CN107820195B

CN107820195B - Manufacturing method of sound production device module and sound production device module

Info

Publication number: CN107820195B
Application number: CN201710936610.6A
Authority: CN
Inventors: 李振军; 高远; 李承伟; 陈钢
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2017-10-10
Filing date: 2017-10-10
Publication date: 2021-02-12
Anticipated expiration: 2037-10-10
Also published as: CN107820195A

Abstract

The invention discloses a manufacturing method of a sound generating device module and the sound generating device module, wherein the manufacturing method of the sound generating device module comprises the following steps: providing a module shell of the sound generating device module, wherein a front cavity, a resonant cavity and a resonant cavity channel are arranged in the module shell, a sound outlet communicated with the outside is formed in the module shell, the front cavity is communicated with the sound outlet, and the front cavity is communicated with the resonant cavity through the resonant cavity channel; a porous mesh is injection molded within the resonant cavity channel. The invention achieves the technical effect that the porous net can be arranged in the resonant cavity channel. The damping in the resonant cavity channel can be increased, and the effect of reducing the FR of the sound generating device module is achieved.

Description

Manufacturing method of sound production device module and sound production device module

Technical Field

The invention belongs to the technical field of sound-electricity transduction, and particularly relates to a manufacturing method of a sound generating device module and the sound generating device module.

Background

The sound generating device module is an important acoustic device of modern electronic equipment, is used for completing the conversion between an electric signal and an acoustic signal, and is an energy conversion device; along with the gradual development of electronic products, the technology of the sound generating device module is also gradually improved, and the requirements of the electronic products on performance and structure are met. The loudspeaker is widely applied to electronic equipment, such as a loudspeaker of a mobile electronic terminal of a mobile phone, an interphone, a notebook computer and the like.

Reproduction is a technology in which a front chamber in a sound generating device module is generally used for generating sound and transmitting the sound to the outside. However, with the continuous change of the market, the requirements of people on the sound quality, namely the requirements on the service performance of the sound generating device module, are higher and higher. The demand for equipment is also becoming more and more miniaturized. The manufacturers of the sound generating device module are driven to continuously improve the technology, and the service performance of the sound generating device module is improved. The structure of the sound generating device module is improved usually, the volume of the rear cavity is increased as much as possible, and the structure of the front cavity is changed. However, such modifications to the housing often require modification of the mold, increasing the cost of the manufacturing facility. Therefore, how to adjust the acoustic performance of the sound generating device module to improve the sound quality thereof is a technical problem faced by those skilled in the art. On the basis, the skilled person needs to consider how to improve the sound quality without increasing the cost of the enterprise.

Disclosure of Invention

One object of the present invention is to provide a method for manufacturing a sound generating device module.

According to a first aspect of the present invention, there is provided a method of manufacturing a sound emitting device module, comprising:

providing a module shell of the sound generating device module, wherein a front cavity, a resonant cavity and a resonant cavity channel are arranged in the module shell, a sound outlet communicated with the outside is formed in the module shell, the front cavity is communicated with the sound outlet, and the front cavity is communicated with the resonant cavity through the resonant cavity channel;

a porous mesh is injection molded within the resonant cavity channel.

Optionally, the method further comprises: the module shell is composed of a plurality of shells, wherein at least two shells are respectively provided with a part of resonant cavity channels, and the at least two shells are buckled to form the resonant cavity channels.

Optionally, the method further comprises: and injecting a porous mesh on one part of the resonant cavity channel of the at least two shells, and then buckling to form the resonant cavity channel.

Optionally, the method further comprises: the module shell is composed of a plurality of shells, wherein at least two shells are respectively provided with a partial resonant cavity, and the at least two shells are buckled to form the resonant cavity.

Optionally, the method further comprises: the porous network is perpendicular to the channel direction of the resonant cavity channels.

Optionally, wherein the porous mesh does not enclose the resonant cavity channels.

Optionally, wherein the porous mesh is a breathable mesh or a porous plastic.

According to another aspect of the present invention, there is also provided a sound generating device module, including a module housing, the module housing having a front cavity, a resonant cavity and a resonant cavity channel therein, the module housing having a sound outlet communicating with the outside, the front cavity communicating with the sound outlet, the front cavity communicating with the resonant cavity through the resonant cavity channel, and a porous mesh disposed in the resonant cavity channel.

Optionally, the sound generating device module still includes the sound generating device monomer, has in the module casing and holds the chamber, and the sound generating device monomer is located it will to hold the intracavity hold the chamber and separate for antechamber and back chamber.

Optionally, the porous mesh does not enclose the resonant cavity channels.

According to one embodiment of the present disclosure, one technical effect of the present invention is that a porous mesh can be provided within the resonant cavity channel. The damping in the resonant cavity channel can be increased, and the effect of reducing the FR of the sound generating device module is achieved.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic plan view of one embodiment of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;

FIG. 3 is an enlarged partial schematic view at B in FIG. 2;

FIG. 4 is a schematic perspective view of an embodiment of the present invention;

FIG. 5 is an enlarged partial schematic view at C of FIG. 4;

fig. 6 is an exploded view of a structure according to an embodiment of the present invention.

In the figure: the sound-emitting device comprises a module shell 1, a first shell 11, a second shell 12, a third shell 13, a sound outlet 14, a module upper shell 15, a module rear cover 16, a front cavity 2, a resonant cavity 3, a resonant cavity channel 4, a porous mesh 5, a channel direction 6, a sound-emitting device monomer 7, a diaphragm component 71 and a magnetic circuit component 72.

Detailed Description

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

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

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

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The invention provides a manufacturing method of a sound generating device module, which can arrange a porous net in a resonant cavity channel. The damping in the resonant cavity channel can be increased, and the effect of reducing the FR of the sound generating device module is achieved. In addition, when adjusting the performance of sound generating mechanism module, also can not need to carry out the structural adjustment to the casing of sound generating mechanism module, reduce the cost of enterprise as far as.

The invention provides a manufacturing method of a sound generating device module, which comprises the following steps:

a module housing 1 of a sound generating device module in an embodiment as shown in fig. 1-3 is provided. The module housing has a front chamber 2, a resonance chamber 3 and a resonance chamber channel 4. The module case 1 has a sound outlet 14 communicating with the outside, such as the sound outlet 14 shown in fig. 4. Front chamber 2 and sound outlet 14 intercommunication for the sound generating mechanism module is at the during operation, and sound can pass through the outside of sound outlet transmission to the sound generating mechanism module. The front cavity 2 is communicated with the resonant cavity 3 through a resonant cavity channel 4; the resonant cavity 3 is a closed structure communicated with the front cavity 2;

a porous mesh 5 is injection molded within the resonant cavity channel 4. The porous net can be a unidirectional porous material, can also be a material which is similar to foam, honeycomb, porous plastic and the like, has a certain geometric dimension, has a regular or irregular multi-channel structure inside, has a porous net structure, can meet the injection molding requirement, and can be designed by a person skilled in the art according to the requirement. The porous net 5 may be one position as shown in fig. 3, or may be a plurality of porous nets 5 of the same or different shapes, which is not limited in the present application. A resonant cavity 3 is arranged in the sound generating device module and is communicated with the front cavity 2 through a resonant cavity channel 4. When the sound generating device module works, sound is transmitted into the resonant cavity 3 from the front cavity, the sound passes through the resonant cavity channel 4, the sound in the resonant cavity channel 4 can reciprocate like a piston under the action of sound pressure, and certain sound quality is achieved. The resonance chamber 3 is similar to an air spring and has a certain acoustic compliance. When the frequency of the sound wave is the same as the natural frequency of the resonance chamber 3, resonance occurs. At and near the resonant frequency, the speed of vibration of the sound is maximized, the more acoustic energy is consumed, and the more sound is attenuated at that frequency. By arranging the porous mesh 5 on the resonant cavity channel 4, the damping, namely the acoustic resistance, in the resonant cavity channel 4 can be increased, and the FR of the sound generating device module can be obviously further reduced and the acoustic performance of the sound generating device module can be improved when the resonant cavity structure in the sound generating device module is fixed. Meanwhile, the porous mesh 5 is produced by injection molding, so that high-efficiency industrial production can be realized, and automatic feeding is realized. Moreover, under the condition of a certain resonant cavity structure, the acoustic performance of the sound generating device module can be adjusted by changing the injection-molded porous mesh 5, the operation is simple, and before injection molding, the material for injection molding, the specific shape and size of the injection-molded porous mesh or the specific position of the injection-molded porous mesh in the resonant cavity channel can be set according to the performance requirement of the sound generating device module, for example, as shown in fig. 3, the cross section of the porous mesh 5 is rectangular and is located at the position of the resonant cavity channel 4 close to the communication with the front cavity 2. When adjusting its acoustic performance, need not carry out the structure adjustment to the grinding apparatus of module shell, just also further reduced the manufacturing cost of enterprise.

Optionally, the method further comprises: the module shell is composed of a plurality of shells. At least two of the shells are respectively provided with a part of resonant cavity channels. And buckling the at least two shells to form the resonant cavity channel. The module case 1, as shown in fig. 3-5, includes a first case 11 and a second case 12. The first housing 11 and the second housing 12 each have a part of the resonant cavity channel 4, which together form the resonant cavity channel 4. Then during installation, the first housing 11 and the second housing 12 are snapped together to form the resonant cavity channel 4. The first housing 11 and the second housing 12 can be fastened together in a sealing manner by clamping, welding, bonding, or the like.

Optionally, the method further comprises: and injecting a porous mesh on one part of the resonant cavity channel of the at least two shells, and then buckling to form the resonant cavity channel. The module case 1, as shown in fig. 3-5, includes a first case 11 and a second case 12. In the manufacturing process, the porous mesh 5 can be formed on the first housing by injection molding, and then the second housing 12 is fastened to the first housing, so that the process of injecting the porous mesh 5 into the resonant cavity channel 4 is more convenient and simpler.

Optionally, the method further comprises: the module shell is composed of a plurality of shells, wherein at least two shells are respectively provided with a partial resonant cavity, and the at least two shells are buckled to form the resonant cavity. The module case 1, as shown in fig. 3, includes a first case 11 and a third case 13. The first housing 11 and the third housing 13 each have a part of the resonant cavity 3, which together form the resonant cavity 3. Then, during the installation process, the first housing 11 and the third housing 13 are buckled to form the resonant cavity 3. The first housing 11 and the third housing 13 can be fastened and connected in a sealing manner by clamping, welding, bonding, and the like. It will also be understood by those skilled in the art that the resonance chamber 3 does not necessarily need to be disposed on at least two housings, and in other embodiments, the resonance chamber 3 may be disposed in the first housing 11 separately, or it may be understood that the first housing 11 and the third housing 13 are integrally formed, which may also be realized. The manufacturing difficulty of the die, the manufacturing difficulty of the module housing 1 and the manufacturing process in the production can be simplified by separating the two parts, so that the technical characteristics are not limited to the invention and are only a specific embodiment of the invention.

Optionally, the method further comprises: the porous network is perpendicular to the channel direction of the resonant cavity channels. As shown in fig. 1-5, the porous mesh 5 is perpendicular to the channel direction 6 of the channels 4 of the resonant cavity. The channel direction 6 is shown in the embodiment for illustrative purposes only to facilitate understanding of the present invention by those skilled in the art, and is not a specific structure in the embodiment. The channel direction 6, i.e. the sound transmission direction. Porous network 5 sets up with 6 verticals of passageway direction for when the geometric dimension of porous network 5 is fixed time, can with the biggest area of contact that the sound on the passageway direction 6 was got, increase damping that can be better improves the acoustic resistance, improves the acoustic performance of sound generating mechanism module, reduces FR.

Optionally, the porous mesh does not enclose the resonant cavity channels. As shown in fig. 3, the porous mesh 5 does not enclose the resonator channels 4, providing an open space for more sound to pass into the resonator. On the other hand, the relationship between the space between the porous mesh 5 and the channel of the resonant cavity channel 4 and the resonant cavity channel 4 is also the same as the relationship between the resonant cavity channel 4 and the resonant cavity 3, and the space and the resonant cavity channel form a channel from big to small, and the connection relationship is in a convex shape or a hollow L shape and the like from big to small. Belongs to an improvement on the structure of a resonant cavity. Thereby further reducing the FR of the sound generator module from the structure and the properties of the porous web 5 itself.

Optionally, the porous mesh is a breathable mesh or a porous plastic. The production is more convenient, the raw materials are relatively cheap, and the production cost of enterprises can be reduced.

The invention also provides a sound generating device module, as shown in fig. 1-3, comprising a module housing 1. The module housing 1 has a front chamber 2, a resonance chamber 3 and a resonance chamber channel 4 therein. The module case 1 has a sound outlet 14 communicating with the outside, such as the sound outlet 14 in the embodiment shown in fig. 4. The front chamber 2 communicates with the sound outlet 14. The front chamber 2 communicates with the resonance chamber 3 through the resonance chamber passage 4. Within the resonator chamber channel 4 is disposed a porous mesh 5. The damping in the resonant cavity channel 4 can be increased, and the effect of reducing the FR of the sound generating device module is achieved.

Optionally, as shown in fig. 1 to 6, the sound generating device module further includes a single sound generating device 7, the single sound generating device 7 includes a diaphragm assembly 71 and a magnetic circuit assembly 72, and the diaphragm assembly 71 of the single sound generating device 7 is configured to generate sound when the sound generating device module is in operation. The module case 1 has a receiving chamber therein. The single sound generating device 7 is positioned in the containing cavity and divides the containing cavity into a front cavity 2 and a rear cavity. Wherein the front face of the diaphragm assembly 71 is communicated with the front cavity 2, the emitted sound can enter the accommodating cavity 3 to reduce FR, and the acoustic performance of the loudspeaker module is improved. The back of the diaphragm assembly 72 communicates with the back chamber.

Alternatively, as one embodiment shown in fig. 6, the module case 1 includes a first case 11, a module upper case 15, and a module rear cover 16. The module upper case 15 can be fastened to the first housing 11 to seal the first housing 11 at a time. The space between the modular upper case 15 and the sound emitting device unit 7 in the first housing 11 constitutes the front chamber 2. The module rear cover 16 is fastened to the other side of the first housing 11, and forms a rear chamber with the space between the first housing 11. In order to improve the stable in structure of the sound generating device module, the module rear cover 16 provides a supporting effect for the sound generating device module, can be made of metal, such as stainless steel sheets and the like, and can effectively reduce the thickness of the rear cover while ensuring the supporting strength, finally can increase the volume of the rear cavity and improve the service performance of the sound generating device module.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A method of manufacturing a sound generator module, comprising:

injection molding into a porous network within the resonant cavity channel;

the porous mesh does not enclose the resonant cavity channels.

2. The manufacturing method according to claim 1, further comprising: the module shell is composed of a plurality of shells, wherein at least two shells are respectively provided with a part of resonant cavity channels, and the at least two shells are buckled to form the resonant cavity channels.

3. The manufacturing method according to claim 2, further comprising: and injecting a porous mesh on one part of the resonant cavity channel of the at least two shells, and then buckling to form the resonant cavity channel.

4. The manufacturing method according to claim 1, further comprising: the module shell is composed of a plurality of shells, wherein at least two shells are respectively provided with a partial resonant cavity, and the at least two shells are buckled to form the resonant cavity.

5. The manufacturing method according to claim 1, further comprising: the porous network is perpendicular to the channel direction of the resonant cavity channels.

6. The method of any one of claims 1 to 5, wherein the porous web is a breathable mesh or a porous plastic.

7. A sound generating device module is characterized by comprising a module shell, wherein a front cavity, a resonant cavity and a resonant cavity channel are arranged in the module shell, a sound outlet communicated with the outside is formed in the module shell, the front cavity is communicated with the sound outlet, the front cavity is communicated with the resonant cavity through the resonant cavity channel, and a porous net is arranged in the resonant cavity channel;

the porous mesh does not enclose the resonant cavity channels.

8. The sound generating device module set of claim 7, further comprising a sound generating device unit, wherein the housing has a receiving cavity therein, and the sound generating device unit is located in the receiving cavity to separate the receiving cavity into a front cavity and a rear cavity.