WO2018218766A1

WO2018218766A1 - Loudspeaker module and electronic device

Info

Publication number: WO2018218766A1
Application number: PCT/CN2017/094161
Authority: WO
Inventors: 周树芝; 郝正恩
Original assignee: 歌尔股份有限公司
Priority date: 2017-05-31
Filing date: 2017-07-24
Publication date: 2018-12-06
Also published as: CN207070324U

Abstract

A loudspeaker module and an electronic device. The module comprises a module housing and a loudspeaker unit (13); a cavity is provided inside the module housing, and the loudspeaker unit (13) is provided in the cavity; the loudspeaker unit (13) divides the cavity into a front sound cavity (20) and a rear sound cavity (21); inner core sound holes (14) of the loudspeaker unit (13) are in communication with the rear sound cavity (21); the module further comprises a shielding portion which is configured to partially or entirely shield the inner core sound holes (14). A technical problem to be solved is that the size of the inner core sound holes (14) of an existing loudspeaker module is fixed and cannot be adjusted according to loudspeaker modules of different models. The size of the inner core sound holes (14) is adjusted by means of the shielding portion, so that the same loudspeaker unit (13) can be applied to different loudspeaker modules, simplifying the design process of the loudspeaker unit (13) and improving the universality of the loudspeaker unit (13).

Description

Speaker module and electronic device

Technical field

The present application relates to the field of electroacoustic conversion technology, and more particularly, to a speaker module and an electronic device.

Background technique

The speaker module is an important acoustic device of portable electronic devices, which is used to complete the conversion between electrical signals and acoustic signals, and is an energy conversion device. Existing speaker modules typically include a housing. A speaker unit is housed in the housing. The speaker unit separates the cavity of the entire module into a front cavity and a rear cavity. Wherein, the speaker unit is disposed in the front sound cavity, and the speaker unit has a retaining wall around the periphery. The retaining wall is used to position the speaker unit and avoids the formation of the kernel sound hole.

One end of the core sound hole communicates with the gap between the diaphragm and the magnetic circuit system, that is, the inner side of the diaphragm, and the other end communicates with the rear sound chamber. A pressure relief hole is arranged on the module housing, and the pressure relief hole is connected with the rear sound chamber. When vibrating, the air pressure inside the diaphragm can be balanced with the outside through the inner core sound hole, the rear sound chamber, and the pressure relief hole.

However, under normal circumstances, the aperture size of the kernel sound hole is fixed. This does not change the size of the aperture according to different speaker modules. Users need to design different sizes of kernel sound holes according to different speaker modules.

In addition, since the aperture of the core sound hole is fixed in size, it is impossible to adjust the sound effect of the speaker module by adjusting the size of the core sound hole.

Summary of the invention

One object of the present application is a new technical solution for a speaker module.

According to one aspect of the present application, a speaker module is provided. The module includes a module housing and a speaker unit, and a cavity is disposed inside the module housing, the speaker unit is disposed in the cavity, and the speaker unit is configured to be the cavity The body is divided into a front sound chamber and a rear sound chamber. The inner sound hole of the speaker unit is in communication with the rear acoustic cavity; and further includes a shielding portion configured to partially or completely occlude the inner core sound hole.

Optionally, the inner core sound hole is opposite to the rear acoustic cavity, and the shielding portion includes a retaining wall for fixing the speaker unit, and the retaining wall is disposed in the front acoustic cavity and the rear acoustic cavity. The shielding portion further includes a convex portion extending from the retaining wall, the convex portion corresponding to the inner sound hole.

Optionally, the barrier wall is disposed between the front acoustic cavity and the rear acoustic cavity.

Optionally, the retaining wall and the boss are integrally injection molded with the module housing.

Optionally, the retaining wall is integrally injection molded with the module housing, and the protrusion is injection molded on the retaining wall as an insert.

Optionally, the module housing includes an upper shell and a lower shell that are fastened together, and a front acoustic cavity is formed between the speaker unit and the upper casing, and the retaining wall and the convex portion are disposed Inside the upper casing.

Optionally, a sealant is applied in the gap between the raised portion and the outer surface of the speaker unit.

Optionally, the shielding portion comprises a heat resistant tape attached at an exit of the sound hole of the inner core.

Optionally, the sound chamber is filled with a sound absorbing material.

According to another aspect of the present application, an electronic device is provided. The electronic device includes the speaker module provided by the present application.

One technical effect of the present application is that the shielding portion can partially or completely block the sound hole of the core. In this way, the shielding portion can correct the cross-sectional area of the sound hole of the core and adjust the sound effect of the speaker module.

In addition, the shielding portion can reduce the cross-sectional area of the sound hole of the core, reduce low-frequency distortion, and improve the margin of listening.

In addition, the arrangement of the shielding portion can improve the acoustic resistance of the speaker unit, thereby reducing the amplitude of the diaphragm and reducing the noise generated by the speaker module.

In addition, by providing a shielding portion, the speaker module can adopt a higher power speaker unit, which improves the sound quality of the speaker module.

In addition, the shielding area of the core sound hole is adjusted by the shielding portion, so that the same speaker unit can be applied to different speaker modules without setting the core sound hole for each speaker module, simplifying the design process of the speaker unit. Increases the versatility of the speaker unit.

Other features and advantages of the present application will become apparent from the following detailed description of the exemplary embodiments.

DRAWINGS

The accompanying drawings, which are incorporated in FIG

1 is an exploded view of a speaker module in accordance with one embodiment of the present application.

2 is an assembled view of an upper casing and a speaker unit in accordance with an embodiment of the present application.

3 is a cross-sectional view of a speaker module in accordance with an embodiment of the present application.

Figure 4 is a partial enlarged view of a portion A in Figure 3.

Description of the reference signs:

11: upper shell; 12: lower shell; 13: speaker unit; 14: inner core sound hole; 15: pressure relief hole; 16: damping member; 19: FPC; 20: front sound chamber; 21: rear sound chamber; Wall; 23: raised portion.

detailed description

Various exemplary embodiments of the present application 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 application.

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

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

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, therefore, one Once an item is defined in a drawing, it is not required to be further discussed in subsequent figures.

According to one embodiment of the present application, a speaker module is provided. The module includes a module housing and a speaker unit 13 as shown in FIG. For example, the speaker unit 13 is a moving coil type unit or a moving iron type unit.

For convenience of explanation, a moving coil type single body is taken as an example in this embodiment. The moving coil type unit includes a vibration component and a magnetic circuit component. The vibrating assembly includes a diaphragm and a voice coil, and the diaphragm is connected to the voice coil. The magnetic circuit assembly is used to form a magnetic gap. There is an alternating magnetic field in the magnetic gap, and one end of the voice coil is inserted into the magnetic gap.

Preferably, as shown in FIG. 1, an FPC 19 is disposed on the module housing, and the lead of the voice coil is electrically connected to the FPC 19. The leads are electrically connected to an external circuit through the FPC 19.

A cavity is provided inside the module housing. The speaker unit 13 is placed in the cavity. The diaphragm of the speaker unit 13 separates the cavity into a front acoustic chamber 20 and a rear acoustic chamber 21. For example, the front acoustic chamber 20 is opposed to the outer side of the diaphragm, and the outer side is the side away from the magnetic circuit assembly of the speaker unit. The front acoustic cavity 20 has an acoustic hole (not shown). The speaker module makes a sound through the sound hole.

Preferably, the sound hole passes through from the side of the module housing. This structure constitutes a side sound speaker module. The side-sounding speaker module is thinner in thickness and has a small footprint when installed.

The inner core sound hole 14 of the speaker unit 13 is in communication with the rear sound chamber 21. Specifically, the rear acoustic cavity 21 communicates with the inner side of the diaphragm through the inner core sound hole 14, and the inner side is near the side of the magnetic circuit assembly of the speaker unit. A pressure relief hole 15 communicating with the rear sound chamber 21 is disposed on the module housing. When vibrating, the airflow inside the diaphragm is depressurized via the inner core sound hole 14, the rear sound chamber 21, and the pressure relief hole 15 to balance the internal and external pressure of the diaphragm.

Preferably, a damper member 16 is provided outside the pressure relief hole 15, which is capable of damping the vibrational airflow and preventing external dust from entering.

The rear acoustic cavity 21 provides a buffer zone for the vibrating airflow. Moreover, the rear acoustic cavity 21 can adjust the low frequency effect of the speaker module.

Preferably, the sound chamber 21 is filled with a sound absorbing material. The sound absorbing material can increase the virtual space of the rear sound chamber 21, so that the speaker module can obtain a good low frequency effect without expanding the volume of the speaker module.

In this embodiment, the speaker module further includes a shielding portion. The obscuration portion is configured to partially or completely occlude the inner core sound hole 14.

In the speaker module of the embodiment of the present application, the shielding portion can partially or completely block the core sound hole 14. In this way, the shielding portion can correct the size of the cross-sectional area of the core sound hole 14 and adjust the sound effect of the speaker module.

In addition, the shielding portion can reduce the cross-sectional area of the core sound hole 14, reduce low-frequency distortion, and improve the margin of listening.

In addition, the arrangement of the shielding portion can improve the acoustic resistance of the speaker unit 13, thereby reducing the amplitude of the diaphragm and reducing the noise generated by the speaker module.

In addition, by providing a shielding portion, the speaker module can adopt a higher power speaker unit 13, which improves the sound quality of the speaker module.

In addition, the shielding area of the core sound hole 14 is adjusted by the shielding portion, so that the same speaker unit 13 can be applied to different speaker modules without setting the core sound hole 14 for each speaker module, simplifying the speaker unit. The design process of 13 improves the versatility of the speaker unit 13.

In one example, as shown in Figures 1-2, the speaker module has a flat structure. The module housing includes an upper case 11 and a lower case 12 that are fastened together. In this way, the disassembly and assembly of the speaker unit 13 is more convenient.

Preferably, the inner core sound hole 14 is opposite the rear sound chamber 21. The shielding portion includes a blocking wall 22 that is disposed between the front acoustic cavity 20 and the rear acoustic cavity 21. This method facilitates the setting of the retaining wall. The shield also includes a raised portion 23 that extends from the barrier wall 22. The raised portion 23 corresponds to the inner core sound hole 14.

For example, as shown in FIG. 1, two core sound holes 14 are juxtaposed on the speaker unit 13, and the two core sound holes 14 are spaced apart. The core sound hole 14 is directly disposed opposite to the rear sound chamber 21. As shown in FIGS. 3-4, the barrier wall 22 is disposed between the front acoustic cavity 20 and the rear acoustic cavity 21. The raised portion 23 is located above the barrier wall 22. The raised portions 23 are in one-to-one correspondence with the inner core sound holes 14 to occlude the inner core sound holes 14, respectively. In order to make the shielding effect of the convex portion 23 better, the convex portion 23 should be as close as possible to the inner core sound hole 14. The boss portion 23 has a feature of good shielding effect.

Further, since the retaining wall 22 is disposed between the front acoustic chamber 20 and the rear acoustic chamber 21, the retaining wall 22 It also functions to position the speaker unit 13.

Those skilled in the art can set the number and height of the bosses 23 according to actual needs to adjust the acoustic resistance of the speaker unit 13.

Preferably, the retaining wall 22 and the boss portion 23 are integrally injection molded with the module housing. In this way, the formation of the retaining wall 22 and the boss portion 23 becomes easy, and the connection strength between the retaining wall 22 and the boss portion 23 and the module housing is higher.

It is also possible that the retaining wall 22 is integrally injection molded with the module housing. The raised portion 23 is injection molded as an insert onto the retaining wall 22. In this way, the processing steps can also be simplified, and the strength of the connection between the retaining wall 22, the boss 23 and the module housing can be increased.

In one example, as shown in FIG. 1, both the front acoustic chamber 20 and the rear acoustic chamber 21 have a flat structure, and the rear acoustic chamber 21 is disposed around the speaker unit 13. In this way, the thickness of the speaker module is smaller, which is in line with the trend of thinning and thinning of electronic products.

Preferably, as shown in FIG. 1, the retaining wall 22 and the boss portion 23 are disposed in the upper casing 11. The lower case 12 is a cover plate. When assembling, the user can first place the speaker unit 13 above the front sound chamber 20, so that the barrier wall 33 partially or completely blocks the inner core sound hole 22; nextly, the lower shell 12 is directly fastened to the upper shell 11, the speaker mold The assembly of the group is very convenient. In this way, the degree of integration of the upper casing 11 is improved.

After the speaker unit 13 is loaded into the casing (for example, the upper casing 11), there is inevitably a gap between the boss portion 23 and the outer surface of the speaker unit 13. When vibrating, the airflow passes through the gap, so that the shielding effect of the boss portion 23 is deteriorated. In order to solve the technical problem, a sealant is applied in a gap between the boss portion 23 and the outer surface of the speaker unit 13. The manner of applying the sealant can effectively prevent the airflow from passing through the gap, so that the shielding effect of the boss portion 23 is good.

Those skilled in the art can seal the gap by using a sealant commonly used in the art according to actual needs.

In other examples, the obscuring portion includes a heat resistant tape.

A heat resistant tape is attached to the exit of the core sound hole 14. For example, the user bonds the heat resistant tape to the exit of the core sound hole 14 by an adhesive. The heat-resistant tape takes up a small volume and is easy to attach.

Heat resistant tape has good heat resistance. When the speaker unit 13 is working for a long time, it is resistant The thermal tape maintains its structural shape to ensure a occlusion effect.

According to another aspect of the present application, an electronic device is provided. For example, the electronic device can be, but is not limited to, a VR device, an AR device, a mobile phone, a computer, a gaming machine, a walkie-talkie, and the like. The electronic device includes the speaker module provided by the present application.

The electronic device has the characteristics of good sound effect.

Although the specific embodiments of the present application have been described in detail by way of example, those skilled in the art should understand that the above examples are only for the purpose of illustration and not limitation. 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 application. The scope of the application is defined by the appended claims.

Claims

A speaker module, comprising: a module housing and a speaker unit (13), a cavity is disposed inside the module housing, and the speaker unit (13) is disposed in the In the cavity, the speaker unit (13) separates the cavity into a front acoustic cavity (20) and a rear acoustic cavity (21), the inner sound hole (14) of the speaker unit (13) and the rear The acoustic cavity (21) is in communication; further comprising a shield configured to partially or fully occlude the inner core sound hole (14).
The speaker module according to claim 1, wherein the inner core sound hole (14) is opposite to the rear sound chamber (21), and the shielding portion includes a retaining wall for fixing the speaker unit ( 22) the barrier wall (22) is disposed between the front acoustic cavity (20) and the rear acoustic cavity (21);

The shielding portion further includes a convex portion (23) extending from the retaining wall (22), the convex portion (23) corresponding to the inner core sound hole (14).
A speaker module according to claim 1 or 2, wherein said barrier wall (22) is disposed between said front acoustic chamber (20) and said rear acoustic chamber (21).
The speaker module according to any one of claims 1 to 3, characterized in that the retaining wall (22) and the boss (23) are integrally injection molded with the module housing.
The speaker module according to any one of claims 1 to 4, wherein the barrier wall (22) is integrally injection molded with the module housing, and the convex portion (23) is embedded The piece is injection molded on the retaining wall (22).
The speaker module according to any one of claims 1 to 5, wherein the module housing comprises an upper case (11) and a lower case (12) that are fastened together, the speaker list Forming a front acoustic cavity (20) between the body (13) and the upper casing (11), the retaining wall (22) and the The boss (23) is disposed in the upper case (11).
A speaker module according to any one of claims 1 to 6, wherein a coating is applied in a gap between the boss (23) and an outer surface of the speaker unit (13) Sealant.
The speaker module according to any one of claims 1 to 7, wherein the shielding portion comprises a heat resistant tape,

The heat resistant tape is attached at the exit of the inner core sound hole (14).
A speaker module according to any one of claims 1-8, characterized in that the sound chamber (21) is filled with a sound absorbing material.
An electronic device comprising the speaker module according to any one of claims 1-9.