WO2021135132A1

WO2021135132A1 - Sound production apparatus and electronic device

Info

Publication number: WO2021135132A1
Application number: PCT/CN2020/099540
Authority: WO
Inventors: 牛家鹏; 孙志军; 牟宗君
Original assignee: 歌尔股份有限公司
Priority date: 2019-12-31
Filing date: 2020-06-30
Publication date: 2021-07-08
Also published as: CN111131942A

Abstract

Disclosed are a sound production apparatus and an electronic device. The sound production apparatus comprises: a shell, opposite sides of the shell being provided with a front sound cavity and a rear sound cavity respectively; and a loudspeaker unit, the loudspeaker unit being fixed to the shell, and a sound outlet end of the loudspeaker unit being in communication with the front sound cavity. A leakage structure is arranged on the shell, and the leakage structure comprises a resistant acoustic cavity spaced from the rear sound cavity, a first leakage hole enabling the rear sound cavity and the resistant acoustic cavity to be in communication, and a second leakage hole enabling the resistant acoustic cavity and the front sound cavity to be in communication. According to the technical solution of the present invention, airflow disturbance noise at the leakage structure on the sound production apparatus can be reduced, the symmetry of the vibration displacement of a product is improved, and the acoustic performance of the product is improved.

Description

Sound device and electronic equipment

Technical field

The present invention relates to the technical field of electroacoustic equipment, in particular to a sound generating device and electronic equipment.

Background technique

For a common sound generating device, it usually includes a housing and a speaker unit arranged on the housing, and the opposite sides of the housing are respectively a front acoustic cavity and a rear acoustic cavity. The shell is usually provided with a leakage hole for communicating the rear acoustic cavity and the front acoustic cavity. However, the airflow disturbance noise will be generated at the leakage hole, which will affect the symmetry of the vibration displacement of the product, which will cause users to be unable to satisfy the stability of the product's acoustic performance.

Summary of the invention

The main purpose of the present invention is to provide a sounding device, which aims to reduce the airflow disturbance noise at the leakage structure on the sounding device, improve the symmetry of the vibration displacement of the product, and thereby improve the acoustic performance of the product.

In order to achieve the above objective, the sound generating device proposed by the present invention includes:

A housing, the opposite sides of the housing are respectively a front acoustic cavity and a rear acoustic cavity; and

A speaker unit, the speaker unit being fixed to the housing, and the sound output end of the speaker unit is in communication with the front sound cavity;

A leakage structure is provided on the housing, and the leakage structure includes a resistive anechoic cavity separated from the rear acoustic cavity, a first leakage hole that communicates the rear acoustic cavity and the resistive anechoic cavity, and the The second leakage hole of the resistant muffler cavity and the front acoustic cavity.

Optionally, the first leakage hole and/or the second leakage hole are covered with a damping mesh.

Optionally, the damping mesh is located in the resistant muffler cavity.

Optionally, the housing has a first surface facing the rear acoustic cavity, the housing is provided with the second leakage hole, and the first surface is provided with a peripheral ring surrounding the second leakage hole. A ring-shaped cavity piece, one end of the ring-shaped cavity piece away from the housing is provided with a cavity cover, the resistant muffler cavity is the inner cavity of the ring-shaped cavity piece, and the cavity cover is provided There is the first leakage hole.

Optionally, the housing has a second surface facing the front acoustic cavity, the housing is provided with the first leakage hole, and the second surface is provided with a peripheral ring surrounding the first leakage hole. A ring-shaped cavity piece, one end of the ring-shaped cavity piece away from the housing is provided with a cavity cover, the resistant muffler cavity is the inner cavity of the ring-shaped cavity piece, and the cavity cover is provided There is the second leak hole.

Optionally, the ring-shaped cavity member is bonded to the housing; and/or, the cavity cover is bonded to the ring-shaped cavity member.

Optionally, the cavity cover is configured as a first adhesive-backed part; and/or, the annular cavity member is configured as a second adhesive-backed part.

Optionally, the housing has a first surface facing the rear acoustic cavity, and the housing is protrudingly formed with a resistive silencing sink recessed relative to the first surface toward the front acoustic cavity, and The second leakage hole is provided at the bottom of the resistant sound-absorbing sink, the inner cavity of the resistant sound-absorbing sink is the resistant sound-absorbing cavity, and the notch of the resistant sound-absorbing sink is provided with The cavity cover is provided with the first leakage hole.

Optionally, the housing has a second surface facing the front acoustic cavity, and the housing is protrudingly formed with a resistive silencing sink recessed relative to the second surface toward the rear acoustic cavity. The bottom of the resistant sound-absorbing sink is provided with the first leakage hole, the inner cavity of the resistant sound-absorbing sink is the resistant sound-absorbing cavity, and the slot of the resistant sound-absorbing sink is provided with The cavity cover is provided with the second leakage hole.

The present invention also provides an electronic device, including the aforementioned sound emitting device.

The technical solution of the present invention is additionally provided with a resistant anechoic cavity, and the airflow enters the resistant anechoic cavity from the rear acoustic cavity through the first leakage hole, passes through the resistant anechoic cavity, and is discharged from the second leakage hole to the front acoustic cavity. In the process of air flow, passing through the first leakage hole from the rear acoustic cavity is the first cross-sectional abrupt change. After flowing through the resistant anechoic cavity, flowing out through the second leakage hole is the second cross-sectional abrupt change, that is, the entire airflow The flow process is a resistance silencing process with a sudden change in the pipe section. The resistance silencing cavity in the working process is connected to the rear and front acoustic cavities to form a resistance muffler with a sudden cross section, and the formed resistant muffler can resist the airflow. The disturbance noise is filtered to solve the problem of asymmetry of product vibration displacement, reduce the environmental noise generated by the product due to airflow disturbance, and improve the acoustic performance of the product.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on the structure shown in these drawings.

Fig. 1 is a schematic structural diagram of an embodiment of a sound generating device of the present invention;

Fig. 2 is a schematic structural diagram of another embodiment of a sound generating device of the present invention;

Fig. 3 is a schematic structural diagram of another embodiment of a sound generating device of the present invention;

FIG. 4 is a schematic structural diagram of still another embodiment of the sound generating device of the present invention.

Attached icon number description:

标号Label	名称 name	标号Label		名称name
1010	壳体 case	101101	后声腔 Back cavity
103103	抗性消声沉槽 Resistant Muffler Sinks	2020	泄露结构Leaked structure
201201	抗性消声腔Resistant anechoic chamber	202202	第一泄露孔 First leak hole
203203	第二泄露孔Second leak hole	21twenty one	腔盖Cavity cover
22twenty two	环状腔体件Annular cavity	23twenty three	第一背胶件The first adhesive piece
24twenty four	第二背胶件The second adhesive piece	3030	阻尼网布 Damping mesh
102102	前声腔Front vocal cavity	1111	第一表面 First surface
1212	第二表面Second surface	To	To

The realization of the objectives, functional characteristics and advantages of the present invention 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 a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain that it is in a specific posture (as shown in the drawings). If the specific posture changes, the relative positional relationship, movement, etc. of the components below will also change the directional indication accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and cannot be understood as instructions or implications Its relative importance or implicitly indicates the number of technical features indicated. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and/or" in the full text includes three parallel schemes. Taking "A and/or B" as an example, it includes scheme A, scheme B, or schemes that meet both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the protection scope of the present invention.

The present invention provides a sound generating device.

1, in an embodiment of the present invention, the sound generating device includes:

A housing 10, the opposite sides of the housing 10 are respectively a front acoustic cavity 102 and a rear acoustic cavity 101; and

A speaker unit (not shown), the speaker unit is fixed to the housing 10, and the output end of the speaker unit is in communication with the front sound cavity 102;

The housing 10 is provided with a leakage structure 20, which includes a resistant silencing cavity 201 separated from the rear acoustic cavity 101, a first leakage hole 202 that communicates with the rear acoustic cavity 101 and the resistant silencing cavity 201, and a connected resistant silencing cavity 201 The second leakage hole 203 of the acoustic cavity 201 and the front acoustic cavity 102.

In this embodiment, usually, the sound generating device is assembled on electronic equipment such as mobile phones and tablet computers. The equipment housings of these electronic devices usually have a mounting cavity for the sounding device. After the sounding device is assembled into the mounting cavity, the housing 10 and the speaker unit separate the mounting cavity into the front sound cavity 102 and the rear sound cavity. 101.

In the technical solution of the present invention, a resistant silencing cavity 201 is added. The airflow enters the resistant silencing cavity 201 from the rear acoustic cavity 101 through the first leakage hole 202, passes through the resistant silencing cavity 201 and then is discharged from the second leakage hole 203 to the front. Sound cavity 102. In the process of air flow, passing through the first leakage hole 202 from the rear acoustic cavity 101 is the first cross-sectional abrupt change. After flowing through the resistant anechoic cavity 201, flowing out through the second leakage hole 203 is the second cross-sectional abrupt change, that is, , The entire flow process of the airflow is a reactive muffler process with a sudden change in the cross section of the pipe. The connection between the resistant muffler 201 and the rear acoustic cavity 101 and the front acoustic cavity 102 during the working process forms a reactive muffler with abrupt cross section. The resistant muffler can filter the airflow disturbance noise, so as to solve the problem of the asymmetry of the product vibration displacement, reduce the product's environmental noise caused by the airflow disturbance, and then improve the product's acoustic performance.

Further, the first leakage hole 202 and/or the second leakage hole 203 is covered with a damping mesh 30. In this technical solution, due to the addition of the damping mesh 30, the formed resistant muffler can also adjust the damping characteristics of the acoustic cavity 101. In this way, even if the volume of the resistant muffler 201 is small, it can effectively reduce the airflow. Disturbing noise. It can be understood that the space of the sound device, especially the miniature sound device is limited, and the smaller resistant anechoic cavity 201 is more conducive to product realization.

Further, the damping mesh 30 is located in the resistant muffler cavity 201. It can be understood that the space for installing the sound device on the electronic equipment is usually small, and the damping mesh 30 is arranged in the resistant anechoic cavity 201 to avoid the occupation of the external space of the sound device on the electronic equipment by the damping mesh 30. It should be noted that, in the present invention, the total thickness of the damping mesh 30 is smaller than the thickness of the resistant anechoic cavity 201 to ensure that the resistant anechoic cavity 201 has enough space to filter the airflow disturbance noise.

1, in this embodiment, further, the housing 10 has a first surface 11 facing the rear acoustic cavity 101 and a second surface 12 facing the front acoustic cavity 102, and the housing 10 is provided with the second leakage hole 203 , The first surface 11 of the housing 10 is provided with a ring-shaped cavity member 22 ringed around the outer periphery of the second leakage hole 203, and an end of the ring-shaped cavity member 22 away from the housing 10 is provided with a cavity cover 21. The resistant muffler cavity 201 is the inner cavity of the annular cavity member 22, and the first leakage hole 202 is provided on the cavity cover 21. In this embodiment, the resistant silencing cavity 201 is formed by adding a ring-shaped cavity member 22. It can be understood that the annular cavity member 22 is an independent component relative to the housing 10. On the one hand, it can be easily molded, and it can be, but not limited to, injection molded parts, die-cast parts, cutting parts, etc.; on the other hand, the annular cavity There are more choices for the material selection of the body 22, which can choose a material with a lower cost than the material of the housing 10, and/or choose a material that is more conducive to resisting noise reduction (such as but not limited to sound absorption). Material) and so on.

However, the present design is not limited to this. Referring to FIG. 2, FIG. 2 is a schematic structural diagram of another embodiment of a sound generating device of the present invention. In this other embodiment, the first leakage hole 202 may also be opened on the housing 10. The annular cavity member 22 is arranged on the second surface 12 of the housing 10 and is arranged around the outer periphery of the first leakage hole 202. The resistant muffler cavity 201 is the inner cavity of the annular cavity member 22. The second leakage hole is provided on the cavity cover 21 of the end of the annular cavity member 22 far away from the housing 10; obviously, in this other embodiment, it is also formed by adding the annular cavity member 22 The resistant muffler cavity 201.

Further, the ring-shaped cavity member 22 is bonded to the housing 10; and/or, the cavity cover 21 is bonded to the ring-shaped cavity member 22. It can be understood that the bonding connection mode is easy to operate and realize, which is beneficial to improve the ease of assembly between related components. Generally, related parts can be bonded by double-sided tape, adhesive tape, etc. However, the present design is not limited to this. In other embodiments, the gap between the ring-shaped cavity member 22 and the housing 10, and between the cavity cover 21 and the ring-shaped cavity member 22 can also be but not limited to the method of melting and pressing. Connect; of course, in other embodiments, the annular cavity member 22 and the cavity cover 21 can also be integrally formed.

Further, the cavity cover 21 is configured as a first adhesive backing member 23; and/or, the annular cavity member 22 is configured as a second adhesive backing member 24. Among them, the second adhesive part 24 adopts double-sided adhesive; the first adhesive part 23 can adopt single-sided adhesive, of course, it can also adopt double-sided adhesive. In particular, when the first adhesive part 23 deviates from A damping mesh cloth 30 time is provided on one side of the resistant muffler cavity 201. It can be understood that the adhesive part has its own adhesiveness, and there is no need to apply additional adhesive, which can save the related production process of applying adhesive, simplify the production process of the product, and improve the production efficiency of the product. 1 and 2, the leakage hole on the first adhesive piece 23 is covered with a damping mesh 30; the first adhesive piece 23 has certain rigidity and strength, and can support the damping mesh 30. In addition, the first adhesive part 23 has its own adhesiveness, and the damping mesh 30 can be directly bonded to it.

In the technical solutions of FIGS. 1 and 2, the resistant anechoic cavity 201 is formed by adding a ring-shaped cavity member 22. However, the present design is not limited to this. In other embodiments, the resistant anechoic cavity The molding of 201 can also be directly integrally molded on the housing 10.

For example, referring to FIG. 3, FIG. 3 is a schematic structural diagram of another embodiment of the sound generating device of the present invention; in this still another embodiment, the housing 10 is protrudingly formed toward the front acoustic cavity 102 with a countersunk to the first surface 11 of the housing 10. The second leakage hole 203 is provided at the bottom of the resistant silencing sink 103, and the inner cavity of the resistant silencing sink 103 is the resistant silencing cavity 201 , The slot of the resistant sound-absorbing sink 103 is provided with a cavity cover 21, and the cavity cover 21 is provided with the first leakage hole 202. In another embodiment, the housing 10 is a thin-walled shell, the groove depth of the resistant muffler groove 103 is greater than the thickness of the housing 10, and the resistant muffler groove 103 is the wall of the housing 10 facing the front acoustic cavity 102 protruding molding. Of course, in other embodiments, when the shell wall of the shell 10 is thick enough, the groove depth of the resistant muffler sink 103 is smaller than the shell thickness of the shell 10. In this case, the shell wall of the shell 10 There is no need to protrude toward the front acoustic cavity 102, and the resistant sound-absorbing sink 103 can be formed on the first surface 11 of the housing 10 by means of milling or grooving. Of course, the housing 10 can also be an injection molded part, and the resistant sound-absorbing sink 103 is directly injection molded on the first surface 11 of the housing 10.

For another example, refer to FIG. 4, which is a schematic structural diagram of still another embodiment of the sound generating device of the present invention; in this still another embodiment, the resistant sound-absorbing sink 103 can also be provided so that the housing 10 protrudes toward the rear acoustic cavity 101 Suppose a formed sink groove sunk opposite to the second surface 12 of the housing 10, the first leakage hole 202 is provided at the bottom of the resistant noise attenuation sink 103, and the inner cavity of the resistant noise attenuation sink 103 is In the resistant silencing chamber 201, the slot of the resistant silencing sink 103 is provided with a cavity cover 21, and the second leakage hole 203 is provided on the cavity cover 21. Similarly, in this still another embodiment, when the housing 10 is a thin-walled shell and the groove depth of the resistant muffler groove 103 is greater than the thickness of the housing 10, the resistant muffler groove 103 is a shell The shell wall of the body 10 is protrudingly formed toward the rear acoustic cavity 101.

The present invention also provides an electronic device that includes a sounding device. The specific structure of the sounding device refers to the above-mentioned embodiments. Since this electronic device adopts all the technical solutions of all the above-mentioned embodiments, it has at least the technology of the above-mentioned embodiments. All the beneficial effects brought by the scheme will not be repeated here.

The above descriptions are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. Under the inventive concept of the present invention, equivalent structural transformations made by using the contents of the description and drawings of the present invention, or direct/indirect use Other related technical fields are included in the scope of patent protection of the present invention.

Claims

A sound generating device, characterized in that it comprises:

A housing, the opposite sides of the housing are respectively a front acoustic cavity and a rear acoustic cavity; and

A speaker unit, the speaker unit being fixed to the housing, and the sound output end of the speaker unit is in communication with the front sound cavity;

A leakage structure is provided on the housing, and the leakage structure includes a resistive anechoic cavity separated from the rear acoustic cavity, a first leakage hole that communicates the rear acoustic cavity and the resistive anechoic cavity, and the The second leakage hole of the resistant muffler cavity and the front acoustic cavity.
The sound generating device according to claim 1, wherein the first leakage hole and/or the second leakage hole are covered with a damping mesh.
3. The sound emitting device of claim 2, wherein the damping mesh is located in the resistant silencing cavity.
The sound generating device according to claim 1, wherein the housing has a first surface facing the rear acoustic cavity, the housing is provided with the second leakage hole, and the first surface is provided with a ring A ring-shaped cavity member provided on the outer periphery of the second leakage hole, an end of the ring-shaped cavity member away from the housing is provided with a cavity cover, and the resistant muffler cavity is the ring-shaped cavity member The inner cavity of the cavity cover is provided with the first leakage hole.
The sound emitting device of claim 1, wherein the housing has a second surface facing the front acoustic cavity, the housing is provided with the first leakage hole, and the second surface is provided with a ring A ring-shaped cavity member provided on the outer periphery of the first leakage hole, an end of the ring-shaped cavity member away from the housing is provided with a cavity cover, and the resistant muffler cavity is the ring-shaped cavity member The cavity cover is provided with the second leakage hole.
The sound generating device according to claim 4 or 5, wherein the ring-shaped cavity member is bonded to the housing; and/or, the cavity cover is bonded to the ring-shaped cavity member.
7. The sound generating device according to claim 6, wherein the cavity cover is configured as a first adhesive backing part; and/or, the annular cavity member is configured as a second backing adhesive part.
The sound emitting device according to claim 1, wherein the housing has a first surface facing the rear acoustic cavity, and the housing is convexly formed toward the front acoustic cavity and formed to be recessed relative to the first surface. The resistant silencing sink, the bottom of the resistant silencing sink is provided with the second leakage hole, the inner cavity of the resistant silencing sink is the resistant silencing cavity, and the resistant silencing sink is provided with the second leakage hole. The notch of the sex silencing sink is provided with a cavity cover, and the cavity cover is provided with the first leakage hole.
The sound emitting device of claim 1, wherein the housing has a second surface facing the front acoustic cavity, and the housing is protrudingly formed toward the rear acoustic cavity to be recessed relative to the second surface. The resistant silencing sink, the bottom of the resistant silencing sink is provided with the first leakage hole, the inner cavity of the resistant silencing sink is the resistant silencing cavity, the A cavity cover is arranged on the notch of the sex silencing sink, and the second leakage hole is arranged on the cavity cover.
An electronic device, characterized by comprising the sound emitting device according to any one of claims 1 to 9.