WO2018196132A1

WO2018196132A1 - Loudspeaker module and electronic device

Info

Publication number: WO2018196132A1
Application number: PCT/CN2017/089140
Authority: WO
Inventors: 赵国栋; 平康; 王国福; 杨鑫峰
Original assignee: 歌尔股份有限公司
Priority date: 2017-04-24
Filing date: 2017-06-20
Publication date: 2018-11-01
Also published as: CN106973348A; CN106973348B

Abstract

Provided are a loudspeaker module and an electronic device. The loudspeaker module comprises a module housing (100) and a loudspeaker unit (200), wherein the loudspeaker unit (200) is accommodated in the module housing (100), and a vibrating diaphragm (231) of the loudspeaker unit (200) divides an inner cavity of the module housing (100) into a rear sound cavity and a front sound cavity provided with sound outlet holes; the loudspeaker unit (200) is provided with two or more sound-leakage holes, and the two or more sound-leakage holes are in communication with the rear sound cavity; and the rear sound cavity comprises two or more chambers, and each of the chambers is in communication with part of the sound-leakage holes.

Description

Speaker module and electronic equipment

Technical field

The present invention relates to the field of electroacoustic products, and more particularly, to a speaker module and an electronic device.

Background technique

The speaker module comprises a module shell and a speaker unit housed in the module shell. The diaphragm of the speaker unit separates the inner cavity of the module shell into a front sound chamber and a rear sound chamber, wherein the front sound chamber has a sound hole. In order to make the speaker module sound through the front cavity.

The common problem of the existing speaker module is that there is a relatively obvious noise when outputting a single-frequency signal such as a piano music, thereby affecting the stability of the sound quality of the speaker module, and this problem has become a problem that the industry needs to focus on.

Summary of the invention

An object of the embodiments of the present invention is to provide a new technical solution of a speaker module to improve the noise phenomenon when outputting a single frequency signal such as a piano piece.

According to a first aspect of the present invention, a speaker module includes a module housing and a speaker unit, and the speaker unit is housed in the module housing, and the diaphragm of the speaker unit is The inner cavity of the module housing is divided into a rear acoustic cavity and a front acoustic cavity having an acoustic hole; the speaker unit has two or more leakage holes, and the two or more leakage holes are in communication with the rear acoustic cavity; The rear acoustic chamber includes more than two chambers, each of which communicates with a portion of the leak holes.

Optionally, the speaker unit includes a single housing and a magnetic circuit assembly mounted on the single housing, and at least one of the two or more leakage holes is formed in the single housing Between the magnetic circuit components.

Optionally, at least one of the two or more leak holes is disposed on a single housing of the speaker unit.

Optionally, the speaker unit includes a single housing and a magnetic circuit assembly mounted on the single housing, and at least one of the two or more leakage holes is disposed on the magnetic circuit assembly .

Optionally, the speaker unit has an even number of the leak holes, and the even number of the leak holes are symmetrically arranged with respect to at least one middle section of the diaphragm of the speaker unit.

Optionally, the speaker module includes a partition wall disposed in the rear sound chamber, the partition wall being configured to divide the rear sound chamber into the two or more chambers; the partition wall Formed integrally with the module housing.

Optionally, the speaker module includes a partition wall disposed in the rear sound chamber, the partition wall being configured to divide the rear sound chamber into the two or more chambers; the partition wall Made of sound absorbing material.

Optionally, the module housing is provided with a damping hole corresponding to the two or more chambers, and each of the chambers communicates with the outside through a corresponding damping hole.

Optionally, the two or more leak holes are arranged in one-to-one correspondence with the two or more chambers.

According to a second aspect of the present invention, there is also provided an electronic device provided with the speaker module according to the first aspect of the present invention.

An advantageous effect of the present invention is that the speaker module of the present invention divides the rear sound chamber into at least two chambers, and each chamber communicates only with a part of the leakage holes of the speaker unit, which can effectively reduce the passage of the speaker unit. The degree of collision of the airflow flowing out of different leak holes in the rear sound cavity improves the smoothness of the airflow, and effectively solves the problem of noise generated when the speaker module outputs a single-frequency signal such as piano sound.

Other features and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

DRAWINGS

The drawings incorporated in the specification and which form a part of the specification The examples, together with the description thereof, are used to explain the principles of the invention.

1 is a schematic overall structural view of a speaker module according to an embodiment of the present invention;

2 is a schematic structural view of a module housing that opens the speaker module of FIG. 1;

3 is a schematic exploded view of the speaker module of FIG. 1;

4 is a cross-sectional view of the speaker module of FIG. 1 at a position of a partition wall.

Description of the reference signs:

100-module casing; 110-module upper casing;

120-module lower case; 200-speaker unit;

210-monic front cover; 220-single outer casing;

230-vibration assembly; 231-diaphragm;

232-voice coil; 233-reinforcement;

260-magnetic circuit assembly; 261-guide yoke;

262-center magnet; 263-side magnet;

264-center magnetic conductive plate; 300-dust net;

400-foam; 500-partition wall.

detailed description

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in the embodiments are not intended to limit the scope of the invention unless otherwise specified.

The following description of the at least one exemplary embodiment is merely illustrative and is in no way

Techniques, methods and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but the techniques, methods and apparatus should be considered as part of the specification, where appropriate.

In all of the examples shown and discussed herein, any specific values are to be construed as illustrative only and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further in the subsequent figures. discuss.

1 to 4 are schematic structural views of a speaker module according to an embodiment of the present invention.

According to FIG. 1 to FIG. 4 , the speaker module of the present invention comprises a module housing 100 and a speaker unit 200 , and the speaker unit 200 is received in the inner cavity of the module housing 100 .

The speaker unit 200 may include a single housing 220, a magnetic circuit assembly 260, and a vibration assembly 230.

The vibration assembly 230 includes a diaphragm 231 and a voice coil 232.

The diaphragm 231 may include a central portion at the center, a folded portion surrounding the flat portion, and an edge portion surrounding the folded portion.

The edge portion of the diaphragm 231 is fixedly attached to the edge of the unit case 220, for example, by an adhesive means.

The voice coil 232 is fixedly coupled to the flat portion of the diaphragm 231 by, for example, an adhesive means, and the voice coil 232 and the unit casing 220 are located on the same side of the diaphragm 231.

The vibration assembly 230 may further include a reinforcing portion (DOME) 233 that is fixedly coupled to the flat portion of the diaphragm 231.

The reinforcing portion 233 and the voice coil 232 may be located on the same side of the diaphragm 231 or on different sides of the diaphragm 231.

The magnetic circuit assembly 260 is mounted on the single housing 220, and the voice coil 232 is placed in the magnetic gap of the magnetic circuit assembly 260 to vibrate under the action of the magnetic circuit assembly 260 upon receiving an audio signal (alternating signal). The diaphragm 231 incites the surrounding air to sound.

In this embodiment, as shown in FIGS. 3 and 4, the magnetic circuit assembly 260 may include a center magnet 262, a flat-shaped magnetic yoke 261, and an edge magnet 263. The center magnet 262 and the side magnet 263 are fixedly coupled to the surface of the yoke 261 facing the voice coil 232, and the side magnet 263 is disposed around the center magnet 262 to form the magnetic gap between the side magnet 263 and the center magnet 262.

Further, the magnetic circuit system 260 may further include a central magnetic conductive plate 264 disposed on a surface of the central magnet 262 facing the diaphragm 231 to function to correct magnetic lines of force.

Further, the magnetic circuit system 260 may further include an edge magnetic conductive plate disposed on a surface of the side magnet 263 facing the diaphragm 231 to function to correct magnetic lines of force.

In other embodiments, the magnetic circuit assembly 260 can also include a bowl-shaped yoke and a center magnetic The iron yoke further includes a flat plate portion and a side wall portion that is bent and extended toward the side of the voice coil 232 via the edge of the flat plate portion. The center magnet is fixedly attached to the surface of the flat plate portion facing the voice coil 232 by, for example, bonding, to form the magnetic gap between the side wall portion and the center magnet.

The speaker unit 200 may further include a unit front cover 210 to securely connect the diaphragm 231 between the unit housing 220 and the unit front cover 210.

The speaker unit 200 can also dispense with the single front cover 210, and can further protect the diaphragm 213 from the other side by the module housing 100.

After the speaker unit 200 is mounted in the inner cavity of the module housing 100, the diaphragm 231 of the speaker unit 200 separates the inner chamber into mutually independent front and rear acoustic chambers.

The single housing 220, voice coil 232, and magnetic circuit assembly 260 of the speaker unit 200 are all located in the rear acoustic cavity of the speaker module.

The module housing 100 has an acoustic hole communicating with the front acoustic cavity to sound through the sound hole.

According to FIG. 3 , the speaker module may further include a dustproof net 300 disposed on the module housing 100 and covering the sound hole of the module housing 100 .

Since the speaker unit 200 generates a large amount of heat during operation, the heat causes the gas in the rear sound chamber to expand, which in turn causes the air pressure in the rear sound chamber to rise, and the diaphragm is affected by the increase of the air pressure in the rear sound chamber. The phenomenon of up and down vibration asymmetry occurs, which in turn affects the normal operation of the speaker module. In order to balance the internal and external air pressure of the rear acoustic cavity of the speaker module, maintain the symmetry of the amplitude of the diaphragm 231, and thereby improve the acoustic performance, a damping hole communicating with the rear acoustic cavity may be disposed on the module housing 100, and on the speaker unit 200. Set the leak hole that communicates with the rear cavity.

The leak hole may be provided on the unit case 220 of the speaker unit 200.

The leak hole may also be provided on the magnetic circuit assembly 260 of the speaker unit 200. For example, it is disposed on the yoke 261 of the magnetic circuit assembly 260.

The leak hole may also be formed between the unit case 220 and the magnetic circuit assembly 260, that is, a leak hole is formed by a gap between the unit case 220 and the magnetic circuit assembly 260.

The speaker unit 200 can be provided with two or more (including two) leakage holes. After analysis, the airflow flowing out of the speaker unit 200 through different leakage holes will collide in the rear sound cavity, thereby causing airflow disorder, which is to a large extent. This causes the speaker module to have a noise when outputting a single-frequency signal such as a piano sound.

In order to solve this problem, in the embodiment of the present invention, the rear acoustic cavity of the speaker module includes two or more (including two) chambers, each of which communicates only with a portion of the leakage holes of the speaker unit 200. In this way, at least the degree of collision of the airflow flowing out of the different leakage holes of the speaker unit 200 in the rear sound cavity can be reduced, the smoothness of the airflow can be improved, and the problem of noise generated when the speaker module outputs a single-frequency signal such as piano sound can be effectively solved.

Illustratively, each chamber may be configured in one-to-one correspondence with the leak holes such that each chamber communicates with a leak hole. In this way, it is possible to prevent the airflow flowing out of the speaker unit 200 through different leakage holes from colliding in the rear sound cavity, thereby further improving the smoothness of the airflow, and more effectively solving the noise problem that occurs when the speaker module outputs a single-frequency signal such as a piano sound.

Illustratively, the speaker unit 200 can have an even number of leak holes.

In embodiments where the speaker unit 200 has an even number of leak holes, the even number of leak holes may be further symmetrically disposed about at least one mid-section of the diaphragm 231 to enhance the balancing of the gas flow.

In this embodiment, according to FIG. 2, the speaker unit 200 has four leak holes (not shown), and the rear sound chamber has four chambers 130, which are the first chamber 131 and the second chamber, respectively. 132. The third chamber 133 and the fourth chamber 134 each have a plurality of leak holes communicating with a chamber 130. For example, four leak holes may be located at the four corners of the speaker unit 200 such that the four leak holes are symmetrically arranged with respect to the two middle sections of the diaphragm 231.

The speaker unit 200 can also have an odd number of leak holes.

Each chamber of the rear acoustic chamber can have substantially the same volume or can be designed differently depending on the commissioning of acoustic performance.

The module housing 100 can be provided with a damping hole communicating with the outside for each chamber.

As shown in FIGS. 2 and 3, the speaker module includes a partition wall 500 disposed in the rear sound chamber to divide the rear sound chamber into two or more chambers 130 by the cooperation of the partition wall 500 and the unit housing 220.

The partition wall 500 can be integrally formed with the module housing 100.

The partition wall 500 can also be fixedly coupled to the module housing 100 by means of welding, bonding, or the like.

The module housing 100 can include a module upper case 110 and a module lower case 120 fixedly connected to the module upper case 110. The sound hole of the speaker module is disposed on the module upper case 110. In the In an embodiment, the partition wall 500 can be integrally formed with the module lower case 120, for example.

The partition wall 500 can be made of a sound absorbing material to also be able to adjust the sound quality through the partition wall 500. Thus, when the rear sound chamber is divided into two or more chambers by the partition wall 500, the volume of the rear sound chamber is not affected, and the airflow of the speaker unit 200 through the different leak holes can be mitigated or even prevented from colliding in the rear sound chamber. . In this embodiment, the partition wall 500 can be bonded, for example, to the rear acoustic cavity.

The sound absorbing materials are mostly loose porous materials such as slag wool, foam, silica, zeolite, sound absorbing cotton and the like. The sound absorption mechanism of the sound absorbing material is that the sound wave penetrates into the pores of the material, and the pores are mostly open pores which are mutually penetrated inside, and are subjected to the friction and viscous resistance of the air molecules, so that the fine fibers are mechanically vibrated, thereby converting the sound energy into heat energy. The sound absorption coefficient of such a porous sound absorbing material generally increases from low frequency to high frequency, so the sound absorption effect on high frequency and intermediate frequency is better.

As shown in FIGS. 3 and 4, the speaker module may further include a foam 400 that is laid between the speaker unit 200 and the module housing 100.

The various embodiments in the present specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other. Each embodiment focuses on differences from other embodiments, and each implementation The examples can be used alone or in combination with each other as needed.

While the invention has been described in detail with reference to the preferred embodiments of the present invention, it is understood that It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

A speaker module, comprising: a module housing and a speaker unit, wherein the speaker unit is received in the module housing, and a diaphragm of the speaker unit has a cavity of the module housing Separating into a rear acoustic cavity and a front acoustic cavity having an acoustic hole; the speaker unit has two or more leakage holes, and the two or more leakage holes are in communication with the rear acoustic cavity; the rear acoustic cavity includes two or more The chambers, each of the chambers being in communication with a portion of the leak holes.
The speaker module according to claim 1, wherein said speaker unit comprises a single housing and a magnetic circuit assembly mounted on said single housing, at least one of said two or more leakage holes A leak hole is formed between the unit case and the magnetic circuit assembly.
The speaker module according to claim 1 or 2, wherein at least one of the two or more leak holes is provided on a single casing of the speaker unit.
The speaker module according to any one of claims 1 to 3, wherein the speaker unit comprises a single housing and a magnetic circuit assembly mounted on the single housing, the two or more At least one of the leak holes is provided on the magnetic circuit assembly.
The speaker module according to any one of claims 1 to 4, wherein the speaker unit has an even number of the leak holes, and the even number of the leak holes are at least about the diaphragm A middle section is symmetrically arranged.
The speaker module according to any one of claims 1 to 5, wherein the speaker module comprises a partition wall disposed in the rear sound chamber, and the partition wall is configured to set the rear sound chamber Divided into comprising the two or more chambers; the partition wall is integrally formed with the module housing.
The speaker module according to any one of claims 1 to 6, wherein the speaker module comprises a partition wall disposed in the rear sound chamber, and the partition wall is configured to set the rear sound chamber Divided into including the two or more chambers; the partition wall is made of a sound absorbing material.
The speaker module according to any one of claims 1 to 7, wherein the module housing is provided with a damping hole corresponding to the two or more chambers, and each of the chambers Communicate with the outside through the corresponding orifice.
The speaker module according to any one of claims 1 to 8, characterized in that the two or more leak holes are arranged in one-to-one correspondence with the two or more chambers.
An electronic device characterized by being provided with the speaker module according to any one of claims 1-9.