Headphone speaker with double voice coil sound unit

Abstract

The present invention proposes an earphone audio system and a speaker with a dual voice coil sound unit, and relates to the technical field of audio equipment. It comprises an earphone type audio body, on which a first dual voice coil sound unit is provided, and the first dual voice coil sound unit comprises a basin frame, in which a sound part is provided, and an upper cover is provided on the sound part, and the sound part is located between the upper cover and the basin frame; a PCB welding board is provided on the basin frame, and the PCB welding board is electrically connected to the sound part. The present invention realizes the electrical connection of the two voice coils in the dual voice coil sound unit through the PCB welding board, improves the synergy of the dual voice coil sound unit, and thus avoids the performance degradation of the earphone audio and the speaker.

Description

Technical Field

[0001] The present invention relates to the technical field of audio equipment, and in particular to an earphone speaker with a double voice coil sound generating unit. Background Art

[0002] Currently, the sound generating units of earphones, speakers and other sound generating devices are usually single voice coil sound generating units or dual voice coil sound generating units.

[0003] A single voice coil driver usually refers to a single voice coil part in a speaker, which works with the magnet and diaphragm to produce sound. The voice coil is a key component of the speaker driver. It is a coil that generates force in the magnetic field when current passes through it, causing the diaphragm to move, thereby producing sound.

[0004] The dual voice coil sound unit increases the number of voice coils on the basis of the single voice coil sound unit, thereby improving the function of the voice coil. However, the two voice coils in the dual voice coil sound unit will affect each other, resulting in a decrease in the performance of the sound generator or damage to the sound generator. Summary of the invention

[0005] The purpose of the present invention is to overcome the high risk of performance degradation caused by the mutual influence of the two voice coils when the dual voice coil sound unit in the prior art works in the headphone sound. The present invention provides a headphone speaker with a dual voice coil sound unit, and the electrical connection of the two voice coils in the dual voice coil sound unit is realized through a PCB welding board, so as to improve the coordination of the dual voice coil sound unit, thereby avoiding the performance degradation of the headphone sound.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] An earphone speaker with a dual voice coil sound unit comprises an earphone-type sound body, the earphone-type sound body is provided with a first dual voice coil sound unit, the first dual voice coil sound unit comprises a basin frame, a sound generating part is provided in the basin frame, an upper cover is provided on the sound generating part, and the sound generating part is located between the upper cover and the basin frame;

[0008] A PCB welding board is provided on the basin frame, and the PCB welding board is electrically connected to the sound-generating part.

[0009] At present, in the application process of dual voice coil sound units, the mutual influence between the dual voice coils has become the main problem hindering the application of dual voice coil sound units, and the synergy between the dual voice coils is the main factor causing this problem.

[0010] The present invention adopts a PCB welding board to electrically connect the two voice coils in the first dual voice coil sound unit, and avoids the dual voice coils working independently by connecting them in series or in parallel. The PCB welding board is arranged on the basin frame, and the distance is reduced in a physical sense, so as to avoid delay in the influence on the sound part of the first dual voice coil sound unit, thereby further improving the coordination of the first dual voice coil sound unit, thereby improving the performance of the headphone type audio body, and avoiding performance degradation and functional damage caused by coordination problems.

[0011] Furthermore, the upper cover comprises a stepped cover plate, an outer edge section is provided at the edge of the stepped cover plate, the outer edge section extends and abuts against the inner wall of the basin frame, and a center hole is provided at the geometric center of the stepped cover plate.

[0012] The upper cover of the present invention adopts a stepped cover plate as the main body, and the upper cover and the basin frame are more closely fitted by extending the outer edge section. The stepped shape of the stepped cover plate is utilized so that the center hole can play a sound-gathering effect when transmitting the sound of the sound-emitting part, thereby more effectively reflecting the sound details.

[0013] Furthermore, the sound-generating part includes a diaphragm, an upper voice coil is provided on the upper surface of the diaphragm, and a lower voice coil is provided on the lower surface of the diaphragm;

[0014] An upper magnetic circuit is provided above the upper voice coil, fixed to the basin frame with a gap between the upper voice coil and the lower magnetic circuit is provided below the lower voice coil, fixed to the basin frame with a gap between the lower voice coil and the lower magnetic circuit.

[0015] Furthermore, a support ring is provided between the lower magnetic circuit and the diaphragm, and the support ring fits the outer edge of the diaphragm and is fixed to the diaphragm.

[0016] Furthermore, the basin frame includes a basin body, the bottom of the basin body is provided with a basin bottom step, and the sound-generating part is embedded in the basin bottom step;

[0017] The basin body extends outward from the basin bottom step to form a basin edge, and the outer bottom surface of the basin edge is provided with a plurality of through holes, the through holes are circumferentially distributed around the center of the basin body, and the line connecting the centers of the through holes is an arc, and the arc is a minor arc;

[0018] Both ends of the inferior arc are provided with convex strips, the PCB welding plate covers the basin edge, the convex strips can be embedded in the PCB welding plate, and the PCB welding plate can be electrically connected to the sound-generating part through the through hole.

[0019] Furthermore, a first positioning notch is provided on the side of the upper cover, and a second positioning notch is provided on the side of the basin frame, and positions of the first positioning notch and the second positioning notch correspond to each other: the first positioning notch can be nested in the second positioning notch.

[0020] On this basis, the magnetic circuit structure in the present invention adopts an upper and lower dual magnetic structure, and the upper and lower magnetic circuits are both composed of an inner magnet and an outer magnet, and the voice coil is placed in the middle of the upper and lower magnetic circuits. In this way, it can be ensured that the upper and lower vibrations of the voice coil will be affected by the upper and lower magnetic field forces at the same time. The voice coil adopts a flat voice coil structure, which is placed above the inner and outer magnets and is affected by the magnetic fields of the inner and outer magnets. The advantage of the flat structure of the upper and lower voice coils is that the thickness is thinner, which can reduce the overall thickness of the speaker. The upper voice coil and the lower voice coil are respectively attached to the upper and lower surfaces of the diaphragm dome, so that the diaphragm is attached to both sides of the diaphragm. A dual voice coil structure is adopted, and the two voice coils are connected and conducted through the PCB board on the speaker basin frame. In this way, the number of voice coils of the speaker can be doubled. According to the Ampere force formula: F=BIL, where L is the number of voice coils, the number of voice coils L doubles, the Ampere force F doubles, and the sound pressure level output by the speaker increases by 3dB. Therefore, the use of a dual voice coil structure can effectively improve the output of the speaker, thereby effectively improving the sound function of the present invention.

[0021] An earphone speaker with a dual voice coil sound unit, comprising a box body, a second dual voice coil sound unit is embedded on the box wall of the box body, and an earphone compartment is provided in the box body, wherein the earphone speaker with a dual voice coil sound unit according to any one of claims 1 to 6 can be placed in the earphone compartment;

[0022] The box body is provided with a box cover, an upper electrical connection contact assembly is provided in the box body, the upper electrical connection contact assembly is located below the earphone compartment, the earphone-type sound body in the earphone speaker box with a dual voice coil sound unit can penetrate the earphone compartment and push the upper electrical connection contact assembly downward, a lower electrical connection contact assembly is provided below the upper electrical connection contact assembly, a connecting belt is provided on the box cover, one end of the connecting belt is fixed to the box cover, and the other end thereof is fixed to the lower electrical connection contact assembly, and when the box cover is opened, the connecting belt can pull the lower electrical connection contact assembly upward;

[0023] The upper electrical connection contact assembly and the lower electrical connection contact assembly contact and connect the electrical connection of the second dual voice coil sound unit, and the structure of the second dual voice coil sound unit is the same as the structure of the first dual voice coil sound unit in the earphone speaker with a dual voice coil sound unit.

[0024] At present, when dual voice coil sound units are applied, they are usually used alone in headphones, speakers, sound boxes and other sound generators. Different application environments often require different sound generators, so users will widely prepare several different sound devices to meet their needs. However, if the switching process is not smooth and the two sound generators work at the same time, it will cause great hearing interference, which is not conducive to user experience.

[0025] The present invention is used to store the headphone type audio body by arranging an earphone compartment in the box body. When the headphone type audio body is taken out of the earphone compartment, there is a gap between the upper electrical connection contact component and the lower electrical connection contact component, thereby ensuring that the electrical connection of the second dual voice coil sound-emitting unit is disconnected. At this time, the second dual voice coil sound-emitting unit will not make a sound. When the second dual voice coil sound-emitting unit makes a sound, the second dual voice coil sound-emitting unit will not affect the use of the headphone type audio body. When the headphone type audio body is placed in the earphone compartment and the box cover is in an open state, the upper electrical connection contact component and the lower electrical connection contact component can be in contact and connected, thereby ensuring that the electrical connection of the second dual voice coil sound-emitting unit is closed, and the second dual voice coil sound-emitting unit starts to make a sound, so that the headphone type audio body can be switched to a speaker for application when it is not worn, so that the user can effectively complete the switching between the headphone type audio body and the speaker application, and can also use different application forms to apply the sounder when needed.

[0026] Furthermore, the upper electrical connection contact assembly includes an upper electrical connection contact plate, which is located below the earphone compartment, and a telescopic rod is provided between the earphone compartment and the upper electrical connection contact plate, one end of the telescopic rod is fixed to the earphone compartment, and the other end thereof is fixed to the upper electrical connection contact plate, and a spring is sleeved on the telescopic rod, and the spring can pull the telescopic rod to retract.

[0027] Further, the lower electrical connection contact assembly includes a lower electrical connection contact plate, and the connection belt is fixed to the lower electrical connection contact plate;

[0028] A guide rod is fixed in the box body, and the guide rod passes through the lower electrical connection contact plate. The lower electrical connection contact plate can slide freely along the guide rod.

[0029] Furthermore, a contact pad is provided in the earphone compartment, and the contact pad fits the inner wall of the earphone compartment and contacts the earphone-type audio body.

[0030] In the present invention, the telescopic rod in the upper electrical connection contact assembly is used to control the movement trajectory of the upper electrical connection contact plate, the spring is used to reset the position of the upper electrical connection contact plate by utilizing elastic potential energy, the connecting belt is used to provide a lifting force to the lower electrical connection contact plate by opening the box cover, the guide rod is used to control the movement trajectory of the lower electrical connection contact plate, and the contact pad in the earphone compartment can prevent the earphone compartment from being worn due to frequent taking of the earphone-type audio body.

[0031] In summary, the present invention has the following beneficial effects compared with the prior art:

[0032] (1) The present invention uses a PCB welding board to electrically connect the two voice coils in the first dual voice coil sound generating unit, and avoids the dual voice coils from working independently by connecting them in series or in parallel, thereby improving the synergy of the dual voice coil sound generating unit during application.

[0033] (2) In the present invention, the sound state between the earphone type audio body and the sound box can be switched by closing and disconnecting the upper electrical connection contact component and the lower electrical connection contact component, so that the user can freely switch the application form of the sound generator according to his own needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a schematic diagram of the structure of the earphone sound system of the present invention;

[0036] Figure 2 It is a schematic structural diagram of a first double voice coil sound generating unit of the present invention;

[0037] Figure 3 A cross-sectional view of a first dual voice coil sound generating unit of the present invention;

[0038] Figure 4 It is a schematic diagram of the upper cover structure in the present invention;

[0039] Figure 5 This is a schematic diagram of the basin frame structure in the present invention;

[0040] Figure 6 This is a schematic structural diagram of the basin stand of the present invention from another viewing angle;

[0041] Figure 7 This is a schematic diagram of the speaker structure of the present invention;

[0042] Figure 8 It is a cross-sectional view of the speaker of the present invention.

[0043] Icons: 1. Box cover; 2. Box body; 3. First dual voice coil sound unit; 4. Headphone-type sound body; 5. Second dual voice coil sound unit; 21. Box wall; 22. Headphone compartment; 23. Contact pad; 24. Upper electrical connection contact assembly; 25. Lower electrical connection contact assembly; 241. Spring; 242. Telescopic rod; 243. Upper electrical connection contact plate; 251. Connecting belt; 252. Lower electrical connection contact plate; 253. Guide rod; 31. Upper cover; 32, sound-emitting part; 33, basin frame; 34, PCB welding plate; 311, center hole; 312, stepped cover plate; 313, outer edge section; 314, first positioning notch; 321, upper magnetic circuit; 322, upper voice coil; 323, diaphragm; 324, lower voice coil; 325, support ring; 326, lower magnetic circuit; 331, basin body; 332, second positioning notch; 333, basin bottom step; 334, through hole; 335, convex strip. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example:

[0047] Please refer to Figure 1-Figure 5 shown.

[0048] The present application provides an earphone speaker with a dual voice coil sound unit, comprising an earphone-type sound body 4, on which a first dual voice coil sound unit 3 is provided, the first dual voice coil sound unit 3 comprises a basin frame 33, a sounding part 32 is provided in the basin frame 33, an upper cover 31 is provided on the sounding part 32, and the sounding part 32 is located between the upper cover 31 and the basin frame 33;

[0049] A PCB welding board 34 is provided on the basin frame 33 , and the PCB welding board 34 is electrically connected to the sound-generating part 32 .

[0050] In actual application, this embodiment is provided with a first dual-voice coil sound unit 3, and the dual-voice coil is used to improve the resonance energy, so that the sound quality details of the sound generator can be more effectively improved. The sound part 32 in this embodiment is used to emit sound, and the basin frame 33 is used to provide a space for accommodating the sound part 32 and provide a resonance cavity. The upper cover 31 can effectively protect the sound part 32 and transmit the sound of the sound part. The PCB welding board 34 can effectively improve the synergy of the two voice coils in the first dual-voice coil sound unit 3, thereby improving the sound quality performance of this embodiment. The headphone-type sound body 4 in this embodiment is a sound in the form of a headphone, so this embodiment can be used as a sound application when applied, improving the adaptability of the application process of this embodiment.

[0051] The upper cover 31 includes a stepped cover plate 312 , an outer edge section 313 is provided at the edge of the stepped cover plate 312 , the outer edge section 313 extends and abuts against the inner wall of the basin frame 33 , and a center hole 311 is provided at the geometric center of the stepped cover plate 312 .

[0052] The sound-generating part 32 includes a diaphragm 323 , an upper voice coil 322 is disposed on the upper surface of the diaphragm 323 , and a lower voice coil 324 is disposed on the lower surface of the diaphragm 323 ;

[0053] An upper magnetic circuit 321 is provided above the upper voice coil 322 , and the upper magnetic circuit 321 is fixed to the basin frame 33 with a gap between the upper voice coil 322 . A lower magnetic circuit 326 is provided below the lower voice coil 324 , and the lower magnetic circuit 326 is fixed to the basin frame 33 with a gap between the lower voice coil 324 .

[0054] In the application process of this embodiment, the upper voice coil 322 and the lower voice coil 324 are powered by connecting power to the PCB welding board 34, and the upper voice coil 322 and the lower voice coil 324 are electrically connected to generate magnetism, and under the action of the upper magnetic circuit 321 and the lower magnetic circuit 326, the upper voice coil 322 and the lower voice coil 324 can drive the diaphragm 323 to vibrate, thereby producing sound. The gap between the upper magnetic circuit 321 and the upper voice coil 322 is used to provide a resonance space, and the gap between the lower magnetic circuit 326 and the lower voice coil 324 is also used to provide a resonance space.

[0055] A support ring 325 is disposed between the lower magnetic circuit 326 and the diaphragm 323 . The support ring 325 is attached to the outer edge of the diaphragm 323 and is fixed to the diaphragm 323 .

[0056] In order to ensure the vibration stability of the diaphragm 323, a support ring 325 is provided to improve the stability of the diaphragm vibration.

[0057] The diaphragm 323 is made of elastic material, such as PEEK, PU, ​​PET, PET, etc. The dome at the center of the diaphragm is made of a material with good rigidity and a flat structure, which is convenient for bonding the voice coil. The dome material can be plastic or metal, carbon fiber, or other hard and light materials.

[0058] The basin frame 33 includes a basin body 331 , and a basin bottom step 333 is provided at the bottom of the basin body 331 , and the sound-generating part 32 is embedded in the basin bottom step 333 ;

[0059] The basin body 331 extends outward from the basin bottom step 333 to form a basin edge, and the outer bottom surface of the basin edge is provided with a plurality of through holes 334, and the through holes 334 are circumferentially distributed around the center of the basin body 331, and the line connecting the centers of the through holes 334 is an arc, and the arc is a minor arc;

[0060] Both ends of the inferior arc are provided with convex strips 335 , the PCB welding plate 34 covers the basin edge, the convex strips 335 can be embedded in the PCB welding plate 34 , and the PCB welding plate 34 can be electrically connected to the sound-generating part 32 through the through hole 334 .

[0061] The bottom of the basin frame 33 in this embodiment is provided with a basin bottom step 333, which accommodates the sound-generating part 32 and provides the cavity space required for resonant sound generation. The through hole 334 on the basin edge can facilitate the electrical connection between the PCB welding board 34 and the upper voice coil 322 and the lower voice coil 324, so that the upper voice coil 322 and the lower voice coil 324 are connected in series or in parallel, which is beneficial to the performance of the sound details of the sound-generating part 32 when generating sound. The convex strip can effectively determine the positioning direction of the basin frame 33, thereby ensuring the effective use of this embodiment.

[0062] A first positioning notch 314 is provided on the side of the upper cover 31 , and a second positioning notch 332 is provided on the side of the basin frame 33 . The positions of the first positioning notch 314 and the second positioning notch 332 correspond to each other: the first positioning notch 314 can be nested in the second positioning notch 332 .

[0063] The positions of the first positioning notch 314 and the second positioning notch 332 correspond to each other, so as to facilitate the overall assembly of this embodiment.

[0064] An earphone speaker with a dual voice coil sound unit comprises a box body 2, a second dual voice coil sound unit 5 is embedded on a box wall 21 of the box body 2, an earphone compartment 22 is provided in the box body 2, and the earphone speaker with a dual voice coil sound unit can be placed in the earphone compartment 22;

[0065] The box body 2 is provided with a box cover 1, an upper electrical connection contact assembly 24 is provided in the box body 2, and the upper electrical connection contact assembly 24 is located below the earphone compartment 22. The earphone-type sound body 4 in the earphone speaker with a dual voice coil sound unit can penetrate the earphone compartment 22 and push the upper electrical connection contact assembly 24 downwards, and a lower electrical connection contact assembly 25 is provided below the upper electrical connection contact assembly 24. A connecting belt 251 is provided on the box cover 1, one end of the connecting belt 251 is fixed to the box cover 1, and the other end thereof is fixed to the lower electrical connection contact assembly 25. When the box cover 1 is opened, the connecting belt 251 can pull the lower electrical connection contact assembly 25 upwards;

[0066] The upper electrical connection contact component 24 and the lower electrical connection contact component 25 contact and connect the electrical connection of the second dual voice coil sound unit 5, and the structure of the second dual voice coil sound unit 5 is the same as the structure of the first dual voice coil sound unit 3 in the earphone speaker with a dual voice coil sound unit.

[0067] In actual application of this embodiment, it is necessary to accommodate the earphone speaker with a dual voice coil sound unit through the box body 2, and by placing the earphone type audio body 4 into the earphone compartment 22, the structure and weight of the earphone type audio body 4 can be used to push the upper electrical connection contact component 24 downward, and then by opening the box cover 1, the lower electrical connection contact component 25 is lifted upward by pulling the connecting belt 251. When the upper electrical connection contact component 24 and the lower electrical connection contact component 25 are in contact with each other, the power of the second dual voice coil sound unit 5 can be connected, so that the second dual voice coil sound unit 5 makes a sound.

[0068] The present embodiment utilizes the cooperation between the earphone-type audio body 4 and the box cover 1 to connect the circuit of the second dual-voice coil sound-emitting unit 5, thereby increasing the sound-emitting location. The earphone-type audio body 4 is located in the box 2, so the second dual-voice coil sound-emitting unit 5 on the box 2 is effectively switched to become the main sound-emitting unit. The overall application form of the present embodiment is changed, so that the present embodiment can obtain a wider application form and effectively improve the user experience.

[0069] The upper electrical connection contact assembly 24 includes an upper electrical connection contact plate 243, which is located below the earphone compartment 22. A telescopic rod 242 is provided between the earphone compartment 22 and the upper electrical connection contact plate 243. One end of the telescopic rod 242 is fixed to the earphone compartment 22, and the other end is fixed to the upper electrical connection contact plate 243. A spring 241 is sleeved on the telescopic rod 242, and the spring 241 can pull the telescopic rod 242 to retract.

[0070] The lower electrical connection contact assembly 25 comprises a lower electrical connection contact plate 252, and the connection belt 251 is fixed to the lower electrical connection contact plate 252;

[0071] A guide rod 253 is fixed in the box body 2 . The guide rod 253 passes through the lower electrical connection contact plate 252 . The lower electrical connection contact plate 252 can slide freely along the guide rod 253 .

[0072] In this embodiment, when the upper electrical connection contact plate 243 and the lower electrical connection contact plate 252 contact each other, the circuit of the second dual voice coil generating unit 5 can be connected. During the downward pushing of the upper electrical connection contact plate 243, the movement direction is limited by the telescopic rod 242, thereby ensuring that the upper electrical connection contact plate 243 can be pushed toward the lower electrical connection contact plate 252, and the spring 241 can provide a pulling force to the upper electrical connection contact plate 243 when the earphone compartment 22 is removed from the earphone-type sound body 4, thereby helping the upper electrical connection contact plate 243 to reset.

[0073] When the lower electrical connection contact plate 252 is subjected to the lifting force of the connecting belt 251, it will be lifted toward the upper electrical connection contact plate 243 under the guidance of the guide rod 253, thereby ensuring that the upper electrical connection contact plate 243 and the lower electrical connection contact plate 252 can contact each other. The length of the guide rod 253 should be controlled within an appropriate range to ensure the normal realization of the guiding function, but avoid blocking the contact between the upper electrical connection contact plate 243 and the lower electrical connection contact plate 252.

[0074] A contact pad 23 is provided in the earphone chamber 22 , and the contact pad 23 is attached to the inner wall of the earphone chamber 22 and in contact with the earphone-type audio body 4 .

[0075] In this embodiment, the contact pad 23 in the earphone compartment 22 can effectively protect the earphone-type audio body 4 and prevent it from being damaged during storage.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An earphone speaker with a dual voice coil sound unit, comprising an earphone-type sound body, characterized in that: The headphone-type sound body is provided with a first dual-voice coil sound-generating unit (3), the first dual-voice coil sound-generating unit (3) comprising a basin frame (33), a sound-generating portion (32) being provided inside the basin frame (33), an upper cover (31) being provided on the sound-generating portion (32), and the sound-generating portion (32) being located between the upper cover (31) and the basin frame (33); A PCB welding board (34) is provided on the basin frame (33), and the PCB welding board (34) is electrically connected to the sound-generating part (32); It also comprises a box body (2), a second double voice coil sound generating unit (5) being embedded on a box wall (21) of the box body (2), and an earphone compartment (22) being provided in the box body (2), wherein the earphone type sound body can be placed in the earphone compartment (22); The box body (2) is provided with a box cover (1), an upper electrical connection contact assembly (24) is provided inside the box body (2), the upper electrical connection contact assembly (24) is located below the earphone compartment (22), the earphone-type sound body (4) in the earphone speaker box with a dual voice coil sound unit can penetrate the earphone compartment (22) and push the upper electrical connection contact assembly (24) downwards, a lower electrical connection contact assembly (25) is provided below the upper electrical connection contact assembly (24), a connecting belt (251) is provided on the box cover (1), one end of the connecting belt (251) is fixed to the box cover (1), and the other end thereof is fixed to the lower electrical connection contact assembly (25), and when the box cover (1) is opened, the connecting belt (251) can pull the lower electrical connection contact assembly (25) upwards; The upper electrical connection contact assembly (24) and the lower electrical connection contact assembly (25) are in contact with each other to electrically connect the second dual voice coil sound generating unit (5); the structure of the second dual voice coil sound generating unit (5) is the same as the structure of the first dual voice coil sound generating unit (3) in the earphone speaker box with the dual voice coil sound generating unit.

2. The earphone speaker with a dual voice coil sound unit according to claim 1, characterized in that: The upper cover (31) comprises a stepped cover plate (312), an outer edge section (313) is provided at the edge of the stepped cover plate (312), the outer edge section (313) extends and abuts against the inner wall of the basin frame (33), and a center hole (311) is provided at the geometric center of the stepped cover plate (312).

3. The earphone speaker with a dual voice coil sound unit according to claim 1, characterized in that: The sound-generating part (32) comprises a diaphragm (323), an upper voice coil (322) is provided on the upper surface of the diaphragm (323), and a lower voice coil (324) is provided on the lower surface of the diaphragm (323); An upper magnetic circuit (321) is provided above the upper voice coil (322), the upper magnetic circuit (321) is fixed to the basin frame (33) and a gap is left between the upper voice coil (322), and a lower magnetic circuit (326) is provided below the lower voice coil (324), the lower magnetic circuit (326) is fixed to the basin frame (33) and a gap is left between the lower voice coil (324).

4. The earphone speaker with a dual voice coil sound unit according to claim 3, characterized in that: A support ring (325) is provided between the lower magnetic circuit (326) and the diaphragm (323); the support ring (325) fits the outer edge of the diaphragm (323) and is fixed to the diaphragm (323).

5. The earphone speaker with a dual voice coil sound unit according to claim 1, characterized in that: The basin frame (33) comprises a basin body (331), the bottom of the basin body (331) is provided with a basin bottom step (333), and the sound-generating portion (32) is embedded in the basin bottom step (333); The basin body (331) extends outward from the basin bottom step (333) to form a basin edge, and the outer bottom surface of the basin edge is provided with a plurality of through holes (334), the through holes (334) are circumferentially distributed around the center of the basin body (331), and the line connecting the centers of the through holes (334) is an arc, and the arc is a minor arc; Both ends of the inferior arc are provided with convex strips (335), the PCB welding plate (34) covers the basin edge, the convex strip (335) can be embedded in the PCB welding plate (34), and the PCB welding plate (34) can be electrically connected to the sound-generating part (32) through the through hole (334).

6. The earphone speaker with a dual voice coil sound unit according to claim 1, characterized in that: A first positioning notch (314) is provided on the side of the upper cover (31), and a second positioning notch (332) is provided on the side of the basin frame (33); the positions of the first positioning notch (314) and the second positioning notch (332) correspond to each other: the first positioning notch (314) can be nested in the second positioning notch (332).

7. The earphone speaker with a dual voice coil sound unit according to claim 1, characterized in that: The upper electrical connection contact assembly (24) comprises an upper electrical connection contact plate (243), wherein the upper electrical connection contact plate (243) is located below the earphone compartment (22), and a telescopic rod (242) is provided between the earphone compartment (22) and the upper electrical connection contact plate (243), wherein one end of the telescopic rod (242) is fixed to the earphone compartment (22), and the other end of the telescopic rod (242) is fixed to the upper electrical connection contact plate (243), and a spring (241) is sleeved on the telescopic rod (242), and the spring (241) can pull the telescopic rod (242) to retract.

8. The earphone speaker with a dual voice coil sound unit according to claim 1, characterized in that: The lower electrical connection contact assembly (25) comprises a lower electrical connection contact plate (252), and the connection belt (251) is fixed to the lower electrical connection contact plate (252); A guide rod (253) is fixed in the box body (2); the guide rod (253) penetrates the lower electrical connection contact plate (252); and the lower electrical connection contact plate (252) can slide freely along the guide rod (253).

9. The earphone speaker with a dual voice coil sound unit according to claim 1, characterized in that: A contact pad (23) is provided in the earphone chamber (22), and the contact pad (23) fits the inner wall of the earphone chamber (22) and contacts the earphone-type sound body (4).

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