Loudspeaker module and electronic equipment

Abstract

The invention provides a loudspeaker module and electronic equipment. The loudspeaker module and the electronic equipment are used for improving the tone quality experience of the loudspeaker module. The loudspeaker module comprises a first shell, a second shell, an electroacoustic transducer, sound absorption particles, a fixing ring and a breathable separator. The second shell is installed on the first shell, and the second shell and the first shell are enclosed to form a sound cavity. The second shell is provided with an avoiding hole, and the avoiding hole is communicated with the sound cavity and the outer side of the second shell. The electroacoustic transducer is installed in the sound cavity. The electroacoustic transducer comprises a lower pole piece and a voice diaphragm. The lower pole piece is arranged in the avoiding hole in a penetrating manner, and is spaced from the hole wall of the avoiding hole; the sound film and the lower pole piece are arranged at an interval, and the sound cavity is divided into a front sound cavity and a rear sound cavity. The sound absorption particles are filled in the rear sound cavity. The fixing ring is installed on the second shell and the lower pole piece and surrounds the edge of the lower pole piece. The breathable separator is fixedly connected to the upper surface of the fixing ring and is located between the hole wall of the avoiding hole and the lower pole piece. The breathable separator surrounds the electro-acoustic transducer and is used for isolating the sound-absorbing particles from the electro-acoustic transducer.

Description

Speaker modules and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 15, 2022, with application number 202210830426.4 and application name “Speaker Module and Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of audio technology, and in particular to a speaker module and an electronic device. Background Art

[0003] Speaker modules are a common audio component in current electronic devices. As electronic devices become thinner and lighter, the space available for speaker modules is shrinking, leading to a trend toward thinner and lighter speaker modules. However, the smaller rear acoustic chamber of these thinner speaker modules reduces the sound quality, resulting in a poorer sound experience for the electronic device.

[0004] Summary of the Invention

[0005] The present application provides a speaker module and an electronic device for improving the sound quality of the speaker module and enhancing the sound quality experience of the electronic device.

[0006] In a first aspect, the present application provides a speaker module comprising a first shell, a second shell, an electroacoustic transducer, sound-absorbing particles, and an isolation assembly. The second shell is mounted on the first shell and encloses the first shell to form a sound cavity. The second shell is provided with a relief hole, which connects the sound cavity to the outside of the second shell. The electroacoustic transducer is mounted in the sound cavity. The electroacoustic transducer comprises a lower pole piece and a sound diaphragm. The lower pole piece passes through the relief hole and is spaced apart from the hole wall of the relief hole. The sound diaphragm is spaced apart from the lower pole piece and divides the sound cavity into a front sound cavity and a rear sound cavity. The sound-absorbing particles are filled in the rear sound cavity. The isolation assembly comprises a fixing ring and a breathable isolation member. The fixing ring is mounted on the second shell and the lower pole piece and is arranged around the edge of the lower pole piece. The breathable isolation member is fixedly connected to the upper surface of the fixing ring and is located between the hole wall of the relief hole and the lower pole piece. The breathable isolation member is arranged around the electroacoustic transducer and is used to isolate the sound-absorbing particles from the electroacoustic transducer.

[0007] In the speaker module described in this application, sound-absorbing particles are filled into the rear acoustic cavity, achieving acoustic expansion of the rear acoustic cavity, which is equivalent to increasing the volume of the rear acoustic cavity. This helps achieve better low-frequency playback performance and enhances the speaker module's sound quality experience. The breathable isolation element isolates the sound-absorbing particles from the electroacoustic transducer, preventing the sound-absorbing particles from entering the electroacoustic transducer and affecting its sound quality.

[0008] In addition, the breathable spacer is predeterminedly fixed to the fixing ring, and the breathable spacer is not directly assembled on the electroacoustic transducer. This not only does not affect the size of the electroacoustic transducer, but also helps to achieve a lightweight design of the speaker module. It can also avoid the influence of the breathable spacer on the size and performance of the magnetic circuit, and helps to improve the sound quality experience of the speaker module.

[0009] In one embodiment, the first housing is provided with a sound outlet hole, which connects the front sound cavity and the outside of the first housing. When the speaker module is in operation, the sound generated by the speaker module is transmitted from the sound outlet hole to the outside of the speaker module, thereby realizing the sound of the speaker module.

[0010] In one embodiment, the sound outlet has a first opening and a second opening disposed opposite each other, with the first opening located on the inner surface of the first shell and the second opening located on the outer surface of the second shell. The diameter of the sound outlet gradually increases from the first opening toward the second opening, thereby improving the loudness of the speaker module.

[0011] In one embodiment, the second housing is provided with a first mounting groove, the opening of which is located on the lower surface of the second housing, and the first mounting groove is arranged around the avoidance hole and penetrates the hole wall of the avoidance hole. The lower pole piece is provided with a second mounting groove, the opening of which is located on the lower surface of the lower pole piece, and the second mounting groove is arranged around the edge of the lower pole piece and penetrates the peripheral side surface of the lower pole piece.

[0012] The fixing ring is installed in the first and second mounting slots. At least a portion of the fixing ring can also reuse the space between the second housing and the lower pole piece along the thickness direction of the speaker module, reducing the space occupied by the fixing ring in the thickness direction of the speaker module, thereby helping to achieve a lightweight and thin design of the speaker module.

[0013] In one embodiment, the lower surface of the fixing ring is flush with the lower surface of the second housing, or located above the lower surface of the second housing. The fixing ring can fully reuse the space of the second housing along the thickness direction of the speaker module, reducing the space occupied by the fixing ring in the thickness direction of the speaker module, thereby contributing to a thinner and lighter design of the speaker module.

[0014] In one embodiment, the lower surface of the retaining ring is flush with the lower surface of the lower pole piece, or located above the lower surface of the lower pole piece. The retaining ring can fully reuse the space of the lower pole piece along the thickness direction of the speaker module, reducing the space occupied by the retaining ring in the thickness direction of the speaker module, thereby contributing to a lighter and thinner design of the speaker module.

[0015] In one embodiment, the bottom wall of the first mounting groove and the bottom wall of the second mounting groove are both planes, and the speaker module also includes an adhesive layer, part of the adhesive layer is bonded between the upper surface of the fixing ring and the bottom wall of the first mounting groove, and part of the adhesive layer is bonded between the upper surface of the fixing ring and the bottom wall of the second mounting groove.

[0016] Since the bottom wall of the first mounting groove and the bottom wall of the second mounting groove are both flat, when the fixing ring is installed using the adhesive layer, the glue is easy to apply and flatten, which not only can achieve high-quality bonding between the fixing ring and the second shell and the lower pole piece, but also can avoid the problem of glue overflow during the bonding process, which is conducive to achieving an ultra-thin design of the speaker module.

[0017] In one embodiment, the second shell includes a shell body and a reinforcement. The shell body is provided with a mounting through hole, which passes through the shell body along the thickness direction of the shell body. The reinforcement is fixedly connected to the upper surface of the shell body and is arranged around the mounting through hole. Part of the reinforcement extends relative to the hole wall of the mounting through hole and is enclosed with the hole wall of the mounting through hole to form a first mounting groove.

[0018] The middle of the installation through hole forms an avoidance hole, the edge of the installation through hole forms a first installation groove, and the lower surface of the reinforcement forms a groove bottom wall of the first installation groove.

[0019] In one embodiment, the shell body is made of plastic, and the reinforcement is made of metal, with the shell body and reinforcement being integrally formed. Because the reinforcement is a steel sheet, and its lower surface forms the bottom wall of the first mounting slot, the structural stability of the first mounting slot is ensured, thereby enhancing the overall strength of the second shell.

[0020] In one embodiment, the fixing ring and the second shell are integrally formed to simplify the manufacturing process of the speaker module and reduce the production cost of the speaker module.

[0021] In one embodiment, the electroacoustic transducer further includes a frame, the frame comprising a frame positioned between the lower pole piece and the diaphragm, and a breathable spacer positioned below the frame and spaced apart from the frame. The gap between the breathable spacer and the frame is smaller than the size of the sound-absorbing particles, thereby preventing the sound-absorbing particles from entering the electroacoustic transducer through the gap between the breathable spacer and the frame, thereby ensuring the sound quality of the speaker module.

[0022] In one embodiment, the second shell is provided with a plurality of first positioning columns, and the plurality of first positioning columns are all provided on the upper surface of the second shell and are spaced apart around the avoidance hole. The plurality of first positioning columns are all located on the outside of the breathable isolation member and are spaced apart from the breathable isolation member to prevent the breathable isolation member from deforming in a direction away from the electroacoustic transducer, thereby ensuring the reliability of the use of the breathable isolation member.

[0023] In one embodiment, the electroacoustic transducer is provided with a plurality of second positioning posts, which are located at the edge of the electroacoustic transducer and spaced apart from each other. Each of the plurality of second positioning posts is located inside the air-permeable spacer and spaced apart from the air-permeable spacer to prevent the air-permeable spacer from deforming toward the electroacoustic transducer. This not only ensures the reliability of the air-permeable spacer, but also prevents the deformed air-permeable spacer from entering the interior of the electroacoustic transducer and causing noise or abnormal vibration.

[0024] In addition, the breathable insulation piece is positioned by the first positioning column and the second positioning column located on both sides. The end of the breathable insulation piece away from the fixing ring does not need to be fixed by glue, which avoids the problem of glue clogging the air holes and affecting the ventilation efficiency, thereby improving the breathability of the breathable insulation piece.

[0025] In one embodiment, the size of the gap between the second positioning post and the first positioning post is smaller than the particle size of the sound-absorbing particles to ensure that after the breathable isolation piece is deformed, the sound-absorbing particles cannot enter the electroacoustic transducer through the gap between the second positioning post and the first positioning post, thereby ensuring the sound quality experience of the speaker module.

[0026] In one embodiment, the basin frame includes a plurality of second positioning columns, which are fixedly connected to the lower surface of the frame and spaced apart from the supporting legs.

[0027] In one embodiment, the lower pole piece is provided with a plurality of snap-fit ​​notches, which penetrate the lower pole piece along the thickness direction of the lower pole piece and penetrate the peripheral side surface of the lower pole piece, and the plurality of snap-fit ​​notches are spaced apart from each other.

[0028] The basin frame also includes a plurality of legs, which are fixedly connected to the lower surface of the frame and spaced apart from each other. The plurality of legs are snap-fitted to the plurality of snap-fit ​​notches one by one to achieve assembly between the basin frame and the lower pole piece.

[0029] The fixing ring is also mounted on a plurality of supporting legs.

[0030] In one embodiment, the support leg further comprises a mounting notch, the opening of which is located on the lower surface of the support leg. The mounting notch also extends through the outer surface, left side, and right side of the support leg and communicates with the second mounting groove. A retaining ring is also mounted in the mounting notch.

[0031] In one embodiment, the bottom wall of the installation notch is a plane, and a portion of the adhesive layer is bonded between the upper surface of the fixing ring and the bottom wall of the installation notch.

[0032] In one embodiment, the electroacoustic transducer further includes two first side magnets, both of which are mounted on the upper surface of the lower pole piece and are spaced apart and arranged opposite to each other.

[0033] The air-permeable spacer has two clearance notches, each extending through the thickness of the spacer and extending through its upper surface. The two clearance notches are spaced apart and positioned opposite each other, each providing clearance for the two first-side magnets. The two clearance notches also provide clearance for the basin stand's legs, reducing the space occupied by the air-permeable spacer within the electroacoustic transducer and contributing to a slimmer and lighter speaker module design.

[0034] In one embodiment, the retaining ring is made of metal. For example, the retaining ring is made of steel. The retaining ring is strong but can be very thin, which allows the height of the breathable spacer to be increased, thereby increasing the ventilation capacity of the breathable spacer.

[0035] In one embodiment, the breathable spacer is provided with a plurality of air holes, each of which penetrates the breathable spacer along the thickness direction of the breathable spacer, and the aperture of each air hole is smaller than the particle size of the sound-absorbing particles to prevent the sound-absorbing particles from passing through the breathable spacer from the air holes into the electroacoustic transducer and affecting the sound quality of the electroacoustic transducer.

[0036] In one embodiment, the breathable spacer is a metal mesh, and the air holes are mesh holes of the breathable spacer, or the breathable spacer is made of metal, for example, the breathable spacer is a steel plate, and the air holes are formed by punching.

[0037] In a second aspect, the present application provides an electronic device comprising a housing and any one of the above-mentioned speaker modules, wherein the speaker module is installed on the inner side of the housing.

[0038] In the speaker module of the electronic device described in this application, sound-absorbing particles are filled into the rear acoustic cavity, achieving acoustic expansion of the rear acoustic cavity, which is equivalent to increasing the volume of the rear acoustic cavity. This helps achieve better low-frequency playback performance of the speaker module and enhances the sound quality experience of the speaker module. The breathable isolation member can isolate the sound-absorbing particles from the electroacoustic transducer, preventing the sound-absorbing particles from entering the electroacoustic transducer and affecting the sound quality of the electroacoustic transducer.

[0039] In addition, the breathable spacer is predeterminedly fixed to the fixing ring, and the breathable spacer is not directly assembled on the electroacoustic transducer. This not only does not affect the size of the electroacoustic transducer, but also helps to achieve a lightweight design of the speaker module. It can also avoid the influence of the breathable spacer on the size and performance of the magnetic circuit, and helps to improve the sound quality experience of the speaker module. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0041] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0042] FIG2 a is a schematic structural diagram of a speaker module in the electronic device shown in FIG1 ;

[0043] FIG2b is a schematic structural diagram of the speaker module shown in FIG2a at another angle;

[0044] FIG3 is a schematic diagram of the exploded structure of the speaker module shown in FIG2b;

[0045] FIG4 is a schematic structural diagram of the first housing in the speaker module shown in FIG3 ;

[0046] FIG5a is a schematic structural diagram of the second housing in the speaker module shown in FIG3;

[0047] FIG5b is a schematic structural diagram of the second housing shown in FIG5a at another angle;

[0048] FIG6 is a schematic structural diagram of the speaker module shown in FIG2b after being cut along II;

[0049] FIG7 is a schematic structural diagram of the speaker module shown in FIG2b after being cut along II-II;

[0050] FIG8 is a schematic structural diagram of the electroacoustic transducer in the speaker module shown in FIG3 ;

[0051] FIG9 is a schematic diagram of the exploded structure of the electroacoustic transducer shown in FIG8 ;

[0052] FIG10 a is a schematic structural diagram of a magnetic circuit assembly in the electroacoustic transducer shown in FIG9 ;

[0053] FIG10b is a schematic structural diagram of the magnetic circuit assembly shown in FIG10a at another angle;

[0054] FIG11 is a schematic diagram of the exploded structure of the magnetic circuit assembly shown in FIG10b;

[0055] FIG12 is a schematic structural diagram of the vibration component in the electroacoustic transducer shown in FIG9 at another angle;

[0056] FIG13 is a schematic diagram of the exploded structure of the vibration assembly shown in FIG12;

[0057] FIG14 is a schematic cross-sectional view of the electroacoustic transducer shown in FIG8 taken along line III-III;

[0058] FIG15 is a schematic cross-sectional view of the electroacoustic transducer shown in FIG8 taken along line IV-IV;

[0059] FIG16a is a schematic structural diagram of an isolation component in the speaker module shown in FIG3 under one embodiment;

[0060] FIG16b is a schematic structural diagram of the isolation assembly shown in FIG16a at another angle;

[0061] FIG17 is a schematic structural diagram of an isolation component in the speaker module shown in FIG3 under another embodiment;

[0062] FIG18 is a schematic cross-sectional view of the isolation assembly shown in FIG17 taken along line VV;

[0063] FIG19a is a schematic structural diagram of an isolation component of a speaker module in a second electronic device provided by an embodiment of the present application;

[0064] FIG19b is a schematic structural diagram of the isolation assembly shown in FIG19a at another angle;

[0065] FIG20 is a schematic structural diagram of the speaker module in the second electronic device provided in an embodiment of the present application after being cut open along point II. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0067] Please refer to FIG1 , which is a schematic structural diagram of an electronic device 1000 provided in an embodiment of the present application.

[0068] The electronic device 1000 may be a personal computer (PC), a laptop, a tablet computer, a television, a multimedia player, an e-book reader, a vehicle-mounted device, a mobile phone, a wearable device, or a walkman, etc., any electronic product capable of producing audio. This embodiment of the present application is described using the example of the electronic device 1000 being a mobile phone.

[0069] The electronic device 1000 includes a housing 100, a display module 200, a circuit board 300, a camera module 400 and a speaker module 500. The display module 200 is mounted on the housing 100, and the circuit board 300, the camera module 400 and the speaker module 500 are all mounted on the inner side of the housing 100. The display module 200, the camera module 400 and the camera module are all electrically connected to the circuit board 300. Among them, the circuit board 300 can be the mainboard of the electronic device 1000. Functional devices such as a processor or a memory can be installed on the circuit board 300. The processor is electrically connected to the display module 200, the camera module 400 and the speaker module 500 through the circuit board 300, and can send electrical signals to the display module 200, the camera module 400 and the speaker module 500 through the circuit board 300.

[0070] The housing 100 includes a frame 110 and a back cover 120, and the back cover 120 is fixedly connected to one side of the frame 110. The frame 110 is provided with a speaker hole 1101, and the speaker hole 1101 runs through the inner and outer sides of the frame 110. Among them, the speaker hole 1101 is located at the bottom of the frame 110. Exemplarily, there are five speaker holes 1101, and the five speaker holes 1101 are arranged at intervals. In some other embodiments, the speaker hole 1101 may also be provided on the back cover 120 or at other positions of the frame 110, and / or, the speaker holes 1101 may be less than five or more than five. The embodiment of the present application does not specifically limit the position and number of the speaker holes 1101.

[0071] It should be noted that the directional words such as "top" and "bottom" used in the embodiment of the present application to describe the electronic device 1000 are mainly based on the orientation of the user holding the electronic device 1000. When the user holds the electronic device 1000, the direction facing the top is referred to as "top" and the direction facing the bottom is referred to as "bottom". It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the orientation of the electronic device 1000 in actual application scenarios.

[0072] The display module 200 is mounted on the side of the frame 110 facing away from the back cover 120. In other words, the display module 200 and the back cover 120 are located on opposite sides of the frame 110. The display module 200 can display information such as images or videos based on the electrical signals transmitted by the circuit board 300. When the user holds the electronic device 1000, the display module 200 is placed toward the user and the back cover 120 is placed away from the user. The display module 200 is provided with a camera hole 2001, which passes through the display module 200 along the thickness direction of the display module 200. The camera hole 2001 is located at the top of the display module 200.

[0073] Exemplarily, the display module 200 may be a liquid crystal display (LCD), an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (OLED) display, a micro organic light-emitting diode (OLED) display, a micro organic light-emitting diode (OLED) display, or a quantum dot light-emitting diode (QLED) display.

[0074] The camera module 400 is located at the top of the electronic device 1000. Among them, the camera module 400 is used as the front camera module of the electronic device 1000. The camera module 400 can receive the electrical signal transmitted by the circuit board 300, and collect light through the camera hole 2001 according to the electrical signal to shoot images or videos. In some other embodiments, the electronic device 1000 may further include another camera module (not shown), and the other camera module can be used as the rear camera module of the electronic device 1000. At this time, the back cover 120 may also be provided with a camera hole (not shown), and images or videos are shot through the camera hole of the back cover 120.

[0075] The speaker module 500 is located at the bottom of the electronic device 1000. It serves as the speaker for the electronic device 1000. The speaker module 500 receives electrical signals from the circuit board 300 and vibrates in response to these signals to produce sound. The sound produced by the speaker module 500 is transmitted to the outside of the housing 100 through the speaker hole 1101, thereby enabling the sound playback function of the electronic device 1000.

[0076] In some other embodiments, the electronic device 1000 may further include another speaker module (not shown), which is located on the top of the electronic device 1000 and serves as a receiver for the electronic device 1000. In this case, a receiver hole (not shown) is further provided on the top of the display module 200, and the sound emitted by the other speaker module can be transmitted to the outside of the housing 100 through the receiver hole, thereby realizing the sound playback function of the electronic device 1000.

[0077] Please refer to Figures 2a, 2b, and 3. Figure 2a is a schematic structural diagram of the speaker module 500 in the electronic device 1000 shown in Figure 1. Figure 2b is a schematic structural diagram of the speaker module 500 shown in Figure 2a at another angle. Figure 3 is a schematic exploded structural diagram of the speaker module 500 shown in Figure 2b. For ease of description, the length direction of the speaker module 500 is defined as the X-axis direction, the width direction of the speaker module 500 is defined as the Y-axis direction, and the thickness direction of the speaker module 500 is defined as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

[0078] The speaker module 500 includes a first shell 510, a second shell 520, an electroacoustic transducer 530, a connecting circuit board (not shown) and an isolation assembly 540. The first shell 510 is provided with a sound outlet 5101, and the sound outlet 5101 is connected to the speaker hole 1101 (as shown in FIG1 ). The second shell 520 is installed on the first shell 510 and is enclosed with the first shell 510 to form a sound cavity (not shown). The sound cavity is connected to the sound outlet 5101. The electroacoustic transducer 530 is installed in the sound cavity. One end of the connecting circuit board is located in the sound cavity and is electrically connected to the electroacoustic transducer 530, and the other end is located outside the sound cavity and is electrically connected to the circuit board 300 (as shown in FIG1 ). The connecting circuit board can transmit the electrical signal transmitted by the circuit board 300 to the electroacoustic transducer 530, and the electroacoustic transducer 530 can convert the electrical signal into a sound signal. The sound is transmitted to the outside of the shell 100 (as shown in Figure 1) through the sound outlet 5101 and the speaker hole 1101 in turn, thereby realizing the sound generation of the electronic device 1000 (as shown in Figure 1).

[0079] Please refer to FIG. 4 , which is a schematic structural diagram of the first housing 510 in the speaker module 500 shown in FIG. 3 .

[0080] The sound outlet 5101 includes a first opening (not labeled) and a second opening (not labeled) arranged in opposite directions. The first opening is located on the side of the first housing 510. The second opening is located on the inner surface of the first housing 510. The diameter of the sound outlet 5101 gradually increases from the second opening toward the first opening. In other words, the sound outlet 5101 is horn-shaped to enhance the loudness of the sound produced by the speaker module 500.

[0081] The first housing 510 is provided with a mounting groove 5102 and a receiving groove 5103. The mounting groove 5102 opens on the lower surface of the first housing 510. The mounting groove 5102 is recessed from the lower surface of the first housing 510 toward the upper surface (in the positive direction of the Z axis as shown). The receiving groove 5103 opens on the bottom wall of the mounting groove 5102. The receiving groove 5103 is recessed from the bottom wall of the mounting groove 5102 toward the upper surface of the first housing 510.

[0082] The bottom wall of the receiving groove 5103 is provided with a mounting boss 511, which protrudes from the bottom wall of the receiving groove 5103 in the direction of the lower surface of the first shell 510 (the negative direction of the Z axis in the figure) and is fixedly connected to the side wall of the receiving groove 5103. Specifically, the mounting boss 511 is located on the left side of the receiving groove 5103. Among them, the lower surface of the mounting boss 511 is located between the bottom wall of the mounting groove 5102 and the bottom wall of the receiving groove 5103. The mounting boss 511 is provided with a receiving space 5111, and the opening of the receiving space 5111 is located on the lower surface of the mounting boss 511. The receiving space 5111 is recessed from the lower surface of the mounting boss 511 in the direction of the bottom wall of the receiving groove 5103 (the positive direction of the Z axis in the figure). The receiving space 5111 is connected to the sound outlet 5101.

[0083] It should be noted that the directional words such as "up", "down", "left", "right", "front" and "back" used in this application to describe the speaker module 500 are all described based on the orientation of the speaker module 500 shown in Figure 2a, with the orientation facing the positive direction of the Z axis being "up", the orientation facing the negative direction of the Z axis being "down", the orientation facing the negative direction of the X axis being "left", the orientation facing the positive direction of the X axis being "right", the orientation facing the positive direction of the Y axis being "back", and the orientation facing the negative direction of the Y axis being "front". They do not constitute a limitation on the speaker module 500 in actual applications.

[0084] Please refer to FIG. 5 a and FIG. 5 b . FIG. 5 a is a schematic structural diagram of the second housing 520 in the speaker module 500 shown in FIG. 3 , and FIG. 5 b is a schematic structural diagram of the second housing 520 shown in FIG. 5 a at another angle.

[0085] The second shell 520 is provided with an avoidance hole 5201, a first mounting groove 5202 and an injection hole 5203. The avoidance hole 5201 and the first mounting groove 5202 are both located on the left side of the second shell 520. The opening of the avoidance hole 5201 is located on the upper surface of the second shell 520. The avoidance hole 5201 is recessed from the upper surface of the second shell 520 toward the lower surface (the negative direction of the Z axis in the figure) and passes through the lower surface of the second shell 520. That is, the avoidance hole 5201 passes through the second shell 520 along the thickness direction of the second shell 520 (the Z axis direction in the figure). The first mounting groove 5202 is arranged around the avoidance hole 5201 and is connected to the avoidance hole 5201. The opening of the first mounting groove 5202 is located on the lower surface of the second shell 520. The first mounting groove 5202 is recessed from the lower surface of the second shell 520 toward the upper surface (the positive direction of the Z axis in the figure) and passes through the hole wall of the avoidance hole 5201. The bottom wall of the first installation groove 5202 is a plane.

[0086] The injection hole 5203 is located on the right side of the second housing 520 and is spaced apart from the first mounting groove 5202. The opening of the injection hole 5203 is located on the lower surface of the second housing 520. The injection hole 5203 is recessed from the lower surface of the second housing 520 toward the upper surface (in the positive Z-axis direction as shown) and extends through the upper surface of the second housing 520. In other words, the injection hole 5203 extends through the second housing 520 along its thickness (in the Z-axis direction as shown).

[0087] The second shell 520 includes a shell body 521 and a reinforcement 522, and the reinforcement 522 is fixedly connected to the shell body 521. The shell body 521 is provided with a mounting through hole 5211 and an injection hole 5203. The mounting through hole 5211 passes through the shell body 521 along the thickness direction of the shell body 521 (Z-axis direction in the figure). The reinforcement 522 is fixedly connected to the upper surface of the shell body 521 and is arranged around the mounting through hole 5211. The reinforcement 522 extends relative to the hole wall of the mounting through hole 5211 and is enclosed with the hole wall of the mounting through hole 5211 to form a first mounting groove 5202. Among them, the middle part of the mounting through hole 5211 forms an avoidance hole 5201, the edge of the mounting through hole 5211 forms the first mounting groove 5202, and the lower surface of the reinforcement 522 forms the bottom wall of the first mounting groove 5202.

[0088] In addition, the shell body 521 is also provided with a mounting ridge 523 and a first positioning column 524. The mounting ridge 523 and the first positioning column 524 are both provided on the upper surface of the shell body 521 (i.e., the upper surface of the second shell 520), and both protrude from the upper surface of the shell body 521 in a direction away from the lower surface (the positive direction of the Z axis in the figure). Specifically, the mounting ridge 523 is provided on the edge of the upper surface of the second shell 520 and is arranged around the second shell 520. The first positioning column 524 is connected between the mounting ridge 523 and the reinforcement 522. Among them, the surface of the first positioning column 524 facing the avoidance hole 5201 can be flush with the hole wall surface of the avoidance hole 5201.

[0089] Exemplarily, there are eight first positioning posts 524, which are arranged around the avoidance hole 5201 and spaced apart from each other. Four first positioning posts 524 are located to the left of the avoidance hole 5201, and four first positioning posts 524 are located to the right of the avoidance hole 5201. In other embodiments, there may be fewer than eight or more first positioning posts 524, and this application does not impose any specific limitation on the number of first positioning posts 524.

[0090] In this embodiment, the housing body 521 is a plastic member, and the reinforcement member 522 is a steel sheet. The housing body 521 and reinforcement member 522 can be integrally formed. That is, the second housing 520 is an integrally formed structural member. For example, the second housing 520 can be formed by in-mold injection molding.

[0091] It can be understood that since the reinforcement 522 is a steel sheet made of steel and the lower surface of the reinforcement 522 forms the bottom wall of the first installation groove 5202, it can ensure the structural stability of the first installation groove 5202 and enhance the overall strength of the second shell 520.

[0092] In some other embodiments, the shell body 521 may also be made of metal materials or other materials, and / or the reinforcement 522 may also be made of metal materials or non-metal materials other than steel.

[0093] Please refer to Figures 6 and 7. Figure 6 is a schematic diagram of the structure of speaker module 500 shown in Figure 2b, cut along line II. Figure 7 is a schematic diagram of the structure of speaker module 500 shown in Figure 2b, cut along line II-II. Here, "cut along line II" refers to cutting along the plane containing line II, and "cut along line II-II" refers to cutting along the plane containing line II-II. Similar descriptions hereinbelow shall be understood in the same manner.

[0094] The second shell 520 is installed in the mounting groove 5102 of the first shell 510. Specifically, the mounting ridge 523 of the second shell 520 is installed in the mounting groove 5102, so that the second shell 520 and the first shell 510 are relatively fixed and enclosed to form the sound cavity 5001. The avoidance hole 5201 (as shown in Figure 5a) and the injection hole 5203 are both connected to the sound cavity 5001. Exemplarily, the mounting ridge 523 can be installed in the mounting groove 5102 by ultrasonic welding. In some other embodiments, the mounting ridge 523 can also be installed in the mounting groove 5102 by bonding.

[0095] The lower surface of the second housing 520 is flush with the lower surface of the first housing 510. The second housing 520 completely reuses the space of the first housing 510 along the Z-axis, thereby reducing the size of the speaker module 500 along the Z-axis and facilitating a lightweight and thin design of the speaker module 500. In other embodiments, the lower surface of the second housing 520 may be recessed relative to the lower surface of the first housing 510, or it may be protruding relative to the lower surface of the first housing 510.

[0096] Please refer to FIG. 8 and FIG. 9 . FIG. 8 is a schematic structural diagram of the electroacoustic transducer 530 in the speaker module 500 shown in FIG. 3 , and FIG. 9 is a schematic exploded structural diagram of the electroacoustic transducer 530 shown in FIG. 8 .

[0097] In this embodiment, the electroacoustic transducer 530 is the core of a dynamic speaker. It includes a frame 10, a magnetic circuit assembly 20, and a vibration assembly 30. The magnetic circuit assembly 20 and the vibration assembly 30 are mounted on opposite sides of the frame 10. The frame 10 supports the magnetic circuit assembly 20 and the vibration assembly 30. The magnetic circuit assembly 20 provides a driving magnetic field. The vibration assembly 30 vibrates relative to the frame 10 under the influence of the driving magnetic field.

[0098] The basin stand 10 includes a frame 11, legs 12, and second positioning posts 13. The legs 12 and second positioning posts 13 are fixedly connected to the frame 11. The frame 11, legs 12, and second positioning posts 13 may be integrally formed. In other embodiments, the frame 11, legs 12, and second positioning posts 13 may also be assembled to form an integrated structure.

[0099] The frame 11 is generally square in shape. It includes two first frames 14 and two second frames 15. The first frames 14 extend along the X-axis and are parallel to and spaced apart from each other along the Y-axis. The second frames 15 extend along the Y-axis and are parallel to and spaced apart from each other along the X-axis. The second frames 15 are fixedly connected between the first frames 14.

[0100] The support leg 12 and the second positioning column 13 are both fixedly connected to the lower surface of the frame 11, and both protrude from the lower surface of the frame 11 in a direction away from the upper surface (the negative direction of the Z axis in the figure). The support leg 12 is provided with a mounting notch 121, and the opening of the mounting notch 121 is located on the lower surface of the support leg 12. The mounting notch 121 is recessed from the lower surface of the support leg 12 in the direction of the frame 11 (the positive direction of the Z axis in the figure), and passes through the outer surface, left side and right side of the support leg 12. Among them, the bottom wall surface of the mounting notch 121 is a plane. Exemplarily, there are four support legs 12, and every two support legs 12 are fixedly connected to a first frame 14, and are arranged at intervals along the X-axis direction.

[0101] In some other embodiments, the number of the supporting legs 12 may be less than four or more than four, and / or at least part of the supporting legs 12 may also be provided on the second frame 15 . This application does not impose any specific limitation on the number and position of the supporting legs 12 .

[0102] Second positioning posts 13 are spaced apart from support legs 12. The inner surfaces of second positioning posts 13 are flush with the inner surface of frame 11. Exemplarily, there are six second positioning posts 13. Every three second positioning posts 13 are fixedly connected to one second frame 15 and spaced apart along the Y-axis.

[0103] In some other embodiments, the number of the second positioning columns 13 may be less than six or more than six, and / or at least some of the second positioning columns 13 may be fixedly connected to the first frame 14 . This application does not impose any specific restrictions on the number and position of the second positioning columns 13 .

[0104] Please refer to Figures 10a, 10b and 11. Figure 10a is a structural schematic diagram of the magnetic circuit assembly 20 in the electroacoustic transducer 530 shown in Figure 9, Figure 10b is a structural schematic diagram of the magnetic circuit assembly 20 shown in Figure 10a at another angle, and Figure 11 is a decomposed structural schematic diagram of the magnetic circuit assembly 20 shown in Figure 10b.

[0105] The magnetic circuit assembly 20 includes a lower pole piece 21, a central magnet 22, two first side magnets 23, two second side magnets 24, a central pole piece 25, and an annular pole piece 26. The central magnet 22, two first side magnets 23, and two second side magnets 24 are all mounted on the lower pole piece 21, the central pole piece 25 is mounted on the central magnet 22, and the annular pole piece 26 is mounted on the two first side magnets 23 and two second side magnets 24.

[0106] The lower pole piece 21 is provided with a second mounting groove 211 and a retaining notch 212. The opening of the second mounting groove 211 is located on the lower surface of the lower pole piece 21. The second mounting groove 211 is recessed from the lower surface of the lower pole piece 21 toward the upper surface (in the positive direction of the Z axis in the figure) and extends through the circumference of the lower pole piece 21. The second mounting groove 211 is an annular groove and is provided around the edge of the lower pole piece 21. The bottom wall of the second mounting groove 211 is flat.

[0107] The retaining notch 212 is connected to the second mounting groove 211. The opening of the retaining notch 212 is located on the upper surface of the lower pole piece 21. The retaining notch 212 is recessed from the upper surface of the lower pole piece 21 toward the lower surface and extends through the lower surface of the lower pole piece 21. In other words, the retaining notch 212 extends through the lower pole piece 21 along its thickness. In addition, the retaining notch 212 also extends through the peripheral side surface of the lower pole piece 21 and the wall surface of the second mounting groove 211.

[0108] Illustratively, there are four retaining notches 212, two of which are located on the front side of the lower pole piece 21 and spaced apart along the X-axis direction, and the other two of which are located on the rear side of the lower pole piece 21 and spaced apart along the X-axis direction. In other embodiments, the retaining notches 212 may be located at other positions on the lower pole piece 21, and / or the number of retaining notches 212 may be less than or greater than four. The embodiment of the present application does not impose any specific limitation on the position and number of the retaining notches 212.

[0109] The central magnet 22, two first side magnets 23, and two second side magnets 24 are all mounted on the upper surface of the lower pole piece 21. Specifically, the central magnet 22 is mounted in the central area of ​​the upper surface of the lower pole piece 21, and the two first side magnets 23 and two second side magnets 24 are all mounted in the edge areas of the upper surface of the lower pole piece 21. Along the X-axis, the two first side magnets 23 are located on opposite sides of the central magnet 22 and are spaced apart from the central magnet 22. Along the Y-axis, the two second side magnets 24 are located on opposite sides of the central magnet 22 and are spaced apart from the central magnet 22. Each second side magnet 24 is located between two retaining notches 212. A first gap (not shown) is formed between each first side magnet 23 and the central magnet 22, and a second gap (not shown) is formed between each second side magnet 24 and the central magnet 22. Exemplarily, the central magnet 22, the two first side magnets 23, and the two second side magnets 24 can all be mounted on the lower pole piece 21 by bonding.

[0110] The central pole piece 25 is mounted on the upper surface of the central magnet 22, and the annular pole piece 26 is mounted on the upper surfaces of the two first side magnets 23 and the two second side magnets 24, surrounding the central pole piece 25 and spaced apart from the central pole piece 25. For example, the central pole piece 25 can be mounted on the central magnet 22 by bonding, and the annular pole piece 26 can be mounted on the two first side magnets 23 and the two second side magnets 24 by bonding.

[0111] In this embodiment, the annular pole piece 26 includes a connecting frame portion 261, two first pole piece portions 262, and two second pole piece portions 263. The two first pole piece portions 262 and the two second pole piece portions 263 are fixedly connected to the inner surface of the connecting frame portion 261. Along the X-axis direction, the two first pole piece portions 262 are spaced apart and arranged opposite to each other. Along the Y-axis direction, the two second pole piece portions 263 are spaced apart and arranged opposite to each other. Specifically, each first pole piece portion 262 is mounted on the upper surface of a first side magnet 23 and is spaced apart from the center pole piece 25. Each second pole piece portion 263 is mounted on the upper surface of a second side magnet 24 and is spaced apart from the center pole piece 25. A third gap (not marked in the figure) is formed between each first pole piece portion 262 and the center pole piece 25, and the third gap is connected to the first gap. A fourth gap (not marked in the figure) is formed between each second pole piece portion 263 and the center pole piece 25, and the fourth gap is connected to the second gap.

[0112] Please refer to FIG. 12 and FIG. 13 . FIG. 12 is a schematic structural diagram of the vibration component 30 in the electroacoustic transducer 530 shown in FIG. 9 at another angle, and FIG. 13 is a schematic exploded structural diagram of the vibration component 30 shown in FIG. 12 .

[0113] The vibration assembly 30 includes a sound diaphragm 31, a voice coil 32 and four flexible circuit boards 33. The voice coil 32 is fixedly connected to the sound diaphragm 31, and the four flexible circuit boards 33 are all fixedly connected to the voice coil 32. The sound diaphragm 31 includes a diaphragm 34 and a dome 35, and the dome 35 is fixedly connected to the diaphragm 34. The diaphragm 34 is roughly rectangular ring-shaped. The diaphragm 34 includes a first fixed portion 341, a vibration portion 342 and a second fixed portion 343. The vibration portion 342 and the second fixed portion 343 are both located on the outside of the first fixed portion 341. The vibration portion 342 is fixedly connected between the first fixed portion 341 and the second fixed portion 343. The cross-section of the vibration portion 342 is formed in an arc shape or an approximately arc shape. Exemplarily, the vibration portion 342 protrudes in a direction away from the upper surface of the first fixed portion 341 and the second fixed portion 343 (in the negative direction of the Z axis as shown in the figure). In some other embodiments, the vibration portion 342 may also protrude in a direction away from the lower surfaces of the first fixing portion 341 and the second fixing portion 343 (in the positive direction of the Z axis as shown in the figure).

[0114] The dome 35 is fixedly connected to the lower surface of the first fixing portion 341. When the vibrating portion 342 deforms under the action of an external force, it can drive the first fixing portion 341 and the dome 35 to move relative to the second fixing portion 343. For example, the dome 35 can be fixedly connected to the first fixing portion 341 by bonding. In other embodiments, the dome 35 can also be fixedly connected to the upper surface of the first fixing portion 341.

[0115] The voice coil 32 is fixedly connected to the lower surface of the dome 35. In this embodiment, the voice coil 32 is a rounded rectangular shape. The voice coil 32 includes four straight sides 321 and four rounded corners 322. Each rounded corner 322 is fixedly connected between two straight sides 321.

[0116] Four flexible circuit boards 33 are fixedly connected to the four rounded corners 322 of the voice coil 32. In this embodiment, the four flexible circuit boards 33 have the same structure. Each flexible circuit board 33 includes a first fixing portion 331, a connecting branch 332, and a second fixing portion 333. The connecting branch 332 and the second fixing portion 333 are both located outside the first fixing portion 331, and the connecting branch 332 is fixedly connected between the first fixing portion 331 and the second fixing portion 333. The first fixing portion 331 of each flexible circuit board 33 is fixedly connected to one of the rounded corners 322 of the voice coil 32.

[0117] Please refer to Figures 14 and 15. Figure 14 is a schematic cross-sectional structural diagram of the electroacoustic transducer 530 shown in Figure 8 after being cut along III-III, and Figure 15 is a schematic cross-sectional structural diagram of the electroacoustic transducer 530 shown in Figure 8 after being cut along IV-IV.

[0118] The magnetic circuit assembly 20 is mounted on the underside of the basin frame 10. Specifically, the lower pole piece 21 is fixedly connected to the four legs 12 and spaced apart from the frame 11. Each leg 12, with its end facing away from the frame 11, snaps into a retaining notch 212 of the lower pole piece 21, securing it to the lower pole piece 21. Furthermore, the mounting notch 121 of each leg 12 communicates with the second mounting slot 211 of the lower pole piece 21.

[0119] The central magnet 22, the two first side magnets 23, and the two second side magnets 24 are all located on the side of the lower pole piece 21 facing the frame 11. Specifically, the two first side magnets 23 are located between the two first frames 14, and the two second side magnets 24 are located on the top sides of the two second frames 15. The second positioning post 13 is located at the edge of the electroacoustic transducer 530 and is spaced apart from the first side magnets 23.

[0120] The vibration assembly 30 is mounted on the upper side of the basin frame 10. Specifically, the sound diaphragm 31 is fixedly connected to the upper surface of the frame 11 and is spaced apart from the lower pole piece 21. The second fixing portion 343 of the diaphragm 34 is fixedly connected to the upper surface of the frame 11. The vibration portion 342 of the diaphragm 34 protrudes toward the basin frame 10 and is spaced apart from the annular pole piece 26. Exemplarily, the second fixing portion 343 of the diaphragm 34 can be fixedly connected to the upper surface of the frame 11 by bonding.

[0121] The voice coil 32 is located on the inner side of the frame 11. One end of the voice coil 32 away from the sound diaphragm 31 is partially located in the first gap and the third gap, and partially located in the second gap and the fourth gap. That is, the end of the voice coil 32 away from the sound diaphragm 31 is located in the magnetic field provided by the magnetic circuit assembly 20. The second fixed parts 343 of the four flexible circuit boards 33 (as shown in Figure 13) are located at the four corners of the frame 11 and are fixedly connected to the lower surface of the frame 11. Among them, the four flexible circuit boards 33 are all electrically connected to the connecting circuit board of the speaker module 500. The four flexible circuit boards 33 transmit the electrical signals transmitted by the connecting circuit board to the voice coil 32. The voice coil 32 moves up and down along the Z-axis direction and cuts the magnetic lines of force of the magnetic field provided by the magnetic circuit assembly 20, thereby driving the sound diaphragm 31 and the flexible circuit board 33 to vibrate.

[0122] Referring to Figures 6 and 7, the electroacoustic transducer 530 is mounted on the first shell 510. Specifically, the electroacoustic transducer 530 is mounted in the receiving groove 5103 (as shown in Figure 4). The electroacoustic transducer 530 is mounted on the mounting boss 511. The basin frame 10 is mounted in the receiving space 5111 (as shown in Figure 4), and the second positioning column 13 is spaced apart from the first positioning column 524 of the second shell 520. Exemplarily, the size of the gap between the second positioning column 13 and the first positioning column 524 of the second shell 520 is less than 0.3 mm.

[0123] The lower pole piece 21 is disposed through the avoidance hole 5201 (as shown in FIG5 a ) and is spaced apart from the wall of the avoidance hole 5201. The lower surface of the lower pole piece 21 is exposed relative to the lower surface of the second housing 520. Exemplarily, the lower surface of the lower pole piece 21 is flush with the lower surface of the second housing 520, allowing the electroacoustic transducer 530 to fully reuse the space in the Z-axis direction between the first and second housings 510, 520, thereby contributing to a lightweight and thin design for the speaker module 500.

[0124] In other embodiments, the lower surface of the lower electrode 21 may be located below the lower surface of the second housing 520. That is, the lower surface of the lower electrode 21 is recessed relative to the lower surface of the second housing 520. Alternatively, the lower electrode 21 may be located above the lower surface of the second housing 520. That is, the lower surface of the lower electrode 21 is protruding relative to the lower surface of the second housing 520.

[0125] The diaphragm 31 is located in the housing 5111. The diaphragm 31 divides the acoustic cavity 5001 into a front acoustic cavity 5002 and a rear acoustic cavity 5003. The front acoustic cavity 5002 is formed between the diaphragm 31 and the first housing 510. The front acoustic cavity 5002 communicates with the sound outlet 5101. The side of the diaphragm 31 facing away from the front acoustic cavity 5002 forms the rear acoustic cavity 5003. The rear acoustic cavity 5003 communicates with the avoidance hole 5201 and the injection hole 5203.

[0126] In addition, the first housing 510 or the second housing 520 is further provided with a leakage hole (not shown). The leakage hole connects the rear sound cavity 5003 and the exterior of the speaker module 500, thereby ensuring air pressure balance between the rear sound cavity 5003 and the exterior of the speaker module 500. This prevents deformation of the sound diaphragm 31 due to unstable air pressure and other problems, which could affect the sound quality of the speaker module 500, thereby improving the sound quality experience of the speaker module 500.

[0127] In this embodiment, the rear acoustic cavity 5003 is filled with sound-absorbing particles (not shown). The sound-absorbing particles expand the volume of the rear acoustic cavity 5003 and enhance the sound quality of the speaker module 500. The particle size of the sound-absorbing particles is larger than the gap between the second positioning post 13 and the first positioning post 524 of the second housing 520. For example, the sound-absorbing particles may be bass powder, with a particle size between 0.2 mm and 0.3 mm.

[0128] The sound-absorbing particles can be injected into the rear acoustic cavity 5003 through the injection hole 5203. Furthermore, the speaker module 500 also includes a sealing member 550. After the sound-absorbing particles are injected into the rear acoustic cavity 5003 through the injection hole 5203, the sealing member 550 seals the injection hole 5203 to prevent leakage of the sound-absorbing particles. For example, the sealing member 550 can be made of a material such as plastic.

[0129] It can be understood that in the speaker module 500 shown in this embodiment, the second shell 520 and the electroacoustic transducer 530 completely reuse the space of the first shell 510 in the thickness direction of the speaker module 500 (Z-axis direction in the figure), which is equivalent to reducing the space occupied by the second shell 520 and the electroacoustic transducer 530 in the thickness direction of the speaker module 500, which is conducive to achieving a lightweight design of the speaker module 500.

[0130] In addition, filling the rear sound cavity 5003 with sound-absorbing particles realizes the acoustic expansion of the rear sound cavity 5003, which is equivalent to expanding the volume of the rear sound cavity 5003, helping to achieve better low-frequency external playback performance of the speaker module 500 and improving the sound experience of the speaker module 500.

[0131] Please refer to Figures 16a and 16b. Figure 16a is a structural diagram of the isolation component 540 in the speaker module 500 shown in Figure 3 under one embodiment, and Figure 16b is a structural diagram of the isolation component 540 shown in Figure 16a at another angle.

[0132] The isolation assembly 540 includes a fixed ring 40 and a breathable isolation member 50, wherein the breathable isolation member 50 is fixedly connected to the fixed ring 40. In this embodiment, the fixed ring 40 is generally rectangular. The fixed ring 40 can be a steel sheet made of steel, and the thickness of the fixed ring 40 is 0.1 mm. In other embodiments, the fixed ring 40 can also be made of materials such as plastic, and / or the thickness of the fixed ring 40 can also be greater than 0.1 mm or less than 0.1 mm. This application does not impose any specific restrictions on the material and thickness of the fixed ring 40.

[0133] The breathable spacer 50 is fixedly connected to the upper surface of the fixing ring 40. The breathable spacer 50 is provided with a plurality of air holes (not shown). The plurality of air holes penetrate the breathable spacer 50 along the thickness direction of the breathable spacer 50 and are spaced apart from each other. Air can flow between the inner and outer sides of the breathable spacer 50 through the plurality of air holes. The aperture of the air hole is 0.1 mm. In other embodiments, the aperture of the air hole can also be other values, as long as the aperture of the air hole is smaller than the aperture of the sound-absorbing particles.

[0134] In this embodiment, the breathable isolation member 50 is cylindrical. The breathable isolation member 50 includes two first isolation portions 51 and two second isolation portions 52. The two first isolation portions 51 both extend in the X-axis direction, and are spaced and arranged oppositely along the Y-axis direction. The two second isolation portions 52 both extend in the Y-axis direction, and are spaced and arranged oppositely along the X-axis direction. The two second isolation portions 52 are both fixedly connected between the two first isolation portions 51. Among them, each first isolation portion 51 is provided with an avoidance notch 501. The avoidance notch 501 passes through the first isolation portion 51 along the thickness direction of the first isolation portion 51, and passes through the lower surface of the first isolation portion 51.

[0135] In some other embodiments, the first isolation portion 51 may not be provided with the avoidance notch 501, and / or the second isolation portion 52 may also be provided with the avoidance notch 501. In this case, the avoidance notch 501 passes through the second isolation portion 52 along the thickness direction of the second isolation portion 52 and passes through the lower surface of the second isolation portion 52. The embodiment of the present application does not impose specific restrictions on the number and position of the avoidance notch 501.

[0136] In this embodiment, the breathable spacer 50 is a metal mesh made of a metal material. The ventilation holes are the mesh holes of the metal mesh. The breathable spacer 50 can be fixedly connected to the upper surface of the fixing ring 40 by welding. The angle between the breathable spacer 50 and the fixing ring 40 is 90 degrees. In other embodiments, the breathable spacer 50 can also be a sheet structure made of metal or other materials. In this case, the ventilation holes can be formed by punching holes through the breathable spacer 50.

[0137] Please refer to Figures 17 and 18. Figure 17 is a structural schematic diagram of the isolation component 540 in the speaker module 500 shown in Figure 3 under another embodiment, and Figure 18 is a cross-sectional structural schematic diagram of the isolation component 540 shown in Figure 17 taken along VV.

[0138] The difference between the isolation assembly 540 shown in this embodiment and the isolation assembly 540 shown in the above embodiment is that the breathable isolation member 50 includes a fixing portion 53 and an isolation portion 54, and the isolation portion 54 is fixedly connected to the upper surface of the fixing portion 53. The angle between the isolation portion 54 and the fixing portion 53 is 90 degrees. Exemplarily, the breathable isolation member 50 can be formed by bending a metal mesh. Specifically, the fixing portion 53 is fixedly connected to the upper surface of the fixing ring 40, and the isolation portion 54 is fixedly connected to the side of the fixing portion 53 away from the fixing ring 40.

[0139] It can be understood that compared with the isolation assembly 540 shown in the above embodiment, in the isolation assembly 540 shown in this embodiment, the contact area between the breathable isolation piece 50 and the fixing ring 40 is increased, which is beneficial to improving the assembly stability between the breathable isolation piece 50 and the fixing ring 40.

[0140] 6 and 7 , the isolation assembly 540 is mounted on the second housing 520 and the lower pole piece 21 of the electroacoustic transducer 530, and is arranged around the edge of the lower pole piece 21. Specifically, the fixing ring 40 is mounted on the first mounting groove 5202 of the second housing 520, the mounting notch 121 of the support leg 12 (as shown in FIG9 ), and the second mounting groove 211 of the lower pole piece 21. The lower surface of the fixing ring 40 is flush with the lower surface of the second housing 520 and the lower surface of the lower pole piece 21, so that the fixing ring 40 completely reuses the thickness of the second housing 520 along the Z-axis direction, avoiding the lower surface of the fixing ring 40 from protruding relative to the lower surface of the second housing 520 and the lower surface of the lower pole piece 21, which helps to achieve a lightweight design of the speaker module 500.

[0141] In some other embodiments, the lower surface of the fixing ring 40 may also be located on the upper side of the lower surface of the second shell 520 or the upper side of the lower surface of the lower pole piece 21, as long as the lower surface of the fixing ring 40 does not protrude relative to the lower surface of the second shell 520 and the lower surface of the lower pole piece 21.

[0142] In addition, the speaker module 500 also includes an adhesive layer (not shown). Part of the adhesive layer is bonded between the upper surface of the fixing ring 40 and the bottom wall of the first mounting groove 5202, part of the adhesive layer is bonded between the upper surface of the fixing ring 40 and the bottom wall of the second mounting groove 211, and part of the adhesive layer is bonded between the upper surface of the fixing ring 40 and the bottom wall of the mounting notch 121. In other words, the fixing ring 40 is attached to the bottom wall of the first mounting groove 5202 and the bottom wall of the second mounting groove 211 by bonding, thereby securing the fixing ring 40 to the first mounting groove 5202 and the second mounting groove 211.

[0143] It should be understood that since the bottom wall of the first mounting groove 5202, the bottom wall of the second mounting groove 211 and the bottom wall of the mounting notch 121 are all flat, when the fixing ring 40 is installed using the adhesive layer, the glue is easy to apply and easy to flatten, which not only can achieve high-quality bonding between the fixing ring 40 and the second shell 520 and the lower pole piece 21, but also can avoid the problem of glue overflow during the bonding process, which is conducive to achieving an ultra-thin design of the speaker module 500.

[0144] In some other embodiments, the fixing ring 40 can also be installed in the first mounting groove 5202 and the second mounting groove 211 by welding, or the fixing ring 40 can also be integrally formed with the second shell 520. In this case, the fixing ring 40 can be integrally formed with the reinforcement 522 of the second shell 520 (as shown in Figure 5b), that is, the fixing ring 40 and the reinforcement 522 can be different parts of a component, so as to simplify the manufacturing process of the speaker module 500 and reduce the production cost of the speaker module.

[0145] The breathable spacer 50 is located between the hole wall of the avoidance hole 5201 (as shown in FIG5 a) and the lower pole piece 21. The breathable spacer 50 surrounds the electroacoustic transducer 530 and is spaced apart from the electroacoustic transducer 530. The breathable spacer 50 isolates the sound-absorbing particles from the electroacoustic transducer 530, preventing the sound-absorbing particles from entering the electroacoustic transducer 530 and affecting the sound quality of the electroacoustic transducer 530. It is understandable that since the aperture of the breathable hole is smaller than the particle size of the sound-absorbing particles, the breathable spacer 50 can prevent the sound-absorbing particles from passing through the breathable spacer 50 and entering the interior of the electroacoustic transducer 530 while ensuring gas circulation.

[0146] In this embodiment, the breathable spacer 50 is located on the lower side of the frame 11 of the basin frame 10 and is arranged around the lower pole piece 21 and the two first side magnets 23. The breathable spacer 50 is spaced apart from the frame 11 to facilitate the connection of the circuit board through the gap between the breathable spacer 50 and the frame 11 to extend into the electroacoustic transducer 530 and electrically connect to the flexible circuit board 33. The gap size between the upper surface of the breathable spacer 50 and the frame 11 is smaller than the particle size of the sound-absorbing particles, for example, less than 0.1 mm, which can prevent the sound-absorbing particles from entering the interior of the electroacoustic transducer 530 through the gap between the breathable spacer 50 and the frame 11, thereby ensuring the sound quality of the speaker module 500.

[0147] In some other embodiments, the frame 11 may also be provided with a through hole (not shown), and the flexible circuit board 33 may be electrically connected to the connection circuit board of the speaker module 500 through the through hole of the frame 11, and / or, the breathable isolation member 50 may also be located on the outside of the frame 11 of the basin frame 10 and spaced apart from the frame 11. The embodiment of the present application does not impose any specific restrictions on the position of the breathable isolation member 50, as long as the breathable isolation member 50 can isolate the sound-absorbing particles and the electroacoustic transducer 530.

[0148] The two first isolating portions 51 (as shown in FIG16b ) of the breathable isolating member 50 are respectively located on the lower sides of the two first frames 14 (as shown in FIG9 ) of the frame 11, and the two second isolating portions 52 (as shown in FIG16b ) are respectively located on the lower sides of the two second frames 15 (as shown in FIG9 ) of the frame 11. Each avoidance notch 501 can avoid two legs 12 and a second side magnet 24 located between the two legs 12. The first positioning post 524 of the second shell 520 is located on the outside of the breathable isolating member 50 and is spaced apart from the breathable isolating member 50 to prevent the breathable isolating member 50 from deforming in a direction away from the electroacoustic transducer 530, thereby ensuring the reliability of the breathable isolating member 50. The second positioning column 13 is located on the inner side of the breathable isolation member 50 and is spaced apart from the breathable isolation member 50 to prevent the breathable isolation member 50 from deforming toward the electroacoustic transducer 530. This not only ensures the reliability of the use of the breathable isolation member 50, but also prevents the deformed breathable isolation member 50 from entering the interior of the electroacoustic transducer 530 and causing noise or abnormal vibration.

[0149] Furthermore, the breathable spacer 50 is positioned by the first positioning posts 524 and the second positioning posts 13 located on either side. The end of the breathable spacer 50 away from the fixing ring 40 does not need to be secured with glue, thus preventing glue from clogging the air holes and affecting ventilation efficiency, thereby improving the breathability of the breathable spacer 50. Furthermore, because the gap between the first positioning posts 524 and the second positioning posts 13 is smaller than the size of the sound-absorbing particles, even if the breathable spacer 50 deforms in a direction away from or toward the electroacoustic transducer 530, the sound-absorbing particles cannot enter the electroacoustic transducer 530 through the gap between the first positioning posts 524 and the second positioning posts 13, thus ensuring the sound quality experience of the speaker module 500.

[0150] It is understandable that in some other embodiments, the second positioning column 13 can also be arranged on other components of the electroacoustic transducer 530 such as the lower pole piece 21, the first side magnet 23 or the second side magnet 24. As long as the second positioning column 13 is located on the inner side of the breathable isolation member 50, it can prevent the breathable isolation member 50 from deforming toward the electroacoustic transducer 530.

[0151] When assembling the speaker module 500 shown in the embodiment of the present application, the electroacoustic transducer 530 is first installed in the receiving groove 5103 of the first shell 510, and then the second shell 520 is installed in the installation groove 5102 of the first shell 510, and then the isolation assembly 540 is installed in the second shell 520 and the electroacoustic transducer 530, and then sound-absorbing particles are filled into the rear sound cavity 5003 through the injection hole 5203 of the second shell 520. After the sound-absorbing particles are filled, the injection hole 5203 is sealed with a seal 550, and the assembly of the speaker module 500 is completed.

[0152] Please refer to Figures 19a, 19b and 20. Figure 19a is a structural schematic diagram of the isolation component 540 of the speaker module in the second electronic device provided in an embodiment of the present application. Figure 19b is a structural schematic diagram of the isolation component 540 shown in Figure 19a at another angle. Figure 20 is a structural schematic diagram of the speaker module 500 in the second electronic device provided in an embodiment of the present application after being cut along II.

[0153] The difference between the isolation assembly 540 shown in this embodiment and the isolation assembly 540 shown in the above embodiment is that the breathable isolation member 50 is not provided with an avoidance gap. The breathable isolation member 50 is arranged around the electroacoustic transducer 530. Specifically, the breathable isolation member 50 is arranged around the lower pole piece 21, two first side magnets 23 (as shown in Figure 7) and two second side magnets 24. Among them, each first isolation portion 51 is located on the outside of the two legs 12 and a second side magnet 24 located between the two legs 12. Each second isolation portion 52 is located on the outside of a first side magnet 23.

[0154] It should be understood that in existing speaker modules, the breathable isolation piece is often bonded to the bottom surface of the electroacoustic transducer, occupying the height of the electroacoustic transducer, which not only increases the thickness of the electroacoustic transducer and the speaker module, but also affects the magnetic circuit size and magnetic circuit performance in the electroacoustic transducer, and also affects the sealing size between the electroacoustic transducer and the second shell.

[0155] In the speaker module 500 shown in this application, the air-permeable spacer 50 is pre-fixed to the fixing ring 40, and the air-permeable spacer 50 is not directly mounted on the electroacoustic transducer 530. This not only does not affect the size of the electroacoustic transducer 530, but also helps achieve a lightweight and thin design for the speaker module 500. It also prevents the air-permeable spacer 50 from affecting the size and performance of the magnetic circuit, thereby improving the sound quality of the speaker module 500. In addition, because the fixing ring 40 is made of steel, the fixing ring 40 is relatively strong and can be made very thin, which allows the height of the air-permeable spacer 50 to be increased, thereby increasing the ventilation capacity of the air-permeable spacer 50.

[0156] The above description is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application; the embodiments of this application and the features of the embodiments can be combined with each other unless there is a conflict. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A speaker module, characterized in that: include: a first shell; a second shell, the second shell being mounted on the first shell and enclosing a sound cavity with the first shell, the second shell being provided with a relief hole, the relief hole communicating with the sound cavity and the outer side of the second shell; an electroacoustic transducer, the electroacoustic transducer being mounted in the sound cavity, the electroacoustic transducer comprising a lower pole piece and a sound diaphragm, the lower pole piece being passed through the avoidance hole and spaced apart from the hole wall of the avoidance hole, the sound diaphragm being spaced apart from the lower pole piece and dividing the sound cavity into a front sound cavity and a rear sound cavity; Sound-absorbing particles, the sound-absorbing particles filling the rear sound cavity; a fixing ring, the fixing ring being mounted on the second shell and the lower pole piece and being arranged around the edge of the lower pole piece; and a breathable spacer fixedly connected to the upper surface of the fixing ring and located between the hole wall of the avoidance hole and the lower pole piece. The breathable spacer is arranged around the electroacoustic transducer and is used to isolate the sound-absorbing particles and the electroacoustic transducer.

2. The speaker module according to claim 1, wherein: The second shell is provided with a first mounting groove, the opening of the first mounting groove is located on the lower surface of the second shell, the first mounting groove is arranged around the avoidance hole and passes through the hole wall of the avoidance hole, the lower pole piece is provided with a second mounting groove, the opening of the second mounting groove is located on the lower surface of the lower pole piece, the second mounting groove is arranged around the edge of the lower pole piece and passes through the peripheral side surface of the lower pole piece, and the fixing ring is installed in the first mounting groove and the second mounting groove.

3. The speaker module according to claim 2, wherein: The lower surface of the fixing ring is flush with the lower surface of the second shell, or the lower surface of the fixing ring is located on the upper side of the lower surface of the second shell.

4. The speaker module according to claim 2 or 3, characterized in that: The lower surface of the fixing ring is flush with the lower surface of the lower pole piece, or the lower surface of the fixing ring is located on the upper side of the lower surface of the lower pole piece.

5. The loudspeaker module according to any one of claims 2 to 4, characterized in that: The bottom wall of the first mounting groove and the bottom wall of the second mounting groove are both flat, and the speaker module also includes an adhesive layer, part of the adhesive layer is bonded between the upper surface of the fixing ring and the bottom wall of the first mounting groove, and part of the adhesive layer is bonded between the upper surface of the fixing ring and the bottom wall of the second mounting groove.

6. The loudspeaker module according to any one of claims 2 to 5, characterized in that: The second shell includes a shell body and a reinforcement. The shell body is provided with a mounting through hole. The mounting through hole passes through the shell body along the thickness direction of the shell body. The reinforcement is fixedly connected to the upper surface of the shell body and is arranged around the mounting through hole. Part of the reinforcement extends relative to the hole wall of the mounting through hole and encloses the hole wall of the mounting through hole to form the first mounting groove.

7. The speaker module according to claim 6, wherein: The shell body is made of plastic, the reinforcement is made of metal, and the shell body and the reinforcement are integrally formed.

8. The loudspeaker module according to any one of claims 1 to 7, characterized in that: The fixing ring is integrally formed with the second shell.

9. The loudspeaker module according to any one of claims 1 to 8, characterized in that: The electroacoustic transducer also includes a basin frame, which includes a frame located between the lower pole piece and the sound membrane. The breathable spacer is located on the lower side of the frame and is spaced apart from the frame. The size of the gap between the breathable spacer and the frame is smaller than the particle size of the sound-absorbing particles.

10. The speaker module according to claim 9, wherein: The second shell is provided with a plurality of first positioning columns, which are all provided on the upper surface of the second shell and are spaced apart around the avoidance hole. The plurality of first positioning columns are all located on the outside of the breathable isolation component and are spaced apart from the breathable isolation component.

11. The speaker module according to claim 10, wherein: The electroacoustic transducer is provided with a plurality of second positioning posts, which are located at the edge of the electroacoustic transducer and spaced apart from each other. The plurality of second positioning posts are all located on the inner side of the breathable isolation member and spaced apart from the breathable isolation member.

12. The speaker module according to claim 11, wherein: The size of the gap between the second positioning column and the first positioning column is smaller than the particle size of the sound-absorbing particles.

13. The loudspeaker module according to claim 11 or 12, characterized in that: A plurality of second positioning columns are fixedly connected to the lower surface of the frame.

14. The loudspeaker module according to any one of claims 9 to 13, characterized in that: The lower pole piece is provided with a plurality of clamping notches, the plurality of clamping notches penetrate the lower pole piece along the thickness direction of the lower pole piece and penetrate the peripheral side surface of the lower pole piece, and the plurality of clamping notches are spaced apart from each other; The basin stand further comprises a plurality of legs, the plurality of legs being fixedly connected to the lower surface of the frame and spaced apart from each other, and the plurality of legs being clamped one by one in the plurality of clamping notches; Wherein, the fixing ring is also installed on the plurality of supporting legs.

15. The loudspeaker module according to any one of claims 1 to 14, characterized in that: The electroacoustic transducer further includes two first side magnets, both of which are mounted on the upper surface of the lower pole piece and are spaced apart and arranged opposite to each other; The air-permeable spacer is provided with two avoidance gaps, both of which penetrate the air-permeable spacer along the thickness direction of the air-permeable spacer and penetrate the upper surface of the air-permeable spacer. The two avoidance gaps are spaced and opposite to each other. are configured to avoid the two first side magnets respectively.

16. The loudspeaker module according to any one of claims 1 to 15, characterized in that: The fixing ring is made of metal.

17. The loudspeaker module according to any one of claims 1 to 16, characterized in that: The breathable spacer is provided with a plurality of breathable holes, each of which penetrates the breathable spacer along the thickness direction of the breathable spacer, and the aperture of each of the breathable holes is smaller than the particle diameter of the sound-absorbing particles.

18. The speaker module according to claim 17, wherein: The breathable isolation member is a metal mesh, the breathable holes are mesh holes of the breathable isolation member, or the breathable isolation member is made of metal.

19. An electronic device, characterized in that: The invention comprises a housing and a speaker module according to any one of claims 1 to 18, wherein the speaker module is installed on the inner side of the housing.

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