CN217240925U

CN217240925U - Sound production module and electronic equipment

Info

Publication number: CN217240925U
Application number: CN202220985128.8U
Authority: CN
Inventors: 方亚辉
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-08-19
Anticipated expiration: 2032-04-26

Abstract

The utility model discloses a sound production module and electronic equipment, sound production module includes metal casing, sound production monomer and expands the casing, metal casing includes first casing and the second casing that is connected, both enclose to close and are formed with and hold the chamber, sound production monomer locates and holds the intracavity, sound production monomer includes inner shell, vibration system and magnetic circuit, vibration system includes annular vibrating diaphragm and the voice coil loudspeaker voice coil that drives the vibration of annular vibrating diaphragm, the inward flange of annular vibrating diaphragm is fixed in magnetic circuit, the outward flange is fixed in the inner shell, sound production monomer encloses with first casing and closes and forms the front chamber, enclose with the second casing and form the back chamber, sound production monomer's middle part is seted up the via hole that link up; the expansion shell is connected to the edge of the via hole and covers the opening of the via hole, an expansion cavity is formed by enclosing the expansion shell, and the expansion cavity is communicated with the rear cavity through the via hole. The utility model discloses technical scheme aims at make full use of accommodation chamber space, enlarges the back cavity volume, promotes the low frequency performance of sound production module.

Description

Sound production module and electronic equipment

Technical Field

The utility model relates to an electronic product technical field, in particular to sound production module and applied this sound production module's electronic equipment.

Background

The sound production module can be used for converting an electric signal into a sound signal, and is an important energy conversion device. Be formed with accommodation space in the casing of sound production module under the typical conditions, be equipped with the support in the accommodation space, the sound production monomer is located accommodation space to connect the support, sound production monomer and support separate accommodation space for antechamber and back chamber, and the casing sets up the phonate hole of intercommunication antechamber, the sound production monomer will be converted into the signal of sound energy and carry out the sound production through the mode of vibration, the sound wave is propagated in antechamber and back chamber, and spread through the phonate hole, in order to make a sound.

Along with the cell-phone is left for the space of vocal module and is littleer and littleer, traditional speaker structure can not effectively utilize limited module space, leads to the back chamber small, and the low frequency performance is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sounding module aims at making the back chamber volume increase of sounding module, improves the low frequency performance.

In order to achieve the above object, the utility model provides a sound production module, sound production module includes:

the metal shell comprises a first shell and a second shell which are connected, the first shell and the second shell are enclosed to form an accommodating cavity, and the first shell is provided with a sound outlet communicated with the accommodating cavity;

the sound generating unit is arranged in the accommodating cavity and comprises an inner shell, a vibration system and a magnetic circuit system, the vibration system comprises an annular vibrating diaphragm and a voice coil for driving the annular vibrating diaphragm to vibrate, the inner edge of the annular vibrating diaphragm is fixed to the magnetic circuit system, the outer edge of the annular vibrating diaphragm is fixed to the inner shell, the sound generating unit and the first shell are enclosed to form a front cavity, the sound generating unit and the second shell are enclosed to form a rear cavity, and a through hole is formed in the middle of the sound generating unit; and

the expansion shell is connected to the edge of the through hole and covers the opening of the through hole, an expansion cavity is formed by enclosing the expansion shell, and the expansion cavity is communicated with the rear cavity through the through hole.

Optionally, the inner shell is connected to a cavity wall of the accommodating cavity, the magnetic circuit system is provided with a first avoiding hole, the annular diaphragm is provided with a second avoiding hole, the first avoiding hole and the second avoiding hole jointly form the via hole, and the expansion shell is arranged on one side of the annular diaphragm, which is away from the magnetic circuit system.

Optionally, the cross section of the expansion cavity is rectangular, and the height of the expansion cavity in the axial direction of the via hole ranges from 0.8mm to 0.85 mm;

and/or a gap is formed between the surface of the expansion shell facing away from the magnetic circuit system and the inner surface of the first shell.

Optionally, at least one of the expansion cavity, the via hole and the rear cavity is potted with sound absorbing particles.

Optionally, the expansion shell is made of a steel sheet or a magnetizer;

and/or the expansion shell and the annular diaphragm are connected in a bonding or welding mode.

Optionally, the magnetic circuit system includes a magnetic yoke, a central magnetic circuit disposed on the magnetic yoke, and a side magnetic circuit, and a magnetic gap is formed between the side magnetic circuit and the central magnetic circuit;

the voice coil is suspended in the magnetic gap, the inner edge of the annular diaphragm is fixed to the central magnetic circuit, and the first avoidance hole penetrates through the magnetic yoke and the central magnetic circuit.

Optionally, the central magnetic circuit includes a first central magnet, a central magnetic conductive plate, and a second central magnet that are sequentially stacked on the magnetic conductive yoke, the edge magnetic circuit includes an edge magnet and an edge magnetic conductive plate that are sequentially stacked on the magnetic conductive yoke, and the inner edge of the annular diaphragm is fixed to the second central magnet.

Optionally, the annular diaphragm includes an edge diaphragm, a dome and a center diaphragm, which are connected to each other, the dome is disposed between the edge diaphragm and the center diaphragm, an outer edge of the edge diaphragm is connected to the inner casing, an inner edge of the center diaphragm is connected to the magnetic circuit, and a folded ring of the center diaphragm is recessed in a direction away from the magnetic circuit;

the expansion shell is connected to the surface of the central vibrating diaphragm, which is far away from the magnetic circuit system.

Optionally, a sound outlet portion is further disposed on the outer side of the first shell, and the sound outlet portion is communicated with the sound outlet hole.

The utility model discloses still provide an electronic equipment, electronic equipment includes as above arbitrary sound production module.

The utility model discloses technical scheme's sound production module's metal casing includes first casing and second casing, and both enclose to close to be formed with and hold the chamber, supply the sound production monomer to install. The sound production monomer includes interior casing, vibration system and magnetic circuit, interior casing connection is in the chamber wall that holds the chamber, and be used for fixed vibration system and magnetic circuit, the inward flange of annular vibrating diaphragm is fixed in magnetic circuit, the outward flange of annular vibrating diaphragm is fixed in interior casing, thereby the voice coil loudspeaker voice coil moves under magnetic circuit's drive and drives annular vibrating diaphragm vibration sound production, the sound after the conversion of sound production monomer is through the propagation in preceding chamber and back chamber, finally spread from the phonate hole, realize the sound production. Here, offer the via hole that link up with the sound production monomer to cover an expansion casing in via hole department, this expansion casing is formed with the expansion chamber, and through via hole intercommunication rear chamber, so, can all regard as the expansion space of rear chamber with the space of sound production monomer self and the space of partial front chamber, so, increased the whole rear chamber volume of sound production module, show improvement low frequency performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 according to the structures shown in the drawings without creative efforts.

Fig. 1 is a cross-sectional view of the sound module according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the sound module of FIG. 1 taken in another direction;

fig. 3 is a schematic structural view of the sounding unit and the expansion case in the sounding module of fig. 1;

FIG. 4 is a schematic structural view of the sound generating unit and the expansion housing shown in FIG. 3;

FIG. 5 is a cross-sectional view of the sound emitting unit and the expansion housing of FIG. 3;

fig. 6 is an exploded view of the sound unit and the extension case shown in fig. 3.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

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.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, the descriptions in the present application related to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of technical features indicated are implicitly being indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a sound production module 100.

Referring to fig. 1 and fig. 2, in an embodiment of the present invention, the sound module 100 includes: the sound-emitting device comprises a metal shell 10, a sound-emitting unit 30 and an expansion shell 50, wherein the metal shell 10 comprises a first shell 11 and a second shell 13 which are connected, the first shell 11 and the second shell 13 enclose to form an accommodating cavity, and the first shell 11 is provided with a sound outlet 1133 communicated with the accommodating cavity;

the sounding single body 30 is arranged in the accommodating cavity, the sounding single body 30 includes an inner shell 31, a magnetic circuit system 33 connected to the inner shell 31, and a vibration system 35, the vibration system 35 includes an annular diaphragm 351 and a voice coil 353 for driving the annular diaphragm 351 to vibrate, an inner edge of the annular diaphragm 351 is fixed to the magnetic circuit system 33, an outer edge of the annular diaphragm 351 is fixed to the inner shell 31, the sounding single body 30 and the first shell 11 enclose to form a front cavity 100a, the sounding single body 30 and the second shell 13 enclose to form a rear cavity 100b, and a through hole 30a is formed in the middle of the sounding single body 30;

the expansion housing 50 is connected to an edge of the through hole 30a and covers an opening of the through hole 30a, an expansion cavity 50a is formed by the expansion housing 50 in a surrounding manner, and the expansion cavity 50a is communicated with the rear cavity 100b through the through hole 30 a.

In this embodiment, the sound module 100 is used to provide an electroacoustic conversion function for the applied device, the metal casing 10 included therein provides an installation foundation and a protection foundation for the sound unit 30, and the metal casing 10 includes the first casing 11 and the second casing 13 connected to each other, so as to conveniently assemble the sound unit 30. The two can be detachably connected, clamped or inserted, so that the subsequent maintenance and replacement can be conveniently carried out; the connection can also be a fixed connection, for example by gluing or welding, so that better connection stability and sealing effect are achieved.

It can be understood, metal casing 10's material is the metal, so first casing 11 and second casing 13's material is the metal, because the metal has the thin and great characteristic of structural strength of wall thickness, metal casing 10 guarantees that sound production module 100 plays good supporting effect under the thin condition of wall thickness, makes this sound production module 100's appearance smaller and more exquisite, and improves the inner space, can further promote the volume in back chamber, and then promotes sound effect. Here, the cross section of the metal housing 10 is rectangular, and the longitudinal section of the metal housing 10 is also rectangular, so that the assembly is convenient, and the metal housing is matched with the rectangular sounding single body 30, so that the overall size is further reduced, and the space utilization rate is improved. Of course, in other embodiments, the cross-sectional shape of the metal housing 10 may also be circular/polygonal, irregular, etc., and the longitudinal cross-sectional shape may be semicircular, polygonal, irregular, etc., which is specifically selected according to the use requirement and the shape of the sounding unit 30.

Optionally, the first casing 11 includes a first casing bottom wall and a first casing side wall surrounding the first casing bottom wall, and the second casing 13 includes a second casing bottom wall and a second casing side wall surrounding the second casing bottom wall, and the first casing side wall and the second casing side wall are butt-jointed to form the accommodating cavity. Of course, in other embodiments, one of the first housing 11 and the second housing 13 may be a flat plate, and the other one of the first housing and the second housing encloses to form an accommodating groove, and the two cooperate to form an accommodating cavity.

It can be understood that the sound generating unit 30 includes an inner housing 31, a magnetic circuit system 33 and a vibration system 35, and the inner housing 31 provides a mounting base for the vibration system 35 and the magnetic circuit system 33. The inner shell 31 abuts against the cavity wall of the accommodating cavity, so that a fixed structure is formed, the magnetic circuit system 33 and the vibration system 35 are respectively arranged on two side faces of the inner shell 31, and of course, a hole is formed in the middle of the inner shell 31, so that the vibration system 35 and the magnetic circuit system 33 are matched and arranged.

Simultaneously, sound production monomer 30 is located and is held the intracavity to be connected with the chamber wall that holds the chamber, in order to will hold the chamber and cut apart into antetheca 100a and back chamber 100b, here, sound production monomer 30 encloses with first casing 11 and closes formation antetheca 100a, encloses with second casing 13 and closes formation back chamber 100b, so first casing 11 has seted up out sound hole 1133, makes things convenient for the sound to flow out. The sound generating unit 30 is provided with a through hole 30a, and an axial direction of the through hole 30a is a direction from the first housing 11 to the second housing 13, so that the through hole 30a can communicate the front cavity 100a and the rear cavity 100b, and an opening shape of the through hole 30a may be a circular shape, a square shape, an irregular shape, or the like, which is not limited herein. The expansion shell 50 is connected to the via hole 30a, and the material of the expansion shell 50 may be metal, magnetic conductor, or plastic, etc., which is not limited herein, and may be sufficient to block the opening of the via hole 30a away from the rear cavity 100 b. The expansion case 50 is recessed toward the square of the front cavity 100a to form the expansion cavity 50a and communicates with the rear cavity 100b through the via hole 30a, thereby partially converting the conventional front cavity 100a into the space of the rear cavity 100b, and in turn, increasing the entire space functioning as the rear cavity 100 b.

Of course, when the front cavity 100a is formed by enclosing the second housing 13, the second housing 13 is opened with the sound outlet 1133, or the first housing 11 and the second housing 13 cooperate to form the sound outlet 1133.

The utility model discloses technical scheme's metal casing 10 of sound production module 100 includes first casing 11 and second casing 13, both enclose to close and are formed with and hold the chamber, supply sound production monomer 30 to install, sound production monomer 30 includes interior casing 31, vibration system 35 and magnetic circuit 33, interior casing 31 is connected in the chamber wall that holds the chamber, and be used for fixed vibration system 35 and magnetic circuit 33, magnetic circuit 33 is fixed in to annular vibrating diaphragm 351's inward flange, annular vibrating diaphragm 351's outward flange is fixed in interior casing 31, thereby voice coil loudspeaker voice coil 353 moves under magnetic circuit 33's drive and drives annular vibrating diaphragm 351 vibration sound production, sound after sound production monomer 30 conversion passes through preceding chamber 100a and the propagation of back chamber 100b, finally spread from sound outlet 1133, realize the sound production. Here, the sound generating unit 30 is provided with a through hole 30a, and an expansion case 50 covers the through hole 30a, and the expansion case 50 is formed with an expansion cavity 50a and is communicated with the rear cavity 100b through the through hole 30a, so that the space of the sound generating unit 30 itself and the space of a part of the front cavity 100a can be both used as the expansion space of the rear cavity 100b, and thus, the volume of the whole rear cavity 100b of the sound generating module 100 is increased, and the low-frequency performance is remarkably improved.

With reference to fig. 3 to fig. 5, optionally, the inner housing 31 is connected to a wall of the accommodating cavity, the magnetic circuit system 33 is provided with a first avoiding hole 33a, the annular diaphragm 351 is provided with a second avoiding hole 3515a, the first avoiding hole 33a and the second avoiding hole 3515a jointly form the through hole 30a, and the extension housing 50 is disposed on a side of the annular diaphragm 351 facing away from the magnetic circuit system 33.

Here, the first avoiding hole 33a is formed in the magnetic circuit system 33, and the second avoiding hole 3515a is formed in the annular diaphragm 351, so that the first avoiding hole 33a corresponds to the second avoiding hole 3515a, and the first avoiding hole and the second avoiding hole are combined into the through hole 30a in a unified manner, the expansion shell 50 is arranged on one side of the annular diaphragm 351, which is away from the magnetic circuit system 33, the space of the through hole 30a is further increased, the shape and the volume of the expansion shell 50 can be designed more flexibly, the expansion shell is not limited by the vibration system 35, the overall volume of the rear cavity 100b is further expanded, and the low-frequency performance is improved.

Here, the size of the first avoidance hole 33a may be the same as that of the second avoidance hole 3515a, and here, the opening size of the first avoidance hole 33a is not too small, otherwise, the expansion effect is not good, of course, the opening size is not too large, otherwise, the magnetic field driving of the magnetic circuit system 33 is greatly influenced, so the opening size of the first avoidance hole 33a may occupy the range of the surface area of the magnetic circuit system 33 from 1/2 to 2/3, for example, 7/12, thereby increasing the space of the via hole 30a on the basis of ensuring the structural strength. Of course, the shapes of the two are the same, so that the air flow can be facilitated, and the space of the through hole 30a can be increased.

Of course, in other embodiments, only the magnetic circuit system 33 may be provided with the hole, so that the extension case 50 is disposed on the magnetic circuit system 33 and the annular diaphragm 351 is correspondingly evacuated.

Optionally, the cross section of the expansion cavity 100b is rectangular, and the height range of the expansion cavity 100b in the axial direction of the via hole 30a is 0.8mm to 0.85 mm;

and/or a gap is formed between the surface of the expansion shell 50 facing away from the magnetic circuit system 33 and the inner surface of the first shell 11.

In this embodiment, in order to better adapt to the magnetic circuit system 33, the opening of the via hole 30a is set to be rectangular, so that the expansion casing 50 is also set to be rectangular correspondingly, so as to form a rectangular expansion cavity 100b, that is, the cross section of the expansion cavity 100b is rectangular, thus the utilization rate of the magnetic circuit system 33 can be improved, and the space is saved. The longitudinal section of the expansion cavity 100b is also rectangular, so that the height of the expansion shell 50 is not too high in order to ensure that the vibration of the vibration system 35 is not affected; of course, in order to ensure the expansion effect on the rear cavity 100b, the height of the expansion housing 50 should not be too small, and here, the height range of the expansion cavity 100b in the axial direction of the via hole 30a is set to 0.8mm to 0.85mm, for example, 0.8mm, 0.81mm, 0.83mm, 0.85mm, and the like, so that the entire volume of the rear cavity 100b is significantly increased, and the low-frequency performance is improved.

On the basis of the height range of the expansion shell 50, in order to ensure the assembling effect, a gap is formed between the surface of the expansion shell 50 departing from the vibration system 35 and the inner surface of the first shell 11, that is, a gap is formed between the surface of the expansion shell and the inner surface of the bottom wall of the first shell, so that a certain tolerance can be reserved for the machining process, the expansion shell 50 is prevented from abutting against the first shell 11, the assembling is convenient, and the assembling stability is improved. Of course, the seed case may not be separately provided with the height of the extension case 50, and a gap may be left between the seed case and the first case 11.

With continued reference to fig. 1 and 2, optionally, at least one of the expansion cavity 50a, the via hole 30a and the rear cavity 100b is filled with sound-absorbing particles.

In this embodiment, in order to further improve the low frequency effect, sound absorbing particles are filled in at least one of the spaces of the extended cavity 50a, the via hole 30a and the rear cavity 100b, for example, the extended cavity 50a is filled with the sound absorbing particles, the via hole 30a is filled with the sound absorbing particles, or the rear cavity 100b is filled with the sound absorbing particles. Since the sound-absorbing particles can absorb part of the sound signal, which is equivalent to expanding the volume of the rear cavity 100b, the resonance frequency can be reduced, and the bass can be improved. Here, as shown by the dotted lines in the figure, the sound-absorbing particles may be filled in the spaces of the expansion cavity 50a, the via hole 30a, and the rear cavity 100b, so as to achieve a better bass improving effect. Here, the material of the sound absorbing particles may be a porous material, for example, activated carbon, natural zeolite powder, activated silica, molecular sieve, or a mixture prepared according to a specific kind and ratio, and is not limited herein.

Optionally, the expansion shell 50 is made of a steel sheet or a magnetizer;

and/or the expansion shell 50 and the annular diaphragm 351 are connected by bonding or welding.

In this embodiment, the material of selecting to expand casing 50 is the steel sheet, on the one hand, convenient processing, and on the other hand, its thickness setting can be reduced to the structural strength high, guarantees the volume of the expansion chamber 50a that forms, also can reduce occupation space simultaneously, improves space utilization. Of course, the expansion housing 50 may also be made of a magnetic conductor material, so that the material is the same as that of the magnetic circuit system 33, thereby saving material cost and facilitating processing. Of course, the expansion housing 50 may be made of other metals, such as copper sheet.

When the material of the expansion housing 50 is metal, the connection mode between the expansion housing 50 and the vibration system 35 may be bonding or welding, which has high connection strength and stable connection structure, so as to improve the overall structural stability of the product.

With reference to fig. 3 to 5, the magnetic circuit system 33 may alternatively include a magnetic yoke 331, a central magnetic circuit disposed on the magnetic yoke 331, and a side magnetic circuit, wherein a magnetic gap 33b is formed between the side magnetic circuit and the central magnetic circuit; the voice coil 353 is suspended in the magnetic gap 33 b;

the inner edge of the ring-shaped diaphragm 351 is fixed to the central magnetic circuit, and the first escape hole 33a penetrates the yoke 331 and the central magnetic circuit.

In this embodiment, the magnetic circuit system 33 includes a magnetic yoke 331, a central magnetic circuit and a side magnetic circuit, the magnetic yoke 331 is connected to the inner housing 31 to form a space for installing the central magnetic circuit and the side magnetic circuit, and the connection manner of the two can be a snap connection or an insertion connection, which is not limited herein. It can be understood that, in order to realize the electro-acoustic conversion of the sounding single body 30, the central magnetic circuit and the side magnetic circuit are disposed on the magnetic yoke 331 at an interval, a magnetic gap 33b is formed between the central magnetic circuit and the side magnetic circuit, the voice coil 353 is inserted into the magnetic gap 33b, and after the voice coil 353 is energized, the magnetic circuit 33 generates a magnetic field to drive the voice coil 353 to reciprocate up and down in the magnetic gap 33b, so as to drive the annular diaphragm 351 to move and transmit the sound signal from the sound outlet 1133. Here, the first escape hole 33a penetrates the yoke 331 and the center magnetic path, so that the processing is facilitated, and the opening size of the first escape hole 33a can be designed to be large, thereby obtaining a larger volume of the back cavity 100 b. Specifically, the first avoidance hole 33a is opened in the middle of the yoke 331 and the central magnetic circuit, and the second avoidance hole 3515a is opened in the middle of the ring-shaped diaphragm 351, thereby reducing the influence on the vibration performance of the ring-shaped diaphragm 351 as much as possible.

Of course, in other embodiments, the first avoiding hole 33a may be formed at the edge of the magnetic yoke 331 and the first central magnet 333, and the second avoiding hole 3515a corresponds thereto, in which case, the expansion housing 50 is required to be annular and cover the opening of the second avoiding hole 3515 a.

In addition, in order to improve the sealing and filling performance of the sound generating module 100, the sound generating unit 30 further includes two protective nets 332, the two protective nets 332 are disposed on two opposite sides of the magnetic yoke 331, a leakage port is formed between the magnetic yoke 331 and the inner casing 31, a protective surface for covering the leakage port is formed on the protective net 332, and a leakage hole is formed on the protective surface to allow air to flow in and out, so that the internal and external air pressures of the sound generating unit 30 are balanced. This structure can significantly improve the structural stability of the sound generating unit 30 and prevent the sound absorbing particles in the rear cavity 100b from entering the sound generating unit 30. The material can be metal, so that the structural strength can be obviously enhanced, and the connection stability is improved.

Referring to fig. 5 and 6, optionally, the central magnetic circuit includes a first central magnet 333 and a central magnetic conductive plate 339 and a second central magnet 337 sequentially stacked on the magnetic yoke 331, the side magnetic circuit includes a side magnet 335 and a side magnetic conductive plate sequentially stacked on the magnetic yoke 331, and an inner edge of the annular diaphragm 351 is fixed to the second central magnet 337.

For promoting magnetic circuit 33's magnetic field, central magnetic circuit includes first center magnet 333, center magnetic conduction board 339 and second center magnet 337, first center magnet 333 surface of deviating from magnetic yoke 331 is located to center magnetic conduction board 339, can promote the magnetic field effect of first center magnet 333, prevent that the magnetic force line from leaking, second center magnet 337 can further increase magnetic field intensity, thereby promote magnetic field driving force, guarantee the annular vibrating diaphragm 351 vibration performance of vocal module 100. In order to form the via hole 30a, the first avoiding hole 33a further penetrates through the middle portion of the second center magnet 337 and the middle portion of the center magnetic conductive plate 339, so that the extension case 50 connected to the ring-shaped diaphragm 351 may communicate with the rear cavity 100b, increasing the volume of the rear cavity 100 b. Here, the shape and size of the holes formed in the first central magnet 333, the central magnetic conductive plate 339, and the second central magnet 337 are all the same, so as to ensure the space of the via hole 30a as much as possible and increase the volume of the rear cavity 100 b. Similarly, the edge magnetic conductive plate can also improve the magnetism of the edge magnet 335, further improving the vibration effect.

With reference to fig. 5 and fig. 6, optionally, the annular diaphragm 351 includes an edge diaphragm 3511, a dome 3513, and a central diaphragm 3515, which are connected to each other, the dome 3513 is disposed between the edge diaphragm 3511 and the central diaphragm 3515, an outer edge of the edge diaphragm 3511 is connected to the inner housing 31, an inner edge of the central diaphragm 3515 is connected to the magnetic circuit 33, the second avoiding hole 3515a penetrates through the central diaphragm 3515, and a folded ring of the central diaphragm 3515 is recessed in a direction away from the magnetic circuit 33.

In this embodiment, because two central magnets are disposed in the magnetic circuit system 33, the height of the middle structure is high, in order to reduce interference between the annular diaphragm 351 and the magnets, the annular diaphragm 351 is divided into the edge diaphragm 3511 and the central diaphragm 3515, and the folded ring of the central diaphragm 3515 faces the square recess deviating from the magnetic circuit system 33, so as to adjust the vibration direction of the central diaphragm 3515 and avoid interference with the magnetic circuit system 33.

The outer periphery of the edge diaphragm 3511 is fixed to the inner housing 31, and here, the outer periphery of the edge diaphragm 3511 may be bent outward vertically, so as to form a covered edge covering the periphery of the inner housing 31, thereby forming a more stable connection structure. The inner periphery of the edge diaphragm 3511 is connected with the central diaphragm 3515 through a dome 3513, the dome 3513 is of a planar structure, a central hole 3513a is formed in the middle of the dome 3513, the overall structure of the dome is annular, and in order to avoid the second central magnet 337, the opening size of the central hole 3513a can be larger than the surface area of the second central magnet 337. The outer circumference of the central diaphragm 3515 is connected to the edge of the central hole 3513a, the inner circumference is fixed to the second central magnet 337, and the extension case 50 is connected to the central diaphragm 3515 and located at the opening circumference of the second escape hole 3515a, and vibrates up and down through the edge diaphragm 3511, the dome 3513, and the corrugated rim portion of the central diaphragm 3515. And the opening of the second escape hole 3515a is slightly larger than the opening size of the first escape hole 33a, thereby making the connection of the expansion case 50 more stable.

Meanwhile, in order to further improve connection stability, the extension case 50 includes an extension bottom wall 51 and an extension side wall 53 formed by bending the extension bottom wall 51, and a peripheral edge of the extension side wall 53 is also bent and extended to form a folded edge 55, and is parallel to the extension bottom wall 51, and is connected, for example, adhered or welded, to the surface of the central diaphragm 3515 through the folded edge 55, so that a contact area can be increased, and connection stability is further ensured. The outward flange butt of hem 55 center vibrating diaphragm 3515 edge in the book ring to can play better positioning action, make things convenient for the equipment more. The expansion case 50 is an integrally formed structure, so that the structural strength thereof can be ensured.

In addition, the middle portion of the edge diaphragm 3511 is also in a corrugated rim structure, and the corrugated rim of the edge diaphragm 3511 is recessed toward the magnetic circuit system 33. Of course, if necessary, the recess direction of the edge diaphragm 3511 may be away from the magnetic circuit system 33.

Based on the above structure, the voice coil 353 is attached to the surface of the dome 3513 facing away from the center diaphragm 3515 and near the center hole 3513a so as to be just inserted into the magnetic gap 33 b. Of course, in order to better ensure the vertical movement of the voice coil 353, the vibration system 35 further includes four centering fins 355, the four centering fins 355 are respectively located at four corners of the voice coil 353, one end of each centering fin 355 is connected to the voice coil 353, and the other end of each centering fin 355 is connected to the inner housing 31, so as to improve the vibration stability of the voice coil 353 and ensure the acoustic effect. The centering support 355 has a planar structure, so as to occupy no space and reduce the overall volume of the sound module 100.

Optionally, a sound outlet 113 is further disposed outside the first housing 11, and the sound outlet 113 is communicated with the sound outlet 1133.

In this embodiment, the first housing 11 includes a main body 111 and a sound outlet 113, the main body 111 includes a first housing bottom wall and a first housing side wall, the main body 111 is provided with a communication hole 1111, the sound outlet 113 is located on a side of the first housing side wall of the main body 111 away from the accommodating cavity, a sound channel 1131 and a sound outlet 1133 formed by the sound outlet 113 can communicate the front cavity 100a with the outside, so that the sound module 100 forms a side sound outlet structure, and sound signals are transmitted to the outside through the front cavity 100a, the sound channel 1131 and the sound outlet 1133.

The sound emitting part 113 can be made of a plastic piece, and the plastic piece is easy to form into a product with a complex structure in a processing mode, so that the sound emitting part 113 can be formed into different shapes and structures according to different requirements, the sound emitting part can be adjusted according to different use requirements, and correspondingly, the position of the sound channel 1131 of the sound emitting part 113 can achieve a flexible and changeable effect.

The sound outlet hole 1133 is located at the middle of the outer side surface of the sound outlet portion 113 to be adapted to the device to which it is applied. The sound channel 1131 is close to the body 111 gradually in the direction of sound outlet 1133 to the intercommunicating pore 1111, also is close to the first shell bottom wall, thereby when making the sound production module 100 can be installed on a surface of the equipment as a whole, the sound outlet 1133 is just to the middle part in the equipment thickness direction, the structural installation is stable, and the sound effect is improved.

The utility model discloses still provide an electronic equipment (not shown), this electronic equipment includes as above arbitrary sound production module 100, this sound production module 100's concrete structure refers to above-mentioned embodiment, because this electronic equipment has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, no longer gives unnecessary details one by one here.

The electronic device comprises a device shell, wherein the sounding module 100 is accommodated in the device shell, the electronic device is further provided with a main control board, and the sounding units 30 in the sounding module 100 are electrically connected with the main control board through a circuit board.

The sound hole can be seted up to this equipment casing, and the sound outlet 1133 of sound production module 100 can correspond the setting with the sound hole, and the sound that sound production module 100 sent can be propagated to the external world by sound outlet 1133 and sound hole, supplies the user to receive.

The electronic device can further comprise a display screen and/or keys, the display screen and the keys are electrically connected with the main control board, and a user can realize function control of the sounding module 100 through the touch display screen and/or the keys.

The above is only the optional embodiment of the present invention, and not therefore the limit of the patent scope of the present invention, all of which are in the concept of the present invention, the equivalent structure transformation of the content of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. A sound generating module, comprising:

2. The acoustic module according to claim 1, wherein the inner housing is connected to a wall of the accommodating cavity, the magnetic circuit system has a first avoiding hole, the center of the annular diaphragm forms a second avoiding hole, the first avoiding hole and the second avoiding hole together form the via hole, and the extension housing is disposed on a side of the annular diaphragm away from the magnetic circuit system.

3. The acoustic module of claim 1, wherein the cross-section of the expansion cavity is rectangular, and the height of the expansion cavity in the axial direction of the via hole ranges from 0.8mm to 0.85 mm;

4. The sound generation module of claim 1, wherein at least one of the expansion cavity, the via hole, and the back cavity is impregnated with sound absorbing particles.

5. The sound generating module of claim 1, wherein the expansion shell is made of steel sheet or magnetic conductor;

and/or the expansion shell is bonded or welded with the annular diaphragm.

6. The acoustic module of claim 2, wherein the magnetic circuit system comprises a magnetic yoke, a central magnetic circuit and a side magnetic circuit disposed on the magnetic yoke, a magnetic gap is formed between the central magnetic circuit and the side magnetic circuit, the voice coil is suspended in the magnetic gap, the inner edge of the annular diaphragm is fixed to the central magnetic circuit, and the first avoiding hole penetrates through the magnetic yoke and the central magnetic circuit.

7. The acoustic module of claim 6, wherein the central magnetic circuit comprises a first central magnet, a central magnetic conductive plate and a second central magnet sequentially stacked on the magnetic yoke, the side magnetic circuit comprises a side magnet and a side magnetic conductive plate sequentially stacked on the magnetic yoke, and the inner edge of the annular diaphragm is fixed to the second central magnet.

8. The acoustic module of claim 1, wherein the ring-shaped diaphragm includes an edge diaphragm, a dome and a center diaphragm connected to each other, the dome is disposed between the edge diaphragm and the center diaphragm, an outer edge of the edge diaphragm is connected to the inner housing, an inner edge of the center diaphragm is connected to the magnetic circuit, and a corrugated rim of the center diaphragm is recessed in a direction away from the magnetic circuit;

9. The sound generating module as claimed in claim 1, wherein a sound outlet is further provided on the outer side of the first housing, and the sound outlet communicates with the sound outlet.

10. An electronic device comprising the sound emitting module according to any one of claims 1 to 9.