Loudspeaker module and electronic device

Abstract

This utility model relates to the field of electroacoustic product technology, and discloses a loudspeaker module and electronic device. The loudspeaker includes a metal front shell, a metal rear shell, a bracket, a loudspeaker unit, a metal mesh, and a support frame. The metal rear shell and the metal front shell are joined to form a chamber; the bracket is fixed inside the metal front shell; the loudspeaker unit is fixed to the metal front shell, and the periphery of the loudspeaker unit abuts against the inner sidewall of the bracket to divide the chamber into isolated front and rear acoustic chambers; the metal mesh is disposed inside the rear acoustic chamber and covers the loudspeaker unit; the support frame is disposed inside the rear acoustic chamber and fixed to the metal rear shell, and the support frame and the metal mesh are press-fitted together. This utility model can effectively reinforce the metal mesh and the loudspeaker unit, making the loudspeaker module structure more stable, reducing the risk of mechanical drop failure, preventing shell vibration and abnormal noise, and ensuring that the rear acoustic chamber has a sufficiently large space to improve acoustic performance.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic product technology, and in particular to a loudspeaker module and electronic device. Background Technology

[0002] Speaker modules are essential acoustic components in portable electronic devices, used to convert electrical signals into acoustic signals. A speaker module typically consists of a housing and speaker units housed within the housing, with the speaker units and housing forming isolated front and rear acoustic cavities.

[0003] In the existing technology, in order to ensure that the speaker module has a sufficiently large rear acoustic cavity, the speaker unit is often fixed to the front shell by adhesive. This not only has high requirements for the process standards of the adhesive application state and bonding force of the speaker unit, but also poses a risk of the speaker unit or metal mesh being broken off when mechanically dropped.

[0004] Therefore, there is an urgent need for a speaker module and electronic device to solve the above-mentioned technical problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a loudspeaker module and electronic device that can effectively reinforce the metal mesh and loudspeaker unit, making the structure of the loudspeaker module more stable, reducing the risk of mechanical drop failure, and preventing shell vibration noise; moreover, it occupies little space in the rear acoustic cavity, ensuring that the rear acoustic cavity has a sufficiently large space, thereby improving the acoustic performance of the loudspeaker module.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Speaker module, including:

[0008] Metal front shell;

[0009] A metal rear shell is docked with the metal front shell to form a chamber;

[0010] The bracket is fixed inside the metal front shell;

[0011] A loudspeaker unit is fixed to the metal front shell, and the periphery of the loudspeaker unit abuts against the inner sidewall of the bracket to divide the chamber into isolated front and rear acoustic chambers.

[0012] A metal mesh is disposed within the rear acoustic cavity and covers the speaker unit;

[0013] A support frame is disposed within the rear acoustic cavity and fixed to the metal rear shell, and the support frame is in interference fit with the metal mesh.

[0014] In some possible implementations, the support frame is made of metal and is fixed to the metal rear shell by welding.

[0015] In some possible implementations, the support frame includes a main body portion abutting against the metal mesh and a first connecting portion extending from the main body portion toward the metal rear shell, the first connecting portion being welded and fixed to the metal rear shell.

[0016] In some possible implementations, the support frame includes two first connecting portions, which are disposed opposite to each other on both sides of the main body.

[0017] In some possible implementations, the support frame further includes a second connecting portion extending from the main body toward the speaker unit, the second connecting portion abutting against the side of the speaker unit.

[0018] In some possible implementations, the support frame includes four first connecting portions and two second connecting portions, the four first connecting portions being arranged opposite each other on both sides of the main body, and the two second connecting portions being arranged opposite each other on both sides of the main body; or,

[0019] The support frame includes two first connecting parts and four second connecting parts. The two first connecting parts are disposed opposite to each other on both sides of the main body, and the four second connecting parts are disposed opposite to each other on both sides of the main body.

[0020] In some possible implementations, the bracket is made of plastic, and the metal front shell is integrally formed with the bracket by injection molding.

[0021] In some possible implementations, the periphery of the speaker unit and the inner wall of the bracket are provided with a positioning protrusion and a positioning groove, respectively, and the positioning protrusion engages with the positioning groove.

[0022] In some possible implementations, the speaker unit is fixed to the metal front shell with adhesive; the bracket is provided with an adhesive reservoir, and the speaker unit is sealed with the metal front shell and the bracket by injecting sealant.

[0023] In some possible implementations, the rear acoustic cavity is filled with sound-absorbing particles, the metal mesh is placed between the speaker unit and the sound-absorbing particles, and the metal mesh is provided with vent holes that connect the speaker unit and the rear acoustic cavity.

[0024] In some possible implementations, a protective film is fixed to the outer side of the metal front shell, and the protective film is provided with air-permeable slits;

[0025] The metal rear shell is provided with a filling port that communicates with the rear acoustic cavity; a sealing mesh is provided at the filling port.

[0026] An electronic device, including a speaker module as described in any of the above embodiments, wherein the speaker module is disposed in the housing of the electronic device.

[0027] The beneficial effects of this utility model are:

[0028] The speaker module provided by this utility model consists of a metal front shell and a metal rear shell joined together to form an outer shell. The metal outer shell can improve the structural strength of the speaker module, reduce the shell thickness, improve the performance and heat dissipation of the speaker unit, and make the speaker module smaller, which is in line with the trend of miniaturization of electronic devices. By having the periphery of the speaker unit abut against the inner wall of the bracket, the cavity inside the shell can be divided into isolated front and rear acoustic cavities, maximizing the cavity space of the front and rear acoustic cavities within a limited space, which is beneficial to improving the cavity performance of the speaker module. By placing a metal mesh inside the rear acoustic cavity and covering the speaker unit, it is convenient to fill the rear acoustic cavity with sound-absorbing material. The speaker unit is separated from the sound-absorbing particles during particle placement, thus protecting the speaker unit. Furthermore, a support frame is installed inside the rear acoustic cavity. One side of the support frame is fixed to the metal rear shell, and the other side is press-fitted against the metal mesh. This effectively reinforces both the metal mesh and the speaker unit, making the speaker module structure more stable and significantly reducing the risk of the speaker unit or metal mesh being damaged by mechanical drops. This prevents shell vibration and abnormal noise, while also lowering the process standards for the adhesive application and bonding force of the speaker unit, facilitating manufacturing. Moreover, the support frame itself is small in size and occupies little space within the rear acoustic cavity, effectively ensuring sufficient space in the rear acoustic cavity and improving the acoustic performance of the speaker module.

[0029] The electronic device provided by this utility model, by adopting the above-mentioned speaker module, has a more stable structure, reduces the risk of mechanical drop failure, prevents shell vibration noise, and is conducive to the miniaturization design of electronic devices, thus improving acoustic performance. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the first angle structure of the speaker module provided in this embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the second angle structure of the speaker module provided in this embodiment of the utility model;

[0032] Figure 3 This is an exploded view of the speaker module provided in this embodiment of the utility model;

[0033] Figure 4 This is a cross-sectional view of the speaker module provided in this embodiment of the utility model;

[0034] Figure 5 This is an assembly drawing of the metal back shell and support frame provided in an embodiment of the present utility model;

[0035] Figure 6 This is a schematic diagram of the metal mesh structure provided in an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of a support frame structure provided in an embodiment of the present utility model;

[0037] Figure 8 This is a schematic diagram of another support frame structure provided in an embodiment of the present utility model;

[0038] Figure 9 This is a schematic diagram of another support frame structure provided in this utility model embodiment.

[0039] In the picture:

[0040] 1. Metal front shell; 10. Ventilation slit; 12. Protective film; 2. Metal rear shell; 21. Filling port; 22. Sealing mesh; 3. Bracket; 31. Glue storage tank; 4. Speaker unit; 5. Metal mesh; 51. Bottom; 52. Side; 6. Support frame; 61. Main body; 62. First connecting part; 63. Second connecting part; 7. Flexible circuit board; 81. Front acoustic cavity; 82. Rear acoustic cavity. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this utility model, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0045] like Figures 1 to 9 As shown, this embodiment provides a speaker module that can be used in electronic devices such as mobile phones, tablets, and speakers. The speaker module includes a metal front shell 1, a metal rear shell 2, a bracket 3, a speaker unit 4, a metal mesh 5, and a support frame 6. The metal front shell 1 and the metal rear shell 2 are joined together to form a chamber, in which the bracket 3, speaker unit 4, metal mesh 5, and support frame 6 are all disposed. Optionally, in this embodiment, the metal front shell 1 and the metal rear shell 2 are fixed by laser welding, resulting in a strong and reliable connection. In other embodiments, the metal front shell 1 and the metal rear shell 2 can also be connected by bonding, screwing, or other methods. Both the metal front shell 1 and the metal rear shell 2 are made of metal, which improves the structural strength of the speaker module, reduces the shell thickness, improves the performance and heat dissipation of the speaker unit 4, and makes the speaker module smaller, conforming to the trend of miniaturization in electronic devices. Specifically, the materials of the metal front shell 1 and the metal rear shell 2 can be, but are not limited to, steel, aluminum, or copper.

[0046] The bracket 3 is fixed inside the metal front shell 1, specifically a frame-shaped structure, which fits snugly against the inner wall of the metal front shell 1. The speaker unit 4 is fixed to the metal front shell 1, and the periphery of the speaker unit 4 abuts against the inner wall of the bracket 3, thus dividing the chamber into isolated front acoustic chamber 81 and rear acoustic chamber 82. This maximizes the cavity space of the front acoustic chamber 81 and rear acoustic chamber 82 within a limited space, which is beneficial to improving the cavity performance of the speaker module. (Refer to...) Figure 4As shown, in this embodiment, the metal front shell 1, the bracket 3 and the speaker unit 4 form a front acoustic cavity 81, and the metal front shell 1, the metal rear shell 2, the bracket 3 and the speaker unit 4 form a rear acoustic cavity 82.

[0047] A metal mesh 5 is disposed within the rear acoustic cavity 82 and covers the speaker unit 4. In this embodiment, the rear acoustic cavity 82 is also filled with sound-absorbing particles. The metal mesh 5 separates the speaker unit 4 from the sound-absorbing particles, thus protecting the speaker unit 4. Specifically, the metal mesh 5 includes a bottom 51 and a side portion 52 surrounding the periphery of the bottom 51. The bottom 51 is fitted to the speaker unit 4, and the side portion 52 extends towards the speaker unit 4. The metal mesh 5 also has a first vent hole connecting the speaker unit 4 and the rear acoustic cavity 82 to ensure balanced venting of the speaker unit 4. The diameter of the first vent hole is smaller than that of the sound-absorbing particles to prevent the sound-absorbing particles from entering the speaker unit 4. In this embodiment, by filling the rear acoustic cavity 82 with sound-absorbing particles, a virtual acoustic cavity is formed, thereby increasing the acoustic cavity size. This is used to reduce the resonant frequency of the speaker module and improve its audio performance, especially its low-frequency acoustic performance. Specifically, in this embodiment, Nbass powder is filled into the rear acoustic cavity 82 using a full-filling method. Furthermore, the metal rear shell 2 is also provided with a filling port 21 that communicates with the rear acoustic cavity 82, so as to fill the rear acoustic cavity 82 with sound-absorbing particles. A sealing mesh 22 is provided at the filling port 21 to seal the filling port 21 and prevent the sound-absorbing particles from leaking. The sealing mesh 22 is provided with a second vent hole to ensure the air leakage balance of the rear acoustic cavity 82. The diameter of the second vent hole is smaller than that of the sound-absorbing particles.

[0048] The support frame 6 is located inside the rear acoustic cavity 82. One side of the support frame 6 is fixed to the metal rear shell 2. After the metal front shell 1 and the metal rear shell 2 are assembled, the other side of the support frame 6 is press-fitted against the metal mesh 5. By setting the support frame 6, the metal mesh 5 and the speaker unit 4 can be supported and reinforced, making the structure of the speaker module more stable. This greatly reduces the risk of the speaker unit 4 or the metal mesh 5 being dropped during mechanical drops, preventing shell vibration and abnormal noise. At the same time, it reduces the process standard requirements for the adhesive application and bonding force of the speaker unit 4, making it easier to process. Moreover, the support frame 6 itself is small in size and occupies little space in the rear acoustic cavity 82, effectively ensuring that the rear acoustic cavity 82 has a sufficiently large space, thus improving the acoustic performance of the speaker module.

[0049] Optionally, the support frame 6 is made of metal and is fixed to the metal rear shell 2 by welding. This increases the structural strength of the support frame 6 and the reliability of the connection between the support frame 6 and the metal rear shell 2 while reducing the volume of the support frame 6. Furthermore, the support frame 6 is a steel sheet structure, which occupies only a small portion of the rear cavity volume, improving product reliability while ensuring good low-frequency performance.

[0050] In some embodiments, the support frame 6 includes a main body 61 and a first connecting portion 62. The main body 61 is a flat plate structure for abutting against the side of the metal mesh 5 away from the speaker unit 4. The first connecting portion 62 extends from the main body 61 toward the metal rear shell 2 for welding and fixing to the metal rear shell 2. This arrangement helps to reduce the space occupied by the support frame 6 in the rear acoustic cavity 82. In some embodiments, the support frame 6 further includes a second connecting portion 63, which extends from the main body 61 toward the speaker unit 4 for abutting against the side of the speaker unit 4 to hold the speaker unit 4 tightly. This arrangement can further support and reinforce the speaker unit 4 and the metal mesh 5, preventing the speaker unit 4 and the metal mesh 5 from falling off between the metal front shell 1 and the metal rear shell 2 due to external impact.

[0051] like Figure 7 As shown, in an optional embodiment of this utility model, the support frame 6 has a U-shaped structure, including a main body 61 and two first connecting parts 62. The main body 61 extends along the width direction of the metal rear shell 2, and the two first connecting parts 62 are disposed opposite to each other at both ends of the main body 61. The two first connecting parts 62 are respectively attached to the inner sidewall of the metal rear shell 2 and welded to the metal rear shell 2. This arrangement is reasonable and can further reduce the space occupied by the support frame 6 in the rear acoustic cavity 82, improve the connection reliability between the support frame 6 and the metal rear shell 2, and ensure the consistency of the relative height of the surface of the main body 61 after assembly. Figure 8 As shown, in another optional embodiment of this utility model, the support frame 6 is a four-legged, two-handed structure, including a main body 61, four first connecting parts 62, and two second connecting parts 63. The main body 61 extends along the width direction of the metal rear shell 2. The four first connecting parts 62 are arranged opposite each other at both ends of the main body 61. The four first connecting parts 62 are respectively attached to the inner sidewall of the metal rear shell 2 and welded to the metal rear shell 2, which improves the connection reliability between the support frame 6 and the metal rear shell 2. The two second connecting parts 63 are arranged opposite each other at both ends of the main body 61 to hold the speaker unit 4, thus achieving further reinforcement and protection of the speaker unit 4. Figure 9As shown, in another optional embodiment of this utility model, the support frame 6 has a two-legged, four-handed structure, including two first connecting parts 62 and four second connecting parts 63. The main body 61 extends along the width direction of the metal rear shell 2. The two first connecting parts 62 are disposed opposite to each other at both ends of the main body 61. The two first connecting parts 62 are respectively attached to the inner sidewall of the metal rear shell 2 and welded to the metal rear shell 2 to ensure the reliable connection between the support frame 6 and the metal rear shell 2. The four second connecting parts 63 are disposed opposite to each other at both ends of the main body 61 to more firmly hold the speaker unit 4 and prevent the speaker unit 4 from falling off during mechanical drops. Of course, in other embodiments, the support frame 6 can also be configured in other forms. For example, the number and position of the first connecting parts 62 and the second connecting parts 63 can be adjusted according to actual needs. This utility model does not limit this.

[0052] Optionally, the bracket 3 is made of plastic, and the metal front shell 1 and the bracket 3 are integrally molded by injection molding. In this embodiment, by directly injection molding the plastic bracket 3 into the metal front shell 1, the reliability of the connection between the bracket 3 and the metal front shell 1 can be ensured, which is beneficial to the improvement of structural strength; it can also play a role in accurately fixing and supporting the speaker unit 4; at the same time, it can reduce the risk of sound leakage in the front acoustic cavity 81, which is beneficial to the improvement of the acoustic performance of the speaker module. Further, in this embodiment, a protective film 12 is fixed on the outside of the metal front shell 1. The protective film 12 can play a role in dust and pressure protection for the speaker module before use. When the whole machine is used, the protective film 12 must be removed first. The protective film 12 also has a vent slit 10 for ventilation when the protective film 12 is automatically attached, so as to balance the air pressure on both sides and prevent the protective film 12 from being detached due to the increase of internal air pressure caused by trapped air.

[0053] Optionally, in this embodiment, the speaker unit 4 and the metal front shell 1 are assembled through two dispensing processes. The first dispensing process involves applying adhesive to the metal front shell 1 and / or the speaker unit 4 to bond and fix the metal front shell 1 to the speaker unit 4. The second dispensing process involves injecting sealant between the speaker unit 4 and the bracket 3 to encapsulate the speaker unit 4 with the metal front shell 1 and the bracket 3. Further, a glue reservoir 31 is provided on the side of the bracket 3 closest to the speaker unit 4. During dispensing, the sealant can seep through the glue reservoir 31 into the gap between the speaker unit 4 and the bracket 3 and the metal front shell 1. After the sealant cures, it can reliably fix the speaker unit 4 to the bracket 3. At the same time, the seeping sealant can also seal the slight shrinkage and steel-plastic separation formed during the integral injection molding of the metal front shell 1 and the bracket 3, thereby effectively isolating the front acoustic cavity 81 and the rear acoustic cavity 82.

[0054] Furthermore, before fixing the speaker unit 4 to the metal front shell 1, this embodiment can also position the speaker unit 4 to ensure the accuracy of the speaker unit 4's installation position. Specifically, the periphery of the speaker unit 4 and the inner wall of the bracket 3 are provided with a positioning protrusion on one side and a positioning groove on the other side. By engaging with the positioning protrusion and the positioning groove, the speaker unit 4 can be accurately positioned, facilitating the smooth progress of the subsequent gluing process.

[0055] The speaker module in this embodiment also includes a flexible circuit board 7, which is installed in the cavity. One end of the flexible circuit board 7 is electrically connected to the speaker unit 4, and the other end extends out of the cavity through a clearance hole on the metal front shell 1. Optionally, the flexible circuit board 7 has an inner pad located in the cavity, so that the flexible circuit board 7 is electrically connected to the speaker unit 4 through the inner pad; the flexible circuit board 7 also has an outer pad located at the end of the flexible circuit board 7 that extends out of the cavity, so that the flexible circuit board 7 is connected to an external power supply through the outer pad.

[0056] This utility model also provides an electronic device, including a housing and the aforementioned speaker module, wherein the speaker module is installed in the housing. By employing the speaker module, this electronic device has a more robust structure, reduces the risk of mechanical drop failure, prevents abnormal noise due to housing vibration, and facilitates miniaturization design, thereby improving acoustic performance. Specifically, the electronic device of this embodiment can be a computer, mobile phone, speaker, or a car speaker system used in automobiles, etc.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A speaker module, characterized in that, include: Metal front shell; A metal rear shell is docked with the metal front shell to form a chamber; The bracket is fixed inside the metal front shell; A loudspeaker unit is fixed to the metal front shell, and the periphery of the loudspeaker unit abuts against the inner sidewall of the bracket to divide the chamber into isolated front and rear acoustic chambers. A metal mesh is disposed within the rear acoustic cavity and covers the speaker unit; A support frame is disposed within the rear acoustic cavity and fixed to the metal rear shell, and the support frame is in interference fit with the metal mesh.

2. The speaker module according to claim 1, characterized in that, The support frame is made of metal and is fixed to the metal rear shell by welding.

3. The speaker module according to claim 2, characterized in that, The support frame includes a main body portion that abuts against the metal mesh and a first connecting portion extending from the main body portion toward the metal rear shell, the first connecting portion being welded and fixed to the metal rear shell.

4. The speaker module according to claim 3, characterized in that, The support frame includes two first connecting parts, which are disposed opposite to each other on both sides of the main body.

5. The speaker module according to claim 3, characterized in that, The support frame also includes a second connecting portion extending from the main body to the speaker unit, the second connecting portion abutting against the side of the speaker unit.

6. The speaker module according to claim 5, characterized in that, The support frame includes four first connecting parts and two second connecting parts. The four first connecting parts are arranged in pairs opposite to each other on both sides of the main body, and the two second connecting parts are arranged opposite to each other on both sides of the main body; or, The support frame includes two first connecting parts and four second connecting parts. The two first connecting parts are disposed opposite to each other on both sides of the main body, and the four second connecting parts are disposed opposite to each other on both sides of the main body.

7. The speaker module according to claim 1, characterized in that, The bracket is made of plastic, and the metal front shell and the bracket are integrally formed by injection molding.

8. The speaker module according to claim 7, characterized in that, The periphery of the speaker unit and the inner wall of the bracket are provided with a positioning protrusion on one side and a positioning groove on the other side, and the positioning protrusion and the positioning groove are engaged with each other.

9. The speaker module according to claim 8, characterized in that, The speaker unit is fixed to the metal front shell with adhesive; the bracket is provided with an adhesive reservoir, and the speaker unit is sealed with the metal front shell and the bracket by injecting sealant.

10. The loudspeaker module according to any one of claims 1-9, characterized in that, The rear acoustic cavity is filled with sound-absorbing particles, and the metal mesh is placed between the speaker unit and the sound-absorbing particles. The metal mesh is provided with a first vent hole that connects the speaker unit and the rear acoustic cavity.

11. The speaker module according to claim 10, characterized in that, A protective film is fixed to the outside of the metal front shell, and the protective film is provided with air-permeable slits. The metal rear shell is provided with a filling port that communicates with the rear acoustic cavity; a sealing mesh is provided at the filling port.

12. An electronic device, characterized in that, Includes the speaker module according to any one of claims 1-11, wherein the speaker module is disposed in the housing of the electronic device.

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