Speaker with air conduction and bone conduction

Abstract

The application discloses a loudspeaker with air conduction and bone conduction, which comprises a shell, a diaphragm group, a vibrating sheet, a magnet, a coil and an upper cover; the upper cover is arranged at the opening of the shell to form a containing cavity with the shell; the diaphragm group, the vibrating sheet, the magnet and the coil are arranged in the containing cavity; the diaphragm group is connected with the shell; the vibrating sheet is arranged on the side of the diaphragm group away from the bottom of the shell; the vibrating sheet is connected with the shell; a second cavity is formed between the vibrating sheet and the diaphragm group; the magnet is arranged on the side of the vibrating sheet away from the diaphragm group; one end of the coil is connected to the side of the upper cover facing the magnet, and the other end of the coil is arranged around the magnet; thus, the loudspeaker has the functions of bone conduction and air conduction, realizes double-unit sound transmission design, makes up the problem of insufficient bass in the process of sound transmission of bone conduction, increases the power of the loudspeaker, reduces full-frequency distortion and is better in sound quality.

Description

Technical Field

[0001] This invention relates to the field of generating devices, and in particular to a loudspeaker that combines air conduction and bone conduction. Background Technology

[0002] A loudspeaker is a transducer that converts electrical signals into sound signals. Common sound conduction methods include air conduction and bone conduction. Air conduction generates sound through diaphragm vibration, which is then transmitted to the user's ear via the air. Bone conduction utilizes the skull, bony labyrinth, inner ear fluid, cochlea, and auditory center to transmit sound waves. Existing bone conduction loudspeakers, when the user is in a noisy environment or during strenuous exercise, such as jogging, rely solely on bone conduction. Limited by the thickness of the bone conduction diaphragm and its rigid sound generation method, they often suffer from insufficient bass. Existing air conduction loudspeakers typically include a bracket, a U-cup mounted on the bracket, and a diaphragm. A magnet and washer are installed in the U-cup, forming a magnetic gap. A voice coil is mounted on the diaphragm, extending into the magnetic gap. A circuit board is electrically connected to the voice coil via wires, causing the voice coil to vibrate the diaphragm and produce sound. However, the use of a circuit board and wires to electrically connect to the voice coil results in lower loudspeaker power, higher full-frequency distortion, and poorer sound quality.

[0003] Therefore, a new technology needs to be developed to solve the above problems. Summary of the Invention

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a loudspeaker that combines air conduction and bone conduction. It integrates bone conduction and air conduction functions, realizes a dual-unit sound transmission design, makes up for the problem of insufficient bass in bone conduction during sound transmission, increases the power of the loudspeaker, reduces full-frequency distortion, and improves sound quality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A loudspeaker combining air conduction and bone conduction includes a housing, a diaphragm assembly, a vibrating plate, a magnet, a coil, and a top cover. The top cover is disposed at the opening of the housing to form a receiving cavity with the housing. The diaphragm assembly, vibrating plate, magnet, and coil are all disposed within the receiving cavity. The diaphragm assembly is connected to the housing. The side of the diaphragm assembly facing the bottom of the housing is spaced apart from the inner bottom of the housing to form a first cavity. A gasket is disposed at the inner bottom of the housing, the gasket abutting against the inner bottom of the housing, and the side of the diaphragm assembly facing the bottom of the housing abutting against the side of the gasket away from the inner bottom of the housing.

[0007] The vibrating plate is disposed on the side of the diaphragm assembly away from the bottom of the outer shell, and the vibrating plate is connected to the outer shell; a second cavity is formed between the vibrating plate and the diaphragm assembly; a spacer portion is provided on the side of the diaphragm assembly away from the bottom of the outer shell to separate the vibrating plate and the diaphragm assembly, and the side of the vibrating plate facing the diaphragm assembly abuts against the side of the spacer portion away from the diaphragm assembly.

[0008] The magnet is positioned on the side of the vibrating plate away from the diaphragm assembly; one end of the coil is connected to the side of the upper cover facing the magnet, and the other end is surrounding the magnet.

[0009] As a preferred embodiment, the diaphragm assembly includes a diaphragm and a diaphragm ring connected to the diaphragm. The diaphragm ring extends circumferentially to form the spacer portion. The diaphragm ring is connected to the periphery of the diaphragm on the side away from the bottom of the housing. The periphery of the vibrating plate facing the diaphragm assembly abuts against the side of the diaphragm ring away from the diaphragm.

[0010] As a preferred embodiment, the spacer portion is a first diaphragm ring, which abuts against the periphery of the diaphragm assembly on the side away from the bottom of the housing, and the periphery of the vibrating plate facing the diaphragm assembly abuts against the side of the first diaphragm ring away from the diaphragm assembly.

[0011] As a preferred embodiment, the diaphragm assembly includes a diaphragm and a second diaphragm ring, the second diaphragm ring being connected to the periphery of the diaphragm on the side away from the bottom of the housing, the first diaphragm ring abutting against the side of the second diaphragm ring away from the diaphragm, and the surface of the diaphragm facing the bottom of the housing having a coating.

[0012] As a preferred embodiment, a support base is provided inside the receiving cavity. The support base is connected to the outer shell on all four sides. The side of the support base facing the bottom of the outer shell abuts against the periphery of the vibrating plate on the side away from the bottom of the outer shell. The side of the upper cover facing the magnet abuts against the side of the support base away from the vibrating plate. The coil is spaced apart from the support base.

[0013] As a preferred embodiment, a support is also provided inside the receiving cavity; the support is disposed between the vibrating plate and the magnet to accommodate the magnet; the outer peripheral wall of the support is spaced apart from the inner peripheral wall of the support base, and the other end of the coil extends into the support and is spaced apart from the inner peripheral wall of the support.

[0014] As a preferred embodiment, the support includes a first cylindrical portion and a second cylindrical portion; one end of the first cylindrical portion extends outward to form a connecting portion; the connecting portion is connected to one end of the second cylindrical portion, and the space formed by the first cylindrical portion and the second cylindrical portion is interconnected; the inner diameter of the first cylindrical portion is smaller than the inner diameter of the second cylindrical portion; the magnet portion is housed in the first cylindrical portion and extends into the second cylindrical portion, with a distance between it and the inner peripheral wall of the second cylindrical portion; the other end of the coil extends into the second cylindrical portion and is also spaced between it and the inner peripheral wall of the second cylindrical portion; the side of the first cylindrical portion away from the magnet abuts against the side of the vibrating plate away from the diaphragm assembly, and a gap is formed between the connecting portion and the vibrating plate.

[0015] As a preferred embodiment, the top cover is a circuit board, the circuit board is provided with a first through hole communicating with the receiving cavity, and a first tuning component is covered on the outside of the first through hole on the circuit board.

[0016] As a preferred embodiment, the bottom of the housing is provided with a second through hole communicating with the receiving cavity, and the outer side of the second through hole is covered by a second tuning element on the housing.

[0017] As a preferred embodiment, the vibrating plate includes a main body with a plurality of annular grooves arranged alternately around the center of the main body. Each annular groove has a head end, a tail end, and a bend, the bend being located between the corresponding head end and tail end. The head end of each annular groove extends to the outside of the bend of the adjacent previous annular groove, and the tail end of each annular groove extends to the inside of the bend of the adjacent next annular groove.

[0018] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly uses a design combining a vibrating plate with a diaphragm assembly, and a design combining a magnet and a coil to add an air conduction structure, thus combining bone conduction and air conduction functions and realizing a dual-unit sound transmission design. In this way, by receiving a signal, the coil and magnet can generate a magnetic field signal, causing the magnet to vibrate, which in turn drives the vibrating plate to vibrate, realizing bone conduction sound generation. As the magnet and vibrating plate move up and down, the internal air is compressed, and the air pushes the diaphragm assembly to generate sound. Combined with the first and second through holes, air conduction sound generation is realized. Moreover, the sound generated by the diaphragm assembly can compensate for the lack of bass in the sound generated by the vibrating plate, thereby compensating for the lack of bass in bone conduction during sound transmission, increasing the power of the speaker, reducing full-frequency distortion, and improving sound quality. At the same time, the diaphragm assembly can buffer the sound from bone conduction, achieving the purpose of shock absorption, thereby reducing the bone conduction vibration experienced by the wearer and making it more comfortable to wear.

[0019] Furthermore, by forming a first cavity between the diaphragm assembly and the inner bottom of the housing, and forming a second cavity between the diaphragm and the diaphragm assembly, the axial space of the cavity inside the entire loudspeaker can be lengthened, thereby allowing the magnet to vibrate more vertically and increasing power.

[0020] To more clearly illustrate the structural features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of the present invention;

[0022] Figure 2 This is a three-dimensional schematic diagram of the overall structure from another angle of Embodiment 1 of the present invention;

[0023] Figure 3 This is an exploded view of Embodiment 1 of the present invention;

[0024] Figure 4 This is another exploded view of Embodiment 1 of the present invention;

[0025] Figure 5 This is a cross-sectional view of Embodiment 1 of the present invention;

[0026] Figure 6 This is a test frequency response curve of a bone conduction loudspeaker using existing technology;

[0027] Figure 7 This is a test frequency response curve of an existing air-conducting loudspeaker.

[0028] Figure 8 This is a test frequency response curve diagram of Embodiment 1 of the present invention;

[0029] Figure 9 This is a cross-sectional view of Embodiment 2 of the present invention;

[0030] Figure 10 This is a cross-sectional view of Embodiment 3 of the present invention.

[0031] Explanation of reference numerals in the attached diagram:

[0032] 10. Outer shell; 11. Second through hole

[0033] 12. Second tuning component; 20. Diaphragm assembly

[0034] 21. Membrane sheet 22. Second membrane ring

[0035] 23. Coating; 30. Vibrating plate

[0036] 31. Main body 32. Annular groove

[0037] 33. Bending section; 40. Magnet

[0038] 50, coil 60, top cover

[0039] 61. First through hole; 62. First tuning component

[0040] 63, Notch 70, Washer ring

[0041] 80. First membrane ring; 90. Support seat

[0042] 101, Support 1011, First Cylindrical Section

[0043] 1012, Second cylindrical section; 1013, Connecting section

[0044] 102. Receiving cavity; 103. Membrane ring. Detailed Implementation

[0045] Please refer to Figures 1 to 10 As shown, it illustrates the specific structures of three embodiments of the present invention.

[0046] like Figures 1 to 5 As shown in Embodiment 1: A loudspeaker combining air conduction and bone conduction includes a housing 10, a diaphragm assembly 20, a vibrating plate 30, a magnet 40, a coil 50, a support base 90, a bracket 101, and a top cover 60. The top cover 60 covers the opening of the housing 10 to form a receiving cavity 102 with the housing 10. The periphery of one end of the opening of the housing 10 is bent inward to form a limiting part, and the limiting part abuts against the side of the top cover 60 away from the receiving cavity 102, so that the housing 10 and the top cover 60 are riveted and sealed. The housing 10 is a metal housing 10, and the material of the housing 10 is aluminum, aluminum alloy, copper, or zinc white copper. Of course, the housing 10 can also be made of other materials.

[0047] like Figures 1 to 5As shown in Embodiment 1: the diaphragm assembly 20, vibrating plate 30, magnet 40, coil 50, support base 90, and bracket 101 are all disposed within the receiving cavity 102. The diaphragm assembly 20 is connected to the outer shell 10. The side of the diaphragm assembly 20 facing the bottom of the outer shell 10 is spaced apart from the inner bottom of the outer shell 10 to form a first cavity. The vibrating plate 30 is disposed on the side of the diaphragm assembly 20 away from the bottom of the outer shell 10, and the vibrating plate 30 is connected to the outer shell 10. The vibrating plate 30 and the diaphragm assembly 20... The spacing is set so that a second cavity is formed between the vibrating plate 30 and the diaphragm assembly 20; the diaphragm assembly 20 is provided with a spacing portion on the side away from the bottom of the outer shell 10 for separating the vibrating plate 30 and the diaphragm assembly 20, and the side of the vibrating plate 30 facing the diaphragm assembly 20 abuts against the side of the spacing portion away from the diaphragm assembly 20; the magnet 40 is provided on the side of the vibrating plate 30 away from the diaphragm assembly 20; one end of the coil 50 is connected to the side of the upper cover 60 facing the magnet 40, and the other end is surrounded around the magnet 40. Here, the design of the vibrating plate 30 combined with the diaphragm assembly 20, along with the design of the magnet 40 and coil 50, adds an air conduction structure, thus combining bone conduction and air conduction functions and realizing a dual-unit sound transmission design. In this way, by receiving a signal, the coil and magnet generate a magnetic field signal, causing the magnet to vibrate, which in turn drives the vibrating plate to vibrate, achieving bone conduction sound generation. Simultaneously, the up-and-down movement of the magnet and vibrating plate compresses the internal air, which in turn drives the diaphragm assembly to produce sound. Combined with the first and second through holes described below, air conduction sound generation is achieved, and the sound generated by the diaphragm assembly can compensate for the sound generated by the vibrating plate. This design addresses the lack of bass in bone conduction, compensating for the insufficient bass response during sound transmission. It also increases speaker power, reduces full-range distortion, and improves sound quality. Furthermore, the diaphragm assembly buffers the sound from bone conduction, reducing vibration and making the wearer more comfortable. Additionally, by creating a first cavity between the diaphragm assembly and the inner bottom of the outer shell, and a second cavity between the diaphragm and the vibrating plate, the axial space within the speaker's internal cavity is lengthened, allowing for greater vertical vibration of the magnet and increased power.

[0048] like Figure 1 , Figure 3 , Figure 4As shown in Embodiment 1: the upper cover 60 is a circuit board, which has a first through hole 61 communicating with the receiving cavity 102. A first tuning component 62 covers the outer side of the first through hole 61 on the circuit board. Here, the circuit board can be a printed circuit board, and a filter circuit can be provided on the outer surface of the printed circuit board to filter out noise generated during the speaker's operation, improving the clarity and sound quality of the sound delivered by the speaker, thereby enhancing the user experience. Furthermore, the circuit board also has a notch 63, which accommodates the end of the lead wire of the coil 50. The notch 63 can be sealed by filling with sealant or by providing a waterproof membrane. The first tuning component 62 is preferably designed to be circular, but it can also be designed in other shapes. The first tuning component 62 can be sound-absorbing paper, tuning mesh, tuning wire mesh, or other materials; the design can be selected based on actual production needs.

[0049] like Figure 3 , Figure 4 , Figure 5 As shown in Embodiment 1: the bottom of the outer shell 10 is provided with a second through hole 11 communicating with the receiving cavity 102, and a second tuning element 12 covers the outer side of the second through hole 11 on the outer shell 10. The second tuning element 12 is preferably designed to be circular, but it can also be designed in other shapes. The second tuning element 12 can be sound-absorbing paper, tuning mesh, tuning wire mesh, or other materials; the design can be selected according to actual production needs. Thus, the combined design of the first through hole 61, the second through hole 11, and the first tuning element 62 and the second tuning element 12 facilitates tuning.

[0050] like Figure 3 , Figure 4 , Figure 5As shown in Embodiment 1: the support base 90 is connected to the outer shell 10 on all four sides. The side of the support base 90 facing the bottom of the outer shell 10 abuts against the periphery of the vibrating plate 30 away from the bottom of the outer shell 10. The side of the upper cover 60 facing the magnet 40 abuts against the side of the support base 90 away from the vibrating plate 30. The coil 50 is spaced apart from the support base 90. The bracket 101 is disposed between the vibrating plate 30 and the magnet 40 to accommodate the magnet 40. The outer peripheral wall of the bracket 101 is spaced apart from the inner peripheral wall of the support base 90. The other end of the coil 50 extends into the bracket 101 and is spaced apart from the inner peripheral wall of the bracket 101. In this embodiment, the support 101 includes a first cylindrical portion 1011 and a second cylindrical portion 1012. Both the first cylindrical portion 1011 and the second cylindrical portion 1012 are cylindrical. Of course, the first cylindrical portion 1011 and the second cylindrical portion 1012 can also be other shapes, as long as they are set according to actual production needs. The periphery of one end of the first cylindrical portion 1011 extends outward to form a connecting portion 1013. The connecting portion 1013 is connected to one end of the second cylindrical portion 1012, and the space formed by the first cylindrical portion 1011 and the second cylindrical portion 1012 is closed. The two cylindrical portions are interconnected, and the inner diameter of the first cylindrical portion 1011 is smaller than the inner diameter of the second cylindrical portion 1012. The magnet 40 is partially housed in the first cylindrical portion 1011 and extends toward the second cylindrical portion 1012, with a distance between it and the inner peripheral wall of the second cylindrical portion 1012. The other end of the coil 50 extends into the second cylindrical portion 1012 and is spaced apart from the inner peripheral wall of the second cylindrical portion 1012. The side of the first cylindrical portion 1011 away from the magnet 40 abuts against the side of the vibrating plate 30 away from the diaphragm assembly 20, and a gap is formed between the connecting portion 1013 and the vibrating plate 30.

[0051] like Figure 3 , Figure 4 , Figure 5 As shown in Embodiment 1: a gasket 70 is provided at the bottom of the housing 10, the gasket 70 abuts against the bottom of the housing 10, and the periphery of the diaphragm assembly 20 facing the bottom of the housing 10 abuts against the side of the gasket 70 away from the bottom of the housing 10. In this way, the diaphragm assembly 20 and the bottom of the housing 10 can be separated by the gasket 70 to form the aforementioned first cavity.

[0052] like Figure 3 , Figure 4 , Figure 5As shown in Embodiment 1: the spacer portion is a first membrane ring 80, which abuts against the periphery of the diaphragm assembly 20 on the side away from the bottom of the outer shell 10. The periphery of the vibrating plate 30 facing the diaphragm assembly 20 abuts against the side of the first membrane ring 80 away from the diaphragm assembly 20. Thus, the vibrating plate 30 and the diaphragm assembly 20 can be separated by the first membrane ring 80 to form the aforementioned second cavity. The diaphragm assembly 20 includes a diaphragm 21 and a second membrane ring 22. The second membrane ring 22 is connected to the periphery of the diaphragm 21 on the side away from the bottom of the outer shell 10. The first membrane ring 80 abuts against the side of the second membrane ring 22 away from the diaphragm 21. A plating layer 23 is provided on the surface of the diaphragm 21 facing the bottom of the outer shell 10. The plating layer 23 is preferably a metal layer; however, the surface of the diaphragm 21 may also be without a plating layer 23, depending on actual production requirements.

[0053] like Figure 3 , Figure 4 As shown in Embodiment 1: the vibrating plate 30 includes a main body 31, on which a plurality of annular grooves 32 are provided. These annular grooves 32 are arranged alternately around the center of the main body 31. Each annular groove 32 has a head end, a tail end, and a bent portion 33, the bent portion 33 being located between the corresponding head end and tail end. The head end of each annular groove 32 extends to the outside of the bent portion 33 of the adjacent previous annular groove 32, and the tail end of each annular groove 32 extends to the inside of the bent portion 33 of the adjacent next annular groove 32. Furthermore, four annular grooves 32 are provided. Of course, the number of annular grooves 32 is not limited to this number and can be other numbers, depending on actual production needs. This will not be elaborated upon here. The annular grooves 32 are not limited to the above structure; by providing annular grooves 32 on the vibrating plate 30, the overall vibrating plate 30 can be made lighter.

[0054] Furthermore, in this first embodiment, various connections can be achieved through welding, adhesive bonding, screw fastening, and riveting. Those skilled in the art can select the appropriate connection method according to actual needs, and this invention will not elaborate further here.

[0055] like Figure 6 As shown, it displays the test frequency response curve of a prior art bone conduction loudspeaker; as Figure 7 As shown, it displays the test frequency response curve of a prior art air-conducting loudspeaker; as Figure 8 As shown, it displays the test frequency response curve of Embodiment 1 of the present invention; wherein: Figure 6 , Figure 7 , Figure 8 The horizontal axis in the diagram represents bandwidth, and the unit is Hertz (Hz). Figure 6 , Figure 7 , Figure 8 The vertical axis in the graph represents sensitivity, and the unit is dB.

[0056] Depend on Figure 6 It is known that existing bone conduction loudspeakers suffer from insufficient low-frequency response; therefore... Figure 7 It is known that existing air-conducting loudspeakers suffer from problems such as insufficient high frequencies, excessively low frequencies, and insufficient bandwidth; therefore, Figure 8 It can be seen that the present invention effectively solves the problems existing in bone conduction speakers and air conduction speakers in the prior art. The speaker of the present invention has the advantages of sufficient low frequency, sufficient high frequency, and wide frequency bandwidth, while reducing vibration and increasing comfort, resulting in a better experience.

[0057] like Figure 9 As shown, it illustrates the specific structure of Embodiment 2, wherein: Embodiment 2 has the same basic structure as Embodiment 1, except that: in Embodiment 2, the diaphragm assembly includes a diaphragm 21 and a diaphragm ring 103 connected to the diaphragm 21. The diaphragm ring 103 is bonded to the diaphragm 21 and extends circumferentially to form the spacer portion. The diaphragm ring 103 is connected to the periphery of the side of the diaphragm 21 away from the bottom of the outer shell 10, and the periphery of the vibrating plate 30 facing the diaphragm assembly abuts against the side of the diaphragm ring 103 away from the diaphragm.

[0058] like Figure 10 As shown, it illustrates the specific structure of Embodiment 3, in which: Embodiment 3 has the same basic structure as Embodiment 1, except that: a gasket 70 is provided at the inner bottom of the outer shell 10, the gasket 70 abuts against the inner bottom of the outer shell 10, the vibrating plate 30 abuts against the side of the gasket 70 away from the bottom of the outer shell 10, one end of the support base 90 abuts against the side of the vibrating plate 30 away from the gasket 70, the diaphragm assembly 20 abuts against the side of the support base 90 away from the vibrating plate 30, and the magnet 40 is disposed on the side of the vibrating plate 30 away from the gasket 70; one end of the coil 50 is connected to the diaphragm assembly 20, and the other end is surrounding the magnet 40; the diaphragm assembly 20 and the upper cover 60 are spaced apart by the membrane ring 103.

[0059] In summary, the key design feature of this invention lies in its combination of a vibrating plate and a diaphragm assembly, along with a magnet and coil design, which adds an air conduction structure, thus achieving both bone conduction and air conduction functions. This dual-unit sound transmission design allows the coil and magnet to generate a magnetic field signal via an input signal, causing the magnet to vibrate and drive the vibrating plate to vibrate, achieving bone conduction sound generation. Simultaneously, the up-and-down movement of the magnet and vibrating plate compresses the internal air, which in turn drives the diaphragm assembly to generate sound. Combined with the first and second through holes, air conduction sound generation is achieved, and the sound generated by the diaphragm assembly can compensate for vibration. The diaphragm assembly compensates for the lack of bass in bone conduction, increasing speaker power, reducing full-range distortion, and improving sound quality. Simultaneously, the diaphragm buffers the sound from bone conduction, reducing vibration and making the wearer more comfortable. Furthermore, by forming a first cavity between the diaphragm assembly and the inner bottom of the outer shell, and a second cavity between the diaphragm assembly and the diaphragm assembly, the axial space within the speaker's cavity is lengthened, allowing for greater vertical vibration of the magnet and increased power.

[0060] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A loudspeaker combining air conduction and bone conduction, characterized in that: The device includes a housing, a diaphragm assembly, a vibrating plate, a magnet, a coil, and a top cover. The top cover is positioned over the opening of the housing to form a receiving cavity. The diaphragm assembly, vibrating plate, magnet, and coil are all disposed within the receiving cavity. The diaphragm assembly is connected to the housing. The side of the diaphragm assembly facing the bottom of the housing is spaced apart from the inner bottom of the housing to form a first cavity. A gasket is provided at the inner bottom of the housing, and the gasket abuts against the inner bottom of the housing. The side of the diaphragm assembly facing the bottom of the housing abuts against the side of the gasket away from the inner bottom of the housing. The vibrating plate is disposed on the side of the diaphragm assembly away from the bottom of the outer shell, and the vibrating plate is connected to the outer shell; a second cavity is formed between the vibrating plate and the diaphragm assembly; a spacer portion is provided on the side of the diaphragm assembly away from the bottom of the outer shell to separate the vibrating plate and the diaphragm assembly, and the side of the vibrating plate facing the diaphragm assembly abuts against the side of the spacer portion away from the diaphragm assembly. The magnet is positioned on the side of the vibrating plate away from the diaphragm assembly; one end of the coil is connected to the side of the upper cover facing the magnet, and the other end is surrounding the magnet; The diaphragm assembly includes a diaphragm and a diaphragm ring connected to the diaphragm. The diaphragm ring extends circumferentially to form the spacer portion. The diaphragm ring is connected to the periphery of the diaphragm on the side away from the bottom of the housing. The periphery of the vibrating plate facing the diaphragm assembly abuts against the side of the diaphragm ring away from the diaphragm.

2. The loudspeaker combining air conduction and bone conduction according to claim 1, characterized in that: The spacer portion is a first diaphragm ring, which abuts against the periphery of the diaphragm assembly on the side away from the bottom of the housing. The periphery of the vibrating plate on the side facing the diaphragm assembly abuts against the side of the first diaphragm ring away from the diaphragm assembly.

3. The loudspeaker combining air conduction and bone conduction according to claim 2, characterized in that: The diaphragm assembly includes a diaphragm and a second diaphragm ring. The second diaphragm ring is connected to the periphery of the diaphragm on the side away from the bottom of the housing. The first diaphragm ring abuts against the side of the second diaphragm ring away from the diaphragm. The surface of the diaphragm facing the bottom of the housing is provided with a coating.

4. The loudspeaker combining air conduction and bone conduction according to claim 1, characterized in that: A support base is provided inside the receiving cavity. The support base is connected to the outer shell on all four sides. The side of the support base facing the bottom of the outer shell abuts against the periphery of the vibrating plate on the side away from the bottom of the outer shell. The side of the upper cover facing the magnet abuts against the side of the support base away from the vibrating plate. The coil is spaced apart from the support base.

5. The loudspeaker combining air conduction and bone conduction according to claim 4, characterized in that: The cavity is also provided with a support; the support is disposed between the vibrating plate and the magnet to accommodate the magnet; the outer peripheral wall of the support is spaced apart from the inner peripheral wall of the support base, and the other end of the coil extends into the support and is spaced apart from the inner peripheral wall of the support.

6. The loudspeaker combining air conduction and bone conduction according to claim 5, characterized in that: The support includes a first cylindrical portion and a second cylindrical portion; one end of the first cylindrical portion extends outward to form a connecting portion; the connecting portion is connected to one end of the second cylindrical portion, and the space formed by the first cylindrical portion and the second cylindrical portion is interconnected, the inner diameter of the first cylindrical portion is smaller than the inner diameter of the second cylindrical portion; the magnet portion is housed in the first cylindrical portion and extends into the second cylindrical portion, with a distance between it and the inner peripheral wall of the second cylindrical portion; the other end of the coil extends into the second cylindrical portion and is spaced between it and the inner peripheral wall of the second cylindrical portion; the side of the first cylindrical portion away from the magnet abuts against the side of the vibrating plate away from the diaphragm assembly, and a gap is formed between the connecting portion and the vibrating plate.

7. The loudspeaker combining air conduction and bone conduction according to claim 1, characterized in that: The top cover is a circuit board, which has a first through hole communicating with the receiving cavity, and a first tuning component is covered on the outside of the first through hole on the circuit board.

8. The loudspeaker combining air conduction and bone conduction according to claim 1, characterized in that: The bottom of the outer casing is provided with a second through hole communicating with the receiving cavity, and the outer side of the second through hole is covered with a second tuning component on the outer casing.

9. The loudspeaker combining air conduction and bone conduction according to claim 1, characterized in that: The vibrating plate includes a main body, on which a plurality of annular grooves are provided, the plurality of annular grooves being arranged alternately around the center of the main body; each annular groove has a head end, a tail end, and a bend, the bend being located between the corresponding head end and tail end; the head end of each annular groove extends to the outside of the bend of the adjacent previous annular groove, and the tail end of each annular groove extends to the inside of the bend of the adjacent next annular groove.

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