WO2022257738A1 - Sound production device and electronic apparatus - Google Patents

Abstract

Disclosed in the present invention are a sound production device and an electronic apparatus. The sound production device comprises a shell, a sound production unit, a metal protective mesh and sound-absorbing particles, wherein the shell forms an accommodation cavity; the sound production unit is arranged in the accommodation cavity, the sound production unit and the shell enclose a rear sound cavity, and the sound production unit is provided with a sound leakage hole; the metal protective mesh is woven from metal wires, the metal protective mesh is arranged at the rear sound cavity and fixed on the sound production unit, and covers the sound leakage hole, and a plurality of air vents are evenly distributed in the metal protective mesh; the metal protective mesh, the sound production unit and the shell jointly enclose a filling cavity; and the filling cavity is filled with the sound-absorbing particles. The sound production device in the technical solution of the present invention can improve the filling utilization rate and the convenience of assembly.

Description

Sound generating devices and electronic equipment technical field

The invention relates to the technical field of acoustic-electric conversion, in particular to a sound-generating device and electronic equipment.

Background technique

The sound-generating device is an important acoustic component in electronic equipment, and it is a transducer device that converts electrical signals into acoustic signals. With the rapid development of electronic equipment, higher requirements are put forward for the performance of sound-generating devices. At present, the equivalent volume of the audio rear cavity can be increased through filling technology, but the available physical space of the existing sound-generating devices is not fully used for filling sound-absorbing particles, resulting in waste of space; and the full filling technology The assembly of the guard is poor.

Contents of the invention

The main purpose of the present invention is to propose a sounding device, aiming at improving the filling utilization rate and the convenience of assembly of the sounding device.

In order to achieve the above object, the sounding device proposed by the present invention includes:

a housing forming an accommodating chamber;

A sounding unit, the sounding unit is arranged in the accommodating cavity, a rear acoustic cavity is formed between the sounding unit and the housing, and a sound leakage hole is provided on the sounding unit;

A metal protective net, the metal protective net is woven by metal wires, the metal protective net is set in the rear acoustic cavity, fixed on the sound emitting unit and covers the sound leakage hole, the metal protective net The mesh is evenly distributed with a plurality of ventilation holes, and the metal protective mesh, the sounding unit and the shell are jointly enclosed to form a filling cavity; and

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

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

The sound-generating unit is arranged in the accommodation cavity, and is sealed and fixed on the upper shell, and the sound-generating unit includes a diaphragm, and the diaphragm and the upper case are spaced and enclosed to form a front acoustic cavity;

The metal protective net, the sound emitting unit, the lower shell and the upper shell jointly form the filling cavity.

In an optional embodiment, the metal protective net includes a plurality of intertwined metal wires, and the diameter of each metal wire is less than or equal to 0.15mm.

In an optional embodiment, the air hole is square or polygonal in shape;

And/or, the diagonal length of the ventilation hole is greater than 0 and less than or equal to 0.15mm.

In an optional embodiment, the metal protective net includes a bottom wall and a side wall bent and extended from the periphery of the bottom wall, and the side wall is bonded to the periphery of the sound emitting unit.

In an optional embodiment, the sound emitting unit includes a connected unit case and a magnetic conduction yoke, and the sound leakage hole is formed between the unit case and the magnetic conduction yoke.

In an optional embodiment, a platform portion is provided at a position corresponding to the sound leakage hole of the single shell, and a portion of the side wall corresponding to the sound leakage hole is overlapped on the platform portion to form an isolation structure.

In an optional embodiment, one of the monocoque and the magnetic yoke is bent and extended to form a blocking wall, the blocking wall is connected to the other peripheral edge, and the side wall is provided with a The locking hole is adapted to the blocking wall, and the blocking wall is fixed in the locking hole.

In an optional embodiment, the magnetic yoke includes a main body and the blocking wall bent and extended from the main body, the engaging hole runs through the edge of the side wall, and the bottom wall is provided with an avoidance hole. The escape hole communicates with the engaging hole.

In an optional embodiment, the upper shell includes a bottom and a connecting portion connected to the periphery of the bottom, the connecting portion is sealingly connected with the periphery of the lower shell, the bottom is protruded with a bearing portion, and the sound-emitting unit is sealed It is fixed on the bearing part and spaced apart from the bottom, and the connecting part is opened with a sound channel, and the sound channel communicates with the front sound cavity.

The present invention also proposes an electronic device, which includes a casing, the casing has an accommodating cavity inside, and further includes any sound-generating device as described above, and the sound-generating device is installed in the accommodating cavity.

The sound emitting device of the technical solution of the present invention includes a casing, a sound emitting unit, a metal protective net and sound-absorbing particles, and the housing is formed with an accommodating chamber for accommodating the sound emitting unit to provide protection. The sound emitting unit and the shell are enclosed to form a rear acoustic cavity, the sound emitting unit is provided with a sound leak hole, and a metal protective net is arranged in the rear acoustic cavity, and the metal protective net is fixed on the sound emitting unit and covers the sound leakage hole , reduce parts, assemble it with the sound unit and fix it directly to the upper case, simplifying assembly and improving convenience. At the same time, the metal protective net has high structural strength and thin thickness, and there are evenly distributed air holes on it, so that the sound-emitting monomer can be covered and isolated to form a filling cavity, which can be filled with sound-absorbing particles, effectively utilizing all the available space in the rear acoustic cavity The space increases the filling volume, and the evenly distributed air holes increase the contact area between the sound-absorbing particles and the sound wave, improving the acoustic performance of the sound-generating device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is the front view of an embodiment of the sound generating device of the present invention;

Fig. 2 is a top view of the sound emitting device shown in Fig. 1;

Fig. 3 is a bottom view of the sound generating device shown in Fig. 1;

Fig. 4 is a cross-sectional view of the sound-generating device shown in Fig. 3 along line A-A;

Fig. 5 is an exploded view of the sound-generating device shown in Fig. 1;

Fig. 6 is a structural schematic diagram of the protective part and the sounding unit in the sounding device shown in Fig. 1;

Fig. 7 is a longitudinal sectional view of the guard and the sounding unit shown in Fig. 6;

Fig. 8 is a structural schematic diagram of the protective part in the sound emitting device shown in Fig. 1;

Fig. 9 is a schematic structural view of the sound emitting unit in the sound emitting device shown in Fig. 1 .

Explanation of reference numbers:

100	Sound device	32	voice coil
100a	front vocal cavity	33	Monocoque
100b		back cavity	34	side magnetic circuit part
10	case	35	Magnetic yoke
11	upper shell	351	ontology
111	bottom	353	retaining wall
1111	Assembly hole	37	Central magnetic circuit part
113	Connection	50	metal fence
1131	Sound channel	51	bottom wall
115	Loading part	511	avoidance hole

117	Metal sheets	53	side wall
13	lower shell	531	Fastening hole
30	Sound unit	70	Sound-absorbing particles
30a		Vent hole	80	Filling cap
31	Diaphragm	90	flexible circuit board
331	Platform	the	the

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

In the present invention, unless otherwise specified and limited, the terms "connection" and "fixation" should be understood in a broad sense, for example, "fixation" can be a fixed connection, a detachable connection, or an integral body; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In addition, in the present invention, descriptions such as "first", "second" and so on are used for description purposes only, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

The present invention proposes a sound emitting device 100 .

Please refer to Fig. 1, Fig. 4, Fig. 5 and Fig. 7, in an embodiment of the present invention, the sound emitting device 100 includes a housing 10, a sound emitting unit 30, a metal protective net 50 and sound-absorbing particles 70, the housing 10 forms an accommodation cavity; the sound emitting unit 30 is arranged in the accommodation cavity, and the sound emitting unit 30 is surrounded by the housing 10 to form a rear acoustic cavity 100b, and the sound emitting unit 30 is provided with a sound leakage hole 30a;

The metal protective net 50 is braided by metal wires. The metal protective net 50 is arranged in the rear acoustic cavity 100b, fixed on the sound emitting unit 30 and covers the sound leakage hole 30a. The metal protective net 50 The net 50 is evenly distributed with a plurality of ventilation holes, and the metal protective net 50, the sound emitting unit 30 and the housing 10 together form a filling cavity; the sound-absorbing particles 70 are filled in the filling cavity.

It can be seen that the sounding unit 30 includes components such as a support assembly, a vibration system, and a magnetic circuit system, wherein the vibration system includes a diaphragm 31, and the support assembly includes a single shell 33 and a magnetically conductive plate arranged on the inner edge of the single shell 33 , the magnetic circuit system includes a magnetic yoke 35 and a central magnetic circuit part 37 and a side magnetic circuit part 34 arranged on the magnetic yoke 35. The single case 33 extends in a ring shape along the outer edge of the magnetic yoke 35 and is respectively connected Magnetic yoke 35 and diaphragm 31. Here, the ring-shaped unit case 33 may be a closed ring structure or a non-closed ring structure. The side magnetic circuit part 34 is arranged around the periphery of the central magnetic circuit part 37 at intervals, and the gap between the side magnetic circuit part 34 and the central magnetic circuit part 37 forms a magnetic gap. 34 together form a structure with an opening facing the diaphragm 31. The vibration system also includes a voice coil 32. One end of the voice coil 32 is fixed to the diaphragm 31, and the other end extends into the above-mentioned magnetic gap. The vibrating membrane 31 vibrates to realize the function of sound generation.

In this embodiment, the sound-generating device 100 also includes a housing 10, which forms an accommodating chamber in which the sound-generating unit 30 can be installed, so as to play a protective role and provide a filling space. A rear acoustic cavity 100b is formed between the sounding unit 30 and the housing 10, and the sounding unit 30 is formed with a sound leakage hole 30a, which communicates with the rear acoustic cavity 100b. In order to realize full filling, a metal protective net 50 is installed in the rear acoustic cavity 100b , the metal protective net 50 is connected to the sounding unit 30 and covers the sound leakage hole 30a, that is, the metal protective net 50 is sealed and connected to the outer surface of the magnetic yoke 35 and the joint between the magnetic yoke 35 and the single case 33 side, so as to seal and protect the sound emitting unit 30 and prevent the sound absorbing particles 70 from entering the sound emitting system. The connection mode between the metal protective net 50 and the sound emitting unit 30 can be bonding, so as to realize the sealing effect while connecting the two. Certainly, the way of connecting the two may also be clamping or welding. Optionally, the metal protective net 50 is braided by metal wires, and its material may be, but not limited to, iron, nickel, iron-nickel alloy, steel, and the like. The metal protective net 50 has evenly distributed air holes, which can evenly transmit the sound waves of the sound emitting unit 30 to the rear acoustic cavity 100b, and increase the transmission area and improve the transmission efficiency. The metal protective net 50, the shell 10 and the sound-emitting unit 30 enclose a filling cavity, and the sound-absorbing particles 70 are filled in the filling cavity. The sound-absorbing particles 70 can be zeolite, activated carbon, etc., and can absorb or desorb gas to achieve equivalent expansion. The volumetric effect improves the acoustics.

Certainly, in order to realize the filling of the sound-absorbing particles 70, optionally, the housing 10 is provided with a filling hole, and the filling hole communicates with the rear acoustic cavity 100b, that is, communicates with the filling cavity. And the filling hole is equipped with a filling cap 80 , which can effectively seal the filling hole through the filling cap 80 after filling, so as to ensure the effectiveness of the sound-absorbing particles 70 .

The sound emitting device 100 of the technical solution of the present invention includes a housing 10, a sound emitting unit 30, a metal protective net 50 and sound-absorbing particles 70. The housing 10 is formed with a cavity for accommodating the sound emitting unit 30 to provide protection. A rear acoustic cavity 100b is formed between the sound emitting unit 30 and the housing 10, and a sound leakage hole 30a is opened on itself, and a metal protective net 50 is arranged in the rear acoustic cavity 100b, and the metal protective net 50 is fixed to the sound unit 30 and covers the The sound leakage hole 30a reduces parts and can be directly fixed to the upper shell 11 after being assembled with the sound emitting unit 30, which simplifies assembly and improves convenience. At the same time, the metal protective net 50 has a high structural strength and a thin thickness, which is not easily deformed, and is also conducive to its assembly. Ventilation holes are evenly distributed on the metal protective net 50, so that the sound emitting unit 30 can be covered and isolated to form a filling cavity, which can be filled with sound-absorbing particles 70, effectively utilizing all the available space of the rear acoustic cavity 100b, and increasing the filling capacity. The volume and evenly distributed air holes increase the contact area between the sound-absorbing particles 70 and the sound wave, and improve the acoustic performance of the sound-generating device 100 .

In an optional embodiment, the housing 10 includes an upper shell 11 and a lower shell 13 connected to the upper shell 11, the upper shell 11 and the lower shell 13 enclose to form the accommodating cavity;

The sounding unit 30 is arranged in the accommodation chamber and sealed and fixed to the upper shell 11. The sounding unit 30 includes a diaphragm 31, and the diaphragm 31 is spaced apart from the upper case 11 and surrounds it. The front acoustic cavity 100a is formed together, and the diaphragm 31, the lower shell 13, the upper shell 11 and the metal protective net 50 enclose to form a filling cavity.

The casing 10 includes an upper shell 11 and a lower shell 13 which can be assembled and connected, and the upper shell 11 is connected with the lower shell 13 and encloses to form an accommodating cavity. Here, the material of the upper case 11 can be plastic, which is integrally formed by injection molding, and has a stable structure and is convenient for processing. Alternatively, part of the structural material of the upper shell 11 is plastic, and part is metal, which is not limited here. The material of the lower shell 13 can be metal or plastic, which is not limited here. In this way, the casing 10 with a split structure can facilitate the assembly of the sound emitting unit 30 more conveniently.

Specifically, the sounding unit 30 is fixed on the upper case 11 , the upper case 11 plays a role of carrying and protecting the sounding unit 30 , and the lower case 13 covers and is connected to the periphery of the upper case 11 . In an optional embodiment, the upper shell 11 and the lower shell 13 are connected by glue bonding or ultrasonic welding, which not only achieves a stable connection, but also has a good sealing effect. The side of the sounding unit 30 where the diaphragm 31 is set faces the upper shell 11, and the upper shell 11 and the sounding unit 30 are spaced apart to form a front acoustic cavity 100a. The side of the sounding unit 30 where the magnetic yoke 35 is set faces The lower shell 13, together with the upper shell 11 and the lower shell 13, forms the rear acoustic cavity 100b.

Here, the filling holes for filling can be set on the upper shell 11 , or on the lower shell 13 , or on the upper shell 11 and the lower shell 13 . Of course, in other embodiments, the sound-absorbing particles 70 can also be poured in when the upper shell 11 and the lower shell 13 are assembled.

In an optional embodiment, the metal protective net 50 includes a plurality of intertwined metal wires, and the diameter of each metal wire is less than or equal to 0.15 mm.

In this embodiment, the metal protective net 50 is composed of a plurality of metal wires interlaced, so that the metal protective net 50 can be made lighter and thinner, reducing the occupation of the rear acoustic cavity 100b, increasing the volume of the filling cavity, and maximizing the filling space , so as to achieve better acoustic performance. Here, in order to ensure the filling utilization rate, the diameter range of the metal wire should not be large, and the diameter range of the metal wire is set to be less than or equal to 0.15mm, for example, 0.15mm, 0.1mm or 0.05mm, etc., so as to ensure that the metal protective net The overall thickness of 50 is not more than 0.15mm, effectively increasing the volume of the filling cavity.

In an optional embodiment, the air hole is square or polygonal in shape;

And/or, the diagonal length of the ventilation hole is greater than 0 and less than or equal to 0.15mm.

In this embodiment, the metal protective net 50 is braided with metal wires, so the shapes of the ventilation holes are mostly square or polygonal, which is convenient for processing and reduces processing difficulty. In order to improve the protection of the sound emitting unit 30, the size of the vent hole should not be large, otherwise it cannot play the role of shielding and sealing. When the vent hole is rectangular, the diagonal length of the vent hole is the diameter of the circle where the vent hole is located, which is also the maximum size. Set the diagonal length of the vent hole to be greater than 0 and less than or equal to 0.15mm, for example, 0.05mm, 0.1 mm and 0.15mm, can prevent the leakage of the sound-absorbing particles 70 to the greatest extent without affecting the propagation of sound waves.

Please refer to FIG. 6 to FIG. 8 in combination. In an optional embodiment, the metal protective net 50 includes a bottom wall 51 and a side wall 53 bent and extended from the periphery of the bottom wall 51, and the side wall 53 is bonded to the periphery of the sound emitting unit 30 .

In this embodiment, the metal protective net 50 includes a bottom wall 51 and a side wall 53 , the bottom wall 51 abuts against the outer surface of the magnetic yoke 35 , and the side wall 53 covers and seals the connecting position between the magnetic yoke 35 and the monocoque 33 place. Specifically, the bottom wall 51 and the side wall 53 are integrally formed with a high structural strength, which can effectively ensure the service life of the metal protective net 50 . The side wall 53 is formed by bending and extending the bottom wall 51. The bottom wall 51 is covered on the surface of the magnetic guide yoke 35, and then the side wall 53 is bent toward the connection between the magnetic guide yoke 35 and the single case 33 to fit tightly. The assembly of the metal protective net 50 can be realized, and the assembly can be more convenient compared with a plurality of divided parts. Of course, in order to improve the connection stability, glue can be applied to some positions of the side wall 53 , so as to prevent the metal protective net 50 from detaching, and at the same time, it can also prevent the sound-absorbing particles 70 from entering the sound-emitting unit 30 .

Please refer to FIG. 7 to FIG. 9 in combination. In an optional embodiment, the sound emitting unit 30 includes a connected single case 33 and a magnetically conductive yoke 35, and a There is the sound leak hole.

It can be understood that, in order to improve the acoustic effect, the sound emitting unit 30 has sound waves propagating towards the front acoustic cavity 100a and the rear acoustic cavity 100b at the same time, and the sound outlet 30a in the rear acoustic cavity 100b is formed between the single shell 33 and the magnetically conductive yoke 35. The space is formed, and an elastic supporting piece is provided to improve the vibration effect of the voice coil 32 . Specifically, the single case 33 is arranged in a ring shape, for example, a rectangular ring shape, and a stop post is protruded from the surface of the ring shape facing the magnetic guide yoke 35, and two stop posts are protruded from one side in a length direction. , the elastic struts are provided with four corners respectively located at the four corners of the monocoque 33 facing the magnetic yoke 35, the magnetic yoke 35 is provided with slots for avoiding the elastic struts, and the two retaining columns are fastened to the magnetic yoke 35 between the walls of the two slots on one side, thus forming a fixed connection structure with the magnetic yoke 35, and the sound hole 30a is formed between the monocoque 33 and the walls of the slot, where the sound comes out There are four holes 30a, which are respectively located at the four corners of the sound emitting unit 30. The sound holes 30a have a direction of vibration toward the diaphragm 31 and a direction perpendicular to the vibration of the diaphragm 31, and are located in the width direction of the monocoque 33. The top extends from both ends to the middle. The side magnetic circuit part 34 is set between the two retaining posts, and the side wall 53 of the metal protective net 50 is attached to the outer surface of the two retaining posts and the side magnetic circuit part 34, and glue can be applied on the inner surface of the metal protective net 50 for bonding. Connect directly to achieve a stable sealing effect.

Optionally, the monocoque 33 is provided with a platform part 331 corresponding to the position of the sound leakage hole 30a, and the part of the side wall 53 corresponding to the sound leakage hole 30a is overlapped on the platform part 331 to form isolation structure.

In this embodiment, when the monocoque 33 is arranged in a rectangular ring shape, a stop post is formed on the side of its length direction, and the surface facing the magnetic guide yoke 35 in the width direction is a platform portion 331, and the guard 50 The side wall 53 of the side wall 53 corresponding to the side wall of the side magnetic circuit part 34 covers the outer surface of the blocking column, and the edge corresponding to the sound leakage hole 30a abuts against the platform part 331, thereby forming an isolation structure with the sound emitting unit 30, so , it can ensure that while covering the sound leakage hole 30a, the occupied space of the protective member 50 can be further reduced, thereby increasing the volume of the filling cavity.

In order to facilitate assembly, in an optional embodiment, the peripheral edge of one of the monocoque 33 and the magnetic yoke 35 is bent and extended to form a blocking wall 353, and the blocking wall 353 is connected to the peripheral edge of the other. , the side wall 53 is provided with an engaging hole 531 adapted to the blocking wall 353 , and the blocking wall 353 is fastened in the engaging hole 531 .

When connecting, in order to realize the positioning of the metal protective net 50, in the width direction, the peripheral edge of one of the monocoque 33 and the magnetic yoke 35 is bent and extended to form a blocking wall 353, and the blocking wall 353 is connected to the peripheral edge of the other. connection, which in turn can improve the stability of the connection structure between the two. At this time, the side wall 53 is provided with an engaging hole 531 that is compatible with the retaining wall 353, and the retaining wall 353 is fastened in the engaging hole 531. The engaging hole 531 is arranged in a rectangular shape, and the opposing two hole walls are opposite to the retaining wall. 353 to limit the position in the width direction, thereby realizing the positioning of the metal protective net 50, facilitating subsequent bonding, and further improving the convenience of assembly.

Please refer to FIG. 8 and FIG. 9. In an optional embodiment, the magnetic yoke 35 includes a main body 351 and the blocking wall 353 bent and extended from the main body 351, and the engaging hole 531 runs through the side On the edge of the wall 53 , the bottom wall 51 defines a avoidance hole 511 , and the avoidance hole 511 communicates with the engaging hole 531 .

In this embodiment, the magnetic guide yoke 35 includes a main body 351 and a blocking wall 353 bent and extended from the main body 351. The blocking wall 353 is located on both sides in the width direction thereof, and the ends of the blocking wall 353 abut against the single case 33 , so as to cooperate with the retaining post of the monocoque 33 to achieve a stable connection between the two. In order to facilitate the locking of the retaining wall 353 into the engaging hole 531, the engaging hole 531 extends toward the edge of the side wall 53 and penetrates through the edge of the side wall 53, and an avoidance hole 511 communicating with the engaging hole 531 is provided on the bottom wall 51. When the metal protective net 50 covers the sound emitting unit 30 from top to bottom, the retaining wall 353 can be easily snapped into the engaging hole 531 to play a role of positioning and fixing, effectively preventing the metal protective net 50 from shaking in the width direction The avoidance hole 511 can avoid the transition area between the body 351 and the blocking wall 353 to avoid interference and improve the convenience of assembly.

Please refer to FIG. 4 and FIG. 5 again. In an optional embodiment, the upper shell 11 includes a bottom 111 and a connecting portion 113 connected to the periphery of the bottom 111, and the connecting portion 113 is sealingly connected to the periphery of the lower shell 13. The bottom 111 is protrudingly provided with a bearing part 115, the sound emitting unit 30 is sealed and fixed on the bearing part 115, and is spaced apart from the bottom 111, and the connecting part 113 is provided with a sound output channel 1131, and the output The acoustic channel 1131 communicates with the front acoustic cavity 100a.

In this embodiment, the sound emitting position of the sound emitting device 100 is not on the surface of the upper case 11 , but on the side of the upper case 11 , so as to realize the effect of side sound emission. Specifically, the upper case 11 includes a bottom 111 and a connecting portion 113 connected to the periphery of the bottom 111 , and the lower case 13 covers the periphery of the connecting portion 113 to form an accommodating cavity. Here, the connecting part 113 and the bottom 111 are integrally formed, which is an injection molded part, which effectively improves the structural strength and ensures the structural stability of the sound-generating device 100 . Furthermore, a stepped structure is provided on the connecting portion 113 , and the lower case 13 is fixed in the groove structure enclosed by the stepped structure, so as to realize pre-positioning and improve connection convenience. Simultaneously, in order to realize the fixation of the sounding unit 30, and set at intervals relative to the bottom 111, the bottom 111 is protruded with a bearing portion 115, the bearing portion 115 is ring-shaped, and is adapted to the periphery of the sounding unit 30. The ones are connected by bonding to achieve a better sealing effect, and a stepped structure is provided on the end surface of the bearing part 115 , so as to realize stable bearing and fixing of the sound emitting unit 30 .

Here, a sound output channel 1131 is opened in the connecting portion 113, and the sound output channel 1131 passes through the connecting portion 113 and communicates with the front acoustic cavity 100a of the sound emitting unit 30, that is, communicates with the bearing portion 115 and surrounds the sound emitting unit 30 The formed space transmits the sound generated by the vibration of the diaphragm 31 to the outside world. In order to better adapt to the product structure of the sound-generating device 100, the axis of the sound-emitting channel 1131 is set at an included angle with respect to the vibration direction of the diaphragm 31, specifically at an acute angle, that is, the sound-emitting channel 1131 is inclined toward the direction of the lower shell 13 Extending can reduce the dust falling directly into the diaphragm 31 and improve the dustproof effect, and the longitudinal section of the sound channel 1131 gradually increases along the direction away from the front acoustic cavity 100a, effectively improving the acoustic performance.

Please refer to Fig. 3 and Fig. 4, in an optional embodiment, the upper shell 11 further includes a metal sheet 117, and the bottom 111 is provided with an assembly hole 1111 matching the sound emitting unit 30, and the metal The sheet 117 is connected to the periphery of the fitting hole 1111 .

In order to further increase the space of the front acoustic chamber 100a, the upper shell 11 further includes a metal sheet 117, which may be made of iron, nickel or steel. The bottom 111 is provided with an assembly hole 1111, and the metal sheet 117 covers the periphery of the assembly hole 1111. The metal sheet 117 is facing the diaphragm 31 of the sound emitting unit 30, that is, the projection of the sound emitting unit 30 on the upper shell 11 is uniform. Located in the metal sheet 117, because the metal sheet 117 can be made thinner while ensuring the structural strength, the space between the diaphragm 31 and the upper shell 11 can be increased, and the front acoustic cavity 100a can be enlarged, thereby effectively improving the sound output. Acoustic performance of device 100 .

Please refer to FIG. 2 and FIG. 5 , of course, in order to make the sounding device 100 sound, the sounding device 100 also includes a flexible circuit board 90 , the flexible circuit board 90 is partly housed in the accommodating cavity, and is electrically connected to the sounding unit 30 , Therefore, the electric signal can be transmitted to the sound emitting unit 30, so that it can realize the electro-acoustic conversion function.

The present invention also proposes an electronic device (not shown), comprising a casing, the casing has an accommodating cavity inside, and also includes the sounding device 100 as described above, and the sounding device 100 is installed in the accommodating cavity Inside. Since the sound-generating device 100 of the electronic device of the present invention adopts the structure of the sound-generating device 100 of any of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be repeated 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 phone watch, which is not limited herein.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (11)

1. A sounding device, characterized in that the sounding device comprises:

   a housing forming an accommodating chamber;

   A sounding unit, the sounding unit is arranged in the accommodating cavity, a rear acoustic cavity is formed between the sounding unit and the housing, and a sound leakage hole is provided on the sounding unit;

   A metal protective net, the metal protective net is woven by metal wires, the metal protective net is set in the rear acoustic cavity, fixed on the sound emitting unit and covers the sound leakage hole, the metal protective net The mesh is evenly distributed with a plurality of ventilation holes, and the metal protective mesh, the sounding unit and the shell are jointly enclosed to form a filling cavity; and

   Sound-absorbing particles, the sound-absorbing particles are filled in the filling cavity.
2. The sound-generating device according to claim 1, wherein the housing comprises an upper shell and a lower shell connected to the upper shell, and the upper shell and the lower shell enclose to form the accommodating cavity;

   The sounding unit is arranged in the accommodation cavity and sealed and fixed to the upper shell, the sounding unit includes a diaphragm, and the diaphragm is spaced apart from the upper case and encloses to form a front acoustic cavity;

   The metal protective net, the sound emitting unit, the lower shell and the upper shell jointly form the filling cavity.
3. The sound-generating device according to claim 1, wherein the metal protective net comprises a plurality of interlaced metal wires, and the diameter range of each of the metal wires is less than or equal to 0.15 mm.
4. The sound emitting device according to claim 1, characterized in that, the shape of the vent hole is square or polygonal;

   And/or, the diagonal length of the ventilation hole is greater than 0 and less than or equal to 0.15mm.
5. The sound-generating device according to any one of claims 1 to 4, wherein the metal protective net comprises a bottom wall and a side wall bent and extended from the periphery of the bottom wall, and the side wall is bonded to the Describe the periphery of the vocal unit.
6. The sound-generating device according to claim 5, wherein the sound-generating unit comprises a connected single case and a magnetically conductive yoke, and the sound leakage is formed between the single case and the magnetically conductive yoke. hole.
7. The sound-generating device according to claim 6, characterized in that, the position of the monocoque corresponding to the sound leakage hole is provided with a platform part, and the part of the side wall corresponding to the sound leakage hole is overlapped with the support An isolation structure is formed on the platform.
8. The sound-generating device according to claim 6, characterized in that, one of the monocoque and the magnetic yoke is bent and extended to form a blocking wall, and the blocking wall is connected to the other peripheral edge, so that The side wall is provided with an engaging hole matched with the blocking wall, and the blocking wall is fixed in the engaging hole.
9. The sound emitting device according to claim 8, wherein the magnetic yoke includes a body and the blocking wall bent and extended from the body, the engaging hole runs through the edge of the side wall, the The bottom wall is provided with an escape hole, and the avoidance hole communicates with the engaging hole.
10. The sound-generating device according to claim 2, wherein the upper case comprises a bottom and a connecting portion connected to the periphery of the bottom, the connecting portion is sealed and connected to the periphery of the lower case, and the bottom is protruded with a bearing portion , the sound emitting unit is sealed and fixed on the bearing part, and is spaced apart from the bottom, and the connecting part is provided with a sound output channel, and the sound output channel communicates with the front acoustic cavity.
11. An electronic device, comprising a housing with an accommodating cavity inside, characterized in that it further comprises the sound emitting device according to any one of claims 1 to 10, the sound emitting device is installed in the accommodating cavity Inside.

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