Headphone sound box with double-sided magnetic circuit unit

Abstract

The present invention proposes an earphone sound system and a sound box with a double-sided magnetic circuit unit, and relates to the technical field of audio equipment. It comprises a mounting base, on which a double-magnetic circuit sound unit is arranged, and the double-magnetic circuit sound unit comprises a basin frame, in which a sound system is arranged, and an upper cover is arranged on the sound system, and the sound system is located between the upper cover and the basin frame; the sound system comprises a double-magnetic circuit system and a vibration system, and the vibration system is nested in the double-magnetic circuit system; a PCB welding board is arranged on the basin frame, and the PCB welding board is electrically connected to the sound system. The present invention effectively improves the sound quality by designing a double-magnetic circuit of the sound system, so that the sound system can reflect more sound details, and improve the overall sound quality and the stability of sound output.

Description

Technical Field

[0001] The present invention relates to the technical field of audio equipment, and in particular to an earphone audio system and a sound box with a double-sided magnetic circuit 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.

[0005] When using a single magnetic circuit drive for a single voice coil or dual voice coil structure, poor sound effects will be obtained in terms of energy intensity and output stability. Therefore, a more effective voice coil driving method is urgently needed in the field of audio equipment technology to improve the sound effect. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art that a single magnetic circuit is used to drive the voice coil, resulting in poor sound effects. The present invention relates to an earphone sound system and a sound box with a double-sided magnetic circuit unit. By designing a double magnetic circuit for the sound system, the sound quality is effectively improved, so that the sound system can reflect more sound details, and the overall sound quality and sound output stability are improved.

[0007] The purpose of the present invention is mainly achieved through the following technical solutions:

[0008] An earphone sound system with a double-sided magnetic circuit unit comprises a mounting base, a double-magnetic circuit sound-generating unit is arranged on the mounting base, the double-magnetic circuit sound-generating unit comprises a basin frame, a sound-generating system is arranged in the basin frame, an upper cover is arranged on the sound-generating system, and the sound-generating system is located between the upper cover and the basin frame;

[0009] The sound-generating system comprises a dual magnetic circuit system and a vibration system, wherein the vibration system is nested in the dual magnetic circuit system;

[0010] A PCB welding board is arranged on the basin frame, and the PCB welding board is electrically connected to the vibration system.

[0011] At present, in the existing technology, a single magnetic circuit is usually used to drive the voice coil to vibrate, so that the sound system can make sound. In a simple sound system, the design of the single magnetic circuit is relatively simple, and the cost is low and the production efficiency is high. However, in a more complex sound system, the driving ability of the single magnetic circuit is significantly weakened, resulting in the sound system being unable to effectively make sound or unable to effectively reflect the sound details, resulting in poor sound quality.

[0012] The present invention nests the vibration system in the dual magnetic circuit system by setting up a dual magnetic circuit system, so that the dual magnetic circuit system can drive the vibration action of the vibration system from both sides of the vibration system. The dual-sided action of the dual magnetic circuit system can not only prompt the vibration system to emit more detailed sounds, thereby improving the sound quality, but also provide stronger generation energy, thereby satisfying the maximum amplitude of the vibration system and prompting the vibration system to change the vibration frequency more flexibly, thereby ensuring that the sound effect of the sound-generating system reaches the best state. The dual magnetic circuit system can more effectively develop the potential of the vibration system.

[0013] In the present invention, the vibration system can more effectively cooperate with the work of the dual magnetic circuit system through the electrical connection of the PCB welding plate.

[0014] 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.

[0015] Further, the vibration system 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;

[0016] The dual magnetic circuit system includes an upper magnetic circuit and a lower magnetic circuit, the upper magnetic circuit is located above the upper voice coil, fixed to the basin frame with a gap between the upper magnetic circuit and the upper voice coil, and the lower magnetic circuit is located below the lower voice coil, fixed to the basin frame with a gap between the lower magnetic circuit and the lower voice coil.

[0017] 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.

[0018] Furthermore, the basin frame includes a basin body, the bottom of the basin body is provided with a basin bottom step, and the sound system is embedded in the basin bottom step;

[0019] 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;

[0020] 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 system through the through hole.

[0021] 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.

[0022] A sound box with a double-sided magnetic circuit unit comprises a box body, a mounting cavity is provided in the box body, an earphone sound system with a double-sided magnetic circuit unit is mounted in the mounting cavity, and a mounting base of the earphone sound system with a double-sided magnetic circuit unit passes through the bottom of the box body and extends outside the box body;

[0023] A plurality of top corner heat dissipation channels are arranged on the box body, and the top corner heat dissipation channels run through from the front side of the box body to the back side of the box body.

[0024] At present, when using a speaker, in order to improve the sound quality and the performance of sound details, the energy output of the speaker is enhanced. When the present invention adopts an earphone sound system with a double-sided magnetic circuit unit to manufacture a speaker, by setting a mounting cavity, it is ensured that there is enough resonance space in the box, thereby ensuring the output sound quality of the speaker.

[0025] The mounting base in the present invention can facilitate the installation of the earphone sound system with a double-sided magnetic circuit unit at any usable position, thereby improving the applicability of the present invention.

[0026] Due to the high output energy, the box in the present invention is prone to overheating, but conventional air cooling measures are not suitable for cooling the interior of the speaker, which will affect the sound effect of the speaker itself.

[0027] The top angle heat dissipation channel in the present invention avoids directly acting on the installation cavity of the box body by setting the top angle position, so as to reduce the temperature while minimizing the influence on the sound of the speaker.

[0028] Furthermore, the top corner heat dissipation channel includes a heat exchange cavity and a heat dissipation air duct, the heat exchange cavity is parallel to the heat dissipation air duct, and the heat exchange cavity is close to the installation cavity.

[0029] Furthermore, the heat exchange cavity includes a contact plate, which completely covers the contact surface with the installation cavity and fits with the installation cavity. Several heat exchange plates are arranged in the heat exchange cavity, one side of the heat exchange plate abuts against the contact plate, and the other side thereof abuts against the heat dissipation duct.

[0030] Further, the heat dissipation air duct includes a main air duct, the main air duct extends to the front of the box and has an air inlet, a side branch air duct is arranged in the main air duct, a side branch air duct is arranged in the side branch air duct, a gas collecting cavity is arranged on the side of the side branch air duct, a gas collecting pipe is arranged in the gas collecting cavity, one end of the gas collecting pipe is connected to the gas collecting cavity, and the other end thereof is connected to the main air duct;

[0031] The main air duct extends to the back of the box body and is connected to a narrow air duct. The main air duct is provided with a plurality of anti-return baffles near the narrow air duct, and the anti-return baffles are parallel to each other. A anti-return block is provided at the entrance of the narrow air duct, and the anti-return block protrudes into the narrow air duct.

[0032] The narrow air duct extends to the back of the box and is connected to an exhaust opening, and the exhaust opening is communicated with the outside;

[0033] A fan is arranged at the outlet of the narrow tube air duct.

[0034] The arrangement of the main air duct, the narrow tube air duct and the exhaust opening in the present invention can effectively utilize the narrow tube effect to achieve rapid circulation of 76%, thereby taking away more heat under the action of smaller fan power and achieving cooling of the inside of the box.

[0035] In summary, the present invention has the following beneficial effects compared with the prior art:

[0036] (1) The present invention nests the vibration system inside the dual magnetic circuit system through the setting of the dual magnetic circuit system, so that the vibration system can obtain more vibration energy, ensuring that the overall sound quality and sound details of the sound system can be fully expressed, and can also effectively exert the potential of the vibration system.

[0037] (2) The top corner heat dissipation channel of the present invention avoids directly acting on the installation cavity of the box by setting the top corner position, thereby reducing the temperature while minimizing the impact on the sound of the speaker.

[0038] (3) The arrangement of the main air duct, the narrow air duct, and the exhaust opening in the present invention can effectively utilize the narrow air effect to achieve rapid circulation of air, thereby taking away more heat with a smaller fan power and achieving cooling of the interior of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] Figure 1 It is a schematic diagram of the structure of the dual magnetic circuit sound generating unit of the present invention;

[0041] Figure 2 It is a schematic cross-sectional view of the double magnetic circuit sound generating unit of the present invention;

[0042] Figure 3 It is a schematic diagram of the upper cover structure of the present invention;

[0043] Figure 4 This is a schematic diagram of the basin frame structure in the present invention;

[0044] Figure 5 This is a schematic diagram of the basin frame structure from another perspective in the present invention;

[0045] Figure 6 This is a schematic diagram of the speaker structure of the present invention;

[0046] Figure 7 This is a top sectional view of the speaker structure of the present invention.

[0047] Icons: 1. Mounting base; 2. Box; 3. Dual magnetic circuit sound unit; 4. Top corner heat dissipation channel; 31. Upper cover; 32. Sound system; 33. Basin frame; 34. PCB welding board; 311. Center hole; 312. Step cover; 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; 41, heat exchange chamber; 42, air inlet; 43, air collecting pipe; 44, air collecting chamber; 45, main air duct; 46, side branch air duct; 47, non-return baffle; 48, side branch air duct; 49, non-return block; 410, heat exchange plate; 411, narrow tube air duct; 412, exhaust opening; 413, contact plate; 414, fan; 415, installation cavity. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] Example:

[0051] Please refer to Figure 1-Figure 5 shown.

[0052] The present application provides an earphone sound system with a double-sided magnetic circuit unit, comprising a mounting base 1, on which a double-magnetic circuit sound-generating unit 3 is disposed, the double-magnetic circuit sound-generating unit 3 comprises a basin frame 33, in which a sound-generating system 32 is disposed, an upper cover 31 is disposed on the sound-generating system, and the sound-generating system 32 is located between the upper cover 31 and the basin frame 33;

[0053] The sound generating system 32 includes a dual magnetic circuit system and a vibration system, wherein the vibration system is embedded in the dual magnetic circuit system;

[0054] A PCB welding board 34 is provided on the basin frame 33 , and the PCB welding board 34 is electrically connected to the vibration system.

[0055] This embodiment nests the vibration system in the dual magnetic circuit system by setting up a dual magnetic circuit system, so that the dual magnetic circuit system can drive the vibration action of the vibration system from both sides of the vibration system. The dual-sided effect of the dual magnetic circuit system can not only prompt the vibration system to emit more detailed sounds, thereby improving the sound quality, but also provide stronger generation energy, thereby satisfying the maximum amplitude of the vibration system and prompting the vibration system to change the vibration frequency more flexibly, thereby ensuring that the sound effect of the sound system reaches the best state. The dual magnetic circuit system can more effectively develop the potential of the vibration system.

[0056] 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 .

[0057] The vibration system includes 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;

[0058] The dual magnetic circuit system includes an upper magnetic circuit 321 and a lower magnetic circuit 326. The upper magnetic circuit 321 is located above the upper voice coil 322, fixed to the basin frame 33, and a gap is left between the upper magnetic circuit 321 and the upper voice coil 322. The lower magnetic circuit 326 is located below the lower voice coil 324, fixed to the basin frame 33, and a gap is left between the lower magnetic circuit 326 and the lower voice coil 324.

[0059] 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 .

[0060] 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 system 32 is embedded in the basin bottom step 333 ;

[0061] 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;

[0062] A convex strip 335 is provided at both ends of the inferior arc, and 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 system 32 through the through hole 334.

[0063] 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 .

[0064] In actual application of this embodiment, the upper magnetic circuit 321 and the lower magnetic circuit 326 exert driving force on the upper voice coil 322 and the lower voice coil 324 by working together. The upper voice coil 322 and the lower voice coil 324 are connected in parallel through the PCB welding plate 34, so that the diaphragm 323 can be driven effectively, and sound is emitted through the vibration of the diaphragm 323. Since the forces exerted by the upper magnetic circuit 321 and the lower magnetic circuit 326 on the upper voice coil 322 and the lower voice coil 324 are bidirectional, the energy acting on the upper voice coil 322 and the lower voice coil 324 can be greater, and the driving amplitude of the upper voice coil 322 and the lower voice coil 324 is also easier to control, so that more delicate sounds can be reflected, and the functional performance of the sound system will be better.

[0065] The upper magnetic circuit 321 and the lower magnetic circuit 326 in this embodiment are both composed of an inner magnet and an outer magnet, and the voice coil is placed in the middle of the upper magnetic circuit 321 and the lower magnetic circuit 326. This ensures that the up and down vibrations of the voice coil will be affected by the upper and lower magnetic field forces at the same time. The upper voice coil 322 and the lower voice coil 324 both adopt 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 a flat voice coil structure is that it is thinner and can reduce the overall thickness of the speaker. The diaphragm 323 mainly includes a dome and a folded ring. The upper voice coil 322 and the lower voice coil 324 are attached to the dome of the diaphragm 323, and voice coils are attached to both sides of the diaphragm 323. A dual voice coil structure is adopted, and the two voice coils are connected and conductive through the PCB welding plate 34 on the basin frame 33. This can double the number of voice coils of the sound system 32. According to the Ampere force formula: F=BIL, where L is the number of voice coils, if the number of voice coils L doubles, the Ampere force F doubles, and the sound pressure level output by the sound system 32 increases by 3dB. Therefore, the use of a dual voice coil structure can effectively improve the output of the speaker.

[0066] Specifically, the upper magnetic circuit 321 is composed of an inner magnet and an outer magnet, that is, the outer magnet is N (S), and the inner magnet is S (N), forming a closed magnetic circuit system. The upper voice coil 322 vibrates up and down under the action of the magnetic force lines from N to S in the upper magnetic circuit 321. The lower magnetic circuit 326 is also composed of an inner magnet and an outer magnet, that is, the outer magnet is N (S), and the inner magnet is S (N), forming a closed magnetic circuit system. The lower voice coil 324 vibrates up and down under the action of the magnetic force lines from N to S in the lower magnetic circuit 326. The upper magnetic circuit 321 and the upper voice coil 322, the lower magnetic circuit 326 and the lower voice coil 324, all have a gap of at least 0.1 mm, so that the diaphragm 323 has sufficient vibration space. Since the bonding directions of the upper voice coil 322 and the lower voice coil 324 are opposite, the two voice coils need to be reversed when welding wires to ensure that the vibration directions of the upper voice coil 322 and the lower voice coil 324 are consistent. Therefore, the PCB welding board 34 is composed of 6 pads, the two middle pads are used for audio input, and the two pads on both sides are used to weld two voice coils, where the two voice coils are connected in parallel and in anti-phase. In general, the dual magnetic circuit sound unit of this embodiment has a diaphragm 323, two upper and lower magnets, and two voice coil structures. The overall size of the dual magnetic circuit sound unit is equivalent to the size of a traditional speaker, but the performance is equivalent to the performance of two speakers superimposed.

[0067] In this embodiment, the inner and outer magnets of the upper magnetic circuit 321 are glued to the upper cover to position the magnet height, thereby ensuring a more stable gap between the upper magnet and the upper voice coil 322. The lower magnetic circuit 326 is glued to the basin frame 34 and positioned by the basin frame 34, thereby ensuring a more stable gap between the lower magnetic circuit 326 and the lower voice coil 324.

[0068] The diaphragm 323 is composed of a folded ring and a dome. A support ring 325 is arranged below the folded ring and the dome. The support ring 325 supports and fixes the diaphragm 323. The folded ring is arc-shaped to increase the amplitude of the diaphragm. The material is an elastic material, such as PEEK, PU, ​​PET, PET, etc., which is a composite of one or more materials. The dome has a material with good rigidity and a planar structure, which is convenient for bonding the voice coil. The dome material can be plastic or metal, carbon fiber and other hard and light materials. The upper voice coil 322 is bonded to the upper surface of the dome of the diaphragm 323 by glue, and the lower voice coil 324 is bonded to the lower surface of the dome of the diaphragm 323 by glue.

[0069] A sound box with a double-sided magnetic circuit unit, comprising a box body 2, wherein a mounting cavity 415 is provided in the box body 2, wherein an earphone sound system with a double-sided magnetic circuit unit is mounted in the mounting cavity 415, wherein a mounting base of the earphone sound system with a double-sided magnetic circuit unit passes through the bottom of the box body 2 and extends outside the box body 2;

[0070] A plurality of top corner heat dissipation channels 4 are provided on the box body 2 , and the top corner heat dissipation channels 4 penetrate from the front side of the box body 2 to the back side of the box body 2 .

[0071] The mounting base 1 in this embodiment can facilitate the installation of the earphone sound system with a double-sided magnetic circuit unit at any available position, thereby improving the applicability of this embodiment.

[0072] Due to the increase in output energy, the box body 2 in this embodiment is prone to overheating, but conventional air cooling measures are not suitable for internal cooling of the speaker. The wind force will affect the vibration resonance of the sound system 32, thereby affecting the sound effect of the speaker itself.

[0073] The top angle heat dissipation channel 4 in this embodiment avoids directly acting on the installation cavity 415 of the box body 2 by setting the top angle position, so as to minimize the impact on the sound of the speaker while reducing the temperature.

[0074] The top corner heat dissipation channel 4 includes a heat exchange cavity 41 and a heat dissipation air duct. The heat exchange cavity 41 is parallel to the heat dissipation air duct, and the heat exchange cavity 41 is close to the installation cavity 415 .

[0075] The heat exchange chamber 41 includes a contact plate 413, which completely covers the contact surface with the installation chamber 415 and fits with the installation chamber 415. A plurality of heat exchange plates 410 are arranged in the heat exchange chamber 41, and one side of the heat exchange plate 410 abuts against the contact plate 413, and the other side thereof abuts against the heat dissipation duct.

[0076] In this embodiment, in order to avoid direct air cooling on the sound-generating position in the installation cavity 415, thereby protecting the sound quality of the speaker, a heat exchange cavity 41 is provided to perform heat exchange on the installation cavity 415 inside the box body 2, and the heat of the heat exchange cavity 41 is taken away by the heat dissipation air duct, and then the heat in the installation cavity 415 is taken away by heat exchange through the heat exchange cavity 41. By lowering the ambient temperature of the installation cavity 415, a headphone audio system with a double-sided magnetic circuit unit in the installation cavity 415 is dissipated and cooled.

[0077] The heat exchange chamber 41 ensures the stability of the heat exchange process through the spacing of the contact plates 413, and can also prevent the rapid temperature change in the top corner heat dissipation channel 4 from causing excessive impact on the installation chamber 415 through the spacing of the contact plates 413, thereby retaining a buffer zone.

[0078] The heat dissipation air duct includes a main air duct 45, which extends to the front of the box body 2 and has an air inlet 42. A side branch air duct 46 is provided in the main air duct 45, and a side branch air duct 48 is provided in the side branch air duct 46. A gas collecting cavity 44 is provided on the side of the side branch air duct 48, and a gas collecting pipe 43 is provided in the gas collecting cavity 44. One end of the gas collecting pipe 43 is connected to the gas collecting cavity 44, and the other end thereof is connected to the main air duct 45.

[0079] The main air duct 45 extends toward the back of the box 2 and is connected to a narrow air duct 411. The main air duct 45 is provided with a plurality of anti-return baffles 47 near the narrow air duct 411. The anti-return baffles 47 are parallel to each other. A anti-return block 49 is provided at the entrance of the narrow air duct 411. The anti-return block 49 protrudes into the narrow air duct 411.

[0080] The narrow air duct 411 extends toward the back of the box body 2 and is connected to an exhaust opening 412, and the exhaust opening 412 is communicated with the outside;

[0081] A fan 414 is provided at the outlet of the narrow tube air duct 411 .

[0082] In this embodiment, the main air duct 45 is used for ventilation and heat dissipation. When the fan 414 is turned on, air enters the main air duct 45 from the air inlet 42. Under the action of the side branch air duct 48 of the side branch air duct 46, the integrity and continuity of the airflow entering the heat dissipation air duct can be destroyed through the connection between the air collecting cavity 44 and the air collecting pipe 43, thereby effectively avoiding the howling caused by the rapid circulation of air and reducing the impact on the sound of the speaker.

[0083] The narrow tube air duct 411 in this embodiment accelerates air circulation by narrowing its diameter, thereby taking away more heat per unit time and accelerating the heat dissipation of the heat exchange plate 410 in the heat exchange chamber 41, so as to more effectively adjust the temperature in the installation chamber 415 of the box body 2. In order to avoid flow blockage caused by air backflow, in this embodiment, a non-return baffle 47 and a non-return block 49 are provided to avoid air backflow. Compared with a one-way valve, the non-return baffle 47 and the non-return block 49 can increase the flow of fluid and also achieve a better non-return effect.

[0084] The diameter of the exhaust opening 412 behind the narrow air duct 411 is enlarged, which is more conducive to the exhaust of air from the heat dissipation channel and avoids the phenomenon of flow blockage, which affects the heat dissipation effect.

[0085] 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 double-sided magnetic circuit unit, comprising a box body (2), characterized in that: The box (2) is provided with a mounting cavity (415), and a headphone sound system with a double-sided magnetic circuit unit is mounted in the mounting cavity (415); the mounting base of the headphone sound system with a double-sided magnetic circuit unit passes through the bottom of the box (2) and extends outside the box (2); A plurality of top corner heat dissipation channels (4) are provided on the box body (2), and the top corner heat dissipation channels (4) penetrate from the front side of the box body (2) to the back side of the box body (2); The top corner heat dissipation channel (4) comprises a heat exchange chamber (41) and a heat dissipation air duct, the heat dissipation air duct comprising a main air duct (45), the main air duct (45) extending to the front of the box body (2) and having an air inlet (42), a side branch air duct (46) being provided in the main air duct (45), a side branch air duct (48) being provided in the side branch air duct (46), an air collecting chamber (44) being provided on the side of the side branch air duct (48), an air collecting pipe (43) being provided in the air collecting chamber (44), one end of the air collecting pipe (43) being in communication with the air collecting chamber (44), and the other end of the air collecting pipe (43) being in communication with the main air duct (45); The main air duct (45) extends toward the back side of the box body (2) and is connected to a narrow air duct (411); a plurality of anti-return baffles (47) are provided on the main air duct (45) near the narrow air duct (411); the anti-return baffles (47) are parallel to each other; and a anti-return block (49) is provided at the entrance of the narrow air duct (411); the anti-return block (49) protrudes into the narrow air duct (411); The earphone sound system with a double-sided magnetic circuit unit comprises a mounting base (1), a double-magnetic circuit sound-generating unit (3) is arranged on the mounting base (1), the double-magnetic circuit sound-generating unit (3) comprises a basin frame (33), a sound-generating system (32) is arranged in the basin frame (33), an upper cover (31) is arranged on the sound-generating system, and the sound-generating system (32) is located between the upper cover (31) and the basin frame (33); The sound generating system (32) comprises a dual magnetic circuit system and a vibration system, wherein the vibration system is nested in the dual magnetic circuit system; 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).

2. The earphone speaker with a double-sided magnetic circuit 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 double-sided magnetic circuit unit according to claim 1, characterized in that: The vibration system 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); The dual magnetic circuit system comprises an upper magnetic circuit (321) and a lower magnetic circuit (322), wherein the upper magnetic circuit (321) is located 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 magnetic circuit (321) and the upper voice coil (322), and the lower magnetic circuit (326) is located 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 magnetic circuit (326) and the lower voice coil (324).

4. The earphone speaker with a double-sided magnetic circuit 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 double-sided magnetic circuit 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 generation system (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 system (32) through the through hole (334).

6. The earphone speaker with a double-sided magnetic circuit 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 double-sided magnetic circuit unit according to claim 1, characterized in that: The heat exchange cavity (41) is arranged in parallel with the heat dissipation air duct, and the heat exchange cavity (41) is close to the installation cavity (415).

8. The earphone speaker with a double-sided magnetic circuit unit according to claim 7, characterized in that: The heat exchange cavity (41) comprises a contact plate (413), wherein the contact plate (413) completely covers the contact surface of the installation cavity (415) and fits the installation cavity (415), and a plurality of heat exchange plates (410) are arranged in the heat exchange cavity (41), wherein one side of the heat exchange plate (410) abuts against the contact plate (413) and the other side thereof abuts against the heat dissipation air duct.

9. The earphone speaker with a double-sided magnetic circuit unit according to claim 7, characterized in that: The narrow air duct (411) extends toward the back of the box (2) and is connected to an exhaust opening (412), wherein the exhaust opening (412) is in communication with the outside; A fan (414) is provided at the outlet of the narrow tube air duct (411).

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