CN212628373U

CN212628373U - Sound production device

Info

Publication number: CN212628373U
Application number: CN202020964699.4U
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: WO2021237788A1

Abstract

The utility model provides a sounding device, which comprises a shell with an accommodating space and a sounding monomer accommodated in the accommodating space, wherein the sounding monomer comprises a vibrating diaphragm; the shell comprises a base and a rear shell, wherein the base comprises a base plate, a base extending wall and a first fixing edge, the base extending wall is bent and extended from the outer peripheral edge of the base plate, and the first fixing edge is bent and extended from one side, far away from the base plate, of the base extending wall; the rear shell comprises a rear shell plate, a rear shell extension wall and a second fixing edge, wherein the rear shell extension wall is bent and extended from the periphery of the rear shell plate, the second fixing edge is bent and extended from the rear shell extension wall, the first fixing edge is abutted against the second fixing edge and is fixedly connected to form a seal, the base is provided with a sounding port, and the sounding port 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, the rear shell is provided with a leakage hole, and the rear sound cavity is communicated with the outside through the leakage hole. Compared with the prior art, the utility model discloses a sounding device acoustic performance is excellent, and 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 acoustic performance is good, and user experience is effectual.

In order to achieve the above object, the present invention provides a sound-producing device, which comprises a housing having an accommodating space and a sound-producing unit accommodated in the accommodating space, wherein the sound-producing unit comprises a vibrating diaphragm for vibrating sound production,

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;

the base is provided with a base plate which is attached and fixed to one side, away from the rear shell, of the sounding monomer, a base extending wall which is bent and extended towards the direction of the rear shell from the periphery of the base plate along the periphery of the sounding monomer, and a first fixing edge which is bent and extended towards the direction away from the sounding monomer from one side, away from the base plate, of the base extending wall;

the rear shell comprises a rear shell plate, a rear shell extension wall and a second fixed edge, the rear shell plate is located on one side, far away from the base, of the sounding monomer, the rear shell plate is spaced from the sounding monomer, the rear shell extension wall extends in a bending mode from the periphery of the rear shell plate to the base direction along the peripheral side of the sounding monomer, the second fixed edge extends in a bending mode from one side, far away from the rear shell plate, of the rear shell extension wall to the direction far away from the sounding monomer, and the first fixed edge abuts against the second fixed edge and is fixedly connected to form sealing;

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

Preferably, the first fixing edge is bent and extended in a direction perpendicular to the base extension wall, and the second fixing edge is bent and extended in a direction perpendicular to the rear housing extension wall.

Preferably, a width of the first fixing edge perpendicular to the vibration direction of the diaphragm is greater than or equal to twice a thickness of the base extension wall perpendicular to the vibration direction of the diaphragm, and a width of the second fixing edge perpendicular to the vibration direction of the diaphragm is greater than or equal to twice a thickness of the rear housing extension wall perpendicular to the vibration direction of the diaphragm.

Preferably, the sounding device further comprises a rubber ring located at the joint of the first fixing edge and the second fixing edge, and the rubber ring is glued and fixed with the first fixing edge and the second fixing edge respectively to form sealing.

Preferably, the housing is made of a metal material.

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

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 generating device further comprises a conductive member, the conductive member includes two electrical paths, one of the electrical paths is used for connecting the sound generating unit with an external electrical signal, and the other electrical path is used for connecting the housing 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 sounding unit comprises a basin frame, a vibration system and a magnetic circuit system, the vibration system is respectively supported and fixed on the basin frame, the magnetic circuit system drives the vibration system to vibrate and sound, and the vibrating diaphragm is fixed on the basin frame; the rear shell extension wall and/or the base extension wall are/is attached to the basin rack; or the rear shell extension wall and/or the base extension wall and at least one side of the basin rack are provided with a space, and the space is less than 3 times of the thickness of the shell.

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

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 4/5.

Preferably, the sound production device further comprises a front cover facing the diaphragm, the front cover, the base and the diaphragm together enclose a front sound cavity, the front cover is provided with a sound hole penetrating through the front cover along the vibration direction, and the front sound cavity is connected with the outside through the sound hole.

Preferably, the base plate is fixed to one side of the periphery of the front cover, which is far away from the vibrating diaphragm, in a pressing manner, and the front cover penetrates through the sounding port and is exposed out of the base.

Preferably, the sound production device further comprises a first air-permeable damping member attached to the front cover, and the first air-permeable damping member completely covers the sound hole.

Preferably, the sound production monomer still includes the basin frame, the vibrating diaphragm is fixed in the part of basin frame is equipped with to being close to the convex annular sealed boss that is of protecgulum direction, the protecgulum is pressed and is located sealed boss forms sealedly.

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 plate at a distance, a partition extending part bent and extending from the periphery of the partition body to the direction of the rear shell plate, and a partition fixing part bent and extending from one end of the partition extending part far away from the partition body; the spacer extending part and the rear shell extending wall are arranged at intervals, and the spacer fixing part is fixed on the rear shell plate; the breathable isolating piece and the rear shell plate 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.

Compared with the prior art, the utility model discloses an among the sound production device, it is including the casing that has accommodating space and accept in accommodating space's sound production monomer, through designing into the casing that base and backshell are covered respectively and locate sound production monomer's relative both sides, just the backshell board, backshell extension wall, base extension wall and sound production monomer enclose into the back sound chamber jointly, the backshell sets up the leakage hole and will back sound chamber and external world intercommunication, above-mentioned structure has formed inclosed back sound chamber structure, and not only simple structure, whole size increase are little, and make the acoustics effect of sound production device more excellent, and inclosed back sound chamber structure makes base and backshell can be used to shake, thereby has avoided the production of shell vibration phenomenon behind this sound production device to apply to mobile terminal, makes user experience effect better; in addition, first fixed limit with during the fixed limit fixed connection of second, strengthened the joint strength of base and backshell, fixed effect is better, and the reliability 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 an exploded view of another part of the sound device of the present invention;

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

fig. 5 is a cross-sectional view of another embodiment of the sound device of the present invention;

FIG. 6 is a cross-sectional view of another derivative embodiment of FIG. 5;

fig. 7 is a schematic perspective view of a sound device according to another embodiment of the present invention;

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

FIG. 9 is a cross-sectional view of another embodiment 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 structural view of a derivative embodiment of the embodiment shown in FIG. 10;

FIG. 12 is a schematic structural view of a sealing boss provided on a middle diaphragm of the sound generating device shown in FIG. 1;

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 50 having an accommodating space 40, and a sound generating unit 30 accommodated in the accommodating space 40.

The sounding monomer 30 comprises a basin frame 1, a vibration system 2 and a magnetic circuit system 3, wherein the vibration system 2 is fixedly supported on the basin frame 1 respectively, the magnetic circuit system 3 is used for driving the vibration system 2 to vibrate and sound, and the vibration system 2 and the magnetic circuit system 3 are fixedly supported on the basin frame 1 respectively and jointly form a sounding inner cavity 3 a. The vibration system 2 comprises a vibrating diaphragm 21 fixed on the basin stand 1, and the vibrating diaphragm 21 is used for vibrating and sounding. The magnetic circuit system 3 includes a recess 31 formed by recessing a side thereof away from the diaphragm 21, a leakage portion 32 penetrating the recess 31, and a second air-permeable damping member 33 attached in the recess 31 and completely covering the leakage portion 32, so as to balance the air pressure.

Specifically, the magnetic circuit system 3 is rectangular, the four grooves 31, the leakage portion 32 and the second air-permeable damping member 33 are respectively disposed at four corners of the magnetic circuit system 3, and the four grooves 31 are in one-to-one correspondence.

In this embodiment, the sound generating device 100 further includes a front cover 6, the front cover 6 is disposed opposite to the vibrating diaphragm 21, and the front cover 6, the base 4 and the vibrating diaphragm 21 together enclose a front sound cavity 20, the front cover 6 is provided with a sound hole 61 penetrating through the front cover along the vibration direction, the front sound cavity 20 is connected with the outside through the sound hole 61, and the structural arrangement improves the medium-frequency and high-frequency performance of the sound generating device 100; the sound holes 61 are arranged in an array and include a plurality of holes for improving sound stability and balance. Or, the front cover 6 is not a part of the sound generating device 100, but is a part of the sound generating unit 30, for example, the sound generating unit 30 further includes a front cover 6 covering the basin stand 1 near one side of the vibrating diaphragm 21 and enclosing the front sound cavity 10 with the vibrating diaphragm 21, the front cover 6 is provided with a sound hole 61 penetrating through the front cover along the vibration direction, the sound hole 61 connects the front sound cavity 10 with the outside, and the front cover 6 belongs to a part of the sound generating unit 30, that is, the sound generating unit 30 is provided with the front cover 6.

The first air-permeable damping member 7 is attached to the front cover 6 to completely cover the sound hole 61, on one hand, the first air-permeable damping member is used for preventing foreign matters from entering the front sound cavity 20, and on the other hand, the medium-frequency and high-frequency performance of the sound generating device 100 can be adjusted by adjusting the damping of the first air-permeable damping member 7.

Because the part (i.e. the gluing surface) of the diaphragm 21 fixed on the frame 1 has a small area and a narrow width, the reliability of the sealing is poor. Therefore, in the sound generator 100, as shown in fig. 12, the annular sealing boss 211 protruding toward the front cover 6 is provided at the portion where the diaphragm 21 is fixed to the frame 1, and when the sound generator is assembled, the front cover 6 is pressed on the sealing boss 211 and forms a seal by compressing the sealing boss 211, so that the sealing reliability is better.

With continuing reference to fig. 1-4, the ratio of the thickness of the housing 50 to the thickness of the frame 1 is less than 0.4, so as to increase the dimension of the sound-producing device 100 in the direction perpendicular to the vibration direction as small as possible while satisfying the structural strength of the housing 50; but also ensures that the structural strength of the basin stand 1 is ensured and the occupied space and volume are as small as possible.

Specifically, casing 50 includes base 4 and backshell 5, and base 4 and backshell 5 are followed the vibration direction of vibrating diaphragm 21 covers respectively and locates sound production monomer 30's relative both sides, and this embodiment base 4 and backshell 5 are followed the vibration direction of vibrating diaphragm 21 is that the lid is located the relative both sides of basin frame 1, base 4 and backshell 5 can be made by any one of materials such as metal, plastics, glass, pottery.

The base 4 comprises a base plate 41 which is fixedly attached to one side of the sounding monomer 30, which is far away from the rear shell 5, a base extension wall 42 which is bent and extended from the outer periphery of the base plate 41 along the peripheral side of the basin stand 1 to the direction of the rear shell 5, and a first fixing edge 43 which is bent and extended from one side of the base extension wall 42, which is far away from the base plate 41, to the direction of the basin stand 1, wherein the base plate 41 comprises a sounding port 410 which penetrates through the base plate, the sounding port 410 is communicated with the vibrating diaphragm 21, and the vibrating diaphragm 21 is arranged right opposite to the sounding port 410; of course, the sound emitting port 410 is not limited to be disposed on the base plate 41, and may be disposed on the base extension wall 42 according to actual requirements. In this embodiment, the base plate 41 is fixed to one side of the periphery of the front cover 6, which is far away from the diaphragm, by pressing, the front cover 6 partially penetrates through the sound emitting port 410 and partially exposes out of the base 4, that is, the diaphragm 21 vibrates and emits sound sequentially through the sound emitting port 410 of the base plate, the sound hole 61 of the front cover 6 and the first air-permeable damping member 7 to form a front sound emitting structure.

The backshell 5 is including being located sound production monomer 30 is kept away from base 4 one side and with the backshell board 51 of basin frame 1 interval, by the periphery of backshell board 51 is followed 1 week side of basin frame is to the backshell that the base 4 direction was buckled and is extended wall 52 and by the backshell extends wall 52 and keeps away from one side of backshell board 51 is to keeping away from the fixed limit 53 of second that the basin frame 1 direction was buckled and is extended. The area ratio of the orthographic projection of the sound generating unit 30 to the rear shell 5 along the vibration direction of the diaphragm 21 to the rear shell 5 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 realizing vibration absorption and improving low-frequency acoustic performance of the formed rear sound cavity 10.

In this embodiment, the back shell plate 51 is provided with a leakage hole 510 penetrating through the back shell plate, the leakage hole 510 connects the back sound cavity 10 with the outside, and the leakage hole 510 is not limited to be provided on the back shell plate 51, and may also be provided on the back shell extension wall 52 according to actual needs.

Specifically, the extending direction of the rear housing extending wall 52 is parallel to the vibration direction of the diaphragm 21, and the extending direction of the base extending wall 42 is parallel to the vibration direction of the diaphragm 21.

The first fixing edge 43 is bent and extended along a direction perpendicular to the base extension wall 42, and the second fixing edge 53 is bent and extended along a direction perpendicular to the rear housing extension wall 52; the first fixing edge 43 abuts against the second fixing edge 53 and is fixedly connected to form a seal. Because the first fixing edge and the second fixing edge 43 extend in a bending manner in a direction away from the housing 50, the connecting area between the rear shell 5 and the base 4 is increased, so that the bonding strength between the rear shell 5 and the base 4 is improved, and the structural stability of the sound generating device 100 is enhanced; in addition, because the rear shell 5 and the base 4 need to be abutted and then fixed in the assembling process of the sound production device 100, the increased connecting area is also beneficial to abutting and positioning of the rear shell 5 and the base 4. Preferably, the first fixing edge 43 and the second fixing edge 53 are fixed by gluing, that is, the first fixing edge 43 and the second fixing edge 53 are bent and extended along the direction perpendicular to the vibration direction, and then are fixed by gluing, so that the reliability is better and the processing is simple.

The width of the first fixing edge 43 in the direction perpendicular to the vibration direction of the vibrating diaphragm 21 is greater than or equal to twice the thickness of the base extension wall 42 in the direction perpendicular to the vibration direction of the vibrating diaphragm 21, and the width of the second fixing edge 53 in the direction perpendicular to the vibration direction of the vibrating diaphragm 21 is greater than or equal to twice the thickness of the rear housing extension wall 52 in the direction perpendicular to the vibration direction of the vibrating diaphragm 21, at this time, the first fixing edge 43 and the second fixing edge 53 achieve a fixing function and simultaneously do not occupy the space of the whole sound generating device 100 in the direction perpendicular to the vibration direction, and the sound generating device is small in size and quick to position.

In this embodiment, the rubber ring 8 is located at the joint of the first fixing edge 43 and the second fixing edge 53 and is glued and fixed with the first fixing edge 43 and the second fixing edge 53 to form a seal, so that the seal of the first fixing edge 43 and the second fixing edge 53 is further enhanced, and the sealing performance is better.

In this embodiment, the rear shell plate 51, the rear shell extension wall 52, the base extension wall 42 and the sound generating unit 30 together enclose a rear sound cavity, and the leakage portion 32 is communicated with the rear sound cavity 10, so that the sound generating inner cavity 3a is communicated with the rear sound cavity 10 through the leakage portion 32, so as to improve the low-frequency acoustic performance of the sound generating device. The rear shell plate 51 is provided with a leakage hole 510 penetrating through the rear shell plate, and the rear sound cavity 10 is communicated with the outside through the leakage hole 510 for balancing sound pressure. Therefore, the utility model discloses an above-mentioned sound production device 100 has then formed relative 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 is because of the existence of back sound cavity 10 structure, makes sound production device 100 can not make mobile terminal class of electronic product produce the shell phenomenon of shaking after applying to mobile terminal class of electronic product, has effectively increased customer's user experience effect.

The base 4 and the rear shell 5 are made of metal materials, and are made of steel sheets with the thickness of 0.15mm, compared with other materials, the base 4 and the rear shell 5 made of metal materials are thinner and have higher strength, at least part of the shell 50 is grounded to form a shielding cover, so that the shielding cover is prevented from being interfered by external electromagnetic waves, and the working reliability is better. Of course, the material of the base 4 and the rear case 5 is not limited thereto, and may be other materials, such as plastic, glass, ceramic, and the like.

A space a is arranged between the base extending wall 42 and/or the rear shell extending wall 52 and at least one side of the basin frame 1, and the space a is less than 3 times the thickness of the shell 50; preferably, the distance a is less than or equal to 1/3 of the width of the fixing surface of the diaphragm 21 fixed on the frame 1; to increase the volume of the rear acoustic chamber 10 and further improve the acoustic performance. Specifically, the distance a between the base extension wall 42 and the basin frame 1 is less than or equal to 1/3 of the width of the fixing surface of the diaphragm 21 fixed on the basin 1 frame, and the distance a between the rear shell extension wall 52 and the basin frame 1 is less than or equal to 1/3 of the width of the fixing surface of the diaphragm 21 fixed on the basin 1 frame, so as to facilitate assembly. Of course, the base extension wall 42 and/or the rear housing extension wall 52 may also be conformed to the frame 1.

For example, the distance a between the base extension wall 42 and the frame 1 is less than or equal to 0.05mm, and similarly, the distance a between the rear shell extension wall 52 and the frame 1 is also less than or equal to 0.05 mm. The thickness of the base extension wall 42 and the rear housing extension wall 52 is 0.15 mm. In this embodiment, the interval a between the base extension wall 42 and the frame 1 and the interval a between the rear case extension wall 52 and the frame 1 are both set to 0.05 mm. After the structure is arranged, under the condition of ensuring the structural stability, the increased size of the single side of the sounding device 100 is relatively minimum, and the sounding device is not influenced and is applied to the portable mobile terminal electronic product.

Fig. 5 is a cross-sectional view of another embodiment of the sound production device of the present invention. The main difference in this embodiment is that the base 54 and the rear housing 55 are both made of a metal material, such as steel, iron, copper, etc.; and a conductive member 501 is provided. For example, the base 54 and the rear case 55 are made of steel sheets having a thickness of 0.15 mm. The base 54 and the rear housing 55 are made of metal material, which can be made thinner with the same structural strength, thereby further reducing the horizontal dimension of the sound device 500 perpendicular to the vibration direction.

Specifically, the sounding device 500 further includes a conductive member 501, one end of the conductive member 501 is connected to the base 54 and/or the rear case 55, and the other end of the conductive member 501 is grounded, so as to form a shielding effect, so that the sounding unit 500 is prevented from being interfered by external electromagnetic waves, and the working reliability is better.

Referring to fig. 6, which is a sectional view of another derivative embodiment of fig. 5, in the sound-producing device 600, i.e., the conductive member 601 is integrally formed with the base 64 and/or the rear housing 65, for example, the conductive member 601 is formed by extending the base 64 and/or the rear housing 65 in a direction away from the basin stand and is located outside the base 64 and the rear housing 65.

Fig. 7-8 are schematic perspective views of another embodiment of the sound generating device of the present invention. This embodiment differs from the embodiment shown in fig. 5 in that the conductive member 701 differs in structure and function in the sound producing device 700. The conductive member 701 includes two electrical paths, one of the electrical paths is used to connect the sound generating unit 702 with an external electrical signal and to supply power to the sound generating unit 702, and the other electrical path is used to connect the housing 703 with the ground, so as to form a shield for the sound generating unit 702. In this embodiment, the conductive member 701 is used to form a shielding function together with the housing 703, and is also used to supply power to the sounding unit 702, so that the structure is simpler and dual functions can be realized.

Specifically, the rear shell 75 includes a gap 7520 penetrating therethrough, and the conductive member 701 includes a first arm 7011 fixed in the gap 7520, a second arm 7012 extending from opposite ends of the first arm 7011 toward the direction of the frame 71, a third arm 7013 extending from the first arm 7011 toward the direction away from the frame 71, and a fourth arm 7014 extending from the first arm 7011 toward the direction away from the frame 71. The third arm 7013 is formed by extending the first arm 7011 in a direction perpendicular to the vibration direction, and the fourth arm 7014 is formed by bending and extending the first arm 7011 in the vibration direction and in a direction close to the rear case 75.

The first arm 7011 is electrically connected to the base 74 and/or the rear case 75, that is, the base extension wall 743 and/or the rear case extension wall 752; the second arm 7012 is fixed to the frame 71 and electrically connected to the sounding unit 702; the third arm 7013 is used for connecting external electrical signals; the fourth arm 7014 is used for grounding.

FIG. 9 is a cross-sectional view of another embodiment of FIG. 4. The main difference is that the sound generating device 800 generates sound from the front side to form a side sound generating structure.

The sound generating device 800 includes a sound guiding housing 801 covering the sound generating unit 86 far from the rear housing 85, the sound guiding housing 801 has a sound guiding cavity 820 forming a side sound generating structure 830, and the sound guiding cavity 820 is communicated with the diaphragm 821. This side vocal structure 830 can be better the guide sound production, is convenient for the front sound production to be used under the condition of keeping off, uses the flexibility higher specifically, leads the sound shell 801 and is located base 84 and keeps away from one side of backshell 85.

Specifically, the sound guiding shell 801 includes a sound guiding shell plate 8011 spaced from and facing the base plate 841, and a sound guiding shell extending wall 8012 bent and extended from the periphery of the sound guiding shell plate 8011 to the base extending wall 842 and supported and fixed to the periphery of the base plate 841, so as to form a side sound emitting structure, which is convenient for flexible application with different installation positions. In this case, it is understood that the sound guide 801 is a component of the sound generating device 800, and does not belong to the housing 845.

It is also possible to understand the sound guiding shell 801 as a part of the housing 845, that is, the sound guiding shell 801 may be a part of the housing 845, in this case, the housing 845 and the sound generating unit 86 further enclose a sound guiding cavity 820 forming the side sound generating structure 830, and the sound guiding cavity 820 is communicated with the diaphragm 821.

As shown in fig. 10, the sound generating device 900 further includes a gas-permeable spacer 907 located in the rear sound cavity 9010, wherein the gas-permeable spacer 907 is attached to the sound generating unit 908 and separates the sound generating unit 908 from the rear sound cavity 9010. Specifically, the breathable separator 907 includes a separator body 9071 disposed opposite to the rear casing 9011 at a distance, a separator extension portion 9072 bent and extended from the periphery of the separator body 9071 toward the rear casing 9011, and a separator fixing portion 9073 bent and extended from one end of the separator extension portion 9072 away from the separator body 9071.

The spacer extension part 9072 is spaced apart from the rear shell extension wall 9012, and the spacer fixing part 9073 is fixed to the rear shell plate 9011; the breathable partition 907 and the rear shell plate 9011 together enclose a powder filling space 901. The structure that the spacer extension 9072 and the rear shell extension wall 9012 are arranged at an interval can effectively increase the ventilation smoothness of the rear sound cavity 9010 and improve the stability of low-frequency sound production performance.

Please refer to fig. 11, which is a schematic structural diagram of a derivative embodiment of the embodiment shown in fig. 10. In the sounding device 900a, one side of the spacer body 9071a close to the sounding single body 902a is recessed towards the direction far away from the sounding single body 902a to form an avoidance step 9074a, and the avoidance step 9074a is arranged opposite to the leakage part 9024 a. This structural arrangement can make the leakage of the sounding inner cavity 9104a of the sounding monomer 902a 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 generating device 1000a further includes at least two positioning pieces 8a and respectively connected to the housing 1001 a. One end of the positioning plate 8a, which is far away from the housing 1001a, is provided with a positioning hole 81a penetrating through the positioning plate, which is used for fixing and positioning the sound generating device 1000a and an application terminal whole machine, for example, a threaded hole, and a screw can be fixed on the terminal whole machine through the positioning hole 81a, so that the terminal whole machine is simple and convenient to use, and at least two positioning plates 8a are arranged, so that positioning and fixing can be more effectively formed. In order to further improve the fixing stability, the two positioning pieces 8a are connected to two opposite sides or two pairs of corners of the housing 1001a, and the sound generating device 1000a and the terminal complete machine are symmetrically arranged to achieve a better positioning and fixing effect. In the present embodiment, positioning piece 8a is fixed to case 1001a by welding, that is, positioning piece 8a and case 1001a are separate structures of two components.

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 1100a of the present embodiment and the embodiment shown in fig. 13 is that the positioning piece 1118a is formed by extending the housing 1111a outward, i.e. the positioning piece 1118a and the housing 1111a are integrally formed, so that the forming is simple, the number of devices is reduced, and the assembly efficiency is improved.

Compared with the prior art, the utility model discloses an among the sound production device, it is including the casing that has accommodating space and accept in accommodating space's sound production monomer, through designing into the casing that base and backshell are covered respectively and locate sound production monomer's relative both sides, just the backshell board, backshell extension wall, base extension wall and sound production monomer enclose into the back sound chamber jointly, the backshell sets up the leakage hole and will back sound chamber and external world intercommunication, above-mentioned structure has formed inclosed back sound chamber structure, and not only simple structure, whole size increase are little, and make the acoustics effect of sound production device more excellent, and inclosed back sound chamber structure makes base and backshell can be used to shake, thereby has avoided the production of shell vibration phenomenon behind this sound production device to apply to mobile terminal, makes user experience effect better; in addition, first fixed limit with during the fixed limit fixed connection of second, strengthened the joint strength of base and backshell, the better fixed effect of reliability is better, has strengthened the structural stability of vocal device, and is favorable to the location butt of base and backshell, improves the assembly efficiency of product.

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 shell with an accommodating space and a sound production unit accommodated in the accommodating space, wherein the sound production unit comprises a vibrating diaphragm for vibrating and producing sound,

2. The sounder device according to claim 1, wherein the first fixing edge extends in a bent manner perpendicular to the base extension wall, and the second fixing edge extends in a bent manner perpendicular to the rear housing extension wall.

3. The sounding device according to claim 2, wherein a width of the first fixing edge perpendicular to the vibration direction of the diaphragm is equal to or greater than twice a thickness of the pedestal extension wall perpendicular to the vibration direction of the diaphragm, and a width of the second fixing edge perpendicular to the vibration direction of the diaphragm is equal to or greater than twice a thickness of the back case extension wall perpendicular to the vibration direction of the diaphragm.

4. The sounder device according to claim 1, further comprising a rubber ring at a junction of the first and second retaining edges, the rubber ring being adhesively secured to the first and second retaining edges, respectively, to form a seal.

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

6. A sound-producing device according to claim 5, wherein the housing is made of 0.15mm thick steel sheet.

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

8. The sounder device according to claim 5, 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 5, 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 5, 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 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 diaphragm is fixed on the basin frame; the rear shell extension wall and/or the base extension wall are/is attached to the basin rack; or the rear shell extension wall and/or the base extension wall and at least one side of the basin rack are provided with a space, and the space is less than 3 times of the thickness of the shell.

14. The sounder device according to claim 13, wherein the spacing is less than or equal to 1/3 of the width of the fixing surface of the diaphragm to the frame.

15. The sounder device according to claim 13, wherein a ratio of a thickness of the housing to a thickness of the basket is less than 0.4.

16. 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 4/5.

17. The sound production device of claim 1, further comprising a front cover facing the diaphragm, wherein the front cover, the base and the diaphragm together define a front sound cavity, and the front cover is provided with a sound hole penetrating therethrough along the vibration direction, and the sound hole connects the front sound cavity with the outside.

18. The sound production device as claimed in claim 17, wherein the base plate is press-fitted to a side of the periphery of the front cover away from the diaphragm, and the front cover passes through the sound-emitting opening and is exposed to the base.

19. The sounder device according to claim 17 or 18, further comprising a first air permeable damper affixed to the front cover, the first air permeable damper completely covering the sound aperture.

20. The sound production device according to claim 17 or 18, wherein the sound production unit further comprises a basin frame, the diaphragm is fixed on the basin frame, an annular sealing boss protruding towards the direction close to the front cover is arranged on the part of the diaphragm fixed on the basin frame, and the front cover is pressed on the sealing boss to form a seal.

21. 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.

22. 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.

23. 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.

24. The sound production device of 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 shell plate at a distance, a spacer extension portion extending from the periphery of the spacer body in a bending manner toward the rear shell plate, and a spacer fixing portion extending from one end of the spacer extension portion away from the spacer body in a bending manner; the spacer extending part and the rear shell extending wall are arranged at intervals, and the spacer fixing part is fixed on the rear shell plate; the breathable isolating piece and the rear shell plate jointly enclose a powder filling space.

25. The sound production device according to claim 24, 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.