CN114630249A

CN114630249A - Sound production module and electronic equipment

Info

Publication number: CN114630249A
Application number: CN202210446114.3A
Authority: CN
Inventors: 于龙欣
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-06-14
Anticipated expiration: 2042-04-26
Also published as: CN114630249B

Abstract

The invention discloses a sounding module and electronic equipment, wherein the sounding module comprises a metal shell and a sounding monomer, 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 a containing cavity, and a sounding hole is formed in the cavity wall of the containing cavity; the sounding monomer comprises an inner shell and a vibration system, the inner shell is connected to the wall of the accommodating cavity, the vibration system comprises an annular vibrating diaphragm and a connecting shell, the connecting shell is fixed to the first shell, the outer periphery of the annular vibrating diaphragm is connected to the inner shell, and the inner periphery of the annular vibrating diaphragm is connected between the connecting shell vibration system and the first shell to form a front cavity; a closed cavity and an airflow channel for communicating the closed cavity with the front cavity are formed between the connecting shell and the first shell. The sounding module of the technical scheme of the invention can reduce the high-frequency peak value and effectively improve the high-frequency sound effect.

Description

Sound production module and electronic equipment

Technical Field

The invention relates to the technical field of electronic products, in particular to a sounding module and electronic equipment using the same.

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 general condition, the sound production monomer is located accommodation space, and the sound production monomer is for front chamber and back chamber with accommodation space separation, and the shell sets up the phonate hole in intercommunication front chamber, and the sound production monomer will be converted the signal of acoustic energy and carry out the sound production through the mode of vibration, and the sound wave is propagated in front chamber and back chamber to spread through the phonate hole, in order to send sound.

Along with the cell-phone is left for the space of vocal module and is littleer and littleer, in traditional speaker structure, set up central magnet and occupy the antechamber space and only be used for promoting the magnetic line value to do not make full use of this structure for the space of the performance promotion of vocal module is limited.

Disclosure of Invention

The invention mainly aims to provide a sounding module, aiming at reducing the high-frequency peak value of the sounding module and improving the tone quality of the sounding module.

In order to achieve the above object, the present invention provides a sound module, which includes:

the metal shell comprises a first shell and a second shell which are connected, the first shell and the second shell enclose to form a containing cavity, and a sound outlet hole is formed in the cavity wall of the containing cavity; and

the sound generating unit comprises an inner shell, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are fixed on the inner shell, the inner shell is connected to the cavity wall of the accommodating cavity, the vibration system comprises an annular vibrating diaphragm and a connecting shell, the connecting shell is fixed on the first shell, the outer periphery of the annular vibrating diaphragm is connected to the inner shell, the inner periphery of the annular vibrating diaphragm is connected to the connecting shell, a front cavity is formed between the vibration system and the first shell, and the sound outlet is communicated with the front cavity;

and a closed cavity and an airflow channel for communicating the closed cavity with the front cavity are formed between the connecting shell and the first shell.

Optionally, the vibration system further includes a voice coil, the voice coil is connected to the annular vibrating diaphragm, the voice coil is suspended in a magnetic gap of the magnetic circuit system, and projections of the voice coil, the sealed cavity and the annular vibrating diaphragm in a vibration direction of the vibration system do not overlap with each other;

the connection shell is further provided with an avoiding cavity, the avoiding cavity is arranged between the closed cavity and the annular vibrating diaphragm, and the avoiding cavity is correspondingly arranged with the voice coil.

Optionally, the connection shell includes central part and edge part, the edge part is located in the ring the central part periphery, the central part includes the diapire and locates the lateral wall of diapire periphery, the diapire, the lateral wall with first casing encloses and closes and form the airtight chamber, the edge part with form between the first casing the air current passageway.

Optionally, the edge portion includes a top wall disposed around the periphery of the side wall, and an extension wall extending from the periphery of the top wall in a bent manner, the top wall is connected to the first housing, the side wall, the top wall and the extension wall form the avoidance cavity therebetween, and the airflow channel is formed between the top wall and the first housing.

Optionally, a dimension of the airflow passage in a direction from the edge portion to the first housing is 0.08mm or more;

and/or a width dimension of the airflow passage in a circumferential direction of the connection housing is 0.08mm or more.

Optionally, an avoiding hole is formed in the position, corresponding to the top wall, of the first shell, a cover plate is arranged on one side, deviating from the containing cavity, of the first shell, the cover plate blocks the avoiding hole, and the cover plate and the top wall form the airflow channel.

Optionally, a partial region of the top wall is concavely provided with an avoiding groove towards a direction departing from the first shell, the groove wall of the avoiding groove and the first shell form the airflow channel therebetween, and the airflow channel penetrates through the side wall and the extending wall.

Optionally, the connecting shell is made of a magnetizer;

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

Optionally, the connecting shell abuts against a surface of the magnetic circuit system facing the first housing.

Optionally, the magnetic circuit system includes a magnetic yoke, the magnetic yoke connect in one side that the inner shell deviates from the annular vibrating diaphragm, still including locating magnetic yoke and spaced center magnetic circuit and limit magnetic circuit, form the magnetic gap between center magnetic circuit and the limit magnetic circuit, limit magnetic circuit be a plurality of and interval distribution in the periphery of center magnetic circuit, it is adjacent form between the limit magnetic circuit and dodge the space, connect the shell butt center magnetic circuit orientation the surface of first casing.

Optionally, the vibration system further includes a support, the support is disposed at an interval around the voice coil, and the support passes through the avoiding space and connects the annular diaphragm and the voice coil.

Optionally, the annular diaphragm includes looks spaced infolding ring and outer book ring, and connects infolding ring with the bulb top of outer book ring, the interior border of infolding ring connect in connect the shell, the outer border of outer book ring connect in the inner shell, the leg joint the bulb top with the voice coil loudspeaker voice coil.

Optionally, the support and the dome are of an integrally formed structure.

Optionally, the vibration system further includes a centering support, the centering support includes a first fixed end and a second fixed end connected to each other, the first fixed end is connected to the inner shell, and the second fixed end is connected to one end of the voice coil, which is far away from the annular diaphragm;

and/or, the vibration system still includes supplementary vibrating diaphragm, the outer peripheral edge of supplementary vibrating diaphragm is fixed in the inner shell, the inner peripheral edge connect in the voice coil loudspeaker voice coil is kept away from the one end of annular vibrating diaphragm.

The invention further provides electronic equipment which comprises the sounding module.

According to the technical scheme, the sounding module adopts the metal shell to contain the sounding monomer, so that the wall thickness of the shell of the sounding module can be reduced, and the heat dissipation performance of the module is enhanced. The sounding monomer comprises an inner shell, a vibration system and a magnetic circuit system, wherein the vibration system adopts an annular vibrating diaphragm and a connecting shell, the connecting shell is arranged in the annular vibrating diaphragm, and a closed cavity and an airflow channel for connecting the closed cavity and the front cavity are formed between the connecting shell and the metal shell. Adopt annular vibrating diaphragm, annular vibrating diaphragm central area leaves for magnetic circuit and the more design space of connecting the shell, can effectively reduce the height dimension of sound production module, is favorable to the slimming of sound production module. And the closed cavity is communicated with the front cavity through the airflow channel, and the natural frequency of the closed cavity is set to be the same as the high-frequency cut-off frequency of the sounding monomer, so that the high-frequency cut-off peak value is effectively reduced, the high-frequency peak value is reduced on the premise of not losing the volume of the rear cavity, the sharp voice can be effectively improved, and the better tone quality of the whole machine is obtained.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 an embodiment of a sound module according to the present invention;

FIG. 2 is an exploded view of the sound module of FIG. 1;

FIG. 3 is a cross-sectional view of another embodiment of the sound module of the present invention;

fig. 4 is an exploded view of the sound module shown in fig. 3.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Sound production module	337	Second center magnet
100a	Front cavity		339					Central magnetic conduction plate
				100b	Rear cavity		35		Vibration system
100c	Air flow channel	351	Vibrating diaphragm
				10	Metal shell	3511	Externally folded ring
11	First shell	3513	Inward folding ring
				111	Sound outlet hole	3513a	Mounting hole
113	Avoiding hole	353	Connecting shell
				13	Second shell	353a	Closed cavity
15	Cover plate	3531	Center part
				30	Sound monomer	3533	Edge part
31	Inner shell	3533a	Avoiding cavity
				33	Magnetic circuit system	3533b	Dodging groove
33a	Magnetic gap	355	Voice coil
				331	Magnetic conductive yoke	356	Receiving part
333	First central magnet	357	Ball top
				335	Edge magnet	358	Centering support plate
336	Edge magnetic conduction plate	359	Auxiliary vibrating diaphragm

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, 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 movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

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

The present invention provides a sound module 100.

Referring to fig. 1 and fig. 2, in an embodiment of the present invention, the sound module 100 includes a metal housing 10 and a sound unit 30, the metal housing 10 includes a first housing 11 and a second housing 13 connected to each other, the first housing 11 and the second housing 13 enclose to form an accommodating cavity, and a sound outlet 111 is formed in a cavity wall of the accommodating cavity; the sound generating unit 30 includes an inner shell 31, a vibration system 35 and a magnetic circuit system, the inner shell 31 is connected to the wall of the accommodating cavity, the vibration system 35 includes an annular diaphragm 351 and a connecting shell 353, the connecting shell 353 is fixed to the first shell 11, the outer periphery of the annular diaphragm 351 is connected to the inner shell 31, the inner periphery of the annular diaphragm 351 is connected to the connecting shell 353, and a front cavity 100a is formed between the vibration system 35 and the first shell 11;

a sealed cavity 353a and an air flow passage 100c communicating the sealed cavity 353a with the front cavity 100a are formed between the connection housing 353 and the first housing 11.

In this embodiment, the sound module 100 is used to provide an electroacoustic conversion function for an applied device, and includes a metal housing 10 to provide a mounting base and a protection base for the sound unit 30. The metal casing 10 includes a first case 11 and a second case 13 connected so as to facilitate assembly of the sound-generating unit 30. The two can be detachably connected, such as clamped or inserted, so that 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.

Use metal material as the shell, because the metal has the thin and big characteristic of intensity of wall, can make sound module 100 play good supporting effect under the thin condition of wall for this sound module 100's appearance is smaller and more exquisite, and improves inner space and reinforcing module heat dispersion. 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 a circle, a polygon, an irregular shape, etc., and the longitudinal sectional shape is a semicircle, a polygon, an irregular shape, etc., which is selected according to the use requirement and the shape of the sound generating 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 encloses to form an accommodating groove, and the two cooperate to form an accommodating cavity.

It can be understood that, sound production monomer 30 is located and is held the intracavity, and it includes inner shell 31, magnetic circuit 33 and vibration system 35, and inner shell 31 is connected with the chamber wall that holds the chamber to will hold the chamber and cut apart into front chamber 100a and back chamber 100b, and here, sound production monomer 30 encloses with first casing 11 and closes formation front chamber 100a, encloses with second casing 13 and closes formation back chamber 100b, establishes first casing 11 and has seted up sound outlet 111, thereby makes the air current flow out from sound outlet 111 through front chamber 100 a. Magnetic circuit 33 and vibration system 35 install respectively in the both sides face of the internal shell 31 body, and of course, the hole has been seted up at the middle part of internal shell 31, supplies vibration system 35 and magnetic circuit 33 to cooperate the installation, and magnetic circuit 33 drives vibration system 35 and realizes the vocal function.

Vibration system 35 includes annular diaphragm 351 and connects the shell 353, the outer peripheral edge of annular diaphragm 351 is connected at the surface of inner shell 31 towards first casing 11, vibration realization sound production about in preceding chamber 100a, mounting hole 3513a is seted up at the middle part of annular diaphragm 351, it connects shell 353 in this mounting hole 3513a department, the opening shape of here mounting hole 3513a matches with the cross sectional shape who connects shell 353, conveniently be connected with diaphragm 351 and form closed structure, keep apart preceding chamber 100a and back chamber 100 b. This connect shell 353's material can be the magnetizer, like iron, cobalt, nickel etc. has certain magnetic conduction effect, can play better magnetic conduction effect in magnetic field space, and structural strength can reduce its thickness high, guarantees the sealed chamber 353 a's that forms volume, also can reduce occupation space, improves space utilization, also is the same with magnetic circuit 33's material, material saving cost, conveniently processes. The connection housing 353 is fixed to the first housing to form a sealed cavity 353a, and is communicated with the front cavity 100a through the airflow channel 100c, and the function of the resonant cavity is realized by combining a structure of a cavity through one channel, and the resonant cavity is also called a resonance cavity and has a natural frequency, and when the resonant cavity is designed to be the same as the high-frequency cut-off frequency of the sound generating module 100, the double-peak value of the high frequency can be reduced, so that the airflow channel 100c here is in a pipe shape, such as a long strip shape or a column shape, and occupies a part of the connection housing 353 in the circumferential direction, and the whole opening of the sealed cavity 353a cannot be communicated with the front cavity 100 a.

The metal casing 10 of the sound module 100 according to the present invention includes a first casing 11 and a second casing 13, which enclose to form a receiving cavity for mounting the sound generating unit 30. By adopting the metal casing 10 to accommodate the sounding unit 30, the wall thickness of the sounding module 100 can be reduced, and the heat dissipation performance of the module can be enhanced. The sound generating unit 30 includes an inner casing 31, a vibration system 35 and a magnetic circuit system 33, the vibration system employs an annular diaphragm 351 and a connecting casing 353, the connecting casing 353 is disposed in the annular diaphragm 351, and a sealed cavity 353a and an air flow passage 100c connecting the sealed cavity 353a and the front cavity 100a are formed between the connecting casing 353 and the metal outer casing 10. Adopt annular vibrating diaphragm 351, the central zone of annular vibrating diaphragm 351 leaves more design spaces for magnetic circuit 33 and connecting shell 353, can effectively reduce sound module 100's height dimension, is favorable to sound module 100's slimming. And the sealed cavity 353a is communicated with the front cavity 100a through an air flow channel 100c, the sealed cavity 353a and the air flow channel 100c form a resonant cavity, the natural frequency of the resonant cavity is set to be the same as the high-frequency cut-off frequency of the sounding monomer 30, so that the high-frequency cut-off peak value is effectively reduced, the high-frequency peak value is reduced on the premise of not losing the volume of the rear cavity 100b, the sharp voice can be effectively improved, and the better tone quality of the whole machine is obtained.

In other embodiments, the sound outlet 111 may be formed by opening the second housing 13 or by matching the first housing 11 and the second housing 13 to form the sound outlet 111.

With reference to fig. 1 and 2, optionally, the vibration system 35 further includes a voice coil 355, the voice coil 355 is connected to the annular diaphragm 351, the voice coil 355 is suspended in the magnetic gap 33a of the magnetic circuit system 33, and projections of the voice coil 355, the sealed cavity 353a and the annular diaphragm 351 in the vibration direction of the vibration system 35 do not overlap each other;

the connection housing 353 further forms an escape cavity 3533a, the escape cavity 3533a is disposed between the sealed cavity 353a and the annular diaphragm 351, and the escape cavity 3533a is disposed corresponding to the voice coil 355.

It is understood that the voice coil 355 is located in the magnetic gap 33a of the magnetic circuit system 33, so as to drive the voice coil 355 by the magnetic circuit system 33, the voice coil 355 vibrates up and down and drives the annular diaphragm 351 to vibrate up and down, the connecting shell 353 is of a fixed structure, and in order to prevent interference, an escape cavity 3533a is formed at a position of the connecting shell 353 corresponding to the voice coil 355, of course, an opening of the escape cavity 3533a faces the voice coil 355, namely, faces the magnetic circuit system 33, so as to be opposite to an opening of the sealed cavity 353 a. Here, the opening size of the escape cavity 3533a is larger than the width of the voice coil 355, so that the voice coil 355 has a certain vibration space, interference is prevented, and a vibration effect is improved.

Meanwhile, the avoiding cavity 3533a is arranged between the sealed cavity 353a and the annular diaphragm 351, and the voice coil 355, the sealed cavity 353a and the annular diaphragm 351 do not overlap with each other in the projection in the vibration direction of the vibration system 35, so that the occupied space can be reduced in the height direction, the height of the sound production module 100 is further reduced, and the thinning is facilitated.

Optionally, the connection housing 353 includes a central portion 3531 and an edge portion 3533 annularly disposed on the periphery of the central portion 3531, the central portion includes a bottom wall and a side wall disposed on the periphery of the bottom wall, the bottom wall and the side wall and the first housing 11 enclose the sealed cavity 353a, and the edge portion 3533 and the first housing 11 form the airflow channel 100c therebetween.

The edge portion 3533 includes a top wall surrounding the periphery of the side wall, and an extension wall extending from the periphery of the top wall, the top wall is connected to the first housing 11, the side wall, the top wall and the extension wall form the bypass chamber 3533a therebetween, and the airflow channel 100c is formed between the top wall and the first housing 11.

In this embodiment, because the connection shell 353 is mainly formed by a magnetic conductor made of a metal material, the connection shell 353 can be processed in an integrated forming mode, that is, the metal plate is used for bending, the middle part of the metal plate is bent in a downward concave manner to form a bottom wall and a side wall connected with the periphery of the bottom wall, and then the edge position of the metal plate is bent outwards by 90 degrees, so that an edge part 3533 is formed, that is, the longitudinal section of the edge part 3533 is u-shaped, so that the processing is facilitated on the one hand, the production efficiency is improved, on the other hand, the structural strength can be improved, the thickness of the connection shell 353 can be reduced, and the occupation of space is reduced. Of course, in other embodiments, a metal block process may be used to cut a groove in the middle to form the sealed cavity 353a and cut a groove in the edge to form the oppositely opened relief cavity 3533 a.

Here, the air flow passage 100c is formed by the edge portion 3533, specifically, formed in cooperation with the first housing 11, so that the division of the front chamber 100a and the rear chamber 100b is not affected while the resonant chamber is formed. Of course, in other embodiments, the airflow channel 100c may be formed by the connecting duct formed by the opening of the edge portion 3533.

Optionally, the size of the airflow channel 100c in the direction from the edge portion 3533 to the first housing 11 is greater than or equal to 0.08 mm;

and/or, a width dimension of the air flow passage 100c in the circumferential direction of the connection housing 353 is 0.08mm or more.

Here, the size of the air flow channel 100c should not be too large, otherwise, a duct structure of the resonant cavity cannot be formed, and the maximum size of the air flow channel on the connecting shell 353 is specifically determined according to the overall size of the sound module 100; certainly, the size of the airflow channel 100c is not suitable to be too small, otherwise the flow effect is not good, and the resonance effect is not obvious, so that the height size range of the airflow channel 100c in the direction from the edge portion 3533 to the first housing 11 is greater than or equal to 0.08mm, for example, 0.08mm, 0.1mm, 0.12mm, and the like, the resonance effect can be effectively ensured, the high-frequency cut-off peak value is reduced, and the sound effect is improved. Similarly, the width of the air flow path 100c in the circumferential direction of the connecting housing 353 is equal to or greater than 0.08mm, for example, 0.08mm, 0.1mm, 0.12mm, or the like, depending on the presence or absence of the above-described dimension, and the resonance effect can be improved. Of course, the airflow path 100c is provided to penetrate in the width direction of the edge portion 3533, thereby ensuring communication between the front chamber 100a and the sealed chamber 353 a.

With reference to fig. 1 and fig. 2, optionally, an avoiding hole 113 is formed in a position of the first housing 11 corresponding to the top wall, a cover plate 15 is connected to a side of the first housing 11 away from the accommodating cavity, the cover plate 15 blocks the avoiding hole 113, and the airflow channel 100c is formed between the cover plate 15 and the top wall.

In this embodiment, the top wall of the edge portion 3533 abuts against the inner wall surface of the first housing 11, and the top wall and the inner wall surface can be in clearance fit, so as to reserve a certain processing tolerance space, thereby avoiding interference when the first housing 11 is assembled, and improving the yield of products. Offer first casing 11 and dodge hole 113, the roof is all in this dodge hole 113 at the projection of first casing 11 to set up apron 15 in dodging hole 113 department, apron 15 connects at first casing 11's surface, thereby makes to form airflow channel 100c between the roof of apron 15 and edge portion 3533 through the space of dodging hole 113, realizes the setting of resonant cavity. Here, the connection manner of the cover plate 15 and the first housing 11 may be rotation connection, adhesion, welding, or the like, and is not limited herein, and it is sufficient to ensure that the cover plate covers the avoiding hole 113 to form a sealing structure. The material of the cover plate 15 may be plastic, silicon gel, etc., such as polyethylene terephthalate (PET), etc., but is not limited thereto.

In other embodiments, when the sound module 100 is applied to a device, the device housing and the opening cooperate to form a sealing structure, so that the structure of the cover plate 15 can be omitted.

Referring to fig. 3 and 4, in an alternative embodiment, an avoiding groove 3533b is concavely formed in a partial region of the top wall in a direction away from the first housing 11, the airflow channel 100c is formed between a groove wall of the avoiding groove 3533b and the first housing 11, and the airflow channel 100c penetrates through the side wall and the extending wall.

In this embodiment, the connection housing 353 is provided with the avoiding groove 3533b, and the avoiding groove 3533b is formed by the top wall of the edge portion 3533 being recessed toward the direction away from the first housing 11, so that the airflow channel 100c is formed between the groove wall of the avoiding groove 3533b and the inner wall surface of the first housing 11.

Optionally, the connection shell 353 and the diaphragm 351 are connected by bonding or welding.

In this embodiment, when the connecting shell 353 is made of metal, the connecting shell 353 and the diaphragm 351 may be bonded or welded in a connecting manner, which is high in connection strength and stable in connection structure, so that the overall structural stability of the product can be improved.

In addition, in order to improve the resonance effect, the resonant cavity may be provided with a plurality of cavities, that is, the sealed cavity 352a is provided with a plurality of air flow channels 100c, and the air flow channel 100c is communicated with the sealed cavity 352a, so as to further reduce the high-frequency cut-off peak value, thereby improving the high-frequency sharp problem and improving the sound effect.

Alternatively, the connection housing 353 abuts a surface of the magnetic circuit system facing the first housing 11.

In order to secure the mounting stability of the connection case 353, the outer surface of the center portion 3531 of the connection case 353 abuts on the upper surface of the magnetic circuit system 33, that is, the surface facing the first housing 11, thereby making it possible to connect the connection case 353 more stably. Here, the connecting shell 353 may have no connection relationship with the magnetic circuit system 33, and may be bonded or welded, which is not limited herein.

With reference to fig. 1 and fig. 2, optionally, the magnetic circuit system 33 includes a magnetic yoke 331, and a central magnetic circuit and a side magnetic circuit that are disposed on the magnetic yoke 331 and spaced apart from each other, the magnetic yoke 331 is connected to a side of the inner shell 31 facing away from the annular diaphragm 351, a magnetic gap 33a is formed between the central magnetic circuit and the side magnetic circuit, the side magnetic circuits are distributed at intervals on the periphery of the central magnetic circuit, an avoiding space is formed between adjacent side magnetic circuits, and the connecting shell 353 abuts against the surface of the central magnetic circuit facing the first housing 11.

It can be understood that the magnetic circuit system 33 includes a magnetic yoke 331, a central magnetic circuit and a side magnetic circuit disposed on the magnetic yoke 331, the magnetic yoke 331 is connected with the inner shell 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 adhesion, clamping or insertion, which is not limited herein. A magnetic gap 33a is formed between the central magnetic circuit and the side magnetic circuit, the voice coil 355 is inserted into the magnetic gap 33a, and after the voice coil 355 is energized, the magnetic circuit 33 generates a magnetic field to drive the voice coil 355 to reciprocate up and down in the magnetic gap 33a, so as to drive the diaphragm 351 to move and transmit a sound signal from the sound outlet hole 111. The outer surface of the center portion 3531 of the connection case 353 abuts on the upper surface of the central magnetic circuit, thereby further stabilizing the connection case 353 in connection. And the side magnetic circuit is provided with an avoidance space, so that more space can be provided for the vibration of the voice coil 355, the height size of the sounding module 100 is effectively reduced, and the thinning of the sounding module 100 is facilitated.

Specifically, the surface area of the central portion 3531 is smaller than or equal to the surface area of the central magnetic circuit, and the shape of the central portion 3531 is the same as or similar to the shape of the central magnetic circuit, so that the voice coil 355 can be prevented from being affected and the entire volume of the sound module 100 can be reduced on the basis of achieving good structural stability and resonant cavity function.

In order to enhance the magnetic field of the magnetic circuit system 33, the magnetic circuit system 33 further includes a first center magnet 333, a center magnetic conductive plate 339 and a second center magnet 337, wherein the center magnetic conductive plate 339 is disposed on a surface of the first center magnet 333 facing away from the magnetic conductive yoke 331, so as to enhance the magnetic field effect of the first center magnet 333333 and prevent magnetic lines of force from leaking; second center magnet 337 locates the surface of center magnetic conduction board 339, can further increase magnetic field intensity to promote magnetic field drive power, guarantee the vibrating diaphragm 351 vibration performance of sound production module 100. The resonant cavity which is formed by combining the connecting shell 353 and is communicated with the front cavity 100a can improve the peak value of high-frequency cut-off frequency and effectively improve the sound effect while improving the magnetic field intensity.

Of course, in order to further enhance the magnetic field effect, on the basis of the central magnetic circuit, the side magnetic circuit also includes the side magnet 335 and the side magnetic conductive plate 336, and the side magnetic conductive plate 336 is disposed on the surface of the side magnet 335 away from the magnetic yoke 331, so that the magnetic field strength of the side magnet 335 can be enhanced, and the leakage of the magnetic field lines can be reduced.

Optionally, the vibration system further includes a bracket 356, the bracket 356 is spaced apart from the periphery of the voice coil 355, and the bracket 356 passes through the avoiding space and connects the ring-shaped diaphragm 3511 and the voice coil 355.

Here, one end of the support 356 is connected to the ring-shaped diaphragm 351, and the other end is connected to the voice coil 355, so that vibration transmission between the voice coil 355 and the ring-shaped diaphragm 351 is realized, the stability of connection to the voice coil 355 is effectively improved, and uniform driving force can be provided.

Referring to fig. 1 and 2 again, optionally, the ring diaphragm 351 includes an outer folded ring 3511 and an inner folded ring 3513 spaced apart from each other, and a dome 357 connecting the outer folded ring 3511 and the inner folded ring 3513, an inner edge of the inner folded ring 3513 is connected to the connecting shell 353, an outer edge of the outer folded ring 3511 is connected to the inner shell 31, and the support 356 connects the voice coil 355 and the dome 357.

In this embodiment, in order to improve the vibration stability of the annular diaphragm 351, the vibration system 35 further includes a spherical top 357, the spherical top 357 is annular, the material of the spherical top 357 is harder than that of the annular diaphragm 351, the ductility is better, the annular diaphragm 351 is prevented from deviating from the vibration in the vibration direction, and therefore the effect and the sound production performance during the high-frequency vibration are improved. Meanwhile, because two central magnets are arranged in the magnetic circuit system 33, the height of the middle structure is high, the second central magnet 337 occupies the space of the original front cavity 100a, in order to reduce the interference between the diaphragm 351 and the magnets, the diaphragm 351 is divided into an outer folded ring 3511 and an inner folded ring 3513, the outer periphery of the outer folded ring 3511 is fixed on the inner shell 31, the inner periphery of the outer folded ring 3511 is connected with the inner folded ring 3513 through a spherical top 357, the inner folded ring 3513 is provided with a mounting hole 3513a, the connecting shell 353 is mounted on the inner periphery of the inner folded ring 3513, the folded ring of the inner folded ring 3513 faces the square recess deviating from the magnetic circuit system 33, the vibration direction of the inner folded ring 3513 is adjusted, and the interference with the central magnetic circuit is avoided. Here, the outer edge of the inner edge ring 3513 vibrates, and the inner edge does not vibrate, so that on the basis of ensuring the stable vibration of the outer edge ring 3511, a partial vibration effect can be realized, the sealing between the diaphragm 351 and the connecting shell 353 is ensured, and the front cavity 100a and the rear cavity 100b are effectively isolated. Here, the outer circumference of the external folding ring 3511 may be perpendicularly folded outward to form a hem covering the circumference of the inner shell 31, so that a more stable coupling structure can be formed.

The dome 357 plays a role of connecting the outward-folded ring 3511 and the inward-folded ring 3513, thereby achieving effective stable vibration of the diaphragm 351. The support 356 is connected to the inner periphery of the dome 357, and extends into the magnetic gap 33a toward one side of the magnetic circuit system 33, so that the longitudinal section of the support 356 is stepped, and the voice coil 355 is mounted on the surface of the support 356 facing the connecting case 353, so that the voice coil 355 faces the opening of the escape cavity 3533a, and when the voice coil 355 vibrates up and down, there is enough space to effectively avoid interference, and meanwhile, stable connection of the voice coil 355 can be realized. Specifically, the support 356 may be provided with a plurality of, for example, four, supports 356 connected to the inner periphery of the dome 357 at intervals, so that the material and weight may be reduced while ensuring stable support. Meanwhile, the optional bracket 356 and the dome 357 are integrally formed, so that the structural strength of the dome 357 and the supporting strength of the voice coil 355 are further improved, and the stability of the vibration system 35 is ensured.

Of course, in other embodiments, the support 356 has a smaller vertical extension, and the voice coil 355 may be disposed on the side of the support 356 away from the connecting housing 353.

In order to further improve the connection stability, the extension wall of the edge portion 3533 is bent outward to form a folded edge, and the folded edge is parallel to the bottom wall, and is connected with the opening edge of the inward-folded ring 3513 through the folded edge, for example, bonding or welding, so that the contact area can be increased, and the connection stability is ensured. The border butt edge portion 3533's of infolding ring 3513 surface to can play better positioning action, make things convenient for the equipment more. The connection housing 353 has an integrally formed structure, so that the structural strength thereof can be ensured.

In addition, the concave direction of the outward folded ring 3511 faces the magnetic circuit system 33, so that the structure can be simplified and stable vibration can be realized. Of course, if necessary, the folding ring of the outward folding ring 3511 may be recessed in a direction away from the magnetic circuit system 33.

Optionally, a via hole is formed in the bottom surface of the magnetic yoke 331 to communicate with the rear cavity 100b, so as to implement airflow propagation. And the sound generating unit 30 further comprises a protective net, the protective net covers the through hole and allows air flow to enter and exit, so that the internal and external air pressures of the sound generating unit 30 are balanced, the sound absorbing particles can be hermetically filled, and the sound absorbing particles in the rear cavity 100b are prevented from entering the sound generating unit 30. The material of the protective net may be metal or mesh cloth, and is not limited herein.

With reference to fig. 2, optionally, the vibration system 35 further includes a centering pad 358, where the centering pad 358 includes a first fixed end and a second fixed end connected to each other, the first fixed end is connected to the inner casing 31, and the second fixed end is connected to an end of the voice coil 355 away from the annular diaphragm 351;

and/or, the vibration system 35 further includes an auxiliary diaphragm 359, an outer periphery of the auxiliary diaphragm 359 is fixed to the inner casing 31, and an inner periphery is connected to an end of the voice coil 355 away from the ring-shaped diaphragm 351.

On the basis of the above structure, in order to better ensure the vertical movement of the voice coil 355, the vibration system 35 further includes four centering supports 358, the four centering supports 358 are respectively located at four corners of the voice coil 355, the first fixed end of each centering support is connected with the voice coil 355 or the ball top 357, the second fixed end of each centering support is connected with the inner shell 31 or the magnetic yoke 331, so that the voice coil 355 is ensured to vibrate in the vertical direction, the vibration stability of the voice coil 355 is improved, and the acoustic effect is ensured. Here, the centering pad 358 has a planar structure, so as to occupy no space and reduce the overall volume of the sound module 100.

On the basis of the structure with the centering branch 358, the vibration system 35 further includes an auxiliary vibration diaphragm 359, an inner circumference of the auxiliary vibration diaphragm 359 is fixed at the first fixed end of the centering branch 358, and an outer circumference is fixed at the second fixed end of the centering branch 358, so that under the vibration of the outward folded ring 3511, the vibration of the auxiliary vibration diaphragm is assisted to improve the vibration stability.

Of course, in the absence of centering pad 358, auxiliary diaphragm 359 is fixed to inner housing 31 at its outer periphery and at its inner periphery to the end of voice coil 355 remote from diaphragm 351.

The present invention further provides an electronic device (not shown), which includes any of the above-mentioned sound module 100, and the specific structure of the sound module 100 refers to the above-mentioned embodiments, and since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, the electronic device at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and details are not repeated herein.

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 111 of sound production module 100 can correspond with the sound hole and set up, and the sound that sound production module 100 sent can be propagated to the external world by sound outlet 111 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 description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a sound production module which characterized in that, sound production module includes:

2. The acoustic module according to claim 1, wherein the vibration system further includes a voice coil, the voice coil is connected to the ring-shaped diaphragm, the voice coil is suspended in a magnetic gap of the magnetic circuit system, and projections of the voice coil, the sealed cavity and the ring-shaped diaphragm in a vibration direction of the vibration system do not overlap with each other;

3. The acoustic module of claim 2, wherein the connecting housing includes a central portion and an edge portion, the edge portion is disposed around a periphery of the central portion, the central portion includes a bottom wall and a sidewall disposed around a periphery of the bottom wall, the sidewall and the first housing enclose the sealed cavity, and the air flow channel is formed between the edge portion and the first housing.

4. The acoustic module of claim 3, wherein the edge portion includes a top wall surrounding the periphery of the side wall, and an extension wall extending from the periphery of the top wall, the top wall being connected to the first housing, the side wall, the top wall and the extension wall forming the bypass chamber therebetween, and the airflow channel being formed between the top wall and the first housing.

5. The sound generating module of claim 4, wherein the dimension of the air flow channel in the direction from the rim portion to the first housing is 0.08mm or greater;

6. The acoustic module according to claim 4, wherein an avoiding hole is formed in a position of the first housing corresponding to the top wall, a cover plate is disposed on a side of the first housing facing away from the accommodating cavity, the cover plate blocks the avoiding hole, and the airflow channel is formed between the cover plate and the top wall.

7. The acoustic module of claim 4, wherein a partial area of the top wall is recessed toward a direction away from the first housing to form an avoiding groove, the wall of the avoiding groove and the first housing form the airflow channel therebetween, and the airflow channel penetrates through the side wall and the extension wall.

8. The acoustic module of claim 1, wherein the connecting shell is a magnetizer; and/or the connecting shell is bonded or welded with the inner periphery of the annular diaphragm.

9. The sound generation module of any one of claims 1 to 8, wherein the connection housing abuts a surface of the magnetic circuit system facing the first housing.

10. The sounding module according to any one of claims 2 to 7, wherein the magnetic circuit system includes a magnetic yoke connected to a side of the inner housing facing away from the annular diaphragm, and further includes a central magnetic circuit and a side magnetic circuit disposed on the magnetic yoke and spaced apart from each other, a magnetic gap is formed between the central magnetic circuit and the side magnetic circuit, the side magnetic circuits are plural and spaced apart from each other and distributed on a periphery of the central magnetic circuit, an avoiding space is formed between adjacent side magnetic circuits, and the connecting housing abuts against a surface of the central magnetic circuit facing the first housing.

11. The acoustic module of claim 10 wherein the vibration system further comprises a support spaced around the periphery of the voice coil, the support passing through the relief space and connecting the annular diaphragm and the voice coil.

12. The acoustic module of claim 11, wherein the ring-shaped diaphragm comprises an inward-folded ring and an outward-folded ring which are spaced apart, and a dome connecting the inward-folded ring and the outward-folded ring, wherein an inner edge of the inward-folded ring is connected to the connecting shell, an outer edge of the outward-folded ring is connected to the inner shell, and the support is connected to the dome and the voice coil.

13. The sound emitting module of claim 12, wherein the cradle and the dome are of an integrally formed construction.

14. The sound production module of any one of claims 2 to 7, wherein the vibration system further comprises a damper, the damper comprising a first fixed end and a second fixed end connected to each other, the first fixed end being connected to the inner housing, and the second fixed end being connected to an end of the voice coil away from the annular diaphragm;

and/or, the vibration system further comprises an auxiliary diaphragm, the outer periphery of the auxiliary diaphragm is fixed on the inner shell, and the inner periphery of the auxiliary diaphragm is connected to one end, away from the annular diaphragm, of the voice coil.

15. An electronic device comprising the sound emitting module according to any one of claims 1 to 14.