CN214756892U

CN214756892U - Sound production device and electronic equipment

Info

Publication number: CN214756892U
Application number: CN202121317182.7U
Authority: CN
Inventors: 陈阿亮; 申兆垒; 陈国强
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-11-16
Anticipated expiration: 2031-06-10
Also published as: WO2022257739A1

Abstract

The utility model discloses a sounding device and an electronic device, wherein the sounding device comprises a shell, a sounding monomer, a protection piece and sound-absorbing particles, and the shell forms an accommodating cavity; the sound generating single body is arranged in the accommodating cavity and forms a rear sound cavity with the shell in an enclosing manner, and the sound generating single body is provided with a sound release hole; the protection piece is made of a metal plate, is arranged in the rear sound cavity, is hermetically fixed on the sound generating unit and covers the sound leakage hole, the protection piece, the sound generating unit and the shell are enclosed together to form a filling cavity, and the protection piece is provided with a plurality of micropores communicated with the sound leakage hole; the protective piece comprises a bottom wall and a side wall, the side wall is connected to the periphery of the sounding monomer, a filling hole is formed in the side wall, and the hole wall of the filling hole and the sounding monomer are enclosed to form a glue containing groove; the sound-absorbing particles are filled in the filling cavity. The utility model discloses technical scheme's sounding device can improve sounding device's filling utilization ratio and equipment convenience.

Description

Sound production device and electronic equipment

Technical Field

The utility model relates to an acoustoelectric conversion technical field, in particular to sound production device and electronic equipment.

Background

A sound-generating device is an important acoustic component in electronic equipment, which is a transducer device that converts an electrical signal into an acoustic signal. With the rapid development of electronic devices, higher requirements are put forward on the performance of sound production devices. At present, the equivalent volume of the audio rear cavity can be improved by a filling technology, but the available physical space of the existing sound production device is not fully used for filling sound absorption particles, so that space waste is caused; and the assembly of the guard in the full-fill technique is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sounding device aims at improving sounding device's filling utilization ratio and equipment convenience.

In order to achieve the above object, the present invention provides a sound generating device comprising:

a housing forming a receiving cavity;

the sound generating unit is arranged in the accommodating cavity, a rear sound cavity is formed by enclosing the sound generating unit and the shell, and a sound release hole is formed in the sound generating unit;

the protection piece is made of metal sheet materials, is arranged in the rear sound cavity, is fixed on the sounding single body and covers the sound leakage hole, and is enclosed by the protection piece, the sounding single body and the shell to form a filling cavity; the protection piece comprises a bottom wall and a side wall bent and extended from the periphery of the bottom wall, the side wall is connected to the periphery of the sounding monomer, a filling hole is formed in the side wall, and the hole wall of the filling hole and the sounding monomer are enclosed to form a glue containing groove; and

the sound-absorbing particles are filled in the filling cavity.

In an alternative embodiment, the filling hole extends towards and through the edge of the side wall, the filling hole extends to the bottom wall, and the filling hole comprises a first portion located at the side wall and a second portion located at the bottom wall.

In an optional embodiment, the housing comprises an upper shell and a lower shell, and the upper shell and the lower shell are connected and enclose to form the accommodating cavity;

the sound generating unit is arranged in the accommodating cavity and is hermetically fixed on the upper shell, the sound generating unit comprises a vibrating diaphragm, and the vibrating diaphragm and the upper shell are arranged at intervals and enclose to form a front sound cavity;

the protection piece, the sounding unit, the lower shell and the upper shell jointly enclose to form the filling cavity.

In an alternative embodiment, the thickness of the guard is 0.15mm or less.

In an optional embodiment, the sound generating unit includes a single casing and a magnetic yoke connected to a periphery of the single casing, the sound leaking hole is formed between the single casing and the magnetic yoke, the bottom wall is attached to the magnetic yoke, the side wall is connected to the magnetic yoke and/or the single casing, the side wall covers the sound leaking hole, and the plurality of micro holes include a plurality of second micro holes arranged on the side wall corresponding to positions of the sound leaking hole.

In an optional embodiment, the bottom wall covers the sound leakage hole, the plurality of micro holes include a plurality of first micro holes opened on the bottom wall, and an axis of the first micro hole is parallel to a vibration direction of the diaphragm.

In an alternative embodiment, the single shell is provided with a support part corresponding to the sound leakage hole, and the part of the side wall corresponding to the sound leakage hole is lapped on the support part to form an isolation structure.

In an optional embodiment, an avoiding hole is formed in the middle of the bottom wall, and the magnetic guide yoke and the hole wall of the avoiding hole enclose a containing groove for containing part of the sound-absorbing particles.

In an alternative embodiment, the shape of the micropores is circular, and the diameter range of the micropores is greater than 0 and less than or equal to 0.15 mm;

the micropores are micropores formed by punching or etching.

In an optional embodiment, the magnetic yoke includes a body and a blocking wall bent and extended from the body, the side wall is provided with a blocking hole, the blocking wall is blocked in the blocking hole, the blocking hole extends towards the edges of the bottom wall and the side wall respectively, a blocking hook extends from a hole wall of the blocking hole at the bottom wall, and the blocking hook is blocked on the outer surface of the blocking wall.

In an optional embodiment, the upper casing includes a bottom and a connecting portion connected to a periphery of the bottom, the connecting portion is connected to the lower casing in a sealing manner, a bearing portion is convexly arranged at the bottom, the sounding monomer is fixed to the bearing portion in a sealing manner and is arranged at an interval with the bottom, a sounding channel is formed in the connecting portion, and the sounding channel is communicated with the front sounding cavity.

The utility model also provides an electronic equipment, which comprises an outer shell, the shell is inside to have the holding chamber, still includes as above arbitrary sound production device, sound production device installs the holding intracavity.

The utility model discloses technical scheme's vocal device includes casing, sound production monomer, protection piece and inhales the sound granule, and the casing is formed with the free chamber that holds of sound production, provides the protection. This sound production monomer is formed with the back sound chamber with the casing, and self has seted up and has let out the sound hole, set up a protection piece in the back sound chamber, it is fixed in the sound production monomer and covers and let out the sound hole, the protection piece has seted up the micropore that a plurality of intercommunications let out the sound hole, under the condition that does not influence the sound wave conveying, keep apart into the filling chamber that can carry out filling completely with the back sound chamber, this filling chamber can be filled with and inhale the sound granule, effectively utilize all spaces that can utilize in back sound chamber, the filling volume has been increased, the acoustic performance of vocal ware has been improved. Meanwhile, the protection part is made of metal plates, so that on one hand, the structural strength is ensured, meanwhile, the thickness is smaller, and the volume of the filling cavity can be further increased; on the other hand, the deformation is not easy to occur randomly, and the convenience of assembly can be improved; and offer the filling hole at the lateral wall, enclose with the sound production monomer and close and form and hold gluey groove, cover the protection part behind the sound production monomer, can hold gluey inslot with glue filling for the connection of protection part is convenient more stable.

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 front view of an embodiment of the sound device of the present invention;

FIG. 2 is a top view of the sound device of FIG. 1;

FIG. 3 is a bottom view of the sound device of FIG. 1;

FIG. 4 is a cross-sectional view of the sound device of FIG. 3 taken along line A-A;

FIG. 5 is an exploded view of the sound device of FIG. 1;

FIG. 6 is a schematic view of the structure of the shielding member and the sounding unit in the sounding device shown in FIG. 1;

fig. 7 is a longitudinal sectional view of the guard and the sound generating unit shown in fig. 6;

FIG. 8 is a schematic view of the sound device of FIG. 1 showing the structure of the guard;

fig. 9 is a schematic structural view of a sounding unit in the sounding device shown in fig. 1.

The reference numbers illustrate:

100	sound production device	331	Support part
				100a	Front acoustic cavity	34	Side magnetic circuit part
100b	Rear acoustic cavity	35	Magnetic conductive yoke
				10	Shell body	351	Body
11	Upper casing	353	Retaining wall
				111	Bottom part	37	Central magnetic circuit part
1111	Assembly hole	50	Protective element
				113	Connecting part	51	Bottom wall
1131	Sound channel	511	First micro-hole
				115	Bearing part	513	Avoiding hole
117	Metal sheet	53	Side wall
				13	Lower casing	531	Second micro-hole
30	Sound monomer	533	Filling the hole
				30a	Sound release hole	535	Clamping hole
31	Vibrating diaphragm	55	Clamping hook
				32	Voice coil	70	Sound-absorbing particles
33	Monomer shell	90	Flexible circuit board

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.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to 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, 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 sounding device 100.

Referring to fig. 1, 4, 5 and 7, in an embodiment of the present invention, the sound generating device 100 includes a housing 10, a sound generating unit 30, a protection member 50 and sound absorbing particles 70, the housing forming a receiving cavity; the sound generating unit 30 is arranged in the accommodating cavity, the sound generating unit 30 and the shell 10 are enclosed to form a rear sound cavity 100b, and a sound release hole 30a is formed in the sound generating unit 30;

the protection piece 50 is a metal plate, the protection piece 50 is disposed in the rear sound cavity 100b, and is fixed on the sound generating unit 30 and covers the sound leakage hole 30a, the protection piece 50, the sound generating unit 30 and the housing 10 together enclose to form a filling cavity, the protection piece 50 is provided with a plurality of micropores, and the micropores are communicated with the sound leakage hole 30 a; the sound-absorbing particles 70 are filled in the filling cavity.

It can be known, the sound production monomer 30 includes parts such as supporting component, vibration system and magnetic circuit, and wherein, vibration system includes vibrating diaphragm 31, and supporting component includes monomer casing 33 and locates the magnetic conduction board of the inward flange of monomer casing 33, and magnetic circuit includes magnetic yoke 35 and locates central magnetic circuit portion 37 and limit magnetic circuit portion 34 on magnetic yoke 35, and monomer casing 33 extends along the outer border of magnetic yoke 35 and is the ring-type to connect magnetic yoke 35 and vibrating diaphragm 31 respectively. Here, the annular monomer housing 33 may be a closed annular structure or an open annular structure. The side magnetic path portions 34 are spaced around the periphery of the central magnetic path portion 37, the gap between the side magnetic path portions 34 and the central magnetic path portion 37 forms a magnetic gap, and the single case 33, the magnetic conductive yoke 35 and the side magnetic path portions 34 are collectively surrounded to form a structure that is open toward the diaphragm 31. The vibration system further comprises a voice coil 32, one end of the voice coil 32 is fixed on the vibrating diaphragm 31, the other end of the voice coil extends into the magnetic gap, and after alternating current is introduced into the voice coil, the voice coil can move up and down under the action of the magnetic field under stress, so that the vibrating diaphragm 31 is driven to vibrate, and the sound production function is achieved.

In this embodiment, the sound generating device 100 further includes a housing 10, and the housing 10 is formed with a receiving cavity, and the sound generating unit 30 can be installed therein, so as to protect and provide a filling space. A rear sound cavity 100b is formed between the sound generating unit 30 and the housing 10, and the sound generating unit 30 is formed with a sound leakage hole 30a communicating with the rear sound cavity 100b, a guard 50 is installed in the rear sound cavity 100b, the guard 50 is connected to the sound generating unit 30 and covers the sound leakage hole 30a, thereby sealing and protecting the sound generating unit 30 and preventing the sound absorbing particles 70 from entering the sound generating system. The guard 50 and the sounding unit 30 may be connected by bonding, so that the guard can be connected with the sounding unit and can have a sealing effect. Of course, the connection mode of the two can also be clamping connection or welding connection. The guard 50 is formed with a plurality of fine holes communicating with the sound leakage hole 30a, so that the sound waves of the sounding unit 30 are not prevented from being transmitted to the rear sound cavity 100 b. Here, the plurality of micropores may be collectively distributed at a certain position or certain several positions of the protection member 50, for example, an edge position or a four-corner position of the protection member 50, or the like. The protection member 50, the casing 10 and the sounding unit 30 are enclosed to form a filling cavity, and the filling cavity is filled with sound-absorbing particles 70, wherein the sound-absorbing particles 70 may be zeolite, activated carbon, or the like, and can absorb or desorb gas, thereby achieving an effect of equivalently expanding volume and improving acoustic effect.

Of course, in order to realize the filling of the sound-absorbing particles 70, a filling hole is further opened on the housing 10, the filling hole is communicated with the filling cavity, and the filling hole is equipped with a filling cover plate, and after the filling is completed, the filling hole can be effectively sealed through the filling cover plate.

In order to further reduce the space occupied by the rear acoustic cavity 100b, the shielding member 50 is made of a metal plate, which may be, but not limited to, iron, nickel, iron-nickel alloy, steel, etc. The protective element 50 of the metal plate can be thinner in size, so that the volume of the filling cavity can be increased, the filling space can be maximized, and better acoustic performance can be realized; on the other hand, the thin size is not easy to deform, the structural stability is good, the sound generating unit 30 can be conveniently positioned and assembled, and the assembly convenience is improved.

Referring to fig. 6 to 8, the protection component 50 includes a bottom wall 51 and a side wall 53 extending from the periphery of the bottom wall 51 in a bending manner, the side wall 53 is connected to the periphery of the sound generating unit 30, the side wall 53 is provided with a filling hole 533, and the hole wall of the filling hole 533 and the sound generating unit 30 form a glue accommodating groove in a surrounding manner.

Here, the shielding member 50 includes a bottom wall 51 and a side wall 53, the bottom wall 51 abuts against the outer surface of the yoke 35, and the side wall 53 covers the yoke 35 at the connection position with the cell housing 33. Specifically, the bottom wall 51 and the side wall 53 are integrally formed, so that the structural strength is high, and the service life of the protection member 50 can be effectively ensured. In the protector 50 of the integrated metal plate structure, the side wall 53 is formed by bending and extending the bottom wall 51, the bottom wall 51 covers the surface of the magnetic yoke 35, and the side wall 53 is bent and fastened toward the direction of the joint of the magnetic yoke 35 and the cell case 33, so that the assembly of the protector 50 can be realized.

Of course, in order to improve the connection stability, the sidewall 53 is opened with a filling hole 533, and the filling hole 533 is rectangular and penetrates the surface of the sidewall 53 to expose the sound generating unit 30, which is the side magnetic path portion 34. Therefore, the hole walls of the sound generating unit 30 and the filling hole 533 can form a glue containing groove, and when the protection member 50 is connected with the sound generating unit 30 in a sealing manner, the glue can be contained, so that a connection structure with a larger area is realized, and the stability of the connection between the protection member 50 and the sound generating unit 30 is ensured.

Optionally, a plurality of filling holes 533 are formed in the annular sidewall 53, and the plurality of filling holes 533 are uniformly distributed or symmetrically distributed on the sidewall 53. Here, two filling holes 533 are provided at both side edges of the side wall 53 in the length direction, respectively, so that the connection stability of the protection member 50 at each position is secured.

The utility model discloses technical scheme's vocal device 100 includes casing 10, sound production monomer 30, guard 50 and inhales sound granule 70, and casing 10 is formed with the chamber that holds sound production monomer 30, provides the protection. This sound production monomer 30 and casing 10 are formed with back sound cavity 100b, and itself has seted up and has let out sound hole 30a, set up a guard 50 in back sound cavity 100b, it is fixed in sound production monomer 30 and covers let out sound hole 30a, guard 50 has seted up the micropore that a plurality of intercommunications let out sound hole 30a, under the condition that does not influence the sound wave conveying, keep apart back sound cavity 100b and become the filling chamber that can carry out complete filling, this filling chamber can be filled with and inhale sound granule 70, all spaces that can utilize of sound cavity 100b after effectively utilizing, the filling volume has been increased, the acoustic performance of sound production device 100 has been improved. Meanwhile, the protection part 50 is made of a metal plate, so that on one hand, the structural strength is ensured, meanwhile, the thickness is small, and the volume of the filling cavity can be further increased; on the other hand, the deformation is not easy to occur randomly, and the convenience of assembly can be improved; and the side wall 53 is provided with a filling hole to form a glue containing groove by enclosing with the sounding monomer 30, and after the protection piece 50 covers the sounding monomer 30, the glue can be filled in the glue containing groove, so that the connection of the protection piece 50 is more convenient and stable.

It can be appreciated that in order to further improve the mounting stability of the protection member 50. In an alternative embodiment, the filling hole 533 extends toward and through the edge of the sidewall 53, the filling hole 533 extends to the bottom wall 51, and the filling hole 533 includes a first portion located on the sidewall 53 and a second portion located on the bottom wall 51.

In this embodiment, the filling hole 533 extends toward the edge of the sidewall 53 and penetrates through the edge of the sidewall 53, that is, the opening of the filling hole 533 is U-shaped and extends to the edge of the sidewall 53, so that the edge of the sidewall 53 is adhered more firmly, and the structural stability is further improved. Meanwhile, the filling hole 533 extends toward the bottom wall 51 to form a second portion, i.e., to expose a portion of the conductive yoke 35, so that the adhesion area can be further increased, and the connection stability can be improved.

In this embodiment, the housing 10 includes an upper housing 11 and a lower housing 13 that can be assembled, and the upper housing 11 and the lower housing 13 are connected and enclose to form a receiving cavity. Here, the material of the upper shell 11 may be plastic, and the upper shell is integrally formed by injection molding, so that the structure is stable and the processing is convenient. Alternatively, the upper housing 11 is partially made of plastic and partially made of metal, and is not limited herein. The material of the lower case 13 may be metal or plastic, and is not limited herein. Thus, the housing 10 of the split structure can facilitate the assembly of the sound generating unit 30.

Specifically, the sound generating unit 30 is fixed on the upper shell 11, the upper shell 11 plays a role in bearing and protecting the sound generating unit 30, the lower shell 13 covers and is connected to the periphery of the upper shell 11, the connection mode between the sound generating unit and the upper shell can be glue bonding or ultrasonic welding, and the connection mode has a good sealing effect. The sound generating unit 30 is arranged on one side of the vibrating diaphragm 31 facing the upper shell 11, the upper shell 11 and the sound generating unit 30 are arranged at intervals and form a front sound cavity 100a in a surrounding mode, and the sound generating unit 30 is arranged on one side of the magnetic guide yoke 35 facing the lower shell 13 and jointly form a rear sound cavity 100b in a surrounding mode with the upper shell 11 and the lower shell 13. Here, the filling hole communicating with the rear acoustic chamber 100b may be formed in the upper case 11, the lower case 13, or both the upper case 11 and the lower case 13, and may be set according to actual requirements.

In an alternative embodiment, the thickness of the guard 50 is 0.15mm or less.

In the present embodiment, it is understood that, in order to ensure the volume of the filling cavity, the thickness of the plate material of the protection member 50 is not necessarily large, and a metal plate material with a relatively small thickness is selected as far as possible, so as to ensure that the thickness thereof does not exceed 0.15mm, i.e. is less than or equal to 0.15mm, for example, the thickness dimension of the protection member 50 is 0.15mm, 0.1mm, or 0.05mm, etc.

Referring to fig. 7 to 9, in an alternative embodiment, the sound generating unit 30 includes a single housing 33 and a magnetic conductive yoke 35 connected to a periphery of the single housing 33, a sound leakage hole 30a is formed between the single housing 33 and the magnetic conductive yoke 35, the bottom wall 51 is attached to the magnetic conductive yoke 35, the side wall 53 is connected to the magnetic conductive yoke 35 and/or the single housing 33, the side wall 53 covers the sound leakage hole 30a, and the plurality of micro holes include a plurality of second micro holes 531 opened on the side wall 53 at positions corresponding to the sound leakage hole 30 a.

It is understood that the sound generating unit 30 has sound waves propagating towards both the front sound cavity 100a and the rear sound cavity 100b to improve the acoustic effect, and the sound leaking hole 30a in the rear sound cavity 100b is formed between the unit housing 33 and the magnetic yoke 35 and is provided with an elastic support piece to improve the vibration effect of the voice coil 32. Specifically, the single housing 33 is annularly disposed, for example, rectangular and annularly shaped, and a blocking pillar is convexly disposed on the surface of the annular facing the magnetic yoke 35, and two blocking pillars are convexly disposed on one side in a length direction, the elastic supporting piece is provided with four corners respectively located on the single housing 33 facing the magnetic yoke 35, the magnetic yoke 35 is provided with a slot for avoiding the elastic supporting piece, the two blocking pillars are clamped between the hole walls of the two slots on one side of the magnetic yoke 35, so as to form a fixed connection structure with the magnetic yoke 35, a sound leaking hole 30a is formed between the single housing 33 and the slot wall in a surrounding manner, where there are four sound leaking holes 30a respectively located at four corners of the sound generating unit 30. Two filling holes 533 formed in the sidewall 53 are also formed between the two pillars, corresponding to the side magnetic path portions 34.

In this structure, let out the sound hole 30a and have the direction of perpendicular to vibrating diaphragm 31 vibration, so a plurality of micropores include a plurality of second micropores 531 that are located on lateral wall 53, and its axis corresponds the direction of letting out the vibration of the perpendicular vibrating diaphragm 31 of sound hole 30a, so, can increase the contact space between sound production monomer 30 and the sound absorption granule 70, and then guarantee the propagation velocity of sound wave, improve acoustic effect. Here, the shape of the second micro-hole 511 may be circular, square, polygonal, or the like, and is not limited thereto.

Meanwhile, the sound leakage hole 30a further has a direction vibrating toward the diaphragm 31, in order to improve the sound wave propagation efficiency of the sound generating unit 30 and the rear sound cavity 100b, the plurality of micropores include a plurality of first micropores 511 opened on the bottom wall 51, and an axis of the first micropore 511 is parallel to the vibration direction of the diaphragm 31.

The axis of the first micro-hole 511 is consistent with the vibration direction of the diaphragm 31, that is, the axis of the first micro-hole 511 is perpendicular to the surface of the magnetic conductive yoke 35, here, the bottom wall 51 is provided with the first micro-hole 511, and the number of the first micro-hole 511 can be set according to the requirement. The first micro holes 511 combined with the second micro holes 531 can further increase the contact space between the sound generating unit 30 and the sound absorbing particles, thereby improving the acoustic effect. Here, the shape of the second micro-hole 531 may correspond to the shape of the first micro-hole 511, for example, a square, a circle, a polygon, or the like. Of course, in other examples, the shapes of the two may not be the same. At this time, the plurality of first micro-holes 511 are distributed at one corner of the bottom wall 51 in an array, the bottom wall 51 is provided with a plurality of first micro-holes 511 in four arrays, and correspondingly, the plurality of second micro-holes 531 of the side wall 53 are also arranged in an array and respectively correspond to the positions of the first micro-holes 511.

Here, when the shape of the minute hole is a circle, in order to improve protection of the sound generating unit 30, the size of the minute hole is not necessarily large, otherwise, the shielding and sealing effect cannot be exerted, and the diameter range of the minute hole 511 is set to be greater than or equal to 0.15mm, for example, 0.05mm, 0.1mm, and 0.15mm, so that leakage of the sound absorbing particle 70 can be prevented to the maximum extent without affecting sound wave propagation. The micro-holes are micro-holes formed by press forming or etching. In this way, the protection element 50 with this structure can form the micro-holes by stamping or etching, which is simple and convenient, and effectively improves the processing efficiency.

Referring to fig. 6 and 9, optionally, a support portion 331 is disposed at a position of the cell housing 33 corresponding to the sound vent 30a, and a portion of the side wall 53 corresponding to the sound vent 30a is overlapped on the support portion 331 to form an isolation structure.

In the present embodiment, when the cell housing 33 is disposed in a rectangular ring shape, the side edges in the longitudinal direction are formed with the pillars, the surface facing the magnetic yoke 35 in the width direction is the saddle portion 331, the side wall 53 of the protection member 50 covers the outer surface of the pillars corresponding to the side wall of the magnetic path portion 34, and the edge corresponding to the sound discharge hole 30a abuts against the saddle portion 331, so that an isolation structure is formed between the sound discharge hole 30a and the sound generating unit 30.

Referring to fig. 7 and 8, in an alternative embodiment, the bottom wall 51 is provided with an avoiding hole 513 spaced apart from the first micro hole 511, and the magnetic yoke 35 and the hole wall of the avoiding hole 513 surround to form a containing groove for containing a part of the sound-absorbing particles 70.

In this embodiment, in order to further increase the space volume of the filling cavity, an avoiding hole 513 is formed in the middle of the bottom wall 51, and the avoiding hole 513 is located in the middle of the bottom wall 51 and spaced from the plurality of first micro holes 511, so that the opening size of the avoiding hole 513 can be increased as much as possible. Certainly, this opening size of dodging hole 513 also can not be too big, can set up according to the size of yoke 35, and the biggest can not be greater than yoke 35's surface area to make yoke 35 can cover dodging hole 513 completely, and form the storage tank with the pore wall enclosure of dodging hole 513, so then increased and to hold the space that inhales sound granule 70, further increase the filling space, effectively improved the acoustic performance in back sound chamber 100 b. The shape of the avoiding hole 513 may be circular, square, or polygonal, and the like, and is not limited herein. Optionally, the avoiding hole 513 is rectangular and is matched with the magnetic yoke 35, so that the opening size of the avoiding hole 513 can be increased to the maximum extent, and the filling volume is increased.

Referring to fig. 8 and 9, in order to facilitate assembly, in an alternative embodiment, the magnetic yoke 35 includes a body 351 and a blocking wall 353 bent and extended from the body 351, the side wall 53 is provided with an engaging hole 535, the blocking wall 353 is engaged in the engaging hole 535, the engaging hole 535 extends towards the edges of the bottom wall 51 and the side wall 53 respectively, a hook 55 extends from a hole wall of the engaging hole 535 at the bottom wall 51, and the hook 55 is fastened on an outer surface of the blocking wall 353.

In this embodiment, the magnetic conductive yoke 35 includes a body 351 and blocking walls 353 extending from the body 351 in a bending manner, the blocking walls 353 are located at two sides in the width direction, and the end portions of the blocking walls 353 are abutted against the single housing 33, so as to be matched with the blocking columns of the single housing 33, and the stable connection between the two is realized. In the width direction, in order to position the protection component 50 in the width direction, the side wall 53 is provided with an engaging hole 535, and the engaging hole 535 extends towards the edges of the bottom wall 51 and the side wall 53 respectively and penetrates through the edge of the side wall 53, so as to be conveniently clamped on two side surfaces of the blocking wall 353, thereby playing a role in positioning and fixing, and effectively preventing the protection component 50 from shaking in the width direction. Meanwhile, a hook 55 extends from the hole wall of the engaging hole 535 on the bottom wall 51, and the free end of the hook 55 is bent and fastened on the outer surface of the blocking wall 353, so that the protection member 50 can be positioned in the length direction, and the installation stability in the length direction is ensured.

Referring to fig. 4 and 5 again, in an alternative embodiment, the upper shell 11 includes a bottom 111 and a connecting portion 113 connected to a periphery of the bottom 111, the connecting portion 113 is connected to the lower shell 13 in a sealing manner, the bottom 111 is convexly provided with a bearing portion 115, the sound-generating unit 30 is fixed to the bearing portion 115 in a sealing manner and is arranged at an interval with the bottom 111, the connecting portion 113 is provided with a sound-generating channel 1131, and the sound-generating channel 1131 is communicated with the front sound cavity 100 a.

In this embodiment, the sound generating position of the sound generating device 100 is not the surface position of the upper casing 11, but the side surface of the upper casing 11, so as to realize the side sound generating effect. Specifically, the upper case 11 includes a bottom portion 111 and a connecting portion 113 connected to a peripheral edge of the bottom portion 111, and the lower case 13 covers a peripheral edge of the connecting portion 113 so as to enclose a receiving cavity. Here, the connecting portion 113 and the bottom portion 111 are integrally formed, and are injection-molded parts, so that the structural strength is effectively improved, and the structural stability of the sound generating device 100 is ensured. And connecting portion 113 is last to be provided with the stair structure, and inferior valve 13 card is fixed in the cell body structure that the stair structure encloses to close the formation to realize prepositioning, improve the connection convenience. Simultaneously, in order to realize fixed to sound production monomer 30 to for bottom 111 interval sets up, be equipped with bearing part 115 at bottom 111 arch, this bearing part 115 is cyclic annular, with sound production monomer 30's periphery looks adaptation, and both connect through bonding mode, realize better sealed effect, and set up the stair structure at the terminal surface of bearing part 115, thereby realize bearing sound production monomer 30's stability.

Here, the connecting portion 113 is opened with a sound outlet channel 1131, the sound outlet channel 1131 penetrates through the connecting portion 113 and is communicated with the front sound cavity 100a of the sound generating unit 30, that is, communicated with a space formed by the bearing portion 115 and the sound generating unit 30, so as to transmit the sound generated by the vibration of the diaphragm 31 to the outside. In order to adapt to the product structure applied to the sound generating device 100, the axis of the sound outlet channel 1131 is disposed at an included angle, specifically at an acute angle, with respect to the vibration direction of the diaphragm 31, that is, the sound outlet channel 1131 extends obliquely towards the lower shell 13, so as to better match with the applied product, and the longitudinal section of the sound outlet channel 1131 is gradually increased along the direction departing from the front sound cavity 100a, thereby effectively improving the acoustic performance.

Referring to fig. 3 and 4, in addition, in order to further increase the space of the front sound cavity 100a, the upper case 11 further includes a metal sheet 117, the bottom 111 is provided with an assembly hole 1111, the metal sheet 117 covers the periphery of the assembly hole 1111, and the metal sheet 117 directly faces the diaphragm 31 of the sound generating unit 30, that is, the projection of the sound generating unit 30 on the upper case 11 is located in the metal sheet 117, and the metal sheet 117 can be in a thinner state under the condition of ensuring the structural strength, so that the space between the diaphragm 31 and the upper case 11 can be increased, the front sound cavity 100a is increased, and the acoustic performance of the sound generating device 100 is effectively improved.

Referring to fig. 2 and 5, of course, in order to make the sound generating device 100 generate sound, the sound generating device 100 further includes a flexible circuit board 90, and the flexible circuit board 90 is partially accommodated in the accommodating cavity and electrically connected to the sound generating unit 30, so as to transmit an electrical signal to the sound generating unit 30, thereby implementing an electroacoustic conversion function.

The utility model also provides an electronic equipment (not shown), which comprises an outer shell, the shell is inside to have the holding chamber, still includes as above arbitrary sound production device 100, sound production device 100 installs the holding intracavity. Because the utility model discloses a sound production device 100 of electronic equipment has adopted the structure of sound production device 100 of any above-mentioned embodiment, 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.

In this embodiment, the electronic device may be a mobile terminal, such as a mobile phone, a notebook computer, or a tablet computer, or may be a wearable electronic device, such as a bracelet or a telephone watch, which is not limited herein.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sound device, comprising:

a housing forming a receiving cavity;

the protection piece is made of metal sheet materials, is arranged in the rear sound cavity, is fixed on the sounding single body and covers the sound leakage hole, and is enclosed by the protection piece, the sounding single body and the shell to form a filling cavity;

the protection piece comprises a bottom wall and a side wall bent and extended from the periphery of the bottom wall, the side wall is connected to the periphery of the sounding monomer, a filling hole is formed in the side wall, and the hole wall of the filling hole and the sounding monomer are enclosed to form a glue containing groove; and

the sound-absorbing particles are filled in the filling cavity.

2. The sounder device according to claim 1, wherein the fill hole extends toward and through an edge of the side wall, the fill hole extending to the bottom wall, the fill hole comprising a first portion at the side wall and a second portion at the bottom wall.

3. The sounder device according to claim 1, wherein said housing comprises an upper shell and a lower shell, said upper shell and lower shell being connected and enclosing to form said receiving cavity;

4. The sound device of claim 1, wherein the guard has a thickness of 0.15mm or less.

5. The sound producing device as claimed in claim 1, wherein the sound producing unit includes a single housing and a magnetic yoke coupled to a periphery of the single housing, the sound leaking hole is formed between the single housing and the magnetic yoke, the bottom wall is attached to the magnetic yoke, the side wall is coupled to the magnetic yoke and/or the single housing, the side wall covers the sound leaking hole, and the plurality of micro holes includes a plurality of second micro holes opened at positions corresponding to the sound leaking hole on the side wall.

6. The sound production device of claim 5, wherein the bottom wall covers the sound leakage hole, and the plurality of micro holes comprise a plurality of first micro holes opened on the bottom wall, and an axis of the first micro holes is parallel to a vibration direction of the diaphragm.

7. The sound production device of claim 5, wherein the monolithic housing is provided with a support portion corresponding to the sound vent, and a portion of the side wall corresponding to the sound vent is lapped on the support portion to form an isolation structure.

8. The sounding device as claimed in claim 5, wherein an avoiding hole is formed in the middle of the bottom wall, and the magnetic yoke and the wall of the avoiding hole enclose a receiving groove for receiving a portion of the sound-absorbing particles.

9. The sound production device of claim 1, wherein the micro-holes are circular in shape and have a diameter in the range of greater than 0 mm and equal to or less than 0.15 mm;

the micropores are micropores formed by punching or etching.

10. The sound production device as claimed in any one of claims 5 to 8, wherein the magnetic yoke includes a body and a blocking wall extending from the body, the side wall has a latching hole, the blocking wall is latched in the latching hole, the latching hole extends towards the bottom wall and the edge of the side wall, the wall of the latching hole at the bottom wall has a latching hook extending therefrom, and the latching hook is latched to the outer surface of the blocking wall.

11. The sound production device of claim 3, wherein the upper casing comprises a bottom and a connecting portion connected to the periphery of the bottom, the connecting portion is connected to the lower casing in a sealing manner, a bearing portion is protruded from the bottom, the sound production unit is fixed to the bearing portion in a sealing manner and is spaced from the bottom, and the connecting portion is provided with a sound production channel which is communicated with the front sound cavity.

12. An electronic device comprising a housing having a receiving cavity therein, wherein the electronic device further comprises a sound-producing device according to any one of claims 1 to 11, the sound-producing device being mounted in the receiving cavity.