CN213028516U

CN213028516U - Sound production device

Info

Publication number: CN213028516U
Application number: CN202020964949.4U
Authority: CN
Inventors: 曹成铭; 沈凯华; 吴树文; 吴立峰
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-04-20
Anticipated expiration: 2030-05-29
Also published as: WO2021237837A1

Abstract

The utility model provides a sounding device, which comprises a sounding monomer, wherein the sounding monomer comprises a vibrating diaphragm and a front cover fixed on one side of the sounding monomer, which is close to the vibrating diaphragm, and the front cover and the vibrating diaphragm jointly enclose a sounding cavity; the sounding device also comprises a rear shell which is fixedly connected with the front cover and arranged around the sounding monomer; the front cover comprises a front cover plate and a sound outlet hole, wherein part of the front cover plate is fixed on the sound generating monomer, and the sound outlet hole penetrates through the front cover plate and communicates the sound outlet cavity with the outside; the backshell includes and extends the wall with the backshell board of sound production monomer spaced and by the backshell that the backshell board extends to the protecgulum extension of buckling of protecgulum along sound production monomer week side, backshell extension wall fixed connection be close to on the bottom surface of vibrating diaphragm one side and form sealedly with the protecgulum, the backshell encloses into the back vocal chamber with the sound production monomer jointly, the sound production monomer is equipped with the portion of revealing with the intercommunication of back vocal chamber, the backshell is equipped with the leakage hole with back vocal chamber and external intercommunication, leaks the hole. Compared with the prior art, the utility model discloses a sounding device simple structure, acoustic performance are 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 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 includes a sound generating unit, wherein the sound generating unit includes a vibrating diaphragm for vibrating and generating sound and a front cover fixed on one side of the sound generating unit close to the vibrating diaphragm, and the front cover and the vibrating diaphragm together enclose a sound generating cavity; the sounding device also comprises a rear shell which is fixedly connected with the front cover and arranged around the sounding monomer;

the front cover comprises a front cover plate and a sound outlet hole, wherein part of the front cover plate is attached and fixed on the sound generating single body, the sound outlet hole penetrates through the front cover plate, and the sound outlet cavity is communicated with the outside through the sound outlet hole;

the backshell include with sound production monomer spaced backshell board and by the backshell board is followed sound production monomer week side direction the backshell that the protecgulum was buckled and is extended the wall, backshell extend wall fixed connection in the protecgulum is close to on the bottom surface of vibrating diaphragm one side and with the protecgulum forms sealedly, the backshell with sound production monomer encloses into the back vocal chamber jointly, sound production monomer be equipped with the portion of revealing of back vocal chamber intercommunication, the backshell is equipped with runs through the leak hole above that, leak the hole will back vocal chamber and external intercommunication.

Preferably, the front cover further includes a sound board disposed opposite to the diaphragm at an interval and a connection wall extending from the sound board to the diaphragm in a bending manner, the front cover board is formed by extending the connection wall in a bending manner, and the sound hole penetrates through the sound board.

Preferably, the front cover plate is pressed on the diaphragm.

Preferably, one side of the vibrating diaphragm, which is close to the front cover, protrudes to form an annular sealing boss, and the front cover plate is pressed on the sealing boss to form sealing.

Preferably, the front cover and the rear shell are both made of metal materials.

Preferably, the front cover or the rear case is at least partially used for grounding.

Preferably, the sound production device further comprises a conductive member, one end of the conductive member is connected to the front cover and/or the rear housing, and the other end of the conductive member is used for grounding.

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

Preferably, the sound generating device further comprises a conductive member, wherein the conductive member comprises 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 grounding the front cover and/or the rear shell.

Preferably, the sound production device further comprises at least two positioning pieces, the at least two positioning pieces are connected to two opposite sides or two pairs of corners of the rear shell, and one end, far away from the rear 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 rear shell outwards.

Preferably, the sound production device further comprises a sound guide shell, wherein the front cover is arranged on the front cover and is far away from one side of the rear shell, the sound guide shell is provided with a sound guide cavity forming a side sound production structure, and the sound guide cavity is communicated with the sound outlet cavity through the sound outlet hole.

Preferably, the front cover further comprises a sound guide cavity forming a side sound production structure, and the sound guide cavity is communicated with the sound production cavity through the sound production hole.

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 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 front cover and the rear shell are both made of steel sheets with the thickness of 0.15 mm.

Preferably, the sounding unit further comprises a basin stand, the vibrating diaphragm is attached and fixed to the basin stand, the front cover is fixed to one side, close to the vibrating diaphragm, of the basin stand, and the extending wall of the rear shell surrounds the periphery of the basin stand; the thickness of the extending wall of the rear shell is smaller than that of the basin rack; and a space is arranged between the rear shell extension wall and at least one side of the basin frame, and the space is less than 3 times of the thickness of the rear shell extension wall.

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 projection plane of the rear shell is at least 4/5.

Preferably, the front cover plate comprises a first section fixed on the basin frame and a second section which is extended by the outer periphery of the first section in a protruding mode and is far away from the basin frame along the vertical vibration direction, and the distance between the outer end face of the second section and the basin frame is smaller than or equal to 0.20 mm.

Compared with the prior art, the utility model discloses an in the sounder, through the backshell that fixed connection in the protecgulum and set up around the basin frame, make backshell, protecgulum and sound production monomer enclose into the back sound chamber jointly, the backshell sets up the leakage hole that communicates back sound chamber with the external world, above-mentioned structure has formed inclosed back sound chamber structure, not only simple structure, whole along the horizontal dimension increase perpendicular to the direction of vibration little, and make the acoustical effect of sounder more excellent, and inclosed back sound chamber structure makes protecgulum and backshell can be used for absorbing vibration, thereby make this sounder apply to and avoid the production of shell phenomenon of shaking behind the mobile terminal, make user experience effect better; in addition, a sound outlet cavity is formed by enclosing the front cover and the vibrating diaphragm together, so that the vibrating diaphragm can vibrate and sound in the sound outlet cavity, namely the vibrating diaphragm can vibrate and sound in an independent cavity, and the adverse effect of the external environment on the vibration of the vibrating diaphragm is avoided as much as possible, so that the reliability of vibration and sound is ensured.

[ 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 an enlarged view of a portion indicated by C in FIG. 3;

FIG. 5 is a sectional view taken along line B-B of FIG. 1;

fig. 6 is a schematic cross-sectional view of a diaphragm provided with a sealing boss according to a first embodiment of the present invention;

FIG. 7 is an enlarged view of a portion D of FIG. 6;

FIG. 8 is a schematic perspective view of the diaphragm shown in FIG. 6;

fig. 9 is a schematic cross-sectional view of a second embodiment of the sound device according to the present invention;

fig. 10 is a schematic cross-sectional view of a third embodiment of the sound device according to the present invention;

fig. 11 is a schematic cross-sectional view of a fourth embodiment of the sound device of the present invention;

fig. 12 is a schematic view illustrating an assembly of a sound generating unit and a conductive member according to a fourth embodiment of the present invention;

fig. 13 is a schematic cross-sectional view of a fifth embodiment of the sound device of the present invention;

fig. 14 is a schematic cross-sectional view of a sixth embodiment of the sound device of the present invention;

FIG. 15 is a schematic structural view of a derivative embodiment of the sixth embodiment shown in FIG. 14;

fig. 16 is a schematic perspective view of a seventh embodiment of the sound generating device according to the present invention;

fig. 17 is a schematic perspective view of a derivative embodiment of the seventh embodiment shown in fig. 16.

[ 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.

Implementation mode one

Referring to fig. 1-5, the present invention provides a sound generating device 100, which includes a sound generating unit 1 and a rear housing 2.

The sounding unit 1 includes a frame 11, a vibration system 12, a magnetic circuit system 13, and a front cover 14, and is provided with a leakage 1310.

In the present embodiment, the vibration system 12 and the magnetic circuit system 13 are respectively supported and fixed on the frame 11 and together enclose a sound-emitting cavity 103, and the magnetic circuit system 13 drives the vibration system 12 to vibrate and emit sound.

The vibration system 12 includes a diaphragm 121 fixed on the frame 11 and used for vibrating and sounding, and a voice coil 122 connected to the diaphragm 121, the magnetic circuit system 13 includes a yoke 131 fixed on one side of the frame 11 away from the diaphragm 121, and a magnetic steel unit 132 fixedly supported on the yoke 131 and forming a magnetic gap 130, the leakage portion 1310 is disposed through the yoke 131, and the voice coil 122 is inserted in the magnetic gap 130 and used for driving the diaphragm 121 to vibrate and sound.

More specifically, the diaphragm 121 includes a vibrating portion 1211 connected to the voice coil 122, a corrugated rim portion 1212 extending from an outer periphery of the vibrating portion 1211 in a direction away from the vibrating portion 1211, and a fixing portion 1213 extending from the corrugated rim portion 1212 in a direction away from the vibrating portion 1211, wherein the fixing portion 1213 is fixed to the frame 11.

The front cover 14 covers the basin frame 11 fixed on the sound generating unit 1 and is close to one side of the vibrating diaphragm 121, the front cover 14 and the vibrating diaphragm 121 together enclose a sound generating cavity 101, and the rear shell 2 is fixedly connected to the front cover 14 and surrounds the basin frame 11.

The front cover 14 comprises a front cover plate 143 partially attached and fixed on the sound generating unit 1 and a sound outlet 140 penetrating through the front cover plate, and the sound outlet 140 communicates the sound outlet cavity 101 with the outside; more specifically, the front cover 14 includes a sound emitting plate 141 disposed opposite to the vibrating diaphragm 121 at an interval, a connecting wall 142 extending from the sound emitting plate 141 to the vibrating diaphragm 121 in a bending manner along a vibration direction, and a front cover 143 extending from the connecting wall 142 in a bending manner along a vertical vibration direction, the front cover 143 is covered and fixed on the basin frame 11 and is pressed on one side of the vibrating diaphragm 121 away from the basin frame 11, the sound emitting hole 140 penetrates through the sound emitting plate 141 along the vibration direction of the vibrating diaphragm 121, the vibrating diaphragm 121 faces the sound emitting hole 140, and the sound emitting hole 140 communicates the sound emitting cavity 101 with the outside, which improves the middle-frequency and high-frequency performance of the sound emitting device 100; on the other hand, through the setting of the front cover 14, the vibrating diaphragm 121 vibrates and sounds in the sound-emitting cavity 101, that is, the vibrating diaphragm 121 vibrates and sounds in an independent cavity, so that adverse effects of external environment on the vibration of the vibrating diaphragm 121 are avoided as much as possible, and the reliability of vibration and sound production is ensured. Preferably, in order to improve the reliability of fixing the diaphragm 121, the front cover 143 is pressed against the fixing portion 1213 of the diaphragm 121.

It should be noted that the number and the position of the sound outlet holes 140 are not limited, and may be one or multiple, and the specific number and the position may be determined according to the actual use situation, for example, in the present embodiment, the sound outlet holes 140 include four sound outlet holes 140, and the four sound outlet holes 140 are arranged in an array.

The back shell 2 includes a back shell plate 21 located on a side of the frame 11 away from the diaphragm 121 and spaced from the frame 11, and a back shell extension wall 22 extending from an outer periphery of the back shell plate 21 in a bending manner along a peripheral side of the frame 11 toward the front cover plate 143. The back shell extension wall 22 is fixedly connected to the bottom surface of the front cover plate 143 on the side close to the diaphragm 121 and forms a seal with the front cover plate 143, specifically, the extension direction of the back shell extension wall 22 is parallel to the vibration direction of the diaphragm 121, and the back shell extension wall 22 and the front cover plate 143 are arranged opposite to each other. More specifically, the sealing manner between the front cover plate 143 and the rear housing extension wall 22 is not limited, and may be specifically selected according to the actual use requirement, for example, in the first embodiment, the front cover plate 143 and the rear housing extension wall 22 may be fixed by welding or gluing to form a seal.

Further, the front cover plate 143 includes a first section 1431 and a second section 1432 protruding from the outer periphery of the first section 1431 in the vertical vibration direction, the first section 1431 is fixed to the frame 11 and is pressed on the diaphragm 121, the second section 1432 is a portion of the front cover plate 143 beyond the frame 11, and the second section 1432 is opposite to the rear case extension wall 22 and is fixedly connected with the rear case extension wall 22.

The rear shell 2, the front cover 14, the basin frame 11 and the magnetic circuit system 13 jointly enclose a rear sound cavity 102, the leakage part 1310 is used for communicating the sound production inner cavity 103 with the rear sound cavity 102 so as to improve the low-frequency acoustic performance, the rear shell plate 21 is also provided with a leakage hole 23 penetrating through the vibration direction of the vibrating diaphragm 121, and the leakage hole 23 is used for communicating the rear sound cavity 102 with the outside; more preferably, the sound generating unit 1 further comprises a ventilation damping member 1311 fixed to the yoke 131 and completely covering the leakage portion 1310, the leakage portion 1310 is communicated with the rear sound cavity 102 through the ventilation damping member 1311, the setting of the ventilation damping member 1311 is adopted, not only is the leakage amount of the leakage portion 1310 adjusted, the low-frequency acoustic performance is further improved, but also the foreign matter of the rear sound cavity 102 is effectively blocked to enter the sound generating unit 1, the sound generating reliability of the sound generating unit 1 is guaranteed, and the condition is provided for filling the sound absorbing material in the rear sound cavity 102. Of course, the specific location of the leakage holes is not limited, and in other embodiments, the leakage holes may be disposed through the rear housing extension wall.

Therefore, the utility model discloses an above-mentioned sound production device 100 has then formed confined back sound cavity structure, and its simple structure has improved sound production device 100's acoustic performance on the one hand, especially low frequency acoustic performance, and on the other hand because of the existence of back sound cavity 102 structure, protecgulum 14 and backshell 2 form and inhale the vibration effect for sound production device 100 can not make electronic products such as mobile terminal produce the shell phenomenon of shaking after applying to electronic products such as mobile terminal, has effectively increased customer's user experience effect. Preferably, in order to improve the reliability of fixing the diaphragm 121, the front cover 143 is pressed against the fixing portion 1213 of the diaphragm 121.

In the first embodiment, the front cover 14 and the rear housing 2 are both made of one of metal, ceramic and glass materials, for example, the front cover 14 and the rear housing 2 are made of metal materials, the metal materials include but are not limited to steel, iron, copper, and the like, the front cover 14 and the rear housing 2 together enclose a metal cover, and the front cover 14 or the rear housing 2 is at least partially grounded, so that a shielding effect is formed, the influence of an external electromagnetic field on the vibration and sound production of the sound production unit 1 is reduced, the reliability of the vibration and sound production of the sound production unit 1 is effectively improved, and the sound production performance is effectively improved.

In this embodiment, the thickness of the rear housing 2 is smaller than the thickness of the frame 11, and specifically, the thickness of the rear housing extension wall 22 is smaller than the thickness of the frame 11, so that the structural design makes the rear housing 2 satisfy the structural strength, and the occupied volume in the vibration direction perpendicular to the vibrating diaphragm 121 is smaller, thereby being more beneficial to being applied to a terminal with a small transverse installation space.

Further, a space 110 is provided between the rear case extension wall 22 and at least one side of the tub 11, and the space 110 is less than 3 times the thickness of the rear case extension wall 22. This interval 110 has reserved certain assembly clearance for the assembly of sound production monomer 1, consequently makes sound production monomer 1 assemble to casing 1 more swiftly in, improves assembly efficiency, also can not occupy more the horizontal space that sound production device 100 took in the direction of vibration of perpendicular to simultaneously.

Preferably, the vibration system 12 and the magnetic circuit system 13 are located within the frame 11, and the area ratio of the orthogonal projection of the frame 11 to the rear case 2 along the vibration direction of the diaphragm 121 to the projection plane of the rear case 2 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 102 to realize vibration absorption and improve low-frequency acoustic performance.

It is worth mentioning that the front cover 14 and the rear shell 2 are of a uniform wall thickness structure, and the wall thickness of the front cover 14 and the wall thickness of the rear shell 2 are both 0.15mm, for example, in the first embodiment, the front cover 14 and the rear shell 2 are made of steel sheets with the thickness of 0.15mm through a stretch forming process, so that the thickness of the front cover 14 and the thickness d1 of the rear shell extension wall 22 are both 0.15 mm.

Further, the rear case extension wall 22 is spaced apart from the frame 11 to increase the volume of the rear acoustic chamber 102, further improving acoustic performance. To increase the volume of the rear acoustic chamber 102 to further improve acoustic performance. Specifically, the ratio of the spacing d3 between the rear housing extension wall 22 and the tub shelf 11 to the thickness d1 of the rear housing extension wall 22 is less than or equal to 1/3.

For example, the distance d2 between the outer end face 1430 of the second section 1432 away from the frame 11 and the frame 11 is less than or equal to 0.20mm, that is, the distance between the outer periphery of the front cover plate 143 and the frame 11 is less than or equal to 0.20mm, and the distance d3 between the rear case extension wall 22 and the frame 11 is less than or equal to 0.05 mm.

In the present embodiment, the distance between the outer peripheral edge of the front cover 143 and the bowl frame 11 is set to 0.20mm, and the distance d3 between the rear case extension wall 22 and the bowl frame 11 is set to 0.05 mm. Through the arrangement, under the condition of ensuring the structural strength stability of the rear shell 2, the increasing size of the sounding device 100 along the single side perpendicular to the vibration direction is relatively minimum, the increasing size of the single side is only 0.20mm, and the application of the sounding device in a portable mobile terminal electronic product is not influenced.

Further, in order to electrically connect the sound generating unit 1 located in the rear sound cavity 102 with the outside, in the first embodiment, the sound generating device 100 further includes a conductive member 3 and a soldering terminal 4.

The soldering lug 4 is fixed on one side of the basin frame 11 far away from the vibrating diaphragm 121, the voice coil 122 of the vibrating system 12 is electrically connected with the soldering lug 4, one end of the conductive piece 3 extends to the basin frame 11 through the space between the front cover 14 and the rear shell 2 and is electrically connected with the soldering lug 4, namely, the end is electrically connected with the vibrating system 12 through the soldering lug 4, the other end of the conductive piece 3 is also used for connecting an external electric signal, namely, the voice coil 122 of the vibrating system 12 is powered, namely, the conductive piece 3 transmits the external electric signal to the voice coil 122 through the soldering lug 4, and the voice coil 122 drives the vibrating diaphragm 121 to vibrate and sound under the; more specifically, in the first embodiment, the rear housing extension wall 22 is provided with an opening 220 penetrating therethrough in the vertical vibration direction, and the conductive member 3 extends into the rear acoustic cavity 102 through the opening 220 and is electrically connected to the tab 4.

Further, the conductive member 3 includes a first arm 31 penetrating through the opening 220, a second arm 32 extending from two opposite ends of the first arm 31 toward the sounding unit 1, and a third arm 33 extending from the first arm 31 toward a direction away from the sounding unit 1; the second arm 32 is fixed on the frame 11 of the sounding unit 1 and is electrically connected with the vibration system 12 through the soldering lug 4, and the third arm 33 is located outside the rear sound cavity 102 and is used for connecting external electric signals.

In the above structure, through the opening 220, the conductive member 3 and the soldering lug 4 are electrically connected inside the rear acoustic cavity 102, so that the influence of the external environment on the electrical connection between the conductive member and the soldering lug is effectively avoided, and the reliability of the electrical connection is ensured.

In the first embodiment, since the area of the portion (i.e., the bonding surface) where the diaphragm 121 is fixed to the frame 11 is small and the width is narrow, that is, the area of the fixing portion 1213 is small and the width is narrow, the reliability of the seal between the diaphragm 121 and the front cover plate 143 is poor. Therefore, referring to fig. 6-8, as a preferred embodiment of the present embodiment, a ring-shaped sealing boss 1214 is formed on a side of the diaphragm 121 close to the front cover 14, and during assembly, the front cover plate 143 presses the sealing boss 1214 against the frame 11 and forms a seal by compressing the sealing boss 1214, thereby effectively improving the sealing reliability between the diaphragm 121 and the front cover 14.

Second embodiment

Fig. 9 is a schematic cross-sectional view of a second embodiment of the sound generating device according to the present invention. The sounding device 100a of the second embodiment is substantially the same as the sounding device of the first embodiment, and the same parts are not described again, but the main difference between the sounding device and the first embodiment is that the specific arrangement and functions of the conductive devices are different, and the specific arrangement of the conductive devices of the second embodiment is described below:

in the second embodiment, the front cover 14a and the rear case 2a are both made of a metal material, and the conductive member 3a is provided. For example, the front cover 14a and the rear case 2a are each drawn from a 0.15mm thick steel sheet.

Specifically, the sounding device 100a further includes a conductive component 3a, one end of the conductive component 3a is connected to the front cover 14a and/or the rear case 2a, and the other end of the conductive component 3a is grounded, so as to form a shielding effect, so that the sounding unit 1a is prevented from being interfered by external electromagnetic waves, and the working reliability is better.

Third embodiment

Please refer to fig. 10, which is a schematic cross-sectional view of a third embodiment of the sound generating device of the present invention, the sound generating device 100b of the third embodiment is substantially another derivative embodiment of the sound generating device of the second embodiment of fig. 9, and the same parts of the sound generating device 100b of the third embodiment are not described again one by one, but the main difference points of the sound generating device 100b of the third embodiment are:

in the third embodiment, the conductive piece 3b and the rear case 2b are of an integral structure, the conductive piece 3b is formed by extending the rear case 2b to the direction far away from the sounding unit 1b, and the conductive piece 3b is located at the outer sides of the front cover 14b and the rear case 2b and is used for grounding, so that a shielding effect is formed, the sounding unit 1b is prevented from being interfered by external electromagnetic waves, and the working reliability is better.

Of course, the specific forming manner of the conductive element is not limited, the conductive element and the front cover are of an integral structure, and the conductive element is formed by extending the front cover to a direction far away from the sounding monomer.

Embodiment IV

Referring to fig. 11 to 12, which are schematic cross-sectional views of a fourth embodiment of the sound generating device of the present invention, a sound generating device 100c of the fourth embodiment is substantially another derivative embodiment of the sound generating device of the first embodiment of fig. 1. The same parts of the two are not described in detail, and the main difference between the two is that the specific arrangement of the conductive devices is different, and the following explains the specific arrangement of the conductive devices in the fourth embodiment:

the sound generating device 100c further includes a conductive component 3c, the conductive component 3c includes two electrical paths, one of the electrical paths is used for connecting the sound generating unit 1c with an external electrical signal and supplying power to the sound generating unit 1c, and the other electrical path is used for grounding the front cover 14c and/or the rear case 2c to form a shield for the sound generating unit 1 c.

In the fourth embodiment, the conductive component 3c is used to form a shielding function together with the front cover 14c and the rear housing 2c, and is also used to supply power to the sound generating unit 1c, so that the conductive component 3c with a simple structure can simultaneously realize dual functions.

For example, the conductive member 3c is of an FPC structure, and the conductive member 3c includes a first arm 31c, a second arm 32c extending from opposite ends of the first arm 31c toward the sound generating unit 1c, a third arm 33c extending from the first arm 31c toward the sound generating unit 1c, and a fourth arm 34c extending from the first arm 31c toward the sound generating unit 1 c.

The first arm 31c is electrically connected to the front cover plate 143c and/or the rear case extension wall 22 c; the second arm 32c is fixed on the frame 11c of the sounding unit 1c and electrically connected with the vibration system 12c to supply power to the vibration system 12 c; the third arm 33c is used for connecting external electrical signals; the fourth arm 34c is used for grounding. That is, the first arm 31c and the fourth arm 34c jointly realize the connection of the front cover 14c and/or the rear case 2c with the ground, and in the present embodiment, one electrical path for shielding the sound generating unit 1c is formed; the first arm 31c, the second arm 32c, and the third arm 33c collectively realize electrical connection of the sound generating unit 1c with an external electrical signal, and realize another electrical path through which the sound generating unit 1c communicates with the external electrical signal.

Through the arrangement of the conductive piece 3c, the electrical signal is provided for the sounding unit 1, and meanwhile, a barrier effect can be formed, so that the design of the sounding device 100c is simpler.

Fifth embodiment

Fig. 13 is a schematic cross-sectional view of a fifth embodiment of the sound generating device according to the present invention. The sound generating device 100d of the fifth embodiment is the sound generating device of the first embodiment, and a side sound generating structure is added to the sound generating device of the first embodiment, the structures of other parts are basically the same, and the same parts are not described again one by one, and the main difference points of the sound generating device 100d of the fifth embodiment are as follows:

the sound generating device 100d generates sound from the front side to form a side sound generating structure.

The sound generating device 100d further comprises a sound guiding shell 5d covering the front cover 14d at a side far away from the rear shell 2d, wherein the sound guiding shell 5d is provided with a sound guiding cavity 50d forming a side sound generating structure; more specifically, the sound guiding shell 5d and the front cover 14d together define a sound guiding cavity 50d, a side sound hole 520d penetrating through the sound guiding shell 5d is disposed at a side opposite to the rear shell extension wall 22d, and the side sound hole 520d communicates the sound guiding cavity 50d with the outside to form a side sound emitting structure.

Further, the sound guiding shell 5d includes a sound guiding shell plate 51d spaced from and facing the front cover plate 143d, and a sound guiding shell extension wall 52d bent and extended from the periphery of the sound guiding shell plate 51d toward the front cover 14d and supported and fixed to the periphery of the front cover plate 143d, and the side sound hole 520d is disposed through the sound guiding shell extension wall 52d, so as to form a side sound emitting structure, which facilitates flexible application with different installation positions.

It should be noted that, in other embodiments, the front cover further includes a sound guide cavity forming the side sound emitting structure, and the sound guide cavity is communicated with the sound emitting cavity through the sound emitting hole of the front cover, that is, the side sound emitting structure is directly formed on the front cover.

Sixth embodiment

Fig. 14 is a schematic cross-sectional view of a sixth embodiment of the sound generation device according to the present invention. The sound-emitting device 100e of the sixth embodiment is the sound-emitting device of the first embodiment, wherein a ventilation spacer is added on the basis of the sound-emitting device, the structures of other parts are basically the same, and the same parts are not described again one by one, and the main difference points of the sound-emitting device 100e of the sixth embodiment are as follows:

the sound-producing device 100e further comprises a ventilation spacer 6e located in the rear sound cavity 102e, wherein the ventilation spacer 6e comprises a spacer body 61e arranged opposite to the rear casing 2e at a distance, a spacer extension part 62e bent and extended from the periphery of the spacer body 61e to the direction of the rear casing 2e, and a spacer fixing part 63e bent and extended from one end of the spacer extension part 62e far away from the spacer body 61 e; the spacer extension part 62e is provided at an interval from the rear case 2e, and the spacer fixing part 63e is fixed to the rear case 2 e; the air-permeable partition 6e and the rear case 2e together define a powder filling space 60 e.

The powder filling space 60e is used for filling sound-absorbing materials, when the sound-absorbing materials are filled in the rear sound cavity 102e, such as sound-absorbing particles, the breathable partition piece 6e effectively prevents the sound-absorbing particles from entering the space between the magnetic circuit system 13e and the vibration system 12e, the risk of sound failure is avoided, and the reliability is improved.

In the sixth embodiment, more specifically, the spacer fixing portion 63e is fixed to the rear casing plate 21e, and the spacer extending portion 62e and the rear casing extending wall 22e of the rear casing 2e are arranged at an interval, which can effectively increase the ventilation smoothness of the rear sound cavity 102e and improve the stability of the low-frequency sound emission performance.

It should be noted that fig. 15 is a schematic structural diagram of a derivative embodiment of the sixth embodiment shown in fig. 14. Referring to the sound generating device 100f shown in fig. 15, one side of the spacer body 61f close to the sound generating unit 1f is recessed in a direction away from the sound generating unit 1f to form an avoiding step 610f, and the avoiding step 610f is disposed opposite to the leakage portion 1310 f. This structural arrangement can make the leakage of the sounding inner cavity 103f of the sounding single body 1f smoother, thereby improving the sounding performance.

Seventh embodiment

Fig. 16 is a schematic perspective view of a seventh embodiment of the sound generating device according to the present invention. The sounding device 100g of the seventh embodiment is the sounding device of the first embodiment, and a positioning plate is added on the basis of the sounding device of the seventh embodiment, the structures of other parts are basically the same, and the same parts are not described again one by one, but the main difference points of the sounding device 100g of the seventh embodiment are as follows:

the sound-producing device 100g further comprises at least two positioning pieces 7g and is respectively connected with the rear shell 2 g.

It should be noted that the specific number of the positioning pieces 7g may be set according to the actual use, for example, in the seventh embodiment, two positioning pieces 7g are included.

Furthermore, one end, far away from the rear shell 2g, of each positioning piece 7g is provided with a positioning hole 70g penetrating through the positioning piece, the positioning piece is used for fixing and positioning the sounding device 100g and the application terminal whole machine, for example, a threaded hole is formed, and a screw can be fixed on the terminal whole machine through the positioning hole 70 g. In order to further improve the fixing stability, the two positioning pieces 7g are connected to two opposite sides or two pairs of corners of the rear shell 2g, and the sound production device 100g and the terminal complete machine are symmetrically arranged to have better positioning and fixing effects. In the present embodiment, the positioning piece 7g is fixed to the rear case 2g by welding, that is, the positioning piece 7g and the rear case 2g are a split structure of two components.

Please refer to fig. 17, which is a schematic structural diagram of a seventh derivative embodiment of the embodiment shown in fig. 16. The seventh embodiment of the present invention is different from the seventh embodiment of fig. 16 in that in the sound generating device 100h of the present embodiment, the positioning piece 8h is formed by extending the rear housing 2h outward, that is, the positioning piece 8h and the rear housing 2h are integrally formed, 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 sounding device comprises a sounding monomer, wherein the sounding monomer comprises a vibrating diaphragm for vibrating and sounding and a front cover which is fixedly covered on one side of the sounding monomer close to the vibrating diaphragm, and the front cover and the vibrating diaphragm jointly enclose a sounding cavity;

the front cover comprises a front cover plate and a sound outlet hole, wherein part of the front cover plate is attached to and fixed on the sound generating single body, the sound outlet hole penetrates through the front cover plate, and the sound outlet hole is used for communicating the sound outlet cavity with the outside;

2. The sounding device according to claim 1, wherein the front cover further comprises a sound-emitting plate spaced apart from and opposite to the diaphragm, and a connecting wall extending from the sound-emitting plate to the diaphragm, the front cover plate is formed by extending the connecting wall in a bending manner, and the sound-emitting hole is formed through the sound-emitting plate.

3. The sounding device according to claim 1, wherein the front cover plate is pressed against the diaphragm.

4. The sounding device according to claim 2, wherein a side of the diaphragm close to the front cover is protruded to form an annular sealing boss, and the front cover plate is pressed on the sealing boss to form a seal.

5. The sounder device according to claim 1, wherein the front cover and the rear housing are both made of a metal material.

6. The sounder device according to claim 5, wherein the front cover or the rear housing is at least partially configured for grounding.

7. The sounder device according to claim 5, further comprising a conductive member, one end of which is connected to the front cover and/or the rear housing, and the other end of which is connected to ground.

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

9. 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 ground the front cover and/or the rear housing.

10. The sound production device of claim 1, further comprising at least two positioning pieces, wherein the at least two positioning pieces are connected to two opposite sides or two pairs of corners of the rear housing, and one end of each positioning piece, which is far away from the rear housing, is provided with a positioning hole penetrating through the positioning piece.

11. The sounder device according to claim 10, wherein the splines are formed by extending outwardly from the rear housing.

12. The device of claim 1, further comprising a sound guide housing covering a side of the front cover remote from the rear housing, the sound guide housing having a sound guide cavity forming a side sound emitting structure, the sound guide cavity communicating with the sound emitting cavity through the sound emitting aperture.

13. The sound production device of claim 1, wherein the front cover further comprises a sound guide cavity forming a side sound emitting structure, the sound guide cavity communicating with the sound outlet cavity through the sound outlet aperture.

14. 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 jointly enclose a powder filling space.

15. The sound production device according to claim 14, 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 disposed opposite to the leakage portion.

16. The sounder device according to claim 1, wherein the front cover and the rear housing are each made from 0.15mm thick steel sheet.

17. The sound production device according to claim 1, wherein the sound production unit further comprises a basin frame, the diaphragm is attached and fixed to the basin frame, the front cover is fixed to one side of the basin frame close to the diaphragm, and the extension wall of the rear shell surrounds the periphery of the basin frame; the thickness of the extending wall of the rear shell is smaller than that of the basin rack; and a space is arranged between the rear shell extension wall and at least one side of the basin frame, and the space is less than 3 times of the thickness of the rear shell extension wall.

18. The sound production device of claim 17, wherein the area ratio of the orthographic projection of the sound production unit to the rear housing along the vibration direction of the diaphragm to the projection plane of the rear housing is at least 4/5.

19. The sounding device according to claim 17, wherein the front cover plate comprises a first section fixed on the frame and a second section extending from an outer periphery of the first section in a direction perpendicular to the vibration direction of the diaphragm and protruding away from the frame, and a distance between an outer end surface of the second section and the frame is less than or equal to 0.20 mm.