CN212628368U

CN212628368U - Sound production device

Info

Publication number: CN212628368U
Application number: CN202020964061.0U
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: WO2021237834A1

Abstract

The utility model provides a sounding device, which comprises a sounding monomer; the sounding single body is provided with a positioning boss; the shell also comprises a base and a rear shell which are fixedly supported on two opposite sides of the positioning boss respectively; the base comprises a base plate which is covered and fixed on the sounding single body and a base extension wall which is bent and extended from the base plate to the rear shell along the peripheral side of the sounding single body, and the base extension wall is fixed on the positioning boss; the backshell includes the backshell board with sound production monomer spaced and by the backshell extension wall that the backshell board extends to base is buckled along sound production monomer week, and the backshell extension wall is fixed in the location boss, and backshell and sound production monomer enclose into the back sound chamber jointly, and sound production monomer is equipped with the portion of revealing with back sound chamber intercommunication, and the backshell is equipped with the leakage hole that runs through it, leaks the hole and communicates back sound chamber and external world. 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. In addition, the sounding unit in the existing sounding device is directly accommodated and fixed in the shell, so that the sounding unit is not limited in the height direction, and the sounding unit is easily separated from the shell under the condition of falling, so that the overall reliability of the sounding device is affected.

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

[ Utility model ] content

An object of the utility model is to provide a sound production device that simple structure, acoustic performance are good, user experience is effectual.

In order to achieve the above object, the present invention provides a sound generating device, which comprises a sound generating unit; the sounding single body is provided with a positioning boss; the sounding device also comprises a base and a rear shell which are fixedly supported on two opposite sides of the positioning boss respectively;

the base comprises a base plate and a base extension wall, the base plate is fixedly covered on the sound generating single body, the base extension wall is bent and extended from the base plate to the rear shell along the periphery of the sound generating single body, and the base extension wall is fixed on the positioning boss;

the backshell include with sound production monomer spaced backshell board and by the backshell board is followed sound production monomer week side to the backshell extension wall that the base was buckled and is extended, the backshell extension wall is fixed in the location boss, the backshell reaches sound production monomer encloses into back sound cavity jointly, sound production monomer be equipped with the portion of revealing of back sound cavity intercommunication, the backshell is equipped with the leakage hole that runs through it, the leakage hole will back sound cavity and external intercommunication.

Preferably, the positioning bosses comprise a plurality of positioning bosses which are arranged at intervals, and the base extension wall and the rear shell extension wall are respectively and fixedly supported on the plurality of positioning bosses.

Preferably, the rear shell extension wall and the base extension wall are both attached and fixed with the sounding monomer so that the rear shell extension wall and the base extension wall are both sealed with the sounding monomer.

Preferably, the base extends the wall with the backshell extends the wall all with sound production monomer interval sets up, just the base extend the wall with the backshell extends the wall interval and is adjacent form between the location boss and hold gluey space, hold gluey space in the filler so that the base extends the wall with form sealedly between the backshell extension wall.

Preferably, the positioning boss is annular, and the base extension wall and the rear shell extension wall are respectively and fixedly supported on two opposite sides of the positioning boss and form a seal with the positioning boss.

Preferably, the base extension wall and the rear shell extension wall are fixed with the positioning boss in a welding or gluing fixing mode to form sealing.

Preferably, the sounding single body comprises a basin frame, and the positioning boss is formed by protruding and extending the basin frame in the direction far away from the sounding single body; the base plate is fixed in the basin frame, the base extends the wall with the backshell extends the wall and encircles basin frame week side sets up.

Preferably, the sound production monomer is fixed in including the support the vibration system of basin frame, the location boss is along the perpendicular to vibration system's vibration direction is to keeping away from the free direction protrusion of sound production extends, the base extend the wall with the backshell extends the wall and is fixed in respectively the location boss is followed the relative both sides of vibration system's vibration direction.

Preferably, the sounding unit comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system is respectively supported and fixed on the basin frame, the magnetic circuit system drives the vibration system to vibrate and sound, and the positioning boss is formed by protruding and extending the magnetic circuit system in the direction far away from the sounding unit; the base plate is fixed in the basin frame, the base extends the wall with the backshell extends the wall and encircles basin frame week side sets up.

Preferably, the magnetic circuit system comprises a magnetic yoke fixed on the basin stand and a magnetic steel unit fixedly supported on the magnetic yoke, and the positioning boss is formed by protruding and extending the periphery of the magnetic yoke in the direction away from the sounding single body.

Preferably, magnetic circuit is including being fixed in the yoke of basin frame, fixed stay in the magnet steel unit of yoke and being fixed in basin frame and lid are located the magnet steel unit is kept away from the punch holder of yoke one end, the location boss by the punch holder is to keeping away from the free direction protrusion of sound production extends and forms.

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

Preferably, the base 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 base or the rear shell, and the other end of the conductive member is grounded.

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

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 base or the rear 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 pairs of corners of one of the base and the rear shell, and one end, far away from the base or the rear shell, of each positioning piece is provided with a positioning hole penetrating through the positioning piece.

Preferably, the positioning piece is formed by extending the base or the rear shell away from the sounding monomer.

Preferably, the sound production device is still located including the lid the base is kept away from the shell of leading of backshell one side, the shell of leading has the chamber of leading that forms side sound production structure, the sound production monomer includes the basin frame, is fixed in the basin frame is close to the vibrating diaphragm of base one side and is fixed in the vibrating diaphragm is kept away from the protecgulum of backshell one side, the protecgulum with the vibrating diaphragm encloses to close and forms the chamber of leading out the sound, the protecgulum is equipped with the hole of leading out the sound that runs through above that, the chamber of leading the sound pass through the hole of leading out the sound with the chamber of leading out the sound intercommunication.

Preferably, the sound guiding shell comprises a sound guiding shell plate opposite to the base plate at intervals, and a sound guiding shell extending wall which is bent and extended from the periphery of the sound guiding shell plate to the base and is supported and fixed on the periphery of the base plate, and the sound guiding shell extending wall is provided with a side sound hole penetrating through the sound guiding shell extending wall.

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 isolating piece extending part and the rear shell extending wall are arranged at intervals, and the isolating piece fixing part is fixed on the rear shell; the breathable isolating piece and the rear shell jointly enclose a powder filling space.

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

Preferably, the base 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 base and the rear shell are respectively covered and fixed on two opposite sides 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 sounding monomer comprises a vibrating diaphragm fixed on the basin frame and used for vibrating and sounding, and the area ratio of the sounding monomer to the orthographic projection of the rear shell and the projection plane of the rear shell along the vibration direction of the vibrating diaphragm is at least 4/5.

Compared with the prior art, the utility model discloses an in the sounder, cover respectively through design base and backshell and locate the relative both sides of sound production monomer, and make backshell and sound production monomer enclose into the back sound chamber jointly, the backshell sets up the leakage hole and communicates the back sound chamber with the external world, above-mentioned structure has formed inclosed back sound chamber structure, not only simple structure, the whole horizontal dimension along perpendicular to the direction of vibration of sounder increases for a short time, and make the acoustical effect of sounder more excellent, and inclosed back sound chamber structure makes base 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, the base and the rear shell are respectively and fixedly supported on the two opposite sides of the positioning boss of the sounding monomer, so that the limit of the sounding monomer in the vibration direction is realized, the fixing reliability between the base and the rear shell as well as the sounding monomer is improved, and the falling of the sounding monomer under the condition that the sounding device falls is effectively avoided.

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

FIG. 4 is an exploded view of a three-dimensional structure of an embodiment of the sound device of the present invention;

fig. 5 is a schematic view of the three-dimensional structure of the positioning boss of the sound device of the present invention disposed on the magnetic yoke;

FIG. 6 is a sectional view taken along line B-B of FIG. 5;

FIG. 7 is a schematic view of a derivative embodiment of the positioning boss of the sound device of the present invention disposed on the magnetic circuit system;

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 cross-sectional view of a sixth derivative embodiment of a sound device in accordance with the present invention;

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 perspective view of a seventh derivative embodiment of the sound device of the present invention.

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

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, the magnetic circuit system 13 drives the vibration system 12 to vibrate and sound, and the sounding cavity 103 leaks outwards through the leakage part 1310.

In the present 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 magnetic yoke 131 fixed on one side of the basin frame 11 away from the diaphragm 121, a magnetic steel unit 132 fixedly supported on the magnetic yoke 131 and forming a magnetic gap 130, and an upper clamp plate 133 fixed on the basin frame 11 and covering the magnetic steel unit 132 and away from one end of the magnetic yoke 131, the voice coil 122 is inserted in the magnetic gap 130 and used for driving the diaphragm 121 to vibrate and sound, and the leakage portion 1310 is arranged by penetrating through the magnetic yoke 131.

It should be noted that the number and the position of the leakage portions 1310 are not limited, and the leakage portions 1310 may be specifically arranged according to actual conditions, for example, in the present embodiment, the leakage portions 1310 include four leakage portions 1310, and the four leakage portions 1310 are respectively arranged at the four corners of 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 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 sounding monomer 1 is provided with a positioning boss 110, and the base 2 and the rear shell 3 are respectively and fixedly supported on two opposite sides of the positioning boss 110.

In the present embodiment, the positioning bosses 110 are formed by extending the frame 11 in a direction away from the sound generating unit 1 along the vibration direction of the vertical vibration system 12, and the base 2 and the rear case 3 are respectively and fixedly supported on opposite sides of the positioning bosses 110 along the vibration direction of the vibration system 12.

The base 2 comprises a base plate 21 fixed on the sounding single body 1 and a base extending wall 22 bent and extended from the base plate 21 to the rear shell 3 along the peripheral side of the basin frame 11, and the base plate 21 is provided with a through hole 23 penetrating through the base plate along the vibration direction of the vibration system 12; more specifically, the base plate 21 is fixed on one side of the frame 11 close to the diaphragm 121, the base extension wall 22 is disposed around the periphery of the frame 11 and is fixedly supported on one side of the positioning boss 110 close to the diaphragm 121, and the diaphragm 121 is disposed over against the through hole 23 to form a front sounding structure.

The rear shell 3 comprises a rear shell plate 31 spaced from the sound generating unit 1 and a rear shell extension wall 32 bent and extended from the rear shell plate 31 to the base extension wall 22 along the peripheral side of the sound generating unit 1, and the rear shell plate 31 is provided with a leakage hole 33 penetrating through the rear shell plate 31 along the vibration direction; more specifically, the back shell plate 31 is located on a side of the frame 11 away from the diaphragm 121 and spaced from the frame 11, and the back shell extension wall 32 is disposed around a peripheral side of the frame 11 and is fixedly supported on a side of the positioning boss 110 away from the diaphragm 121.

Further, the extending direction of the back-case extending wall 32 is parallel to the vibration direction of the diaphragm 121, and the extending direction of the chassis extending wall 22 is parallel to the vibration direction of the diaphragm 121. More specifically, the sealing manner between the base extension wall 22 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 rear housing extension wall 32 and the base extension wall 22 are disposed opposite to each other, and the base extension wall 22 and the rear housing extension wall 32 may be fixed by welding or gluing to form a seal.

In the above structure, the rear shell 3 and the sound generating unit 1 jointly enclose the rear sound cavity 102, the leakage portion 1310 communicates the sound generating inner cavity 103 with the rear sound cavity 102 to improve the low frequency acoustic performance, the rear shell plate 31 is provided with the leakage hole 33 penetrating through the rear sound cavity 102 along the vibration direction, and the leakage hole 33 communicates the rear sound cavity 102 with the outside. More preferably, the sound generating unit 1 further comprises a first air-permeable 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 first air-permeable damping member 1311, the first air-permeable damping member 1311 is arranged, not only is the leakage amount of the leakage portion 1310 adjusted, further, the low-frequency acoustic performance is improved, but also the foreign matter in 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 a 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, the leakage hole may be disposed through the rear housing extension wall.

Therefore, the above-mentioned sound production device 100 of the present invention forms a closed rear sound cavity structure, which is simple in structure, on one hand, improves the acoustic performance, especially the low frequency acoustic performance, of the sound production device 100, and on the other hand, because of the existence of the rear sound cavity 102 structure, the base 2 and the rear shell 3 form a vibration absorption effect, so that the sound production device 100 cannot cause the electronic products such as the mobile terminal to generate shell vibration after being applied to the electronic products such as the mobile terminal, and the user experience effect of the client is effectively increased; in addition, the base 2 and the rear shell 3 are respectively and fixedly supported on two opposite sides of the positioning boss 110 of the sound generating unit 1, so that the limit of the sound generating unit 1 in the vibration direction of the vibrating diaphragm 121 is realized, and the fixing reliability between the base 2 and the rear shell 3 and the sound generating unit 1 is improved. The falling of the sounding unit 1 under the condition that the sounding device 100 falls is effectively avoided.

It should be noted that the structural form of the positioning boss 110 is not limited, for example, in the first embodiment, the positioning boss 110 includes a plurality of positioning bosses 110, the base extension wall 22 and the rear shell extension wall 32 are respectively and fixedly supported on the plurality of positioning bosses 110, and the base extension wall 22 and the rear shell extension wall 32 are arranged at intervals with the basin frame 11 of the sound generating unit 1, at this time, since the base extension wall 22 and the rear shell extension wall 32 are spaced along the vibration direction of the vibrating diaphragm 121 and the glue containing space 10 is formed between adjacent positioning bosses 110, glue needs to be filled in the glue containing space 10 to form a seal between the base extension wall 22 and the rear shell extension wall 32. Of course, in other embodiments, the rear shell extension wall and the base can be completely attached and fixed to the outer periphery of the basin frame so that the rear shell extension wall and the base extension wall are sealed with the basin frame.

More preferably, as an embodiment derived from the first embodiment, specifically referring to fig. 4, the positioning boss 110a is annular, the base extension wall 22a and the rear shell extension wall 32a are respectively and fixedly supported at two opposite sides of the positioning boss 110a and form a seal with the positioning boss 110a, further, both the base extension wall 22a and the rear shell extension wall 32a are fixed with the positioning boss 110a by welding or gluing to form a seal, and at this time, the rear sound cavity is directly enclosed by the rear shell 3a and the sound generating unit 1 a; by providing the annular positioning boss 110a, the positioning boss 110a completely abuts against the chassis extension wall 22a and the rear case extension wall 32a, respectively, so that the sealing performance between the positioning boss 110a and the chassis extension wall 22a and the rear case extension wall 32a is further improved.

It should be noted that the specific location of the positioning boss is not limited thereto, and in other embodiments, it is also feasible that the positioning boss is formed by protruding and extending the magnetic circuit system, for example, as shown in fig. 5-6, the yoke 131b of the magnetic circuit system 13b protrudes and extends to form a positioning boss 1310b, and the base 2b and the rear shell 3b are respectively fixed on two opposite sides of the positioning boss 1310 b; of course, as shown in fig. 7, when the positioning boss is disposed on the magnetic circuit system, the positioning boss 1330c may also be formed by the upper clamp plate 133c of the magnetic circuit system 13c protruding and extending in a direction away from the sound-generating unit 1c, and the specific position of the positioning boss may be specifically selected according to the actual design requirement.

Referring to fig. 1-3, in the first embodiment, the base 2 and the rear housing 3 may be made of one of metal, ceramic and glass, for example, the base 2 and the rear housing 3 are made of metal materials, the metal materials include but are not limited to steel, iron, copper, etc., the base 2 and the rear housing 3 together form a metal cover, and the base 2 or the rear housing 3 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 sound production of the sound production unit 1, effectively improve the reliability of the vibration sound production of the sound production unit 1, and effectively improve the sound production 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 22 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 rear case extension wall 32 is provided with a space from at least one side of the tub 11, and the space is less than 3 times the thickness of the rear case extension wall 32. Certain assembly clearance has been reserved for the assembly of sound production monomer 1 to this interval, consequently makes sound production monomer 1 assemble to base 2 more swiftly in, improves assembly efficiency, also can not occupy more simultaneously the horizontal space that sound production device 100 was shared in the perpendicular to vibration direction.

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 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 should be noted that the base 2 and the rear shell 3 are both of a wall thickness structure, for example, in the first embodiment, the base 2 and the rear shell 3 are made of steel sheets with a thickness of 0.15mm by 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.

For example, the distance between the base extension wall 22 and the basin stand 11 is less than or equal to 0.05mm, and similarly, the distance between the rear shell extension wall 32 and the basin stand 11 is also less than or equal to 0.05 mm. The thickness of the positioning boss 110 in the vertical vibration direction is less than or equal to 0.20 mm.

In the present embodiment, the distance between the base extension wall 22 and the tub 11 and the distance between the rear case extension wall 32 and the tub 11 are both set to 0.05mm, and the thickness of the positioning boss 110 in the vertical vibration direction is set to 0.20 mm. After the structure is arranged, under the condition of ensuring the structural strength stability of the base 2 and the rear shell 3, the size of the sounding device 100 is relatively minimum along the single side perpendicular to the vibration direction, the size of the single side is only increased by 0.20mm, and the application of the sounding device in a portable mobile terminal electronic product is not influenced.

Referring to fig. 1 to 3, in the first embodiment, preferably, in order to ensure the reliability of the front sounding structure, in the first embodiment, the sounding unit 1 further includes a front cover 14 that is fixed to the vibrating diaphragm 121 at a side away from the frame 11 and encloses the vibrating diaphragm 121 to form the sounding cavity 101. The front cover 14 is provided with a sound outlet 140 penetrating therethrough in the vibration direction, and the sound outlet chamber 101 communicates with the outside through the sound outlet 140, which improves the middle frequency and high frequency performance of the sound generating device 100. In the present embodiment, the base plate 21 is fixed to the periphery of the front cover 14 by pressing, and the front cover 14 is exposed to the base 2 through the through hole 23.

Further, the front cover 14 includes a sound-emitting plate 141 disposed at an interval with the diaphragm 121, a connecting wall 142 extending from the sound-emitting plate 141 to the diaphragm 121 in a bending manner along the vibration direction, and a front cover plate 143 extending from one side of the connecting wall 142 close to the diaphragm 121 in a bending manner along the vertical vibration direction, the sound-emitting plate 141 is located outside the base plate 21, the connecting wall 142 is disposed through the through hole 23, the front cover plate 143 is sandwiched and fixed between the diaphragm 121 and the base plate 21, and the sound-emitting hole 140 penetrates through the sound-emitting plate 141. Through the setting of protecgulum 14 for vibrating diaphragm 121 is at the internal vibration sound production of sound cavity 101, and vibrating diaphragm 121 is at the internal vibration sound production of an independent cavity, has avoided external environment to produce harmful effects to the vibration of vibrating diaphragm 121 as far as possible, in order to guarantee the reliability of vibration sound production, further perfect the intermediate frequency high frequency acoustic performance of sound production device 100.

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.

In order to further improve the middle-frequency and high-frequency acoustic performance of the sound generating device 100, preferably, the sound generating device 100 includes a second air-permeable damping member 15 attached to the front cover 14, and more specifically, the second air-permeable damping member 15 covers the sound outlet plate 141 and completely covers the sound outlet hole 140, the sound outlet cavity 101 is communicated with the outside through the sound outlet hole 140 and the second air-permeable damping member 15 in sequence, and through the arrangement of the second air-permeable damping member 15, on one hand, the sound generating device is used for preventing dust and foreign matters from entering the sound outlet cavity 101 to affect the sound generating effect, so that the sound generating reliability is higher, and on the other hand, the middle-frequency and high-frequency performance of the sound generating device 100 can be adjusted by adjusting the damping of the second.

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 sound-generating device 100d of the second embodiment is basically the same as the sound-generating device of the first embodiment, and the same parts are not described again, and the main differences of the sound-generating device 100d of the second embodiment are as follows:

in the second embodiment, the base 2d and the rear case 3d are made of metal materials, and a conductive member 4d is provided. For example, the base 2d and the rear case 3d are each made by drawing a steel sheet having a thickness of 0.15 mm.

Specifically, the sounding device 100d further includes a conductive piece 4d, one end of the conductive piece 4d is connected to the base 2d or the rear shell 3d, and the other end of the conductive piece 4d is grounded, so that a shielding effect is formed, the sounding unit 1d 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 100e 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 100e of the third embodiment are not repeated one by one, but the main difference of the sound device 100e of the third embodiment lies in:

in the third embodiment, the conductive piece 4e and the rear shell 3e are of an integral structure, the conductive piece 4e is formed by extending the rear shell 3e to the direction far away from the basin stand 11e, and the conductive piece 4e is located at the outer sides of the base 2e and the rear shell 3e and is used for grounding, so that a shielding effect is formed, the sounding unit 1e 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 base are of an integral structure, and the conductive element is formed by extending the base to a direction far away from the sounding monomer.

Embodiment IV

Please refer to fig. 10-11, which are schematic cross-sectional views of a fourth embodiment of the sound generating device of the present invention. The sounding device 100f of this embodiment is basically the same as the sounding device of the first embodiment, and the same parts of the sounding device and the first embodiment are not described in detail, but the main difference between the sounding device and the first embodiment is that a conductive device is provided in the fourth embodiment, and the specific arrangement of the conductive device in the fifth embodiment is expanded as follows:

the sounding device 100f further comprises a conductive piece 4f and a soldering lug 5f fixed on the basin frame 11f and electrically connected with the vibration system, wherein the conductive piece 4f comprises two electrical paths, one electrical path is used for connecting the sounding monomer 1f with an external electrical signal and supplying power to the sounding monomer 1f, and the other electrical path is used for grounding the base 2f or the rear shell 3f to form shielding of the sounding monomer 1 f.

In the fourth embodiment, the conductive piece 4f is used for forming a shielding effect together with the base 2f and the rear case 3f, and simultaneously is used for supplying power to the sounding single body 1f, so that double functions are simultaneously realized through the conductive piece 4f with a simple structure.

For example, the conductive member 4f is an FPC structure, and the conductive member 4f includes a first arm 41f penetrating the rear housing extension wall 32f, a second arm 42f extending from opposite ends of the first arm 41f toward the sound generating unit 1f, a third arm 43f extending from the first arm 41f toward a direction away from the sound generating unit 1f, and a fourth arm 44f extending from the first arm 41f toward a direction away from the base 2f and fixed to the rear housing 3 f.

The first arm 41f is electrically connected to the rear case extension wall 32 f; the second arm 42f is fixed on the basin frame 11f of the sounding monomer 1f and is electrically connected with the vibration system 12f through the welding lug 5f to supply power to the vibration system 12 f; the third arm 43f is used for connecting external electrical signals; the fourth arm 44f is used for grounding. That is, the first arm 41f and the fourth arm 44f jointly realize the connection between the rear case 3f and the ground, and in the present embodiment, one electrical path for shielding the sound generating unit 1f is formed; the first arm 41f, the second arm 42f and the third arm 43f jointly realize electrical connection of the sound generating unit 1f with an external electrical signal, and realize another electrical path for communication of the sound generating unit 1f with the external electrical signal.

Through the arrangement of the conductive piece 4f, the electric signal is provided for the sounding monomer 1f, and meanwhile, a barrier effect can be formed, so that the design of the sounding device 100f 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 100g of the fifth embodiment is obtained by adding a side sound generating structure 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, but the main difference points of the sound generating device 100g of the fifth embodiment are as follows:

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

Specifically, the sound production device 100g further comprises a sound guide shell 6g which is arranged on one side, far away from the rear shell 3g, of the base 2g, the sound guide shell 6g, the base 2g and the front cover 14g jointly enclose a sound guide cavity 60g, and the sound production device comprises a vibrating diaphragm 121g and a front cover 14g which is fixed on the vibrating diaphragm 121g and far away from one side of the rear shell 3 g. The front cover 14g and the diaphragm 121g enclose a sound outlet cavity 101g, and the sound guide cavity 60g is communicated with the sound outlet cavity 101g through a sound outlet hole 140g penetrating through the front cover 14 g. The side of the sound guide shell 6g opposite to the base extension wall 22g is provided with a side sound hole 620g penetrating through the sound guide shell, and the side sound hole 620g communicates the sound guide cavity 60g with the outside to form a side sound emitting structure.

Further, the sound guiding shell 6g comprises a sound guiding shell plate 61g opposite to the base plate 21g at intervals and a sound guiding shell extension wall 62g which is bent from the periphery of the sound guiding shell plate 61g to the base 2g and is supported and fixed on the periphery of the base plate 21g, and the side sound hole 620g penetrates through the sound guiding shell extension wall 62g, so that a side sound production structure is formed, and flexible application of different installation positions is facilitated.

It should be noted that, in other embodiments, the sound guiding shell extension wall 62g and the base extension wall 22g of the base 2g are integrally formed, which effectively simplifies the assembly process, and the sound guiding shell does not need to be assembled additionally, so that the side sound emitting structure is formed more reliably.

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 sounding device 100h of the sixth embodiment is obtained by adding a ventilation spacer on the basis of the sounding 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, but the main difference points of the sounding device 100h of the sixth embodiment are as follows:

the sound production device 100h further comprises a ventilation spacer 7h positioned in the rear sound cavity 102h, wherein the ventilation spacer 7h comprises a spacer body 71h arranged opposite to the rear shell plate 31h of the rear shell 3h at a spacing, a spacer extension part 72h bent and extended from the periphery of the spacer body 71h to the direction of the rear shell plate 31h, and a spacer fixing part 73h bent and extended from one end of the spacer extension part 72h far away from the spacer body 71 h; the spacer extension part 72h and the rear case extension wall 32h are arranged at an interval, and the spacer fixing part 73h is fixed to the rear case 3 h; the ventilating isolation piece 7h and the rear shell 3h together enclose a powder filling space 70 h.

Irritate powder space 70h and be used for the filling sound absorbing material, pack sound absorbing material in back sound chamber 102h, if inhale the sound granule, ventilative isolator 7h has effectually prevented that to inhale the sound granule and has got into inside the sound production monomer 1h, has avoided the risk of sound production inefficacy, has improved the reliability.

In the sixth embodiment, more specifically, the spacer fixing portion 73h is fixed to the rear housing plate 31h, and the spacer extension portion 72h and the rear housing extension wall 32h of the rear housing 3h are spaced from each other, so that the ventilation smoothness of the rear acoustic cavity 102h can be effectively increased, and the stability of the low-frequency sound production performance can be improved.

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 100i shown in fig. 14, one side of the spacer body 71i close to the sound generating unit 1i is recessed in a direction away from the sound generating unit 1i to form an avoiding step 710i, and the avoiding step 710i is disposed opposite to the leakage portion 1310 i. This structural arrangement can make the leakage of the sounding inner cavity 103i of the sounding unit 1i 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 100j 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 100j of the seventh embodiment are as follows:

the sound device 100j further includes at least two spacers 8j and each of the spacers is connected to the base 2 j.

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

Furthermore, one end of each positioning plate 8j, which is far away from the base 2j, is provided with a positioning hole 80j penetrating through the positioning plate for fixing and positioning the sound generating device 100j and the terminal using whole machine, for example, a threaded hole, and a screw can be fixed on the terminal using whole machine through the positioning hole 80j, so that the terminal using whole machine is simple and convenient, and the two positioning plates 8j can be more effectively positioned and fixed. In order to further improve the fixing stability, the two positioning pieces 8j are connected to two opposite sides or two pairs of corners of the base 2j, and the sound generating device 100j and the terminal complete machine are symmetrically arranged to have better positioning and fixing effects. In the present embodiment, the positioning piece 8j is fixed to the base 2j by welding, that is, the positioning piece 8j and the base 2j are a two-piece structure. 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 arranged at one ends of the positioning pieces far away from the rear shell.

Referring to fig. 16, fig. 16 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. 16 in that in the sound generating device 100k of the present embodiment, the positioning plate 8k is formed by extending the base 2k or the rear housing 3k away from the sound generating unit 1k, that is, the positioning plate 8k and the base 2k or the rear housing 3k are integrally formed, so that the forming is simple, the number of components is reduced, and the assembly efficiency is improved.

Compared with the prior art, the utility model discloses an among the sound production device, cover respectively through design base and backshell and locate the relative both sides of sound production monomer, and make the backshell, base and sound production monomer enclose into the back sound chamber jointly, the backshell sets up the leakage hole and communicates back sound chamber with the external world, above-mentioned structure has formed inclosed back sound chamber structure, simple structure not only, the sound production device is whole to increase along the horizontal dimension perpendicular to the vibration direction of vibration system for a short time, and make the acoustics effect of sound production device more excellent, and inclosed back sound chamber structure makes base and backshell can be used for absorbing vibration, thereby make this sound production device avoid the production of shell phenomenon after applying to mobile terminal, make user experience effect better; in addition, the base and the rear shell are respectively and fixedly supported on the two opposite sides of the positioning boss of the sounding monomer, so that the limit of the sounding monomer in the vibration direction is realized, the fixing reliability between the base and the rear shell as well as the sounding monomer is improved, and the falling of the sounding monomer under the condition that the sounding device falls is effectively avoided.

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 single body and is characterized in that the sounding single body is provided with a positioning boss; the sounding device also comprises a base and a rear shell which are fixedly supported on two opposite sides of the positioning boss respectively;

2. The sounder device according to claim 1, wherein the positioning bosses are spaced apart from one another, and the base extension wall and the rear housing extension wall are respectively fixedly supported by the plurality of positioning bosses.

3. The sound production device of claim 2, wherein the rear housing extension wall and the base extension wall are both attached to the sound production unit so that a seal is formed between the rear housing extension wall and the base extension wall and the sound production unit.

4. The sound production device as claimed in claim 2, wherein the base extension wall and the rear housing extension wall are spaced apart from the sound production unit, and the base extension wall and the rear housing extension wall are spaced apart from each other and form a glue containing space between adjacent positioning bosses, and the glue containing space is filled with glue to form a seal between the base extension wall and the rear housing extension wall.

5. The sounder device according to claim 1, wherein the locating boss is annular, and the base extension wall and the rear housing extension wall are respectively fixedly supported on opposite sides of the locating boss and form a seal with the locating boss.

6. The sounder device according to claim 5, wherein the base extension wall and the rear housing extension wall are each secured to the locating boss by welding or gluing to form a seal.

7. The sound production device according to any one of claims 1-6, wherein the sound production unit comprises a basin frame, and the positioning boss is formed by protruding and extending the basin frame in a direction away from the sound production unit; the base plate is fixed in the basin frame, the base extends the wall with the backshell extends the wall and encircles basin frame week side sets up.

8. The sounding device according to claim 7, wherein the sounding unit comprises a vibration system fixed on the frame, the positioning boss protrudes and extends in a direction away from the sounding unit along a vibration direction perpendicular to the vibration system, and the base extension wall and the rear housing extension wall are fixed on two opposite sides of the positioning boss along the vibration direction of the vibration system.

9. The sounding device according to any one of claims 1 to 6, wherein the sounding unit comprises a basin frame, a vibration system respectively supported and fixed on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and sound, and the positioning boss is formed by protruding and extending the magnetic circuit system in a direction away from the sounding unit; the base plate is fixed in the basin frame, the base extends the wall with the backshell extends the wall and encircles basin frame week side sets up.

10. The sounding device according to claim 9, wherein the magnetic circuit system comprises a magnetic yoke fixed to the basin stand and a magnetic steel unit fixedly supported by the magnetic yoke, and the positioning boss is formed by a protruding extension of a peripheral edge of the magnetic yoke in a direction away from the sounding single body.

11. The sounding device according to claim 9, wherein the magnetic circuit system comprises a magnetic yoke fixed to the basin frame, a magnetic steel unit fixedly supported by the magnetic yoke, and an upper clamping plate fixed to the basin frame and covering an end of the magnetic steel unit far away from the magnetic yoke, and the positioning boss is formed by protruding and extending the upper clamping plate in a direction far away from the sounding unit.

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

13. The sounder device according to claim 12, wherein the base or the rear housing is at least partially configured for grounding.

14. The sounder device according to claim 12, further comprising a conductive member, one end of the conductive member being connected to the base or the rear housing, the other end of the conductive member being adapted to be grounded.

15. The sounder device according to claim 14, wherein the conductive member is formed by an extension of the base or the rear housing.

16. The sounder device according to claim 12, 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 base or the rear housing.

17. The sounder device according to claim 1, further comprising at least two positioning tabs connected to opposite sides or two pairs of corners of one of the base and the rear housing, wherein one end of the positioning tab remote from the base or the rear housing is provided with a positioning hole therethrough.

18. The sound generator of claim 17, wherein the locating tab is formed by the base or the rear housing extending away from the sound generating unit.

19. The sound production device according to claim 1, further comprising a sound guiding shell covering the base and located on a side of the base away from the back shell, wherein the sound guiding shell has a sound guiding cavity forming a side sound production structure, the sound production unit comprises a basin frame, a vibrating diaphragm fixed to the basin frame and close to the side of the base, and a front cover fixed to a side of the vibrating diaphragm away from the back shell, the front cover and the vibrating diaphragm enclose to form a sound outlet cavity, the front cover is provided with a sound outlet penetrating through the front cover, and the sound guiding cavity is communicated with the sound outlet cavity through the sound outlet.

20. The sound production device as claimed in claim 19, wherein the sound guide shell comprises a sound guide shell plate spaced from and opposed to the base plate and a sound guide shell extension wall extending from a peripheral edge of the sound guide shell plate towards the base and supported by and secured to the peripheral edge of the base plate, the sound guide shell extension wall being provided with a side sound aperture therethrough.

21. 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 isolating piece extending part and the rear shell extending wall are arranged at intervals, and the isolating piece fixing part is fixed on the rear shell; the breathable isolating piece and the rear shell jointly enclose a powder filling space.

22. The sound production device according to claim 21, 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.

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

24. 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 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.

25. The sound production device of claim 24, wherein the sound production unit comprises a diaphragm fixed to the frame for vibrating and producing sound, and an area ratio of a forward projection of the sound production unit to the rear housing along a vibration direction of the diaphragm to a projection plane of the rear housing is at least 4/5.