Loudspeaker and electronic equipment

Abstract

The invention provides a loudspeaker and electronic equipment. The loudspeaker comprises a shell, a magnetic circuit system, a vibration system and an adjusting system, the magnetic circuit system is fixed to the shell, an avoiding hole is formed in a middle magnetic circuit of the magnetic circuit system, and the avoiding hole and the magnetic gap are arranged at intervals. A vibrating diaphragm of the vibrating system comprises a first part, a second part and a third part, wherein the third part is connected between the first part and the second part; the adjusting system comprises a first magnetic part, a magnetic attraction part and a second magnetic part. The first magnetic part and the second magnetic part are located on the two opposite sides of the vibrating diaphragm respectively. The second magnetic part is located in the receding hole, and the magnetic attraction part is fixedly connected with the first part. The distance from the magnetic part to the first magnetic part is equal to the distance from the magnetic part to the second magnetic part, and the distance from the first part to the second magnetic part is smaller than the distance from the second part to the second magnetic part. A sinking space is defined by the first part and the third part, and the projection of the first part on the middle magnetic circuit is located in the avoiding hole. The magnetic attraction part generates attraction force with the first magnetic part and the second magnetic part.

Description

Technical Field

[0001] The present application relates to the field of loudspeakers, and in particular to a loudspeaker and an electronic device. Background Art

[0002] Traditional speaker designs usually include a vibration system and a magnetic circuit system. The vibration system includes a diaphragm and a voice coil disposed on the diaphragm. The magnetic circuit system provides a magnetic field for the position where the voice coil is located. When current is input to the voice coil, the voice coil will deviate from its equilibrium position under the action of the Ampere force and move back and forth, pushing the diaphragm to vibrate. At this time, the vibration system will undergo elastic deformation and generate an elastic restoring force to resist the elastic deformation. The elastic restoring force will suppress the vibration of the diaphragm, causing the resonant frequency of the speaker to increase and the low-frequency performance of the speaker to decrease.

[0003] At present, the elastic restoring force of the vibration system is usually reduced by reducing the thickness of the diaphragm surround structure or selecting a material with a lower Young's modulus to prepare the diaphragm surround structure. However, this will cause the voice coil to deflect or tilt left and right when doing reciprocating motion, that is, polarization occurs, causing the voice coil to rub against the magnetic circuit component and produce noise, affecting the acoustic performance of the speaker. Summary of the invention

[0004] The embodiments of the present application provide a loudspeaker and an electronic device, aiming to provide a loudspeaker with smaller voice coil swing and better low-frequency performance, and an electronic device including the loudspeaker.

[0005] In the first aspect, a loudspeaker is provided. The loudspeaker includes a shell, a magnetic circuit system, a vibration system, and an adjustment system. The magnetic circuit system is fixed to the shell. The magnetic circuit system includes an intermediate magnetic circuit and a side magnetic circuit. The intermediate magnetic circuit and the side magnetic circuit are spaced apart. A magnetic gap is formed between the intermediate magnetic circuit and the side magnetic circuit. The intermediate magnetic circuit is provided with an avoidance hole. The avoidance hole is spaced apart from the magnetic gap. The vibration system includes a diaphragm and a voice coil. The diaphragm is fixed to the shell and spaced apart from the magnetic circuit system. The voice coil is fixedly connected to the diaphragm. At least part of the voice coil is located in the magnetic gap. The diaphragm includes a first part, a second part, and a third part. The third part is connected between the first part and the second part. The adjustment system includes a first magnetic part, a magnetic attraction part, and a second magnetic part. The third part is connected between the first part and the second part. A magnetic part and a second magnetic part are respectively located on two opposite sides of the diaphragm and are fixed relative to the shell, the second magnetic part is located in the avoidance hole, the magnetic attraction part is fixedly connected to the first part, in the thickness direction of the diaphragm, the distance from the magnetic attraction part to the first magnetic part is equal to the distance from the magnetic attraction part to the second magnetic part; in the thickness direction of the diaphragm, the distance from the first part to the second magnetic part is smaller than the distance from the second part to the second magnetic part, the first part and the third part enclose a sinking space, and the projection of the first part on the middle magnetic circuit is located in the avoidance hole; at least one of the first magnetic part, the magnetic attraction part and the second magnetic part is a permanent magnet, the first magnetic part and the magnetic attraction part generate attraction, and the second magnetic part and the magnetic attraction part generate attraction.

[0006] It can be understood that the speaker in this embodiment includes an adjustment system, the magnetic attraction part of the adjustment system is fixed to the diaphragm, and the first magnetic part and the second magnetic part of the adjustment system are respectively fixed on the opposite sides of the diaphragm. At least one of the first magnetic part, the magnetic attraction part and the second magnetic part of the adjustment system is a permanent magnet. In the thickness direction of the diaphragm, the distance from the magnetic attraction part to the first magnetic part can be equal to the distance from the magnetic attraction part to the second magnetic part. The magnetic attraction part can be simultaneously subjected to a first attraction force from the first magnetic part and a second attraction force from the second magnetic part. Among them, the direction of the first attraction force is opposite to the direction of the second attraction force. As the absolute value of the displacement of the voice coil relative to its equilibrium position increases, the absolute value of the total force from the first magnetic part and the second magnetic part to the magnetic attraction part also increases, and the absolute value of the force of the magnetic attraction part on the vibration system also increases. The direction of the force of the magnetic attraction part on the vibration system is opposite to the direction of the elastic restoring force of the vibration system itself. In this way, the force of the adjustment system on the vibration system (that is, the total force from the first magnetic part and the second magnetic part to the magnetic attraction part of the adjustment system in this embodiment) can be equivalent to an elastic component, and the stiffness coefficient of the elastic component can be Km. At this time, the resonant frequency F0 of the speaker can be:

[0007]

[0008] It can be seen from the above expression that the force exerted by the adjustment system on the vibration system in this embodiment can offset at least part of the elastic restoring force of the vibration system itself in the speaker, thereby effectively reducing the influence of the elastic restoring force of the vibration system itself on the vibration of the diaphragm. In this way, under the condition that the thickness and material of the diaphragm are exactly the same, the resonant frequency of the speaker in this embodiment is smaller and the low-frequency performance of the speaker is better. In other words, the speaker in this embodiment can meet the stiffness requirements of the vibration system itself while having better low-frequency performance, and the swing of the voice coil is smaller when it moves.

[0009] Secondly, the middle magnetic circuit of the magnetic circuit system in this embodiment has a avoidance hole arranged at intervals from the magnetic gap of the magnetic circuit system, and the second magnetic part of the adjustment system is located in the avoidance hole. At the same time, the first part of the diaphragm is arranged close to the avoidance hole relative to the second part, and the third part of the diaphragm is connected between the first part and the second part, and encloses a sinking space with the first part. The projection of the first part on the middle magnetic circuit can be located in the avoidance hole. The magnetic suction part of the adjustment system can be fixedly connected to the first part of the diaphragm. In this way, by arranging the avoidance hole in the magnetic suction part and cooperating with the sinking space formed on the diaphragm, the adjustment system can be arranged using the thickness space of the magnetic circuit system, thereby reducing the overall thickness of the speaker. In other words, the speaker in this embodiment can achieve a thin setting while having better low-frequency performance.

[0010] In a possible implementation, the spacing between the first part and the second magnetic part is greater than 0.12 mm, and the spacing between the third part and the magnetic circuit system is greater than 0.12 mm. In this way, there is a certain spacing between the first part and the second magnetic part, and there is a certain spacing between the third part and the magnetic circuit system, so as to avoid the vibration film from rubbing against the magnetic circuit system or the second magnetic part during vibration to produce abnormal noise, thereby affecting the normal operation of the speaker.

[0011] In a possible implementation, the speaker further includes a first magnetic conductive sheet, the first magnetic conductive sheet is fixedly connected to the surface of the magnetic circuit system facing away from the diaphragm and the shell, the avoidance hole exposes at least a portion of the first magnetic conductive sheet, and the second magnetic part is fixedly connected to the first magnetic conductive sheet. It can be understood that under the condition that the force between the second magnetic part and the magnetic attraction part is the same, this embodiment increases the magnetic induction intensity between the second magnetic part and the magnetic attraction part by setting the first magnetic conductive sheet, thereby effectively reducing the thickness of the second magnetic part itself, which is conducive to realizing a thin setting of the speaker.

[0012] In a possible implementation, the speaker further includes a second magnetic conductive sheet, at least a portion of which is located on a side of the first magnetic portion facing away from the magnetic attraction portion, and is fixedly connected to the first magnetic portion and the housing. It is understandable that, under the condition that the forces between the first magnetic portion and the magnetic attraction portion are of the same magnitude, this embodiment increases the magnetic induction intensity between the first magnetic portion and the magnetic attraction portion by providing the second magnetic conductive sheet, thereby effectively reducing the thickness of the first magnetic portion itself, which is conducive to achieving a thinner speaker setting.

[0013] In one possible implementation, the second magnetic conductive sheet includes a main body and an annular portion, the annular portion is connected to the outer periphery of the main body, the main body is located on the side of the first magnetic portion facing away from the magnetic attraction portion, and is fixedly connected to the first magnetic portion and the shell, and the annular portion is arranged around the first magnetic portion. In this way, the second magnetic conductive sheet can half-surround the first magnetic portion, thereby better enhancing the magnetic induction intensity between the first magnetic portion and the magnetic attraction portion. Under the condition that the magnetic induction intensity between the first magnetic portion and the magnetic attraction portion is the same, the thickness of the first magnetic portion in this embodiment can be thinner, which is conducive to realizing a thin setting of the speaker.

[0014] In a possible implementation, the magnetic attraction portion is fixedly connected to the surface of the first part facing the avoidance hole. In this way, under the condition that the distance from the magnetic attraction portion to the first magnetic portion is the same, compared with the surface of the first part of the diaphragm facing the first magnetic portion, the first part is sunken relative to the second part, that is, the size of the sunken space surrounded by the first part and the third part of the diaphragm is larger, the stretching amount during the preparation of the diaphragm is larger, and the preparation difficulty is greater. In this embodiment, the magnetic attraction portion is fixed to the surface of the first part of the diaphragm facing away from the first magnetic portion, so that the first part is sunken relative to the second part. That is, the size of the sunken space surrounded by the first part and the third part of the diaphragm is smaller, which is conducive to reducing the stretching amount of the diaphragm, reducing the difficulty of preparing the diaphragm, and improving production efficiency and product yield. At the same time, when the rear cavity of the speaker is a closed space, the magnetic attraction portion is fixed to the surface of the first part of the diaphragm facing away from the first magnetic portion, so that the magnetic attraction portion can also be located in the rear cavity of the speaker, which is conducive to improving the waterproof ability of the magnetic attraction portion and extending the service life of the speaker.

[0015] In a possible implementation, both the first magnetic part and the second magnetic part are permanent magnets, and a portion of the first magnetic part facing the second magnetic part and a portion of the second magnetic part facing the first magnetic part are attracted to each other.

[0016] It can be understood that the first magnetic part and the second magnetic part of the speaker in this embodiment can both be permanent magnets. The polarization direction of the first magnetic part and the polarization direction of the second magnetic part can be the same, and both are parallel to the thickness direction of the diaphragm. That is, the part of the first magnetic part facing the second magnetic part can be attracted to the part of the second magnetic part facing the first magnetic part. In this way, the force between the first magnetic part and the second magnetic part is an attractive force. Compared with the speaker in which the force between the first magnetic part and the second magnetic part is a repulsive force, during its assembly process, due to the repulsive force generated between the first magnetic part and the second magnetic part, when the first magnetic part is installed after the second magnetic part is installed, the first magnetic part is fixed in the direction toward the second magnetic part. The repulsive force is received from the second magnetic part, and the direction of the repulsive force is opposite to the installation direction of the first magnetic part, thereby causing the first magnetic part to produce an assembly tolerance. In the present embodiment, the acting force between the first magnetic part and the second magnetic part is an attractive force. When the first magnetic part is fixed in a direction toward the second magnetic part, the direction of the attractive force between the first magnetic part and the second magnetic part is the same as the installation direction of the first magnetic part. This effectively avoids the problem of assembly tolerance caused by the repulsive force from the second magnetic part during the assembly process of the first magnetic part, which is beneficial to improving the product yield of the speaker.

[0017] In one possible implementation, the magnetic attraction part is a soft magnet; or, the magnetic attraction part is a permanent magnet, and the part of the magnetic attraction part facing the first magnetic part attracts the part of the first magnetic part facing the magnetic attraction part. In this way, when the magnetic attraction part is a soft magnet, under the condition that the volume of the magnetic attraction part is the same, the density of the magnetic attraction part is smaller, so that the mass of the magnetic attraction part is smaller, thereby reducing the pulling of the diaphragm by the magnetic attraction part and avoiding deformation of the diaphragm. When the magnetic attraction part is a permanent magnet, the magnetic induction intensity between the magnetic attraction part and the first magnetic part is large, and the magnetic induction intensity between the magnetic attraction part and the second magnetic part is also large. Under the condition that the magnetic induction intensity between the magnetic attraction part and the first magnetic part is the same, and the magnetic induction intensity between the magnetic attraction part and the second magnetic part is also the same, the thickness of the first magnetic part and the second magnetic part can be reduced, which is conducive to realizing a thin setting of the speaker.

[0018] In a possible implementation, the speaker further includes a first gasket, which is located between the first magnetic portion and the magnetic attraction portion and is fixedly connected to the first magnetic portion or the magnetic attraction portion. It is understandable that by arranging the first gasket between the first magnetic portion and the magnetic attraction portion, it is possible to effectively avoid the problem that when the magnetic attraction portion moves closer to the first magnetic portion or the second magnetic portion, the attraction between the two is too large, causing the magnetic attraction portion to be adsorbed on the first magnetic portion or the second magnetic portion, thereby affecting the normal operation of the speaker.

[0019] In one possible implementation, the first magnetic part includes a first middle magnet and a first side magnet, and a first gap is formed between the first middle magnet and the first side magnet; the magnetic attraction part is provided with at least one through hole, and the projection of the first gap on the magnetic attraction part along the thickness direction of the diaphragm is arranged at an interval with the through hole.

[0020] It can be understood that in the present embodiment, there is a first gap between the first middle magnet and the first side magnet of the first magnetic part. The magnetic induction intensity of the first magnetic part near the first gap is relatively strong. The magnetic attraction part has at least one through hole, and the projection of the first gap of the first magnetic part on the magnetic attraction part along the thickness direction of the diaphragm can be spaced apart from the through hole. In this way, the through hole of the magnetic attraction part can avoid the area with relatively strong magnetic induction intensity of the first magnetic part, that is, the magnetic attraction part itself can be located in the area with relatively strong magnetic induction intensity of the first magnetic part, so that the mass of the magnetic attraction part can be reduced while ensuring the force between the first magnetic part and the magnetic attraction part, so as to reduce the influence of the magnetic attraction part on the vibration of the diaphragm. In addition, the overall mass of the speaker is relatively light, which is conducive to realizing a lightweight setting of the speaker.

[0021] In a possible implementation, the projection of the magnetic attraction portion on the plane where the diaphragm is located is symmetrically arranged about the center of the diaphragm. In this way, the force exerted by the magnetic attraction portion on the diaphragm can act on the center of the diaphragm, thereby ensuring the torque balance of the vibration system and preventing the force exerted by the magnetic attraction portion on the diaphragm from deviating from the center of the diaphragm, causing the diaphragm to deflect during the vibration process, affecting the normal operation of the speaker.

[0022] In a possible implementation, the first magnetic part and the second magnetic part are symmetrically arranged with respect to the magnetic attraction part. In this way, the force between the first magnetic part and the magnetic attraction part and the force between the second magnetic part and the magnetic attraction part can be on the same straight line, thereby preventing the magnetic attraction part from being deflected due to the forces on different straight lines, thereby affecting the normal movement of the diaphragm.

[0023] In a possible implementation, when no current is input to the voice coil, the force exerted by the regulating system on the vibration system is such that when current is input to the voice coil, the direction of the force exerted by the regulating system on the vibration system is opposite to the direction of the elastic restoring force of the vibration system itself. In this way, the force exerted by the regulating system on the vibration system is opposite to the elastic restoring force of the vibration system itself, thereby offsetting at least part of the elastic restoring force of the vibration system and improving the low-frequency performance of the speaker.

[0024] In a second aspect, an electronic device is provided. The electronic device includes a device housing and the above-mentioned speaker, and the speaker is arranged in the device housing. The speaker in the electronic device of this embodiment can meet the stiffness requirements of the vibration system itself while having good low-frequency performance, and the swing of the voice coil is small when it moves. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the implementation methods of the present application or the background technology, the drawings required for use in the implementation methods of the present application or the background technology will be described below.

[0026] Figure 1 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0027] Figure 2 yes Figure 1 A schematic structural diagram of a speaker of an electronic device in one embodiment is shown;

[0028] Figure 3 yes Figure 2 A schematic diagram of the exploded structure of a loudspeaker in some embodiments is shown;

[0029] Figure 4 yes Figure 3 The schematic diagram of the exploded structure of the magnetic circuit system and the first magnetic conductive sheet shown;

[0030] Figure 5 yes Figure 4 A schematic diagram of the assembly structure of the structure shown;

[0031] Figure 6 yes Figure 2 The illustrated schematic diagram of a partial cross-sectional structure of a loudspeaker in one embodiment cut along AA;

[0032] Figure 7 yes Figure 3 The schematic diagram of the exploded structure of the vibration system shown;

[0033] Figure 8 yes Figure 7 A schematic diagram of the assembly structure of the structure shown;

[0034] Fig. 9 yes Figure 2 The illustrated schematic diagram of a partial cross-sectional structure of a loudspeaker in one embodiment cut along AA;

[0035] Fig.10 yes Figure 3 The schematic diagram of the exploded structure of the vibration system, magnetic circuit system and support shown;

[0036] Fig.11 yes Fig.10 A schematic diagram of the assembly structure of the structure shown;

[0037] Fig.12 yes Figure 2 The illustrated schematic diagram of a partial cross-sectional structure of a loudspeaker in one embodiment cut along AA;

[0038] Fig.13 yes Figure 2 The cross-sectional structure diagram of a loudspeaker in one embodiment cut along AA is shown;

[0039] Fig.14 yes Fig.13 The structure shown is a schematic diagram of the cross-section structure after the shell is hidden;

[0040] Fig.15a yes Fig.14 The structure shown is a simplified schematic diagram of part of the structure when the voice coil is in a balanced position;

[0041] Fig.15b yes Fig.14 A schematic diagram of a magnetic field simulation of a portion of the structure shown when the voice coil is in a balanced position;

[0042] Fig.16a yes Fig.14 The structure shown is a simplified schematic diagram of a portion of the structure at one moment when the voice coil is input with a first current;

[0043] Fig.16b yes Fig.14 A schematic diagram of magnetic field simulation of a part of the structure shown in the figure at one moment when a first current is input into the voice coil;

[0044] Fig.17a yes Fig.14 The structure shown is a simplified schematic diagram of a portion of the structure at one moment when the second current is input into the voice coil;

[0045] Fig.17b yes Fig.14 A schematic diagram of magnetic field simulation of a part of the structure shown in the figure at one moment when a second current is input into the voice coil;

[0046] Fig.18 yes Fig.14 A schematic diagram of a simulation curve showing the displacement of the voice coil of the loudspeaker and the force exerted by the adjustment system on the vibration system;

[0047] Fig.19 yes Fig.14 A schematic diagram showing a comparison between a simulation curve of the displacement of the voice coil of a loudspeaker and the total stiffness coefficient of a vibration system and a simulation curve of the displacement of the voice coil of a general loudspeaker and the total stiffness coefficient of a vibration system;

[0048] Fig. 20 yes Fig.14 The schematic diagram of the simulation of the frequency response curve of the loudspeaker shown and the general loudspeaker;

[0049] Fig.21a yes Fig.15a The structure shown is a simplified schematic diagram of other embodiments;

[0050] Figure 21b yes Fig.15a The structure shown is a simplified schematic diagram of other embodiments;

[0051] Fig. 22 yes Fig.15a A simplified schematic diagram of the structure shown in another embodiment;

[0052] Fig.23 yes Fig. 22 The structure shown is a simplified schematic diagram of other embodiments;

[0053] Fig.24 yes Fig. 22 The structure shown is a simplified schematic diagram of other embodiments;

[0054] Fig.25 yes Fig.15a The structure shown is a simplified schematic diagram of yet another embodiment. DETAILED DESCRIPTION

[0055] The embodiments of the present application are described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0056] In the description of the implementation mode of the present application, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation" and "connection" should be understood in a broad sense. 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. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. The directional terms mentioned in the implementation mode of the present application, such as "upper", "lower", "inner", "outer", etc., are only referenced to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the implementation mode of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the implementation mode of the present application. "Multiple" means at least two.

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

[0058] In the implementation manner of the present application, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0059] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in another embodiment", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0060] It is to be understood that the specific implementations described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings.

[0061] Figure 1 It is a structural diagram of an electronic device 1000 provided in an embodiment of the present application.

[0062] like Figure 1 As shown, the electronic device 1000 may be a mobile phone, a tablet computer, a multimedia player, a headset, a stereo, a laptop computer, a vehicle-mounted device, a foldable terminal device, a television or a wearable device, or other devices with a speaker and / or a microphone. The wearable device may be a smart bracelet, a smart watch, a smart head display, smart glasses, etc. Figure 1 The electronic device 1000 in the illustrated embodiment is described by taking a mobile phone as an example.

[0063] Exemplarily, 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, wherein the frame 201 is connected to the back cover 202 and is arranged around the back cover 202. The frame 201 is provided with a sound outlet 203. The number of the sound outlet 203 may be one or more. Figure 1 The number of the sound outlet holes 203 shown in the figure is multiple. In other embodiments, the sound outlet holes 203 can also be set in the back cover 202.

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

[0065] Exemplarily, the speaker 100 may be located inside the electronic device 1000. Figure 1 The speaker 100 is indicated by a dotted 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, and the multiple speakers 100 can be used to emit sounds of multiple tracks to form stereo. It should be noted that Figure 1 Some components of the electronic device 1000 are shown schematically only, and the actual shapes and sizes of these components are not subject to Figure 1 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] Figure 2 yes Figure 1 The structure diagram of the speaker 100 of the electronic device 1000 shown in one embodiment. Figure 3 yes Figure 2 The illustrated schematic diagram is an exploded structural diagram of the speaker 100 in some embodiments.

[0067] like Figure 2 and Figure 3 As shown, the speaker 100 may include a housing 10, a vibration system 20, a magnetic circuit system 30, a support 40, an adjustment system 50, a first magnetic conductive sheet 60, and a second magnetic conductive sheet 70. The vibration system 20 may include a diaphragm 21 and a voice coil 22. The magnetic circuit system 30 may include an intermediate magnetic circuit 31 and a side magnetic circuit 32. In some embodiments, the speaker 100 may also not include the first magnetic conductive sheet 60 and / or the second magnetic conductive sheet 70.

[0068] Exemplarily, the vibration system 20 can be spaced apart from the magnetic circuit system 30. The magnetic circuit system 30 can have a magnetic gap 33. At least a portion of the voice coil 22 can be located in the magnetic gap 33. When current is input to the voice coil 22, the voice coil 22 can be affected by the magnetic field force of the magnetic circuit system 30, generate an Ampere force parallel to the thickness direction of the diaphragm 21, and move along the direction to cut the magnetic flux lines. The voice coil 22 can push the diaphragm 21 to move back and forth along the direction. That is, the diaphragm 21 can vibrate under the action of the voice coil 22.

[0069] It is understandable that when the diaphragm 21 vibrates, the elastic restoring force of the vibration system 20 itself will suppress the vibration of the diaphragm 21, resulting in a higher resonant frequency F0 of the speaker 100 and poor low-frequency performance of the speaker 100. In this embodiment, by providing an adjustment system 50, the adjustment system 50 can generate a force on the vibration system 20, and the direction of the force is opposite to the direction of the elastic restoring force of the vibration system 20 itself, thereby offsetting at least part of the elastic restoring force of the vibration system 20 and reducing the influence of the elastic restoring force on the low-frequency performance of the speaker 100. The specific structure of the speaker 100 and how the adjustment system 50 improves the low-frequency performance of the speaker 100 will be described in detail below in conjunction with the relevant drawings.

[0070] Figure 4 yes Figure 3 The schematic diagram of the exploded structure of the magnetic circuit system 30 and the first magnetic conductive sheet 60 is shown. Figure 5 yes Figure 4 Schematic diagram of the assembly structure of the structure shown. Figure 6 yes Figure 2 The illustrated diagram is a partial cross-sectional structural diagram of an embodiment of the loudspeaker 100 cut along AA.

[0071] like Figures 4 to 6As shown, the side magnetic circuit 32 can be arranged around the middle magnetic circuit 31 and spaced apart from the middle magnetic circuit 31. At this time, a magnetic gap 33 of the magnetic circuit system 30 is formed between the middle magnetic circuit 31 and the side magnetic circuit 32. The side magnetic circuit 32 can include a plurality of spaced-apart sub-magnetic circuits. The plurality of spaced-apart sub-magnetic circuits can spaced apart and surround the middle magnetic circuit 31. In other embodiments, the side magnetic circuit 32 can also be roughly annular. At this time, the side magnetic circuit 32 can be arranged completely around the middle magnetic circuit 31.

[0072] Exemplarily, the middle magnetic circuit 31 may include a middle magnet 311 and a middle magnetic conductor 312. The middle magnetic conductor 312 may be fixedly connected to the surface of the middle magnet 311. The side magnetic circuit 32 may include a side magnet 321 and a side magnetic conductor 322. The side magnetic conductor 322 may be fixedly connected to the surface of the side magnet 321. Among them, the materials of the middle magnet 311 and the side magnet 321 may both be hard magnetic materials, also called permanent magnetic materials (permanent magnets) or permanent magnetic materials (permanent magnets), that is, the middle magnet 311 and the side magnet 321 may both be permanent magnets. It can be understood that hard magnetic materials are permanent magnetic materials that can retain magnetism for a long time. For example, magnets, etc. The materials of the middle magnetic conductor 312 and the side magnetic conductor 322 may both be magnetic conductive materials.

[0073] Exemplarily, the edge magnet 321 can be arranged around the middle magnet 311 and spaced apart from the middle magnet 311. Among them, the edge magnet 321 can include a plurality of small magnets. The plurality of small magnets can be spaced apart around the outer peripheral side of the middle magnet 311. The edge magnet 322 can be roughly annular. The edge magnet 322 can be fixedly connected to the surface of the same side of the plurality of small magnets. In some embodiments, the edge magnet 321 can also be roughly annular. At this time, the edge magnet 321 can be arranged completely around the outer peripheral side of the middle magnet 311.

[0074] Exemplarily, the intermediate magnetic circuit 31 may be provided with an avoidance hole 313. The avoidance hole 313 may be spaced apart from the magnetic gap 33 of the magnetic circuit system 30. Among them, the intermediate magnet 311 may be provided with a first hole 311a. The intermediate magnet 311 may be roughly annular. The intermediate magnetic conductor 312 may be provided with a second hole 312a. The intermediate magnetic conductor 312 may be roughly annular. The first hole 311a may be connected to the second hole 312a. The first hole 311a and the second hole 312a may together constitute the avoidance hole 313 of the intermediate magnetic circuit 31.

[0075] Exemplarily, the first magnetic conductive sheet 60 can be fixedly connected to the surface of the middle magnet 311 facing away from the middle magnetic conductive sheet 312, and the surface of the side magnet 321 facing away from the side magnetic conductive sheet 322. A portion of the first magnetic conductive sheet can be exposed relative to the avoidance hole 313 of the middle magnetic circuit 31. A portion of the first magnetic conductive sheet 60 can also be exposed relative to the magnetic gap 33 between the middle magnetic circuit 31 and the side magnetic circuit 32.

[0076] Figure 7 yes Figure 3 The exploded structural diagram of the vibration system 20 is shown. Figure 8 yes Figure 7 Schematic diagram of the assembly structure of the structure shown. Fig. 9 yes Figure 2 The illustrated diagram is a partial cross-sectional structural diagram of an embodiment of the loudspeaker 100 cut along AA.

[0077] like Figures 7 to 9 As shown, the diaphragm 21 can be a flat diaphragm, or a diaphragm with a folded ring structure. Exemplarily, the diaphragm 21 can be a diaphragm with a folded ring structure. Among them, the diaphragm 21 can include a vibration part 211 and a folded ring part 212. The folded ring part 212 can be fixedly connected to the outer peripheral edge of the vibration part 211. At least part of the folded ring part 212 can be arched toward one side of the diaphragm 21 to form a folded ring structure. It should be understood that the outer peripheral edge of the vibration part 211 can be the outer peripheral side surface of the vibration part 211, or it can be a part of the vibration part 211 close to its outer peripheral side surface. In this embodiment, the outer peripheral edge of the vibration part 211 can be the part of the vibration part 211 close to its outer peripheral side surface. The vibration part 211 and the folded ring part 212 can be a split structure. In other embodiments, the outer peripheral edge of the vibration part 211 can also be the outer peripheral side surface of the vibration part 211. That is, the folded ring part 212 can be fixedly connected to the outer peripheral side surface of the vibration part 211. In some embodiments, the vibration portion 211 and the folding ring portion 212 may also be integrally formed, that is, the diaphragm 21 may be an integrally formed structure.

[0078] Exemplarily, the voice coil 22 may be roughly annular in structure. The voice coil 22 may be fixedly connected to the vibration portion 211 of the diaphragm 21. The folded ring portion 212 may be arched along a side facing the voice coil 22. In some embodiments, the vibration system 20 may further include a connecting bracket 23. One end of the connecting bracket 23 may be fixedly connected to the surface of the voice coil 22 facing the diaphragm 21. The other end of the connecting bracket 23 may be fixedly connected to the diaphragm 21. In other words, the folded ring portion 212 of the diaphragm 21 may be indirectly connected to the vibration portion 211 of the diaphragm 21 via the connecting bracket 23.

[0079] Fig.10 yes Figure 3 The schematic diagram of the exploded structure of the vibration system 20, the magnetic circuit system 30 and the support member 40 is shown. Fig.11 yes Fig.10 Schematic diagram of the assembly structure of the structure shown. Fig.12 yes Figure 2 The illustrated diagram is a partial cross-sectional structural diagram of an embodiment of the loudspeaker 100 cut along AA.

[0080] like Figures 10 to 12As shown, the vibration system 20 and the magnetic circuit system 30 can be respectively located on opposite sides of the support member 40 and fixedly connected to the support member 40. Among them, the support member 40 can be roughly annular. The folded ring portion 212 of the diaphragm 21 of the vibration system 20 can be fixedly connected to the support member 40. The voice coil 22 can be located in the annular space of the support member 40. The surface of the support member 40 facing away from the diaphragm 21 can be fixedly connected to the magnetic circuit system 30. At this time, at least part of the voice coil 22 can be located in the magnetic gap 33 of the magnetic circuit system 30. At this time, the first magnetic conductive sheet 60 can be located on the side of the magnetic circuit system 30 facing away from the diaphragm 21.

[0081] In some embodiments, the speaker 100 may further include an electrical connector (not shown). One end of the electrical connector may be electrically connected to the voice coil 22, and the other end may be electrically connected to an external device of the speaker 100 (e.g., a battery of an electronic device, etc.). In this way, the external device of the speaker 100 may transmit a current signal to the voice coil 22 through the electrical connector. The electrical connector may be a device that can transmit a current signal, such as a wire or a circuit board.

[0082] Fig.13 yes Figure 2 The illustrated schematic diagram is a cross-sectional structural diagram of a loudspeaker 100 in one embodiment cut along AA. Fig.14 yes Fig.13 The structure shown is a schematic diagram of the cross-sectional structure behind the hidden shell 10 .

[0083] like Fig.13 and Fig.14 As shown, the housing 10 may include a frame 11 and a bottom 12. The frame 11 may be fixedly connected to the outer periphery of the bottom 12. At this time, the frame 11 and the bottom 12 may surround an inner cavity 13 of the housing 10. Figure 3 The frame portion 11 and the bottom portion 12 of the housing 10 are also illustrated.

[0084] Exemplarily, the vibration system 20 can be fixedly connected to the frame 11 of the housing 10. Among them, the folding ring portion 212 of the diaphragm 21 can be fixedly connected to the inner peripheral side of the frame 11. At this time, the diaphragm 21 can separate the inner cavity 13 of the housing 10 into a front cavity 13a and a rear cavity 13b that are not connected to each other. The front cavity 13a can be located on the side of the diaphragm 21 facing away from the voice coil 22. The rear cavity 13b can be located on the side of the diaphragm 21 facing the voice coil 22.

[0085] For example, the first magnetic conductive sheet 60 can be fixedly connected to the bottom 12 of the housing 10. At this time, the magnetic circuit system 30 can be located in the rear cavity 13b of the housing 10. In some embodiments, the bottom 12 can also be provided with a first mounting hole 121 ( Figure 3The first mounting hole 121 of the bottom 12 is also shown. The first magnetic conductive sheet 60 can be fixed to the first mounting hole 121. In this way, the first magnetic conductive sheet 60 can utilize the thickness of the bottom 12 of the housing 10, which is conducive to reducing the overall thickness of the speaker 100.

[0086] Exemplarily, the frame portion 11 of the housing 10 may be provided with a second mounting hole 111. The projection of the second mounting hole 111 in the thickness direction of the diaphragm 21 may cover the avoidance hole 313 of the intermediate magnetic circuit 31. The second magnetic conductive sheet 70 may be located in the second mounting hole 111 and fixedly connected to the frame portion 11 of the housing 10. In this way, by providing the second mounting hole 111 and arranging the second magnetic conductive sheet 70 in the second mounting hole 111, the second mounting hole 111 may utilize the thickness dimension of the housing 10 itself, which is conducive to reducing the overall thickness of the speaker 100. In some embodiments, the housing 10 may not be provided with the second mounting hole 111. The second magnetic conductive sheet 70 may also be directly fixed to the surface of the housing 10 facing the avoidance hole 313.

[0087] Exemplarily, the vibration part 211 of the diaphragm 21 may include a first part 211a, a second part 211b and a third part 211c. The first part 211a may be closer to the avoidance hole 313 of the intermediate magnetic circuit 31 relative to the second part 211b. In the thickness direction of the diaphragm 21, the distance from the second part 211b to the second magnetic part 53 may be greater than the distance from the first part 211a of the diaphragm 21 to the second magnetic part 53. The third part 211c may be connected between the first part 211a and the second part 211b. Among them, the second part 211b and the third part 211c may be roughly annular. The third part 211c may connect the inner periphery of the second part 211b and the outer periphery of the first part 211a. At this time, the first part 211a, the second part 211b and the third part 211c may jointly enclose the sinking space 213. The projection of the first part 211a on the intermediate magnetic circuit 31 may be located in the avoidance hole 313. It should be understood that although the vibration part 211 of the diaphragm 21 is divided into three parts in this embodiment, it does not affect the vibration part 211 of the diaphragm 21 being an integrally formed structure, that is, the first part 211a, the second part 211b and the third part 211c of the vibration part 211 can be integrally formed. For example, the vibration part 211 of the diaphragm 21 can be prepared by stamping, stretching, etc.

[0088] Exemplarily, the adjustment system 50 may include a first magnetic portion 51, a magnetic attraction portion 52, and a second magnetic portion 53. The first magnetic portion 51 may be fixedly connected to the surface of the second magnetic conductive sheet 70 facing the first portion 211a of the diaphragm 21. The second magnetic portion 53 may be located in the avoidance hole 313 of the magnetic attraction portion 52, and fixedly connected to the first magnetic conductive sheet 60. The magnetic attraction portion 52 may be fixedly connected to the first portion 211a of the vibration portion 211. The magnetic attraction portion 52 may be located in the sinking space 213. That is, the magnetic attraction portion 52 may be fixedly connected to the surface of the first portion 211a facing away from the avoidance hole 313. Among them, in the thickness direction of the diaphragm 21, the distance from the magnetic attraction portion 52 to the first magnetic portion 51 is the first distance D1. The distance from the magnetic attraction portion 52 to the second magnetic portion 53 is the second distance D2.

[0089] Exemplarily, the material of the magnetic attraction portion 52 can be a soft magnetic material, that is, the magnetic attraction portion 52 can be a soft magnet. It can be understood that the soft magnetic material is a magnetic material that is easy to magnetize and easy to demagnetize, such as soft iron. The materials of the first magnetic portion 51 and the second magnetic portion 53 can both be hard magnetic materials, that is, the first magnetic portion 51 and the second magnetic portion 53 can be permanent magnets. Among them, the polarization direction of the first magnetic portion 51 can be parallel to the thickness direction of the diaphragm 21. The polarization direction of the second magnetic portion 53 can be parallel to the thickness direction of the diaphragm 21. The polarization direction of the first magnetic portion 51 can be opposite to the polarization direction of the second magnetic portion 53.

[0090] Exemplarily, both the first magnetic part 51 and the second magnetic part 53 may include a plurality of small permanent magnets. For example, the first magnetic part 51 may include a first middle magnet 511 and two first side magnets 512. The second magnetic part 53 may include a second middle magnet 531 and two second side magnets 532. In the present embodiment, taking the first magnetic part 51 as an example, the polarization direction of the first middle magnet 511 of the first magnetic part 51 may be parallel to the thickness direction of the diaphragm 21. The polarity of the end of the first middle magnet 511 of the first magnetic part 51 facing the diaphragm 21 may be an S pole, and the polarity of the end of the first middle magnet 511 of the first magnetic part 51 facing away from the diaphragm 21 may be an N pole. The polarization directions of the two first side magnets 512 of the first magnetic part 51 may be the same and opposite to the polarization direction of the first middle magnet 511. In other words, the polarity of the end of the first side magnet 512 of the first magnetic part 51 facing the diaphragm 21 may be an N pole. The overall polarization direction of the first magnetic part 51 can be parallel to the thickness direction of the diaphragm 21. The magnetic circuit setting of the second magnetic part 53 can be mirror-symmetrical with the magnetic circuit setting of the first magnetic part 51 about the plane where the magnetic attraction part 52 is located. At this time, the overall polarization direction of the second magnetic part 53 can be parallel to the thickness direction of the diaphragm 21 and opposite to the polarization direction of the first magnetic part 51. A force can be generated between the first magnetic part 51 and the second magnetic part 53, and the force can be a repulsive force.

[0091] It should be understood that Fig.14 The following figures only illustrate one embodiment of the magnetic circuit arrangement of the first magnetic part 51 and the second magnetic part 53 of the adjustment system 50. The first magnetic part 51 and the second magnetic part 53 may also adopt other magnetic circuit arrangements, such as the Halbach array, etc., which is not specifically limited in the present application.

[0092] Fig.15a yes Fig.14 The structure shown is a simplified schematic diagram of part of the structure when the voice coil 22 is in a balanced position. Fig.15b yes Fig.14 The structure shown is a schematic diagram of magnetic field simulation of a part of the structure when the voice coil 22 is in a balanced position.

[0093] like Fig.15a and Fig.15b As shown, the magnetic attraction portion 52 of the adjustment system 50 can be subjected to the attraction from the first magnetic portion 51 and the attraction from the second magnetic portion 53. Among them, the attraction from the first magnetic portion 51 to the magnetic attraction portion 52 is the first attraction. The direction of the first attraction is the first direction. The first direction can be the direction in which the magnetic attraction portion 52 points to the first magnetic portion 51. The first direction can be parallel to the thickness direction of the diaphragm 21. The attraction from the second magnetic portion 53 to the magnetic attraction portion 52 is the second attraction. The direction of the second attraction is the second direction. The second direction can be the direction in which the magnetic attraction portion 52 points to the first magnetic portion 51. The second direction can be parallel to the thickness direction of the diaphragm 21. In other words, the first direction can be opposite to the second direction.

[0094] When no current is input to the voice coil 22 and the voice coil 22 is in a balanced position, the diaphragm 21 does not deform. At this time, the elastic restoring force of the vibration system 20 itself is 0. The distance from the magnetic attraction part 52 of the adjustment system 50 to the first magnetic part 51 (that is, the first distance D1 in this embodiment) and the distance from the magnetic attraction part 52 to the second magnetic part 53 (that is, the second distance D2 in this embodiment) can be equal. Among them, equality can be completely equal or approximately equal, and the error between the first distance D1 and the second distance D2 can be within a certain range, for example, the error between the first distance D1 and the second distance D2 can be within 0.1 mm. At this time, the first attraction force and the second attraction force exerted on the magnetic attraction part 52 are equal in magnitude and opposite in direction. That is, the first attraction force and the second attraction force can offset each other. The force exerted by the first magnetic part 51 and the second magnetic part 53 on the magnetic attraction part 52 can be 0. At this time, the force exerted by the adjustment system 50 on the vibration system 20 can be 0.

[0095] Fig.16a yes Fig.14 The structure shown is a simplified schematic diagram of a portion of the structure at a time when the voice coil 22 is input with a first current. Fig.16b yes Fig.14The structure shown is a schematic diagram of magnetic field simulation of a part of the structure at a certain moment when the voice coil 22 is input with a first current.

[0096] like Fig.16a and Fig.16b As shown, when the voice coil 22 inputs the first current, the voice coil 22 can move along the first direction and push the diaphragm 21 to move along the first direction. At this time, the magnetic attraction portion 52 can move along the first direction with the diaphragm 21. As the displacement of the magnetic attraction portion 52 moving along the first direction gradually increases, the first distance D1 between the magnetic attraction portion 52 and the first magnetic portion 51 can gradually decrease, and the second distance D2 between the magnetic attraction portion 52 and the second magnetic portion 53 can gradually increase. At the same time, the first attraction force on the magnetic attraction portion 52 can gradually increase, and the second attraction force on the magnetic attraction portion 52 can gradually decrease.

[0097] When the magnetic attraction part 52 moves along the first direction with the diaphragm 21 to the point where the first distance D1 is less than the second distance D2, the diaphragm 21 may 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 the elastic restoring force is opposite to the direction in which the diaphragm 21 bulges (in this embodiment, that is, the direction of the elastic restoring force of the vibration system 20 is the second direction at this time). The first attractive force exerted on the magnetic attraction part 52 may be greater than the second attractive force exerted on the magnetic attraction part 52. At this time, the direction of the total force exerted on the magnetic attraction part 52 from the first magnetic part 51 and the second magnetic part 53 may be along the first direction. That is, the direction of the force exerted by the adjustment system 50 on the vibration system 20 may be along the first direction. The direction of the force exerted by the adjustment system 50 on the vibration system 20 is opposite to the direction of the elastic restoring force of the vibration system 20 itself.

[0098] Fig.17a yes Fig.14 The structure shown is a simplified schematic diagram of a portion of the structure at a time when the second current is input into the voice coil 22 . Fig.17b yes Fig.14 The structure shown is a schematic diagram of magnetic field simulation of a part of the structure at a certain moment when the second current is input into the voice coil 22 .

[0099] like Fig.17a and Fig.17b As shown, when the voice coil 22 inputs the second current, the voice coil 22 can move in the second direction and push the diaphragm 21 to move in the second direction. At this time, the magnetic attraction portion 52 can move in the second direction together with the diaphragm 21. As the position of the magnetic attraction portion 52 moving in the second direction gradually increases, the first distance D1 between the magnetic attraction portion 52 and the first magnetic portion 51 can gradually increase, and the second distance D2 between the magnetic attraction portion 52 and the second magnetic portion 53 can gradually decrease. At the same time, the first attraction force on the magnetic attraction portion 52 can gradually decrease, and the second attraction force on the magnetic attraction portion 52 can gradually increase.

[0100] When the magnetic attraction portion 52 moves along the second direction with the diaphragm 21 to a point where the first distance D1 is greater than the second distance D2, the diaphragm 21 may bulge along the second direction and deform. At this time, a portion of the sinking space 213 of the diaphragm 21 may be located in the avoidance hole 313 (please refer to the embodiment of FIG. 3 ). Fig.14 As shown). The vibration system 20 itself has an elastic restoring force for resisting the vibration of the vibration system 20. The direction of the elastic restoring force is opposite to the direction of the protrusion of the diaphragm 21 (in the present embodiment, that is, the direction of the elastic restoring force of the vibration system 20 is the first direction at this time). The first attractive force received by the magnetic attraction part 52 may be smaller than the second attractive force received by the magnetic attraction part 52. At this time, the direction of the total force received by the magnetic attraction part 52 from the first magnetic part 51 and the second magnetic part 53 may be along the second direction. That is, the direction of the force of the adjustment system 50 on the vibration system 20 may be along the second direction. The direction of the force of the adjustment system 50 on the vibration system 20 is opposite to the direction of the elastic restoring force of the vibration system 20 itself.

[0101] Fig.18 yes Fig.14 The diagram shown is a simulation curve diagram of the displacement of the voice coil 22 of the loudspeaker 100 and the force exerted by the adjustment system 50 on the vibration system 20 . Fig.19 yes Fig.14 The diagram shows a comparison between a simulation curve of the displacement of the voice coil 22 of the loudspeaker 100 and the total stiffness coefficient of the vibration system 20 and a simulation curve of the displacement of the voice coil of a general loudspeaker and the total stiffness coefficient of the vibration system. Fig. 20 yes Fig.14 The frequency response curve simulation diagram of the loudspeaker 100 and a general loudspeaker is shown. It should be noted that: Fig. 20 Curve 1 in FIG. 1 is a frequency response curve of the loudspeaker 100 in this embodiment. Curve 2 is a frequency response curve of a general loudspeaker.

[0102] like Figures 18 to 20 As shown, as the absolute value of the displacement of the voice coil 22 after the current is input, the absolute value of the total force from the first magnetic part 51 and the second magnetic part 53 to the magnetic attraction part 52 of the adjustment system 50 also increases, so that the absolute value of the force of the adjustment system 50 on the vibration system 20 also increases. The displacement of the voice coil 22 and the force of the adjustment system 50 on the vibration system 20 can be approximately linearly related. The force of the adjustment system 50 on the vibration system 20 can be equivalent to an elastic component, and the stiffness coefficient of the elastic component can be Km. The direction of the elastic force of the elastic component (that is, the force of the adjustment system 50 on the vibration system 20 in this embodiment) is opposite to the direction of the elastic restoring force of the vibration system 20.

[0103] It is understandable that the resonant frequency F0 of a general loudspeaker can be:

[0104]

[0105] Wherein, Ks is the equivalent stiffness coefficient of the elastic restoring force of the vibration system in the loudspeaker. It can be seen from the above expression that the elastic restoring force of the vibration system will suppress the vibration of the diaphragm, resulting in a higher resonance frequency of the loudspeaker and poor low-frequency performance of the loudspeaker. By reducing the thickness of the folding ring structure of the diaphragm or selecting a material with a lower Young's modulus to prepare the folding ring structure of the diaphragm, the equivalent stiffness coefficient of the elastic restoring force can be reduced, thereby reducing the elastic restoring force of the vibration system itself. However, the low equivalent stiffness coefficient of the vibration system will cause the voice coil to easily deflect or tilt during movement, that is, polarization will occur, making the voice coil easily collide with the magnetic circuit system during movement, affecting the normal operation of the loudspeaker.

[0106] The speaker 100 in this embodiment includes an adjustment system 50, a magnetic attraction portion 52 of the adjustment system 50 is fixed to the diaphragm 21, and a first magnetic portion 51 and a second magnetic portion 53 of the adjustment system 50 are respectively fixed on opposite sides of the diaphragm 21. At least one of the first magnetic portion 51, the magnetic attraction portion 52 and the second magnetic portion 53 of the adjustment system 50 is a permanent magnet. In the thickness direction of the diaphragm 21, the distance from the magnetic attraction portion 52 to the first magnetic portion 51 can be equal to the distance from the magnetic attraction portion 52 to the second magnetic portion 53. The magnetic attraction portion 52 can be simultaneously subjected to a first attraction force from the first magnetic portion 51 and a second attraction force from the second magnetic portion 53. The direction of the first attraction force is opposite to the direction of the second attraction force. As the absolute value of the displacement of the voice coil 22 relative to its equilibrium position increases, the absolute value of the total force from the first magnetic portion 51 and the second magnetic portion 53 to the magnetic attraction portion 52 also increases, and the absolute value of the force of the magnetic attraction portion 52 on the vibration system 20 also increases. The direction of the force exerted by the magnetic attraction part 52 on the vibration system 20 is opposite to the direction of the elastic restoring force of the vibration system 20 itself. In this way, the force exerted by the adjustment system 50 on the vibration system 20 (that is, the total force exerted by the magnetic attraction part 52 of the adjustment system 50 from the first magnetic part 51 and the second magnetic part 53 in this embodiment) can be equivalent to an elastic component, and the stiffness coefficient of the elastic component can be Km. At this time, the resonant frequency F0 of the speaker 100 can be:

[0107]

[0108] It can be seen from the above expression that the force exerted by the adjustment system 50 on the vibration system 20 in the present embodiment can offset at least part of the elastic restoring force of the vibration system 20 itself in the speaker 100, thereby effectively reducing the influence of the elastic restoring force of the vibration system 20 itself on the vibration of the diaphragm 21. In this way, under the condition that the thickness and material of the diaphragm 21 are exactly the same, the resonance frequency of the speaker 100 in the present embodiment is smaller, and the low-frequency performance of the speaker 100 is better. In other words, the speaker 100 in the present embodiment can meet the stiffness requirements of the vibration system 20 itself while having better low-frequency performance, and the swing of the voice coil 22 is smaller when it moves.

[0109] Secondly, in this embodiment, the intermediate magnetic circuit 31 of the magnetic circuit system 30 has an avoidance hole 313 spaced apart from the magnetic gap 33 of the magnetic circuit system 30, and the second magnetic part 53 of the adjustment system 50 is located in the avoidance hole 313. At the same time, the first part 211a of the diaphragm 21 is arranged close to the avoidance hole 313 relative to the second part 211b, and the third part 211c of the diaphragm 21 is connected between the first part 211a and the second part 211b, and surrounds the sinking space 213 with the first part 211a. The projection of the first part 211a on the intermediate magnetic circuit 31 can be located in the avoidance hole 313. The magnetic attraction part 52 of the adjustment system 50 can be fixedly connected to the first part 211a of the diaphragm 21. In this way, by setting the avoidance hole 313 on the magnetic attraction part 52 and cooperating with the sinking space 213 formed on the diaphragm 21, the adjustment system 50 can be arranged using the thickness space of the magnetic circuit system 30, thereby reducing the overall thickness of the speaker 100. In other words, the speaker 100 in this embodiment can achieve a thin configuration while having good low-frequency performance.

[0110] In addition, the speaker 100 in this embodiment further includes a first magnetic conductive sheet 60. The first magnetic conductive sheet 60 can be fixedly connected to the surface of the magnetic circuit system 30 facing away from the diaphragm 21. The second magnetic part 53 of the adjustment system 50 can be fixedly connected to the first magnetic conductive sheet 60. In this way, under the condition that the size of the second magnetic part 53 is the same, the present embodiment can increase the magnetic induction intensity between the second magnetic part 53 and the magnetic attraction part 52 by setting the first magnetic conductive sheet 60, thereby increasing the force between the second magnetic part 53 and the magnetic attraction part 52, so as to increase the force of the adjustment system 50 on the vibration system 20, thereby better offsetting the elastic restoring force of the vibration system 20 during the movement, which is beneficial to improving the low-frequency performance of the speaker 100. Under the condition that the force between the second magnetic part 53 and the magnetic attraction part 52 is the same, the present embodiment increases the magnetic induction intensity between the second magnetic part 53 and the magnetic attraction part 52 by setting the first magnetic conductive sheet 60, thereby effectively reducing the thickness of the second magnetic part 53 itself, which is beneficial to achieving a thin setting of the speaker 100.

[0111] In addition, the rear cavity 13b of the loudspeaker 100 in this embodiment may also be a closed space. In this case, the resonant frequency F0 of the loudspeaker 100 may be:

[0112]

[0113] Wherein, Kb is the equivalent stiffness coefficient of the air in the rear cavity 13b of the loudspeaker 100 and satisfies:

[0114]

[0115] Wherein, ρ is the air density, C is the air sound velocity, Sd is the vibration area of ​​the loudspeaker 100, and V is the volume of the rear cavity 13b. It can be seen from the above expression that the air in the rear cavity 13b can be equivalent to an elastic component. The air in the rear cavity 13b can generate an equivalent elastic force, and the direction of the elastic force is the same as the direction of the elastic restoring force of the vibration system 20 itself. The loudspeaker 100 in this embodiment is provided with an adjustment system 50, and the adjustment system 50 has a force on the vibration system 20, and the direction of the force is opposite to the direction of the force of the vibration system 20 itself, so as to offset at least part of the equivalent elastic force of the air in the rear cavity 13b of the loudspeaker 100, so as to reduce the influence of the equivalent elastic force of the air in the rear cavity 13b on the movement of the diaphragm 21. In this way, under the condition that the size of the loudspeaker 100 is the same and the volume of the rear cavity 13b of the loudspeaker 100 is the same, the resonant frequency F0 of the loudspeaker 100 in this embodiment can be smaller, and the low-frequency performance of the loudspeaker 100 is better. Under the condition of the same resonant frequency F0, the volume of the rear cavity 13b of the speaker 100 in this embodiment can be smaller, which is conducive to the miniaturization of the speaker 100. In other words, the speaker 100 in this embodiment can meet the miniaturization requirements while having good low-frequency performance.

[0116] In some embodiments, the magnetic attraction portion 52 may also be fixed to the surface of the first portion 211a of the diaphragm 21 facing away from the first magnetic portion 51. In this way, under the condition that the distance between the magnetic attraction portion 52 and the first magnetic portion 51 is the same, compared with the case where the magnetic attraction portion 52 is fixed to the surface of the first portion 211a of the diaphragm 21 facing the first magnetic portion 51, the first portion 211a is sunken relative to the second portion 211b to a greater extent, that is, the size of the sunken space 213 enclosed by the first portion 211a and the third portion 211c of the diaphragm 21 is larger, the stretching amount of the diaphragm 21 during preparation is larger, and the preparation difficulty is greater. In this embodiment, the magnetic attraction portion 52 is fixed to the surface of the first portion 211a of the diaphragm 21 facing away from the first magnetic portion 51, so that the first portion 211a is smaller in size relative to the second portion 211b, that is, the size of the sinking space 213 surrounded by the first portion 211a and the third portion 211c of the diaphragm 21 is smaller, which is beneficial to reducing the stretching amount of the diaphragm 21, reducing the difficulty of manufacturing the diaphragm 21, and improving production efficiency and product yield. At the same time, when the rear cavity 13b of the speaker 100 is a closed space, the magnetic attraction portion 52 is fixed to the surface of the first portion 211a of the diaphragm 21 facing away from the first magnetic portion 51, so that the magnetic attraction portion 52 can also be located in the rear cavity 13b of the speaker 100, which is beneficial to improving the waterproof ability of the magnetic attraction portion 52 and extending the service life of the speaker 100.

[0117] In some embodiments, the distance between the diaphragm 21 and the magnetic circuit system 30 may be greater than 0.12 mm. In this way, there is a certain distance between the diaphragm 21 and the magnetic circuit system 30, so that the diaphragm 21 can avoid rubbing against the magnetic circuit system 30 during the vibration process, avoid generating noise, and affect the acoustic performance of the speaker 100.

[0118] In some embodiments, the projection of the magnetic attraction portion 52 of the adjustment system 50 on the plane where the diaphragm 21 is located can be symmetrically arranged about the center of the diaphragm 21. In this way, the force exerted by the magnetic attraction portion 52 on the diaphragm 21 can act on the center of the diaphragm 21, thereby ensuring the torque balance of the vibration system 20 and preventing the force exerted by the magnetic attraction portion 52 on the diaphragm 21 from deviating from the center of the diaphragm 21, causing the diaphragm 21 to deflect during the vibration process, thereby affecting the normal operation of the speaker 100.

[0119] In some embodiments, the first magnetic portion 51 and the second magnetic portion 53 may be symmetrically arranged with respect to the magnetic attraction portion 52. In this way, the force between the first magnetic portion 51 and the magnetic attraction portion 52 and the force between the second magnetic portion 53 and the magnetic attraction portion 52 may be on the same straight line, thereby preventing the magnetic attraction portion 52 from being deflected by two forces on different straight lines, thereby affecting the normal movement of the diaphragm.

[0120] In some embodiments, Fig.21aAs shown, the first magnetic part 51 can also adopt the magnetic circuit setting of the Halbach array. The polarization direction of the first middle magnet 511 can be parallel to the thickness direction of the diaphragm 21. The polarization directions of the two first side magnets 512 can be perpendicular to the polarization direction of the first middle magnet 511. Among them, the polarity of the part of the first middle magnet 511 facing the magnetic attraction part 52 can be an S pole. The polarity of the part of the first side magnet 512 facing the first middle magnet 511 can be an S pole. In this way, by setting the magnetic circuit of the first magnetic part 51 and / or the second magnetic part 53 as a Halbach array, the magnetic energy of the first magnetic part 51 can be effectively enhanced. Under the condition that the magnetic energy of the first magnetic part 51 is the same, the thickness of the first magnetic part 51 can be thinned, which is conducive to realizing the thinning setting of the speaker 100. In other embodiments, the second magnetic part 53 can also adopt the magnetic circuit setting of the Halbach array.

[0121] In some embodiments, Figure 21b As shown, the second magnetic conductive sheet 70 may also include a main body 71 and an annular portion 72. The annular portion 72 may be fixedly connected to the outer periphery of the main body 71. At this time, the second magnetic conductive sheet 70 may be roughly bowl-shaped. The main body 71 may be located on the side of the first magnetic portion 51 that is away from the magnetic attraction portion 52, and may be fixedly connected to the first magnetic portion 51 and the shell 10. The annular portion 72 may be arranged around the first magnetic portion 51. In this way, the second magnetic conductive sheet 70 may semi-surround the first magnetic portion 51, thereby better enhancing the magnetic induction intensity between the first magnetic portion 51 and the magnetic attraction portion 52. Under the condition that the magnetic induction intensity between the first magnetic portion 51 and the magnetic attraction portion 52 is the same, the thickness of the first magnetic portion 51 in this embodiment may be thinner, which is conducive to achieving a thin setting of the speaker 100.

[0122] The structure of the loudspeaker 100 is introduced in detail above. Hereinafter, several different implementation modes of the adjustment system 50 will be introduced in detail with reference to the relevant drawings.

[0123] Fig. 22 yes Fig.15a The structure shown is a simplified schematic diagram of another embodiment.

[0124] like Fig. 22 As shown, the structure of the speaker 100 in this embodiment is similar to Fig.15aThe structures shown are roughly the same, and the same parts will not be repeated. The differences between the two will be introduced below. In this embodiment, the first magnetic part 51 and the second magnetic part 53 can both be permanent magnets. The magnetic attraction part 52 can be a soft magnet. Among them, the polarization direction of the first magnetic part 51 and the polarization direction of the second magnetic part 53 can be parallel to the thickness direction of the diaphragm 21. The polarity of the first end of the first magnetic part 51 and the polarity of the second end of the second magnetic part 53 can be opposite. That is, the polarization direction of the first magnetic part 51 and the polarization direction of the second magnetic part 53 can be the same. The part of the first magnetic part 51 facing the second magnetic part 53 can be attracted to the part of the second magnetic part 53 facing the first magnetic part 51. At this time, an attractive force can be generated between the first magnetic part 51 and the second magnetic part 53.

[0125] It can be understood that the first magnetic part 51 and the second magnetic part 53 of the speaker 100 in this embodiment can both be permanent magnets. The polarization direction of the first magnetic part 51 and the polarization direction of the second magnetic part 53 can be the same, and both are parallel to the thickness direction of the diaphragm 21. That is, the part of the first magnetic part 51 facing the second magnetic part 53 can be attracted to the part of the second magnetic part 53 facing the first magnetic part 51. In this way, the force between the first magnetic part 51 and the second magnetic part 53 is an attractive force. Compared with the speaker in which the force between the first magnetic part and the second magnetic part is a repulsive force, during its assembly process, due to the repulsive force generated between the first magnetic part and the second magnetic part, when the first magnetic part is installed after the second magnetic part is installed, the first magnetic part is fixed in the direction toward the second magnetic part. The repulsive force is received from the second magnetic part, and the direction of the repulsive force is opposite to the installation direction of the first magnetic part, thereby causing the first magnetic part to produce an assembly tolerance. In the present embodiment, the acting force between the first magnetic part 51 and the second magnetic part 53 is an attractive force. When the first magnetic part 51 is fixed in the direction toward the second magnetic part 53, the direction of the attractive force between the first magnetic part 51 and the second magnetic part 53 is the same as the installation direction of the first magnetic part 51, thereby effectively avoiding the problem of assembly tolerance caused by the repulsive force from the second magnetic part 53 during the assembly process of the first magnetic part 51, which is beneficial to improving the product yield of the speaker 100.

[0126] In some embodiments, Fig.23As shown, the first magnetic part 51, the second magnetic part 53 and the magnetic attraction part 52 can all be permanent magnets. The first magnetic part 51, the second magnetic part 53 and the magnetic attraction part 52 can all include a magnet. The polarization directions of the first magnetic part 51, the second magnetic part 53 and the magnetic attraction part 52 can be the same, and are all parallel to the thickness direction of the diaphragm 21. In this way, the magnetic induction intensity between the magnetic attraction part 52 and the first magnetic part 51 is relatively large, and the magnetic induction intensity between the magnetic attraction part 52 and the second magnetic part 53 is also relatively large. Under the condition that the magnetic induction intensity between the magnetic attraction part 52 and the first magnetic part 51 is the same, and the magnetic induction intensity between the magnetic attraction part 52 and the second magnetic part 53 is also the same, the thickness of the first magnetic part 51 and the second magnetic part 53 can be reduced, which is conducive to realizing a thin setting of the speaker 100. In other embodiments, such as Fig.24 As shown, the first magnetic part 51 and the second magnetic part 53 can also be soft magnets. The magnetic attraction part 52 can also be a permanent magnet.

[0127] In some embodiments, the speaker 100 may further include a first gasket (not shown) and a second gasket (not shown). Both the first gasket and the second gasket may be made of non-magnetic materials such as foam. Among them, the first gasket may be fixed to the surface of the first magnetic portion 51 facing the magnetic attraction portion 52. The second gasket may be fixed to the surface of the second magnetic portion 53 facing the magnetic attraction portion 52. It is understood that by arranging the first gasket between the first magnetic portion 51 and the magnetic attraction portion 52, and arranging the second gasket between the second magnetic portion 53 and the magnetic attraction portion 52, it is possible to effectively avoid the problem that when the magnetic attraction portion 52 moves to a position closer to the first magnetic portion 51 or the second magnetic portion 53, the attraction between the two is too large, causing the magnetic attraction portion 52 to be adsorbed on the first magnetic portion 51 or the second magnetic portion 53, thereby affecting the normal operation of the speaker 100. In some other embodiments, the first gasket may also be fixed to the surface of the magnetic attraction portion 52 facing the first magnetic portion 51. The second gasket may also be fixed to the surface of the magnetic attraction portion 52 facing the second magnetic portion 53.

[0128] Fig.25 yes Fig.15a The structure shown is a simplified schematic diagram of yet another embodiment.

[0129] like Fig.25 As shown, the structure of the speaker 100 in this embodiment is similar to Fig.15aThe structures shown are roughly the same, and the same parts will not be repeated. The differences between the two will be described below. In this embodiment, the two first side magnets 512 of the first magnetic part 51 can be respectively located on the opposite sides of the first middle magnet 511, and are spaced apart from the first middle magnet 511. At this time, the first middle magnet 511 can form a first gap 513 with the first side magnet 512. The second magnetic part 53 can be mirror-symmetrical with the first magnetic part 51 relative to the plane where the middle magnet 311 is located. At this time, the second magnetic part 53 can have a second gap 533. The projection of the first gap 513 in the thickness direction of the diaphragm 21 can cover the second gap 533. The magnetic attraction part 52 can be provided with at least one through hole 521. The projection of the first gap 513 on the magnetic attraction part 52 along the thickness direction of the diaphragm 21 can be spaced apart from the through hole 521. The projection of the second gap 533 on the magnetic attraction part 52 along the thickness direction of the diaphragm 21 can be spaced apart from the through hole 521.

[0130] It can be understood that in the present embodiment, there is a first gap 513 between the first middle magnet 511 and the first side magnet 512 of the first magnetic part 51. The magnetic induction intensity of the first magnetic part 51 near the first gap 513 is relatively strong. The magnetic attraction part 52 has at least one through hole 521, and the projection of the first gap 513 of the first magnetic part 51 on the magnetic attraction part 52 along the thickness direction of the diaphragm 21 can be spaced apart from the through hole 521. In this way, the through hole 521 of the magnetic attraction part 52 can avoid the area with relatively strong magnetic induction intensity of the first magnetic part 51, that is, the magnetic attraction part 52 itself can be located in the area with relatively strong magnetic induction intensity of the first magnetic part 51, so that the mass of the magnetic attraction part 52 can be reduced while ensuring the force between the first magnetic part 51 and the magnetic attraction part 52, so as to reduce the influence of the magnetic attraction part 52 on the vibration of the diaphragm 21. In addition, the overall mass of the speaker 100 is relatively light, which is conducive to realizing the lightweight setting of the speaker 100.

[0131] In other embodiments, the magnetic attraction portion 52 may further include a plurality of small magnets disposed at intervals. The small magnets may be soft magnets or permanent magnets. The gap between two adjacent small magnets may constitute at least a portion of the through hole 521 of the magnetic attraction portion 52.

[0132] It should be noted that, in the absence of conflict, the features in the embodiments of the present application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of the present application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0133] It should be noted that all the above drawings are illustrative illustrations of the present application and do not represent the actual size of the product. Moreover, the size ratio relationship between the components in the drawings is not intended to limit the actual product of the present application.

[0134] The above are only some implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A loudspeaker (100), characterized in that: The invention comprises a shell (10), a magnetic circuit system (30), a vibration system (20), and an adjustment system (50); the magnetic circuit system (30) is fixed to the shell (10); the magnetic circuit system (30) comprises an intermediate magnetic circuit (31) and a side magnetic circuit (32); the intermediate magnetic circuit (31) and the side magnetic circuit (32) are arranged at intervals; a magnetic gap (33) is formed between the intermediate magnetic circuit (31) and the side magnetic circuit (32); the intermediate magnetic circuit (31) is provided with an avoidance hole (313); and the avoidance hole (313) and the magnetic gap (33) are arranged at intervals; The vibration system (20) comprises a diaphragm (21) and a voice coil (22); the diaphragm (21) is fixed to the housing (10) and spaced apart from the magnetic circuit system (30); the voice coil (22) is fixedly connected to the diaphragm (21); at least a portion of the voice coil (22) is located in the magnetic gap (33); the diaphragm (21) comprises a first portion (211a), a second portion (211b), and a third portion (211c); the third portion (211c) is connected between the first portion (211a) and the second portion (211b); The adjustment system (50) comprises a first magnetic part (51), a magnetic attraction part (52) and a second magnetic part (53); the first magnetic part (51) and the second magnetic part (53) are respectively located on two opposite sides of the diaphragm (21) and are fixed relative to the housing (10); the second magnetic part (53) is located in the avoidance hole (313); and the magnetic attraction part (52) is fixedly connected to the first part (211a); In the thickness direction of the diaphragm (21), the distance from the magnetic attraction portion (52) to the first magnetic portion (51) is equal to the distance from the magnetic attraction portion (52) to the second magnetic portion (53); the distance from the first portion (211a) to the second magnetic portion (53) is smaller than the distance from the second portion (211b) to the second magnetic portion (53); the first portion (211a) and the third portion (211c) enclose a sinking space (213); and the projection of the first portion (211a) on the intermediate magnetic circuit (31) is located within the avoidance hole (313); At least one of the first magnetic part (51), the magnetic attraction part (52) and the second magnetic part (53) is a permanent magnet; the first magnetic part (51) generates an attractive force with the magnetic attraction part (52); and the second magnetic part (53) generates an attractive force with the magnetic attraction part (52).

2. The loudspeaker (100) according to claim 1, characterized in that The distance between the first part (211a) and the second magnetic part (53) is greater than 0.12 mm, and the distance between the third part (211a) and the magnetic circuit system (30) is greater than 0.12 mm.

3. The loudspeaker (100) according to claim 1 or 2, characterized in that: The loudspeaker (100) further comprises a first magnetic conductive sheet (60), wherein the first magnetic conductive sheet (60) is fixedly connected to a surface of the magnetic circuit system (30) facing away from the diaphragm (21) and the housing (10), the avoidance hole (313) exposes at least a portion of the first magnetic conductive sheet (60), and the second magnetic portion (53) is fixedly connected to the first magnetic conductive sheet (60).

4. The loudspeaker (100) according to any one of claims 1 to 3, characterized in that: The loudspeaker (100) further comprises a second magnetic conductive sheet (70), at least a portion of which is located on a side of the first magnetic portion (51) facing away from the magnetic attraction portion (52), and is fixedly connected to the first magnetic portion (51) and the housing (10).

5. The loudspeaker (100) according to claim 4, characterized in that: The second magnetic conductive sheet (70) comprises a main body (71) and an annular portion (72), wherein the annular portion (72) is connected to the outer periphery of the main body (71), the main body (71) is located on the side of the first magnetic portion (51) facing away from the magnetic attraction portion (52), and is fixedly connected to the first magnetic portion (51) and the shell (10), and the annular portion (72) is arranged around the first magnetic portion (51).

6. The loudspeaker (100) according to any one of claims 1 to 5, characterized in that: The magnetic attraction portion (52) is fixedly connected to the surface of the first portion (211a) facing the avoidance hole (313).

7. The loudspeaker (100) according to any one of claims 1 to 6, characterized in that: The first magnetic part (51) and the second magnetic part (53) are both permanent magnets, and the part of the first magnetic part (51) facing the second magnetic part (53) and the part of the second magnetic part (53) facing the first magnetic part (51) are attracted to each other.

8. The loudspeaker (100) according to claim 7, characterized in that: The magnetic attraction portion (52) is a soft magnet; Alternatively, the magnetic attraction portion (52) is a permanent magnet, and a portion of the magnetic attraction portion (52) facing the first magnetic portion (51) attracts a portion of the first magnetic portion (51) facing the magnetic attraction portion (52).

9. The loudspeaker (100) according to claim 7 or 8, characterized in that: The loudspeaker (100) further comprises a first gasket, which is located between the first magnetic portion (51) and the magnetic attraction portion (52) and is fixedly connected to the first magnetic portion (51) or the magnetic attraction portion (52).

10. The loudspeaker (100) according to any one of claims 7 to 9, characterized in that: The first magnetic part (51) comprises a first middle magnet (511) and a first side magnet (512), and a first gap (513) is formed between the first middle magnet (511) and the first side magnet (512); The magnetic attraction portion (52) is provided with at least one through hole (521), and a projection of the first gap (513) on the magnetic attraction portion (52) along the thickness direction of the diaphragm (21) is arranged at a distance from the through hole (521).

11. The loudspeaker (100) according to any one of claims 1 to 10, characterized in that: The projection of the magnetic attraction portion (52) on the plane where the diaphragm (21) is located is arranged symmetrically with respect to the center of the diaphragm (21).

12. The loudspeaker (100) according to any one of claims 1 to 11, characterized in that: The first magnetic portion (51) and the second magnetic portion (53) are symmetrically arranged with respect to the magnetic attraction portion (52).

13. The loudspeaker (100) according to any one of claims 1 to 12, characterized in that: When no current is input to the voice coil (22), the force exerted by the regulating system (50) on the vibration system (20) is 0; when current is input to the voice coil (22), the direction of the force exerted by the regulating system (50) on the vibration system (20) is opposite to the direction of the elastic restoring force of the vibration system (20) itself.

14. An electronic device (1000), characterized in that: The invention comprises a device housing (200) and a loudspeaker (100) according to any one of claims 1 to 13, wherein the loudspeaker (100) is arranged in the device housing (200).

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