CN212628372U

CN212628372U - Sound production device

Info

Publication number: CN212628372U
Application number: CN202020964673.XU
Authority: CN
Inventors: 曹成铭; 吴树文; 吴立峰; 沈凯华
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: WO2021237835A1

Abstract

The utility model provides a sounding device, which comprises a sounding monomer with a vibrating diaphragm and a shell, wherein the shell comprises a base and a rear shell which are respectively covered on the sounding monomer; the base comprises a sound outlet plate spaced from the vibrating diaphragm, a connecting wall extended from the sound outlet plate, a base plate extended from the connecting wall and fixed on the sound generating monomer, a base extending wall extended from the base plate and a sound outlet hole penetrating through the base plate, wherein the base extending wall surrounds the periphery of the sound generating monomer; the base extension wall is attached to the sounding monomer, or at least one side of the base extension wall and the sounding monomer is provided with an interval, and the interval is less than 3 times of the thickness of the base extension wall; the base and the vibrating diaphragm jointly enclose a sound outlet cavity, and the sound outlet plate is provided with a sound outlet hole for communicating the sound outlet cavity with the outside; the back cap establishes to be fixed in the base and extends the wall and form sealedly, and casing and sound production monomer enclose into the back sound chamber, and the casing is equipped with the leakage hole that communicates back sound chamber and external world. Compared with the prior art, the utility model discloses sound production 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 housing and a sound generating unit fixed to the housing, wherein the sound generating unit includes a vibrating diaphragm for vibrating sound; the shell comprises a base and a rear shell which are respectively covered on two opposite sides of the sounding monomer;

the base comprises a sound outlet plate arranged opposite to the vibrating diaphragm at an interval, a connecting wall bent and extended from the sound outlet plate to the vibrating diaphragm, a base plate bent and extended from the connecting wall to the direction far away from the sound outlet plate and a base extending wall bent and extended from the base plate to the rear shell along the periphery of the sound generating monomer, the base plate is covered and fixed on one side, close to the vibrating diaphragm, of the sound generating monomer, and the base extending wall surrounds the periphery of the sound generating monomer; the sound outlet plate, the connecting wall, the base plate and the vibrating diaphragm jointly enclose a sound outlet cavity, the sound outlet plate is provided with a sound outlet hole penetrating through the sound outlet plate, and the sound outlet hole is used for communicating the sound outlet cavity with the outside;

the base extension wall is attached to the sound production single body, or at least one side of the base extension wall and the sound production single body is provided with a space, and the space is less than 3 times of the thickness of the base extension wall;

the back cap is established and is fixed in the base extends the wall and keeps away from vibrating diaphragm one side and with the base extends the wall and forms sealedly, the casing with the sound production monomer encloses into the back vocal chamber jointly, the sound production monomer be equipped with the portion of revealing of back vocal chamber intercommunication, the casing is equipped with the leakage hole that runs through it, the leakage hole will back vocal chamber and external intercommunication.

Preferably, the base plate is pressed on the diaphragm.

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

Preferably, the backshell include with sound production monomer spaced backshell board and by the backshell board to the backshell extension wall that the base direction is buckled and is extended, the leakage hole runs through the backshell board sets up, backshell extension wall fixed connection in the base extension wall and with the base extension wall forms sealedly.

Preferably, the housing is made of a metal material.

Preferably, the housing 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 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 grounding the housing.

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 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 sound production device further comprises a sound guide shell arranged on the base and 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 base 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 housing is made of a steel sheet with a thickness of 0.15 mm.

Preferably, the sounding unit further comprises a basin stand, the base and the rear shell are respectively covered and fixed on two opposite sides of the basin stand, and the extending wall of the base surrounds the periphery of the basin stand; the thickness of the base extension wall is smaller than that of the basin stand; the base extension wall is attached to the basin frame, or the base extension wall and at least one side of the basin frame are provided with a gap, and the gap is smaller than 3 times of the thickness of the base 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 interval is less than or equal to 1/3 of the width of the fixing surface of the diaphragm.

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

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

Compared with the prior art, in the sounding device of the utility model, the shell comprises a base and a back shell respectively covering opposite sides of the sounding monomer, the base extension wall of the base is attached to the sounding monomer, or the base extension wall of the base and at least one side of the sounding monomer are provided with a space, the space is less than 3 times the thickness of the base extension wall, the shell and the sounding monomer are enclosed into a back sound cavity, the sounding monomer is provided with a leakage part communicated with the back sound cavity, the shell is provided with a leakage hole to communicate the back sound cavity with the outside, the structure forms a closed back sound cavity structure, the arrangement is simple in structure, the horizontal size of the whole body along the vibration direction perpendicular to the vibrating diaphragm is small in increase, the acoustic effect of the sounding device is better, meanwhile, the closed back sound cavity structure enables the shell to be used for vibration absorption, and the shell vibration phenomenon is avoided after the sounding device is applied to a mobile terminal, the user experience effect is better; in addition, a sound outlet cavity is formed by enclosing the sound outlet plate, the connecting wall, the base plate and the vibrating diaphragm of the base together, so that the vibrating diaphragm can make sound in the sound outlet cavity in an internal vibration mode, namely the vibrating diaphragm can make sound in the internal vibration mode of an independent cavity, the adverse effect of the external environment on the vibration of the vibrating diaphragm is avoided as far as possible, and the reliability of the sound vibration 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 a first embodiment of the sound device according to the present invention;

fig. 2 is an exploded schematic view of a part of a three-dimensional structure of a first embodiment of the sound generating device of the present invention;

fig. 3 is an exploded schematic view of another part of the first embodiment of the sound device according to the present invention;

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

fig. 5 is a schematic cross-sectional view of a diaphragm provided with a sealing boss according to a first embodiment of the present invention;

FIG. 6 is a partial enlarged view of the portion indicated by B in FIG. 5;

FIG. 7 is a schematic perspective view of the diaphragm shown in FIG. 5;

fig. 8 is a schematic cross-sectional view of a second embodiment of the sound device according to the present invention;

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

fig. 10 is a schematic perspective view of a fourth embodiment of the sound generation device according to the present invention;

fig. 11 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. 12 is a schematic cross-sectional view of a fifth embodiment of the sound generation device of the present invention;

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

FIG. 14 is a schematic structural view of a derivative embodiment of the sixth embodiment shown in FIG. 13;

fig. 15 is a schematic perspective view of a seventh embodiment of the sound generating device according to the present invention;

fig. 16 is a schematic structural view of a derivative embodiment of the seventh embodiment shown in fig. 15.

[ 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. 1-4, the present invention provides a sound generating device 100, which includes a sound generating unit 1 and a housing 200 for fixedly supporting the sound generating unit 1.

The sounding single body 1 comprises a basin frame 11, a vibration system 12 and a magnetic circuit system 13, and the sounding single body 1 is provided with a leakage part 1310; the vibration system 12 and the magnetic circuit system 13 are respectively supported and fixed on the basin frame 11 and jointly enclose a sounding cavity 103, and the magnetic circuit system 13 drives the vibration system 12 to vibrate and sound.

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

More specifically, the diaphragm 121 includes a vibrating portion 1211 connected to the voice coil 122, a corrugated rim portion 1212 extending from 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 casing 200 includes a base 2 and a rear case 3, and the base 2 and the rear case 3 are respectively covered on opposite sides of the frame 11 of the sound generating unit 1 along the vibration direction of the diaphragm 121.

The base 2 includes a sound-emitting plate 21 disposed opposite to the diaphragm 121 at an interval, a connecting wall 22 bent and extended from the sound-emitting plate 21 to the diaphragm 121 along the vibration direction, a base plate 23 bent and extended from the connecting wall 22 along the vertical vibration direction to the direction away from the sound-emitting plate 21, and a base extending wall 24 bent and extended from the base plate 23 along the peripheral side of the frame 11 toward the rear case 3.

The base plate 23 is covered and fixed on one side, close to the vibrating diaphragm 121, of the basin frame 11 of the sound generating single body 1, and the base extension wall 24 is arranged around the sound generating single body 1 and at least partially arranged at intervals with the sound generating single body 1; the sound outlet plate 21, the connecting wall 22, the base plate 23 and the vibrating diaphragm 121 jointly enclose a sound outlet cavity 101, a sound outlet hole 20 penetrating through the sound outlet plate 21 is formed in the vibration direction of the sound outlet plate 21, the vibrating diaphragm 121 is arranged right opposite to the sound outlet hole 20, and the sound outlet hole 20 communicates the sound outlet cavity 101 with the outside to form a front sound production structure.

It should be noted that the number and the position of the sound outlet holes 20 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 20 include four sound outlet holes 20, and the four sound outlet holes 20 are arranged in an array.

Through the setting of the sound-emitting cavity 101, the vibrating diaphragm 121 produces sound in the internal vibration of the sound-emitting cavity 101, namely, the vibrating diaphragm 121 produces sound in the internal vibration of an independent cavity, so that the external environment is prevented from producing adverse effects on the vibration of the vibrating diaphragm 121 as much as possible, the reliability of the sound production in vibration is ensured, and the high-frequency acoustic performance of the sound-emitting device 100 is further improved.

The back shell 3 is covered and fixed on one side of the base extension wall 24 far away from the diaphragm 121 and forms a seal with the base extension wall 24.

Specifically, the back shell 3 includes a back shell plate 31 located on a side of the frame 11 away from the diaphragm 121 and spaced apart from the frame 11, and a back shell extension wall 32 extending from the back shell plate 31 to the base extension wall 24.

The back shell extension wall 32 is fixedly connected to the base extension wall 24 and forms a seal with the base extension wall 24, the extension direction of the back shell extension wall 32 is parallel to the vibration direction of the diaphragm 121, and the extension direction of the base extension wall 24 is parallel to the vibration direction of the diaphragm 121. More specifically, the sealing manner between the base extension wall 24 and the rear housing extension wall 32 is not limited, and may be specifically selected according to the actual use requirement, for example, in the first embodiment, the base extension wall 24 and the rear housing extension wall 32 may be fixed by welding or gluing to form a seal. In this embodiment, the rear housing extension wall 32 and the base extension wall 24 are disposed to face each other.

The casing 200 and the sounding unit 1 together enclose a rear sound cavity 102, the leakage portion 1310 connects the sounding inner cavity 103 with the rear sound cavity 102 to improve the low-frequency acoustic performance, the casing 200 is provided with a leakage hole 33 penetrating through the casing 200, more specifically, the leakage hole 33 penetrates through the rear shell plate 31 along the vibration direction of the diaphragm 121, and the leakage hole 33 connects 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 hole is not limited, and in other embodiments, it is possible to arrange the leakage hole through the base, or through both the base and the rear housing.

Therefore, the utility model discloses an above-mentioned sound production device 100 has then formed confined back sound cavity structure, and its simple structure has improved sound production device 100's acoustic performance on the one hand, especially low frequency acoustic performance, and on the other hand because of the existence of back sound cavity 102 structure, base 2 and backshell 3 form and inhale the vibration effect for sound production device 100 can not make mobile terminal isoelectron products produce the shell phenomenon of shaking after applying to mobile terminal isoelectron products, has effectively increased customer's user experience effect. Preferably, in order to improve the reliability of fixing the diaphragm 121, the base plate 23 is pressed against the fixing portion 1213 of the diaphragm 121.

In the first embodiment, the casing 200 may be made of one of metal, ceramic and glass, for example, the casing 200 is made of metal material, the metal material includes but is not limited to steel, iron, copper, etc., the casing 200 forms a metal cover, and the metal cover is at least partially grounded, so as to form a shielding effect, so as to reduce the influence of an external electromagnetic field on the vibration and sound emission of the sound emission unit 1, effectively improve the reliability of the vibration and sound emission of the sound emission unit 1, and effectively improve the sound emission performance.

In this embodiment, the thickness of the base 2 and the thickness of the rear housing 3 are both smaller than the thickness of the basin frame 11, specifically, the thickness of the base extension wall 24 and the thickness of the rear housing extension wall 32 are smaller than the thickness of the basin frame 11, and this structural design makes the base 2 and the rear housing 3 satisfy the structural strength, and at the same time, the occupied volume in the vibration direction perpendicular to the vibrating diaphragm 121 is smaller, and the application in the terminal with a small transverse installation space is more facilitated.

Further, the base extension wall 24 is spaced from at least one side of the frame 11 by a distance less than 3 times the thickness of the base extension wall 24. The gap reserves a certain assembly gap for the assembly of the sound generating monomer 1, so that the sound generating monomer 1 is assembled into the shell 200 more quickly, the assembly efficiency is improved, and meanwhile, the transverse space occupied by the sound generating device 100 in the vibration direction vertical to the vibrating diaphragm 121 is not occupied more; more specifically, the interval between the base extension wall 24 and the frame 11 is less than or equal to 1/3 the width of the fixing surface of the diaphragm 121, i.e., the width of the interval is less than or equal to the width of the fixing portion 1213 of the diaphragm 121. Of course, in other embodiments, it is also possible to attach the bottom wall extension wall to the outer peripheral side of the frame of the sounding unit.

Preferably, the area ratio of the orthographic projection of the sound generating unit 1 to the rear case 3 in the vibration direction of the diaphragm 121 to the projection plane of the rear case 3 is at least 4/5. The structure can ensure that the size of the sounding device 100 in the vibration direction vertical to the vibrating diaphragm 121 is as small as possible, so that the sounding device is more convenient to mount on a product with a 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 should be noted that the shell 200 has a uniform wall thickness structure, for example, in the first embodiment, the shell 200 is made of a steel sheet with a thickness of 0.15mm, that is, the base 2 and the rear shell 3 are made of a steel sheet with a thickness of 0.15mm through a stretch forming process, so that the wall thickness of the base 2 and the wall thickness of the rear shell 3 are both 0.15 mm.

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 4 and a soldering lug 5.

The soldering lug 5 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 5, one end of the conductive piece 4 extends to the basin frame 11 through the space between the base 2 and the rear shell 3 and is electrically connected with the soldering lug 5, namely, the end is electrically connected with the vibrating system 12 through the soldering lug 5, the other end of the conductive piece 4 is also used for connecting an external electric signal, namely supplying power to the voice coil 122 of the vibrating system 12, namely, the conductive piece 4 transmits the external electric signal to the voice coil 122 through the soldering lug 5, and the voice coil 122 drives the vibrating diaphragm 121 to vibrate and sound under the control; more specifically, in the first embodiment, the rear housing extension wall 32 is provided with an opening 320 penetrating therethrough in the direction perpendicular to the vibration direction of the diaphragm 121, and the conductive member 4 extends into the rear acoustic cavity 102 through the opening 320 and is electrically connected to the bonding pad 5.

Further, the conductive member 4 includes a first arm 41 sandwiched between the base extension wall 24 and the rear housing extension wall 32, a second arm 42 extending from two opposite ends of the first arm 41 toward the sound generating unit 1, and a third arm 43 extending from the first arm 41 toward a direction away from the sound generating unit 1; the first arm 41 is arranged through the opening 320, the second arm 42 is fixed on the frame 11 of the sound generating unit 1 and is electrically connected with the vibration system 12 through the soldering lug 5, and the third arm 43 is arranged outside the rear sound cavity 102 and is used for connecting an external electric signal.

In the above structure, through the opening 320, the conductive member 4 and the soldering lug 5 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. Of course, the position of the opening is not limited, and in other embodiments, the opening may extend only through the base extension wall, or both the base extension wall and the rear housing extension wall.

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 base plate 23 is poor. Therefore, referring to fig. 5-7, as a preferred embodiment of the present embodiment, by forming the annular sealing boss 1214 protruding from the side of the diaphragm 121 close to the base plate 23, during assembly, the base plate 23 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 base plate 23.

Second embodiment

Fig. 8 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 base 2a and the rear housing 3a are made of metal material, such as steel, iron, copper, etc., and for example, the base 2a and the rear housing 3a are made of steel sheet with a thickness of 0.15mm by drawing.

Specifically, the sounding device 100a further includes a conductive component 4a, one end of the conductive component 4a is connected to the housing 200a, and the other end of the conductive component 4a 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. 9, which is a schematic cross-sectional view of a third embodiment of the sound device of the present invention, the sound device 100b of the third embodiment is substantially another derivative embodiment of the sound device of the second embodiment of fig. 8, and the same parts of the sound device 100b of the third embodiment are not repeated one by one, but the main difference points of the sound device 100b of the third embodiment are:

the conductive member 4b is integrated with the housing 200b, and the conductive member 4b is formed by extending the housing 200 b; specifically, in this embodiment three, electric 4b is formed by extending rear shell 3b to the direction of keeping away from sound production monomer 1b, and this electrically conductive piece 4b is located the outside of base 2b and rear shell 3b, and it is used for ground connection to form shielding effect, make sound production monomer 1b avoid receiving external electromagnetic interference, operational reliability is better.

Of course, the specific forming manner of the conductive member is not limited, and it is also possible that the conductive member is formed by extending the base in a direction away from the sounding unit.

Embodiment IV

Referring to fig. 10 to 11, 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. 3. 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 sounding device 100c further includes a conductive component 4c, where the conductive component 4c includes two electrical paths, one of the electrical paths is used to connect the sounding unit 1c to an external electrical signal and supply power to the sounding unit 1c, and the other electrical path is used to ground the casing 200c to form a shield for the sounding unit 1 c.

In the fourth embodiment, the conductive component 4c is used to form a shielding function together with the housing 200c, and also used to supply power to the sounding unit 1c, so that the conductive component 4c with a simple structure can simultaneously achieve dual functions.

For example, the conductive member 4c is an FPC structure, and the conductive member 4c includes a first arm 41c sandwiched between the base extension wall 24c and the rear housing extension wall 32c, a second arm 42c extending from opposite ends of the first arm 41c toward the sound generating unit 1c, a third arm 43c extending from the first arm 41c toward a direction away from the sound generating unit 1c, and a fourth arm 44c extending from the first arm 41c toward a direction away from the sound generating unit 1 c.

The first arm 41c is electrically connected to the housing 200 c; the second arm 42c 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 43c is used for connecting external electrical signals; the fourth arm 44c is used for grounding. That is, the first arm 41c and the fourth arm 44c jointly realize the connection of the housing 200c with the ground, and in the present embodiment, one electrical path for shielding the sound generating unit 1c is formed; the first arm 41c, the second arm 42c, and the third arm 43c 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 member 4c, the electrical signal is provided for the sounding unit 1c, and simultaneously, a barrier effect can be formed, so that the design of the sounding device 100c is simpler.

Fifth embodiment

Fig. 12 is a schematic cross-sectional view of a fifth embodiment of the sound production 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 6d which is covered on one side of the base 2d far away from the rear shell 3d, and the sound guiding shell 6d is provided with a sound guiding cavity 60d forming a side sound generating structure; more specifically, the sound guiding shell 6d and the base 2d together enclose a sound guiding cavity 60d, one side of the sound guiding shell 6d opposite to the base extension wall 24d is provided with a side sound hole 620d penetrating through the sound guiding shell, and the side sound hole 620d communicates the sound guiding cavity 60d with the outside to form a side sound emitting structure.

Further, the sound guiding shell 6d includes a sound guiding shell plate 61d opposite to the base plate 23d at a distance, and a sound guiding shell extending wall 62d bending and extending from the periphery of the sound guiding shell plate 61d to the base 2d and supporting and fixing on the periphery of the base plate 23d, and the side sound hole 620d is disposed through the sound guiding shell extending wall 62d, so as to form a side sound structure, which is convenient for flexible application with different installation positions.

It should be noted that, in other embodiments, the base further includes a sound guide cavity forming the side sound production structure, and the sound guide cavity is communicated with the sound outlet cavity through the sound outlet hole to form the side sound production structure, that is, the side sound production structure is directly formed on the base.

Sixth embodiment

Fig. 13 is a schematic cross-sectional view of a sixth embodiment of the sound generating 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 breathable partition 7e positioned in the rear sound cavity 102e, wherein the breathable partition 7e comprises a partition body 71e arranged opposite to the rear shell 3e at a distance, a partition extension part 72e bent and extended from the periphery of the partition body 71e to the direction of the rear shell 3e, and a partition fixing part 73e bent and extended from one end, far away from the partition body 71e, of the partition extension part 72 e; the spacer extension portion 72e is provided at an interval from the case 200e, and the spacer fixing portion 73e is fixed to the rear case 3 e; the air-permeable partition 7e and the rear case 3e together enclose a powder filling space 70 e.

The powder filling space 70e is used for filling sound-absorbing materials, when the sound-absorbing materials, such as sound-absorbing particles, are filled in the rear sound cavity 102e, the breathable partition 7e 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 73e is fixed to the rear housing plate 31e, and the spacer extension portion 72e and the rear housing extension wall 32e of the rear housing 3e are provided at an interval, which can effectively increase the ventilation smoothness of the rear acoustic cavity 102e and improve the stability of the low-frequency sound emission performance.

It should be noted that fig. 14 is a schematic structural diagram of a derivative embodiment of the sixth embodiment shown in fig. 13. Referring to the sound generating device 100f shown in fig. 14, one side of the spacer body 71f close to the sound generating unit 1f is recessed in a direction away from the sound generating unit 1f to form an avoiding step 710f, and the avoiding step 710f 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. 15 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, and the main difference points of the sounding device 100e of the seventh embodiment are as follows:

the sound producing device 100g further includes at least two positioning pieces 8g and are respectively connected to the housing 200 g.

It should be noted that the specific number of the positioning pieces 8g may be set according to the actual use, for example, in the seventh embodiment, two positioning pieces 8g are included.

Furthermore, one end, far away from the base 2g, of each positioning piece 8g is provided with a positioning hole 81g penetrating through the positioning piece, and 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 81 g. In order to further improve the fixing stability, the two positioning pieces 8g are connected to two opposite sides or two opposite corners of the base 2g of the shell 200g, and the sound production device 100g and the terminal complete machine are positioned and fixed more effectively due to the symmetrical arrangement. In the present embodiment, the positioning piece 8g is fixed to the base 2g by welding, that is, the positioning piece 8g and the base 2g are a split structure of two components. Of course, the two positioning pieces are respectively connected to the rear shell and are arranged at two opposite sides or two opposite corners of the rear shell at intervals, and the positioning holes are formed in one ends of the positioning pieces far away from the rear shell.

Please refer to fig. 16, which is a schematic structural diagram of a derivative embodiment of the seventh embodiment shown in fig. 15. The seventh embodiment of the present invention is different from the seventh embodiment of fig. 15 in that in the sound generating device 100h of the present embodiment, the positioning piece 8h is formed by extending the housing 200h outward, i.e. the positioning piece 8h and the housing 200h 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, in the sounding device of the utility model, the shell comprises a base and a back shell which are respectively covered on two opposite sides of the sounding monomer, the base extension wall of the base is attached to the sounding monomer, or the base extension wall of the base and at least one side of the sounding monomer are provided with a space, the space is less than 3 times of the thickness of the shell, the shell and the sounding monomer are enclosed into a back sound cavity, the sounding monomer is provided with a leakage part communicated with the back sound cavity, the shell is provided with a leakage hole to communicate the back sound cavity with the outside, the structure forms a closed back sound cavity structure, the arrangement is simple, the horizontal size of the whole body along the vibration direction vertical to the vibrating diaphragm is slightly increased, the acoustic effect of the sounding device is better, meanwhile, the closed back sound cavity structure enables the shell to be used for vibration absorption, thereby the sounding device avoids the generation of shell vibration phenomenon after being applied to a mobile terminal, the user experience effect is better; in addition, a sound outlet cavity is formed by enclosing the sound outlet plate, the connecting wall, the base plate and the vibrating diaphragm of the base together, so that the vibrating diaphragm can make sound in the sound outlet cavity in an internal vibration mode, namely the vibrating diaphragm can make sound in the internal vibration mode of an independent cavity, the adverse effect of the external environment on the vibration of the vibrating diaphragm is avoided as far as possible, and the reliability of the sound vibration is ensured.

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 shell and a sounding monomer fixed on the shell, wherein the sounding monomer comprises a vibrating diaphragm for vibrating and sounding;

2. The sounding device according to claim 1, wherein the base plate is pressed against the diaphragm.

3. The sounding device according to claim 2, wherein a side of the diaphragm adjacent to the base plate is protruded to form an annular sealing boss, and the base plate is pressed against the sealing boss to form a seal.

4. The sound production device as claimed in any one of claims 1-3, wherein the rear housing includes a rear housing plate spaced from the sound producing unit and a rear housing extension wall extending from the rear housing plate and bent toward the base, the leakage hole is disposed through the rear housing plate, and the rear housing extension wall is fixedly connected to the base extension wall and forms a seal with the base extension wall.

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

6. The sounder device according to claim 5, wherein the housing is at least partially adapted for grounding.

7. The sounder device according to claim 5, further comprising a conductive member having one end connected to the housing and another end for grounding.

8. The sounder device according to claim 7, wherein the conductive member is formed by extending the housing.

9. The sounder device according to claim 5, further comprising a conductive member comprising two electrical paths, one of the electrical paths for connecting the sounding body to an external electrical signal, and the other electrical path for grounding the 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 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.

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

12. The device of claim 1, further comprising a sound guide housing covering a side of the base 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 base further comprises a sound conduction cavity forming a side sound emitting structure, the sound conduction cavity communicating with the sound outlet cavity through the sound outlet aperture.

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

15. The sound production device according to claim 1, wherein the sound production unit further comprises a basin frame, the base and the rear shell are respectively covered and fixed on two opposite sides of the basin frame, and the base extension wall surrounds the periphery of the basin frame; the thickness of the base extension wall is smaller than that of the basin stand; the base extension wall is attached to the basin frame, or the base extension wall and at least one side of the basin frame are provided with a gap, and the gap is smaller than 3 times of the thickness of the base extension wall.

16. The sound production device of claim 1, 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.

17. The sounder device according to claim 1, wherein the spacing is less than or equal to 1/3 of the width of the stationary face of the diaphragm.

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

19. The sound production device according to claim 18, 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.