A speaker and headphones

Abstract

This application discloses a loudspeaker and headphones, comprising a housing, a magnetic circuit system, and a vibration system. The housing has a receiving cavity; the vibration system is disposed within the receiving cavity and includes a diaphragm and a planar voice coil connected to the diaphragm, the diaphragm being connected to the housing; the magnetic circuit system is disposed within the receiving cavity and located on the side of the diaphragm near the planar voice coil, the magnetic circuit system including a plurality of spaced magnets, with a magnetic gap formed between adjacent magnets, a magnetic conductor disposed on the side of the magnets near the diaphragm, and a magnetic collecting cavity formed between adjacent magnetic conductors, the magnetic conductor being used to concentrate the magnetic field in the magnetic collecting cavity; wherein at least a portion of the planar voice coil is located in the magnetic collecting cavity. The embodiments of this application can optimize the high-frequency sensitivity of the loudspeaker.

Description

Technical Field

[0001] This application relates to the field of acoustic device technology, and more particularly to a loudspeaker and headphones. Background Technology

[0002] With the development of society, loudspeakers are being used more and more widely in various audio and information communication devices. Consumers are also demanding more and more high-frequency sound. However, in related technologies, many loudspeakers have low high-frequency sensitivity. Utility Model Content

[0003] This application provides a speaker and headphones that can improve the sensitivity of the speaker in the tweeter unit.

[0004] In a first aspect, embodiments of this application provide a loudspeaker, including:

[0005] The shell has a receiving cavity;

[0006] A vibration system is disposed in the receiving cavity, the vibration system including a diaphragm and a planar voice coil connected to the diaphragm, the diaphragm being connected to the housing;

[0007] A magnetic circuit system is disposed in the receiving cavity and located on the side of the diaphragm near the planar voice coil. The magnetic circuit system includes a plurality of magnets spaced apart, with a magnetic gap formed between two adjacent magnets. A magnetic conductor is disposed on the side of the magnet near the diaphragm, and a magnetic collecting cavity is formed between two adjacent magnetic conductors. The magnetic conductor is used to concentrate the magnetic field in the magnetic collecting cavity.

[0008] At least a portion of the planar voice coil is located within the magnetic collection cavity.

[0009] Secondly, embodiments of this application also provide an earphone, including a main body and a speaker as described in the above embodiments, wherein the speaker is disposed inside the main body.

[0010] Based on the speaker and headphones in this embodiment, this embodiment, by setting a magnetic guide above the magnet, allows the magnetic guide to converge the free and dispersed magnetic lines of force outside the magnetic gap, thereby enhancing the magnetic field strength in the magnetic cavity region. Under the action of a strong magnetic field, the planar voice coil can more sensitively drive the diaphragm to vibrate, thus significantly improving the speaker's sound quality performance in the high-frequency range, i.e., optimizing the speaker's high-frequency sensitivity. Moreover, the setting of the magnetic guide can also optimize the magnetic field distribution, improve the utilization rate of the magnetic field, effectively reduce magnetic energy loss, and improve the coupling efficiency between the planar voice coil and the magnetic field. At the same time, the magnetic guide is located between the magnet and the diaphragm, and at least a portion of the planar voice coil is located in the magnetic cavity between two adjacent magnetic guides, making the overall structure of the speaker compact, reducing internal space loss, and thus reducing the size of the speaker. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the first-view structure of a loudspeaker in one embodiment of this application;

[0013] Figure 2 This is a cross-sectional structural diagram of a loudspeaker in one embodiment of this application;

[0014] Figure 3 This is a schematic diagram of the second-view structure of the loudspeaker in one embodiment of this application;

[0015] Figure 4 This is a schematic diagram of the exploded structure of a loudspeaker in one embodiment of this application.

[0016] Figure label:

[0017] 1. Speaker;

[0018] 10. Shell; 11. Receiving cavity; 111. First cavity; 112. Second cavity; 12. Sound outlet; 13. Pressure relief hole; 14. First side surface;

[0019] 20. Magnetic circuit system; 21. Magnet; 211. Magnetic gap; 212. First end; 213. Second end; 22. Magnetic conductor; 221. Magnetic collecting cavity;

[0020] 30. Vibration system; 31. Diaphragm; 32. Planar voice coil;

[0021] 41. Circuit board; 42. Frequency divider capacitor;

[0022] 50. Bracket;

[0023] L1, first direction; L2, second direction. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, a clear and complete description will be provided below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] With the development of society, loudspeakers are being used more and more widely, and consumers are demanding more and more high-frequency sound from loudspeakers. This requires loudspeakers to have a highly compliant vibration system, a higher BL value, and a larger amplitude. There is an urgent need for a loudspeaker that can have higher high-frequency sensitivity in the high-frequency range.

[0026] Regarding the above situation, firstly, please refer to [link / reference needed]. Figures 1-4 This application proposes a loudspeaker 1, including a housing 10, a magnetic circuit system 20, and a vibration system 30. The housing 10 has a receiving cavity 11. The vibration system 30 is disposed in the receiving cavity 11 and is located on one side of the magnetic circuit system 20. The vibration system 30 includes a diaphragm 31 and a planar voice coil 32. The diaphragm 31 is spaced apart from a magnetic conductor 22, and the edge of the diaphragm 31 is connected to the housing 10. The planar voice coil 32 is connected to the diaphragm 31. The magnetic circuit system 20 is disposed in the receiving cavity 11 and is located on the side of the diaphragm 31 near the planar voice coil 32. The magnetic circuit system 20 includes a plurality of spaced magnets 21. A magnetic gap 211 is formed between two adjacent magnets 21. A magnetic conductor 22 is disposed on the side of the magnet 21 near the diaphragm 31. A magnetic collecting cavity 221 is formed between two adjacent magnetic conductors 22. The magnetic conductor 22 is used to concentrate the magnetic field in the magnetic collecting cavity 221. At least a portion of the planar voice coil 32 is located in the magnetic collecting cavity 221.

[0027] The housing 10 provides the design basis and installation space for the magnetic circuit system 20 and the vibration system 30. The housing 10 can be made of high-strength metal material to ensure structural stability. The housing 10 may include an upper U-shaped shell and a lower U-shaped shell, which are connected by precision snap-fit ​​to form a closed receiving cavity 11, simplifying the structure of the housing 10, thereby speeding up the assembly process and improving production efficiency.

[0028] Specifically, two adjacent magnets 21 can collaboratively generate a magnetic field at the magnetic gap 211. The magnetic field strength is significant in the region near the magnetic gap 211, while it gradually weakens in the region farther away. Since the magnetic gap 211 is connected to the magnetic collecting cavity 221, and the magnetic conductor 22 is higher than the magnets 21, the magnetic collecting cavity 221 is formed above the magnetic gap 211. Therefore, the magnetic lines of force dispersed from the magnetic gap 211 can be converged into the magnetic collecting cavity 221 by the magnetic conductor 22, thereby increasing the magnetic field strength in the region of the magnetic collecting cavity 221. The planar voice coil 32 is inserted into the magnetic collecting cavity 221, and the planar voice coil 32 can be subjected to a stronger magnetic field in the magnetic collecting cavity 221. In other words, the magnetic conductor 22 can effectively guide the distribution of magnetic lines of force, ensuring that the planar voice coil 32 is always in the optimal magnetic field environment during vibration. The number of magnetic conductors 22 provided on each magnet 21 can be flexibly adjusted according to the size of the magnet 21 and the magnetic field requirements to ensure that the magnetic field utilization rate of each magnet 21 is maximized.

[0029] The planar voice coil 32 is tightly connected to the diaphragm 31. When the planar voice coil 32 vibrates under the influence of a magnetic field, it can drive the diaphragm 31 to vibrate synchronously. The vibration of the diaphragm 31 is transmitted into the air, forming sound waves. The top of the planar voice coil 32 can be directly glued to the diaphragm 31. The glue includes, but is not limited to, solvent-based glue, UV glue, etc. The specific sound-producing principle of the speaker 1 has been disclosed in relevant technologies and will not be elaborated here.

[0030] It should be noted that magnetic lines of force can be generated between the magnets 21. If the magnetic conductor 22 is not provided above the magnets 21, the magnetic lines of force outside the magnetic gap 211 will dissipate into the surrounding space, resulting in a smaller magnetic field strength outside the magnetic gap 211. When this magnetic field acts on the planar voice coil 32, the effect is weakened, resulting in a smaller driving force generated by the planar voice coil 32, and a smaller sound emitted by the diaphragm 31. This leads to a reduction in magnetic field utilization and affects the sound production efficiency of the speaker 1. In this embodiment, by providing a magnetic guide 22 above the magnet 21, the magnetic guide 22 can converge the free and dispersed magnetic lines of force outside the magnetic gap 211, thereby enhancing the magnetic field strength in the magnetic collection cavity 221 region. Under the action of a strong magnetic field, the planar voice coil 32 can more sensitively drive the diaphragm 31 to vibrate, thus significantly improving the sound quality performance of the speaker 1 in the high-frequency range, i.e., optimizing the high-frequency sensitivity of the speaker 1. Moreover, the setting of the magnetic guide 22 can also optimize the magnetic field distribution, improve the utilization rate of the magnetic field, effectively reduce magnetic energy loss, and improve the coupling efficiency between the planar voice coil 32 and the magnetic field. At the same time, the magnetic guide 22 is located between the magnet 21 and the diaphragm 31, and at least a portion of the planar voice coil 32 is located in the magnetic collection cavity 221 between two adjacent magnetic guides 22, making the overall structure of the speaker 1 compact, reducing internal space loss, and thus reducing the size of the speaker 1.

[0031] It should also be noted that the speaker 1 also includes a circuit board 41 and a crossover capacitor 42. The circuit board 41 is connected to the housing 10, and the crossover capacitor 42 is electrically connected to the circuit board 41. The crossover capacitor 42 can effectively separate audio signals of different frequency bands, ensure accurate transmission of high-frequency signals, improve the high-frequency response performance of the speaker 1, and reduce distortion. The circuit board 41 integrates an audio processing chip, which can achieve efficient energy conversion and improve the overall sound performance of the speaker 1 by precisely controlling the vibration of the planar voice coil 32.

[0032] In some embodiments, such as Figure 1As shown, the edge of the diaphragm 31 is connected to the inner wall of the housing 10 via the bracket 50. The bracket 50 better ensures the sealing between the diaphragm 31 and the housing 10, improves the stability of the speaker 1 in complex environments, reduces resonance, and ensures pure and efficient sound transmission. The bracket 50 is made of lightweight material, reducing the overall weight, which not only lightens the overall burden on the speaker 1 but also improves its durability and lifespan. In addition, the planar voice coil 32 can be wound with high-purity copper wire, reducing resistance, improving response speed, and ensuring that high-frequency signals are not distorted.

[0033] In some embodiments, such as Figure 2 As shown, the magnet 21 has a first end 212 and a second end 213 disposed opposite to each other. The magnetic conductor 22 is disposed at the first end 212. The first end 212 and the second end 213 have different polarities. The first ends 212 of two adjacent magnets 21 have different polarities, and the second ends 213 of two adjacent magnets 21 have different polarities.

[0034] Specifically, taking two magnets 21 arranged side-by-side as an example, if the first end 212 of the left magnet 21 is the N pole, then the first end 212 of the right magnet 21 is the S pole; if the second end 213 of the left magnet 21 is the S pole, then the second end 213 of the right magnet 21 is the N pole. The magnetic conductor 22, after contacting the first end 212 of the magnet 21, can have the same polarity as the first end 212. Therefore, when the first end 212 is the S pole, the magnetic conductor 22 in contact with the first end 212 is the S pole; when the first end 212 is the N pole, the magnetic conductor 22 in contact with the first end 212 is the N pole.

[0035] For example, such as Figure 2 As shown, the upper part of the magnet 21 is the first end 212, and the lower part of the magnet 21 is the second end 213. There are three magnets 21 and three magnetic conductors 22. Each magnet 21 has one magnetic conductor 22 on its upper part. At this time, the three magnets 21 are arranged as the first magnet, the second magnet, and the third magnet. The first end 212 of the first magnet is the N pole, and the second end 213 of the first magnet is the S pole. The magnetic conductor 22 in contact with the first end 212 of the first magnet is the N pole. The first end 212 of the second magnet is the S pole, and the second end 213 of the second magnet is the N pole. The magnetic conductor 22 in contact with the first end 212 of the second magnet is the S pole. The first end 212 of the third magnet is the N pole, and the second end 213 of the third magnet is the S pole. The magnetic conductor 22 in contact with the first end 212 of the third magnet is the N pole.

[0036] Please see Figure 2In some embodiments of this application, the diaphragm 31 divides the receiving cavity 11 into a first cavity 111 and a second cavity 112, and the magnetic circuit system 20 is located in the second cavity 112; the housing 10 also has a sound outlet 12 and a pressure relief hole 13 arranged opposite to each other, the sound outlet 12 is connected to the first cavity 111, and the pressure relief hole 13 is connected to the second cavity 112.

[0037] Specifically, the sound outlet 12 is used to provide a smooth output of sound waves, and the pressure relief hole 13 is used to balance the internal air pressure, reduce sound wave interference, so that the air pressure in the upper and lower cavities of the speaker 1 is balanced, reducing the distortion caused by the air pressure imbalance, and improving the sensitivity of the speaker 1.

[0038] Further, please see Figure 1 In some embodiments of this application, the area of ​​the sound outlet 12 is s, where 0.1 mm2 ≤ s ≤ 3 mm2. By limiting the area of ​​the sound outlet 12, this embodiment enables the loudspeaker 1 to obtain the best acoustic performance in a specific frequency range.

[0039] In this embodiment, the dimensions of the sound outlet 12 can be defined according to actual needs to achieve better sound output and meet the sound quality requirements of different scenarios. For example, the shape of the sound outlet 12 can be rectangular, and the length and width of the sound outlet 12 are between 0.1mm and 3mm.

[0040] Alternatively, in some embodiments, please continue to refer to Figure 1 The housing 10 also has a first side 14 with a sound outlet 12. The distance from the sound outlet 12 to the edge of the first side 14 is d4, 0.1mm≤d4≤5mm, to ensure that the sound waves emitted through the sound outlet 12 are evenly diffused, reduce the edge diffraction effect, and improve the clarity of the sound quality. At the same time, the precise setting of d4 helps to optimize the sound wave transmission path, so that the speaker 1 can maintain relatively stable acoustic performance in different frequency bands.

[0041] The housing 10 can be a uniformly symmetrical shape, such as a cuboid, cylinder, or elliptical cylinder, to optimize the sound wave diffusion path, reduce acoustic reflection, and improve sound uniformity. In some embodiments, such as Figures 3-4 As shown, the housing 10 is cuboid, the magnetic circuit system 20 and the vibration system 30 are arranged along the axial direction M of the planar voice coil 32, the magnetic circuit system 20 extends along the first direction L1, and multiple magnets 21 are arranged at intervals along the second direction L2. The axial direction M of the planar voice coil 32, the first direction L1 and the second direction L2 are perpendicular to each other.

[0042] Specifically, based on the shape of the housing 10, the diaphragm 31 is correspondingly square to match the spatial layout of the inner cavity of the housing 10, ensuring the symmetry and consistency of sound wave propagation. For example, as... Figure 4As shown, the planar voice coil 32 is generally racetrack-shaped. The magnetic circuit system 20 includes three magnets 21, which are arranged at intervals along the second direction L2. Each magnet 21 is provided with a magnetic conductor 22. Two magnetic gaps 211 are formed between the three magnets 21, and two magnetic collecting cavities 221 are formed between the three magnetic conductors 22. A portion of the planar voice coil 32 is correspondingly disposed in each magnetic collecting cavity 221. The planar voice coil 32 is symmetrically distributed in the two magnetic collecting cavities 221 to ensure that the planar voice coil 32 is subjected to uniform force during vibration. That is, the longer side of the planar voice coil 32 extends along the first direction L1, and magnetic conductors 22 are provided on both opposite sides of the planar voice coil 32 along the second direction L2. Magnetic conductors 22 are also correspondingly disposed inside the hollow area of ​​the planar voice coil 32, thereby making the magnetic field distribution around the planar voice coil 32 more uniform, so as to improve the coupling efficiency between the planar voice coil 32 and the magnetic field. At the same time, it makes the overall structure of the speaker 1 more compact and reduces the size of the speaker 1.

[0043] In some embodiments of this application, the plurality of magnets 21 include annular magnets and a central magnet. The annular magnet is disposed around the central magnet, and there is an annular magnetic gap 211 between the annular magnet and the central magnet. A central magnetic guide is disposed on the side of the central magnet near the diaphragm 31, and an annular magnetic guide is disposed on the side of the annular magnet near the diaphragm 31. An annular magnetic collecting cavity 221 is formed between the central magnetic guide and the annular magnetic guide. The annular magnetic collecting cavity 221 is located above the annular magnetic gap 211, thereby enabling the magnetic guide 22 to optimize the magnetic field distribution, improve the utilization rate of the magnetic field, and effectively reduce magnetic energy loss.

[0044] Alternatively, in other embodiments, the plurality of magnets 21 include a first magnet, a second magnet, and a third magnet arranged sequentially at intervals, wherein the first magnet, the second magnet, and the third magnet are arranged at intervals along a second direction L2, a central magnetic guide is provided on the side of the second magnet near the diaphragm 31, and annular magnetic guides are provided on the side of the first magnet and the third magnet near the diaphragm 31, and an annular magnetic collecting cavity 221 is formed between the central magnetic guide and the annular magnetic guide.

[0045] Furthermore, such as Figure 2 As shown, the width of the magnetic gap 211 along the second direction L2 is d2, 0.08mm≤d2≤1.5mm. The width d2 of the magnetic gap 211 directly affects the vibration efficiency of the planar voice coil 32. If it is too wide or too narrow, the magnetic field utilization rate will decrease. In this embodiment, by precisely controlling the width d2 of the magnetic gap 211, the magnetic field strength is sufficient to provide magnetic field driving force for the planar voice coil 32, thereby improving the high-frequency sound quality of the speaker 1.

[0046] Understandably, if the size of the magnetic gap 211 is too large, it will result in a sparse distribution of magnetic field lines and a low magnetic energy density, thereby reducing the Lorentz force on the planar voice coil 32. If the size of the magnetic gap 211 is too small, the magnetic field lines will be too concentrated, which will easily lead to magnetic saturation and affect the vibration stability of the planar voice coil 32. At the same time, a small magnetic gap 211 will also increase the installation accuracy of the planar voice coil 32 and the magnet 21, increasing the assembly difficulty.

[0047] In some embodiments, such as Figure 2 As shown, the planar voice coil 32 is located outside the magnetic gap 211, so the size of the magnetic gap 211 is not limited by the size of the planar voice coil 32. This allows for a smaller magnetic gap 211, resulting in denser magnetic lines of force generated by the magnet 21. Furthermore, the external placement of the planar voice coil 32 avoids direct contact with the magnet 21 when it vibrates within the magnetic gap 211, thus reducing noise caused by friction between the planar voice coil 32 and the magnet 21, and improving the purity of the sound from the speaker 1. Simultaneously, the external placement of the planar voice coil 32 simplifies the assembly process, reduces the precision requirements for speaker 1 installation, and helps lower the overall production cost of the speaker 1.

[0048] Please continue reading Figure 2 In some embodiments of this application, the projected area of ​​the planar voice coil 32 on the diaphragm 31 covers the projected area of ​​the magnetic gap 211 on the diaphragm 31.

[0049] Understandably, as the coverage area of ​​the planar voice coil 32 increases, meaning its effective vibration area increases, the driving force exerted by the planar voice coil 32 on the diaphragm 31 under the influence of a magnetic field also increases. This causes the diaphragm 31 to generate stronger sound wave vibrations, thereby improving the sound pressure level and sound quality performance of the speaker 1. Furthermore, the close fit between the planar voice coil 32 and the diaphragm 31 ensures efficient energy transfer, reduces energy loss, and further enhances the high-frequency performance of the speaker 1. Simultaneously, the relative position of the planar voice coil 32 and the magnetic gap 211 allows the magnetic field in the magnetic gap 211 to be closer to the planar voice coil 32, meaning the planar voice coil 32 is located in a region with denser magnetic field lines, which helps improve the response sensitivity of the planar voice coil 32 to magnetic fields.

[0050] Please continue reading Figure 2In some embodiments of this application, the planar voice coil 32 is arranged parallel to the diaphragm 31. This means that the design of the planar voice coil 32 makes the force it experiences in the magnetic field more uniform. Simultaneously, the contact area between the planar voice coil 32 and the diaphragm 31 is larger, increasing the vibrational force generated by the voice coil 32 on the diaphragm 31, thereby making the sound emitted by the diaphragm 31 louder. The planar voice coil 32 can be formed by winding wire or printing conductive lines. The planar voice coil 32 can be a single-layer or multi-layer structure, and it can be circular, racetrack-shaped, rectangular, square, elliptical, or other shapes. The diverse shape design of the planar voice coil 32 can be selected according to the specific application scenario of the speaker 1 to achieve the best sound effect.

[0051] It should be noted that in related technologies, the magnetic circuit system 20 and the vibration system 30 need to be coaxially arranged. Since it is impossible to achieve the ideal state of zero concentricity during installation, the concentricity difference during the vibration of the diaphragm 31 leads to asymmetry in the vibration force, causing the planar voice coil 32 to drive the diaphragm 31 to become polarized. In this embodiment, because the contact area between the planar voice coil 32 and the diaphragm 31 is large and the thickness of the planar voice coil 32 is small, the influence of the concentricity difference on the vibration symmetry is effectively reduced. That is, by setting the planar voice coil 32, this embodiment can effectively reduce the phenomenon of polarization of the planar voice coil 32 in the direction perpendicular to the axial direction M of the planar voice coil 32, thereby improving the stability and clarity of the sound quality.

[0052] Furthermore, such as Figure 2 As shown, the thickness range of the planar voice coil 32 is d1, 0.1mm≤d1≤2mm. The thickness of the planar voice coil 32 refers to the length along its axial direction M. The planar voice coil 32 has a larger contact area with the diaphragm 31, which is beneficial to enhance the driving effect of the planar voice coil 32 on the diaphragm 31. At the same time, the thickness d1 of the planar voice coil 32 along its axial direction M is smaller, which is beneficial to reduce the gap between the diaphragm 31 and the magnet 21, thereby making the structure more compact. This allows the speaker 1 in this embodiment to achieve higher sound pressure output in a limited space, improving the overall sound performance. At the same time, the compact structural design makes it easy to integrate into various small-volume electronic devices, broadening the application range.

[0053] Please see Figure 3In some embodiments of this application, the minimum distance between the planar voice coil 32 and the magnet 21 along the axial direction M of the planar voice coil 32 is d3, where 0.05mm ≤ d3 ≤ 1mm. A smaller distance d3 between the planar voice coil 32 and the magnet 21 is beneficial for enhancing the response of the planar voice coil 32 to the magnetic field, and reducing the distance can also effectively reduce magnetic flux leakage and improve magnetic field utilization. However, if d3 is too small, it may cause frictional noise between the planar voice coil 32 and the magnet 21, affecting sound quality. Therefore, it is necessary to precisely control the range of d3 to ensure that the planar voice coil 32 can vibrate freely, while ensuring a balance between the vibration efficiency and sound quality of the planar voice coil 32.

[0054] Secondly, embodiments of this application also provide an earphone (not shown in the figure), including a main body (not shown in the figure) and a speaker 1 as described in any of the above embodiments. The speaker 1 is disposed inside the main body, and the main body provides installation space and support for the speaker 1.

[0055] The headphones can be open-back headphones. Specifically, the main body of the headphones can be composed of a front end, a connecting part, and a rear end connected in sequence. The front end includes a mounting cavity, a speaker 1, and a microphone. The connecting part includes titanium wire, conductive wire, soft silicone, and a hollow tube. The rear end includes a battery and a circuit board. The front end is connected to the connecting part through titanium wire, and the connecting part is then connected to the rear end to ensure that the structure is stable and flexible, making it easy for users to wear.

[0056] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0057] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A loudspeaker, characterized by include: The shell has a receiving cavity; A vibration system is disposed in the receiving cavity, the vibration system including a diaphragm and a planar voice coil connected to the diaphragm, the diaphragm being connected to the housing; A magnetic circuit system is disposed in the receiving cavity and located on the side of the diaphragm near the planar voice coil. The magnetic circuit system includes a plurality of magnets spaced apart, with a magnetic gap formed between two adjacent magnets. A magnetic conductor is disposed on the side of the magnet near the diaphragm, and a magnetic collecting cavity is formed between two adjacent magnetic conductors. The magnetic conductor is used to concentrate the magnetic field in the magnetic collecting cavity. At least a portion of the planar voice coil is located within the magnetic collection cavity.

2. The loudspeaker of claim 1, wherein, The magnet has a first end and a second end that are disposed opposite to each other. The magnetic conductor is disposed at the first end. The first end and the second end have different polarities. The first ends of two adjacent magnets have different polarities, and the second ends of two adjacent magnets have different polarities.

3. The loudspeaker of claim 1, wherein, The plurality of magnetic conductive elements include a central magnetic conductive element and an annular magnetic conductive element; The plurality of magnets includes a central magnet and an annular magnet, wherein the annular magnet is disposed around the periphery of the central magnet, the central magnetic conductor is disposed on the side of the central magnet closer to the diaphragm, and the annular magnetic conductor is disposed on the side of the annular magnet closer to the diaphragm; or, The plurality of magnets include a first magnet, a second magnet, and a third magnet arranged at intervals in sequence. The central magnetic conductor is disposed on the side of the second magnet near the diaphragm, and the annular magnetic conductor is disposed on the side of the first magnet and the third magnet near the diaphragm.

4. The loudspeaker of claim 1, wherein, The projected area of ​​the planar voice coil on the diaphragm covers the projected area of ​​the magnetic gap on the diaphragm.

5. The loudspeaker of claim 1, wherein, The planar voice coil is arranged parallel to the diaphragm.

6. The loudspeaker of claim 5, wherein, The thickness range of the planar voice coil is d1, where 0.1mm ≤ d1 ≤ 2mm.

7. The loudspeaker of claim 1, wherein, The magnetic circuit system and the vibration system are arranged along the axial direction of the planar voice coil. The magnetic circuit system extends along a first direction, and the plurality of magnets are arranged at intervals along a second direction. The axial direction of the planar voice coil, the first direction, and the second direction are perpendicular to each other.

8. The loudspeaker of claim 7, wherein, The width of the magnetic gap along the second direction is d2, 0.08mm≤d2≤1.5mm.

9. The loudspeaker of claim 1, wherein, The minimum distance between the planar voice coil and the magnet along the axial direction of the planar voice coil is d3, where 0.05mm≤d3≤1mm.

10. The loudspeaker of claim 1, wherein, The diaphragm divides the receiving cavity into a first cavity and a second cavity, and the magnetic circuit system is located in the second cavity; The housing also has a sound outlet and a pressure relief hole arranged opposite to each other. The sound outlet is connected to the first cavity, and the pressure relief hole is connected to the second cavity.

11. The loudspeaker of claim 10, wherein, The sound outlet hole has an area s, 0.1mm 2 ≤ s ≤ 3mm 2 ; and / or, The housing also has a first side surface for opening the sound outlet, and the distance from the sound outlet to the edge of the first side surface is d4, where 0.1mm≤d4≤5mm.

12. An earphone, characterized by It includes a main body and a speaker as described in any one of claims 1 to 11, wherein the speaker is disposed inside the main body.

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