Sound production module and electronic equipment

Abstract

The invention discloses a sound production module and electronic equipment, the sound production module comprises a module shell, a sound production single body and a retaining wall structure, and the side part of the module shell is provided with a sound outlet hole; the sound production monomer is arranged in the module shell and is matched with the module shell to form a front sound cavity communicated with the sound outlet hole; the retaining wall structure at least comprises a first shielding part and two second shielding parts, the first shielding part and the two second shielding parts enclose to form a sound cavity corresponding to the high pitch radiation area, and the sound cavity is provided with a sound passing hole which is different from the sound outlet hole in sound outlet direction; sound transmission channels corresponding to the low-pitch radiation area are formed between the two second shielding parts and the inner side face of the module shell, the two sound transmission channels are located on the two sides of the sound cavity respectively and communicate with the sound passing hole, and sound waves generated by the high-pitch unit pass through the sound cavity and the sound passing hole, then are transmitted through the two sound transmission channels and then are transmitted out through the sound outlet hole. According to the invention, the high pitch is effectively expanded to the ultrasonic frequency band while the performance of the audible sound frequency band is not reduced, the performance of the ultrasonic frequency band is improved, and the high-frequency performance is improved.

Description

Technical Field

[0001] The present invention relates to the field of electroacoustic technology, and in particular to a sound module and electronic equipment. Background Art

[0002] In smart terminals, such as smartphones, the distance sensor will function during a call. When the face approaches the screen, the screen will turn off, thus preventing misoperation. Commonly used distance sensors include optical displacement sensors and ultrasonic displacement sensors. The performance of various components in smart devices, such as camera modules, speaker modules, distance sensors, and batteries, is mostly positively correlated with the device size. If the distance sensor function is implemented within the speaker module, the total size of the device can be effectively reduced, saving internal space in the smart terminal and improving the internal space utilization of the smart terminal. However, the treble of existing speaker modules cannot be extended to the ultrasonic frequency band, that is, it cannot be extended to the frequency band greater than 20KHz, making it impossible to implement the ultrasonic ranging function within the speaker module.

[0003] In addition, the sound waves generated by the tweeter in the current speaker module have phase differences when propagating along different paths. When the phase difference reaches 180 degrees or an integer multiple of 180 degrees, interference cancellation occurs, and an interference valley appears in the frequency response curve, affecting the high-frequency performance. Summary of the Invention

[0004] The main purpose of the present invention is to propose a sound module and electronic equipment, aiming to solve the technical problems in the prior art that high frequencies cannot be extended to the ultrasonic frequency band within the speaker module and that the high-frequency performance is affected.

[0005] To achieve the above objectives, the present invention provides a sound module, comprising:

[0006] A module housing, wherein a sound outlet is provided on a side of the module housing;

[0007] A sound-emitting unit, wherein the sound-emitting unit is disposed in the module shell, and the sound-emitting unit cooperates with the module shell to form a front sound cavity connected to the sound outlet, the sound-emitting unit includes a magnetic circuit system, a tweeter unit and a woofer unit, and a treble radiation area corresponding to the tweeter unit and a bass radiation area corresponding to the woofer unit are provided on a side of the sound-emitting unit facing the front sound cavity, and the bass radiation area surrounds the outside of the treble radiation area;

[0008] A retaining wall structure is arranged in the front sound cavity, and the retaining wall structure at least includes a first shielding portion located on the side of the treble radiation area close to the sound outlet and two second shielding portions arranged on opposite sides of the first shielding portion. The first shielding portion and the two second shielding portions together form a sound cavity corresponding to the treble radiation area, and the sound cavity is provided with a sound hole that is different from the sound outlet direction of the sound outlet. The two second shielding portions form a sound transmission channel corresponding to the bass radiation area between the inner side surface of the module shell, and the two sound transmission channels are respectively located on both sides of the sound cavity and are connected to the sound hole. The sound waves generated by the tweeter pass through the sound cavity and the sound hole, propagate through the two sound transmission channels, and then are transmitted through the sound outlet.

[0009] Optionally, the extension direction of the first shielding portion is set at an angle to the direction of sound waves propagating from the sound transmission channel to the sound outlet hole, and both ends of the first shielding portion along its extension direction are connecting ends, one end of the two second shielding portions are respectively connected to the two connecting ends one by one, and the other ends of the two second shielding portions form the sound outlet hole.

[0010] Optionally, the two second shielding portions are respectively extended from the two connecting ends in a direction away from the sound outlet, so that the sound hole is opposite to and arranged opposite to the sound outlet;

[0011] Alternatively, one of the second shielding portions extends from the corresponding connecting end in a direction away from the sound outlet, and the other second shielding portion extends from the corresponding connecting end in a direction away from the sound outlet and then bends to extend toward the other connecting end, so that the sound holes are distributed on the side of the sound outlet.

[0012] Optionally, the outer edge of the tweeter is an annular closed structure, and the first shielding portion and the two second shielding portions form an annular non-closed structure that matches the shape of the outer edge of the tweeter.

[0013] Optionally, the outer edge of the tweeter unit is a square closed structure, and the first shielding portion and the two second shielding portions form a square non-closed structure.

[0014] Optionally, the outer edge of the tweeter includes two first connecting edges and two second connecting edges connected between the two first connecting edges, wherein the two first connecting edges are arranged corresponding to the sound outlet, the first shielding portion is arranged on the first connecting edge close to the sound outlet, and the two second shielding portions are respectively arranged on the two second connecting edges;

[0015] An extension length of the second connecting edge is L2, and an extension length of the second shielding portion is a2, wherein 0.1≤a2 / L2≤1; and / or, the extension lengths of the two second shielding portions are the same or different.

[0016] Optionally, the outer edge of the tweeter includes two first connecting edges and two second connecting edges connected between the two first connecting edges, wherein the two first connecting edges are provided corresponding to the sound outlet, and the first shielding portion is provided on the first connecting edge on a side close to the sound outlet; one of the second shielding portions is provided on a second connecting edge on the same side, and the other second shielding portion includes a first shielding segment and a second shielding segment, the second shielding segment is provided on the other second connecting edge and connected to the first shielding segment, and the first shielding segment is provided on the other first connecting edge and connected to an end of the second shielding segment away from the first shielding segment;

[0017] The extension length of the first connecting edge is L1, the extension length of the second connecting edge is L2, the extension length of the first blocking segment is b1, and the extension length of the second blocking segment is b2, wherein 0.1≤b1 / L1≤1.2, and b2=L2.

[0018] Optionally, the first shielding portion and the second shielding portion are both in contact with the tweeter unit and an inner side surface of the module housing corresponding to the tweeter unit.

[0019] Optionally, the retaining wall structure is a metal part or a plastic part; and / or the retaining wall structure is integrally formed with the module housing;

[0020] Alternatively, the retaining wall structure is made of sound-absorbing cotton.

[0021] Optionally, the tweeter and the woofer are coaxially arranged.

[0022] Optionally, the tweeter unit includes a tweeter diaphragm assembly and a piezoelectric ceramic piece, the tweeter diaphragm assembly includes a tweeter diaphragm and a tweeter reinforcement part connected to one side of the tweeter diaphragm, the retaining wall structure is connected to the outer edge of the tweeter diaphragm facing the side of the front sound cavity and surrounds the outside of the tweeter reinforcement part, and the piezoelectric ceramic piece is affixed to the tweeter reinforcement part.

[0023] Optionally, the tweeter unit includes a tweeter diaphragm assembly and a tweeter voice coil, the tweeter diaphragm assembly includes a tweeter diaphragm and a tweeter reinforcement portion connected to one side of the tweeter diaphragm, and the retaining wall structure is connected to an outer edge of the tweeter diaphragm facing the front acoustic cavity and surrounds the tweeter reinforcement portion.

[0024] The tweeter voice coil is a planar voice coil connected in parallel to the side of the tweeter reinforcement part facing away from the front sound cavity. The magnetic circuit system forms a first magnetic gap. Along the vibration direction of the tweeter voice coil, the planar voice coil is arranged opposite to the first magnetic gap and is located on the side of the first magnetic gap facing the tweeter diaphragm assembly.

[0025] Optionally, the magnetic circuit system is formed with a first magnetic gap;

[0026] The tweeter unit includes a tweeter diaphragm assembly and a tweeter voice coil, the tweeter diaphragm assembly includes a tweeter diaphragm and a tweeter reinforcement portion connected to one side of the tweeter diaphragm, the retaining wall structure is connected to the outer edge of the tweeter diaphragm facing the front sound cavity and surrounds the tweeter reinforcement portion;

[0027] One end of the tweeter voice coil is connected to the tweeter diaphragm assembly, and the other end of the tweeter voice coil extends in a direction away from the front sound cavity and is inserted into the first magnetic gap.

[0028] Optionally, the magnetic circuit system is formed with a first magnetic gap;

[0029] The tweeter unit includes a tweeter diaphragm assembly and a tweeter voice coil, the tweeter diaphragm assembly includes a tweeter diaphragm and a tweeter reinforcement portion connected to the inner edge of the tweeter diaphragm, the retaining wall structure is connected to the outer edge of the tweeter diaphragm facing the front sound cavity and surrounds the tweeter reinforcement portion;

[0030] The tweeter voice coil is a flat voice coil extending in a direction away from the front sound cavity, and the tweeter voice coil includes two strip edges spaced apart along the vibration direction of the tweeter voice coil, one of the strip edges is connected to the tweeter diaphragm assembly and is at least partially exposed outside the first magnetic gap, and the other strip edge is inserted in the first magnetic gap.

[0031] Optionally, the vibration direction of the tweeter coil is a first direction, each of the strip edges extends along a second direction, the number of the tweeter coils is multiple, and the multiple tweeter coils are spaced apart along a third direction, the first direction, the second direction and the third direction are perpendicular to each other, and the magnetic circuit system forms the first magnetic gap that is consistent with and one-to-one corresponding to the number of the tweeter coils.

[0032] Optionally, the magnetic circuit system is formed with a second magnetic gap;

[0033] The woofer unit includes a woofer diaphragm assembly and a woofer voice coil. The woofer diaphragm assembly includes a woofer reinforcement portion, an inner woofer surround, and an outer woofer surround surrounding the inner woofer surround. Two ends of the woofer reinforcement portion are respectively connected to the outer edge of the inner woofer surround and the inner edge of the outer woofer surround.

[0034] One end of the bass voice coil is connected to the bass diaphragm assembly, and the other end of the bass voice coil extends in a direction away from the front sound cavity and is inserted into the second magnetic gap.

[0035] The present invention further provides an electronic device, comprising a housing and the above-mentioned sound module housed in the housing.

[0036] The sound module of the present invention, on the basis of realizing the treble function and the bass function, also includes a retaining wall structure, which is arranged in the front sound cavity, and the retaining wall structure includes a first shielding portion and two second shielding portions, wherein the first shielding portion is located on the side of the treble radiation area close to the sound outlet, and the two second shielding portions are respectively arranged on opposite sides of the first shielding portion, and the first shielding portion and the two second shielding portions together form a sound cavity, which is arranged corresponding to the treble radiation area, and the sound cavity is provided with a sound hole, and the sound hole and the sound outlet have different sound emission directions, that is, the sound hole and the sound outlet are distributed on different sides. The two second shielding portions form a sound transmission channel connected to the sound hole between the inner side surface of the module shell, and the sound transmission channel is arranged corresponding to the bass radiation area, and the two sound transmission channels are respectively located on both sides of the sound cavity. With this arrangement, a sound cavity is constructed with the sound hole and the sound outlet on different sides through the retaining wall structure, and two sound transmission channels are constructed on either side of the sound cavity. This blocks the sound waves generated by the tweeter by the retaining wall structure and prevents them from propagating directly to the sound outlet. Instead, the sound waves propagate through the sound cavity and the sound hole, then through the two sound transmission channels and out through the sound outlet. This ensures that the performance of the audible sound band is not reduced while effectively extending the treble to the ultrasonic frequency band, that is, to a frequency band greater than 20KHz, effectively improving the performance of the ultrasonic frequency band and thus realizing the ultrasonic ranging function within the sound module. In addition, the retaining wall structure can adjust the direction and size of the sound output of the tweeter, thereby adjusting the airflow direction of the sound waves generated by the tweeter in the front sound cavity, avoiding the phase change of the sound waves along different propagation paths close to 180 degrees or an integer multiple of 180 degrees, thereby improving the high-frequency interference valley and improving the high-frequency performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0038] Figure 1 This is a schematic diagram of the assembly of a sound module according to an embodiment of the present invention;

[0039] Figure 2This is an exploded schematic diagram of a sound module according to an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of an exploded view of a sound unit in a sound module according to an embodiment of the present invention;

[0041] Figure 4 A cross-sectional schematic diagram of a sound module according to an embodiment of the present invention;

[0042] Figure 5 A schematic diagram of the flow of sound waves generated by a tweeter according to an embodiment of the present invention;

[0043] Figure 6 A schematic plan view of a tweeter unit in a sound module according to an embodiment of the present invention;

[0044] Figure 7 This is a structural comparison diagram of six retaining wall structures of different shapes according to the present invention;

[0045] Figure 8 Schematic cross-sectional view of a sound-emitting unit according to an embodiment of the present invention;

[0046] Figure 9 is a schematic cross-sectional view of a sound-emitting unit according to another embodiment of the present invention;

[0047] Figure 10 Schematic cross-sectional view of a sound-emitting unit according to another embodiment of the present invention;

[0048] Figure 11 Schematic cross-sectional view of a sound-emitting unit according to another embodiment of the present invention;

[0049] Figure 12 A schematic diagram of magnetization of a magnetic circuit structure having a second magnetic conductive plate according to an embodiment of the present invention;

[0050] Figure 13 A schematic diagram of magnetization of a magnetic circuit structure without a second magnetic conductive plate according to an embodiment of the present invention;

[0051] Figure 14 This is a magnetization diagram of an embodiment of the present invention in which there are two flat voice coils and the magnetic circuit structure has a second magnetic conductive plate.

[0052] Description of Figure Numbers:

[0053]

[0054]

[0055] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0057] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0058] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] like Figures 1 to 7As shown, the present invention proposes a sound module 100, which includes a module shell 10, a sound unit 20 and a retaining wall structure 30, wherein a sound hole 11 is opened on the side of the module shell 10, specifically, a sound hole 11 is opened on the front side of the module shell 10; the sound unit 20 is arranged in the module shell 10, and the sound unit 20 cooperates with the module shell 10 to form a front sound cavity 12 connected to the sound hole 11, the sound unit 20 includes a magnetic circuit system 21, a tweeter 22 and a woofer 23, and a treble radiation area 24 corresponding to the tweeter 22 and a woofer 23 are provided on the side of the sound unit 20 facing the front sound cavity 12, and the bass radiation area 25 corresponding to the woofer 23, and the bass radiation area 25 surrounds the treble radiation area 24; the retaining wall structure 30 is arranged In the front sound cavity 12, the retaining wall structure 30 includes at least a first shielding portion 31 located on the side of the tweeter radiation area 24 close to the sound outlet 11 and two second shielding portions 32 arranged on the opposite sides of the first shielding portion 31. The first shielding portion 31 and the two second shielding portions 32 together form a sound cavity 33 corresponding to the tweeter radiation area 24. The sound cavity 33 is provided with a sound hole 34 with a sound emitting direction different from that of the sound outlet 11. The two second shielding portions 32 form a sound transmission channel 35 corresponding to the bass radiation area 25 between the two second shielding portions 32 and the inner side surface of the module shell 10. The two sound transmission channels 35 are respectively located on both sides of the sound cavity 33 and are connected to the sound hole 34. The sound waves generated by the tweeter unit 22 pass through the sound cavity 33 and the sound hole 34, propagate through the two sound transmission channels 35, and then are transmitted through the sound outlet 11.

[0060] The sound module 100 of the present invention can be a speaker module, and the sound module 100 can be applied to smart terminals, such as smart phones, smart tablets and other electronic devices. This embodiment is described by taking the sound module 100 as a speaker module as an example.

[0061] Specifically, in the sound module 100 of the present invention, the sound unit 20 is disposed within the module shell 10 to accommodate the sound unit 20, and the sound unit 20 cooperates with the module shell 10 to form a front sound cavity 12, which is connected to the sound outlet 11 to achieve sound emission. In one embodiment, the module shell 10 includes a first shell 13 and a second shell 14, which are interlocked to form a mounting cavity 15, and the sound unit 20 is disposed within the mounting cavity 15. The sound outlet 11 can be opened on the first shell 13 and / or the second shell 14 according to actual needs. The front sound cavity 12 is located on the upper side of the sound unit 20, and the vibration directions of the tweeter 22 and the woofer 23 are both up and down or vertical, and the vertical direction is the height direction. On the side of the sound unit 20 facing the front sound cavity 12, that is, the upper side of the sound unit 20, there is a treble radiation area 24 and a bass radiation area 25 surrounding the treble radiation area 24, wherein the treble radiation area 24 corresponds to the tweeter unit 22 to realize the treble function, and the bass radiation area 25 corresponds to the woofer unit 23 to realize the bass function.

[0062] The sound module 100 of the present invention also includes a retaining wall structure 30, which is disposed within the front sound cavity 12. The retaining wall structure 30 includes a first shielding portion 31 and two second shielding portions 32. The first shielding portion 31 is located on the side of the high-frequency radiation area 24 near the sound outlet 11, and the two second shielding portions 32 are respectively disposed on opposite sides of the first shielding portion 31. The first shielding portion 31 and the two second shielding portions 32 together form a sound cavity 33, which is disposed corresponding to the high-frequency radiation area 24. The sound cavity 33 is provided with a sound hole 34. The sound hole 34 and the sound outlet 11 have different sound emission directions, that is, the sound hole 34 and the sound outlet 11 are located on different sides. The two second shielding portions 32 form a sound transmission channel 35 between the inner side surface of the module housing 10 and the sound transmission channel 35, which is connected to the sound hole 34. The sound transmission channel 35 is disposed corresponding to the low-frequency radiation area 25, and the two sound transmission channels 35 are respectively located on both sides of the sound cavity 33. In this way, a sound cavity 33 distributed on different sides of the sound hole 34 and the sound outlet 11 is constructed through the retaining wall structure 30, and two sound transmission channels 35 are constructed on both sides of the sound cavity 33, so that the sound waves generated by the tweeter 22 are blocked by the retaining wall structure 30, and the sound waves cannot be directly transmitted to the sound outlet 11, but pass through the sound cavity 33 and the sound hole 34 and then propagate through the two sound transmission channels 35 before being transmitted out through the sound outlet 11, ensuring that the performance of the audible sound frequency band is not reduced while the treble is effectively expanded to the ultrasonic frequency band, that is, expanded to a frequency band greater than 20KHz, effectively improving the ultrasonic frequency band performance, thereby realizing the ultrasonic ranging function in the sound module 100.

[0063] At the same time, the retaining wall structure 30 in the sound module 100 of the present invention can adjust the sound direction and size of the tweeter unit 22, thereby adjusting the airflow direction of the sound waves generated by the tweeter unit 22 in the front sound cavity 12, and avoiding the phase change of the sound waves along different propagation paths close to 180 degrees or an integer multiple of 180 degrees, thereby improving the high-frequency interference valley and enhancing the high-frequency performance.

[0064] It should be noted that Figure 5 The double-dotted line with an arrow in the middle indicates the direction of sound wave flow.

[0065] Furthermore, the extension direction of the first shielding portion 31 is set at an angle to the direction in which the sound wave propagates from the sound transmission channel 35 to the sound outlet 11. Both ends of the first shielding portion 31 along its extension direction are connecting ends, and one end of the two second shielding portions 32 is respectively connected to the two connecting ends one by one, and the other ends of the two second shielding portions 32 form a sound outlet 34.

[0066] For example, Figure 5As shown, the sound outlet 11 is located at the front, and the direction in which sound waves propagate from the sound transmission channel 35 to the sound outlet 11 is from back to front. The extension direction of the first shielding portion 31 is set at an angle to the front-to-back direction, specifically the left-right direction. This allows the first shielding portion 31 to block the sound outlet 11, preventing sound waves generated by the tweeter 22 from directly propagating to the sound outlet 11. To improve the shielding effect, the extension direction of the first shielding portion 31 can be the same as that of the sound outlet 11. If the sound outlet 11 extends in the left-right direction, the extension direction of the first shielding portion 31 is also the left-right direction. Both ends of the first shielding portion 31 along its extension direction are connecting ends. One end of each of the two second shielding portions 32 is connected to the two connecting ends in a one-to-one correspondence. The other ends of the two second shielding portions 32 form a sound hole 34, allowing sound waves within the acoustic cavity 33 to propagate through the sound hole 34 into the sound transmission channel 35. This structural design is reasonable.

[0067] In one embodiment, if Figure 7 As shown in Figures (A), (B), (C), and (D), the two second shielding portions 32 extend from the two connecting ends in a direction away from the sound outlet 11, so that the sound hole 34 is located opposite and opposite the sound outlet 11. Specifically, the two second shielding portions 32 extend from the two connecting ends in a direction away from the sound outlet 11, that is, toward the rear, so that the sound hole 34 formed by the other ends of the two second shielding portions 32 is located at the rear, opposite and opposite the sound outlet 11, preventing sound waves generated by the tweeter 22 from directly propagating to the sound outlet 11.

[0068] In another embodiment, if Figure 7 As shown in Figures (E) and (F), one of the second shielding portions 32 extends from the corresponding connection end in a direction away from the sound outlet 11, while the other second shielding portion 32 extends from the corresponding connection end in a direction away from the sound outlet 11 and then bends to extend toward the other connection end, so that the sound holes 34 are distributed to the sides of the sound outlet 11. Specifically, one of the second shielding portions 32 extends from the corresponding connection end in a direction away from the sound outlet 11, that is, toward the rear, while the other second shielding portion 32 extends from the corresponding connection end toward the rear and then bends to extend toward the other connection end, so that the sound holes 34 are distributed to the sides of the sound outlet 11, preventing sound waves generated by the tweeter 22 from directly propagating to the sound outlet 11.

[0069] In some embodiments of the present invention, the outer edge of the tweeter 22 in the sound module 100 is a ring-shaped closed structure, and the first shielding portion 31 and the two second shielding portions 32 form a ring-shaped non-closed structure that matches the shape of the outer edge of the tweeter 22, so that the outer edge of the tweeter 22 is surrounded by a retaining wall structure 30 to effectively and multi-directionally shield the sound waves generated by the tweeter 22.

[0070] In one embodiment, if Figures 5 to 7As shown, the outer edge of the tweeter unit 22 is a square closed structure, and the first shielding portion 31 and the two second shielding portions 32 form a square non-closed structure, so as to effectively improve the ultrasonic frequency band performance and high-frequency performance of the square speaker.

[0071] like Figure 6 and Figure 7 As shown in (A), (B), (C), and (D), in one embodiment, the outer edge of the tweeter 22 includes two first connecting edges 221 and two second connecting edges 222 connected between the two first connecting edges 221, wherein the two first connecting edges 221 are arranged corresponding to the sound outlet 11, and the first shielding portion 31 is arranged on the first connecting edge 221 close to the side of the sound outlet 11; the two second shielding portions 32 are respectively arranged on the two second connecting edges 222; the extension length of the second connecting edge 222 is L2, and the extension length of the second shielding portion 32 is a2, wherein 0.1≤a2 / L2≤1.

[0072] Specifically, the two first connecting edges 221 and the two second connecting edges 222 of the tweeter 22 form a square outer edge. The two first connecting edges 221 are arranged corresponding to the sound outlet 11 and both extend in the left-right direction and are arranged opposite each other in the front-to-back direction. The two second connecting edges 222 both extend in the front-to-back direction and are arranged opposite each other in the left-to-right direction. The first shielding portion 31 is arranged on the first connecting edge 221 on the side close to the sound outlet 11, that is, the first shielding portion 31 is arranged on the first connecting edge 221 located on the front side and matches the shape of the first connecting edge 221. The two second shielding portions 32 are respectively arranged on the two second connecting edges 222, and the second shielding portions 32 match the shape of the corresponding second connecting portions, so as to enclose a sound hole 34 arranged opposite and opposite to the sound outlet 11, resulting in a reasonable structural design.

[0073] It is understandable that the extension length of the first shielding portion 31 is consistent with the extension length of the corresponding first connecting edge 221. The extension length of the second connecting edge 222 is L2, and the extension length of the second shielding portion 32 is a2. In a preferred embodiment, 0.1≤a2 / L2≤1, that is, the ratio of the extension length of the second shielding portion 32 to the extension length of the second connecting edge 222 is 0.1-1. Optionally, a2 / L2 can be 0.3, 0.5, 0.8, 1, etc., thereby effectively shielding the sound waves in the sound cavity 33 and preventing the sound waves generated by the tweeter 22 from directly propagating to the sound outlet 11.

[0074] Furthermore, the extension lengths of the two second shielding portions 32 are the same or different, so that the retaining wall structure 30 can be flexibly configured according to actual usage requirements.

[0075] like Figure 6 and Figure 7As shown in (E) and (F), in another embodiment, the outer edge of the tweeter 22 includes two first connecting edges 221 and two second connecting edges 222 connected between the two first connecting edges 221, wherein the two first connecting edges 221 are arranged corresponding to the sound outlet 11, and the first shielding portion 31 is arranged on the first connecting edge 221 on the side close to the sound outlet 11; one of the second shielding portions 32 is arranged on a second connecting edge 222 on the same side, and the other second shielding portion 32 includes a first shielding segment 321 and a second shielding segment 322, the second blocking segment 322 is arranged on the other second connecting edge 222 and is connected to the first blocking portion 31, and the first blocking segment 321 is arranged on the other first connecting edge 221 and is connected to the end of the second blocking segment 322 away from the first blocking portion 31; the extension length of the first connecting edge 221 is L1, the extension length of the second connecting edge 222 is L2, the extension length of the first blocking segment 321 is b1, and the extension length of the second blocking segment 322 is b2, wherein 0.1≤b1 / L1≤1.2, b2=L2.

[0076] Specifically, the two first connecting edges 221 and the two second connecting edges 222 of the tweeter 22 form a square outer edge. The two first connecting edges 221 are arranged corresponding to the sound holes 11 and both extend in the left-right direction and are arranged opposite to each other in the front-to-back direction. The two second connecting edges 222 both extend in the front-to-back direction and are arranged opposite to each other in the left-to-right direction. The first shielding portion 31 is arranged on the first connecting edge 221 close to the side of the sound outlet 11, that is, the first shielding portion 31 is arranged on the first connecting edge 221 located on the front side and matches the shape of the first connecting edge 221, one of the second shielding portions 32 is arranged on a second connecting edge 222 on the same side, and the other second shielding portion 32 includes a first shielding segment 321 and a second shielding segment 322, wherein the second shielding segment 322 is arranged on the other second connecting edge 222 and connected to the first shielding portion 31, and the first shielding segment 321 is arranged on the first connecting edge 221 on the rear side and connected to the end of the second shielding segment 322 away from the first shielding portion 31, so that the sound hole 34 is distributed on the side of the sound outlet 11, and the structural design is reasonable. The extension length of the first connecting edge 221 is L1, the extension length of the second connecting edge 222 is L2, the extension length of the first blocking segment 321 is b1, and the extension length of the second blocking segment 322 is b2. In a preferred embodiment, 0.1≤b1 / L1≤1.2, b2=L2, that is, the ratio of the extension length of the first blocking segment 321 to the extension length of the first connecting edge 221 is 0.1~1.2. Optionally, b1 / L1 can be 0.1, 0.3, 0.5, 0.7, 0.9, 1.1 and 1.2, etc., and the extension length of the second blocking segment 322 is the same as the extension length of the second connecting edge 222, and the structural design is reasonable.

[0077] In other embodiments, the outer edge of the tweeter 22 is a circular closed structure, and the first shielding portion 31 and the two second shielding portions 32 form a circular non-closed structure to effectively improve the ultrasonic frequency band performance and high-frequency performance of the circular speaker.

[0078] In the retaining wall structure 30 of the sound module 100 of the present invention, the first shielding portion 31 and the second shielding portion 32 both abut between the tweeter 22 and the inner side surface of the module housing 10 corresponding to the tweeter 22. Specifically, the bottom of the first shielding portion 31 and the bottom of the second shielding portion 32 both abut against the outer edge of the tweeter 22, and the top of the first shielding portion 31 and the top of the second shielding portion 32 both abut against the inner side surface of the module housing 10 corresponding to the tweeter 22. This creates a seamless abutment between the retaining wall structure 30 and the tweeter 22 and the inner side surface of the module housing 10 in the height direction, ensuring that sound waves within the sound cavity 33 will not leak due to gaps, thereby ensuring that the treble is effectively extended to the ultrasonic frequency band and improving high-frequency performance.

[0079] In one embodiment, the retaining wall structure 30 is made of metal or plastic, which facilitates material acquisition and fabrication. When the retaining wall structure 30 is made of metal or plastic, in an optional embodiment, the retaining wall structure 30 and the module housing 10 are integrally formed, eliminating assembly gaps, eliminating assembly errors, and facilitating fabrication.

[0080] In another embodiment, the retaining wall structure 30 is made of sound-absorbing cotton, which is environmentally friendly and durable, and easy to process. The high acoustic impedance of the sound-absorbing cotton can reduce high-frequency response jitter, and the product has better sound quality.

[0081] In the sound module 100 of the present invention, the tweeter 22 and the woofer 23 are coaxially arranged, which is not only convenient for manufacturing but also does not occupy additional height, thereby facilitating a thin design of the sound module 100 .

[0082] like Figure 8 As shown, in one embodiment, the tweeter unit 22 includes a tweeter diaphragm assembly 223 and a piezoelectric ceramic piece 224. The tweeter diaphragm assembly 223 includes a tweeter diaphragm 2231 and a tweeter reinforcement part 2232 connected to one side of the tweeter diaphragm 2231. The retaining wall structure 30 is connected to the side of the outer edge of the tweeter diaphragm 2231 facing the front sound cavity 12 and surrounds the outside of the tweeter reinforcement part 2232. That is, the retaining wall structure 30 is connected to the upward side of the outer edge of the tweeter diaphragm 2231 and surrounds the outside of the tweeter reinforcement part 2232. The piezoelectric ceramic piece 224 is attached to the tweeter reinforcement part 2232 and vibrates up and down together with the tweeter diaphragm assembly 223 to achieve vibration sound.

[0083] like Figure 9As shown, in another embodiment, the tweeter unit 22 includes a tweeter diaphragm assembly 223 and a tweeter voice coil 225, the tweeter diaphragm assembly 223 includes a tweeter diaphragm 2231 and a tweeter reinforcement part 2232 connected to one side of the tweeter diaphragm 2231, the retaining wall structure 30 is connected to the side of the outer edge of the tweeter diaphragm 2231 facing the front sound cavity 12 and surrounds the outside of the tweeter reinforcement part 2232, that is, the retaining wall structure 30 is connected to the upward side of the outer edge of the tweeter diaphragm 2231 and surrounds the outside of the tweeter reinforcement part 2232; the tweeter voice coil 225 is a planar voice coil connected in parallel to the side of the tweeter reinforcement part 2232 away from the front sound cavity 12, the magnetic circuit system 21 forms a first magnetic gap 211, along the vibration direction of the tweeter voice coil 225, the planar voice coil is arranged opposite to the first magnetic gap 211 and is located on the side of the first magnetic gap 211 facing the tweeter diaphragm assembly 223. Specifically, the planar voice coil is connected in parallel to the lower side of the tweeter reinforcement part 2232 and is relatively arranged on the upper side of the first magnetic gap 211 to cut the magnetic flux lines to achieve up and down vibration, thereby driving the tweeter diaphragm assembly 223 to vibrate up and down together to achieve vibration sound.

[0084] like Figure 10 As shown, in another embodiment, the magnetic circuit system 21 is formed with a first magnetic gap 211; the tweeter unit 22 includes a tweeter diaphragm assembly 223 and a tweeter voice coil 225, the tweeter diaphragm assembly 223 includes a tweeter diaphragm 2231 and a tweeter reinforcement portion 2232 connected to one side of the tweeter diaphragm 2231, the retaining wall structure 30 is connected to the outer edge of the tweeter diaphragm 2231 facing the side of the front sound cavity 12 and surrounds the outside of the tweeter reinforcement portion 2232, that is, the retaining wall structure 30 is connected to the outside of the tweeter diaphragm 2231 The edge of the tweeter 225 faces upward and surrounds the outside of the tweeter reinforcement part 2232; one end of the tweeter voice coil 225 is connected to the tweeter diaphragm assembly 223, and the other end of the tweeter voice coil 225 extends in the direction away from the front sound cavity 12 and is inserted in the first magnetic gap 211. Specifically, the upper end of the tweeter voice coil 225 is connected to the tweeter diaphragm assembly 223, and the lower end extends downward and is inserted in the first magnetic gap 211, so as to cut the magnetic lines of force to achieve up and down vibration, thereby driving the tweeter diaphragm assembly 223 to vibrate up and down together to achieve vibration sound.

[0085] like Figure 11As shown, in another embodiment, the magnetic circuit system 21 is formed with a first magnetic gap 211; the tweeter unit 22 includes a tweeter diaphragm assembly 223 and a tweeter voice coil 225, the tweeter diaphragm assembly 223 includes a tweeter diaphragm 2231 and a tweeter reinforcement portion 2232 connected to the inner edge of the tweeter diaphragm 2231, the retaining wall structure 30 is connected to the outer edge of the tweeter diaphragm 2231 toward the side of the front sound cavity 12 and surrounds the outside of the tweeter reinforcement portion 2232, that is, the retaining wall structure 30 is connected to the tweeter diaphragm 2231. The outer edge of the sound diaphragm 2231 faces upward and surrounds the outside of the tweeter reinforcement part 2232; the tweeter voice coil 225 is a flat voice coil 225a extending in a direction away from the front sound cavity 12, and the tweeter voice coil 225 includes two strip edges 2251 spaced apart along the vibration direction of the tweeter voice coil 225, one of the strip edges 2251 is connected to the tweeter diaphragm assembly 223 and is at least partially exposed outside the first magnetic gap 211, and the other strip edge 2251 is inserted in the first magnetic gap 211.

[0086] Specifically, in this embodiment, the tweeter voice coil 225 is a flat voice coil 225a. The tweeter voice coil 225 includes two strips 2251 spaced apart along its vibration direction, i.e., along the up-down direction. One of the strips 2251 located at the top is connected to the tweeter diaphragm assembly 223, and this strip 2251 is at least partially exposed outside the first magnetic gap 211, supporting the tweeter diaphragm assembly 223. The strip 2251 located at the bottom is inserted into the first magnetic gap 211 to cut the magnetic flux lines to achieve up-and-down vibration, thereby driving the tweeter diaphragm assembly 223 to vibrate up and down together, achieving vibration and sound generation. It should be noted that the connection method between the flat voice coil 225a and the tweeter diaphragm assembly 223 is not limited to this. For example, the flat voice coil 225a can also be connected to the tweeter diaphragm assembly 223 via a skeleton.

[0087] Furthermore, the vibration direction of the tweeter coil 225 is the first direction, each edge 2251 extends along the second direction, the number of the tweeter coils 225 is multiple, and the multiple tweeter coils 225 are spaced apart along the third direction. The first direction, the second direction and the third direction are perpendicular to each other, and the magnetic circuit system 21 forms a first magnetic gap 211 that is consistent with the number of tweeter coils 225 and corresponds one to one.

[0088] For example, the first direction is Figure 2 The up and down directions shown are Figure 2 The front and rear directions shown are Figure 2 As shown in the left and right directions. Figure 14As shown, there are multiple tweeter voice coils 225, spaced apart in the left-right direction. The magnetic circuit system 21 forms a first magnetic gap 211 that corresponds to the number of tweeter voice coils 225. This allows the multiple tweeter voice coils 225 to simultaneously drive the tweeter diaphragm assembly 223 to vibrate vertically, thereby increasing the driving force on the tweeter diaphragm assembly 223. In one embodiment, there are two tweeter voice coils 225. These two tweeter voice coils 225 can improve the driving force of the tweeter diaphragm assembly 223 while simplifying the structure and facilitating design and fabrication.

[0089] like Figures 8 to 14 As shown, the magnetic circuit system 21 of the sound module 100 of the present invention forms a second magnetic gap 212; the bass unit 23 includes a bass diaphragm assembly 231 and a bass voice coil 232, the bass diaphragm assembly 231 includes a bass reinforcement part 2311, an inner bass fold ring 2312 and an outer bass fold ring 2313 surrounding the inner bass fold ring 2312, the two ends of the bass reinforcement part 2311 are respectively connected to the outer edge of the inner bass fold ring 2312 and the inner edge of the outer bass fold ring 2313; one end of the bass voice coil 232 is connected to the bass diaphragm assembly 231, and the other end of the bass voice coil 232 extends in a direction away from the front sound cavity 12 and is inserted into the second magnetic gap 212.

[0090] Specifically, the upper end of the bass voice coil 232 is connected to the connection between the inner bass fold ring 2312 and the bass reinforcement part 2311, and the lower end of the bass voice coil 232 extends downward and is inserted into the second magnetic gap 212 so as to cut the magnetic flux lines to achieve up and down vibration, thereby driving the bass diaphragm assembly 231 to vibrate up and down together to achieve vibration sound.

[0091] Understandably, if Figure 3 As shown, the sound unit 20 also includes a centering support 26, a support shell 27, and a PCB. The centering support 26 is connected between the woofer voice coil 232 and the support shell 27 to prevent polarization. The inner edge of the outer woofer surround 2313 can be connected to the support shell 27 to achieve assembly of the woofer diaphragm assembly 231 and the support shell 27. The PCB is used to conduct electricity between the centering support 26 and external devices.

[0092] The magnetic circuit system 21 in the sound module 100 of the present invention includes a magnetic yoke 213 and a magnetic circuit structure. The magnetic circuit structure includes at least a first magnet assembly, a magnetic assembly, and a second magnet assembly stacked in sequence along the vibration direction of the tweeter voice coil 225 / woofer voice coil 232. The first magnet assembly is arranged on the magnetic yoke 213.

[0093] As can be understood, the tweeter voice coil 225 and the woofer voice coil 232 both vibrate in the vertical direction. The magnetic circuit structure includes a first magnet assembly, a magnetic conductive assembly, and a second magnet assembly stacked in sequence in the vertical direction, with the first magnet assembly located at the bottom and disposed on the magnetic conductive yoke 213. The provision of the first magnet assembly, the magnetic conductive assembly, and the second magnet assembly increases the driving force of the tweeter voice coil 225 in driving the tweeter diaphragm assembly 223 to vibrate vertically, and increases the driving force of the woofer voice coil 232 in driving the woofer diaphragm assembly 231 to vibrate vertically.

[0094] Specifically, the first magnet assembly includes a first magnet 214 and a side magnet 215 surrounding the first magnet 214. The magnetic conductive assembly includes a first magnetic conductive plate 216 disposed on the first magnet 214 and a side magnetic conductive plate 217 disposed on the side magnet 215. The second magnet assembly includes a second magnet 218 disposed on the first magnetic conductive plate 216. A first magnetic gap 211 is formed within the first magnet 214, the first magnetic conductive plate 216, and the second magnet 218. A second magnetic gap 212 is formed between the first magnet 214 and the side magnet 215, and between the first magnetic conductive plate 216 and the side magnetic conductive plate 217. This arrangement ensures that the magnetic circuit structure forms the first magnetic gap 211 and the second magnetic gap 212, respectively allowing the tweeter voice coil 225 and the woofer voice coil 232 to be inserted and suspended, thereby achieving coordination between the magnetic circuit structure and the tweeter unit 22 and the woofer unit 23, thereby improving the acoustic performance of the sound module 100.

[0095] Such as Figure 12 and Figure 13 As shown, in one embodiment, the second magnet 218 includes a first magnetic block 2181, a second magnetic block 2182, and a third magnetic block 2183 magnetized along the vibration direction of the tweeter voice coil 225 / the woofer voice coil 232; when there is only one tweeter voice coil 225, along the axial direction of the tweeter voice coil 225, the second magnetic block 2182 and the third magnetic block 2183 are located on one side of the tweeter voice coil 225, the first magnetic block 2181 is located on the other side of the tweeter voice coil 225, and the third magnetic block 2183 is located on the second magnetic block 2182 away from the first magnetic block 2183. 1; the magnetization direction of the first magnetic block 2181 is opposite to that of the second magnetic block 2182 and is the same as that of the third magnetic block 2183; the first magnet 214 includes a fourth magnetic block 2141 and a fifth magnetic block 2142 which are magnetized along the vibration direction of the tweeter voice coil 225 / woofer voice coil 232 and have the same magnetization direction; along the axial direction of the tweeter voice coil 225, the fourth magnetic block 2141 and the fifth magnetic block 2142 are respectively located on both sides of the tweeter voice coil 225, and the magnetization directions of the first magnetic block 2181 and the fourth magnetic block 2141 are opposite.

[0096] It can be understood that the vibration directions of the tweeter voice coil 225 and the bass voice coil 232 are both up and down, and the axial direction of the tweeter voice coil 225 is left and right. Figure 12 and Figure 13 As shown, the second magnet 2182 and the third magnet 2183 of the second magnet 218 are located on the right side of the tweeter voice coil 225, the first magnet 2181 is located on the left side of the tweeter voice coil 225, and the third magnet 2183 is located on the side of the second magnet 2182 away from the first magnet 2181, that is, the third magnet 2183 is located on the right side of the second magnet 2182. The first magnet 2181 and the third magnet 2183 are both magnetized downward, while the second magnet 2182 is magnetized upward. The fourth magnet 2141 and the fifth magnet 2142 of the first magnet 214 are respectively located on the left and right sides of the tweeter voice coil 225. The fourth magnet 2141 is located corresponding to the first magnet 2181 and has opposite magnetization directions, with the fourth magnet 2141 magnetized upward. The fifth magnet 2142 has the same magnetization direction as the fourth magnet 2141 and has an upward magnetization direction.

[0097] The magnetization direction of the side magnet 215 is parallel to and opposite to that of the fourth magnetic block 2141. That is, the side magnet 215 is magnetized downward. The magnetic yoke 213, the first magnetic plate 216 and the side magnetic plate 217 can all guide magnetic lines of force to prevent magnetic leakage.

[0098] In one embodiment, the magnetic conductive assembly further includes a second magnetic conductive plate 219. The second magnetic conductive plate 219 is stacked on the side of the second magnet 218 facing away from the first magnetic conductive plate 216. Specifically, the second magnetic conductive plate 219 is stacked on the upper side of the second magnet 218. A first magnetic gap 211 is formed within the second magnetic conductive plate 219. Specifically, the first magnetic gap 211 sequentially passes through the second magnetic conductive plate 219, the second magnet 218, the first magnetic conductive plate 216, and the first magnet 214 from top to bottom. The second magnetic conductive plate 219 also guides magnetic flux lines to prevent magnetic leakage.

[0099] by Figure 13 Taking the magnetization direction as an example, the N poles of the first magnetic block 2181 and the third magnetic block 2183 are downward, and the N poles of the second magnetic block 2182, the fourth magnetic block 2141 and the fifth magnetic block 2142 are upward. Part of the magnetic force lines of the first magnetic block 2181 and the fourth magnetic block 2141 pass through the left part of the first magnetic conductive plate 216 through the lower side strip 2251 of the tweeter voice coil 225, pass through the right part of the first magnetic conductive plate 216 to the second magnetic block 2182, and then from the second magnetic block 2182, pass through the upper side strip 2251 of the tweeter voice coil 225 and return to the first magnetic block 2181 (as shown in FIG. Figure 12As shown, if a second magnetic conductive plate 219 is provided, the magnetic lines of force emitted from the second magnetic block 2182 pass through the right part of the second magnetic conductive plate 219, pass through the upper side strip 2251 of the tweeter voice coil 225, and then return to the first magnetic block 2181 through the left part of the second magnetic conductive plate 219, forming a magnetic circuit. The current directions of the upper side strip 2251 and the lower side strip 2251 of the tweeter voice coil 225 are opposite, so the force directions of the two strips 2251 are the same, the resultant force is the largest, and the driving force is large. Part of the magnetic flux of the fourth magnetic block 2141 and the first magnetic block 2181 passes through the left side of the first magnetic plate 216, through the woofer voice coil 232, then through the left side of the side magnetic plate 217 to the left side of the side magnet 215, and then returns to the fourth magnetic block 2141 via the magnetic yoke 213, thus forming a magnetic circuit. The magnetic flux of the third magnetic block 2183 and the fifth magnetic block 2142 passes through the right side of the first magnetic plate 216, through the woofer voice coil 232, then through the right side of the side magnetic plate 217 to the right side of the side magnet 215, and then returns to the fifth magnetic block 2142 via the magnetic yoke 213, thus forming a magnetic circuit. Because the second magnet 218 and the first magnet 214 are located on the upper and lower sides of the first magnetic plate 216, respectively, more and denser magnetic flux passes through the first magnetic plate 216 to reach the tweeter voice coil 225, resulting in a greater driving force. The provision of the side magnet 215 and the side magnetic plate 217 can enhance the magnetic field strength and improve the driving force.

[0100] like Figure 14As shown, in another embodiment, the second magnet 218 includes a first magnetic block 2181, a second magnetic block 2182 and a third magnetic block 2183 magnetized along the vibration direction of the tweeter voice coil 225 / the woofer voice coil 232; when there are two tweeter voice coils 225, along the axial direction of the tweeter voice coil 225, the first magnetic block 2181 is located on the left side of the tweeter voice coil 225 on the left, the second magnetic block 2182 is located between the two tweeter voice coils 225, and the third magnetic block 2183 is located on the right side of the tweeter voice coil 225 on the right; the magnetization direction of the first magnetic block 2181 is opposite to the magnetization direction of the second magnetic block 2182 and is opposite to the magnetization direction of the third magnetic block 2183 have the same magnetizing direction; the first magnet 214 includes a fourth magnetic block 2141 and a fifth magnetic block 2142 which are magnetized along the vibration direction of the tweeter voice coil 225 / woofer voice coil 232 and have the same magnetizing direction, and also includes a sixth magnetic block 2143 which is magnetized along the vibration direction of the tweeter voice coil 225 / woofer voice coil 232 and has an opposite magnetizing direction to the fourth magnetic block 2141; along the axial direction of the tweeter voice coil 225, the fourth magnetic block 2141 is located on the left side of the tweeter voice coil 225 on the left, the fifth magnetic block 2142 is located on the right side of the tweeter voice coil 225 on the right, and the sixth magnetic block 2143 is located between the two tweeter voice coils 225. The magnetizing directions of the first magnetic block 2181 and the fourth magnetic block 2141 are opposite. With this arrangement, the strip edges 2251 around the woofer voice coil 232 and around each tweeter voice coil 225 form a magnetic circuit, and the arrangement of the two tweeter voice coils 225 can increase the driving force. Specifically, the magnetizing direction is as follows: Figure 14 As shown, no further details are given here.

[0101] It should be noted that Figures 12 to 14 The dotted arrow indicates the magnetization direction.

[0102] The present invention further provides an electronic device comprising a housing and a sound module 100 as described above housed within the housing. The electronic device of the present invention may be a smart terminal, such as a smartphone, a smart tablet, or the like. The specific structure of the electronic device is similar to the above-described embodiments. Since the electronic device utilizes all the technical solutions of all the above-described embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above-described embodiments, and therefore will not be further elaborated here.

[0103] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, within the scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. A sound module, characterized in that: The sound module includes: A module housing, wherein a sound outlet is provided on a side of the module housing; A sound-emitting unit, wherein the sound-emitting unit is disposed in the module shell, and the sound-emitting unit cooperates with the module shell to form a front sound cavity connected to the sound outlet, the sound-emitting unit includes a magnetic circuit system, a tweeter unit and a woofer unit, and a treble radiation area corresponding to the tweeter unit and a bass radiation area corresponding to the woofer unit are provided on a side of the sound-emitting unit facing the front sound cavity, and the bass radiation area surrounds the outside of the treble radiation area; A retaining wall structure is arranged in the front sound cavity, and the retaining wall structure at least includes a first shielding portion located on the side of the treble radiation area close to the sound outlet and two second shielding portions arranged on opposite sides of the first shielding portion. The first shielding portion and the two second shielding portions together form a sound cavity corresponding to the treble radiation area, and the sound cavity is provided with a sound hole that is different from the sound outlet direction of the sound outlet. The two second shielding portions form a sound transmission channel corresponding to the bass radiation area between the inner side surface of the module shell, and the two sound transmission channels are respectively located on both sides of the sound cavity and are connected to the sound hole. The sound waves generated by the tweeter pass through the sound cavity and the sound hole, propagate through the two sound transmission channels, and then are transmitted through the sound outlet.

2. The sound module according to claim 1, wherein: The extension direction of the first shielding portion is set at an angle to the direction in which the sound wave propagates from the sound transmission channel to the sound outlet hole. Both ends of the first shielding portion along its extension direction are connecting ends, and one end of the two second shielding portions is respectively connected to the two connecting ends in a one-to-one correspondence, and the other ends of the two second shielding portions form the sound outlet hole.

3. The sound module according to claim 2, wherein: The two second shielding portions are respectively extended from the two connecting ends in a direction away from the sound outlet, so that the sound hole is opposite to and arranged opposite to the sound outlet; Alternatively, one of the second shielding portions extends from the corresponding connecting end in a direction away from the sound outlet, and the other second shielding portion extends from the corresponding connecting end in a direction away from the sound outlet and then bends to extend toward the other connecting end, so that the sound holes are distributed on the side of the sound outlet.

4. The sound module according to claim 1, wherein: The outer edge of the tweeter unit is in a ring-shaped closed structure, and the first shielding portion and the two second shielding portions form a ring-shaped non-closed structure that matches the shape of the outer edge of the tweeter unit.

5. The sound module according to claim 4, wherein: The outer edge of the tweeter unit is a square closed structure, and the first shielding portion and the two second shielding portions form a square non-closed structure.

6. The sound module according to claim 5, wherein: The outer edge of the tweeter unit includes two first connecting edges and two second connecting edges connected between the two first connecting edges, wherein the two first connecting edges are arranged corresponding to the sound outlet, the first shielding portion is arranged on the first connecting edge close to the sound outlet; and the two second shielding portions are respectively arranged on the two second connecting edges; An extension length of the second connecting edge is L2, and an extension length of the second shielding portion is a2, wherein 0.1≤a2 / L2≤1; and / or, the extension lengths of the two second shielding portions are the same or different.

7. The sound module according to claim 5, wherein: The outer edge of the tweeter includes two first connecting edges and two second connecting edges connected between the two first connecting edges, wherein the two first connecting edges are arranged corresponding to the sound outlet, and the first shielding portion is arranged on the first connecting edge on the side close to the sound outlet; one of the second shielding portions is arranged on the second connecting edge on the same side, and the other second shielding portion includes a first shielding segment and a second shielding segment, the second shielding segment is arranged on the other second connecting edge and connected to the first shielding segment, and the first shielding segment is arranged on the other first connecting edge and connected to the end of the second shielding segment away from the first shielding segment; The extension length of the first connecting edge is L1, the extension length of the second connecting edge is L2, the extension length of the first blocking segment is b1, and the extension length of the second blocking segment is b2, wherein 0.1≤b1 / L1≤1.2, and b2=L2.

8. The sound module according to claim 1, wherein: The first shielding portion and the second shielding portion are both in contact with the tweeter unit and an inner side surface of the module housing corresponding to the tweeter unit.

9. The sound module according to claim 1, wherein: The retaining wall structure is made of metal or plastic; and / or the retaining wall structure is integrally formed with the module housing; Alternatively, the retaining wall structure is made of sound-absorbing cotton.

10. The sound module according to claim 1, wherein: The tweeter and the woofer are coaxially arranged.

11. The sound module according to any one of claims 1 to 10, wherein: The tweeter unit includes a tweeter diaphragm assembly and a piezoelectric ceramic sheet. The tweeter diaphragm assembly includes a tweeter diaphragm and a tweeter reinforcement part connected to one side of the tweeter diaphragm. The retaining wall structure is connected to the outer edge of the tweeter diaphragm facing the side of the front sound cavity and surrounds the outside of the tweeter reinforcement part. The piezoelectric ceramic sheet is attached to the tweeter reinforcement part.

12. The sound module according to any one of claims 1 to 10, wherein: The tweeter unit includes a tweeter diaphragm assembly and a tweeter voice coil, the tweeter diaphragm assembly includes a tweeter diaphragm and a tweeter reinforcement portion connected to one side of the tweeter diaphragm, the retaining wall structure is connected to the outer edge of the tweeter diaphragm facing the front sound cavity and surrounds the tweeter reinforcement portion; The tweeter voice coil is a planar voice coil connected in parallel to the side of the tweeter reinforcement part facing away from the front sound cavity. The magnetic circuit system forms a first magnetic gap. Along the vibration direction of the tweeter voice coil, the planar voice coil is arranged opposite to the first magnetic gap and is located on the side of the first magnetic gap facing the tweeter diaphragm assembly.

13. The sound module according to any one of claims 1 to 10, wherein: The magnetic circuit system is formed with a first magnetic gap; The tweeter unit includes a tweeter diaphragm assembly and a tweeter voice coil, the tweeter diaphragm assembly includes a tweeter diaphragm and a tweeter reinforcement portion connected to one side of the tweeter diaphragm, the retaining wall structure is connected to the outer edge of the tweeter diaphragm facing the front sound cavity and surrounds the tweeter reinforcement portion; One end of the tweeter voice coil is connected to the tweeter diaphragm assembly, and the other end of the tweeter voice coil extends in a direction away from the front sound cavity and is inserted into the first magnetic gap.

14. The sound module according to any one of claims 1 to 10, wherein: The magnetic circuit system is formed with a first magnetic gap; The tweeter unit includes a tweeter diaphragm assembly and a tweeter voice coil, the tweeter diaphragm assembly includes a tweeter diaphragm and a tweeter reinforcement portion connected to the inner edge of the tweeter diaphragm, the retaining wall structure is connected to the outer edge of the tweeter diaphragm facing the front sound cavity and surrounds the tweeter reinforcement portion; The tweeter voice coil is a flat voice coil extending in a direction away from the front sound cavity, and the tweeter voice coil includes two strip edges spaced apart along the vibration direction of the tweeter voice coil, one of the strip edges is connected to the tweeter diaphragm assembly and is at least partially exposed outside the first magnetic gap, and the other strip edge is inserted in the first magnetic gap.

15. The sound module according to claim 14, wherein: The vibration direction of the tweeter coil is the first direction, each of the strip edges extends along the second direction, the number of the tweeter coils is multiple, and the multiple tweeter coils are spaced apart along the third direction. The first direction, the second direction and the third direction are perpendicular to each other, and the magnetic circuit system forms the first magnetic gap that is consistent with the number of the tweeter coils and corresponds one to one.

16. The sound module according to any one of claims 1 to 10, wherein: The magnetic circuit system is formed with a second magnetic gap; The woofer unit includes a woofer diaphragm assembly and a woofer voice coil. The woofer diaphragm assembly includes a woofer reinforcement portion, an inner woofer surround, and an outer woofer surround surrounding the inner woofer surround. Two ends of the woofer reinforcement portion are respectively connected to the outer edge of the inner woofer surround and the inner edge of the outer woofer surround. One end of the bass voice coil is connected to the bass diaphragm assembly, and the other end of the bass voice coil extends in a direction away from the front sound cavity and is inserted into the second magnetic gap.

17. An electronic device, characterized in that: The electronic device includes a housing and a sound module according to any one of claims 1 to 16 housed in the housing.

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