having a diaphragm 121, a base 2 and a rear housing 3.

In the present embodiment, the sound generating unit 1 includes a frame 11, a vibration system 12, a magnetic circuit system 13, and a leakage portion 130.

The vibration system 12 and the magnetic circuit system 13 are respectively supported and fixed on the basin frame 11 and jointly enclose a sounding inner cavity 104, and the magnetic circuit system 13 drives the vibration system 12 to vibrate and sound.

The vibration system 12 includes the diaphragm 121 fixed to the frame 11. The diaphragm 121 is used for vibrating and sounding.

The magnetic circuit system 13 includes a yoke 131 disposed on the opposite side of the diaphragm 121.

The base 2 and the rear shell 3 are respectively covered on two opposite sides of the sounding monomer 1 along the vibration direction of the vibrating diaphragm 121. In this embodiment, the base 2 and the rear shell 3 are respectively covered on two opposite sides of the basin stand 11 along the vibration direction of the vibrating diaphragm 121.

In the present embodiment, the ratio of the thickness of the rear housing 3 to the thickness of the tub 11 is less than 0.4, so that the size of the sound generating device 100 in the direction perpendicular to the vibration direction is increased as small as possible while the structural strength of the housing 1 is satisfied; but also ensures the structural strength of the basin stand 11 and occupies as little space as possible.

The base 2 comprises a base body 21 and a base support wall 22.

The base body 21 is covered and fixed on one side of the sound generating unit 1 close to the vibrating diaphragm 121. In this embodiment, the base body 21 is covered and fixed on one side of the basin stand 11 close to the vibrating diaphragm 121. The base body 21 and the diaphragm 121 are disposed at an interval.

The base support wall 22 extends from the base body 21 in the direction of the rear housing 3. The base support wall 22 is annular. The sounding unit 1 is supported by the base supporting wall 22, that is, the basin stand 11 is supported by the base supporting wall 22. In particular, the base support wall 22 is provided with a sound conduction channel 220 extending therethrough. The sounding monomer 1 and the base 2 jointly form a front sound cavity 5. Specifically, the diaphragm 121, the frame 11 and the base 2 together enclose the front acoustic cavity 5. The sound guide channel 220 connects the front sound cavity 5 with the outside to form a side sound production structure. The sound guiding channel 220 and the front sound cavity 5 together form a front cavity 6. The front cavity 6 improves the acoustic performance, particularly the high frequency acoustic performance, of the sound generating device 100.

The rear case 3 includes a rear case plate 31 and a rear case extension wall 32.

The back shell plate 31 is located on one side, away from the vibrating diaphragm 121, of the sound generating unit 1, and the back shell plate 31 and the sound generating unit 1 are arranged at intervals. In this embodiment, the back shell plate 31 is located on a side of the basin stand 11 away from the diaphragm 121. The rear shell plate 31 and the basin stand 11 are arranged at intervals. Specifically, the rear shell plate 31 is provided with a leakage hole 310 therethrough.

The rear-housing extension wall 32 is bent and extended from the periphery of the rear-housing plate 31 in the direction from the peripheral side of the sound-emitting unit 1 to the base support wall 22. In this embodiment, the rear-case extension wall 32 is bent and extended from the periphery of the rear-case plate 31 in the direction from the peripheral side of the tub 11 toward the base support wall 22. The rear housing extension wall 32 abuts the base support wall 22 and is at least partially embedded in the base support wall 22 to form a sealed fixation.

In this embodiment, the rear housing extension wall 32 is attached to the frame 11, thereby sealing the rear acoustic chamber 10.

Or, a space 105 is arranged between the rear shell extension wall 32 and at least one side of the basin frame 11, and the space 105 is less than 3 times the thickness of the rear shell 3. The space 105 enables the sound generating unit 1 to be assembled into the rear housing 3 more quickly, thereby improving the assembly efficiency without occupying more of the lateral space occupied by the sound generating device 100 in the direction perpendicular to the vibration direction.

In this embodiment, the base support wall 22 includes a support wall body 221 and a support step 222 extending from one end of the support wall body 221 close to the diaphragm 121 to the sound generating unit 1.

In this embodiment, the rear-housing extension wall 32 is rectangular and includes a first wall 321, a second wall 322 opposite to the first wall 321, and a third wall 323 and a fourth wall 324 respectively connected to the first wall 321 and the second wall 322 and opposite to each other, wherein the first wall 321 has a notch 320 penetrating therethrough. The first wall 321 is at least partially embedded in the supporting wall body 221, and the sound guiding channel 220 penetrates through the supporting wall body 221 and passes through the gap 320. The second wall 322, the third wall 323, and the fourth wall 324 respectively abut against the support wall body 221 and the support step 222, and are embedded in the base support wall 22 from the support step 222 toward the base body 21. This configuration allows the rear housing extension wall 32 to fit into the base support wall 22 and to escape the sound guide channel 220 through the gap 320, thereby sealing the rear housing extension wall 32 from the base support wall 22.

Of course, without limitation, the rear housing extension wall 32 may have other shapes than just a rectangular shape. For example, referring to fig. 8-9, fig. 8 is a sound-producing device 500 according to another embodiment of the present invention. The rear housing extension wall 532 is cylindrical and has a gap 5320 penetrating therethrough, and the base support wall 522 includes a support wall body 5221 and a support step 5222 extending from one end of the support wall body 5221 close to the diaphragm 5121 to the sound unit 51; one part of the rear housing extension wall 532 abuts against the support wall body 5221 and the support step 5222 respectively, and is embedded into the base support wall 522 from the support step 5222 toward the base body 521, and the other part thereof is embedded into the support wall body 5221, and meanwhile, the sound guide channel 5220 penetrates through the support wall body 5221 embedded with the rear housing extension wall 532 and the gap 5320.

The rear shell 3 and the sounding monomer 1 jointly form a rear sound cavity 7. Specifically, the rear shell 3, the frame 11 and the magnetic circuit system 13 together enclose the rear acoustic cavity 7, and the leakage portion 130 is communicated with the rear acoustic cavity 10, so that the sound-producing inner cavity 104 is communicated with the rear acoustic cavity 7 through the leakage portion 130, and low-frequency acoustic performance is improved. The leakage hole 310 communicates the rear sound chamber 7 with the outside. 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 on the one hand sound production device 100's acoustic performance, especially low frequency acoustic performance, on the other hand because of the existence of back sound cavity 7 structure, base 2 and backshell 3 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 addition, the space 105 can also be used to increase the volume of the rear sound cavity 7, so as to further improve the acoustic performance, and in this embodiment, the space 105 is less than or equal to 1/3 of the width of the fixing surface of the frame 11 to which the diaphragm 121 is fixed.

In the present embodiment, the area ratio of the orthogonal projection of the sound generating unit 1 to the back shell plate 31 in the vibration direction of the diaphragm 121 to the projection plane of the back shell plate 31 is at least 4/5. 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 7 to realize vibration absorption and improve low-frequency acoustic performance.

In the present embodiment, the leakage hole 310 includes a first leakage hole 3101 provided at a central position of the rear shell plate 31 and a second leakage hole 3102 provided at a distance from the first leakage hole 310. Specifically, the aperture of the second leakage hole 3102 is smaller than that of the first leakage hole 310, which is beneficial to improve the balance between the rear sound cavity 7 and the outside, thereby improving the low-frequency acoustic performance of the sound generating device 100.

Preferably, the sound production device 100 further comprises a breathable partition 14 located in the rear sound cavity 7, and when sound absorption materials are filled in the rear sound cavity 7, for example, when sound absorption particles are absorbed, the breathable partition 14 effectively prevents the sound absorption particles from entering a space between the magnetic circuit system 13 and the vibration system 12, thereby avoiding the risk of sound production failure and improving reliability.

In the present embodiment, the leakage portion 130 penetrates the yoke 131. The breathable barrier 14 completely covers the leakage portion 130. The sound generating unit 1 further includes a ventilation spacer 14, and the ventilation spacer 14 is fixed to the yoke 131. The leakage part 130 communicates with the rear acoustic chamber 7 through the air-permeable partition 14. This construction allows the breathable spacer 14 to ensure, on the one hand, a balance between the leak 130 and the rear acoustic cavity 7, thus adjusting the low frequency performance of the sound-generating device 100; on the other hand, foreign matters such as external dust and moisture can be prevented from directly entering the sounding unit 1 through the rear sound cavity 7 through the leakage part 130, so that the reliability of the sounding device 100 is improved.

Preferably, the yoke 131 includes a yoke body 1311 disposed opposite to the diaphragm 121, and a groove 1312 formed by recessing the yoke body 1311 in the vibration direction of the diaphragm 121 toward the diaphragm 121, and the leakage portion 130 penetrates the groove 1312. The breathable isolation piece 14 is fixed to the groove 1312, an area of an orthographic projection of the breathable isolation piece 14 to the groove 1312 along the vibration direction of the diaphragm 121 is smaller than an area of the groove 1312, that is, the breathable isolation piece 14 is fixed to the groove 1312 in a covering manner and covers the leakage portion 130, and the breathable isolation piece 14 is accommodated in the groove 1312 and is not filled. In the present embodiment, the rear case 3 is made of a metal material. Of course, the material of the rear case 3 is not limited thereto, and may be other materials such as plastic, glass, ceramic, and the like. Specifically, the rear shell 3 is made by drawing a steel sheet with the thickness of 0.15 mm.

In this embodiment, the base 2 is made of a plastic material, and one end of the rear casing extension wall 32 close to the base support wall 22 is embedded into the base 2 and forms a sealing fixation. The rear housing extension wall 32 is integrally injection molded with the base support wall 22. The rear housing extension wall 32 is a steel sheet to facilitate integral injection molding. Of course, the material of the base 2 is not limited thereto, and may be other materials such as glass, ceramic, and the like.

The rear housing extension wall 32 is spaced from the tub 11. This structure serves to increase the volume of the rear acoustic chamber 7, further improving acoustic performance.

The distance between the rear shell extension wall 32 and the basin frame 11 is less than or equal to 0.05 mm. In the present embodiment, the distance between the rear case extension wall 32 and the tub 11 is set to 0.05 mm. After the structure is arranged, under the condition that the structural strength stability of the rear shell 3 is ensured, the size of the sounding device 100 is relatively minimum along the single side perpendicular to the vibration direction of the vibrating diaphragm 121, the size of the single side is only increased by 0.2mm, and the sounding device is not applied to the portable mobile terminal electronic product in an influence period.

Fig. 10 is a schematic perspective view of an embodiment of a sound generating device according to the present invention, which is added with a conductive member. In the sound generating device 600, the rear housing 603 is made of a metal material, such as steel, iron, copper, etc., for example, the rear housing 603 is made of a steel sheet with a thickness of 0.15 mm.

The back case 603 can be made thinner with the same structural strength by using a metal material, thereby further reducing the horizontal dimension of the sound device 600 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 4.

Specifically, the sounding device 300 further includes a conductive component 4, one end of the conductive component 4 is connected to the rear case 603, and the other end of the conductive component 4 is grounded, so as to form a screen effect, that is, the rear case 603 is at least partially grounded, so that the sounding unit 600 is prevented from being interfered by external electromagnetic waves, and the working reliability is better.

Referring to fig. 11, fig. 11 is a schematic perspective view of another derivative embodiment of fig. 10, that is, in the sound-producing device 700, the conductive member 704 is integrated with the rear housing 703, for example, the conductive member 704 is formed by extending the rear housing 703 away from the basin stand and is located outside the rear housing 703.

Fig. 12 is a schematic perspective view of another embodiment of a sound generating device according to the present invention, which is added with a conductive member. This embodiment is different from the embodiment shown in fig. 10 in that the conductive member is different in structure and function.

Specifically, the sounding device 800 further includes a conductive component 804, where the conductive component 804 includes two mutually insulated electrical paths, one of the electrical paths is used to connect the sounding unit 801 with an external electrical signal and to supply power to the sounding unit 801, and the other electrical path is used to connect the rear shell 803 with the ground, so as to form a shield for the sounding unit 801. In this embodiment, the conductive member 804 is used to form a shielding function together with the rear housing 803, and is also used to supply power to the sound generating unit 801, so that the structure is simpler and dual functions can be realized.

For example, the conductive member 804 is an FPC structure. As shown in fig. 8 to 9, the conductive element 804 includes a first arm 8041 penetrating through the side wall 5012, a second arm 8042 extending from two opposite ends of the first arm 8041 to the direction of the basin frame 3b, a third arm 8044 extending from the first arm 8041 to the direction away from the basin frame 3b, and a fourth arm 8044 extending from the first arm 8041 to the direction away from the basin frame 3 b.

The first arm 8041 is electrically connected to the rear housing 803; the second arm 8042 is fixed on the basin frame 3b, is electrically connected with the sounding unit 801, and supplies power to the sounding unit 801; the third arm 8043 is used for connecting external electrical signals; the fourth arm 8044 is used for grounding. That is, the first arm 8041 and the fourth arm 8044 jointly realize the connection between the rear shell 803 and the ground, so as to form an electrical path for shielding the sounding unit 801; the first arm 8041, the second arm 8042 and the third arm 8043 together realize that the sounding unit 801 is electrically connected with an external electric signal, and realize that the sounding unit 801 is communicated with the external electric signal through another electric path.

Fig. 13 is an exploded view of another embodiment of the sound device of the present invention, which is provided with a conductive member. It differs from the embodiment shown in fig. 1 in that: the sounding device 900 further includes a conductive terminal 904 fixed to the frame 9011 of the sounding unit 901, the rear casing 903 further has a power connection hole 908 penetrating through the rear casing 903, and at least a portion of the conductive terminal 904 is located in the power connection hole 908 and exposed out of the rear casing 903 for electrically connecting to an external circuit. Therefore, the sounding device 900 is connected with electricity along the vibration direction, the occupation of the transverse space of the sounding device 900, which is perpendicular to the vibration direction, is avoided, and the terminal with small assembly space is more favorably applied.

Fig. 14 is a schematic structural view of another embodiment of the sound production device shown in fig. 3, wherein a gas-permeable partition is added. Specifically, sound production device 100a is still including being located ventilative separator 14a in back sound chamber 7a, ventilative separator 14a pastes and locates sound production monomer 1a will sound production monomer 1a is followed partition in the back sound chamber 7a, when the sound granule is inhaled in the filling in back sound chamber 7a, ventilative separator has then prevented to inhale sound granule and has got into inside and influence its acoustic performance of sound production monomer 1a, has improved the reliability of making a sound.

Referring to fig. 15, a schematic view of a specific structure of the air-permeable partition in the embodiment shown in fig. 14 is shown. The sound-producing device 100b further includes a breathable spacer 14b located in the rear sound cavity 7b, and the breathable spacer 14b includes a spacer body 14b1 disposed opposite to the rear housing 3b at a distance, a spacer extension portion 14b2 extending from the periphery of the spacer body 14b1 to the rear housing 3b in a bending manner, and a spacer fixing portion 14b3 extending from one end of the spacer extension portion 14b2 away from the spacer body 14b1 in a bending manner.

The spacer extension part 14b2 is provided spaced apart from the rear case extension wall 32b, and the spacer fixing part 14b3 is fixed to the rear case 3 b; the air-permeable partition 14b and the rear shell 3b together enclose a powder filling space 7 c. The structure that the spacer extension part 14b2 and the rear shell extension wall 32b are arranged at intervals can effectively increase the ventilation smoothness of the rear sound cavity 7b and improve the stability of low-frequency sound production performance.

Please refer to fig. 16, which is a schematic structural diagram of a derivative embodiment of the embodiment shown in fig. 15. In the sound-generating device 100c, one side of the spacer body 14c1 close to the sound-generating single body 1c is recessed towards the direction far away from the sound-generating single body 1c to form an avoiding step 1310, and the avoiding step 1310 is arranged opposite to the leakage portion 130 c. This structural arrangement can make the leakage of the sounding inner cavity 104c of the sounding unit 1c smoother, thereby improving the sounding performance.

Please refer to fig. 17, which is a schematic structural diagram of a derivative embodiment of the embodiment shown in fig. 1. The base 1002 covers the rear housing 1003 and forms a housing 8 together with the rear housing 1003, and the sound generating device 1000 further includes at least two positioning pieces 9 respectively connected to the housing 8. One end of the positioning plate 9, which is far away from the housing 8, is provided with a positioning hole 91 penetrating through the positioning plate for fixing and positioning the sound generating device 1000 with an application terminal complete machine, for example, a threaded hole, and a screw can be used to fix the sound generating device to the terminal complete machine through the positioning hole 91, which is simple and convenient, and the positioning plate 9 is provided with at least two positioning holes for more effective positioning and fixing. In order to further improve the fixing stability, the two at least positioning pieces 9 are connected to two opposite sides or two pairs of corners of the housing 8, and the sound generating device 1000 and the terminal complete machine are positioned and fixed more effectively by the symmetrical arrangement. In the present embodiment, the positioning piece 9 is fixed to the housing 8 by welding, that is, the positioning piece 9 and the housing 8 are a two-piece structure.

Please refer to fig. 18, which is a schematic structural diagram of a derivative embodiment of the embodiment shown in fig. 17. The difference between the sound device 1100 in the present embodiment and the embodiment shown in fig. 18 is that in the positioning piece 1109, the housing 1108 extends outward, that is, the positioning piece 1109 and the housing 1108 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 embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A sound production device comprises a sound production single body with a vibrating diaphragm, and is characterized by further comprising a base and a rear shell, wherein the base and the rear shell are respectively arranged on two opposite sides of the sound production single body in a covering mode along the vibration direction of the vibrating diaphragm; the base comprises a base body and an annular base supporting wall, the base body is fixedly covered on one side, close to the vibrating diaphragm, of the sound generating unit, the annular base supporting wall extends from the base body to the direction of the rear shell, the base body and the vibrating diaphragm are arranged at intervals, the sound generating unit is supported on the base supporting wall, the sound generating unit and the base jointly form a front sound cavity, the base supporting wall is provided with a sound guide channel penetrating through the base supporting wall, and the front sound cavity is communicated with the outside through the sound guide channel; the backshell is including being located sound production monomer keeps away from vibrating diaphragm one side and with sound production monomer spaced backshell board with by the periphery of backshell board is followed sound production monomer week incline to the backshell extension wall that the direction of base support wall was buckled and is extended, the backshell extend wall butt in base support wall and at least partial embedding form sealed fixed in the base support wall, the backshell with sound production monomer encloses into the back vocal cavity jointly, sound production monomer be equipped with the portion of revealing of back vocal cavity intercommunication, the backshell board is equipped with the hole of revealing that runs through it, the hole of revealing will back vocal cavity and external intercommunication.

2. The sounder device according to claim 1, wherein the rear housing extension wall is rectangular and comprises a first wall, a second wall disposed opposite the first wall, and third and fourth walls connected to the first and second walls, respectively, and disposed opposite each other, the first wall having a gap therethrough; the base supporting wall comprises a supporting wall body and a supporting step extending from one end, close to the vibrating diaphragm, of the supporting wall body to the sounding monomer; the first wall is at least partially embedded in the support wall body, and the sound guide channel penetrates through the support wall body and passes through the notch; the second wall, the third wall and the fourth wall are respectively abutted against the supporting wall body and the supporting step and embedded into the base supporting wall from the supporting step to the direction of the base body.

3. The sounding device according to claim 1, wherein the extension wall of the back shell is cylindrical and has a gap extending therethrough, and the supporting wall of the base comprises a supporting wall body and a supporting step extending from an end of the supporting wall body near the diaphragm to the sounding unit; one part of the rear shell extension wall is respectively abutted against the support wall body and the support step and is embedded into the base support wall from the support step to the direction of the base body, the other part of the rear shell extension wall is embedded into the support wall body, and meanwhile, the sound guide channel penetrates through the support wall body embedded with the rear shell extension wall and penetrates through the notch.

4. The sounder device according to claim 1, wherein the rear housing is formed from a metal material and the base is formed from a plastic material, and wherein an end of the rear housing extension wall adjacent the base support wall is embedded in the base and sealingly secured thereto.

5. The sounder device according to claim 1, wherein the rear housing is at least partially grounded.

6. The sounder device according to claim 1, further comprising a conductive member, one end of the conductive member being connected to the rear housing, the other end of the conductive member being adapted to be grounded.

7. The sounder device according to claim 6, wherein the conductive member is formed by an extension of the rear housing.

8. The sounder device according to claim 1, 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 rear housing to ground.

9. The sound device as claimed in claim 1, wherein the sound device further comprises a conductive terminal, the rear housing further has an electrical connection hole extending therethrough, and the conductive terminal is at least partially located in the electrical connection hole and exposed to the rear housing for electrical connection with an external circuit.

10. 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.

11. The sounding device according to claim 1, wherein the sounding unit further comprises a yoke disposed on an opposite side of the diaphragm and a ventilation spacer fixed to the yoke, the yoke has a through hole extending therethrough, the ventilation spacer completely covers the through hole, and the through hole communicates with the rear acoustic cavity through the ventilation spacer.

12. The sounding device according to claim 11, wherein the yoke comprises a yoke body disposed opposite to the diaphragm, and a groove formed by recessing the yoke body in a direction of the diaphragm along a vibration direction of the diaphragm, the through hole penetrates through the groove, the air-permeable spacer is fixed to the groove, and an area of an orthographic projection of the air-permeable spacer on the groove along the vibration direction of the diaphragm is smaller than an area of the groove.

13. 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.

14. The sound production device according to claim 13, 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.

15. A sounder device according to claim 1, wherein the rear housing is drawn from 0.15mm thick sheet steel.

16. The sounding device according to claim 1, wherein the sounding unit comprises a frame, a vibration system fixed to the frame and a magnetic circuit system for driving the vibration system to vibrate and sound, the diaphragm is fixed to the frame, the extension wall of the back case is attached to the frame, or a gap is formed between the extension wall of the back case and at least one side of the frame, and the gap is smaller than 3 times the thickness of the back case.

17. The sounder device according to claim 16, wherein a ratio of a thickness of the rear housing to a thickness of the frame is less than 0.4.

18. The sounder device according to claim 16, wherein the spacing is less than or equal to 1/3 of the width of the fixing surface of the diaphragm to the frame.

19. The sound production device of claim 1, wherein the ratio of the area of the orthographic projection of the sound production unit to the rear shell plate in the vibration direction of the diaphragm to the area of the projection plane of the rear shell plate is at least 4/5.

20. The sound production device of claim 1, further comprising at least two positioning pieces, wherein the base cover is disposed on the rear housing and forms a housing together with the rear housing, the at least two positioning pieces are connected to two opposite sides or two pairs of corners of the housing, and one end of the positioning piece away from the housing is provided with a positioning hole penetrating through the positioning piece.

21. The sounder device according to claim 20, wherein the splines are formed by extending outwardly from the housing.