Loudspeaker module and device

Abstract

A loudspeaker module (100) and a device (1000). The loudspeaker module (100) comprises a first shell (110), a second shell (120), an enclosure (130) and a loudspeaker unit (140), wherein the enclosure (130) is connected to the first shell (110), the enclosure (130) and the first shell (110) jointly enclosing a first air chamber (131); the second shell (120) is connected to the first shell (110), such that the enclosure (130) is located in an inner cavity enclosed by the first shell (110) and the second shell (120); and the loudspeaker unit (140) is arranged in the first air chamber (131). The first shell (110) serves as part of a wall face of the first air chamber (131), so that space in the direction of thickness of the loudspeaker module (100) is fully utilized, eliminating the need for providing a vibration-reducing clearance between the enclosure and first shell of the loudspeaker module, and also eliminating the need for providing an independent wall face on the side of the enclosure facing the first shell in order to reduce the thickness of a single wall of the enclosure, thus enabling the overall thickness of the loudspeaker module (100) to be reduced, while remaining the thickness of the loudspeaker unit (140) unchanged. When the thickness of the loudspeaker module (100) is reduced, the portion of thickness that has been reduced can be used to provide a first air chamber (131) with a greater internal volume, allowing the loudspeaker module (100) to have improved audio performance.

Description

Loudspeaker module and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on September 14, 2023, with application number 202311190229.1 and application name “A Speaker Module and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the technical field of speaker modules, and in particular to a speaker module and device. Background Art

[0003] The speaker module in related devices (such as smart screens and TVs) requires the assembly of a first shell, a second shell, a box and a speaker unit. Usually, the speaker unit is first installed on a box with an air cavity, and then fixed to the second shell as a component. The first shell is then assembled to the second shell so that the box is located between the first shell and the second shell, and the speaker unit is exposed to the first shell to complete the assembly of the speaker module. This assembly method will make the speaker module thicker, which is not conducive to the thinning of the equipment. In addition, affected by the thickness and internal space of the speaker module, the air cavity volume of the box is difficult to further increase, which will affect the audio performance of the speaker module (especially low-frequency sound effects). How to provide a speaker module that meets the requirements of thinness and can exert good audio performance has become an urgent problem that needs to be solved in the industry.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a speaker module and device, which solve the problem of how to provide a speaker module that meets the requirements of thinness and can provide good audio performance.

[0006] The embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, an embodiment of the present application provides a speaker module, comprising: a first shell, a second shell, a box, and a speaker unit. The first shell has a first through hole. The box is connected to the first shell, and the box and the first shell together form a first air cavity, and the first air cavity and the first through hole are connected. The speaker unit is arranged in the first air cavity, the speaker unit is connected to the first shell, and the sound output side of the speaker unit is located at the first through hole. The first shell and the second shell are connected, and the box is located in the inner cavity surrounded by the first shell and the second shell, and a gap is formed between the box and the second shell.

[0008] In the speaker module provided in the embodiment of the present application, the box is connected to the first shell, the box and the first shell together form a first air cavity, the second shell is connected to the first shell, so that the box is located in the inner cavity surrounded by the first shell and the second shell, and the speaker unit is arranged in the first air cavity. The first shell serves as part of the wall surface of the first air cavity, making full use of the thickness direction space of the speaker module. There is no need to set a vibration-damping gap between the box and the first shell as in the speaker module of the related art, nor is there any need to configure an independent wall surface on the side of the box facing the first shell to reduce the thickness of the single wall of the box, so that the overall thickness of the speaker module is thinned and the thickness of the speaker unit can remain unchanged. In the case where the thickness of the speaker module is thinned, the reduced thickness can be used to configure the first air cavity with a larger internal volume, so that the speaker module can achieve better audio performance.

[0009] In an optional implementation, the first shell and the second shell are roughly plate-shaped, and the first shell includes a plate-shaped portion and a frame-shaped portion connected to each other. The plate-shaped portion and the second shell are spaced apart, and the frame-shaped portion is connected to the second shell. The assembled first shell and the second shell occupy a small space and have a compact structure.

[0010] In an optional implementation, the box is installed on the first shell, and the installation method can be fasteners, snaps, welding, riveting, bonding, etc. These methods can fix the box on the side of the first shell facing the second shell, and make the first shell and the box together form a first air cavity.

[0011] In an optional implementation, the box body and the first shell are connected by screws, the box body has a mounting hole, and the first shell has a screw hole corresponding to the mounting hole. The box body is set at a predetermined position on the inner side of the first shell, the mounting hole and the screw hole are set correspondingly, and the screw is passed through the mounting hole of the box body and threadedly connected to the screw hole of the first shell.

[0012] In an optional implementation, the box body and the first shell are connected by a snap-fit ​​connection. The box body has a snap-fit ​​groove, and the inner side surface of the first shell has a snap-fit ​​groove. The snap-fit ​​groove of the first shell is snap-fitted to the snap-fit ​​groove of the box body.

[0013] In an optional implementation, the speaker unit may be a dynamic speaker, a capacitive speaker, a piezoelectric speaker, an electromagnetic speaker, or other different types.

[0014] In one optional implementation, a speaker unit may include a bracket and a vibrating portion disposed on the bracket. The bracket serves as a carrier for the vibrating portion and other internal components of the speaker. The speaker unit can be assembled by installing the bracket in a predetermined position. During operation, the vibrating portion vibrates, driving air to vibrate and produce sound.

[0015] In one alternative implementation, a speaker unit includes a bracket, a magnetic circuit assembly, and a vibration assembly. The magnetic circuit assembly and the vibration assembly are mounted on the bracket. The vibration assembly includes a voice coil and a diaphragm. The voice coil is connected to the diaphragm, which is the vibrating part of the speaker unit.

[0016] In one optional implementation, the magnetic circuit assembly may be generally cylindrical or block-shaped, with an annular magnetic gap on one side. The magnetic circuit assembly provides closed magnetic flux lines passing through its interior and the magnetic gap, generating a magnetic gap magnetic field within the gap. The end of the voice coil distal to the diaphragm may extend into the magnetic gap. When the voice coil receives audio current, it is subjected to a Lorentz force in the magnetic gap magnetic field, causing the voice coil to vibrate axially. The voice coil then drives the diaphragm to vibrate, which in turn drives the air to vibrate, producing sound.

[0017] In an optional implementation, the magnetic circuit assembly may include a first magnetic conductive sheet, a magnetic steel, a second magnetic conductive sheet, and a magnetic bowl. The magnetic steel has an N pole and an S pole that are relatively distributed. The first magnetic conductive sheet and the second magnetic conductive sheet are respectively arranged on opposite sides of the magnetic steel to form an assembly. The assembly formed by the first magnetic conductive sheet, the magnetic steel, and the second magnetic conductive sheet is arranged in the magnetic bowl. The second magnetic conductive sheet is arranged on the inner bottom surface of the magnetic bowl. The outer peripheral surface of the second magnetic conductive sheet and the outer peripheral surface of the magnetic steel are spaced apart from the inner peripheral surface of the magnetic bowl. The outer peripheral surface of the first magnetic conductive sheet and the inner peripheral surface of the magnetic bowl are spaced apart to form a magnetic gap.

[0018] In one optional implementation, a bracket for the speaker unit is fixed to the first shell, with a first vibration-damping damping member extending along a predetermined path interposed between the bracket and the first shell. When the speaker unit is operating, the bracket generates vibration energy, which is absorbed and buffered by the first vibration-damping damping member, weakening the vibration energy transmitted to the first shell. This reduces the vibration sound of the speaker unit during high-power operation and minimizes or suppresses the adverse effects of resonance on sound quality reproduction.

[0019] In an optional implementation, the extension route of the first vibration-damping damping member can be set according to the shape of the connection position between the bracket and the first shell. The shape of the first vibration-damping damping member is adapted to the shape of the first through hole. A smaller-sized first vibration-damping damping member can be configured without occupying too much space in the first shell, thereby achieving a vibration reduction effect.

[0020] In an optional implementation, the first through hole is circular, and the first vibration damping member is circular, so that the inner edge of the first vibration damping member surrounds the edge of the first through hole. The first vibration damping member is sandwiched between the bracket of the speaker unit and the first shell.

[0021] In an optional implementation, the first housing has a first positioning groove corresponding to the first through hole, and one end of the first vibration damping member is installed in the first positioning groove. The first vibration damping member can be quickly positioned in the first positioning groove of the first housing, thereby improving assembly efficiency.

[0022] In an optional implementation, when the box body is installed on the first shell, the inner wall of the first through hole of the first shell extends to form a first surrounding wall, the inner side surface of the first shell and the first surrounding wall form a first positioning groove, and the annular first vibration-damping damping member can be mounted outside the first surrounding wall. The inner circumferential surface of the first vibration-damping damping member and the first surrounding wall are arranged relative to each other, thereby realizing rapid assembly of the first vibration-damping damping member.

[0023] In an optional implementation, when the box is mounted on the first shell, the bracket has a second positioning slot, and one end of the first vibration damping member is mounted in the second positioning slot. The first vibration damping member can be quickly positioned in the second positioning slot of the bracket, improving assembly efficiency.

[0024] In an optional implementation, the bracket of the speaker module has a second surrounding wall and a second annular positioning groove, one end of the annular first vibration-damping damping member can be arranged on the second positioning groove, and the outer peripheral surface of the first vibration-damping damping member and the second surrounding wall are arranged relative to each other to achieve rapid assembly of the first vibration-damping damping member.

[0025] In an optional implementation, a positioning ring may be provided at one end of the first vibration-damping damping member facing the bracket, and the positioning ring is used for positioning and assembling in the second positioning groove, so as to enable the first vibration-damping damping member to be quickly assembled on the bracket.

[0026] In an optional implementation, the first vibration damping member has a first hollow inner cavity therein, and the extension path of the first hollow inner cavity is the same as the extension path of the first vibration damping member. When compressed, it has a larger deformation amount, can absorb more vibration energy, and has a better vibration damping effect.

[0027] In an optional implementation, the first vibration-damping damping member extends in a circular shape, and the first hollow inner cavity extends in a circular shape. Such a structure is easy to form.

[0028] In an optional implementation, the cross section of the first hollow inner cavity is circular, elliptical, rectangular, triangular or other shapes. These shapes of the first middle frame inner cavity structure are easy to form, so that the first vibration damping member has a large deformation amount to enhance the vibration reduction effect.

[0029] In one optional implementation, the first vibration-damping damping member includes a plurality of first annular portions stacked and connected along the axial direction of the speaker unit, with a first annular groove formed on the side surface of the connection between two adjacent first annular portions. The first vibration-damping damping member has a large overall deformation capacity, thereby improving the vibration reduction effect.

[0030] In an optional implementation, the inner and outer circumferential surfaces of each first annular portion are both convex arc surfaces, thereby forming first annular grooves on the inner and outer surfaces of the connection between two adjacent first annular portions, so that each first annular portion has a larger deformation when under pressure.

[0031] In an optional implementation, the box has a second through hole corresponding to the speaker unit, and the bracket of the speaker unit is connected to the second through hole through a vibration-damping ring. The vibration-damping ring includes an outer ring portion and an inner ring portion that are connected. The outer ring portion is located on the outer periphery of the inner ring portion, the outer ring portion is fixed to the box, and the inner ring portion is fixed to one end of the bracket facing the second shell, and the inner ring portion and the second shell are arranged facing each other.

[0032] The speaker unit's operating vibration energy is transmitted to the vibration-damping ring, where it is absorbed and cushioned to a certain extent, reducing the vibration energy transmitted to the cabinet and first shell. The vibration-damping ring can deform within the second via region, giving it a larger deformation range and enhancing its vibration-damping effect.

[0033] In one optional implementation, the second through-hole of the housing is circular, and the outer ring portion of the vibration damping ring is configured to be annular and compatible with the second through-hole, thereby effectively connecting the outer ring portion to the wall of the housing. The end of the bracket facing the second shell is generally circular, and the inner ring portion of the vibration damping ring is configured to be annular and compatible with the bracket end, thereby effectively connecting the inner ring portion to the bracket end.

[0034] In one optional implementation, the outer ring portion and the inner ring portion are connected by a curved, extended fold, with the fold and the second via correspondingly positioned. A vibration damping ring comprising an outer ring portion, fold, and inner ring portion is easily formed. The fold can undergo significant bending deformation to absorb vibration energy, minimizing the vibration energy transmitted to the outer ring portion and the housing, achieving a superior vibration damping effect.

[0035] In an optional implementation, a partial cross-section of the folding ring portion can be set to an arc or other shape convex toward one side of the second shell, which is beneficial for the folding ring portion to absorb vibration energy when the speaker unit vibrates during operation.

[0036] In an optional implementation, in the initial state when the speaker unit is not working, the outer edge of the folded ring portion can be set away from the speaker unit along the axial direction of the speaker unit, and the inner edge of the folded ring portion can be set close to the speaker unit along the axial direction of the speaker unit, so that the folded ring portion has a larger deformation space in the axial direction of the speaker unit to absorb larger vibration energy.

[0037] In one optional implementation, the outer ring portion is fixed to the inner wall of the enclosure. The inner wall of the enclosure refers to the side wall of the enclosure facing the first air cavity. By fully utilizing the axial space of the speaker unit, the first shell and the second shell are kept at a small distance, and the first shell and the enclosure can enclose a first air cavity of a certain volume.

[0038] In one optional implementation, the inner wall of the housing has a retaining groove whose shape matches that of the outer ring, and the outer ring is positioned within the retaining groove. During assembly, the outer ring of the vibration damping ring is quickly placed in the retaining groove of the matching shape, thereby aligning the ring fold and the second via, improving assembly efficiency.

[0039] In one optional implementation, the thickness of the outer ring portion can be greater than that of the folding ring portion. The outer ring portion and the wall of the enclosure can be connected by fasteners. The fasteners can be inserted through the wall of the enclosure and the thicker outer ring portion to securely secure the outer ring portion to the enclosure. The thinner folding ring portion is more easily elastically deformed to absorb and buffer the vibration energy of the speaker unit during operation.

[0040] In an optional implementation, a fixing ring is provided on the inner ring portion, the inner ring portion is located between the bracket and the fixing ring, and the fixing ring, the inner ring portion and the bracket are connected to ensure that the inner ring portion made of elastic material is reliably fixed to the end of the bracket.

[0041] In one optional implementation, a conduit or opening is provided on the wall of the enclosure. A portion of the inner wall of the first shell, the inner wall of the second shell, and the outer wall of the enclosure together form a second air cavity. The first and second air cavities are connected via the conduit or opening. This connection between the first and second air cavities increases the volume of the air cavity. This increased volume allows the speaker module to achieve better low-frequency performance, enhancing low-frequency sound quality.

[0042] In one optional implementation, the first air cavity and the second air cavity are connected via a conduit or an opening, and the first shell has a leakage hole communicating with the second air cavity. When the speaker unit operates at the system resonant frequency, the air within the conduit or opening vibrates and emits sound waves, which then pass through the second air cavity and are emitted outward through the leakage hole, resulting in excellent low-frequency performance.

[0043] In one optional implementation, the enclosure includes a connected plate portion and sidewall portions; the leakage hole may be provided on the plate portion; alternatively, the leakage hole may be provided on the frame portion. When the speaker unit operates at or near the system resonant frequency, the air within the conduit or opening vibrates to generate sound waves, which then pass through the second air cavity and are emitted outward through the leakage hole.

[0044] In an optional implementation, the leakage hole of the first shell can also serve as a heat dissipation hole, and air can enter and exit through the heat dissipation hole to achieve heat dissipation of internal components between the first shell and the second shell.

[0045] In an optional implementation, the cross section of the conduit or the opening may be circular, elliptical, rectangular, triangular, etc. The conduit may be configured as a straight tube, a curved tube, or other shapes.

[0046] In an optional implementation, one or both sides of the box have ducts or openings, so that the first air cavity and the duct (or opening) form a particle forced vibration system with a predetermined resonant frequency, so that the internal air of the duct or opening participates in low-frequency vibration, thereby improving the low-frequency diving performance.

[0047] In one optional implementation, the enclosure includes a plate portion and a sidewall portion connected to each other, the plate portion being spaced apart from the second shell, and the sidewall portion being connected to the first shell on a side distal from the plate portion. The enclosure and the first shell combine to form a first air cavity of a predetermined volume, which serves as a rear cavity for the speaker unit, improving the low-frequency sound quality of the speaker module.

[0048] In one optional implementation, the enclosure has a generally flat, box-like structure, and the plate-like portion can be generally rectangular. The sidewalls are connected to the same side edge of the plate-like portion. The sidewalls can be configured to be relatively small in the thickness direction of the enclosure to reduce the enclosure thickness. The plate-like portion can be configured to have a relatively large length and width, thereby providing the first air cavity with a sufficient internal volume to enhance the low-frequency sound quality of the speaker module.

[0049] In an optional implementation, the duct or opening can be set on the side wall of the box to reduce the distance between the plate body and the second shell, so that the thickness of the overall structure of the speaker module is smaller, which is convenient for application in occasions with smaller thickness and space.

[0050] In one optional implementation, when the cabinet is mounted on the first shell, a second vibration-damping member extending along a predetermined path is interposed between the cabinet and the first shell. When the speaker unit operates, it generates vibration energy, which is absorbed and buffered by the second vibration-damping member, significantly reducing the vibration energy transmitted to the first shell.

[0051] In an optional implementation, the extension route of the second vibration damping member can be set according to the shape of the connection position between the box body and the first shell, so that a smaller-sized second vibration damping member can be configured without occupying too much space in the first shell, thereby achieving a vibration reduction effect.

[0052] In one optional implementation, the housing has a mounting slot extending along the same path as the second vibration damping member, and the second vibration damping member is mounted in the mounting slot. This allows for quick positioning of the second vibration damping member in the housing's mounting slot, improving assembly efficiency.

[0053] In an optional implementation, the side wall portion of the box body extends to form a third surrounding wall, and the side wall portion and the third surrounding wall form a mounting groove. The annular second vibration-damping damping member can be mounted outside the third surrounding wall, and the inner circumference of the second vibration-damping damping member and the third surrounding wall are arranged relative to each other to achieve rapid assembly of the second vibration-damping damping member.

[0054] In one optional implementation, the second vibration damping member has a second hollow cavity therein, and the second hollow cavity extends along the same path as the second vibration damping member. When compressed, the second vibration damping member experiences a greater amount of deformation. The greater the deformation, the more vibration energy it can absorb, resulting in a better vibration damping effect.

[0055] In an optional implementation, the second vibration-damping damping member extends in a substantially rectangular shape, and the second hollow inner cavity extends in a substantially rectangular shape. Such a structure is easy to form.

[0056] In an optional implementation, the cross section of the second hollow cavity is circular, elliptical, rectangular, triangular or other shapes. The second hollow cavity structure of these shapes is easy to form, so that the second vibration damping member has a large deformation amount to enhance the vibration reduction effect.

[0057] In one optional implementation, the second vibration damping member includes a plurality of second annular portions stacked and connected along the axial direction of the speaker unit, with a second annular groove formed on the side surface of the connection between two adjacent second annular portions. The second vibration damping member has a large overall deformation capacity, thereby improving the vibration reduction effect.

[0058] In an optional implementation, the inner and outer circumferential surfaces of each second annular portion are both convex arc surfaces or convex surfaces of other shapes, thereby forming second annular grooves on the inner and outer surfaces of the connection between two adjacent second annular portions, so that each second annular portion has a larger deformation when under pressure.

[0059] In one optional implementation, the first shell has a third via hole at a location corresponding to the cabinet, the third via hole communicating with the first air cavity, a first passive vibration plate disposed at the third via hole, and an edge of the first passive vibration plate connected to the first shell. The speaker unit operates at or near the system resonant frequency, improving low-frequency radiation efficiency and enhancing the low-frequency dive performance of the speaker module.

[0060] In an optional implementation, the shape of the first passive vibration plate is adapted to the shape of the third through hole, so that the first passive vibration plate covers the third through hole of the first shell.

[0061] In an optional implementation, the first passive vibration plate includes a plate member and a folding ring member, the plate member is connected to an inner edge of the folding ring member, and an outer edge of the folding ring member is connected to a wall surface of the third through hole of the first shell.

[0062] In an optional implementation, a third vibration damping member may be provided between the first passive vibration plate and the wall surface of the first shell to reduce the vibration energy transmitted to the first shell when the first passive vibration plate vibrates, thereby achieving a vibration reduction effect.

[0063] In an optional implementation, the first via and the third via can be arranged adjacent to each other, a speaker unit is arranged at the first via, and a first passive vibration plate is arranged at the third via, so that the speaker unit vibrates and makes sounds when it is working. The working vibration of the speaker unit causes the air inside the first air cavity to vibrate to drive the first passive vibration plate to vibrate and make sounds, thereby improving the low-frequency diving performance of the speaker module.

[0064] In one optional implementation, the first shell has a leakage hole communicating with the second air cavity; the housing has a fourth through-hole communicating with the first air cavity, a second passive vibration plate is disposed at the fourth through-hole, and the edge of the second passive vibration plate is connected to the housing. The speaker unit operates at or near the system's resonant frequency, and sound waves generated by the second passive vibration plate radiate outward through the leakage hole through the second air cavity, thereby improving low-frequency radiation efficiency and enhancing the low-frequency diving performance of the speaker module.

[0065] In an optional implementation, the third through hole of the first shell and the fourth through hole of the box are arranged relative to each other, the first passive vibration plate is arranged at the third through hole, and the second passive vibration plate is arranged at the fourth through hole, which is beneficial to the vibration of the vibration part of the speaker unit. The air inside the first air cavity drives the first passive vibration plate and the second passive vibration plate to vibrate, thereby improving the low-frequency diving performance of the speaker module.

[0066] In an optional implementation, a fourth vibration-reducing damping member may be provided between the second passive vibration plate and the wall of the box body, for reducing the vibration energy transmitted to the box body when the second passive vibration plate vibrates, thereby achieving a vibration reduction effect.

[0067] In one optional implementation, the cabinet and the first shell are integrally molded. The integral structure of the cabinet and the first shell is formed by integral molding, and the integral structure has a first air cavity. During assembly, the speaker unit can be directly mounted on the first through hole of the first shell, resulting in high assembly efficiency.

[0068] In an optional implementation, the first shell and the box body are both made of plastic and are integrally injection molded.

[0069] In an optional implementation, the box body is made of plastic, a portion of the first shell is made of plastic and another portion is made of metal, and the first shell and the box body can be molded by insert injection molding.

[0070] In an optional implementation, when the box body and the first shell are an integrated structure, the bracket of the speaker unit is fixed on the first shell, and a first vibration-damping damping member extending along a predetermined route is sandwiched between the bracket and the first shell. The outer side surface of the first shell is provided with a first annular positioning groove connected to the first through hole, and the annular first vibration-damping damping member is arranged in the first positioning groove to realize rapid assembly of the first vibration-damping damping member.

[0071] In a second aspect, an embodiment of the present application provides a device comprising the above-mentioned speaker module.

[0072] The device provided in the embodiments of the present application utilizes the aforementioned speaker module, reducing the vibration-damping gap between the cabinet and the first shell, as well as the individual wall thickness of the cabinet, in speaker modules of the related art. This reduces the overall thickness of the speaker module, allowing the thickness of the entire device to be thinner while maintaining the thickness of the speaker unit. With the reduced thickness of the speaker module, the reduced thickness can be used to create a larger first air cavity, enabling the speaker module to achieve better audio performance.

[0073] In one optional implementation, the first shell is a rear shell, and the second shell is a back plate. The rear shell includes a plate-shaped portion and a frame-shaped portion connected to each other. The plate-shaped portion and the back plate are spaced apart, and the frame-shaped portion is connected to the back plate. The frame-shaped portion is used to connect the plate-shaped portion and the back plate, so that the plate-shaped portion and the back plate are spaced apart.

[0074] In an optional implementation, the first through hole may be provided in the plate-shaped portion, the axis of the speaker unit is perpendicular to the plate-shaped portion, and the speaker unit is provided at the first through hole to emit sound to the outside of the plate-shaped portion.

[0075] In an optional implementation, the first through hole may be provided in the frame-shaped portion, the axis of the speaker unit is perpendicular to the frame-shaped portion, and the speaker unit is provided at the first through hole to emit sound to the outside of the frame-shaped portion.

[0076] In an optional implementation, the device further includes a screen assembly, which is disposed on a side of the second shell facing away from the first shell. The screen assembly is used to display image information and play sound through the speaker module, thereby forming a display device with sound playback function.

[0077] In one optional implementation, when the speaker module is used in a car audio system, the first shell serves as the top shell, the second shell serves as the bottom shell, and the speaker unit is mounted on the top shell to output sound outward from the top shell. The speaker module has a relatively low overall thickness and can be used in compact areas of a car. The thickness of the speaker unit can remain unchanged, allowing the speaker module to deliver superior audio performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] FIG1 is a schematic diagram of a partial structure of a speaker module in the related art;

[0079] FIG2 is a schematic diagram of a partial structure of another speaker module in the related art;

[0080] FIG3 is a schematic diagram of a partial structure of a speaker module provided in an embodiment of the present application;

[0081] FIG4 is a three-dimensional assembly diagram of a speaker module provided in another embodiment of the present application;

[0082] FIG5 is an exploded perspective view of the speaker module of FIG4 ;

[0083] FIG6 is a schematic structural diagram of a speaker unit in a speaker module provided in an embodiment of the present application;

[0084] FIG7 is a three-dimensional assembly diagram of the speaker module of FIG5 including the cabinet, the speaker unit, and the first vibration damping member;

[0085] FIG8 is a perspective exploded view of the cabinet, the speaker unit, the first vibration damping member, and other structures of FIG7;

[0086] FIG9 is a partial cross-sectional view taken along line AA of FIG4 ;

[0087] FIG10 is a perspective cross-sectional view of the first vibration-damping damping member of FIG8 ;

[0088] FIG11 is a three-dimensional assembly view of the cabinet, speaker unit, first vibration damping member, and other structures of FIG7 from another angle;

[0089] FIG12 is a schematic diagram of a partial structure of a speaker module provided in another embodiment of the present application;

[0090] FIG13 is a schematic diagram of a partial structure of a speaker module provided in another embodiment of the present application;

[0091] FIG14 is a schematic diagram of a partial structure of a speaker module provided in another embodiment of the present application;

[0092] FIG15 (a) and (b) are schematic diagrams of the speaker module of FIG14 when the operating frequency is very low;

[0093] FIG16 (a) and (b) are schematic diagrams of the speaker module of FIG14 operating near the system resonant frequency;

[0094] FIG17 is an enlarged view of point B in FIG4 ;

[0095] FIG18 is a partial perspective cross-sectional view of the second vibration-damping damping member in FIG8 ;

[0096] FIG19 is a partial cross-sectional view taken along line CC of FIG4 ;

[0097] FIG20 is a schematic diagram of a partial structure of a speaker module provided in another embodiment of the present application;

[0098] FIG21 is a three-dimensional assembly diagram of a speaker module provided in another embodiment of the present application;

[0099] FIG22 is an exploded perspective view of the speaker module of FIG21 ;

[0100] FIG23 is an exploded perspective view of the speaker module of FIG21 from another angle;

[0101] FIG24 is a partial cross-sectional view taken along line DD of FIG21;

[0102] FIG25 is a frequency response diagram of a related art speaker module and a speaker module provided in an embodiment of the present application;

[0103] Figure 26 is a schematic diagram of the partial structure of the device provided in an embodiment of the present application.

[0104] Explanation of Reference Numerals: 10 - speaker module; 11 - first housing; 11a - through hole; 12 - second housing; 13 - cabinet; 13a - air cavity; 13b - vibration-damping gap; 13c - wall thickness; 14 - speaker unit; 100 - speaker module; 110 - first housing; 111 - plate-shaped portion; 1111 - first through hole; 1112 - first positioning groove; 1113 - first surrounding wall; 1114 - third through hole; 112 - frame-shaped portion; 113 - second air cavity; 114 - leakage hole; 120 - second housing; 130 - cabinet; 131 - first air cavity; 130a - gap; 132 - conduit; 132a - opening; 133 - plate portion; 1331 - second through hole; 1332 - Limiting groove; 1333 - Fourth through-hole; 134 - Sidewall; 1341 - Mounting groove; 1342 - Third surrounding wall; 140 - Speaker unit; 140a - Sound output side; 140b - Magnetic gap; 140c - Axial direction; 141 - Bracket; 1411 - Second positioning groove; 1412 - Second surrounding wall; 142 - Magnetic circuit assembly; 1421 - First magnetic conductive sheet; 1422 - Magnet; 1423 - Second magnetic conductive sheet; 1424 - Magnetic bowl; 143 - Vibration assembly; 1431 - Voice coil; 1432 - Diaphragm; 150 - First vibration damping element; 151 - Positioning ring; 152 - First hollow cavity; 153 - First annular portion; 154 - First annular groove; 160-vibration-damping ring; 161-outer ring portion; 162-inner ring portion; 163-folded ring portion; 164-fastener; 165-fixing ring; 166-fastener; 170-second vibration-damping damping member; 171-second hollow inner cavity; 172-second annular portion; 173-second annular groove; 180-first passive vibration plate; 181-plate member; 182-folded ring member; 183-third vibration-damping damping member; 190-second passive vibration plate; 191-fourth vibration-damping damping member; 200-screen assembly; 1000-equipment. DETAILED DESCRIPTION

[0105] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application. Although the description of this application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of introducing the application in conjunction with the embodiment is to cover other options or modifications that may be extended based on the claims of this application. In order to provide an in-depth understanding of the application, the following description will contain many specific details. This application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of this application, some specific details will be omitted in the description. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other unless there is a conflict.

[0106] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0107] It should be understood that in the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The orientation or positional relationship indicated by the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, and 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, and therefore cannot be understood as a limitation on the present application.

[0108] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0109] In the embodiments of this application, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0110] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0111] Please refer to Figures 1 and 2. The speaker module 10 in related technical equipment (such as smart screens and televisions) includes a first shell 11, a second shell 12, a box 13, and a speaker unit 14. The speaker unit 14 is installed on the box 13 having an air cavity 13a and fixed to the second shell 12 as a whole component. The first shell 11 is then assembled to the second shell 12 so that the box 13 is located between the first shell 11 and the second shell 12. The sound output side of the speaker unit 14 is exposed at the through hole 11a of the first shell 11. This assembly method will make the speaker module 10 thicker, which is not conducive to the thinning of the device.

[0112] To reduce the transmission of vibrations from the speaker unit 14 during operation to the first and second shells 11 and 12, a certain vibration-damping gap 13b is maintained between the two opposing walls of the cabinet 13 along the axial direction of the speaker unit 14 and the first and second shells 11 and 12, respectively. For example, when a woofer speaker unit 14 is used, the vibration-damping gap 13b is 4.5 mm, and when a full-range speaker unit 14 is used, the vibration-damping gap 13b is 1 mm. The presence of the vibration-damping gap 13b increases the thickness of the speaker module 10.

[0113] To enhance the structural strength of the enclosure 13 and achieve a vibration-damping effect, the wall thickness 13c of the enclosure 13 can be increased when the enclosure 13 is made of plastic. For example, when a woofer speaker unit 14 is used, the thickness 13c of the individual enclosure walls 13 is 3.5 mm, while when a full-range speaker unit 14 is used, the thickness 13c of the individual enclosure walls 13 is 2 mm. The thickness 13c of the walls 13 on opposite sides of the enclosure 13 increases the thickness of the speaker module 10.

[0114] The speaker unit 14 has a vibrating part, which vibrates to drive the air to vibrate and produce sound during operation. In the case where the front and back sides of the vibrating part of the speaker unit 14 are not isolated, the vibrating part will vibrate forward and backward during operation, and the sound waves generated by the front side of the vibrating part and the sound waves generated by the back side are in reverse phase. The low-frequency sound waves generated by the front side of the vibrating part are easily diffracted to the back side, and the low-frequency sound waves generated by the back side of the vibrating part are easily diffracted to the front side. The low-frequency sound waves on the front and back sides of the vibrating part will be offset, the sound will be very small, and an acoustic short circuit will occur. The low-frequency range can be 20 Hz to 200 Hz, and is not specifically limited.

[0115] In order to avoid acoustic short circuit, the speaker unit 14 is arranged in the air cavity 13a, and the front and back sides of the vibration part are isolated by the box body 13. The sound waves generated by the front side of the vibration part propagate outward, and the sound waves generated by the back side of the vibration part are in the air cavity 13a of the box body 13. The low-frequency sound waves generated by the front and back sides of the vibration part will not be offset, the sound is amplified, and the acoustic short circuit phenomenon is avoided.

[0116] The air inside air cavity 13a can be considered an air spring. The presence of the air spring increases the resistance experienced by the vibrating portion during operation, thereby increasing the resonant frequency of speaker unit 14. The lower operating frequency limit of speaker unit 14 is near its resonant frequency. An increase in the resonant frequency of speaker unit 14 increases its lower operating frequency limit, deteriorating its low-frequency diving performance.

[0117] The larger the volume of air cavity 13a, the smaller the resistance of the air spring formed by the air inside air cavity 13a, the easier it is for the vibrating portion of speaker unit 14 to deform, and the smaller the impact on the resonant frequency of speaker unit 14. By increasing the volume of air cavity 13a, better low-frequency diving performance can be achieved, improving low-frequency sound effects.

[0118] When speaker module 10 is assembled using the above method, the volume of air cavity 13a of cabinet 13 is difficult to increase due to the thickness and internal space of speaker module 10. This affects the audio performance (especially low-frequency sound effects) of speaker module 10. The need for thinner speaker module 10 and good audio performance are in conflict. How to provide a speaker module that meets the requirements of thinness and good audio performance has become an urgent problem in the industry.

[0119] In order to solve the above problems, referring to FIG3 , an embodiment of the present application provides a speaker module 100, comprising: a first shell 110, a second shell 120, a box 130 and a speaker unit 140. The first shell 110 has a first through hole 1111. The box 130 is connected to the first shell 110, and the box 130 and the first shell 110 together form a first air cavity 131, and the first air cavity 131 is connected to the first through hole 1111. The speaker unit 140 is arranged in the first air cavity 131, and the speaker unit 140 is connected to the first shell 110, and the sound output side 140a of the speaker unit 140 is located at the first through hole 1111. The first shell 110 and the second shell 120 are connected, and the box 130 is located in the inner cavity enclosed by the first shell 110 and the second shell 120, and a gap 130a is formed between the box 130 and the second shell 120.

[0120] The first air cavity 131 and the first via 1111 are connected when the speaker unit 140 is not installed in the first air cavity 131. The sound output side 140a of the speaker unit 140 is where the vibrating portion of the speaker unit 140 is located. During operation, the vibrating portion vibrates to drive the air to vibrate and produce sound.

[0121] In the speaker module 100 provided in the embodiment of the present application, the box 130 is connected to the first shell 110. The box 130 and the first shell 110 together enclose a first air cavity 131. The second shell 120 is connected to the first shell 110, so that the box 130 is located in the inner cavity enclosed by the first shell 110 and the second shell 120, and the speaker unit 140 is disposed in the first air cavity 131. The first shell 110 serves as a partial wall surface of the first air cavity 131, making full use of the space in the thickness direction of the speaker module 100. There is no need to provide a vibration-damping gap 13b between the box 13 and the first shell 11 in the related art speaker module 10 as shown in Figures 1 and 2, nor is there a need to configure an independent wall surface on the side of the box 13 facing the first shell 11 to reduce the thickness 13c of the single wall of the box 13. This reduces the overall thickness of the speaker module 100, while maintaining the thickness of the speaker unit 140. When the thickness of the speaker module 100 is reduced, the reduced thickness can be used to configure the first air cavity 131 with a larger internal volume, so that the speaker module 100 can achieve better audio performance.

[0122] When setting the first shell 110 and the second shell 120, specific shapes can be set as needed. For example, referring to Figures 4 and 5, the first shell 110 and the second shell 120 are roughly plate-shaped, and the first shell 110 includes a plate-shaped portion 111 and a frame-shaped portion 112 connected to each other. The plate-shaped portion 111 and the second shell 120 are spaced apart, and the frame-shaped portion 112 is connected to the second shell 120. After assembly, the first shell 110 and the second shell 120 occupy a small space and have a compact structure. The frame-shaped portion 112 and the second shell 120 can be connected by fasteners, snaps, etc. In addition, the first shell 110 and the second shell 120 can also be set to other shapes.

[0123] There are multiple optional implementations for connecting the housing 130 to the first shell 110. In some embodiments, referring to FIG3 , the housing 130 can be mounted on the first shell 110 using fasteners (e.g., screws), snaps, welding, riveting, or bonding. These methods can secure the housing 130 to the side of the first shell 110 facing the second shell 120, and allow the first shell 110 and the housing 130 to collectively enclose a first air cavity 131. The housing 130 and the first shell 110 can be made of materials such as plastic, metal, and wood.

[0124] Exemplarily, the box body 130 and the first shell 110 are connected by screws. The box body 130 has a mounting hole, and the first shell 110 has a screw hole corresponding to the mounting hole. The box body 130 is set at a predetermined position on the inner side of the first shell 110, and the mounting hole and the screw hole are set correspondingly. The screw is passed through the mounting hole of the box body 130 and threadedly connected to the screw hole of the first shell 110, so that the box body 130 can be reliably fixed on the first shell 110.

[0125] Exemplarily, the box body 130 and the first shell 110 are connected by a snap-fit ​​connection. The box body 130 has a slot, and the inner side of the first shell 110 has a snap-fit. By snapping the snap-fit ​​of the first shell 110 into the slot of the box body 130, the box body 130 can be reliably fixed on the first shell 110.

[0126] When setting up the speaker unit 140, the speaker unit 140 is a transducer device that converts electrical signals into acoustic signals. It can be a dynamic (electric) speaker, a capacitive (electrostatic) speaker, a piezoelectric (crystal or ceramic) speaker, an electromagnetic (compression spring) speaker, and other different types. The specific type is selected as needed. The speaker unit 140 may include a bracket and a vibrating part provided on the bracket. The bracket is the carrier part of the internal components of the speaker, such as the vibrating part. The speaker unit 140 can be assembled by installing the bracket to a predetermined position. During operation, the vibrating part vibrates to drive the air to vibrate and produce sound.

[0127] Taking the dynamic speaker shown in Figure 6 as an example, speaker unit 140 includes a bracket 141, a magnetic circuit assembly 142, and a vibration assembly 143. Magnetic circuit assembly 142 and vibration assembly 143 are mounted on bracket 141. Vibration assembly 143 includes a voice coil 1431 and a diaphragm 1432. Voice coil 1431 is connected to diaphragm 1432, which is the vibrating part of speaker unit 140.

[0128] The magnetic circuit assembly 142 can be roughly cylindrical or block-shaped. One side of the magnetic circuit assembly 142 has an annular magnetic gap 140b. The magnetic circuit assembly 142 provides closed magnetic flux lines passing through its interior and the magnetic gap 140b, generating a magnetic gap magnetic field within the magnetic gap 140b. The end of the voice coil 1431, distal from the diaphragm 1432, can extend into the magnetic gap 140b. When the voice coil 1431 receives audio current, it experiences a Lorentz force within the magnetic gap magnetic field, causing it to vibrate axially. This in turn drives the diaphragm 1432 to vibrate, which in turn drives the air to vibrate, producing sound.

[0129] The magnetic circuit assembly 142 may include a first magnetic conductive sheet 1421, a magnetic steel 1422, a second magnetic conductive sheet 1423, and a magnetic bowl 1424. The magnetic steel 1422 has an oppositely distributed north pole and south pole. The first magnetic conductive sheet 1421 and the second magnetic conductive sheet 1423 are respectively arranged on opposite sides of the magnetic steel 1422 to form an assembly. The assembly formed by the first magnetic conductive sheet 1421, the magnetic steel 1422, and the second magnetic conductive sheet 1423 is arranged in the magnetic bowl 1424. The second magnetic conductive sheet 1423 is arranged on the inner bottom surface of the magnetic bowl 1424. The outer circumference of the second magnetic conductive sheet 1423 and the outer circumference of the magnetic steel 1422 are spaced apart from the inner circumference of the magnetic bowl 1424. The outer circumference of the first magnetic conductive sheet 1421 and the inner circumference of the magnetic bowl 1424 are spaced apart to form a magnetic gap 140b.

[0130] The magnet 1422 may be made of permanent magnet materials such as ferrite and neodymium iron boron. The first magnetic conductive sheet 1421, the magnetic bowl 1424, and the second magnetic conductive sheet 1423 may be made of pure iron with high magnetic permeability. The magnetic bowl 1424 may be roughly bowl-shaped, with a longitudinal cross-section of the magnetic bowl 1424 being roughly U-shaped. When the north pole of the magnet 1422 faces the first magnetic conductive sheet 1421 and the south pole faces the second magnetic conductive sheet 1423, the magnetic lines of force emitted by the north pole of the magnet 1422 may extend along the first magnetic conductive sheet 1421, the magnetic gap 140b, the magnetic bowl 1424, and the second magnetic conductive sheet 1423, and then return to the south pole of the magnet 1422, generating a magnetic gap magnetic field in the magnetic gap 140b. The magnetic bowl 1424 is mounted on the bracket 141 to fix the magnetic circuit assembly 142 to the bracket 141.

[0131] In order to reduce the adverse effects of the working vibration of the speaker unit 140, in some embodiments, referring to Figures 7 to 9, the bracket 141 of the speaker unit 140 is fixed to the first shell 110, and a first vibration damping member 150 extending along a predetermined route is sandwiched between the bracket 141 and the first shell 110.

[0132] When the speaker unit 140 is operating, the bracket 141 generates vibration energy, which may be transmitted to the connection between the bracket 141 and the first housing 110. This vibration energy is absorbed and buffered by the first vibration-damping damping member 150, making the vibration energy transmitted to the first housing 110 very weak. This reduces the vibration sound of the speaker unit 140 when operating at high power, reduces or suppresses the adverse effects of resonance on sound quality reproduction, and better utilizes the acoustic performance of the speaker unit 140, improving the user experience. The first vibration-damping damping member 150 can be made of elastic materials such as rubber and silicone.

[0133] The extension route of the first vibration-damping damping member 150 can be set according to the shape of the connection position of the bracket 141 and the first shell 110. The shape of the first vibration-damping damping member 150 is adapted to the shape of the first through hole 1111. In this way, a smaller-sized first vibration-damping damping member 150 can be configured without occupying too much space in the first shell 110, thereby achieving a vibration reduction effect.

[0134] For example, the first through hole 1111 is configured as a circle, and the first vibration-damping damping member 150 is configured as a circle, so that the inner edge of the first vibration-damping damping member 150 surrounds the edge of the first through hole 1111. The first vibration-damping damping member 150 is sandwiched between the bracket 141 of the speaker unit 140 and the first shell 110. The bracket 141 can be fixed to the first shell 110 using fasteners (such as screws) or snaps. In addition, the first through hole 1111 and the first vibration-damping damping member 150 can also be configured as a rounded rectangle or other shapes.

[0135] To position and assemble the first vibration-damping member 150 on the first housing 110, in some embodiments, referring to FIG. 9 , the first housing 110 has a first positioning slot 1112 corresponding to the first through-hole 1111. One end of the first vibration-damping member 150 is mounted in the first positioning slot 1112. When assembling the first vibration-damping member 150 to the first housing 110, the first vibration-damping member 150 can be quickly positioned in the first positioning slot 1112 of the first housing 110 without having to adjust the assembly position multiple times, thereby improving assembly efficiency.

[0136] For example, referring to Figure 9, when the box body 130 is installed on the first shell 110, the inner wall of the first through hole 1111 of the first shell 110 extends to form a first surrounding wall 1113, and the inner side surface of the first shell 110 and the first surrounding wall 1113 form a first positioning groove 1112. The annular first vibration-damping damping member 150 can be mounted outside the first surrounding wall 1113, and the inner circumferential surface of the first vibration-damping damping member 150 and the first surrounding wall 1113 are arranged relative to each other, so as to realize the rapid assembly of the first vibration-damping damping member 150.

[0137] To position and assemble the first vibration-damping damping member 150 on the bracket 141 of the speaker unit 140, in some embodiments, referring to Figures 6, 8, and 9, when the cabinet 130 is mounted on the first shell 110, the bracket 141 has a second positioning slot 1411, and one end of the first vibration-damping damping member 150 is mounted in the second positioning slot 1411. When assembling the first vibration-damping damping member 150 to the speaker unit 140, the first vibration-damping damping member 150 can be quickly positioned in the second positioning slot 1411 of the bracket 141 without having to adjust the assembly position multiple times, thereby improving assembly efficiency.

[0138] Exemplarily, the bracket 141 of the speaker module 100 has a second surrounding wall 1412 and a second annular positioning groove 1411. One end of the annular first vibration-damping damping member 150 can be arranged on the second positioning groove 1411. The outer peripheral surface of the first vibration-damping damping member 150 and the second surrounding wall 1412 are arranged relative to each other to achieve rapid assembly of the first vibration-damping damping member 150.

[0139] A positioning ring 151 may be provided at one end of the first vibration damping member 150 facing the bracket 141 . The positioning ring 151 is used to be positioned and assembled in the second positioning groove 1411 , so as to enable the first vibration damping member 150 to be quickly assembled on the bracket 141 .

[0140] In order to make the first vibration damping member 150 have a larger deformation to enhance the vibration reduction effect, in some embodiments, referring to Figures 9 and 10, the first vibration damping member 150 has a first hollow inner cavity 152 inside, and the extension path of the first hollow inner cavity 152 is the same as the extension path of the first vibration damping member 150.

[0141] The first vibration damping element 150, located within the first middle frame cavity, forms a spring-like structure. It experiences significant deformation when compressed, but returns to its unstressed configuration when the external force is removed. The greater the deformation of the first vibration damping element 150, the more vibration energy it can absorb, resulting in a better vibration damping effect, minimizing the adverse effects of high-power vibration on the speaker unit 140.

[0142] For example, the first vibration damping member 150 extends in a circular shape, and the first hollow inner cavity 152 extends in a circular shape. Such a structure is easy to form. In addition, the first vibration damping member 150 and the first hollow inner cavity 152 can also be set to a rounded rectangle or other shapes.

[0143] When configuring the first hollow inner cavity 152, referring to Figures 9 and 10, the cross-section of the first hollow inner cavity 152 is circular, elliptical, rectangular, triangular, or other shapes. These shapes of the first middle frame inner cavity structure are easy to form, allowing the first vibration damping member 150 to have a large deformation range to enhance the vibration reduction effect.

[0144] In order to make the first vibration-damping damping member 150 have a larger deformation to enhance the vibration-damping effect, in some embodiments, referring to Figures 9 and 10, the first vibration-damping damping member 150 includes a plurality of first annular portions 153 stacked and connected along the axial direction 140c of the speaker unit 140, and a first annular groove 154 is formed on the side of the connection between two adjacent first annular portions 153.

[0145] When the working vibration of the speaker unit 140 is transmitted to the first vibration-damping damping member 150, each first annular portion 153 in the first vibration-damping damping member 150 is compressed and deformed, and the side surface of the connection between two adjacent first annular portions 153 has a first annular groove 154, so that the side area of ​​the two adjacent first annular portions 153 has a large deformation displacement. When the external force is removed, each first annular portion 153 quickly returns to an unstressed state, and the first vibration-damping damping member 150 as a whole has a large deformation amount, thereby improving the vibration reduction effect.

[0146] For example, referring to Figure 10, the inner and outer circumferential surfaces of each first annular portion 153 are both convex arc surfaces or convex surfaces of other shapes, so that first annular grooves 154 are respectively formed on the inner and outer surfaces of the connection between two adjacent first annular portions 153, so that each first annular portion 153 has a larger deformation amount when under pressure.

[0147] In order to reduce the adverse effects of the working vibration of the speaker unit 140, in some embodiments, referring to Figures 8 and 9, the box body 130 has a second through hole 1331 corresponding to the speaker unit 140, and the bracket 141 of the speaker unit 140 is connected to the second through hole 1331 through the vibration-damping ring 160. The vibration-damping ring 160 includes an outer ring portion 161 and an inner ring portion 162 that are connected to each other. The outer ring portion 161 is located at the outer periphery of the inner ring portion 162, the outer ring portion 161 is fixed on the box body 130, and the inner ring portion 162 is fixed to one end of the bracket 141 facing the second shell 120, and the inner ring portion 162 and the second shell 120 are arranged facing each other.

[0148] The bracket 141 of the speaker unit 140 is suspended at the second through-hole 1331 of the housing 130 via a vibration-damping ring 160. The operating vibration energy of the speaker unit 140 is transmitted to the vibration-damping ring 160, where the vibration energy is absorbed and buffered to a certain extent. This reduces the vibration energy transmitted to the housing 130 and the first shell 110, reduces the vibration sound of the housing 130 and the first shell 110 when the speaker unit 140 is operating at high power, and reduces or suppresses the adverse effects of resonance on sound quality playback, thereby better utilizing the acoustic performance of the speaker unit 140 and improving the user experience. The vibration-damping ring 160 is arranged in correspondence with the second through-hole 1331 of the housing 130, allowing the vibration-damping ring 160 to deform within the area of ​​the second through-hole 1331, giving the vibration-damping ring 160 a larger deformation range and enhancing the vibration-damping effect of the vibration-damping ring 160. The vibration-damping ring 160 can be made of an elastic material such as rubber or silicone. The outer ring portion 161 and the box body 130 , and the inner ring portion 162 and the bracket 141 can be connected by fasteners, bonding, or the like.

[0149] The shape of the vibration-damping ring 160 can be configured based on the shapes of the second through-hole 1331 of the housing 130 and the end of the bracket 141, allowing the vibration-damping ring 160 to be connected to the bracket 141 of the speaker unit 140 and the housing 130. For example, the second through-hole 1331 of the housing 130 is circular, and the outer ring portion 161 of the vibration-damping ring 160 is configured as a ring that matches the second through-hole 1331, allowing the outer ring portion 161 to be effectively connected to the wall of the housing 130. The end of the bracket 141 facing the second shell 120 is generally circular, and the inner ring portion 162 of the vibration-damping ring 160 is configured as a ring that matches the end of the bracket 141, allowing the inner ring portion 162 to be effectively connected to the end of the bracket 141. Furthermore, the second through-hole 1331, the end of the bracket 141, and the outer and inner ring portions 161 and 162 of the vibration-damping ring 160 can also be configured as roughly rounded rectangles or other shapes.

[0150] When setting the vibration-damping ring 160, referring to Figures 8 and 9, the outer ring portion 161 and the inner ring portion 162 are connected by a bent and extended folded ring portion 163, and the folded ring portion 163 and the second through hole 1331 are correspondingly arranged. The vibration-damping ring 160 having the outer ring portion 161, the folded ring portion 163 and the inner ring portion 162 is easy to form. When the vibration energy of the speaker unit 140 is transmitted to the folded ring portion 163 through the inner ring portion 162, the folded ring portion 163 can produce a large bending deformation to absorb the vibration energy, thereby reducing the vibration energy transmitted to the outer ring portion 161 and the cabinet 130. This prevents excessive transmission of the vibration energy of the speaker unit 140 to the cabinet 130 and achieves a better vibration reduction effect.

[0151] When the folding ring portion 163 is provided, referring to FIG9 , a partial cross-section of the folding ring portion 163 can be provided as an arc or other shape convex toward one side of the second shell 120 , so as to facilitate the absorption of vibration energy by the folding ring portion 163 when the speaker unit 140 vibrates during operation.

[0152] Referring to Figure 9, in the initial state where the speaker unit 140 is not working, the outer edge of the folded ring portion 163 (i.e., the connection position between the folded ring portion 163 and the outer ring portion 161) can be set away from the speaker unit 140 along the axial direction 140c of the speaker unit 140, and the inner edge of the folded ring portion 163 (i.e., the connection position between the folded ring portion 163 and the inner ring portion 162) can be set close to the speaker unit 140 along the axial direction 140c of the speaker unit 140, so that the folded ring portion 163 has a larger deformation space in the axial direction 140c of the speaker unit 140 to absorb larger vibration energy, thereby achieving better vibration reduction effect.

[0153] When vibration damping ring 160 is assembled to enclosure 130, as shown in Figure 9 , outer ring portion 161 is fixed to the inner wall of enclosure 130. The inner wall of enclosure 130 refers to the side wall of enclosure 130 facing first air cavity 131. By fully utilizing the axial space of speaker unit 140 and maintaining a relatively small distance between first shell 110 and second shell 120, first shell 110 and enclosure 130 can enclose first air cavity 131 of a predetermined volume.

[0154] When the vibration damping ring 160 is assembled into the housing 130, referring to Figures 8 and 9, the inner wall of the housing 130 has a retaining groove 1332. The shape of the retaining groove 1332 matches the shape of the outer ring portion 161, and the outer ring portion 161 is positioned in the retaining groove 1332. During assembly, the outer ring portion 161 of the vibration damping ring 160 is quickly placed into the retaining groove 1332 of the matching shape, and the folded ring portion 163 of the vibration damping ring 160 is aligned with the second through-hole 1331, eliminating the need for frequent adjustments to the position of the vibration damping ring 160 and improving assembly efficiency.

[0155] For example, the outer ring portion 161 of the vibration damping ring 160 is annular, and the limiting groove 1332 is annular to match, so that the outer ring portion 161 can be quickly positioned and installed at a predetermined position of the box body 130. In addition, the outer ring portion 161 of the vibration damping ring 160 and the limiting groove 1332 can also be rounded rectangles or other shapes.

[0156] When configuring the outer ring portion 161 and the folded ring portion 163, referring to FIG9 , the thickness of the outer ring portion 161 can be greater than that of the folded ring portion 163. The outer ring portion 161 and the wall of the cabinet 130 can be connected via fasteners 164 (e.g., screws). The fasteners 164 can penetrate the wall of the cabinet 130 and the thicker outer ring portion 161, thereby reliably securing the outer ring portion 161 to the cabinet 130. The thinner folded ring portion 163 is easily elastically deformed to absorb and buffer the vibration energy of the speaker unit 140 during operation.

[0157] When the inner ring portion 162 of the vibration-damping ring 160 is connected to the bracket 141 of the speaker unit 140, referring to Figures 8, 9, and 11, a fixing ring 165 is provided on the inner ring portion 162, and the inner ring portion 162 is located between the bracket 141 and the fixing ring 165, and the fixing ring 165, the inner ring portion 162, and the bracket 141 are connected.

[0158] During assembly, the inner ring portion 162 of the vibration-damping ring 160 is stacked on the end of the bracket 141, and the fixed ring 165 is stacked on the outside of the inner ring portion 162. The fixed ring 165, inner ring portion 162, and bracket 141 are then connected so that the inner ring portion 162, made of elastic material, is securely fixed to the end of the bracket 141. When the speaker unit 140 vibrates during operation, the inner ring portion 162 vibrates along with the bracket 141, dissipating or weakening the vibration energy of the bracket 141 through the folded ring portion 163. The fixed ring 165 is made of a material with greater rigidity than the vibration-damping ring 160, such as plastic or metal. The fixed ring 165 can be in the form of a sheet, which takes up less space.

[0159] The fixing ring 165, the inner ring portion 162, and the bracket 141 can be connected by fasteners 166 (such as screws), snaps, etc., so that the inner ring portion 162 is securely fixed to the end of the bracket 141. When fasteners 166 are used for connection, the fasteners 166 are sequentially inserted through the fixing ring 165, the inner ring portion 162, and the bracket 141 to achieve a fixed connection between the fixing ring 165, the inner ring portion 162, and the bracket 141.

[0160] To enhance the low-frequency performance of the speaker module 100, in some embodiments, referring to Figures 12 and 13, a conduit 132 or opening 132a is provided on the wall of the box 130. Part of the inner wall of the first shell 110, the inner wall of the second shell 120, and the outer wall of the box 130 together form a second air cavity 113. The first air cavity 131 and the second air cavity 113 are connected via the conduit 132 or opening 132a. The part of the inner wall of the first shell 110 refers to the part of the side wall of the first shell 110 facing the second shell 120. The inner wall of the second shell 120 refers to the side wall of the second shell 120 facing the first shell 110. The outer wall of the box 130 refers to the side wall of the box 130 facing away from the first air cavity 131.

[0161] The box body 130 and the first shell 110 are combined to form a first air cavity 131. The first air cavity 131 and the second air cavity 113 are connected through a duct 132 or an opening 132a. The first air cavity 131 serves as a semi-open rear cavity of the speaker unit 140, thereby increasing the internal volume of the air cavity. The internal air of the first air cavity 131 and the second air cavity 113 can both be regarded as air springs. The larger the internal volume of the air cavity, the smaller the resistance of the air spring, the easier it is for the vibrating part of the speaker unit 140 to deform, and the smaller the impact on the resonant frequency of the speaker unit 140. By increasing the internal volume of the air cavity, the speaker module 100 can have better low-frequency diving performance and improve low-frequency sound effects. The number of ducts 132 or openings 132a can be one or more.

[0162] In order to improve the low-frequency diving performance of the speaker module 100 , in some embodiments, referring to FIG. 14 , the first air cavity 131 and the second air cavity 113 are connected via a conduit 132 or an opening, and the first shell 110 has a leakage hole 114 connected to the second air cavity 113 .

[0163] When speaker unit 140 operates at the system resonant frequency, the air inside duct 132 or the opening vibrates and emits sound waves. These sound waves then pass through second air cavity 113 and are emitted outward through leakage holes 114. The sound waves radiated outward by the air inside duct 132 or the opening and speaker unit 140 are in phase and superimposed on each other, increasing the sound pressure level of speaker module 100 at and near the system resonant frequency. This improves low-frequency radiation efficiency and enhances low-frequency penetration performance. There can be one or more leakage holes 114.

[0164] The air in conduit 132 or the opening can move freely. When speaker unit 140 operates at a low frequency, the air pressure in first air cavity 131 changes, causing the air in conduit 132 or the opening to flow in a directional manner. The air in conduit 132 or the opening can be considered a mass. The volume of air in first air cavity 131 is larger than the volume of air in conduit 132 or the opening. When speaker unit 140 operates at a low frequency, the air inside first air cavity 131 can be considered a spring. One end of the spring is connected to the vibrating portion of speaker unit 140, and the other end of the spring is connected to the mass corresponding to the air in conduit 132 or the opening, thereby forming a particle forced vibration system with a resonant frequency. The vibrating portion of speaker unit 140 is the source of forced vibration.

[0165] When the operating frequency of the speaker unit 140 is very low, the spring behaves as a rigid body, exhibiting no compression or tension deformation. The mass follows the spring's movement. The sound waves radiated outward from the mass through the second air cavity 113 and the sound waves radiated outward from the speaker unit 140 are in opposite phases and cancel each other out, resulting in a low output sound pressure level and low radiation efficiency. Referring to FIG15(a), when the vibrating portion of the speaker unit 140 moves outward (i.e., away from the first air cavity 131), the pressure within the first air cavity 131 decreases, and the mass follows the spring's movement inward (i.e., toward the first air cavity 131). Referring to FIG15(b), when the vibrating portion of the speaker unit 140 moves inward (i.e., toward the first air cavity 131), the pressure within the first air cavity 131 increases, and the mass follows the spring's movement outward (i.e., away from the first air cavity 131). The arrows in FIG15 indicate the movement directions of the vibrating portion of the speaker unit 140, the mass corresponding to the air within the conduit 132, and the air at the leak hole 114 at different locations.

[0166] When the operating frequency of speaker unit 140 approaches the resonant frequency of the aforementioned system, the system's amplitude increases dramatically. The amplitude of the mass becomes greater than the amplitude of the vibrating portion of speaker unit 140, causing the mass's acoustic phase to reverse. The duct 132 or opening 132a exerts a phase-reversing effect on the sound waves, causing the sound waves radiated outward from the mass through the second air cavity 113 and the leakage hole 114 to be in phase with the sound waves radiated outward from the speaker unit 140, resulting in superposition of the sound waves. This increases the output sound pressure level and improves radiation efficiency. Referring to FIG16(a), when the vibrating portion of speaker unit 140 moves outward (i.e., away from first air cavity 131), the mass also moves outward (i.e., away from first air cavity 131). Referring to FIG16(b), when the vibrating portion of speaker unit 140 moves inward (i.e., toward first air cavity 131), the mass also moves inward (i.e., toward first air cavity 131). The arrows in FIG. 16 represent the movement directions of the vibrating portion of the speaker unit 140 , the mass corresponding to the air inside the duct 132 , and the air at different positions at the leakage hole 114 .

[0167] The sound waves radiated outward from the mass block through the second air cavity 113 and the leakage hole 114 are in phase with the sound waves radiated outward from the speaker unit 140, which means that the phase difference between the sound waves radiated outward from the mass block and the speaker unit 140 is between -90° and 90°. The sound waves radiated outward from the mass block through the second air cavity 113 and the leakage hole 114 are in anti-phase with the sound waves radiated outward from the speaker unit 140, which means that the phase difference between the sound waves radiated outward from the mass block and the speaker unit 140 is between -180° and -90° or between 90° and 180°.

[0168] A particle forced vibration system is formed by combining the air inside the duct 132 (or opening) and the first air cavity 131. The speaker unit 140 operates at or near the system resonant frequency. The sound waves generated by the duct 132 or the opening pass through the second air cavity 113 and radiate outward from the leakage hole 114. The air inside the duct 132 or the opening and the sound waves radiated outward by the speaker unit 140 are in phase and superimposed on each other, thereby improving the sound pressure level of the speaker module 100 at or near the system resonant frequency, improving the low-frequency radiation efficiency, and improving the low-frequency diving performance of the speaker module 100.

[0169] When the first housing 110 includes a connected plate-shaped portion 111 and a frame-shaped portion 112, as shown in FIG14 , the leakage hole 114 can be provided on the plate-shaped portion 111; alternatively, as shown in FIG17 , the leakage hole 114 can be provided on the frame-shaped portion 112. When the speaker unit 140 operates at or near the system resonant frequency, both of these approaches can cause the air inside the conduit 132 or the opening to vibrate and emit sound waves, which then pass through the second air cavity 113 and are emitted outward through the leakage hole 114.

[0170] In addition, the leakage hole 114 of the first shell 110 can also serve as a heat dissipation hole, and air can flow in and out through the heat dissipation hole to achieve heat dissipation of internal components between the first shell 110 and the second shell 120.

[0171] Referring to Figures 12-14 , when designing the first air cavity 131 with the duct 132 or opening, after determining the internal volume of the first air cavity 131, the cross-sectional area S and length L of the duct 132 determine the system resonant frequency. If the product of the cross-sectional area S and length L of the duct 132 remains constant, the overall low-frequency radiation characteristics of the speaker module 100 remain unchanged.

[0172] First, determine the cross-sectional area S of the conduit 132, which satisfies the following formula:

[0173] S≥0.8*f b *V d

[0174] Where S is the cross-sectional area of ​​the conduit 132; f b is the system resonant frequency; V d It refers to the maximum displacement volume of the vibrating part of the speaker unit 140, that is, the product of the radiation area of ​​the vibrating part and the maximum linear displacement of the vibrating part.

[0175] The cross-sectional area S of the duct 132 may also be set to 10% to 40% of the effective radiation area of ​​the vibration portion of the speaker unit 140 .

[0176] Then determine the length L of the conduit 132 to satisfy the following formula:

[0177] c=f0*λ0

[0178] L<λ0 / 12

[0179] Wherein, c is the speed of sound, which can be taken as 344 m / s; f0 is the lowest resonant frequency of the speaker unit 140, which is measured when the speaker unit 140 is installed on an infinite baffle; L is the length of the duct 132; λ0 is the wavelength of the sound wave corresponding to the lowest resonant frequency f0 of the speaker unit 140.

[0180] Regarding the shape of the conduit 132 or opening 132a, referring to Figures 12 and 13, the cross-section of the conduit 132 or opening 132a can be circular, elliptical, rectangular, triangular, or the like. The conduit 132 can be configured as a straight tube, a curved tube, or other shapes. The specific shape is determined as needed. When the operating frequency of the speaker unit 140 is close to the system resonant frequency, the conduit 132 or opening 132a has a phase inversion effect on the sound waves.

[0181] When setting the position of the duct 132 or the opening 132a, referring to Figures 12 and 13, the duct 132 or the opening 132a is provided on one side or both sides of the box 130, so that the first air cavity 131 and the duct 132 (or the opening 132a) form a particle forced vibration system with a predetermined resonant frequency, so that the internal air of the duct 132 or the opening 132a participates in the low-frequency vibration, thereby improving the output sound pressure level of the speaker module 100 at the resonant frequency and improving the low-frequency diving performance.

[0182] When configuring the enclosure 130, referring to Figures 3, 7, 8, and 12, the enclosure 130 includes a plate portion 133 and a sidewall portion 134, which are connected to each other. The plate portion 133 is spaced apart from the second shell 120, and the sidewall portion 134 is connected to the first shell 110 on a side away from the plate portion 133. The enclosure 130, having the plate portion 133 and the sidewall portion 134, is easily molded. The enclosure 130 and the first shell 110 combine to form a first air cavity 131 of a predetermined volume. The first air cavity 131 serves as a rear cavity for the speaker unit 140, improving the low-frequency sound quality of the speaker module 100.

[0183] For example, the enclosure 130 is generally flat, box-shaped, and the plate-shaped portion 111 can be generally rectangular or have another shape. The sidewalls 134 are connected to the same side edge of the plate-shaped portion 111. The sidewalls 134 can be configured to be relatively small in the thickness direction of the enclosure 130, thereby reducing the thickness of the enclosure 130. The plate-shaped portion 111 can be configured to have a relatively large length and width, thereby providing a sufficient internal volume for the first air cavity 131 and enhancing the low-frequency sound quality of the speaker module 100.

[0184] When configuring the duct 132 or the opening 132a on the box body 130, referring to Figures 12 and 13, the duct 132 or the opening 132a can be set on the side wall portion 134 of the box body 130 to reduce the distance between the plate body portion 133 and the second shell 120, so that the thickness of the overall structure of the speaker module 100 is smaller, which is convenient for application in occasions with smaller thickness and space.

[0185] When the box body 130 is installed on the first shell 110 , in order to reduce the adverse effects of the working vibration of the speaker unit 140 , in some embodiments, referring to FIG. 7 to FIG. 9 , a second vibration damping member 170 extending along a predetermined route is sandwiched between the box body 130 and the first shell 110 .

[0186] When the speaker unit 140 is in operation, it generates vibration energy, which may be transmitted to the connection between the cabinet 130 and the first housing 110. The second vibration damping member 170 absorbs and buffers the vibration energy, thus weakening the vibration energy transmitted to the first housing 110. The second vibration damping member 170 can be made of an elastic material such as rubber or silicone.

[0187] The extension route of the second vibration damping member 170 can be set according to the shape of the connection position between the box body 130 and the first shell 110. In this way, a smaller second vibration damping member 170 can be configured without occupying too much space in the first shell 110, thereby achieving a vibration reduction effect.

[0188] For example, the sidewall 134 of the box body 130 is generally configured as a rectangle, and the second vibration damping member 170 is configured as a corresponding rectangle. The second vibration damping member 170 is sandwiched between the sidewall 134 of the box body 130 and the inner wall of the first shell 110 to achieve vibration reduction between the box body 130 and the first shell 110.

[0189] To position and assemble the second vibration-damping damping member 170 on the first housing 110, in some embodiments, referring to Figures 8 and 9 , the housing 130 has a mounting slot 1341. The extension path of the mounting slot 1341 is the same as the extension path of the second vibration-damping damping member 170, and the second vibration-damping damping member 170 is mounted in the mounting slot 1341. When assembling the second vibration-damping damping member 170 to the housing 130, the second vibration-damping damping member 170 can be quickly positioned in the mounting slot 1341 of the housing 130 without having to adjust the assembly position multiple times, thereby improving assembly efficiency.

[0190] Exemplarily, the side wall portion 134 of the box body 130 extends to form a third surrounding wall 1342, and the side wall portion 134 and the third surrounding wall 1342 form a mounting groove 1341. The annular second vibration-damping damping member 170 can be mounted outside the third surrounding wall 1342, and the inner circumferential surface of the second vibration-damping damping member 170 and the third surrounding wall 1342 are arranged relative to each other, thereby realizing rapid assembly of the second vibration-damping damping member 170.

[0191] In order to make the second vibration damping member 170 have a larger deformation to enhance the vibration reduction effect, in some embodiments, referring to Figures 8, 9, and 18, the second vibration damping member 170 has a second hollow inner cavity 171 therein, and the extension route of the second hollow inner cavity 171 is the same as the extension route of the second vibration damping member 170.

[0192] Second vibration damping member 170, equipped with a second hollow interior cavity 171, forms a spring-like structure. It experiences significant deformation when compressed, but returns to its unstressed configuration when the external force is removed. The greater the deformation of second vibration damping member 170, the more vibration energy it can absorb, resulting in a better vibration damping effect, minimizing the adverse effects of high-power vibration on speaker unit 140.

[0193] For example, the second vibration-damping damping member 170 extends in a generally rectangular shape, and the second hollow inner cavity 171 extends in a generally rectangular shape. Such a structure is easy to form.

[0194] When the second hollow cavity 171 is provided, the cross section of the second hollow cavity 171 is circular, elliptical, rectangular, triangular or other shapes. The second hollow cavity 171 structures of these shapes are easy to form, so that the second vibration damping member 170 has a large deformation amount to enhance the vibration reduction effect.

[0195] In order to make the second vibration-damping damping member 170 have a larger deformation to enhance the vibration-damping effect, in some embodiments, referring to Figures 9 and 18, the second vibration-damping damping member 170 includes a plurality of second annular portions 172 stacked and connected along the axial direction 140c of the speaker unit 140, and a second annular groove 173 is formed on the side of the connection between two adjacent second annular portions 172.

[0196] When the working vibration of the speaker unit 140 is transmitted to the second vibration-damping damping member 170, each second annular portion 172 in the second vibration-damping damping member 170 is compressed and deformed, and the side surface of the connection between the two adjacent second annular portions 172 has a second annular groove 173, so that the side area of ​​the two adjacent second annular portions 172 has a large deformation displacement. When the external force is removed, each second annular portion 172 quickly returns to an unstressed state, and the second vibration-damping damping member 170 as a whole has a large deformation amount, thereby improving the vibration reduction effect.

[0197] Exemplarily, the inner and outer circumferential surfaces of each second annular portion 172 are both convex arc surfaces or convex surfaces of other shapes, thereby forming second annular grooves 173 on the inner and outer surfaces of the connection between two adjacent second annular portions 172, so that each second annular portion 172 has a larger deformation when under pressure.

[0198] In order to improve the low-frequency diving performance of the speaker module 100, in some embodiments, referring to Figures 4, 5, 8, and 19, the first shell 110 has a third through hole 1114 corresponding to the box body 130, and the third through hole 1114 is connected to the first air cavity 131. A first passive vibration plate 180 is provided at the third through hole 1114, and the edge of the first passive vibration plate 180 is connected to the first shell 110.

[0199] The passive vibration plate can be called a passive vibration membrane or a passive radiator (PR). The first air cavity 131 and the third through hole 1114 are connected when the first passive vibration plate 180 is not installed at the third through hole 1114.

[0200] The first passive vibration plate 180 does not need to be driven by an electrical signal when working. The vibration part of the speaker unit 140 vibrates when working, causing the internal pressure of the first air cavity 131 to change. The air inside the first air cavity 131 drives the first passive vibration plate 180 to vibrate and emit sound outward.

[0201] The first passive vibration plate 180 can be considered a mass, and the air within the first air cavity 131 can be considered a spring when the speaker unit 140 operates at a low frequency. One end of the spring is connected to the vibrating portion of the speaker unit 140, and the other end is connected to the mass corresponding to the first passive vibration plate 180, thereby forming a point-mass forced vibration system with a resonant frequency. The vibrating portion of the speaker unit 140 is the source of forced vibration.

[0202] When the operating frequency of the speaker unit 140 is very low, the above-mentioned spring behaves as a rigid body without compression and tension deformation. The mass block moves with the spring, and the sound waves radiated outward by the mass block and the speaker unit 140 are in opposite phases and cancel each other out. The output sound pressure level is low and the radiation efficiency is low.

[0203] When the operating frequency of the speaker unit 140 is close to the above-mentioned system resonant frequency, the amplitude of the system increases dramatically, and the amplitude of the mass block is larger than the amplitude of the vibrating part of the speaker unit 140, so that the acoustic phase of the mass block is reversed, and the sound waves radiated outward by the mass block and the speaker unit 140 are in phase and superimposed on each other, the output sound pressure level increases, and the radiation efficiency is higher.

[0204] Through the particle forced vibration system formed by the combination of the first passive vibration plate 180 and the air inside the first air cavity 131, the speaker unit 140 operates at and near the system resonant frequency. The sound waves radiated outward by the first passive vibration plate 180 and the speaker unit 140 are in phase and superimposed on each other, thereby improving the sound pressure level of the speaker module 100 at and near the system resonant frequency, improving the low-frequency radiation efficiency, and improving the low-frequency diving performance of the speaker module 100.

[0205] When setting the shape of the first passive vibration plate 180 , the shape of the first passive vibration plate 180 matches the shape of the third through hole 1114 , so that the first passive vibration plate 180 covers the third through hole 1114 of the first shell 110 .

[0206] For example, the third via hole 1114 is circular, and the first passive vibration plate 180 is circular, so that the first passive vibration plate 180 covers the third via hole 1114. In addition, the third via hole 1114 and the first passive vibration plate 180 can also be rounded rectangles or other shapes.

[0207] When setting up the first passive vibration plate 180, referring to Figures 8 and 19, the first passive vibration plate 180 includes a plate member 181 and a folded ring member 182. The plate member 181 is connected to the inner edge of the folded ring member 182, and the outer edge of the folded ring member 182 is connected to the wall surface of the third through hole 1114 of the first shell 110. The plate member 181 can be made of plastic, metal, or other materials. The folded ring member 182 can be made of an elastic material such as rubber.

[0208] When connecting the first passive vibration plate 180 and the first shell 110, referring to Figures 8 and 19 , a third vibration damping member 183 may be disposed between the first passive vibration plate 180 and the wall of the first shell 110 to reduce the vibration energy transmitted to the first shell 110 during vibration of the first passive vibration plate 180, thereby achieving a vibration reduction effect. The structure of the third vibration damping member 183 can be configured similarly to that of the first vibration damping member 150.

[0209] When the first through hole 1111 and the third through hole 1114 are provided on the first shell 110, referring to Figures 4 and 5, the first through hole 1111 and the third through hole 1114 can be provided adjacent to each other, with the speaker unit 140 provided at the first through hole 1111 and the first passive vibration plate 180 provided at the third through hole 1114. This allows the speaker unit 140 to vibrate and produce sound when in operation. The operating vibration of the speaker unit 140 causes the air inside the first air cavity 131 to vibrate, driving the first passive vibration plate 180 to vibrate and produce sound, thereby improving the low-frequency diving performance of the speaker module 100. The speaker unit 140 and the first passive vibration plate 180 are provided adjacent to each other, creating a better appearance.

[0210] To enhance the low-frequency performance of the speaker module 100, in some embodiments, referring to Figures 8, 17, and 19, the first housing 110 has a leakage hole 114 communicating with the second air cavity 113; the cabinet 130 has a fourth through hole 1333, which communicates with the first air cavity 131. A second passive vibration plate 190 is disposed at the fourth through hole 1333, and the edge of the second passive vibration plate 190 is connected to the cabinet 130. The first air cavity 131 and the fourth through hole 1333 are connected when the second passive vibration plate 190 is not installed at the fourth through hole 1333.

[0211] The second passive vibration plate 190 does not require an electrical signal to drive it during operation. The vibration of the vibrating portion of the speaker unit 140 during operation causes the internal pressure of the first air cavity 131 to change, and the air inside the first air cavity 131 drives the second passive vibration plate 190 to vibrate. Similar to the particle forced vibration system formed by the first passive vibration plate 180 and the air inside the first air cavity 131, the second passive vibration plate 190 and the air inside the first air cavity 131 form a particle forced vibration system. The speaker unit 140 operates at or near the resonant frequency of the system. The sound waves generated by the second passive vibration plate 190 pass through the second air cavity 113 and radiate outward from the leakage hole 114. The sound waves radiated outward by the second passive vibration plate 190 and the speaker unit 140 are in phase and superimposed on each other, thereby increasing the sound pressure level of the speaker module 100 at or near the resonant frequency, improving the low-frequency radiation efficiency, and improving the low-frequency diving performance of the speaker module 100.

[0212] For example, the third through hole 1114 of the first shell 110 and the fourth through hole 1333 of the box body 130 are arranged relative to each other, and the first passive vibration plate 180 is arranged at the third through hole 1114, and the second passive vibration plate 190 is arranged at the fourth through hole 1333, which is beneficial to the vibration of the vibration part of the speaker unit 140. The air inside the first air cavity 131 drives the first passive vibration plate 180 and the second passive vibration plate 190 to vibrate, thereby improving the low-frequency diving performance of the speaker module 100.

[0213] When connecting the second passive vibration plate 190 and the housing 130, referring to Figures 8 and 19 , a fourth vibration damping member 191 may be disposed between the second passive vibration plate 190 and the wall of the housing 130. This member is used to reduce the vibration energy transmitted to the housing 130 during vibration of the second passive vibration plate 190, thereby achieving a vibration reduction effect. The structure of the fourth vibration damping member 191 may be similar to that of the first vibration damping member 150.

[0214] In some embodiments, referring to Figures 20 to 23 , the housing 130 and the first housing 110 are integrally molded. This integral structure, formed by integral molding, defines a first air cavity 131. During assembly, the speaker unit 140 can be directly mounted on the first through-hole 1111 of the first housing 110, resulting in efficient assembly. The housing 130 and the first housing 110 can be made of the same or different materials.

[0215] Alternatively, the box body 130 is made of plastic, a portion of the first shell 110 is made of plastic and another portion is made of metal, and the first shell 110 and the box body 130 can be formed by insert injection molding.

[0216] When the box body 130 and the first shell 110 are an integrated structure, the bracket 141 of the speaker unit 140 is fixed on the first shell 110, and a first vibration damping member 150 extending along a predetermined route is sandwiched between the bracket 141 and the first shell 110 to reduce the adverse effects of the working vibration of the speaker unit 140.

[0217] In order to position and assemble the first vibration-damping damping member 150 on the first shell 110, in some embodiments, referring to Figures 22 and 24, the outer side surface of the first shell 110 is provided with a first annular positioning groove 1112 that is connected to the first through hole 1111, and the annular first vibration-damping damping member 150 is arranged in the first positioning groove 1112, so as to realize the rapid assembly of the first vibration-damping damping member 150.

[0218] To verify the superiority of the speaker module 100 according to the embodiment of the present application, frequency response simulation tests were performed on the related art speaker module 10 shown in FIG1 , the speaker module 100 according to the embodiment of the present application having a larger air cavity as shown in FIG3 , and the speaker module 100 according to the embodiment of the present application having a larger air cavity and a conduit 132 as shown in FIG12 . The frequency response test was conducted by inputting a 1-watt (W) sinusoidal signal into the speaker module and measuring the sound pressure level at a distance of 1 meter (m) from the speaker module, thereby obtaining a frequency response curve.

[0219] The related art speaker module and the two speaker modules 100 of the present application embodiment use speakers of the same type and size (such as dynamic speakers), and the air cavity volume of the two speaker modules 100 of the present application embodiment is greater than the air cavity volume of the related art speaker module 10.

[0220] After frequency response testing, as shown in Figure 25, the low-frequency dive of the related art speaker module is 60Hz, the low-frequency dive of the speaker module 100 with a larger air cavity volume in the embodiment of the present application is 50Hz, and the low-frequency dive of the speaker module 100 with a larger air cavity volume and a conduit 132 in the embodiment of the present application is 40Hz. It can be seen that both speaker modules 100 in the embodiment of the present application have good low-frequency sound effects and improved low-frequency dive performance. Among them, the speaker module 100 with a larger air cavity volume and a conduit 132 in the embodiment of the present application has better low-frequency sound effects.

[0221] 26 , an embodiment of the present application provides a device 1000 including the above-mentioned speaker module 100. The device 1000 may be a display, a laptop, an all-in-one computer, a smart screen, a television, a car audio device, and the like.

[0222] The device 1000 provided in the embodiments of the present application utilizes the aforementioned speaker module 100, reducing the vibration-damping gap between the cabinet and the first shell, as well as the individual wall thickness of the cabinet, in speaker modules of the related art. This reduces the overall thickness of the speaker module 100, allowing the thickness of the entire device 1000 to be reduced while maintaining the thickness of the speaker unit 140. When the thickness of the speaker module 100 is reduced, the reduced thickness can be utilized to configure the larger first air cavity 131, thereby enabling the speaker module 100 to achieve better audio performance.

[0223] In some embodiments, referring to Figures 4 and 5, the first shell 110 is a rear shell, the second shell 120 is a back plate, and the rear shell includes a plate-like portion 111 and a frame-like portion 112 connected to each other. The plate-like portion 111 and the back plate are spaced apart, and the frame-like portion 112 is connected to the back plate. The plate-like portion 111 of the rear shell can be understood as the large surface of the rear shell, and the frame-like portion 112 is used to realize the connection between the plate-like portion 111 and the back plate, so that the plate-like portion 111 and the back plate are spaced apart. The plate-like portion 111 and the frame-like portion 112 of the rear shell can be an integrally formed structure, and the frame-like portion 112 and the back plate can be connected by fasteners, snaps or other methods.

[0224] In some embodiments, the first through hole 1111 may be provided in the plate-shaped portion 111 , the axis of the speaker unit 140 is perpendicular to the plate-shaped portion 111 , and the speaker unit 140 is provided at the first through hole 1111 to emit sound to the outside of the plate-shaped portion 111 .

[0225] In some embodiments, the first through hole 1111 may be provided in the frame portion 112 , the axis of the speaker unit 140 is perpendicular to the frame portion 112 , and the speaker unit 140 is provided at the first through hole 1111 to emit sound to the outside of the frame portion 112 .

[0226] 26 , a screen assembly 200 is further included, which is disposed on the side of the second housing 120 facing away from the first housing 110. The screen assembly 200 is used to display image information and play sound through the speaker module 100, forming a display device 1000 with sound playback function.

[0227] In some embodiments, as shown in FIG3 , speaker module 100 is used in automotive audio equipment. First housing 110 serves as the top housing, second housing 120 serves as the bottom housing, and speaker unit 140 is positioned above the top housing to output sound outward. This reduces the overall thickness of speaker module 100 and allows for compact automotive applications. The thickness of speaker unit 140 remains constant, allowing for superior audio performance.

[0228] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. 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, a cabinet and a speaker unit; The first shell has a first via hole; The box body is connected to the first shell, the box body and the first shell together form a first air cavity, and the first air cavity is connected to the first via hole; The speaker unit is disposed in the first air cavity, the speaker unit is connected to the first shell, and the sound output side of the speaker unit is located at the first through hole; The first shell and the second shell are connected, the box body is located in an inner cavity surrounded by the first shell and the second shell, and a gap is formed between the box body and the second shell.

2. The speaker module according to claim 1, characterized in that: The box body is mounted on the first shell; Alternatively, the box body and the first shell are an integrally formed structure.

3. The speaker module according to claim 1 or 2, characterized in that: The bracket of the speaker unit is fixed on the first shell, and a first vibration-reducing damping member extending along a predetermined route is sandwiched between the bracket and the first shell.

4. The speaker module according to claim 3, characterized in that: The first shell has a first positioning groove corresponding to the first through hole, and one end of the first vibration damping member is installed in the first positioning groove; And / or, when the box body is installed on the first shell, the bracket has a second positioning groove, and one end of the first vibration-absorbing damping member is installed at the second positioning groove.

5. The speaker module according to claim 3 or 4, characterized in that: The first vibration-damping damping member has a first hollow inner cavity therein, and an extension route of the first hollow inner cavity is the same as an extension route of the first vibration-damping damping member.

6. The speaker module according to claim 5, characterized in that: The cross section of the first hollow inner cavity is circular, elliptical, rectangular or triangular.

7. The speaker module according to any one of claims 3 to 6, characterized in that: The first vibration-absorbing damping member includes a plurality of first annular portions stacked and connected along the axial direction of the speaker unit, and a first annular groove is formed on a side surface of a connection between two adjacent first annular portions.

8. The speaker module according to any one of claims 1 to 7, characterized in that: The box body has a second through hole corresponding to the speaker unit, and the bracket of the speaker unit is connected to the second through hole through a vibration-damping ring. The vibration-damping ring includes an outer ring portion and an inner ring portion that are connected to each other. The outer ring portion is located at the outer periphery of the inner ring portion, the outer ring portion is fixed to the box body, and the inner ring portion is fixed to one end of the bracket facing the second shell, and the inner ring portion and the second shell are arranged facing each other.

9. The speaker module according to claim 8, characterized in that: The outer ring portion and the inner ring portion are connected via a bent and extended folded ring portion, and the folded ring portion and the second via hole are arranged correspondingly.

10. The speaker module according to claim 8 or 9, characterized in that: The outer ring portion is fixed on the inner wall of the box body; And / or, the inner wall of the box body has a limiting groove, the shape of the limiting groove is matched with the shape of the outer ring part, and the outer ring part is arranged at the limiting groove; And / or, a fixing ring is provided on the inner ring portion, the inner ring portion is located between the bracket and the fixing ring, and the fixing ring, the inner ring portion and the bracket are connected.

11. The loudspeaker module according to any one of claims 1 to 10, characterized in that: The wall surface of the box body is provided with a conduit or an opening, and a part of the inner wall of the first shell, the inner wall of the second shell and the outer wall of the box body together form a second air cavity, and the first air cavity and the second air cavity are connected through the conduit or the opening.

12. The speaker module according to claim 11, characterized in that: The first shell has a leakage hole communicating with the second air cavity; and / or, the cross-section of the conduit or the opening is circular, elliptical, rectangular or triangular; And / or, the casing has the conduit or the opening on one side or both sides.

13. The loudspeaker module according to any one of claims 1 to 12, characterized in that: The box body comprises a plate body portion and a side wall portion connected to each other. The plate body portion and the second shell are spaced apart, and a side of the side wall portion away from the plate body portion is connected to the first shell.

14. The loudspeaker module according to any one of claims 1 to 13, characterized in that: When the box body is mounted on the first shell, a second vibration-reducing damping member extending along a predetermined route is sandwiched between the box body and the first shell.

15. The speaker module according to claim 14, characterized in that: The box body has a mounting groove, the extension route of the mounting groove is the same as the extension route of the second vibration damping member, and the second vibration damping member is installed at the mounting groove; And / or, the second vibration damping member has a second hollow inner cavity therein, and the extension route of the second hollow inner cavity is the same as the extension route of the second vibration damping member; And / or, the second vibration-absorbing damping member includes a plurality of second annular portions stacked and connected along the axial direction of the speaker unit, and a second annular groove is formed on a side surface of a connection between two adjacent second annular portions.

16. The loudspeaker module according to any one of claims 1 to 15, characterized in that: The first shell has a third through hole at a position corresponding to the box body, the third through hole is connected to the first air cavity, a first passive vibration plate is provided at the third through hole, and an edge of the first passive vibration plate is connected to the first shell; and / or, the first shell has a leakage hole communicating with the second air cavity; The box body has a fourth through hole, the fourth through hole is communicated with the first air cavity, a second passive vibration plate is arranged at the fourth through hole, and an edge of the second passive vibration plate is connected to the box body.

17. A device, characterized in that Comprising a speaker module as described in any one of claims 1 to 16.

18. The device according to claim 17, characterized in that The first shell is a rear shell, the second shell is a back plate, the rear shell includes a plate-shaped portion and a frame-shaped portion connected to each other, the plate-shaped portion and the back plate are spaced apart, and the frame-shaped portion is connected to the back plate.

19. The device according to claim 17 or 18, characterized in that It also includes a screen assembly, which is arranged on a side of the second shell facing away from the first shell.

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