WO2020220710A1

WO2020220710A1 - Speaker module

Info

Publication number: WO2020220710A1
Application number: PCT/CN2019/129011
Authority: WO
Inventors: 张庆一; 张明耀
Original assignee: 歌尔股份有限公司
Priority date: 2019-04-29
Filing date: 2019-12-27
Publication date: 2020-11-05
Also published as: CN209545851U

Abstract

The present invention discloses a speaker module, comprising a housing formed with a receiving cavity and a speaker unit contained in the receiving cavity; the speaker module comprises a conductive element and a limiting structure located in the rear acoustic cavity; the conductive element comprises a first body portion, a second body portion, and a third body portion that are sequentially formed by bending along the long axis direction; the first body portion comprises at least a welding portion for electrical connection with the speaker unit, the first body portion further comprises an extension portion extending from the edge of the section of the first body portion along the short axis direction; the extension portion is configured to abut against the limiting structure to limit the position of the welding portion on the first body portion from shifting. The speaker module provided by the present invention can effectively eliminate the problem that the position of the welding portion on the conductive element is easily shifted due to the large margin at the bending position of the conductive element, which results in poor welding quality and poor reliability of the welding portion.

Description

Speaker module

Technical field

The invention relates to the field of electroacoustic technology. More specifically, it relates to a speaker module.

Background technique

The speaker module is an important acoustic component of portable electronic equipment, used to complete the conversion between electrical signals and sound signals, and is an energy conversion device. The speaker module usually includes a housing, and a speaker unit is accommodated in the housing. The speaker unit divides the entire cavity of the module into a front sound cavity and a rear sound cavity that are isolated from each other. With the continuous development of electronic technology, portable electronic devices have become more and more powerful, and electronic devices have more and more components, so the space required is increasing. However, the volume of portable electronic devices is constantly being miniaturized, lighter and thinner. In order to adapt to this situation, technicians try to package the parts of the portable electronic device into one part to reduce the occupied space, such as the MIC and the speaker unit. Packaged into a modular part, etc.

Due to the different positions of the various components in the module components, the traditional flat-shaped conductive elements can no longer meet the requirements for conducting various components. Therefore, when assembling, a bending structure is often provided on the conductive member to realize the conduction between the components in the module component and the external circuit. In the module components, flexible circuit boards are mostly used as conductive parts. The material of the flexible circuit board itself is relatively soft. When the bending margin is large, the position of the welding part on the conductive part is easy to shift, which leads to the welding of conductive parts. The welding quality between the soldering part and the device pad is poor. During the drop test, the connection between the soldering part of the conductive part and the pad is very easy to break, which cannot meet the reliability requirements.

Summary of the invention

In view of the above problems, the technical problem to be solved by the present invention is to provide a speaker module. The loudspeaker module can effectively eliminate the problem of the large margin at the bending part of the conductive part, which is easy to cause the position of the welding part on the conductive part to shift, resulting in poor welding quality and poor reliability of the welding part.

To solve the above technical problems, the present invention adopts the following technical solutions:

A speaker module includes a housing formed with a accommodating cavity and a speaker unit accommodated in the accommodating cavity; the speaker module includes a conductive module arranged in the sound cavity behind the module, including a long axis direction and a short axis direction. Pieces,

The speaker module includes a limit structure located in the rear acoustic cavity;

The conductive member includes a first body portion, a second body portion, and a third body portion that are sequentially formed by bending along the long axis direction;

The first body portion at least includes a welding portion that forms an electrical connection with the speaker unit, and the first body portion further includes an extension portion extending from a section edge of the first body portion in the minor axis direction;

The extension portion is configured to abut the limiting structure to limit the position of the welding portion on the first body portion from shifting.

In addition, a preferred solution is that the conductive member is a flexible circuit board, and the first body portion, the second body portion, and the third body portion are integrally formed by bending the flexible circuit board.

In addition, a preferred solution is that the extension portion is formed by widening the section of the first body portion in the minor axis direction.

In addition, a preferred solution is that the extension portion includes a first extension portion and a second extension portion respectively extending from a section edge of the first body portion to both sides of the first body portion along the minor axis direction;

The limiting structure includes a first limiting structure and a second limiting structure respectively corresponding to the first extending portion and the second extending portion.

In addition, a preferred solution is that the limiting structure is arranged on the inner surface of the housing wall corresponding to the edge of the extension part;

The limiting structure is integrally formed with the shell wall, or the limiting structure is fixed on the shell by bonding.

In addition, a preferred solution is that the limiting structure is formed by ribs formed outwardly protruding from the inner surface of the side wall of the housing corresponding to the edge of the extension portion.

In addition, a preferred solution is that the limiting structure is formed by a convex part corresponding to the side edge of the extension part formed by the inner surface of the bottom wall of the housing protruding outward.

In addition, a preferred solution is that the module includes a gas-permeable isolator assembly located in the acoustic cavity behind the module, a clip wall extending from the bottom surface to the top surface of the casing is formed on the casing, and the gas-permeable isolator component is arranged in In the clamping wall and together with the clamping wall, the rear acoustic cavity of the module is divided into a first cavity and a second cavity;

The clamping wall includes a vertical edge portion corresponding to the edge of the extension portion and extending from the bottom surface to the top surface of the housing, and the limiting structure is formed by the vertical edge portion of the clamping wall.

In addition, a preferred solution is that the air-permeable isolation assembly includes a first air-permeable isolation portion located at the side of the first body portion, and the limiting structure is formed on the vertical edge of the clamping wall corresponding to the first air-permeable isolation portion on.

In addition, a preferred solution is that the air-permeable isolation assembly further includes a second air-permeable isolation portion bent and extended from one end of the first air-permeable isolation portion; the second air-permeable isolation portion is located above the first body portion.

The beneficial effects of the present invention are as follows:

Compared with the prior art, the speaker module structure provided by the present invention can meet the conduction requirements between multiple devices in the module and external circuits through the design of the bending structure on the conductive member. And through the cooperation between the upper extension of the conductive element and the limiting structure in the module housing, it can effectively prevent the conductive element from being reset due to the soft material of the conductive element when the margin at the bending structure of the conductive element is large. Due to the influence of force, the problem of positional deviation of the welding part of the conductive part is likely to occur, thereby ensuring a good welding quality between the welding part of the conductive part and the device pad. When the drop test is performed, the welding part of the conductive part and the pad The connection is not easy to break and can meet the reliability requirements.

Description of the drawings

The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Figure 1 shows a partial structural assembly diagram of a speaker module provided by the present invention.

Fig. 2 shows a top view of the structure shown in Fig. 1.

Fig. 3 shows an A-A sectional view of the structure shown in Fig. 2.

Detailed ways

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

The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any limitation to the present invention and its application or use.

The technology and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technology and equipment should be regarded as part of the specification.

In all the examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

In order to solve the problem that the position of the welding part on the conductive part is easily affected by the bending structure of the conductive part in the prior art speaker module structure, the position of the welding part is deviated, which leads to poor welding quality and poor reliability between the conductive part welding part and the device pad . As shown in FIG. 1, FIG. 2 and FIG. 3, the present invention provides a speaker module. The module includes a housing formed with a containing cavity and a speaker unit at least accommodated in the containing cavity. The speaker unit separates the accommodating cavity into a front acoustic cavity and a rear acoustic cavity 10 that are isolated from each other; in this embodiment, the module housing includes a module upper shell 1, a module middle shell 2 and a module that are matched and fixed together Lower shell 3. The speaker unit and the module upper shell 1 or the module lower shell 3 enclose the module front acoustic cavity, and the speaker unit, the upper shell 1, the middle shell 2 and the lower shell 3 jointly enclose the module rear acoustic cavity 10. Those skilled in the art can understand that, in other embodiments, the module housing may also be composed of an upper housing and a lower housing. In this structure, the rear acoustic cavity of the lower module may be jointly enclosed by a single body, the upper housing and the lower housing. This embodiment does not limit this.

As shown in the drawings, in order to enable the components inside the speaker module to be connected to the circuit outside the module, the speaker module of this embodiment includes a long-axis direction and a short-axis direction that are arranged in the acoustic cavity 10 behind the module. The conductive parts4. The conductive member 4 in the speaker module usually includes a welding part 411 for welding with the internal circuit of the speaker unit to form an electrical connection and an external part for electrically connecting with an external circuit. It should be noted that the long axis direction and the short axis direction mentioned in this case should be understood in a broad sense as the extending direction of the conductive member 4 is the long axis direction, and the width direction of the conductive member is the short axis direction.

In this embodiment, the conductive member 4 includes a first body portion 41, a second body portion 42, and a third body portion 43 that are sequentially formed by bending along the long axis direction, and a welding portion 411 is formed on the first body. The position of the edge of the section 41. Preferably, the conductive member 4 is a flexible circuit board, and the first body portion 41, the second body portion 42, and the third body portion 43 are integrally formed by bending the flexible circuit board. The conductive member 4 in this embodiment includes a bending structure 5 formed by a first body portion 41, a second body portion 42, and a third body portion 43. The first body portion 41 and the third body portion 43 are located Different horizontal planes, and extend in the opposite direction. The first body portion 41 extends against the bottom surface of the upper module shell 1, which can save the cavity space of the acoustic cavity behind the module occupied by the conductive element.

It can be seen in conjunction with the drawings that the conductive member 4 in this embodiment not only includes a welding portion 411 formed on the first body portion 41 and an external portion for connecting the module housing with an external circuit, but also includes Other components in the speaker module (such as a microphone, etc.) are mated and connected to the electrical connection portion formed on the third body portion 43.

When a microphone or other device and a speaker unit are assembled together in the module housing and share a conductive part, the components of the speaker module can be effectively reduced, the structure of the speaker module is simplified, the assembly difficulty is reduced, and the production efficiency is improved. For this kind of speaker module including multiple devices, in order to meet the needs of different positions of the multiple device configuration, it is bound to be formed on the conductive member with a bent structure 5 as shown in the figure. This kind of conductive member 4 with a bent structure 5 It can reduce the wiring difficulty of the conductive element in the housing, and under the premise of ensuring the stability of the combination between the conductive element and the module housing, it has the advantages of further reducing the structural size of the speaker module. However, due to the relatively soft material of the conductive parts (such as flexible circuit boards), when the bending structure 5 has a large margin, affected by the reset force of the bending structure 5 of the conductive part 4, the welding part of the conductive part 4 The position of 411 is prone to deviation, which leads to poor welding quality between the soldering portion 411 of the conductive member 4 and the device pad. During the drop test, the connection between the soldering portion 411 of the conductive member 4 and the pad is easily broken, which cannot be satisfied. Reliability requirements.

In view of the above-mentioned drawbacks, in the speaker module structure provided by this embodiment, the speaker module includes a limiting structure located in the rear acoustic cavity 10; the first body portion 41 of the conductive member 4 includes a structure formed by the first body portion 41 An extension portion extending from the edge of the segment along the short axis direction; the extension portion is configured to abut the limiting structure to limit the position of the welding portion 411 on the first body portion 41 from shifting. Through the cooperation between the upper extension part of the conductive element 4 and the limiting structure in the module housing, the upper welding portion 411 of the conductive element 4 can be limited. When the bending structure 5 of the conductive element 4 has a large margin, Effectively avoid the problem of positional deviation of the welding part of the conductive part due to the soft material of the conductive part and the resetting force of the bending structure of the conductive part, ensuring good welding quality between the welding part of the conductive part and the device pad .

For the formation of the extension part, a preferred solution is that the extension part is formed by widening the section of the first body part 41 in the minor axis direction. That is to say, the width of the flexible circuit board can be increased to realize the matching and limiting of the flexible circuit board and the limiting structure. Regarding the formation of the limiting structure, the limiting structure is arranged on the inner surface of the shell wall corresponding to the edge of the extension portion. For example, the limiting structure may be formed by the inner surface of the side wall of the housing corresponding to the edge of the extension portion. Alternatively, the limiting structure is formed by a convex portion corresponding to the side edge of the extension portion formed by the inner surface of the bottom wall of the housing being convex outward. Alternatively, the limiting structure is formed by ribs formed outwardly protruding from the inner surface of the side wall of the housing corresponding to the edge of the extension portion. For the combination of the limiting structure and the shell wall, the limiting structure may be integrally formed with the shell wall by integral injection molding, or the limiting structure may be a separate component and fixed to the shell by bonding. The housing.

In the structure of the drawings provided by the present invention, referring to FIG. 1, as a preferred embodiment, the extension portion includes a section edge of the first body portion 41 extending toward the first body portion along the short axis direction. A first extension portion 412 and a second extension portion 413 extending from both sides. The limiting structure includes a first limiting structure and a second limiting structure respectively corresponding to the first extension 412 and the second extension 413.

As shown in FIG. 1, the first limiting structure is located on one side of the welding part 411, and the first limiting structure is formed by the ribs 6 formed by the outward protrusion of the inner surface of the side wall of the housing. A first extension portion 412 is formed on the first body portion 41 corresponding to the rib 6 of the first limiting structure, and the outer edge of the first extension portion 412 abuts and fixes the surface of the rib 6. Through the cooperation of the first extension portion 412 and the first limiting structure rib 6, a limiting effect on the welding portion from one side of the welding portion 411 is formed.

In the speaker module structure shown in Fig. 1 and Fig. 3 together, as a preferred embodiment, the module includes a breathable spacer assembly 7 located in the acoustic cavity 10 behind the module, and a flange is formed on the housing A clamping wall 8 extending from the bottom surface of the housing to the top surface. The air-permeable isolation component 7 is arranged in the clamping wall 8 and together with the clamping wall 8 separates the module rear acoustic cavity 10 into a first cavity 101 and a second cavity 102 . Specifically, in this embodiment, the air-permeable isolation assembly 7 includes a first air-permeable isolation portion 71 located at the side of the first body portion 41, and a second air-permeable isolation portion 71 bent and extended from one end of the first air-permeable isolation portion 71 The air-permeable isolation portion 72; the second air-permeable isolation portion 72 is located above the first body portion 41.

For the module structure including the above-mentioned air-permeable spacer assembly 7, the second limiting structure is formed on the clip wall 8 corresponding to the first air-permeable spacer 71, and the clip wall 8 includes a direction along the bottom surface to the top surface of the housing An extended vertical edge 81, and the second limiting structure is formed by the vertical edge 81 of the clamping wall 8. The first body portion 41 includes a second extension portion 413 corresponding to the second limiting structure. The outer side edge of the second extension portion 413 is connected to the vertical edge 81 of the clamping wall 8 forming the second limiting structure. The surface abuts and is fixed. Through the cooperation of the second extension portion 413 and the second limiting structure, a limiting effect on the welding portion from the other side of the welding portion 411 is formed. Through the above design, the cooperation of the first limiting structure and the first extension portion 412, and the cooperation of the second limiting structure and the second extension portion 413 are able to resist the first position in the direction of the return force of the bending structure 5 of the conductive member 4 The body portion 41 is restricted so that the position of the welding portion 411 does not shift, and the first restriction structure and the second restriction structure are respectively located on both sides of the welding portion 411, thereby increasing the stability of the restriction and avoiding As a result, the first body portion 41 shakes.

Those skilled in the art can understand that, in this case, the acoustic cavity 10 behind the module is divided into a first cavity 101 and a second cavity 102 by a gas-permeable isolation component 7, wherein the first cavity 101 can be used as a filling for sound-absorbing particles. The sound-absorbing particles are used to reduce the F0 value of the speaker module and improve the low-frequency performance. The first and second air-

permeable isolation parts

71 and 72 of the air-permeable isolation assembly can prevent sound-absorbing particles from entering other areas of the rear acoustic cavity, which is beneficial To protect the speaker unit and other devices, in this embodiment, the air-permeable spacer assembly can be composed of a support frame and a mesh that is fixed to the support frame by bonding, or can also be made of other materials known in the art. The structure of the breathable spacer assembly.

In addition, in this embodiment, the module housing is provided with welding shrapnel 9 electrically connected to the two voice coil leads of the speaker unit, respectively, and the welding shrapnel 9 is welded to the welding portion 411 on the first body portion 41 to form an electrical connection. connection. The welding spring 9 includes a fixed part fixed to the housing and a suspended part 91 suspended in the acoustic cavity behind the module. The suspended part 91 includes a through hole, and the welding part 411 on the first body part 41 The through hole is covered, and is combined and fixed with the suspended portion 91 of the welding spring 9 by means of soldering. The structural design of the suspended part of the welding shrapnel can ensure the space utilization of the sound cavity behind the module and improve the sound quality of the speaker. By welding the suspended part of the shrapnel and the welding part of the conductive part, the heat generated by welding will not be concentrated around the welding part. The module housing protects the module housing from deformation or even damage due to high temperature, ensuring the appearance of the module and the subsequent assembly process of other components of the speaker module.

It can be seen from the above embodiments that the speaker module structure provided by the present invention utilizes the cooperation between the upper extension part of the conductive member and the limiting structure in the module housing, so that when the bending structure of the conductive member has a large margin, Effectively avoid the problem of positional deviation of the welding part of the conductive part due to the soft material of the conductive part and the resetting force of the bending structure of the conductive part, thereby ensuring good welding between the welding part of the conductive part and the device pad quality.

Obviously, the above-mentioned embodiments of the present invention are merely examples to clearly illustrate the present invention, and are not meant to limit the implementation of the present invention. For those of ordinary skill in the art, they can also do on the basis of the above description. In addition to other different forms of changes or changes, it is not possible to list all the implementations here. Any obvious changes or changes derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

A speaker module includes a housing formed with a accommodating cavity and a speaker unit accommodated in the accommodating cavity; the speaker module includes a conductive module arranged in the sound cavity behind the module, including a long axis direction and a short axis direction. Pieces, characterized by,

The speaker module includes a limit structure located in the rear acoustic cavity;

The conductive member includes a first body portion, a second body portion, and a third body portion that are sequentially formed by bending along the long axis direction;

The first body portion at least includes a welding portion that forms an electrical connection with the speaker unit, and the first body portion further includes an extension portion extending from a section edge of the first body portion in the minor axis direction;

The extension portion is configured to abut the limiting structure to limit the position of the welding portion on the first body portion from shifting.
The module according to claim 1, wherein the conductive member is a flexible circuit board, and the first body portion, the second body portion, and the third body portion are integrally formed by bending the flexible circuit board.
The module according to claim 1, wherein the extension portion is formed by widening the section of the first body portion in the short axis direction.
The module according to claim 1, wherein the extension portion includes a first extension portion and a second extension portion extending from a section edge of the first body portion to both sides of the first body portion along the minor axis direction. Two extensions;

The limiting structure includes a first limiting structure and a second limiting structure respectively corresponding to the first extending portion and the second extending portion.
The module according to claim 1, wherein the limiting structure is provided on the inner surface of the housing wall corresponding to the edge of the extension part;

The limiting structure is integrally formed with the shell wall, or the limiting structure is fixed on the shell by bonding.
The module according to claim 5, wherein the limiting structure is formed by a rib formed outwardly protruding from the inner surface of the side wall of the housing corresponding to the edge of the extension portion.
The module according to claim 5, wherein the limiting structure is formed by a protrusion formed by the inner surface of the bottom wall of the housing and corresponding to the side edge of the extension.
The module according to claim 1, wherein the module includes an air-permeable spacer assembly located in the acoustic cavity behind the module, and a clip extending from the bottom surface to the top surface of the shell is formed on the shell A wall, a gas-permeable isolation component is arranged in the clip wall and together with the clip wall separates the rear acoustic cavity of the module into a first cavity and a second cavity;

The clamping wall includes a vertical edge portion corresponding to the edge of the extension portion and extending from the bottom surface to the top surface of the housing, and the limiting structure is formed by the vertical edge portion of the clamping wall.
The module according to claim 8, wherein the air-permeable isolation component includes a first air-permeable isolation portion located at a side of the first body portion, and the limiting structure is formed corresponding to the first air-permeable isolation portion On the vertical side of the clamp wall.
The module according to claim 9, wherein the air-permeable isolation component further comprises a second air-permeable isolation portion bent and extended from one end of the first air-permeable isolation portion; An upper position of the main body.