WO2023273546A1

WO2023273546A1 - Loudspeaker module and electronic device

Info

Publication number: WO2023273546A1
Application number: PCT/CN2022/088402
Authority: WO
Inventors: 陈阿亮; 申兆垒; 陈国强
Original assignee: 歌尔股份有限公司
Priority date: 2021-06-30
Filing date: 2022-04-22
Publication date: 2023-01-05
Also published as: CN113473276A; CN113473276B

Abstract

Disclosed in the present invention are a loudspeaker module and an electronic device using the loudspeaker module. The loudspeaker module comprises a housing, a loudspeaker unit, and an air-permeable isolation member, wherein the housing has an inner cavity; the loudspeaker unit is arranged in the inner cavity and encloses a rear sound cavity with the housing, and the loudspeaker unit is provided with a leak hole; the air-permeable isolation member is an elastic member, and is stretched to cover the loudspeaker unit and cover the leak hole; the rear sound cavity is filled with sound absorption particles; and the air-permeable isolation member is used to prevent the sound absorption particles from entering the leak hole. By means of the technical solution of the present invention, the acoustic performance of the loudspeaker module can be improved.

Description

Speaker modules and electronics

technical field

The invention relates to the technical field of sound energy conversion, in particular to a loudspeaker module and electronic equipment using the loudspeaker module.

Background technique

With the rapid development of electronic equipment, higher requirements are put forward for the performance of its internal speaker module - a larger rear cavity and better acoustic performance are required. But paradoxically, electronic devices are required to be as thin and light as possible. This will directly lead to the limitation of the expansion of the rear acoustic cavity, and even the need for compression. The existing design adopts the method of filling sound-absorbing particles, which increases the equivalent volume of the rear acoustic cavity without expanding the physical volume of the rear acoustic cavity. Moreover, in order to cooperate with the filling of sound-absorbing particles, mesh components are generally arranged in the rear acoustic cavity to isolate the sound-absorbing particles. But at present, this technology still has the defect that the available physical space in the rear acoustic cavity is not fully used for filling sound-absorbing particles, resulting in waste of space and insufficient performance improvement.

Contents of the invention

The main purpose of the present invention is to provide a speaker module and an electronic device using the speaker module, aiming at improving the acoustic performance of the speaker module.

In order to achieve the above object, an embodiment of the present invention proposes a speaker module, the speaker module includes:

a shell, the shell has an inner cavity;

a speaker unit, the speaker unit is arranged in the inner cavity, and is enclosed with the shell to form a rear acoustic cavity, and the speaker unit is provided with a leakage hole; and

Breathable spacer, the breathable spacer is an elastic part, the breathable spacer is stretched and set on the speaker unit and covers the leak hole, the rear acoustic cavity is filled with sound-absorbing particles, and the breathable spacer is used to isolate the sound-absorbing particles from entering the leak hole.

In an embodiment of the present invention, the breathable spacer is a waterproof breathable membrane.

In an embodiment of the present invention, the waterproof and breathable membrane is at least one of polyurethane waterproof and breathable membrane, thermoplastic polyurethane waterproof and breathable membrane, and polytetrafluoroethylene waterproof and breathable membrane.

In one embodiment of the present invention, the inner cavity wall of the housing has a mounting surface, and a frame body is protruded from the mounting surface, and the speaker unit is arranged in the frame body for closing the frame body. the space inside the body to form the front vocal cavity;

The air-permeable spacer is covered on the back of the speaker unit, and the periphery of the air-permeable spacer is fixed to the frame.

In an embodiment of the present invention, the air-permeable spacer includes a central part and a peripheral part extending along the peripheral edge of the central part, the central part covers the back of the speaker unit, and the peripheral part Extended along the surrounding direction of the frame body, and fixed on the end surface of the frame body away from the installation surface.

In an embodiment of the present invention, the peripheral portion is connected to the frame body by thermal fusion or adhesive bonding.

In an embodiment of the present invention, the speaker module further includes a support member, the support member is extended along the extension direction of the peripheral portion, and is provided on the surface of the peripheral portion away from or close to the frame .

In an embodiment of the present invention, the support member is any one of foam, steel sheet and PET sheet.

In an embodiment of the present invention, the head end and the tail end of the peripheral part are arranged at intervals to form an escape position between the central part and the frame body;

The speaker module also includes a flexible circuit board, the flexible circuit board is installed in the avoidance position, and is electrically connected with the speaker unit;

The gap between the central part and the flexible circuit board, the gap between the peripheral part and the flexible circuit board, and the gap between the frame and the flexible circuit board are all sealed by glue.

In order to achieve the above object, an embodiment of the present invention also proposes an electronic device, the electronic device includes a speaker module, and the speaker module includes:

a shell, the shell has an inner cavity;

The technical solution of the present invention adopts an elastic air-permeable spacer, which is arranged on the speaker unit and isolates the sound-absorbing particles. At this time, due to the elasticity of the ventilation spacer, when the stretch cover is set on the speaker unit, the ventilation spacer does not need to match the structure of the speaker unit or the leakage hole, and can be directly stretched and installed, which is convenient for assembly and is suitable for different The structure of the speaker module. Moreover, after the sound-absorbing particles are filled, the air-permeable spacer will be squeezed, so that the air-permeable spacer will be deformed to the side of the speaker unit, so that the air-permeable spacer and the back of the speaker unit will form a good fit, that is, the air-permeable spacer and the speaker unit will be in good contact. The back adapts to a better shape, so that the increase in the physical volume of the rear acoustic cavity caused by the irregular back of the speaker unit is converted into an increase in the physical volume of the filling cavity, and the increase in the filling volume of the sound-absorbing particles is achieved, thereby making the speaker module Acoustic performance is improved.

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 an exploded diagram of an embodiment of the loudspeaker module of the present invention;

Fig. 2 is a sectional view of the loudspeaker module in Fig. 1;

Fig. 3 is the enlarged view of place A in Fig. 2;

Fig. 4 is an enlarged view of the first housing in Fig. 1;

Fig. 5 is an enlarged view of another viewing angle of the speaker unit in Fig. 1;

Fig. 6 is an enlarged view of the gas-permeable spacer in Fig. 1 .

Explanation of reference numbers:

标号label	名称 name	标号label		名称name
100100	扬声器模组 speaker module	3030	扬声器单体speaker unit

1010	外壳 shell	30a 30a		泄漏孔leak hole
10a10a	前声腔front vocal cavity	3131	盆架 Basin frame
10b 10b		后声腔back cavity	3333	导磁板 Magnetic plate
1111	第一壳体 first shell	5050	透气隔离件 Breathable Parts
111111	底板 Bottom plate	5151	中心部 Center
11111111	安装面 Mounting surface	5353	周缘部 Peripheral part
113113	侧板 side panels	531531	首端 head end
115115	框体 framework	533533	尾端 tail end
1313	第二壳体 second shell	7070	柔性电路板flexible circuit board

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 description

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 also changes accordingly.

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 the description of the present invention, "several" means at least two, such as two, three, etc., unless otherwise specifically defined.

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, the technical solutions of the various embodiments of the present invention 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 as a combination of technical solutions. Does not exist, nor is it within the scope of protection required by the present invention.

Aiming at the technical problems mentioned in the background art, the present invention proposes a loudspeaker module, aiming at improving the acoustic performance of the loudspeaker module.

It can be understood that the speaker module proposed by the present invention can be applied to electronic equipment, and electronic equipment can be but not limited to mobile phones, notebook computers, tablet computers, personal digital assistants (Personal Digital Assistant, PDA), e-book readers, MP3 (Moving Picture Experts Compression Standard Audio Layer 3, Moving Picture Experts Group Audio Layer III) player, MP4 (Moving Picture Experts Compression Standard Audio Layer 4, Moving Picture Experts Group Audio Layer IV) player, wearable device, navigator, Handheld game consoles, virtual and reality devices, augmented reality devices, etc.

The specific structure of the loudspeaker module proposed by the present invention will be described below in specific embodiments:

As shown in Figures 1 to 4, in an embodiment of the speaker module 100 of the present invention, the speaker module 100 includes a housing 10, a speaker unit 30 and a ventilating spacer 50; the housing 10 has an inner cavity; the speaker unit 30 It is located in the inner cavity and is surrounded by the shell 10 to form a rear acoustic cavity 10b. The speaker unit 30 is provided with a leakage hole 30a; the ventilating spacer 50 is an elastic member, and the ventilating spacer 50 is stretched and set on the speaker unit 30 And cover the leakage hole 30a, the rear acoustic cavity 10b is filled with sound-absorbing particles, and the air-permeable spacer 50 is used to isolate the sound-absorbing particles from entering the leakage hole 30a.

In this embodiment, the housing 10 includes a first shell 11 and a second shell 13 that cover each other. The first shell 11 and the second shell 13 jointly enclose the inner cavity of the outer shell 10 , and the inner cavity of the outer shell 10 It is used to accommodate the internal components of the speaker module 100 , such as the speaker unit 30 , the air-permeable spacer 50 , the flexible circuit board 70 , sound-absorbing particles, and the like. It should be noted that, in practical application, the first housing 11 and the second housing 13 can be metal parts at the same time, combined by laser welding; they can also be plastic parts at the same time, using ultrasonic welding Combined together; it is also possible to combine one metal part and the other plastic part by means of adhesive connection. Moreover, the periphery of the joint position of the first housing 11 and the second housing 13 can also be surrounded by a seal, and the seal is sealingly connected to the first housing 11 and the second housing 13, so as to improve the sealing performance of the housing 10, for The internal components of the speaker module 100 provide a more independent and safer working environment, and provide a good structural basis for the improvement of the acoustic performance of the speaker module 100 .

The loudspeaker unit 30 is assembled in the first housing 11, specifically: the first housing 11 includes a bottom plate 111 and a side plate 113 protruding from one side surface of the bottom plate 111, and the side plate 113 is arranged around the periphery of the bottom plate 111, An end of the side plate 113 facing away from the bottom plate 111 is combined with the second housing 13 to make the first housing 11 and the second housing 13 fixedly connected. The first casing 11 also includes a frame body 115, which is protrudingly arranged on the surface of the bottom plate 111 provided with the side plate 113, and is located inside the side plate 113; around the speaker unit 30. That is, the frame body 115 is arranged around, and the spatial shape inside the frame body 115 is adapted to the shape of the front part of the speaker unit 30, and the front part of the speaker unit 30 is inserted in the frame body 115, so that the inside of the frame body 115 The space is closed to form the front acoustic cavity 10a; at this time, the remaining part of the inner cavity of the housing 10 forms the rear acoustic cavity 10b.

The air-permeable spacer 50 is assembled in the first housing 11, and has dual functions—isolation function and air-breathing function. The isolation function of the air-permeable spacer 50 means that the air-permeable spacer 50 will divide the rear acoustic cavity 10b into a filling cavity and an isolation cavity. The filling cavity is used to fill the sound-absorbing particles, and the isolation cavity is used to isolate the leakage hole 30a on the speaker unit 30 communicating with the rear acoustic cavity 10b from the sound-absorbing particles, so that the sound-absorbing particles cannot enter it. The ventilation function of the air-permeable spacer 50 means that although the sound-absorbing particles cannot pass through the air-permeable spacer 50 , the airflow can pass through the air-permeable spacer 50 to interact with the sound-absorbing particles.

It can be understood that in the rear acoustic cavity 10b of the speaker module 100, the back of the speaker unit 30 generally does not present a regular planar shape (as shown in FIG. , such as leakage holes 30a, etc.), so that the physical volume of the rear acoustic cavity 10b can be increased. However, in the existing method of isolating sound-absorbing particles through mesh components, it is difficult to convert this increased physical volume into the filling volume of sound-absorbing particles, resulting in waste of space and insufficient performance improvement. The fundamental reason is that the existing mesh assembly generally consists of two parts, the support and the mesh, and the mesh needs to rely on the support of the support to be installed and fixed in the rear acoustic cavity 10b; however, the support is generally thin and narrow. The ring structure, under the premise of ensuring the stability of the mesh cloth fixed on the support, and under the premise of ensuring the convenience of the mesh cloth being assembled on the support and the support being fixed in the rear acoustic cavity 10b, the support is difficult to adopt Due to the irregular structure, it cannot be well adapted to the back of the speaker unit 30 .

Facing such shortcomings, the technical solution of this embodiment adopts an elastic air-permeable spacer 50 , which covers the speaker unit 30 and isolates the sound-absorbing particles. At this time, since the air-permeable spacer 50 has elasticity, when its stretch cover is arranged on the speaker unit 30, the ventilated spacer 50 does not need to match the structure of the speaker unit 30 or the leakage hole 30a, and can be directly stretched and installed, greatly improving Save assembly process. Moreover, the elastic air-permeable spacer 50 is suitable for different speaker module 100 structures, and has a wider application range. Further, after the sound-absorbing particles are filled, the air-permeable spacer 50 will be squeezed, causing the air-permeable spacer 50 to deform toward the speaker unit 30, so that the air-permeable spacer 50 and the back of the speaker unit 30 form a good fit, that is, Obtain a shape that better fits the back of the speaker unit 30, thereby converting the increase in the physical volume of the rear acoustic cavity 10b caused by the irregularity of the back of the speaker unit 30 into an increase in the physical volume of the filling cavity, and realizing the filling volume of sound-absorbing particles The increase of the acoustic performance of the speaker module 100 is improved.

It should also be noted that the back of the speaker unit 30 is relative to the front of the speaker unit 30 , the two are located opposite to each other, and are respectively arranged towards the front and rear of the speaker unit 30 . Generally, a diaphragm is provided at the front of the speaker unit 30 for radiating sound waves to the front of the speaker unit 30 ; Specifically, as shown in Figure 5, the loudspeaker unit 30 includes a frame 31 and a magnetically conductive plate 33, the magnetically conductive plate 33 is covered on the back of the frame 31, and the magnetically conductive plate 33 is formed with gaps at its four corners, so that The structure enclosed by the frame 31 and the magnetically conductive plate 33 forms a leakage hole 30a at the four corners of its back.

In addition, it can be understood that a filling hole is also provided on the casing, through which the sound-absorbing particles can be filled to maximize filling. Moreover, the speaker module 100 may also include a flexible circuit board 70, one end of the flexible circuit board 70 may be electrically connected to the speaker unit 30 by welding, and the other end may be exposed to the outer surface of the housing 10 for communication with other devices. Or module electrical connection.

In an embodiment of the speaker module 100 of the present invention, the air-permeable spacer 50 is a waterproof air-permeable film. It should be noted that waterproof and breathable membrane, also known as breathing paper, is a new type of polymer waterproof material, which has good waterproof, dustproof, breathable, elastic and other properties.

Optionally, the waterproof and breathable membrane is at least one of polyurethane waterproof and breathable membrane, thermoplastic polyurethane waterproof and breathable membrane, and polytetrafluoroethylene waterproof and breathable membrane. It should be noted that, in addition to the above-mentioned good waterproof, dustproof, breathable, elastic and other properties, the polyurethane waterproof and breathable membrane also has the characteristics of high elasticity, transparency and visibility, and antibacterial; the thermoplastic polyurethane waterproof and breathable membrane also has high tension, Excellent mechanical properties such as high tensile strength and toughness, as well as aging resistance and environmental protection; PTFE waterproof and breathable membrane also has high temperature resistance (working temperature up to 250 ° C), low temperature resistance (good mechanical toughness, even if the temperature It can also maintain 5% elongation when it drops to -196°C), corrosion resistance (it is inert to most chemicals, such as being able to resist strong acids and alkalis and most organic solvents), weather resistance (with better Aging life), high lubrication (the existence of low friction coefficient in solid materials), non-adhesion (the existence of small surface tension in solid materials, not easy to adhere to substances), non-toxic (physiologically inert, can be used as Artificial blood vessels and organs have been implanted in the body for a long time without adverse reactions).

As shown in Figures 1 to 4, in an embodiment of the speaker module 100 of the present invention, the inner cavity wall of the housing 10 has a mounting surface 1111, the mounting surface 1111 is provided with a frame body 115, and the speaker unit 30 is arranged on the frame In the body 115, it is used to close the space inside the frame body 115 to form the front acoustic cavity 10a;

The air-permeable spacer 50 covers the back of the speaker unit 30 , and the periphery of the air-permeable spacer 50 is fixed to the frame body 115 .

It should be noted that the installation surface 1111 in this embodiment is the inner surface of the bottom plate 111 of the first housing 11 in the previous embodiments. Therefore, the arrangement of the frame body 115 on the installation surface 1111 in this embodiment is basically the same as the arrangement of the frame body 115 on the surface of the bottom plate 111 provided with the side plate 113 in the previous embodiment, and will not be repeated here.

It can be understood that fixing the periphery of the air-permeable spacer 50 to the frame body 115 can not only realize the position limitation of the periphery of the air-permeable spacer 50, but also realize the fixing of the air-permeable spacer 50 in the rear acoustic cavity 10b; and the structure is simple and the assembly is quick, Excellent stability and reliability. Moreover, it is also equivalent to forming an "all-round covering" for the speaker unit 30, thereby improving the sealing performance of the filling cavity for the sound-absorbing particles, reducing the risk of the sound-absorbing particles going to the side of the speaker unit 30, and reducing the risk of the speaker module. 100 probability that the acoustic performance is affected, and the acoustic performance of the speaker module 100 is improved.

As shown in FIGS. 1 to 3 and 6, in an embodiment of the speaker module 100 of the present invention, the air-permeable spacer 50 includes a central portion 51 and a peripheral portion 53 extending along the periphery of the central portion 51. The central portion 51 covers Located on the back of the speaker unit 30 , the peripheral portion 53 extends along the surrounding direction of the frame body 115 and is fixed on an end surface of the frame body 115 away from the mounting surface 1111 .

It can be understood that fixing the peripheral portion 53 of the air-permeable spacer 50 on the end face of the frame body 115 facing away from the installation surface 1111 can not only make use of the supporting function of the frame body 115 to realize the installation and fixation of the air-permeable spacer 50 more quickly; It is beneficial to utilize the area sandwiched by the side of the speaker unit 30 and the end surface of the frame body 115 facing away from the installation surface 1111 to further increase the filling volume of the sound-absorbing particles and improve the acoustic performance of the speaker module 100 .

As shown in FIG. 1 to FIG. 3 and FIG. 6 , in an embodiment of the speaker module 100 of the present invention, the peripheral portion 53 protrudes outward from the periphery of the central portion 51 . In this way, not only is it convenient to install and fix the peripheral portion 53 of the air-permeable spacer 50 on the end face of the frame body 115 facing away from the mounting surface 1111, but also the direction of the pulling force produced by the central portion 51 on the peripheral portion 53 after fixing is consistent with the direction of the frame body 115 away from the mounting surface. The angle between the end faces of 1111 is closer to vertical, thereby reducing the risk of "tearing" the joint position of the breathable spacer 50 and the frame body 115, improving the installation stability of the breathable spacer 50, and ensuring that the filling cavity is Closeness of sound-absorbing particles.

On the other hand, the design that the peripheral portion 53 protrudes outward from the periphery of the central portion 51 is also beneficial to the area sandwiched by the side of the speaker unit 30 and the end surface of the frame body 115 away from the mounting surface 1111 when filling the sound-absorbing particles. encroachment, which is beneficial to increase the filling volume of the sound-absorbing particles and improve the acoustic performance of the speaker module 100 .

In an embodiment of the speaker module 100 of the present invention, the peripheral portion 53 and the frame body 115 are hot-melt or adhesively connected. Wherein, in the way of hot-melt connection, the frame body 115 can be pre-configured as a frame body 115 with hot-melt performance, and then the peripheral portion 53 of the air-permeable spacer 50 is placed on the end surface of the frame body 115 away from the installation surface 1111, The peripheral portion 53 of the air-permeable spacer 50 and the frame body 115 are hot-melt-sealed using a hot-melt connection process. In the way of adhesive connection, adhesives such as glue or double-sided tape can be coated on the end surface of the frame body 115 facing away from the installation surface 1111 in advance, and then the peripheral portion 53 of the air-permeable spacer 50 is installed away from the frame body 115. The end surface of the surface 1111 is bonded and compressed, and the pressure is relaxed after a period of time, so that a tight connection can be formed between the peripheral portion 53 of the air-permeable spacer 50 and the frame body 115 .

In the actual application process, the glue can be epoxy glue, white latex, ultraviolet light curing glue, etc.

In an embodiment of the speaker module 100 of the present invention, the speaker module 100 further includes a support member extending along the extending direction of the peripheral portion 53 and disposed on the surface of the peripheral portion 53 away from or close to the frame body 115 .

It can be understood that since the support member can support the gas-permeable spacer 50, before the peripheral part 53 of the gas-permeable spacer 50 is connected to the frame body 115, the peripheral part 53 of the gas-permeable spacer 50 can be fixed in advance. Place the support, and then assemble the air-permeable spacer 50 and the support to the designated position by “handling” the support, so that the peripheral portion 53 of the air-permeable spacer 50 is fixed. At this time, the assembly of the air-permeable spacer 50 will be simpler and more convenient. At the same time, because the peripheral portion 53 of the air-permeable spacer 50 is fixed in advance, it can maintain the most suitable shape with the frame body 115, thereby facilitating the formation of the air-permeable spacer 50 with the frame body 115. Bond more fully to form a stronger connection.

In the actual application process, the connection between the peripheral portion 53 of the ventilating spacer 50 and the support can be realized by adhesive connection, specifically, glue, double-sided tape or other adhesives can be used, and epoxy glue can be used for the glue. , white latex, UV curing glue, etc. When the supporting member is arranged on the surface of the peripheral edge portion 53 close to the frame body 115, it is equivalent to that the peripheral edge portion 53 is fixed to the frame body 115 through the supporting member; at this time, the connection mode between the supporting member and the frame body 115 can be adhesively connected. To achieve, glue, double-sided tape or other adhesives can be used specifically. The glue can be epoxy glue, white latex, ultraviolet light curing glue, etc.

Moreover, regarding the material of the support, optionally, the support is any one of foam, steel sheet, and PET sheet.

As shown in FIGS. 1 to 6 , in an embodiment of the speaker module 100 of the present invention, the head end 531 and the tail end 533 of the peripheral portion 53 are arranged at intervals to form an escape position between the central portion 51 and the frame body 115 ;

The loudspeaker module 100 also includes a flexible circuit board 70 , the flexible circuit board 70 is installed in the avoidance position, and is electrically connected with the loudspeaker unit 30 ;

The gap between the central part 51 and the flexible circuit board 70 , the gap between the peripheral part 53 and the flexible circuit board 70 , and the gap between the frame body 115 and the flexible circuit board 70 are all sealed by glue.

Understandably, using glue to seal the circumferential gap of the flexible circuit board 70 can improve the sealing of the filling cavity to the sound-absorbing particles on the one hand, reduce the risk of the sound-absorbing particles going to the side of the speaker unit 30, and reduce the risk of the speaker module 100. The possibility of affecting the acoustic performance can improve the acoustic performance of the speaker module 100; on the other hand, it can also play a role in limiting the position of the flexible circuit board 70, improve the stability of the flexible electrical board, and improve the flexibility of the flexible circuit board 70. The stability of the electrical connection with the speaker unit 30 improves the stability of the electrical connection between the speaker module 100 and the outside. At the same time, because the glue has a certain fluidity, it can seal the gap between the speaker unit 30 and the frame 115 to a certain extent while sealing the gap in the circumferential direction of the flexible circuit board 70, and improve the sealing of the rear acoustic cavity 10b. performance, and improve the acoustic performance of the speaker module 100.

It should be noted that the glue can be epoxy glue, white latex, UV curing glue, etc.

The present invention also proposes an electronic device, which includes the aforementioned speaker module 100 , and for the specific structure of the speaker module 100 , refer to the foregoing embodiments. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by all the technical solutions of all the above-mentioned embodiments, which will not be repeated here.

Understandably, the electronic device can be, but is not limited to, a mobile phone, a notebook computer, a tablet computer, a personal digital assistant (Personal Digital Assistant, PDA), an e-book reader, an MP3 (Moving Picture Experts Compression Standard Audio Level 3, Moving Picture Experts Group Audio Layer III) player, MP4 (Moving Picture Experts Group Audio Layer IV) player, wearable device, navigator, handheld game console, virtual and reality equipment, augmented reality equipment, etc. .

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

A speaker module (100), characterized in that it comprises:

a housing (10) having an inner cavity;

A loudspeaker unit (30), the loudspeaker unit (30) is arranged in the inner cavity, and is enclosed with the outer shell (10) to form a rear acoustic cavity (10b), and the loudspeaker unit (30) is provided with has a leak hole (30a); and

A breathable spacer (50), the breathable spacer (50) is an elastic member, and the breathable spacer (50) is stretched and set on the speaker unit (30) and covers the leakage hole (30a) , the rear acoustic cavity (10b) is filled with sound-absorbing particles, and the air-permeable spacer (50) is used to isolate the sound-absorbing particles from entering the leakage hole (30a).
The speaker module (100) according to claim 1, characterized in that the air-permeable spacer (50) is a waterproof air-permeable membrane.
The speaker module (100) according to claim 2, characterized in that the waterproof and breathable membrane is at least one of a polyurethane waterproof and breathable membrane, a thermoplastic polyurethane waterproof and breathable membrane, and a polytetrafluoroethylene waterproof and breathable membrane.
The loudspeaker module (100) according to claim 1, characterized in that, the inner cavity wall of the housing (10) has a mounting surface (1111), and the mounting surface (1111) is protruded with a frame (115 ), the loudspeaker unit (30) is arranged in the frame (115) for closing the space inside the frame (115) to form a front acoustic cavity (10a);

The air-permeable spacer (50) is covered on the back of the speaker unit (30), and the periphery of the air-permeable spacer (50) is fixed to the frame (115).
The speaker module (100) according to claim 4, characterized in that, the air-permeable spacer (50) comprises a central portion (51) and a peripheral portion (53) extending along the peripheral edge of the central portion (51) ), the central part (51) is covered on the back of the speaker unit (30), the peripheral part (53) extends along the surrounding direction of the frame (115), and is fixed to the frame The end surface of the body (115) facing away from the mounting surface (1111).
The loudspeaker module (100) according to claim 5, characterized in that, the peripheral portion (53) is thermally melted or glued to the frame (115).
The speaker module (100) according to claim 5, characterized in that, the speaker module (100) further comprises a support member, the support member is extended along the extending direction of the peripheral portion (53), and It is arranged on the surface of the peripheral portion (53) away from or close to the frame body (115).
The loudspeaker module (100) according to claim 7, characterized in that, the support member is any one of foam, steel sheet and PET sheet.
The loudspeaker module (100) according to claim 5, characterized in that, the head end (531) and the tail end (533) of the peripheral part (53) are arranged at intervals, so that the central part (51) and the An avoidance position is formed between the frames (115);

The speaker module (100) further includes a flexible circuit board (70), the flexible circuit board (70) is installed in the avoidance position, and is electrically connected with the speaker unit (30);

The gap between the central part (51) and the flexible circuit board (70), the gap between the peripheral part (53) and the flexible circuit board (70), the frame (115) and The gaps between the flexible circuit boards (70) are all sealed by glue.
An electronic device, characterized by comprising the speaker module (100) according to any one of claims 1-9.