Speaker and electronic device

Abstract

The application provides a loudspeaker and an electronic device. The loudspeaker comprises a vibration system, a diaphragm and a voice coil, the voice coil is fixed to the diaphragm; a magnetic circuit system is arranged at intervals with the vibration system, the magnetic circuit system comprises a magnetic circuit assembly and an upper magnetic conducting assembly, the upper magnetic conducting assembly is located on the side of the magnetic circuit assembly close to the diaphragm and is fixedly connected with the magnetic circuit assembly; an adjusting magnet is fixed to the vibration system, at least part of the adjusting magnet is located in the magnetic gap of the upper magnetic conducting assembly, the polarization direction of the adjusting magnet is parallel to the diaphragm, the adjusting magnet has a first end and a second end arranged at opposite sides in the polarization direction, the first end is closer to the upper magnetic conducting assembly than the second end, and repulsion is generated between the first end and the upper magnetic conducting assembly. The loudspeaker in the embodiment can have good low-frequency performance while meeting the stiffness requirement of the vibration system, and the swing of the voice coil during movement is small.

Description

Technical Field

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

[0002] Traditional loudspeaker designs typically consist of a vibration system and a magnetic circuit system. The vibration system includes a diaphragm and a voice coil mounted on the diaphragm. The magnetic circuit system provides a magnetic field to the location of the voice coil. When current is input to the voice coil, it experiences an Ampere force, causing it to deviate from its equilibrium position and reciprocate, thus driving the diaphragm to vibrate. During this process, the vibration system undergoes elastic deformation, generating a restoring force that resists this deformation. This restoring force suppresses the diaphragm's vibration, leading to an increase in the loudspeaker's resonant frequency and a decrease in its low-frequency performance.

[0003] Currently, the elastic restoring force of the vibration system is usually reduced by thinning the thickness of the surround structure on the diaphragm or by using a material with a lower Young's modulus to fabricate the surround structure on the diaphragm. However, this causes the voice coil to deflect or tilt left and right during its reciprocating motion, i.e., polarization occurs. This causes the voice coil to rub against the magnetic circuit components and produce noise, affecting the acoustic performance of the loudspeaker. Summary of the Invention

[0004] This application provides a loudspeaker and an electronic device including the loudspeaker, with the aim of providing a loudspeaker with small voice coil oscillation and good low-frequency performance, as well as an electronic device including the loudspeaker.

[0005] In a first aspect, a loudspeaker is provided. The loudspeaker includes a vibration system comprising a diaphragm and a voice coil, the voice coil being fixed to the diaphragm; a magnetic circuit system spaced apart from the vibration system, the magnetic circuit system comprising a magnetic circuit assembly and an upper magnetic guide assembly, the upper magnetic guide assembly being located on the side of the magnetic circuit assembly closer to the diaphragm and fixedly connected to the magnetic circuit assembly; and an adjustment magnet fixed to the vibration system, at least a portion of the adjustment magnet being located in the magnetic gap of the upper magnetic guide assembly, the adjustment magnet having a first end and a second end disposed opposite to each other, the first end being closer to the upper magnetic guide assembly than the second end, the first end generating a repulsive force with a portion of the upper magnetic guide assembly facing the first end, and the second end generating a repulsive force with a portion of the upper magnetic guide assembly facing the second end.

[0006] It is understood that in this embodiment, the loudspeaker has an adjusting magnet fixed to the vibration system. When the voice coil is in its equilibrium position, at least a portion of the adjusting magnet can be located within the magnetic gap of the upper magnetic guide assembly. The adjusting magnet has a first end and a second end disposed opposite to each other. The first end is closer to the upper magnetic guide assembly than the second end. The first end generates a repulsive force with the portion of the upper magnetic guide assembly facing the first end, and the second end generates a repulsive force with the portion of the upper magnetic guide assembly facing the second end. In other words, the polarity of the first end of the adjusting magnet is the same as the polarity of the portion of the upper magnetic guide assembly facing the first end. The polarity of the second end of the adjusting magnet is the same as the polarity of the portion of the upper magnetic guide assembly facing the second end. At this time, a repulsive force can be generated between the first end and the upper magnetic guide assembly. A repulsive force can also be generated between the second end and the upper magnetic guide assembly. The adjusting magnet can be subjected to a repulsive force from the upper magnetic guide assembly. As the absolute value of the displacement of the voice coil relative to its equilibrium position increases, the absolute value of the total repulsive force on the adjusting magnet also increases, and the two approximately satisfy a linear relationship, with a high degree of linearity. The direction of the total repulsive force on the adjusting magnet is opposite to the direction of the elastic restoring force of the vibration system itself. The total repulsive force on the adjusting magnet can act on the vibration system. Thus, the force exerted by the adjusting magnet on the vibration system (which in this embodiment is also the total repulsive force on the adjusting magnet) can be equivalent to an elastic component, and the elastic coefficient of this elastic component can be Km. At this time, the resonant frequency F0 of the loudspeaker can be:

[0007]

[0008] As can be seen from the above expression, when the total repulsive force acting on the adjusting magnet in this embodiment acts on the vibration system, it can offset at least a portion of the elastic restoring force of the vibration system itself in the speaker, thereby reducing the influence of the elastic restoring force of the vibration system itself on the diaphragm vibration. Thus, under the condition that the diaphragm thickness and material are exactly the same, the resonant frequency F0 of the speaker in this embodiment is smaller, and the speaker has better low-frequency performance. In other words, the speaker in this embodiment can have good low-frequency performance while meeting the stiffness requirements of the vibration system itself, with less oscillation during voice coil movement.

[0009] Secondly, compared to loudspeakers where the force exerted on the adjusting magnet by the upper magnetic guide assembly is attractive, in this embodiment, the force is repulsive. This effectively avoids the problem of the adjusting magnet sticking to the upper magnetic guide assembly and preventing the voice coil from moving properly when the distance between the adjusting magnet and the upper magnetic guide assembly is too close, which would cause the adjusting magnet to stick to the upper magnetic guide assembly. This helps ensure the normal operation of the loudspeaker. In other words, the distance between the adjusting magnet and the upper magnetic guide assembly in this embodiment can be smaller, which is beneficial for miniaturizing the loudspeaker.

[0010] In one possible implementation, the size of the adjusting magnet in a first direction is larger than the size of the magnetic gap of the upper magnetic guide assembly in the first direction, which is along the thickness direction of the diaphragm. This results in a larger adjusting magnet, leading to a greater repulsive force from the upper magnetic guide assembly. This increases the force exerted by the adjusting magnet on the vibration system, thus largely offsetting the elastic restoring force of the speaker's own vibration system, resulting in better low-frequency performance.

[0011] Secondly, compared to a smaller regulating magnet, the repulsive force from the first and second upper guiding magnets is smaller. When the voice coil moves a large displacement along the first or second direction, the regulating magnet is farther away from the first and second upper guiding magnets, causing the total repulsive force on the regulating magnet to decrease sharply. This results in a non-linear relationship between the total repulsive force on the regulating magnet and the voice coil displacement, indicating low linearity. However, in this embodiment, the regulating magnet is larger in the first direction. Even with a large displacement of the voice coil along the first or second direction, the regulating magnet remains closer to the first and second upper guiding magnets, allowing the relationship between the total repulsive force on the regulating magnet and the voice coil displacement to be closer to a linear one, resulting in higher linearity. In other words, by increasing the size of the regulating magnet in the first direction, the loudspeaker in this embodiment allows the total repulsive force on the regulating magnet to maintain a linear relationship with the voice coil displacement even when operating at high power and large amplitude, resulting in high linearity. In other words, the speaker in this embodiment can meet the high power requirements while improving low-frequency performance.

[0012] In one possible implementation, the distance between the surface of the adjusting magnet facing away from the diaphragm and the diaphragm is a first distance, and the distance between the surface of the voice coil facing away from the diaphragm and the diaphragm is a second distance, wherein the first distance is less than or equal to the second distance. In this way, in the thickness direction of the diaphragm, the lower surface of the adjusting magnet (i.e., the surface of the adjusting magnet facing away from the diaphragm) will not exceed the lower surface of the voice coil (i.e., the surface of the voice coil facing away from the diaphragm), thereby preventing collisions with other components of the adjusting magnet when the voice coil moves in the direction away from the diaphragm, which could affect the normal operation of the speaker.

[0013] In one possible implementation, the upper magnetic conductor assembly includes a first upper magnetic conductor and a second upper magnetic conductor. The second upper magnetic conductor surrounds the first upper magnetic conductor and is spaced apart from the first upper magnetic conductor. The gap between the first and second upper magnetic conductors constitutes at least a portion of the magnetic gap of the upper magnetic conductor assembly. An adjusting magnet is fixedly connected to the side of the voice coil. At least a portion of the adjusting magnet is located between the first and second upper magnetic conductors. The portion of the adjusting magnet facing the first upper magnetic conductor repels the portion of the first upper magnetic conductor facing the adjusting magnet.

[0014] It is understandable that, when the voice coil is stationary, the adjusting magnet, the first upper guiding magnet that provides repulsive force to the adjusting magnet, and the second upper guiding magnet in this embodiment are arranged to the left, center, and right, relative to the thickness direction of the diaphragm. The arrangement of these three is perpendicular to the direction of voice coil movement (i.e., perpendicular to the thickness direction of the diaphragm). Thus, when the voice coil is energized and moves, the adjusting magnet has a relatively small impact on the amplitude of the voice coil; the amplitude of the voice coil is only limited by the distance between the voice coil and other components of the loudspeaker in its direction of movement. In other words, the loudspeaker in this embodiment can achieve high amplitude and high power operation, which is beneficial for improving the acoustic performance of the loudspeaker.

[0015] In one possible implementation, the adjusting magnet includes a first part and a second part spaced apart, both of which are fixedly connected to the side of the voice coil facing the first upper magnet, or both of which are fixedly connected to the side of the voice coil facing the second upper magnet. This results in a smaller size and mass for the adjusting magnet, thus preventing excessive mass from pulling on the voice coil and affecting its normal operation.

[0016] In one possible implementation, the upper magnetic guide assembly is provided with a first clearance groove, the opening of which faces the adjusting magnet, and at least a portion of the adjusting magnet is located within the first clearance groove. By providing the first clearance groove to avoid the adjusting magnet, the adjusting magnet can still utilize the space within the upper magnetic guide assembly, resulting in a more compact overall speaker structure and facilitating miniaturization of the speaker.

[0017] In one possible implementation, the upper magnetic conductor assembly includes a first upper magnetic conductor and a second upper magnetic conductor. The second upper magnetic conductor surrounds the first upper magnetic conductor and is spaced apart from it. The first upper magnetic conductor has a first clearance hole that penetrates the surface of the first upper magnetic conductor facing the diaphragm and the surface of the first upper magnetic conductor facing away from the diaphragm. The first clearance hole forms part of the magnetic gap of the upper magnetic conductor assembly. The loudspeaker also includes a connecting bracket located inside the voice coil and fixedly connected to the diaphragm. An adjusting magnet is fixedly connected to the connecting bracket. At least a portion of the adjusting magnet is located in the first clearance hole, and the portion of the adjusting magnet facing the first upper magnetic conductor repels the portion of the first upper magnetic conductor facing the adjusting magnet.

[0018] Understandably, compared to fixing the adjusting magnet to the side of the voice coil, when the speaker's operating power is high, the current in the voice coil increases, causing the voice coil to heat up and its temperature to rise. As the voice coil temperature rises, the high temperature can cause the adjusting magnet in contact with the voice coil to demagnetize, reducing the linearity between the total repulsive force on the adjusting magnet and the displacement of the voice coil, thus affecting the speaker's low-frequency performance. In this embodiment, by fixing the adjusting magnet to the connecting bracket connected to the diaphragm, and providing clearance holes in the first upper magnet and the first magnet to avoid the connecting bracket and the adjusting magnet fixed to the connecting bracket, the high temperature of the adjusting magnet caused by the voice coil heating and the resulting demagnetization can be effectively avoided. This allows the speaker to meet high power requirements while still maintaining good low-frequency performance.

[0019] In one possible implementation, the loudspeaker further includes a lower magnet, a central support, a first magnetic element, and a second magnetic element. The lower magnet is fixedly connected to the surface of the magnetic circuit assembly facing away from the upper magnet assembly. The magnetic circuit assembly has a second clearance hole that communicates with the first clearance hole. At least a portion of the lower magnet is exposed relative to the second clearance hole. The first magnetic element is fixedly connected to the diaphragm. The second magnetic element is fixedly connected to the surface of the lower magnet facing the second clearance hole. The central support is connected between the first magnetic element and the second magnetic element. At least a portion of the adjustment magnet is located between the first upper magnet and the central support. The first magnetic element and the adjustment magnet attract each other. The second magnetic element and the adjustment magnet also attract each other.

[0020] Understandably, when the voice coil amplitude is large, the displacement of the voice coil along the thickness direction of the diaphragm is large, and the distance between the adjusting magnet and the first upper guiding magnet is large, the total repulsive force on the adjusting magnet will decrease sharply. This causes the force exerted by the adjusting magnet on the vibration system to no longer satisfy a linear relationship with the displacement of the voice coil, resulting in low linearity. In this embodiment, a first magnetic component and a second magnetic component are respectively installed at both ends of the central support. Both the first and second magnetic components can generate an attractive force with the adjusting magnet. At this time, the force exerted by the adjusting magnet on the vibration system can be the sum of the total repulsive force (i.e., the repulsive force of the upper guiding magnet assembly) and the attractive force (from the magnetic components) exerted by the adjusting magnet on the magnetic magnet assembly. Thus, even if the displacement of the voice coil along the thickness direction of the diaphragm is large, and the distance between the adjusting magnet and the first upper guiding magnet is large, causing a sharp decrease in the total repulsive force on the adjusting magnet, the total attractive force can compensate for the sharply decreased total repulsive force, allowing the force exerted by the adjusting magnet on the vibration system to maintain a linear relationship with the displacement of the voice coil. In other words, the speaker in this embodiment can meet the high power requirements while improving low-frequency performance.

[0021] Furthermore, in this embodiment, the polarization direction of the adjusting magnet is parallel to the diaphragm. Even when the adjusting magnet moves with the voice coil in the direction away from the diaphragm and approaches the lower conductor magnet, the forces exerted by the lower conductor magnet on the first and second ends of the adjusting magnet are equal in magnitude and opposite in direction. This effectively avoids the lower conductor magnet generating additional repulsive or attractive forces on the adjusting magnet, which could affect the normal operation of the speaker.

[0022] In one possible implementation, the first magnetic element is a soft magnet; or, the first magnetic element is a permanent magnet, the polarization direction of the first magnetic element is parallel to the thickness direction of the diaphragm, and the polarity of the portion of the first magnetic element facing the central support is opposite to the polarity of the portion of the adjusting magnet facing the central support.

[0023] Understandably, given the same dimensions of the first magnetic component, when the first magnetic component is a soft magnet, its mass is smaller, which helps reduce the overall mass of the speaker and facilitates a lightweight design. Conversely, when the first magnetic component is a permanent magnet, its coercivity is stronger, making it less susceptible to the influence of magnetic fields from other components inside the speaker, thus ensuring the attractive force between the first magnetic component and the adjustment magnet.

[0024] In one possible implementation, the distance from the first magnetic element to the second end of the adjusting magnet is equal to the distance from the second magnetic element to the second end of the adjusting magnet. In this way, when the voice coil is in its balanced position, the attractive forces exerted by the first magnetic element on the adjusting magnet and the attractive forces exerted by the second magnetic element on the adjusting magnet are equal in magnitude and opposite in direction, meaning they can cancel each other out. This prevents the first and second magnetic elements from exerting forces on the adjusting magnet, which could cause the voice coil's balanced position to deviate from its designed position and affect the normal operation of the loudspeaker.

[0025] In one possible implementation, the diaphragm includes a vibrating portion and a folded ring portion. The vibrating portion is annular, and the folded ring portion connects the inner periphery of the vibrating portion to a first magnetic element. Thus, compared to a diaphragm without a folded ring portion where the first magnetic element is directly fixed to the vibrating portion, in this embodiment, the vibrating portion of the diaphragm can be indirectly connected to the first magnetic element through the folded ring portion, making the vibrating portion easier to vibrate and improving the acoustic performance of the loudspeaker.

[0026] In one possible implementation, the connecting bracket is made of a non-magnetic material. This avoids the connecting bracket affecting the magnetic field inside the speaker and thus preventing it from interfering with the speaker's normal operation.

[0027] In one possible implementation, the projection of the adjusting magnet onto the plane containing the upper magnetic conductor assembly is symmetrically arranged about the center of the upper magnetic conductor assembly. This ensures that the sum of the horizontal components of the repulsive forces exerted on the adjusting magnet by the first and second upper magnetic conductors is constant, thereby preventing the adjusting magnet from generating a horizontal component force on the voice coil, which could cause the voice coil to deflect and affect the normal operation of the loudspeaker.

[0028] In one possible implementation, when no current is input to the voice coil, the force exerted by the adjusting magnet on the vibrating system is zero. When current is input to the voice coil, the direction of the force exerted by the adjusting magnet on the vibrating system is opposite to the direction of the vibrating system's own elastic restoring force. In this way, the force exerted by the adjusting magnet on the vibrating system is opposite to the vibrating system's own elastic restoring force, thereby canceling out at least part of the vibrating system's elastic restoring force and improving the low-frequency performance of the loudspeaker.

[0029] Secondly, an electronic device is provided. The electronic device includes a device housing and the aforementioned speaker, with the speaker disposed inside the device housing. The speaker in this embodiment of the electronic device can achieve good low-frequency performance while meeting the stiffness requirements of the vibration system itself, with minimal oscillation during voice coil movement. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0031] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0032] Figure 2 yes Figure 1 A schematic diagram of the speaker of the electronic device shown in one embodiment;

[0033] Figure 3 yes Figure 2 The diagram shown is an exploded view of the loudspeaker in some embodiments.

[0034] Figure 4 yes Figure 2 The diagram shows the exploded structure of the magnetic circuit system.

[0035] Figure 5 yes Figure 4 The diagram shows the assembly structure of the magnetic circuit system.

[0036] Figure 6 yes Figure 2 The diagram shows a partial cross-sectional structure of the loudspeaker in one embodiment, cut along point AA.

[0037] Figure 7 yes Figure 3 The diagram shows the exploded structure of the support component and the circuit board.

[0038] Figure 8 yes Figure 7 A schematic diagram of the assembly structure shown from another perspective;

[0039] Figure 9 yes Figure 2 The diagram shows a partial cross-sectional structure of the loudspeaker in one embodiment, cut along point AA.

[0040] Figure 10 yes Figure 2 A schematic diagram of the assembly structure of the vibration system and the regulating magnet shown from another perspective;

[0041] Figure 11 yes Figure 3 A schematic diagram of the assembly structure of the vibration system, regulating magnet, support components, and circuit board shown from another perspective;

[0042] Figure 12 yes Figure 2 The diagram shows a partial cross-sectional structure of the loudspeaker in one embodiment, cut along point AA.

[0043] Figure 13 yes Figure 3 The diagram shows a partial structural assembly of the loudspeaker.

[0044] Figure 14 yes Figure 13 A schematic diagram of the structure shown from another perspective;

[0045] Figure 15a yes Figure 2 The diagram shows a cross-sectional structure of the loudspeaker cut along point AA in one embodiment.

[0046] Figure 15b yes Figure 15a The structure shown conceals a cross-sectional view of the shell.

[0047] Figure 16 yes Figure 14 The diagram shows a cross-sectional view of the speaker when the voice coil is in the equilibrium position.

[0048] Figure 17 yes Figure 14 The diagram shows a cross-sectional view of the speaker's voice coil at one of the following moments when the first current is input.

[0049] Figure 18 yes Figure 14The diagram shows a cross-sectional view of the speaker's voice coil at one of the following moments when a second current is input.

[0050] Figure 19 yes Figure 14 The diagram shows a simulation curve of the voice coil displacement of the loudspeaker and the repulsive force of the upper magnetic guide assembly on the adjustment magnet.

[0051] Figure 20 yes Figure 14 The above is a simulation diagram of the frequency response curves of a loudspeaker and a typical loudspeaker unit.

[0052] Figure 21 yes Figure 14 The diagram shows a partial cross-sectional structure of the loudspeaker from another perspective in another embodiment.

[0053] Figure 22 yes Figure 21 The diagram shows a cross-sectional view of the loudspeaker in another embodiment;

[0054] Figure 23 yes Figure 22 The diagram shows a cross-sectional view of the loudspeaker in another embodiment. Detailed Implementation

[0055] The embodiments of this application are described below with reference to the accompanying drawings.

[0056] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to at least two.

[0057] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0058] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0059] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in another embodiment" appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0060] It is understood that the specific embodiments described herein are merely for explaining the relevant invention and not for limiting the invention. It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0061] Figure 1 This is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of this application.

[0062] like Figure 1 As shown, electronic device 1000 can be a mobile phone, tablet computer, multimedia player, headphones, speaker, laptop computer, in-vehicle equipment, foldable terminal device, television, or wearable device, or other devices with speakers and / or microphones. Wearable devices can include smart bracelets, smartwatches, smart headsets, smart glasses, etc. Figure 1 The electronic device 1000 of the embodiment shown is illustrated using a mobile phone as an example.

[0063] For example, the electronic device 1000 may include a speaker 100, a device housing 200, and a display screen 300. The device housing 200 may include a frame 201 and a back cover 202, the frame 201 being connected to and surrounding the back cover 202. The frame 201 is provided with a sound outlet 203. The number of sound outlets 203 may be one or more. Figure 1 The diagram shows multiple sound outlets 203. In other embodiments, the sound outlets 203 may also be located on the rear cover 202.

[0064] For example, the display screen 300 can be fixed to the frame 201. The display screen 300, together with the frame 201 and the back cover 202, can enclose the interior of the electronic device 1000. The display screen 300 can be an organic light-emitting diode (OLED) display screen, an active matrix organic light-emitting diode, or a liquid crystal display (LCD), etc.

[0065] For example, the speaker 100 may be located inside the electronic device 1000. Wherein, Figure 1 The speaker 100 is indicated by a dashed line. The speaker 100 can play sound to the outside of the electronic device 1000 through the sound outlet 203. In other embodiments, the electronic device 1000 may also include multiple speakers 100, which can be used to emit multiple audio tracks to form stereo sound. It should be noted that... Figure 1 Only some components of the electronic device 1000 are shown schematically; the actual shape and size of these components are not subject to change. Figure 1 As defined in the accompanying drawings below. It should be understood that when the electronic device 1000 is in other forms, the electronic device 1000 may not include the display screen 300, or the electronic device 1000 may include multiple display screens 300.

[0066] The above text describes the relevant settings of the speaker 100 in the electronic device 1000. The following text will describe the specific structure of the speaker 100 in conjunction with the relevant accompanying drawings.

[0067] Figure 2 yes Figure 1 The speaker 100 of the electronic device 100 shown is a structural schematic diagram in one embodiment. Figure 3 yes Figure 2 The speaker 100 shown is an exploded structural diagram in some embodiments.

[0068] like Figure 2 and Figure 3 As shown, the loudspeaker 100 may include a housing 10, a vibration system 20, a magnetic circuit system 30, a circuit board 40, a support member 50, and an adjustment magnet 61. The vibration system 20 may include a diaphragm 21 and a voice coil 22. The magnetic circuit system 30 may include a first magnet 31, a second magnet 32, a first upper conducting magnet 33, a second upper conducting magnet 34, and a lower conducting magnet 35.

[0069] For example, the materials of the first magnet 31 and the second magnet 32 ​​can both be hard magnetic materials, also known as constant magnetic materials (permanent magnets) or permanent magnetic materials (permanent magnets), that is, the first magnet 31 and the second magnet 32 ​​are permanent magnets. It is understood that hard magnetic materials are permanent magnetic materials that can retain magnetism for a long time. For example, magnets. The materials of the first upper magnetic conductor 33, the second upper magnetic conductor 34, and the lower magnetic conductor 35 can all be magnetically conductive materials.

[0070] In some embodiments, the magnetic circuit system 30 may also exclude the lower conductor magnet 35.

[0071] Figure 4 yes Figure 2 The diagram shows an exploded view of the magnetic circuit system 30. Figure 5 yes Figure 4 The diagram shows the assembly structure of the magnetic circuit system 30. Figure 6 yes Figure 2 The diagram shows a partial cross-sectional view of one embodiment of the loudspeaker 100 cut along point AA.

[0072] like Figures 4 to 6 As shown, the magnetic circuit system 30 can be symmetrically arranged about the first axis T1. The second magnet 32 ​​can be arranged around the peripheral side of the first magnet 31. The second magnet 32 ​​can be spaced apart from the peripheral side of the first magnet 31. Both the first magnet 31 and the second magnet 32 ​​can be symmetrically arranged about the first axis T1. The surface of the second magnet 32 ​​facing the peripheral side of the first magnet 31 is the inner peripheral side of the second magnet 32. The gap between the peripheral side of the first magnet 31 and the inner peripheral side of the second magnet 32 ​​is the first gap N1. The first magnet 31 and the second magnet 32 ​​can constitute the magnetic circuit component 30a of the magnetic circuit system 30.

[0073] For example, the first magnet 31 may be generally rectangular in shape. The peripheral surfaces of the first magnet 31 may include a first side surface 311, a second side surface 312, a third side surface 313, and a fourth side surface 314. The first side surface 311 may be positioned opposite to the third side surface 313. The second side surface 312 may be positioned opposite to the fourth side surface 314. The second magnet 32 ​​may include multiple sub-magnets, such as a first sub-magnet 321, a second sub-magnet 322, a third sub-magnet 323, and a fourth sub-magnet 324. The first sub-magnet 321, the second sub-magnet 322, the third sub-magnet 323, and the fourth sub-magnet 324 may all be elongated. The first sub-magnet 321 may face the first side surface 311 and be spaced apart from it. The second sub-magnet 322 may face the second side surface 312 and be spaced apart from it. The third sub-magnet 323 may face the third side surface 313 and be spaced apart from it. The fourth sub-magnet 324 may face the fourth side surface 314 and is spaced apart from the fourth side surface 314. The surfaces of the first sub-magnet 321 facing the first magnet 31, the second sub-magnet 322 facing the first magnet 31, the third sub-magnet 323 facing the first magnet 31, and the fourth sub-magnet 324 facing the first magnet 31 may collectively constitute at least a portion of the inner peripheral side surface of the second magnet 32.

[0074] like Figures 4 to 6 As shown, the first magnet 31 and the second magnet 32 ​​can both be located on the same side of the lower magnetic conductor 35 and are fixedly connected to the lower magnetic conductor 35. The lower magnetic conductor 35 can be symmetrically arranged about the first axis T1. The first upper magnetic conductor 33 can be fixedly connected to the surface of the first magnet 31 facing away from the lower magnetic conductor 35. The second upper magnetic conductor 34 can be fixedly connected to the surface of the second magnet 32 ​​facing away from the lower magnetic conductor 35. At this time, the second upper magnetic conductor 34 can surround the peripheral side surface of the first upper magnetic conductor 33 and is spaced apart from the peripheral side surface of the first upper magnetic conductor 33. Both the first upper magnetic conductor 33 and the second upper magnetic conductor 34 can be symmetrically arranged about the first axis T1. The surface of the second upper magnetic conductor 34 facing the first upper magnetic conductor 33 is the inner peripheral side surface of the second upper magnetic conductor 34. The magnetic gap between the peripheral side surface of the first upper magnetic conductor 33 and the inner peripheral side surface of the second upper magnetic conductor 34 is the second gap N2. The first upper magnetic conductor 33 and the second upper magnetic conductor 34 can constitute the upper magnetic conductor assembly 30b of the magnetic circuit system 30. The second gap N2 can constitute at least a portion of the magnetic gap of the upper magnetic conductor assembly 30b. That is, the first gap N1 and the second gap N2 can together constitute at least a portion of the magnetic gap of the magnetic circuit system 30.

[0075] Exemplarily, the shape of the first upper magnetic conductor 33 may be substantially the same as the shape of the first magnet 31. The second upper magnetic conductor 34 may include a first magnetic conductor 341, a second magnetic conductor 342, a third magnetic conductor 343, and a fourth magnetic conductor 344. The first magnetic conductor 341, the second magnetic conductor 342, the third magnetic conductor 343, and the fourth magnetic conductor 344 may be fixedly connected to the first sub-magnet 321, the second sub-magnet 322, the third sub-magnet 323, and the fourth sub-magnet 324 in a one-to-one correspondence. In this case, the surfaces of the first magnetic conductor 341 facing the first upper magnetic conductor 33, the second magnetic conductor 342 facing the first upper magnetic conductor 33, the third magnetic conductor 343 facing the first upper magnetic conductor 33, and the fourth magnetic conductor 344 facing the first upper magnetic conductor 33 may together constitute at least a portion of the inner peripheral side surface of the second upper magnetic conductor 34. In some embodiments, the second upper magnetic conductor 34 may further include four connecting portions. The four connecting parts can be connected one-to-one between the first magnetic conductive part 341 and the second magnetic conductive part 342, between the second magnetic conductive part 342 and the third magnetic conductive part 343, between the third magnetic conductive part 343 and the fourth magnetic conductive part 344, and between the fourth magnetic conductive part 344 and the first magnetic conductive part 341.

[0076] In other embodiments, the first magnet 31 may also be disk-shaped. The second magnet 32 ​​may also be ring-shaped, that is, the second magnet 32 ​​may be a one-piece molded structure. In this case, the first upper magnetic conductor 33 may also be disk-shaped. The second upper magnetic conductor 34 may also be ring-shaped, and be a one-piece molded structure. It should be understood that the arrangement of the magnetic circuit component 30a and the upper magnetic conductor component 30b of the magnetic circuit system 30 is quite diverse, and this application does not specifically limit the arrangement of the magnetic circuit component 30a and the upper magnetic conductor component 30b.

[0077] Figure 7 yes Figure 3 The diagram shows an exploded view of the support member 50 and the circuit board 40. Figure 8 yes Figure 7 The assembly structure shown is a schematic diagram from another perspective.

[0078] like Figure 7 and Figure 8 As shown, the support member 50 may include a support body 51 and fixing protrusions 52. The number of fixing protrusions 52 can be multiple, for example, four. The four fixing protrusions 52 can be located on the same side of the support body 51 and are fixedly connected to the support body 51. It should be noted that although the support member 50 is described in two parts in this embodiment, it does not affect the fact that the support member 50 is a one-piece molded structure, that is, the support body 51 can be integrally molded with the fixing protrusions 52.

[0079] Exemplarily, the circuit board 40 can be fixed to the surface of the support body 51 facing the fixing protrusion 52. The circuit board 40 can be a rigid circuit board 40, a flexible circuit board 40, or a rigid-flex circuit board 40. Exemplarily, the circuit board 40 may include a first sub-board 40a and a second sub-board 40b spaced apart. The first sub-board 40a may include a first connecting portion 41 and a second connecting portion 42. The second sub-board 40b may include a third connecting portion 43 and a fourth connecting portion 44.

[0080] Figure 9 yes Figure 2 The diagram shows a partial cross-sectional view of one embodiment of the loudspeaker 100 cut along point AA. Figure 10 yes Figure 2 The diagram shows the assembly structure of the vibration system 20 and the adjusting magnet 61 from another perspective.

[0081] like Figure 9 and Figure 10 As shown, the diaphragm 21 can be a planar diaphragm or a diaphragm with a loop structure, etc. Exemplarily, the diaphragm 21 can be a diaphragm with a loop structure. The diaphragm 21 can include a vibrating portion 211 and a first loop portion 212. The first loop portion 212 can be fixedly connected to the outer periphery of the vibrating portion 211. At least a portion of the first loop portion 212 can arch towards one side of the diaphragm 21 to form a loop structure. It should be understood that the outer periphery of the vibrating portion 211 can be the outer peripheral side of the vibrating portion 211, or it can be a portion of the vibrating portion 211 near its outer peripheral side. In this embodiment, the outer periphery of the vibrating portion 211 can be the portion near its outer peripheral side. The vibrating portion 211 and the first loop portion 212 can be a separate structure. In other embodiments, the outer periphery of the vibrating portion 211 can be the outer peripheral side of the vibrating portion 211. That is, the first loop portion 212 can be fixedly connected to the outer peripheral side of the vibrating portion 211. In some embodiments, the vibrating part 211 and the first folded ring part 212 can also be integrally formed. That is, the diaphragm 21 can be an integrally formed structure.

[0082] Exemplarily, the voice coil 22 may be generally ring-shaped. The voice coil 22 may be fixedly connected to the vibrating portion 211 of the diaphragm 21. In this embodiment, the first loop portion 212 may arch along the side facing the voice coil 22. Exemplarily, the voice coil 22 may have a winding shaft. The voice coil 22 may be formed by winding one or more wires multiple times around the winding shaft. In this embodiment, the voice coil 22 may be wound around the winding shaft multiple times in a direction parallel to the winding shaft. In other embodiments, the voice coil 22 may also be wound multiple times in a plane perpendicular to the winding shaft.

[0083] For example, the adjusting magnet 61 can be a permanent magnet. The adjusting magnet 61 can be fixed to the side of the voice coil 22. Here, the side of the voice coil 22 refers to the side of the voice coil 22 facing the voice coil hole (i.e., the inner circumferential side of the voice coil 22) or the side of the voice coil 22 facing away from the voice coil hole (i.e., the outer circumferential side of the voice coil 22). For example, the adjusting magnet 61 can be fixed to the inner circumferential side of the voice coil 22.

[0084] For example, the adjusting magnet 61 can be symmetrically arranged about the central axis of the voice coil 22. In this embodiment, the central axis of the voice coil 22 is also the winding axis of the voice coil 22. The symmetrical arrangement of the adjusting magnet 61 about the central axis of the voice coil 22 can be completely symmetrical or approximately symmetrical, for example, with a distance error within 0.1 mm and / or an angle error within 5°.

[0085] Exemplarily, the adjusting magnet 61 may include a first portion 611 and a second portion 612. The first portion 611 and the second portion 612 may be symmetrically arranged about the central axis of the voice coil 22. The first portion 611 and the second portion 612 may be spaced apart, for example, the first portion 611 and the second portion 612 may be two independent and spaced permanent magnets. Alternatively, the first portion 611 may also be connected to the second portion 612, for example, the first portion 611 may be connected to the second portion 612, and together with the second portion 612, they form a ring-shaped permanent magnet. In this embodiment, the first portion 611 and the second portion 612 may be two independent permanent magnets. The shape and size of the first portion 611 and the second portion 612 may be exactly the same. Both the first portion 611 and the second portion 612 may be generally elongated. The first portion 611 and the second portion 612 may be fixed at intervals to the inner circumferential side of the voice coil 22, and are symmetrically arranged about the central axis of the voice coil 22.

[0086] In other embodiments, the first portion 611 of the adjusting magnet 61 may further include a plurality of spaced permanent magnets. The second portion 612 may also include a plurality of spaced permanent magnets.

[0087] Figure 11 yes Figure 3 A schematic diagram of the assembly structure of the vibration system 20, the adjusting magnet 61, the support 50, and the circuit board 40 shown from another perspective. Figure 12 yes Figure 2 The diagram shows a partial cross-sectional view of one embodiment of the loudspeaker 100 cut along point AA.

[0088] like Figure 11 and Figure 12As shown, the diaphragm 21 can be fixedly connected to the support body 51 of the support member 50. Specifically, the first folded ring portion 212 of the diaphragm 21 can be fixedly connected to the support body 51. The voice coil 22 and the adjustment magnet 61 can both be located on the side of the diaphragm 21 facing the support member 50. At this time, the first connecting portion 41, the second connecting portion 42, the third connecting portion 43, and the fourth connecting portion 44 of the circuit board 40 can all be electrically connected to the voice coil 22. Thus, external devices of the speaker 100 (such as the battery of the electronic device 1000) can transmit current signals to the voice coil 22 through the circuit board 40.

[0089] Figure 13 yes Figure 3 The diagram shows a partial structural assembly of the speaker 100. Figure 14 yes Figure 13 The diagram shown is a structural schematic from another perspective. Figure 15a yes Figure 2 The diagram shows a cross-sectional view of one embodiment of the loudspeaker 100 cut along point AA. For ease of understanding, Figure 14 The diaphragm 21 and the housing 10 are hidden inside.

[0090] like Figures 13 to 15a As shown, the surface of the support body 51 of the support member 50 facing the fixing protrusion 52 can be fixedly connected to the surface of the second upper magnetic conductor 34 facing away from the second magnet 32. The fixing protrusion 52 of the support member 50 can be fixedly connected to the lower magnetic conductor 35. At this time, the diaphragm 21 can be spaced apart from the first upper magnetic conductor 33 of the magnetic circuit system 30. The diaphragm 21 can also be spaced apart from the second upper magnetic conductor 34. The first connecting portion 41 of the circuit board 40 can be located between the first sub-magnet 321 and the second sub-magnet 322. The second connecting portion 42 of the circuit board 40 can be located between the first sub-magnet 321 and the fourth sub-magnet 324. The third connecting portion 43 of the circuit board 40 can be located between the second sub-magnet 322 and the third sub-magnet 323. The fourth connecting portion 44 of the circuit board 40 can be located between the third sub-magnet 323 and the fourth sub-magnet 324. In this way, the multiple connecting parts of the circuit board 40 (i.e., the first connecting part 41, the second connecting part 42, the third connecting part 43 and the fourth connecting part 44 in this embodiment) can utilize the space between the multiple sub-magnets in the second magnet 32 ​​(i.e., the first sub-magnet 321, the second sub-magnet 322, the third sub-magnet 323 and the fourth sub-magnet 324 in this embodiment), and the overall structure of the speaker 100 is more compact.

[0091] For example, a portion of the voice coil 22 may be located between the magnetic gaps in the magnetic circuit system 30, and a portion of the voice coil 22 may be located within the space between the diaphragm 21 and the magnetic circuit system 30. In this case, at least a portion of the adjusting magnet 61 fixed to the inner circumferential side of the voice coil 22 may be located between the voice coil 22 and the first upper magnetic conductor 33. That is, at least a portion of the adjusting magnet 61 may be located within the second gap N2 between the first upper magnetic conductor 33 and the second upper magnetic conductor 34. The central axis of the voice coil 22 may coincide with the first axis T1 of the magnetic circuit system 30. That is, the voice coil 22 may be symmetrically arranged about the first axis T1. The adjusting magnet 61 may also be symmetrically arranged about the first axis T1. In this case, the projection of the adjusting magnet 61 onto the plane where the upper magnetic conductor assembly 30b is located may be symmetrically arranged about the center of the upper magnetic conductor assembly 30b. The center of the upper magnetic conductor assembly 30b may be located on the first axis T1. It should be noted that the plane on which the upper magnetic conductive component 30b is located can be the plane on which the upper magnetic conductive component 30b is parallel to the center plane of the diaphragm 21.

[0092] Exemplarily, the housing 10 may include a top 11 and a frame 12. The frame 12 may be fixedly connected to the periphery of the top 11. The top 11 and the frame 12 may enclose an inner cavity 10a of the housing 10. The top 11 may be provided with a through hole 111. The through hole 111 may communicate with the inner cavity 10a. The vibration system 20 may be fixedly connected to the top 11 of the housing 10.

[0093] Exemplarily, the first folded portion 212 of the diaphragm 21 can be fixedly connected to the wall surface of the through hole 111 of the top 11. At least a portion of the diaphragm 21 can be exposed relative to the through hole 111 of the housing 10. In this case, the diaphragm 21 can close the through hole 111, so that the inner cavity 10a of the housing 10 can be isolated from the outside of the housing 10. In other embodiments, the housing 10 may also be provided with an vent. The inner cavity 10a of the housing 10 can communicate with the outside of the housing 10 through the vent.

[0094] Exemplarily, a portion of the voice coil 22 may be located in the through hole 111, and a portion of the voice coil 22 may be located in the inner cavity 10a. A portion of the support member 50 may be located in the through hole 111, and a portion of the support member 50 may be located in the inner cavity 10a. The adjusting magnet 61 and the magnetic circuit system 30 may both be located in the inner cavity 10a. In some embodiments, the first folded ring portion 212 of the diaphragm 21 may also be fixedly connected to the surface of the top 11 facing the inner cavity 10a. In this case, the voice coil 22, the support member 50, the adjusting magnet 61, and the magnetic circuit system 30 may all be located in the inner cavity 10a.

[0095] Figure 15b yes Figure 15a The structure shown conceals a cross-sectional view of the shell 10.

[0096] like Figure 15bAs shown, the polarity of the portion of the first magnet 31 facing the diaphragm 21 can be opposite to the polarity of the portion of the second magnet 32 ​​facing the diaphragm 21. The polarity of the portion of the first magnet 31 facing away from the diaphragm 21 can also be opposite to the polarity of the portion of the second magnet 32 ​​facing away from the diaphragm 21. That is, the polarization direction of the first magnet 31 is opposite to the polarization direction of the second magnet 32. Here, polarization direction refers to the direction in which the N pole points to the S pole in the magnet. The polarity of the first upper conducting magnet 33 is the same as the polarity of the portion of the first magnet 31 facing the diaphragm 21. The polarity of the second upper conducting magnet 34 is the same as the polarity of the portion of the second magnet 32 ​​facing the diaphragm 21. The polarity of the portion of the adjusting magnet 61 facing the first upper conducting magnet 33 is the same as the polarity of the portion of the first upper conducting magnet 33 facing the adjusting magnet 61, meaning they repel each other. The polarity of the portion of the adjusting magnet 61 facing the second upper conducting magnet 34 is the same as the polarity of the portion of the second upper conducting magnet 34 facing the adjusting magnet 61, meaning they repel each other. The polarization direction of the adjusting magnet 61 can be parallel to the diaphragm 21.

[0097] Exemplarily, the adjusting magnet 61 may have a first end 61a and a second end 61b disposed opposite to each other in its polarization direction. The first end 61a is closer to the upper magnetic conductor assembly 30b than the second end 61b. The repulsive force generated between the first end 61a and the portion of the upper magnetic conductor assembly 30b facing the first end 61a is greater than the repulsive force generated between the second end 61b and the portion of the upper magnetic conductor assembly 30b facing the second end 61b. Taking the first part 611 of the adjusting magnet 61 as an example, the first part 611 is located between the first upper magnetic conductor 33 and the second upper magnetic conductor 34. The distance between the first part 611 and the first upper magnetic conductor 33 may be smaller than the distance between the first part 611 and the second upper magnetic conductor 34. In this case, the end of the first part 611 close to the first upper magnetic conductor 33 may constitute the first end 61a of the first part 611. The end of the first part 611 facing away from the first upper magnetic conductor 33 may constitute the second end 61b of the first part 611. That is, the first part 611 may have a first end 61a and a second end 61b arranged opposite to each other in its polarization direction. Similarly, the second part 612 may also have a first end 61a and a second end 61b arranged opposite to each other in its polarization direction, with the first end 61a being closer to the upper magnetic conductor assembly 30b than the second end 61b. In other words, in this embodiment, the first end 61a of the adjusting magnet 61 is the end of the adjusting magnet 61 that is closer to the first upper magnetic conductor 33, and the second end 61b is the end of the adjusting magnet 61 that is closer to the second upper magnetic conductor 34.

[0098] It should be understood that when the adjusting magnet 61 may include multiple independent and spaced permanent magnets (i.e., the first part 611 and the second part 612 in this embodiment), each permanent magnet has a first end 61a and a second end 61b in its polarization direction. That is, the adjusting magnet 61 may have multiple first ends 61a and multiple second ends 61b. In some embodiments, the adjusting magnet 61 may also be a ring-shaped permanent magnet. In this case, the adjusting magnet 61 may have a ring-shaped first end 61a and a ring-shaped second end 61b. That is, the adjusting magnet 61 may also have only one first end 61a and one first second end 61b. For example, the distance between the inner peripheral side of the adjusting magnet 61 and the first upper conducting magnet 33 is smaller than the distance between the outer peripheral side of the adjusting magnet 61 and the second upper conducting magnet 34. In this case, the inner peripheral side of the adjusting magnet 61 may constitute the first end 61a, and the outer peripheral side of the adjusting magnet 61 may constitute the second end 61b.

[0099] In this embodiment, the polarity of the portion of the first magnet 31 facing the diaphragm 21 can be N (north) and the polarity of the portion facing away from the diaphragm 21 can be S (south). The polarity of the portion of the second magnet 32 ​​facing the diaphragm 21 can be S and the polarity of the portion facing away from the diaphragm 21 can be N. At this time, the polarity of the first upper magnetic conductor 33 can be N. The polarity of the second upper magnetic conductor 34 can be S. The first end 61a of the adjusting magnet 61 can be N. The second end 61b of the adjusting magnet 61 can be S. It should be understood that... Figure 15a The accompanying drawings only illustrate one embodiment of the magnetization method for the first magnet 31 and the second magnet 32. Other magnetization methods, such as Hellbeck arrays, can also be used for the first magnet 31 and the second magnet 32; this application does not specifically limit this method.

[0100] For example, when current is input to the voice coil 22, the voice coil 22 can be subjected to a magnetic field force, generating an Ampere force parallel to the thickness direction of the diaphragm 21, and moving along this direction to cut magnetic field lines. At this time, the voice coil 22 can drive the diaphragm 21 to reciprocate along this direction. The voice coil 22 can also drive the adjusting magnet 61 to reciprocate along this direction. In other words, when current is input to the voice coil 22, the voice coil 22, the diaphragm 21, and the adjusting magnet 61 can move together in the same direction as a whole.

[0101] In some embodiments, the outer peripheral side of the first upper magnet 33 may be partially recessed inward to form a first clearance groove 33a. The outer peripheral side of the first magnet 31 may be partially recessed inward to form a second clearance groove 31a. The first clearance groove 33a may communicate with the second clearance groove 31a and be stacked with the second clearance groove 31a in the thickness direction of the diaphragm 21. At least a portion of the adjusting magnet 61 may be located within the first clearance groove 33a. When the voice coil 22 is energized, and the adjusting magnet 61 moves along with the voice coil 22, the adjusting magnet 61 may move within the first clearance groove 33a and the second clearance groove 31a. In this way, by providing the first clearance groove 33a and the second clearance groove 31a to avoid the adjusting magnet 61, the adjusting magnet 61 can also utilize the space of the first upper magnet 33 and the first magnet 31, making the overall structure of the speaker 100 more compact and facilitating the miniaturization of the speaker 100.

[0102] In other embodiments, the adjusting magnet 61 may also be fixed to the outer peripheral side of the voice coil 22. In this case, the adjusting magnet 61 may be located between the outer peripheral side of the voice coil 22 and the inner peripheral side of the second magnetic conductor. The first clearance groove 33a may be formed on the inner peripheral side of the second magnetic conductor. The second clearance groove 31a may be formed on the inner peripheral side of the second magnet 32. The first end 61a of the adjusting magnet 61 may be the end of the adjusting magnet 61 near the second upper magnetic conductor 34, and the second end 61b may be the end of the adjusting magnet 61 near the first upper magnetic conductor 33.

[0103] Figure 16 yes Figure 14 The diagram shows a cross-sectional view of the loudspeaker 100 when the voice coil 22 is in the equilibrium position. Figure 17 yes Figure 14 The diagram shows a cross-sectional view of the voice coil 22 of the loudspeaker 100 at one of the moments when a first current is input. Figure 18 yes Figure 14 The diagram shows a cross-sectional view of the voice coil 22 of the loudspeaker 100 at one of the moments when a second current is input.

[0104] like Figures 16 to 18As shown, the first part 611 of the adjusting magnet 61 can be subjected to a repulsive force from the first upper magnetic conductor 33 and a repulsive force from the second upper magnetic conductor 34. The second part 612 of the adjusting magnet 61 can be subjected to a repulsive force from the first upper magnetic conductor 33 and a repulsive force from the second upper magnetic conductor 34. These repulsive forces can be decomposed into a vertical component along the thickness direction of the speaker 100 and a horizontal component along the direction perpendicular to the thickness of the speaker 100. It is understood that the projection of the adjusting magnet 61 onto the plane containing the upper magnetic conductor assembly 30b can be symmetrically arranged about the center of the upper magnetic conductor assembly 30b, such that the sum of the horizontal components of the repulsive forces from the first and second upper magnetic conductors 33 on the adjusting magnet 61 is 0. For simplicity, unless otherwise specified, the repulsive force, repulsive force, etc., referred to below all refer to the vertical component of the force, ignoring its horizontal component.

[0105] For example, the second gap N2 between the first upper magnet 33 and the second upper magnet 34 may include a connected first space N21 and a second space N22. The first space N21 and the second space N22 may be stacked along the thickness direction of the speaker 100. The first space N21 and the second space N22 may have the same shape and size. Figures 17 to 19 The first space N21 and the second space N22 are schematically outlined with dashed lines. The interface between the first space N21 and the second space N22 is the first interface M1. At this time, the portion of the first part 611 of the adjusting magnet 61 located above the first interface M1 (i.e., in the first space N21) is the first upper magnet 6111. The portion of the first part 611 of the adjusting magnet 61 located below the first interface M1 (i.e., in the second space N22) is the first lower magnet 6112. That is, the first upper magnet 6111 and the first lower magnet 6112 can be stacked along the thickness direction of the speaker 100. The portion of the second part 612 of the adjusting magnet 61 located above the first interface M1 is the second upper magnet 6121. The portion of the second part 612 of the adjusting magnet 61 located below the first interface M1 is the second lower magnet 6122. That is, the second upper magnet 6121 and the second lower magnet 6122 can be stacked along the thickness direction of the diaphragm 21.

[0106] When no current is input to the voice coil 22 and the voice coil 22 is in the equilibrium position, the diaphragm 21 does not deform. At this time, the elastic restoring force of the vibration system 20 itself is 0. The first upper magnetic part 6111 and the first lower magnetic part 6112 of the first part 611 of the adjusting magnet 61 can be arranged symmetrically about the first interface M1. The volume of the first upper magnetic part 6111 and the volume of the first lower magnetic part 6112 can be equal. The first upper magnetic part 6111 can be subjected to a first repulsive force f1 along a first direction from the first upper magnetic conductor 33 and the second upper magnetic conductor 34. The first lower magnetic part 6112 can be subjected to a second repulsive force f2 along a second direction from the first upper magnetic conductor 33 and the second upper magnetic conductor 34. The first direction can be the direction in which the voice coil 22 points to the diaphragm 21. The first direction can be parallel to the thickness direction of the diaphragm 21. The second direction is opposite to the first direction. The first repulsive force f1 and the second repulsive force f2 are equal in magnitude and opposite in direction. That is, the first repulsive force f1 and the second repulsive force f2 can cancel each other out.

[0107] At this time, the second upper magnetic part 6121 and the second lower magnetic part 6122 of the second part 612 can be arranged symmetrically about the first interface M1. The volume of the second upper magnetic part 6121 and the volume of the second lower magnetic part 6122 can be equal. The second upper magnetic part 6121 can be subjected to a third repulsive force f3 along the first direction from the first upper magnetic conductor 33 and the second upper magnetic conductor 34. The second lower magnetic part 6122 can be subjected to a fourth repulsive force f4 along the second direction from the first upper magnetic conductor 33 and the second upper magnetic conductor 34. The third repulsive force f3 and the fourth repulsive force f4 are equal in magnitude and opposite in direction. That is, the third repulsive force f3 and the fourth repulsive force f4 can cancel each other out. At this time, the total repulsive force on the adjusting magnet 61 from the first upper magnetic conductor 33 and the second upper magnetic conductor 34 is 0. That is, the repulsive force of the upper magnetic conductor assembly 30b on the adjusting magnet 61 is 0. At this time, the force exerted by the adjusting magnet 61 on the vibration system 20 can be 0.

[0108] When a first current is input to the voice coil 22, the voice coil 22 can move along a first direction, driving the diaphragm 21 to move along the first direction as well. At this time, the adjusting magnet 61 can move along the first direction together with the voice coil 22. As the distance the adjusting magnet 61 moves along the first direction gradually increases, the volume of the first upper magnetic part 6111 located above the first interface M1 in the first part 611 gradually increases, while the volume of the first lower magnetic part 6112 located below the first interface M1 gradually decreases. Simultaneously, the first repulsive force f1 experienced by the first upper magnetic part 6111 gradually increases, while the second repulsive force f2 experienced by the first lower magnetic part 6112 gradually decreases.

[0109] When the adjusting magnet 61 moves along the voice coil 22 in the first direction until the volume of the first upper magnet 6111 is greater than the volume of the first lower magnet 6112, the diaphragm 21 can bulge along the first direction and deform. At this time, the vibration system 20 itself has an elastic restoring force to resist the vibration of the vibration system 20. The direction of this elastic restoring force is opposite to the direction of the diaphragm 21 bulging (in this embodiment, the direction of the elastic restoring force of the vibration system 20 at this time is the second direction). The first repulsive force f1 received by the first upper magnet 6111 can be greater than the second repulsive force f2 received by the first lower magnet 6112. At the same time, the volume of the second upper magnet 6121 can be greater than the volume of the second lower magnet 6122. The third repulsive force f3 received by the second upper magnet 6121 can be greater than the fourth repulsive force f4 received by the second lower magnet 6122. At this time, the total repulsive force (i.e., the repulsive force of the upper magnetic component 30b on the adjusting magnet 61) from the first upper magnetic conductor 33 and the second upper magnetic conductor 34 is the first magnetic repulsive force F1, and satisfies:

[0110] F1 = f1 - f2 + f3 - f4

[0111] The direction of the first magnetic repulsion force F1 is the first direction. The direction of the first magnetic repulsion force F1 is the same as the direction of the movement of the voice coil 22, and opposite to the direction of the elastic restoring force of the vibration system 20 itself.

[0112] When a second current is input to the voice coil 22, the voice coil 22 can move along a second direction, pushing the diaphragm 21 to move along the same direction. This second direction can be opposite to the first direction. The second direction can be parallel to the thickness direction of the diaphragm 21. At this time, the adjusting magnet 61 can move along the second direction with the voice coil 22. As the distance the adjusting magnet 61 moves along the second direction increases, the volume of the first upper magnetic part 6111 located above the first interface M1 in the first part 611 decreases, while the volume of the first lower magnetic part 6112 located below the first interface M1 increases. Simultaneously, the first repulsive force f1 experienced by the first upper magnetic part 6111 decreases, while the second repulsive force f2 experienced by the first lower magnetic part 6112 increases.

[0113] When the adjusting magnet 61 moves along the second direction with the voice coil 22 until the volume of the first upper magnet 6111 is smaller than the volume of the first lower magnet 6112, the diaphragm 21 can bulge along the second direction and deform. At this time, the vibration system 20 itself has an elastic restoring force, and the direction of the elastic restoring force is opposite to the direction of the diaphragm 21 bulging (in this embodiment, the direction of the elastic restoring force of the vibration system 20 at this time is the first direction). The first repulsive force f1 received by the first upper magnet 6111 can be less than the second repulsive force f2 received by the first lower magnet 6112. At the same time, the volume of the second upper magnet 6121 can be less than the volume of the second lower magnet 6122. The third repulsive force f3 received by the second upper magnet 6121 can be less than the fourth repulsive force f4 received by the second lower magnet 6122. At this time, the sum of the total repulsive forces from the first upper magnetic conductor 33 and the second upper magnetic conductor 34 on the adjusting magnet 61 (that is, the repulsive force of the upper magnetic conductor assembly 30b on the adjusting magnet 61) is the second magnetic repulsive force F2, and satisfies:

[0114] F2 = f2 - f1 + f4 - f3

[0115] The direction of the second magnetic repulsion force F2 is the second direction. The direction of the second magnetic repulsion force F2 is the same as the direction of the movement of the voice coil 22, and opposite to the direction of the elastic restoring force of the vibration system 20 itself.

[0116] Figure 19 yes Figure 14 The diagram shows a simulation curve of the displacement of the voice coil 22 of the loudspeaker 100 and the repulsive force of the upper magnetic guide assembly 30b on the adjustment magnet 61. Figure 20 yes Figure 14 The diagram shows a simulation of the frequency response curve of the loudspeaker 100 compared to a typical loudspeaker unit. When the voice coil 22 has no input current, meaning it is stationary, its displacement is zero. A positive displacement of the voice coil 22 indicates movement in a first direction relative to its stationary state; conversely, a negative displacement indicates movement in a second direction relative to its stationary state. A positive force exerted by the adjusting magnet 61 on the vibration system 20 indicates the force is directed in the first direction; conversely, a negative force indicates the force is directed in the second direction. Figure 19 Curve 1 in the diagram represents a typical loudspeaker, and curve 2 represents... Figure 15a The speaker 100 shown.

[0117] like Figure 19 and Figure 20As shown, as the absolute value of the displacement of the voice coil 22 after the input current increases, the absolute value of the total repulsive force on the adjusting magnet 61 also increases, and the absolute value of the force exerted by the adjusting magnet 61 on the vibration system 20 increases accordingly. The displacement of the voice coil 22 and the total repulsive force on the adjusting magnet 61 can be approximately linearly related, that is, the displacement of the voice coil 22 and the force exerted by the adjusting magnet 61 on the vibration system 20 can be approximately linearly related. The force exerted by the adjusting magnet 61 on the vibration system 20 can be considered as the total repulsive force on the adjusting magnet 61. The force exerted by the adjusting magnet 61 on the vibration system 20 can be equivalent to an elastic component, and the elastic coefficient of this elastic component can be Km. The direction of the elastic force of this elastic component (in this embodiment, that is, the repulsive force of the upper magnetic guide assembly 30b on the adjusting magnet 61) is opposite to the direction of the elastic restoring force of the vibration system 20.

[0118] It is understandable that the resonant frequency F0 of a typical loudspeaker unit can be:

[0119]

[0120] Where Ks is the equivalent elastic restoring force of the vibrating system in the speaker unit. As can be seen from the above expression, the elastic restoring force of the vibrating system inhibits the vibration of the diaphragm, resulting in a higher resonant frequency and poorer low-frequency performance of the speaker unit. The equivalent elastic restoring force can be reduced by thinning the diaphragm's surround structure or by using a material with a lower Young's modulus to fabricate the diaphragm's surround structure. However, a lower equivalent elastic restoring force can cause the voice coil to deflect or tilt during operation, i.e., polarization occurs. This makes the voice coil prone to rubbing against the magnetic circuit system during movement, affecting the normal operation of the speaker unit.

[0121] In this embodiment, the loudspeaker 100 has an adjusting magnet 61 disposed on the side of the voice coil 22. When the voice coil 22 is in the balanced position, at least a portion of the adjusting magnet 61 can be located within the magnetic gap of the upper magnetic guide assembly 30b (in this embodiment, the adjusting magnet 61 can be located within the second gap N2 between the first upper magnetic guide assembly 33 and the second upper magnetic guide assembly 34). Simultaneously, the polarization direction of the adjusting magnet 61 is parallel to the diaphragm 21. The adjusting magnet 61 has a first end 61a and a second end 61b disposed opposite to each other in its polarization direction. The first end 61a is closer to the upper magnetic guide assembly 30b than the second end 61b. A repulsive force is generated between the first end 61a and the upper magnetic guide assembly 30b. In other words, the polarity of the first end 61a of the adjusting magnet 61 is the same as the polarity of the portion of the upper magnetic guide assembly 30b facing the first end 61a. The polarity of the second end 61b of the adjusting magnet 61 is the same as the polarity of the portion of the upper magnetic guide assembly 30b facing the second end 61b. (In this embodiment, the polarity of the portion of the adjusting magnet 61 facing the first upper guiding magnet 33 is the same as the polarity of the portion of the first upper guiding magnet 33 facing the adjusting magnet 61. The polarity of the portion of the adjusting magnet 61 facing the second upper guiding magnet 34 is the same as the polarity of the portion of the second upper guiding magnet 34 facing the adjusting magnet 61.) At this time, the adjusting magnet 61 can be subjected to a repulsive force from the upper guiding magnet assembly 30b. As the absolute value of the displacement of the voice coil 22 relative to its equilibrium position increases, the absolute value of the total repulsive force on the adjusting magnet 61 also increases, and the two approximately satisfy a linear relationship with high linearity. The direction of the total repulsive force on the adjusting magnet 61 is opposite to the direction of the elastic restoring force of the vibration system 20 itself. The total repulsive force on the adjusting magnet 61 can act on the vibration system 20. Thus, the force exerted by the adjusting magnet 61 on the vibration system 20 (in this embodiment, the total repulsive force on the adjusting magnet 61) can be equivalent to an elastic component, and the elastic coefficient of this elastic component can be Km. At this time, the resonant frequency F0 of the speaker 100 can be:

[0122]

[0123] As can be seen from the above expression, when the total repulsive force acting on the adjusting magnet 61 in this embodiment acts on the vibration system 20, it can offset at least a portion of the elastic restoring force of the vibration system 20 itself in the speaker 100, thereby reducing the influence of the elastic restoring force of the vibration system 20 itself on the vibration of the diaphragm 21. Thus, under the condition that the thickness and material of the diaphragm 21 are exactly the same, the resonant frequency F0 of the speaker 100 in this embodiment is smaller, and the low-frequency performance of the speaker 100 is better. In other words, the speaker 100 in this embodiment can have good low-frequency performance while meeting the stiffness requirements of the vibration system 20 itself, and the oscillation of the voice coil 22 during movement is smaller.

[0124] Secondly, compared to a loudspeaker where the force exerted on the adjusting magnet by the upper magnetic guide assembly is attractive, in this embodiment, the force exerted on the adjusting magnet 61 by the first upper magnetic guide 33 and the second upper magnetic guide 34 is repulsive. This effectively avoids the problem of the adjusting magnet 61 being too close to the first upper magnetic guide 33 or the second upper magnetic guide 34, causing the adjusting magnet 61 to adhere to the first upper magnetic guide 33 or the second upper magnetic guide 34 and preventing the voice coil 22 from moving normally. This helps ensure the normal operation of the loudspeaker 100. In other words, the distance between the adjusting magnet 61 and the first upper magnetic guide 33 and the second upper magnetic guide 34 in this embodiment can be smaller, which is beneficial for achieving a miniaturized design of the loudspeaker 100.

[0125] Furthermore, when the voice coil 22 is stationary, relative to the first direction, the adjusting magnet 61, the first upper conducting magnet 33, and the second upper conducting magnet 34, which provide repulsive force to the adjusting magnet 61, are arranged to the left, center, and right. The arrangement of these three is perpendicular to the direction of movement of the voice coil 22 (i.e., perpendicular to the first / second direction). Thus, when the voice coil 22 is energized and moves along the first or second direction, the adjusting magnet 61 will not affect the amplitude of the voice coil 22; the amplitude of the voice coil 22 is only limited by the distance between the voice coil 22 and other components of the speaker 100 in its direction of movement. In other words, the speaker 100 in this embodiment can achieve high amplitude and high power operation, which is beneficial for improving the acoustic performance of the speaker 100.

[0126] Furthermore, in this embodiment, the polarization direction of the adjusting magnet 61 is perpendicular to the first direction. Even if the adjusting magnet 61 moves along the second direction with the voice coil 22 and approaches the lower conductor magnet 35, the forces exerted by the lower conductor magnet 35 on the S pole and N pole of the adjusting magnet 61 are equal in magnitude and opposite in direction. This can effectively prevent the lower conductor magnet 35 from generating additional repulsive or attractive forces on the adjusting magnet 61, thus affecting the normal operation of the speaker 100.

[0127] In some embodiments, the inner cavity 10a of the loudspeaker 100 can also be a closed space. In this case, the resonant frequency F0 of the loudspeaker 100 can be:

[0128]

[0129] Where Kb is the equivalent elastic modulus of the air in the cavity 10a of the loudspeaker 100, and satisfies:

[0130]

[0131] Where ρ is the air density, C is the air velocity, Sd is the vibrating area of ​​the loudspeaker 100, and V is the volume of the inner cavity 10a. From the above expression, it can be seen that the air in the inner cavity 10a can be considered an equivalent elastic component. The air in the inner cavity 10a can generate an equivalent elastic force, and the direction of this elastic force is the same as the direction of the elastic restoring force of the vibration system 20. In this embodiment, the loudspeaker 100 is provided with an adjusting magnet 61, which can be subjected to a repulsive force from the upper magnetic guide assembly 30b, and the direction of this repulsive force is opposite to the direction of the elastic restoring force of the vibration system 20. The adjusting magnet 61 applies this repulsive force to the vibration system 20, thereby canceling at least a portion of the equivalent elastic force of the air in the inner cavity 10a of the loudspeaker 100, thus reducing the influence of the equivalent elastic force of the air in the inner cavity 10a of the loudspeaker 100 on the movement of the diaphragm 21. Thus, under the condition that the size of the speaker 100 is the same and the volume of the inner cavity 10a of the speaker 100 is the same, the resonant frequency F0 of the speaker 100 in this embodiment is smaller, and the low-frequency performance of the speaker 100 is better. Under the condition that the resonant frequency F0 is the same, the volume of the inner cavity 10a of the speaker 100 in this embodiment can be smaller, which is beneficial to achieving a miniaturized design of the speaker 100. In other words, the speaker 100 in this embodiment can meet the requirements of miniaturization while having good low-frequency performance.

[0132] In some embodiments, the size of the adjusting magnet 61 in the first direction can be larger than the size of the second gap N2 in the first direction. This larger size of the adjusting magnet 61 results in a greater repulsive force from the first upper conductor magnet 33 and the second upper conductor magnet 34, increasing the force exerted by the adjusting magnet 61 on the vibration system 20. This, in turn, can more effectively counteract the elastic restoring force of the speaker 100's vibration system 20, thereby enabling the speaker 100 to have better low-frequency performance.

[0133] Secondly, compared to the smaller size of the adjusting magnet 61, the repulsive force it experiences from the first upper guiding magnet 33 and the second upper guiding magnet 34 is smaller. When the displacement of the voice coil 22 along the first or second direction is large, the adjusting magnet 61 is farther away from the first upper guiding magnet 33 and the second upper guiding magnet 34, causing the total repulsive force on the adjusting magnet 61 from the first upper guiding magnet 33 and the second upper guiding magnet 34 to decrease sharply. This results in the total repulsive force on the adjusting magnet 61 not satisfying a linear relationship with the displacement of the voice coil 22, indicating low linearity. However, in this embodiment, the adjusting magnet 61 is larger in the first direction. Even if the displacement of the voice coil 22 along the first or second direction is large, the distance between the adjusting magnet 61 and the first upper guiding magnet 33 and the second upper guiding magnet 34 remains relatively close. This allows the relationship between the total repulsive force on the adjusting magnet 61 from the first upper guiding magnet 33 and the second upper guiding magnet 34 and the displacement of the voice coil 22 to be closer to a linear relationship, indicating higher linearity. In other words, by increasing the size of the adjusting magnet 61 in the first direction, the total repulsive force on the adjusting magnet 61 can still maintain a linear relationship with the displacement of the voice coil 22 even when the speaker 100 is operating at high power and large amplitude, and the linearity between the two is high. That is, the speaker 100 in this embodiment can meet the high power requirements while improving low-frequency performance.

[0134] In some other embodiments, in the first direction, the distance between the surface of the adjusting magnet 61 facing away from the diaphragm 21 and the diaphragm 21 is a first distance. The distance between the surface of the voice coil 22 facing away from the diaphragm 21 and the diaphragm 21 is a second distance. The first distance can be less than or equal to the second distance. In this way, in the first direction, the lower surface of the adjusting magnet 61 (i.e., the surface of the adjusting magnet 61 facing away from the diaphragm 21) will not extend beyond the lower surface of the voice coil 22 (i.e., the surface of the voice coil 22 facing away from the diaphragm 21), thereby preventing the adjusting magnet 61 from colliding with the lower conductor magnet 35 when the voice coil 22 moves in the second direction, which would affect the normal operation of the speaker 100.

[0135] Figure 21 yes Figure 14 The speaker 100 shown is a partial cross-sectional structural diagram from another perspective in another embodiment.

[0136] like Figure 21 As shown, the structure of the speaker 100 in this embodiment is similar to... Figure 14The structures of the speaker 100 shown are largely the same, and the similarities will not be described again. The differences between the two will be introduced below. In this embodiment, the first upper magnet 33 may be provided with a first clearance hole 33b. The first clearance hole 33b may be symmetrically arranged about the first axis T1. The first clearance hole 33b may penetrate the surface of the first upper magnet 33 facing the diaphragm 21 and the surface of the first upper magnet 33 facing away from the diaphragm 21. The first magnet 31 may be provided with a second clearance hole 31b. The second clearance hole 31b may be symmetrically arranged about the first axis T1. In this case, both the first magnet 31 and the first upper magnet 33 may be approximately annular. The second clearance hole 31b may connect to the first clearance hole 33b. The first clearance hole 33b and the second clearance hole 31b may be stacked along the first direction. The first clearance hole 33b may form part of the magnetic gap of the upper magnet assembly 30b. The speaker 100 may also include a connecting bracket 62. The material of the connecting bracket 62 may be a non-magnetic material, such as plastic. The connecting bracket 62 can be symmetrically arranged about the first axis T1. The connecting bracket 62 can be fixed to the surface of the diaphragm 21 facing the first clearance hole 33b. The end of the connecting bracket 62 facing away from the diaphragm 21 can be spaced apart from the lower magnet 35.

[0137] Exemplarily, at least a portion of the connecting bracket 62 may be located within the first clearance hole 33b. The connecting bracket 62 may be spaced apart from the inner peripheral side of the first upper magnetic conductor 33. The adjusting magnet 61 may be fixed to the outer peripheral side of the connecting bracket 62. The adjusting magnet 61 may be symmetrically arranged about the first axis T1. The polarity of the portion of the adjusting magnet 61 facing the first upper magnetic conductor 33 may be the same as the polarity of the portion of the first upper magnetic conductor 33 facing the adjusting magnet 61. The polarity of the portion of the adjusting magnet 61 facing the connecting bracket 62 may be opposite to the polarity of the portion of the adjusting magnet 61 facing the first upper magnetic conductor 33.

[0138] Understandably, compared to fixing the adjusting magnet to the side of the voice coil, when the speaker's operating power is high, the current on the voice coil increases, causing the voice coil to heat up and its temperature to rise. As the voice coil temperature rises, the high temperature can cause the adjusting magnet in contact with the voice coil to demagnetize, reducing the linearity between the total repulsive force on the adjusting magnet and the displacement of the voice coil, thus affecting the speaker's low-frequency performance. In this embodiment, by fixing the adjusting magnet 61 to the connecting bracket 62 that connects to the diaphragm 21, and providing clearance holes in the first upper magnet 33 and the first magnet 31 to avoid the connecting bracket 62 and the adjusting magnet 61 fixed to the connecting bracket 62, the temperature of the adjusting magnet 61 caused by the heating of the voice coil 22 can be effectively avoided, thus preventing demagnetization. This allows the speaker 100 to meet high power requirements while still maintaining good low-frequency performance.

[0139] In some embodiments, the end of the connecting bracket 62 facing away from the diaphragm 21 may also be spaced apart from the first clearance hole 33b. In this case, the adjusting magnet 61 may also be fixed to the surface of the connecting bracket 62 facing away from the diaphragm 21. At least a portion of the adjusting magnet 61 may be located within the first clearance hole 33b.

[0140] In some embodiments, the loudspeaker 100 may not include the lower magnet 35. The surface of the first magnet 31 facing away from the diaphragm 21 and the surface of the second magnet 32 ​​facing away from the diaphragm 21 may also be fixedly connected to the housing 10 (see reference). Figure 15a (As shown). At this time, the housing 10 may also be provided with a third clearance hole (not shown). The third clearance hole can be connected to the second clearance hole 31b. In this way, when the size of the adjusting magnet 61 in the first direction is large, the distance from the surface of the adjusting magnet 61 facing away from the diaphragm 21 to the diaphragm 21 is greater than the distance from the surface of the voice coil 22 facing away from the diaphragm 21 to the diaphragm 21, and the amplitude of the voice coil 22 is large, the third clearance hole can avoid the adjusting magnet 61, thereby improving the low-frequency performance of the loudspeaker 100 while meeting the high-power operation requirements.

[0141] Figure 22 yes Figure 21 The speaker 100 shown is a cross-sectional structural schematic diagram in another embodiment.

[0142] like Figure 22 As shown, the structure of the speaker 100 in this embodiment is similar to... Figure 21The speaker 100 shown has a largely similar structure, and the identical parts will not be described again. The difference lies in that the speaker 100 in this embodiment may further include a first magnetic element 63, a second magnetic element 64, and a central support 65. The first magnetic element 63 and the second magnetic element 64 can constitute a magnetic assembly. The first magnetic element 63 can be fixedly connected to the surface of the diaphragm 21 facing the first clearance hole 33b. The second magnetic element 64 can be fixedly connected to the surface of the lower magnetic conductor 35 facing the second clearance hole 31b. The central support 65 can be connected between the first magnetic element 63 and the second magnetic element 64. Both the first magnetic element 63 and the second magnetic element 64 can be soft magnets. Both the first magnetic element 63 and the second magnetic element 64 can be symmetrically arranged about the first axis T1. The adjusting magnet 61 can be fixedly connected to the surface of the diaphragm 21 facing the first clearance hole 33b via a connecting bracket 62. The material of the central support 65 can be a non-magnetic material, such as plastic. In this case, the portion of the adjusting magnet 61 facing the first upper magnetic conductor 33 can constitute the first end 61a of the adjusting magnet 61. The portion of the adjusting magnet 61 facing the central support 65 can constitute the second end 61b of the adjusting magnet 61. Exemplarily, the distance from the first magnetic element 63 to the second end 61b can be equal to the distance from the second magnetic element 64 to the second end 61b. It should be noted that the distances from the first magnetic element 63 to the second end 61b and the distances from the second magnetic element 64 to the second end 61b can be completely equal or approximately equal; for example, the error range between the two can be within 0.1 mm.

[0143] For example, the adjusting magnet 61 can be subjected to a first attractive force from the first magnetic element 63 and a second attractive force from the second magnetic element 64. That is, the magnetic components can exert an attractive force on the adjusting magnet 61. The aforementioned attractive forces can be decomposed into a vertical component along the thickness direction of the speaker 100 and a horizontal component along the direction perpendicular to the thickness of the speaker 100. It is understood that the projection of the adjusting magnet 61 onto the plane of the upper magnetic guide assembly 30b can be symmetrically arranged about the center of the upper magnetic guide assembly 30b, and the distance from the first magnetic element 63 to the second end 61b can be equal to the distance from the second magnetic element 64 to the second end 61b, such that the sum of the horizontal components of the attractive forces exerted on the adjusting magnet 61 by the first magnetic element 63 and the second magnetic element 64 is 0. For the sake of simplicity, unless otherwise specified, the terms attractive force, attraction force, etc., refer to the vertical component of the force, ignoring its horizontal component.

[0144] For example, when the voice coil 22 is not energized and is in its equilibrium position, the diaphragm 21 does not deform. The elastic restoring force of the vibration system 20 is 0. In the first direction, the distance from the adjusting magnet 61 to the first magnetic element 63 is equal to the distance from the adjusting magnet 61 to the second magnetic element 64. The attractive forces from the first magnetic element 63 and the second magnetic element 64 acting on the adjusting magnet 61 can cancel each other out. At this time, the attractive force from the magnetic components acting on the adjusting magnet 61 is 0.

[0145] When the voice coil 22 receives a first current, it can move along a first direction, pushing the diaphragm 21 to move along the same direction. At this time, the adjusting magnet 61 can move along the first direction with the voice coil 22. When the adjusting magnet 61 moves along the first direction with the voice coil 22 until the volume of the first upper magnetic part 6111 is greater than the volume of the first lower magnetic part 6112, the diaphragm 21 can deform along the first protrusion. At this time, the adjusting magnet 61 is closer to the first magnetic element 63 and farther from the second magnetic element 64. The first attractive force on the adjusting magnet 61 can be greater than the second attractive force. At this time, the attractive force from the magnetic components on the adjusting magnet 61 is the first magnetic attraction force F3, which is the difference between the first attraction force and the second attraction force. The direction of the first magnetic attraction force F3 is the first direction. The direction of the first magnetic attraction force F3 is the same as the direction of the first magnetic repulsion force F1, and opposite to the direction of the elastic restoring force of the vibration system 20 itself.

[0146] When a second current is input to the voice coil 22, the voice coil 22 can move along the second direction, pushing the diaphragm 21 to move along the second direction as well. At this time, the adjusting magnet 61 can move along the second direction with the voice coil 22. When the adjusting magnet 61 moves along the second direction with the voice coil 22 until the volume of the first upper magnetic part 6111 is smaller than the volume of the first lower magnetic part 6112, the diaphragm 21 can bulge along the second direction and deform. At this time, the adjusting magnet 61 is farther away from the first magnetic element 63 and closer to the second magnetic element 64. The first attractive force on the adjusting magnet 61 can be less than the second attractive force on the adjusting magnet 61. At this time, the attractive force from the magnetic components on the adjusting magnet 61 is the second magnetic attraction force F4, and the second magnetic attraction force F4 can be the difference between the second attraction force and the first attraction force. The direction of the second magnetic attraction force F4 is the second direction. The direction of the second magnetic attraction force F4 is the same as the direction of the second magnetic repulsion force F2, and opposite to the direction of the elastic restoring force of the vibration system 20 itself.

[0147] Understandably, when the voice coil amplitude is large, the displacement of the voice coil along the first or second direction is large, and the distance between the adjusting magnet and the first upper guiding magnet is large, the total repulsive force on the adjusting magnet will decrease sharply. This results in the force exerted by the adjusting magnet on the vibration system not satisfying a linear relationship with the displacement of the voice coil, and the linearity between the two is low. In this embodiment, a first magnetic element 63 and a second magnetic element 64 are respectively provided at both ends of the central support 65. Both the first magnetic element 63 and the second magnetic element 64 can generate an attractive force with the adjusting magnet 61. At this time, the force exerted by the adjusting magnet 61 on the vibration system 20 can be the sum of the total repulsive force (i.e., the repulsive force of the upper guiding magnet assembly 30b) received by the adjusting magnet 61 from the first upper guiding magnet 33 and the attractive force received by the adjusting magnet 61 from the magnetic assembly. In this way, even if the displacement of the voice coil 22 along the first or second direction is large, and the distance between the adjusting magnet 61 and the first upper conductor magnet 33 is large, resulting in a sharp decrease in the total repulsive force on the adjusting magnet 61, the total attractive force on the adjusting magnet 61 can compensate for the sharp decrease in the total repulsive force, so that the force exerted by the adjusting magnet 61 on the vibration system 20 can still maintain a linear relationship with the displacement of the voice coil 22. That is, the loudspeaker 100 in this embodiment can meet the high power requirements while improving low-frequency performance.

[0148] In some embodiments, the diaphragm 21 may further include a second folded ring portion 213. The vibrating portion 211 of the diaphragm 21 may be generally annular. The second folded ring portion 213 may connect the inner periphery of the vibrating portion 211 and the first magnetic element 63. The second folded ring portion 213 may protrude relative to the vibrating portion 211 in a direction away from the voice coil 22 to form a folded ring structure. In this way, compared to the diaphragm 21 without the second folded ring portion 213, where the first magnetic element 63 is directly fixedly connected to the vibrating portion 211, in this embodiment, the vibrating portion 211 of the diaphragm 21 can be indirectly connected to the first magnetic element 63 through the second folded ring portion 213, making the vibrating portion 211 easier to vibrate and improving the acoustic performance of the loudspeaker 100.

[0149] In some implementations, such as Figure 23 As shown, both the first magnetic element 63 and the second magnetic element 64 can be permanent magnets. The polarization direction of the first magnetic element 63 is opposite to that of the second magnetic element 64, and both are parallel to the first direction. The polarity of the portion of the first magnetic element 63 facing the second magnetic element 64 is the same as the polarity of the portion of the adjusting magnet 61 facing the connecting bracket 62.

[0150] It should be noted that, in the absence of conflict, the features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0151] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0152] The above are merely some embodiments of this application, and the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A loudspeaker (100), characterized in that, include: The vibration system (20) includes a diaphragm (21) and a voice coil (22), wherein the voice coil (22) is fixed to the diaphragm (21). A magnetic circuit system (30) is provided at an interval from the vibration system (20). The magnetic circuit system (30) includes a magnetic circuit assembly (30a) and an upper magnetic guide assembly (30b). The upper magnetic guide assembly (30b) is located on the side of the magnetic circuit assembly (30a) close to the diaphragm (21) and is fixedly connected to the magnetic circuit assembly (30a). An adjusting magnet (61) is fixed to the vibration system (20). At least a portion of the adjusting magnet (61) is located in the magnetic gap of the upper magnetic guide assembly (30b). The adjusting magnet (61) has a first end (61a) and a second end (61b) disposed opposite to each other. The first end (61a) is close to the upper magnetic guide assembly (30b) relative to the second end (61b). The first end (61a) generates a repulsive force with the portion of the upper magnetic guide assembly (30b) facing the first end (61a), and the second end (61b) generates a repulsive force with the portion of the upper magnetic guide assembly (30b) facing the second end (61b).

2. The loudspeaker (100) according to claim 1, characterized in that, The size of the adjusting magnet (61) in a first direction is greater than the size of the magnetic gap of the upper magnetic guide assembly (30b) in the first direction, which is along the thickness direction of the diaphragm (21).

3. The loudspeaker (100) according to claim 1, characterized in that, The distance between the surface of the adjusting magnet (61) facing away from the diaphragm (21) and the diaphragm (21) is a first distance, and the distance between the surface of the voice coil (22) facing away from the diaphragm (21) and the diaphragm (21) is a second distance, wherein the first distance is less than or equal to the second distance.

4. The loudspeaker (100) according to any one of claims 1 to 3, characterized in that, The upper magnetic conductor assembly (30b) includes a first upper magnetic conductor (33) and a second upper magnetic conductor (34), the second upper magnetic conductor (34) surrounds the first upper magnetic conductor (33) and is spaced apart from the first upper magnetic conductor (33), and the gap between the first upper magnetic conductor (33) and the second upper magnetic conductor (34) constitutes at least a portion of the magnetic gap of the upper magnetic conductor assembly (30b); The adjusting magnet (61) is fixedly connected to the side of the voice coil (22). At least a portion of the adjusting magnet (61) is located between the first upper conductor magnet (33) and the second upper conductor magnet (34). The portion of the adjusting magnet (61) facing the first upper conductor magnet (33) is repulsive to the portion of the first upper conductor magnet (33) facing the adjusting magnet (61).

5. The loudspeaker (100) according to claim 4, characterized in that, The adjusting magnet (61) includes a first part (611) and a second part (612) spaced apart. The first part (611) and the second part (612) are both fixedly connected to the side of the voice coil (22) facing the first upper conductor magnet (33), or the first part (611) and the second part (612) are both fixedly connected to the side of the voice coil (22) facing the second upper conductor magnet (34).

6. The loudspeaker (100) according to claim 5, characterized in that, The upper magnetic guide assembly (30b) is provided with a first clearance groove (33a), the opening of the first clearance groove (33a) facing the adjusting magnet (61), and at least a portion of the adjusting magnet (61) is located in the first clearance groove (33a).

7. The loudspeaker (100) according to any one of claims 1 to 3, characterized in that, The upper magnetic conductor assembly (30b) includes a first upper magnetic conductor (33) and a second upper magnetic conductor (34). The second upper magnetic conductor (34) surrounds the first upper magnetic conductor (33) and is spaced apart from the first upper magnetic conductor (33). The first upper magnetic conductor (33) has a first clearance hole (33b). The first clearance hole (33b) penetrates the surface of the first upper magnetic conductor (33) facing the diaphragm (21) and the surface of the first upper magnetic conductor (33) facing away from the diaphragm (21). The first clearance hole (33b) constitutes part of the magnetic gap of the upper magnetic conductor assembly (30b). The loudspeaker (100) also includes a connecting bracket (62), which is located inside the voice coil (22) and is fixedly connected to the diaphragm (21). The adjusting magnet (61) is fixedly connected to the connecting bracket (62). At least a portion of the adjusting magnet (61) is located in the first clearance hole (33b), and the portion of the adjusting magnet (61) facing the first upper conductor magnet (33) is repelled by the portion of the first upper conductor magnet (33) facing the adjusting magnet (61).

8. The loudspeaker (100) according to claim 7, characterized in that, The loudspeaker (100) further includes a lower magnetic conductor (35), a central support (65), a first magnetic element (63), and a second magnetic element (64). The lower magnetic conductor (35) is fixedly connected to the surface of the magnetic circuit assembly (30a) facing away from the upper magnetic conductor assembly (30b). The magnetic circuit assembly (30a) is provided with a second clearance hole (31b), which communicates with the first clearance hole (33b). At least a portion of the lower magnetic conductor (35) is exposed relative to the second clearance hole (31b). The first magnetic component (63) is fixedly connected to the diaphragm (21), the second magnetic component (64) is fixedly connected to the surface of the lower magnetic conductor (35) facing the second clearance hole (31b), the central support (65) is connected between the first magnetic component (63) and the second magnetic component (64), and at least a portion of the adjusting magnet (61) is located between the first upper magnetic conductor (33) and the central support (65); The first magnetic element (63) attracts the adjustment magnet (61), and the second magnetic element (64) attracts the adjustment magnet (61).

9. The loudspeaker (100) according to claim 8, characterized in that, The first magnetic component (63) is a soft magnetic material; Alternatively, the first magnetic element (63) is a permanent magnet, the polarization direction of the first magnetic element (63) is parallel to the thickness direction of the diaphragm (21), and the polarity of the portion of the first magnetic element (63) facing the central support (65) is opposite to the polarity of the portion of the adjusting magnet (61) facing the central support (65).

10. The loudspeaker (100) according to claim 8, characterized in that, The distance from the first magnetic element (63) to the second end (61b) of the adjusting magnet (61) is equal to the distance from the second magnetic element (64) to the second end (61b) of the adjusting magnet (61).

11. The loudspeaker (100) according to claim 9 or 10, characterized in that, The diaphragm (21) includes a vibrating part (211) and a folded ring part. The vibrating part (211) is annular, and the folded ring part connects the inner periphery of the vibrating part (211) and the first magnetic element (63).

12. The loudspeaker (100) according to claim 7, characterized in that, The connecting bracket (62) is made of a non-magnetic material.

13. The loudspeaker (100) according to any one of claims 1 to 3, characterized in that, The projection of the adjusting magnet (61) onto the plane where the upper magnetic guide assembly (30b) is located is symmetrical about the center of the upper magnetic guide assembly (30b).

14. The loudspeaker (100) according to any one of claims 1 to 3, characterized in that, When no current is input to the voice coil (22), the force exerted by the adjusting magnet (61) on the vibration system (20) is 0. When current is input to the voice coil (22), the direction of the force exerted by the adjusting magnet (61) on the vibration system (20) is opposite to the direction of the elastic restoring force of the vibration system (20) itself.

15. An electronic device (1000), characterized in that, It includes a device housing (200) and a speaker (100) according to any one of claims 1 to 14, the speaker (100) being disposed inside the device housing (200).

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