Loudspeaker module and electronic equipment

Abstract

The utility model relates to the technical field of audio, in particular to a loudspeaker module and electronic equipment. The loudspeaker module comprises a shell, a sound production unit, a driven part and a magnetic assembly. The sound production unit is installed on the housing and forms a rear sound cavity with the housing. The driven piece divides the rear sound cavity into a first cavity and a second cavity which are not communicated with each other; at least part of the structure of the driven piece can deform in the first direction; the first magnetic attraction part and the second magnetic attraction part are fixed to the shell and arranged at intervals in the first direction, the third magnetic attraction part is fixed to the driven part and located between the first magnetic attraction part and the second magnetic attraction part, and magnetic attraction force exists between the third magnetic attraction part and the first magnetic attraction part and between the third magnetic attraction part and the second magnetic attraction part. According to the embodiment of the invention, the follower and the magnetic assembly are arranged, so that the compliance value of the rear sound cavity of the loudspeaker module is increased, and the low-frequency performance of the loudspeaker module is improved. Moreover, the driven member and the magnetic assembly are simple and reasonable in structure, thereby facilitating the miniaturization design of the loudspeaker module.

Description

Technical Field

[0001] The present application relates to the field of audio technology, and in particular to a speaker module and an electronic device. Background Art

[0002] In a speaker, the low-frequency performance of the speaker is affected by the volume of its rear sound cavity. In electronic devices such as mobile phones, when the volume of the electronic device needs to be miniaturized, the volume of the speaker also needs to be miniaturized, which makes the volume of the rear sound cavity of the speaker smaller and the low-frequency performance of the speaker worse. Utility Model Content

[0003] In the first aspect, the purpose of the embodiments of the present application is to provide a speaker module and an electronic device, wherein the speaker module includes a housing, a sound unit, a follower, and a magnetic assembly. The sound unit is mounted on the housing and forms a rear sound cavity with the housing; the follower is fixed to the inner side of the housing and divides the rear sound cavity into a first cavity and a second cavity that are not connected to each other; at least part of the structure of the follower can be deformed along a first direction; the magnetic assembly is located in the first cavity or the second cavity, and the magnetic assembly includes a first magnetic member, a second magnetic member, and a third magnetic member, the first magnetic member and the second magnetic member are fixed to the housing and arranged at intervals along the first direction, the third magnetic member is fixed to the follower, the third magnetic member is located between the first magnetic member and the second magnetic member, and there is magnetic attraction between the third magnetic member and the first magnetic member, and between the third magnetic member and the second magnetic member.

[0004] Since the first magnetic member and the second magnetic member are arranged along the first direction, and the third magnetic member is located between the first magnetic member and the second magnetic member, the magnetic attraction force on the third magnetic member can be parallel to the first direction; in addition, since the follower can be deformed along the first direction, when the follower deviates from the equilibrium position, the magnetic attraction force on the third magnetic member gradually increases, and the greater the displacement of the third magnetic member, the greater the magnetic attraction force. The third magnetic member applies force to the follower, causing the follower to deform in the first direction away from the initial position. At this time, the force direction of the follower is the same as the deformation direction. In the speaker module, since the first cavity and the second cavity are on both sides of the follower, the follower will push the gas in the first cavity or the second cavity to move in the same direction, that is, the air in the first cavity and the second cavity can be pushed a larger distance with a smaller force, and the whole is softer and has a larger compliance value, which increases the compliance value of the rear sound cavity of the speaker module.

[0005] When the sound unit makes a sound, the sound unit will vibrate the air. Taking the sound unit compressing the air in the first cavity as an example, after the air in the first cavity is compressed, the air in the first cavity will squeeze the follower. The follower is deformed after being squeezed, and actively compresses the air in the second cavity, and synchronously pulls the air in the first cavity (equivalent to reducing the degree of compression of the air in the first cavity). The follower is equivalent to making the air in the first cavity and the second cavity easier to be compressed, and the reaction force of the air in the first cavity and the second cavity on the sound unit is also smaller. The air in the first cavity and the second cavity will have less influence on the sound unit, so that the low-frequency performance of the speaker module is better.

[0006] It can be understood that since the first cavity and the second cavity are not connected, when the follower is not subjected to force, the combined force of the air pressure in the first cavity and the second cavity, the force between the magnetic components and the deformation recovery force of the follower will drive the follower to return to its initial equilibrium position.

[0007] In this embodiment, by providing a follower and a magnetic assembly, the follower in the speaker module has a tendency to deviate from the initial position when driven by force, thereby increasing the compliance value of the rear sound cavity of the speaker module and improving the low-frequency performance of the speaker module. In addition, the structures of the follower and the magnetic assembly are relatively simple and reasonable, and the volume of the speaker module is basically not increased, which is conducive to the miniaturization design of the speaker module.

[0008] In some embodiments, the first magnetic attraction member and the second magnetic attraction member are magnetic members, and the third magnetic attraction member is a magnetic conductive member.

[0009] In this embodiment, since the third magnetic component is a magnetic conductive component, the third magnetic component can easily generate magnetic attraction with the first magnetic component and the second magnetic component, making the structure of the magnetic component simpler and facilitating the arrangement of the first magnetic component and the second magnetic component.

[0010] In some embodiments, the third magnetic attraction member is a magnetic member, and the first magnetic attraction member and the second magnetic attraction member are magnetic conductive members.

[0011] In this embodiment, since the first magnetic member and the second magnetic member are both magnetic conductive members, the first magnetic member and the second magnetic member can easily generate magnetic attraction with the third magnetic member, making the structure of the magnetic component simpler and facilitating the setting of the third magnetic member.

[0012] In some embodiments, the first magnetic member, the second magnetic member and the third magnetic member are all magnetic members. In the first direction, the magnetism of the magnetic poles of the first magnetic member and the third magnetic member that are close to each other is opposite, and the magnetism of the magnetic poles of the second magnetic member and the third magnetic member that are close to each other is opposite.

[0013] In this embodiment, since the first magnetic attraction component, the second magnetic attraction component and the third magnetic attraction component are all magnetic components, it is easy to make the magnetic attraction force between different magnetic components larger, and the arrangement of the magnetic poles can be set to adjust the change trend of the magnetic attraction force, thereby adjusting the compliance of the follower.

[0014] In some embodiments, in the first direction, the projections of the third magnetic element do not overlap with the projections of the first magnetic element and the second magnetic element.

[0015] In this embodiment, when the speaker module is impacted, or when the third magnetic component moves a large distance in the first direction during operation of the speaker module, the third magnetic component can be prevented from colliding with the first magnetic component and the second magnetic component, thereby preventing the follower from being unable to move, preventing the follower from failing, and improving the reliability of the speaker module.

[0016] In some embodiments, the housing has a fixed portion, the fixed portion surrounds the follower, and the edge of the follower is sealed and fixed to the fixed portion; the follower is an integrated structural member, the follower is a flexible member or an elastic member, and the stiffness of the follower is less than the stiffness of the fixed portion.

[0017] In this embodiment, the follower has a relatively simple structure and is easy to manufacture and install.

[0018] In some embodiments, the follower includes a follower portion and a deformation portion, the deformation portion surrounds the follower portion, the deformation portion connects the follower portion and the housing, the rigidity of the deformation portion is smaller than the rigidity of the follower portion, and the deformation portion can be deformed.

[0019] In this embodiment, the force on the follower is more uniform and the deformation is also more uniform; and because the rigidity of the follower is large, the area of ​​the follower can be set larger, so that the follower has a larger force-bearing area, which is also beneficial to improving the compliance of the follower, thereby improving the compliance of the speaker module.

[0020] In some embodiments, the magnetic assembly includes multiple groups, and the multiple groups of magnetic assemblies are arranged along the circumference of the driven member.

[0021] In this embodiment, multiple groups of magnetic components can make the follower receive force from multiple force points, so that the force on the follower is more balanced, and multiple groups of magnetic components can form a centering effect on the follower, so that the follower moves mainly along the first direction, making the follower more reliable.

[0022] In some embodiments, the sound generating unit has a diaphragm, and the first direction is parallel to the vibration direction of the diaphragm.

[0023] In this embodiment, since the length and width of the follower occupy a larger space, and in the direction perpendicular to the first direction, the follower reuses the space occupied by the length and width of the diaphragm, the length and width dimensions of the speaker module are hardly increased; and since the thickness of the diaphragm is relatively small, in the first direction, the arrangement of the follower has little effect on the thickness dimension of the speaker module; therefore, the arrangement direction of the follower is conducive to the miniaturization and thinning of the speaker module.

[0024] In some embodiments, when the follower deforms and moves away from the initial position, the force of the magnetic assembly on the follower is greater than the deformation restoring force of the follower 3 .

[0025] In this embodiment, when the sound-emitting unit vibrates the air in the first cavity, the air in the first cavity has an initial driving force on the follower, and the follower will deviate from the equilibrium position. Then the magnetic force on the follower increases, and the magnetic force is greater than the deformation force of the follower. The magnetic force of the magnetic assembly will eliminate the influence of the deformation of the follower itself on the compliance of the speaker module, which is conducive to further increasing the compliance of the speaker module.

[0026] In the second aspect, an embodiment of the present application provides a speaker module, including a shell, a sound unit, a follower and a magnetic assembly; the sound unit is installed on the shell and forms a rear sound cavity with the shell; the follower is fixed to the inner side of the shell and divides the rear sound cavity into a first cavity and a second cavity that are not connected to each other, and at least part of the structure of the follower can be deformed along a first direction; the magnetic assembly is located in the first cavity or the second cavity, and the magnetic assembly includes a first magnetic part and a second magnetic part, the first magnetic part is fixed to the inner side of the shell, and the second magnetic part is fixed to the follower, the first magnetic part and the second magnetic part are arranged along the second direction, the magnetism of the relative poles of the first magnetic part and the second magnetic part is the same, and the second direction is perpendicular to the first direction.

[0027] In the initial position, the component of the magnetic repulsion between the first magnetic part and the second magnetic part in the first direction of the follower is 0, and the air pressure in the first cavity and the second cavity is equal. At this time, the follower will not move and is in a balanced state. When the speaker module starts to vibrate, such as vibrating to the right, the air pressure in the first cavity rises and is greater than the air pressure in the second cavity. The pressure difference pushes the follower to deviate from the initial position and move to the right. At this time, the second magnetic part deviates from the initial position and moves to the right. The magnetic repulsion between the first magnetic part and the second magnetic part generates a force component in the direction of movement of the follower (that is, the first direction), thereby pushing the follower to move to the right. The magnetic force of the first magnetic part and the second magnetic part is equivalent to an elastic force, which drives the follower to move in a direction away from the initial position. The greater the displacement, the greater the elastic force.

[0028] In this embodiment, by providing a follower and a magnetic assembly, the follower in the speaker module has a tendency to deviate from the initial position when driven by force, thereby increasing the compliance value of the rear sound cavity of the speaker module and improving the low-frequency performance of the speaker module. In addition, the structures of the follower and the magnetic assembly are relatively simple and reasonable, and the volume of the speaker module is basically not increased, which is conducive to the miniaturization design of the speaker module.

[0029] In some embodiments, the housing has a fixed portion, the fixed portion surrounds the follower, and the edge of the follower is sealed and fixed to the fixed portion; the follower is an integrated structural member, the follower is a flexible member or an elastic member, and the stiffness of the follower is less than the stiffness of the fixed portion.

[0030] In this embodiment, the follower has a relatively simple structure and is easy to manufacture and install.

[0031] In some embodiments, the follower includes a follower portion and a deformation portion, the deformation portion surrounds the follower portion, the deformation portion connects the follower portion and the housing, the rigidity of the deformation portion is smaller than the rigidity of the follower portion, and the deformation portion can be deformed.

[0032] In this embodiment, the force on the follower is more uniform and the deformation is also more uniform; and because the rigidity of the follower is large, the area of ​​the follower can be set larger, so that the follower has a larger force-bearing area, which is also beneficial to improving the compliance of the follower, thereby improving the compliance of the speaker module.

[0033] In some embodiments, the magnetic assembly includes multiple groups, and the multiple groups of magnetic assemblies are arranged along the circumference of the driven member.

[0034] In this embodiment, multiple groups of magnetic components can make the follower receive force from multiple force points, so that the force on the follower is more balanced, and multiple groups of magnetic components can form a centering effect on the follower, so that the follower moves mainly along the first direction, making the follower more reliable.

[0035] In some embodiments, the sound generating unit has a diaphragm, and the first direction is parallel to the vibration direction of the diaphragm.

[0036] In this embodiment, since the length and width of the follower occupy a larger space, and in the direction perpendicular to the first direction, the follower reuses the space occupied by the length and width of the diaphragm, the length and width dimensions of the speaker module are hardly increased; and since the thickness of the diaphragm is relatively small, in the first direction, the arrangement of the follower has little effect on the thickness dimension of the speaker module; therefore, the arrangement direction of the follower is conducive to the miniaturization and thinning of the speaker module.

[0037] In some embodiments, when the follower deforms and moves away from the initial position, the force of the magnetic assembly on the follower is greater than the deformation restoring force of the follower 3 .

[0038] In this embodiment, when the sound-emitting unit vibrates the air in the first cavity, the air in the first cavity has an initial driving force on the follower, and the follower will deviate from the equilibrium position. Then the magnetic force on the follower increases, and the magnetic force is greater than the deformation force of the follower. The magnetic force of the magnetic assembly will eliminate the influence of the follower's own deformation on the compliance of the speaker module, which is conducive to further increasing the compliance of the speaker module.

[0039] In a third aspect, an embodiment of the present application provides an electronic device, comprising a housing and a speaker module provided by any of the above embodiments; the speaker module is installed on the inner side of the housing.

[0040] In this embodiment, the electronic device has good low-frequency performance.

[0041] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising a shell and a speaker module, the speaker module being installed on the inner side of the shell; the speaker module comprising a shell, a sound unit, a follower and a magnetic assembly, the sound unit and the follower being fixed to the shell at intervals, the follower, the sound unit and the shell forming a first cavity, and the side of the follower facing away from the first cavity forming a second cavity; the magnetic assembly is located in the first cavity or the second cavity, the magnetic assembly comprising a first magnetic member, a second magnetic member and a third magnetic member, the first magnetic member and the second magnetic member being fixed to the shell and arranged at intervals along the first direction, the third magnetic member being fixed to the follower, the third magnetic member being located between the first magnetic member and the second magnetic member, and there being magnetic attraction between the third magnetic member and the first magnetic member, and between the third magnetic member and the second magnetic member.

[0042] In this embodiment, by providing a follower and a magnetic assembly, the follower in the speaker module has a tendency to deviate from the initial position when driven by force, thereby increasing the compliance value of the rear sound cavity of the speaker module and improving the low-frequency performance of the speaker module. In addition, the structure of the follower and the magnetic assembly is relatively simple and reasonable; at the same time, the rear sound cavity of the speaker module is formed by using the housing of the electronic device, which is also conducive to reducing the volume of the speaker module and facilitating the miniaturization design of the speaker module.

[0043] In some embodiments, the first magnetic attraction member and the second magnetic attraction member are magnetic members, and the third magnetic attraction member is a magnetic conductive member.

[0044] In this embodiment, since the third magnetic component is a magnetic conductive component, the third magnetic component can easily generate magnetic attraction with the first magnetic component and the second magnetic component, making the structure of the magnetic component simpler and facilitating the arrangement of the first magnetic component and the second magnetic component.

[0045] In some embodiments, the third magnetic attraction member is a magnetic member, and the first magnetic attraction member and the second magnetic attraction member are magnetic conductive members.

[0046] In this embodiment, since the first magnetic member and the second magnetic member are both magnetic conductive members, the first magnetic member and the second magnetic member can easily generate magnetic attraction with the third magnetic member, making the structure of the magnetic component simpler and facilitating the setting of the third magnetic member.

[0047] In some embodiments, the first magnetic member, the second magnetic member and the third magnetic member are all magnetic members. In the first direction, the magnetism of the magnetic poles of the first magnetic member and the third magnetic member that are close to each other is opposite, and the magnetism of the magnetic poles of the second magnetic member and the third magnetic member that are close to each other is opposite.

[0048] In this embodiment, since the first magnetic attraction component, the second magnetic attraction component and the third magnetic attraction component are all magnetic components, it is easy to make the magnetic attraction force between different magnetic components larger, and the arrangement of the magnetic poles can be set to adjust the change trend of the magnetic attraction force, thereby adjusting the compliance of the follower.

[0049] In some embodiments, in the first direction, the projections of the third magnetic element do not overlap with the projections of the first magnetic element and the second magnetic element.

[0050] In this embodiment, when the speaker module is impacted, or when the third magnetic component moves a large distance in the first direction during operation of the speaker module, the third magnetic component can be prevented from colliding with the first magnetic component and the second magnetic component, thereby preventing the follower from being unable to move, preventing the follower from failing, and improving the reliability of the speaker module.

[0051] In some embodiments, the housing has a fixed portion, the fixed portion surrounds the follower, and the edge of the follower is sealed and fixed to the fixed portion; the follower is an integrated structural member, the follower is a flexible member or an elastic member, and the stiffness of the follower is less than the stiffness of the fixed portion.

[0052] In this embodiment, the follower has a relatively simple structure and is easy to manufacture and install.

[0053] In some embodiments, the follower includes a follower portion and a deformation portion, the deformation portion surrounds the follower portion, the deformation portion connects the follower portion and the housing, the rigidity of the deformation portion is smaller than the rigidity of the follower portion, and the deformation portion can be deformed.

[0054] In this embodiment, the force on the follower is more uniform and the deformation is also more uniform; and because the rigidity of the follower is large, the area of ​​the follower can be set larger, so that the follower has a larger force-bearing area, which is also beneficial to improving the compliance of the follower, thereby improving the compliance of the speaker module.

[0055] In some embodiments, the magnetic assembly includes multiple groups, and the multiple groups of magnetic assemblies are arranged along the circumference of the driven member.

[0056] In this embodiment, multiple groups of magnetic components can make the follower receive force from multiple force points, so that the force on the follower is more balanced, and multiple groups of magnetic components can form a centering effect on the follower, so that the follower moves mainly along the first direction, making the follower more reliable.

[0057] In some embodiments, the sound generating unit has a diaphragm, and the first direction is parallel to the vibration direction of the diaphragm.

[0058] In this embodiment, since the length and width of the follower occupy a larger space, and in the direction perpendicular to the first direction, the follower reuses the space occupied by the length and width of the diaphragm, the length and width dimensions of the speaker module are hardly increased; and since the thickness of the diaphragm is relatively small, in the first direction, the arrangement of the follower has little effect on the thickness dimension of the speaker module; therefore, the arrangement direction of the follower is conducive to the miniaturization and thinning of the speaker module.

[0059] In a fifth aspect, an electronic device comprises a shell device shell and a speaker module, wherein the speaker module is installed on the inner side of the outer shell; the speaker module comprises a shell, a sound unit, a follower and a magnetic assembly, wherein the sound unit and the follower are fixed to the shell at intervals, the shell device is provided with a sound outlet hole, and the sound emitted by the sound unit is transmitted through the sound outlet hole, the follower is fixed to the shell, the follower, the sound unit and the shell form a first cavity, and the side of the follower facing away from the first cavity forms a second cavity, and the shell and the shell device form a second cavity; the magnetic assembly is located in the first cavity or the second cavity, the magnetic assembly comprises a first magnetic member and a second magnetic member, the first magnetic member is fixed to the inner side of the shell, the second magnetic member is fixed to the follower, the first magnetic member and the second magnetic member are arranged along a second direction, the magnetic poles of the first magnetic member and the second magnetic member are arranged opposite to each other and have the same magnetism, and the second direction is perpendicular to the first direction.

[0060] In this embodiment, by providing a follower and a magnetic assembly, the follower in the speaker module has a tendency to deviate from the initial position when driven by force, thereby increasing the compliance value of the rear sound cavity of the speaker module and improving the low-frequency performance of the speaker module. In addition, the structure of the follower and the magnetic assembly is relatively simple and reasonable; at the same time, the rear sound cavity of the speaker module is formed by using the housing of the electronic device, which is also conducive to reducing the volume of the speaker module and facilitating the miniaturization design of the speaker module.

[0061] In some embodiments, the housing has a fixed portion, the fixed portion surrounds the follower, and the edge of the follower is sealed and fixed to the fixed portion; the follower is an integrated structural member, the follower is a flexible member or an elastic member, and the stiffness of the follower is less than the stiffness of the fixed portion.

[0062] In this embodiment, the follower has a relatively simple structure and is easy to manufacture and install.

[0063] In some embodiments, the follower includes a follower portion and a deformation portion, the deformation portion surrounds the follower portion, the deformation portion connects the follower portion and the housing, the rigidity of the deformation portion is smaller than the rigidity of the follower portion, and the deformation portion can be deformed.

[0064] In this embodiment, the force on the follower is more uniform and the deformation is also more uniform; and because the rigidity of the follower is large, the area of ​​the follower can be set larger, so that the follower has a larger force-bearing area, which is also beneficial to improving the compliance of the follower, thereby improving the compliance of the speaker module.

[0065] In some embodiments, the magnetic assembly includes multiple groups, and the multiple groups of magnetic assemblies are arranged along the circumference of the driven member.

[0066] In this embodiment, multiple groups of magnetic components can make the follower receive force from multiple force points, so that the force on the follower is more balanced, and multiple groups of magnetic components can form a centering effect on the follower, so that the follower moves mainly along the first direction, making the follower more reliable.

[0067] In some embodiments, the sound generating unit has a diaphragm, and the first direction is parallel to the vibration direction of the diaphragm.

[0068] In this embodiment, since the length and width of the follower occupy a larger space, and in the direction perpendicular to the first direction, the follower reuses the space occupied by the length and width of the diaphragm, the length and width dimensions of the speaker module are hardly increased; and since the thickness of the diaphragm is relatively small, in the first direction, the arrangement of the follower has little effect on the thickness dimension of the speaker module; therefore, the arrangement direction of the follower is conducive to the miniaturization and thinning of the speaker module.

[0069] In some embodiments, when the follower deforms and moves away from the initial position, the force of the magnetic assembly on the follower is greater than the deformation restoring force of the follower 3 .

[0070] In this embodiment, when the sound-emitting unit vibrates the air in the first cavity, the air in the first cavity has an initial driving force on the follower, and the follower will deviate from the equilibrium position. Then the magnetic force on the follower increases, and the magnetic force is greater than the deformation force of the follower. The magnetic force of the magnetic assembly will eliminate the influence of the deformation of the follower itself on the compliance of the speaker module, which is conducive to further increasing the compliance of the speaker module. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0072] Figure 1 It is a schematic diagram of the structure of a general speaker module;

[0073] Figure 2 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0074] Figure 3 yes Figure 2 A schematic diagram of the internal structure of a speaker module of an electronic device in some embodiments;

[0075] Figure 4a yes Figure 3 A is a schematic diagram of the structure of some embodiments;

[0076] Figure 4b yes Figure 3 A is a schematic diagram of the structure of other embodiments;

[0077] Figure 4c yes Figure 3 A is a schematic diagram of the structure of some other embodiments;

[0078] Figure 5 yes Figure 3 The structure diagram of the speaker module shown is in use;

[0079] Figure 6 yes Figure 3 A partial structural schematic diagram of the speaker module shown;

[0080] Figure 7 yes Figure 2 The structure schematic diagram of the speaker module of the electronic device in other embodiments is shown;

[0081] Figure 8 yes Figure 7 The structure diagram of the speaker module shown is in use;

[0082] Fig. 9 is a schematic diagram of the internal structure of another electronic device provided in an embodiment of the present application;

[0083] Fig.10 This is a schematic diagram of the internal structure of another electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0084] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0085] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified 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. "Multiple" means at least two.

[0086] The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "inside", "outside", "top", "bottom", "side", etc., are only references to the directions of the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0087] In the embodiments of the present application, the limitations of the relative position relationship mentioned, such as parallel, vertical, aligned, etc. These limitations are all for the current state of the art, rather than absolutely strict limitations, and a small amount of deviation is allowed, and it is possible to be approximately parallel, approximately vertical, approximately aligned, etc. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0088] 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, the features defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features.

[0089] See also Figure 1 , Figure 1 It is a schematic diagram of the structure of a general speaker module 200.

[0090] In a general speaker module 200, the speaker module 200 includes a housing 2001 and a sound unit 2002, and the sound unit 2002 is fixed to the housing 2001. The sound unit 2002 has a diaphragm 2003, one side of which is connected to the outside of the speaker module 200, and this side generally forms a front cavity of the speaker module 200; the other side of the diaphragm 2003 forms a closed cavity with the housing 2001, and the closed cavity is also the rear sound cavity 2004 of the speaker module 200. When the diaphragm 2003 vibrates, the diaphragm 2003 vibrates the air to generate sound and propagates to the outside of the speaker module 200 through the front cavity.

[0091] In addition, when the diaphragm 2003 of the sound unit 2002 vibrates, it will generate a force on the air in the rear sound cavity 2004, causing the air in the rear sound cavity 2004 to be compressed and expanded. When the air in the rear sound cavity 2004 is compressed and expanded, an elastic reaction force will be generated, which acts on the diaphragm 2003 of the sound unit 2002, thereby suppressing the vibration of the diaphragm 2003 of the sound unit 2002, resulting in a decrease in the low-frequency performance of the speaker module 200.

[0092] In a general speaker module 200, the low-frequency resonance frequency Ft of the sound unit 2002 is:

[0093] ;

[0094] Wherein, Mt is the vibration mass of the sound unit 2002, and Ct is the compliance of the sound unit 2002.

[0095] The low-frequency resonance frequency Fs of the speaker module 200 is:

[0096] ；

[0097] in:

[0098] ；

[0099] ；

[0100] Among them, Cs is the compliance of the speaker module 200, Cv is the equivalent compliance of the air volume in the rear sound cavity 2004; V is the air volume in the rear sound cavity 2004; ρ is the air density; C is the speed of sound in the air; St is the equivalent vibration area of ​​the sound unit 2002.

[0101] The lower the resonant frequency of the speaker module 200, the better its low-frequency characteristics are generally, which means that it can produce richer bass. Therefore, if the resonant frequency of the speaker module 200 is low, the bass performance is generally better. It can be seen from the above formula that when the compliance of the speaker module 200 is greater, the low-frequency resonant frequency of the speaker module 200 is smaller, and the low-frequency characteristics of the speaker module 200 are better. In a general speaker module 200, one way is to increase the volume of the rear sound cavity 2004 to increase the equivalent compliance of the rear sound cavity 2004, thereby increasing the equivalent compliance of the speaker module 200, and then improving the low-frequency characteristics of the speaker module 200. However, with the miniaturization design requirements of the speaker module 200, it is difficult for the rear sound cavity 2004 of the speaker module 200 to be increased significantly.

[0102] See also Figure 2 , Figure 2 It is a structural diagram of an electronic device 100 provided in an embodiment of the present application.

[0103] In some embodiments, the electronic device 100 may be a device with an audio playback function, such as 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. Among them, the wearable device may be a smart bracelet, a smart watch, a smart head display, smart glasses, etc. Figure 2 The electronic device 100 of the illustrated embodiment is described by taking a mobile phone as an example. Of course, other types of electronic devices 100 may also adopt similar structures, which will not be described in detail below.

[0104] Exemplarily, the electronic device 100 may include a speaker module 10, a housing 20, and a display screen 30. The housing 20 may include a middle frame 201 and a cover plate 202, and the cover plate 202, the speaker module 10, the middle frame 201, and the display screen 30 may be stacked in sequence.

[0105] Exemplarily, the middle frame 201 may be roughly rectangular in structure, and the shape of the middle frame 201 may be roughly the same as the shape of the electronic device 100. The middle frame 201 may serve as the main structural component of the electronic device 100 to carry and install the components of the electronic device 100. The middle frame 201 may form a plurality of slots or chambers to install the components of the electronic device 100. Among them, the middle frame 201 may be formed by splicing and assembling a plurality of components, and when the structure of the middle frame 201 is relatively complex, it is helpful to simplify the molding of the middle frame 201.

[0106] The main material of the middle frame 201 can be a metal material, for example, aluminum alloy, magnesium alloy, stainless steel, titanium alloy, etc. The middle frame 201 can also have a plastic insert, etc., which is not strictly limited in this example. In some other examples, the main material of the middle frame 201 can be plastic.

[0107] Exemplarily, the display screen 30 may be fixedly connected to one side of the middle frame 201. For example, the display screen 30 may be fixedly connected to the middle frame 201 by bonding, snapping, or the like.

[0108] The display screen 30 may be electrically connected to the middle frame 201 to achieve grounding of the display screen 30 , thereby protecting the display screen 30 .

[0109] Among them, the display screen 30 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MIL-OLED) display screen, a micro organic light-emitting diode (MIL-LED) display screen, a micro organic light-emitting diode (MIL-LED) display screen, a quantum dot light emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0110] The display screen 30 may be a flat screen, and the area of ​​the display screen 30 may occupy most of the area of ​​the middle frame 201 to provide a better display effect. In some other embodiments, the display screen 30 may be a curved screen, a folding screen, or a flexible screen, which may be specifically configured according to the requirements of the electronic device 100, and is not strictly limited in this embodiment.

[0111] Exemplarily, the speaker module 10 may be installed in the housing 20 , and the speaker module 10 may be located inside the electronic device 100 .

[0112] The speaker module 10 may be located on the top side of the electronic device 100. The speaker module 10 may be fixedly mounted on the middle frame 201.

[0113] There may be more than one speaker module 10. For example, the electronic device 100 may have two speaker modules 10, one of which may be located on the top side of the electronic device 100, and the other speaker module 10 may be located on the bottom side of the electronic device 100. The speaker module 10 on the top side and the speaker module 10 on the bottom side may emit sound simultaneously or independently, which may be set according to different usage scenarios.

[0114] The electronic device 100 may be provided with a sound hole 1001, and the sound emitted by the speaker module 10 is transmitted to the outside of the electronic device 100 through the sound hole 1001. For example, the bottom of the middle frame 201 may be provided with a sound hole 1001, and the sound hole 1001 is arranged corresponding to the speaker module 10 on the bottom side. The middle frame 201 or the display screen 30 on the top side of the electronic device 100 may be provided with a sound hole 1001, and the sound hole 1001 is arranged corresponding to the speaker module 10 on the top side.

[0115] It is understandable that when the speaker module 10 is connected to alternating current with different characteristics (such as frequency and voltage), the diaphragm 21 can produce sound at the corresponding frequency and loudness, thereby producing the desired sound.

[0116] Exemplarily, the cover plate 202 may be fixedly connected to the side of the middle frame 201 facing away from the display screen 30. For example, the cover plate 202 may be fixedly connected to the middle frame 201 by bonding, snapping, or the like.

[0117] The middle frame 201 may be provided with an installation slot (not shown), and the cover plate 202 may be installed in the installation slot, and the cover plate 202 closes the side of the middle frame 201 connected thereto, thereby protecting the components between the cover plate 202 and the middle frame 201. The cover plate 202 may be sealedly connected to the middle frame 201 to prevent impurities such as water and dust outside the electronic device 100 from entering the inside of the electronic device 100, thereby achieving waterproof and dustproof properties of the electronic device 100.

[0118] The shape of the cover plate 202 may be substantially rectangular, and the area of ​​the cover plate 202 may be substantially the same as the area of ​​the middle frame 201. The material of the cover plate 202 may be glass, ceramic, metal, etc., which is not strictly limited in this embodiment.

[0119] In some embodiments, the electronic device 100 may further include multiple modules (not shown in the figure), and the multiple modules may be housed in the middle frame 201. The multiple modules of the electronic device 100 may include but are not limited to batteries, circuit boards, camera modules, earpiece modules, microphone modules, sensor modules, etc. The embodiment of the present application does not specifically limit the number, type, position, etc. of the modules of the electronic device 100.

[0120] See also Figure 3 , Figure 3 yes Figure 2 The illustrated diagram is a schematic diagram of the internal structure of the speaker module 10 of the electronic device 100 in some embodiments.

[0121] In some embodiments, the speaker module 10 may include a housing 1 and a sound unit 2 , and the sound unit 2 may be fixedly connected to the housing 1 .

[0122] Exemplarily, the housing 1 may be a cover structure. The housing 1 may be provided with an opening 11, and a cavity is formed inside the housing 1, and the cavity is connected to the outside of the housing 1 through the opening 11. The sound unit 2 may be fixed to the opening 11, and together with the housing 1, form a rear sound cavity of the speaker module 10.

[0123] Exemplarily, the sound unit 2 may include a diaphragm 21, a basin frame 22, a voice coil (not shown), and a magnetic circuit assembly (not shown). The diaphragm 21 and the magnetic circuit assembly may be fixed to the basin frame 22, the diaphragm 21 and the magnetic circuit assembly are arranged relative to each other, the magnetic circuit assembly may have a magnetic gap, one end of the voice coil is fixed to the diaphragm 21, and the other end is located in the magnetic gap of the magnetic circuit assembly. When the voice coil is energized, the voice coil and the magnetic circuit assembly generate an interaction force, the voice coil is driven, and since the voice coil is fixedly connected to the diaphragm 21, the voice coil drives the diaphragm 21 to vibrate, thereby producing sound.

[0124] The basin frame 22 can be fixedly connected to the housing 1. The basin frame 22 can be installed in the opening 11 of the housing 1 to fix the sound unit 2 to the housing 1. The basin frame 22 is used to support the diaphragm 21, voice coil and magnetic circuit components of the sound unit 2. The sound unit 2 is installed in the housing 1 by bonding the basin frame 22 to the opening 11 of the housing 1. In some examples, the basin frame 22 and the housing 1 can be relatively independent components, and the basin frame 22 can be connected to the housing 1 by bonding, welding, etc. In some other examples, the basin frame 22 and the housing 1 can be integrally formed components.

[0125] The space on one side of the diaphragm 21 is connected to the external space of the housing 1 to achieve the vibration and sound generation of the diaphragm 21. For example, one side surface of the diaphragm 21 may be exposed to the housing 1. In some other embodiments, one side surface of the diaphragm 21 may be connected to the external space of the housing 1 through a channel. The space on the other side of the diaphragm 21 may form the rear sound cavity of the speaker module 10.

[0126] In some embodiments, the speaker module 10 may further include a follower 3 and a magnetic component 4 .

[0127] Among them, the follower 3 can be fixedly connected to the inner side of the housing 1, that is, the follower 3 is located in the rear sound cavity of the speaker module 10. The follower 3 can be sealed and connected to the housing 1, and separate the rear sound cavity of the speaker module 10 into a first cavity 5 and a second cavity 6, that is, the rear sound cavity of the speaker module 10 includes a first cavity 5 and a second cavity 6. Among them, the first cavity 5 and the second cavity 6 are not connected to each other. It can be understood that one side of the follower 3 is the first cavity 5, and the other side is the second cavity 6. The follower 3 is used to simultaneously form partial cavity walls of the first cavity 5 and the second cavity 6, and plays a role in isolating the first cavity 5 and the second cavity 6. For example, the first cavity 5 can be a cavity that communicates with the sound unit 2, and the second cavity 6 can be a cavity that is not connected with the sound unit 2.

[0128] Exemplarily, the rear sound cavity may be a sealed cavity, and the first cavity 5 and the second cavity 6 may also be sealed cavities respectively, and the first cavity 5 and the second cavity 6 are not connected to the outside of the speaker module 10. In some other embodiments, the first cavity 5 and the second cavity 6 may be connected to the outside of the speaker module 10 through a pressure relief hole, and the diameter of the pressure relief hole needs to be set to be small, so that when the speaker module 10 vibrates, the first cavity 5 and the second cavity 6 almost do not generate gas circulation with the outside, so that the first cavity 5 and the second cavity 6 form a relatively closed state.

[0129] Among them, at least part of the structure of the follower 3 has the ability to deform, and the structure of the follower 3 with the ability to deform can be deformed along the first direction. Among them, the specific direction of the first direction is not strictly limited, and the first direction means that when the follower 3 is subjected to an external force, the structure of the follower 3 with the ability to deform can at least be deformed along the first direction. It can be understood that the follower 3 can have a partial structure with the ability to deform, or the entire structure can have the ability to deform.

[0130] The follower 3 may be substantially in the form of a plate, and the first direction may be perpendicular to the plate to facilitate deformation of the plate. The follower 3 may be spaced apart from the sound generating unit 2 to facilitate deformation of the follower 3.

[0131] In some examples, the first direction may be parallel to the vibration direction of the diaphragm 21 of the speaker module 10. For example, the follower 3 and the diaphragm 21 are arranged along the first direction and are arranged relative to each other. At this time, since the length and width of the follower 3 occupy a large space, and in the direction perpendicular to the first direction, the follower 3 reuses the space occupied by the length and width of the diaphragm 21, and the length and width dimensions of the speaker module 10 are almost not increased; and since the thickness of the diaphragm 21 is small, in the first direction, the setting of the follower 3 has little effect on the thickness dimension of the speaker module 10; therefore, the arrangement direction of the follower 3 is conducive to the miniaturization and thinning of the speaker module 10. In some other examples, the first direction may intersect with the vibration direction of the diaphragm 21. For example, the first direction is perpendicular to the vibration direction of the diaphragm 21, and at this time, the follower 3 may also be approximately perpendicular to the diaphragm 21; the first direction may be set according to the shape of the speaker module 10, and this embodiment does not strictly limit this.

[0132] It is understandable that when the follower 3 is deformed by force, since the first cavity 5 and the second cavity 6 are closed cavities, the volumes of the first cavity 5 and the second cavity 6 may change accordingly, such as compression or expansion. The change in the volume of the first cavity 5 or the second cavity 6 will also generate a reaction force on the follower 3.

[0133] The magnetic component 4 may be located in the first cavity 5 or the second cavity 6 , and may be specifically arranged according to the structure of the speaker module 10 .

[0134] The magnetic assembly 4 may include a first magnetic component 41 , a second magnetic component 42 and a third magnetic component 43 .

[0135] Exemplarily, the first magnetic component 41 and the second magnetic component 42 are fixed to the housing 1 and arranged at intervals along the first direction, the third magnetic component 43 is fixed to the follower 3, and the third magnetic component 43 is located between the first magnetic component 41 and the second magnetic component 42. There is a magnetic attraction force between the third magnetic component 43 and the first magnetic component 41, and between the third magnetic component 43 and the second magnetic component 42. Among them, the third magnetic component 43 is located between the first magnetic component 41 and the second magnetic component 42, which means that the center position of the third magnetic component 43 is located in the three-dimensional space between the center position of the first magnetic component 41 and the center position of the second magnetic component 42. For example, the center position of the third magnetic component 43 can be located on the line connecting the center position of the first magnetic component 41 and the center position of the second magnetic component 42, or the center position of the third magnetic component 43 can be located on the peripheral side of the line, and it is not required that the third magnetic component 43 and the first magnetic component 41 and the second magnetic component 42 are strictly arranged along the first direction. For example, as Figure 3 In the embodiment, the third magnetic member 43 is located at the lower side of the line connecting the first magnetic member 41 and the second magnetic member 42. In some other embodiments, the third magnetic member 43 may be located between the line connecting the first magnetic member 41 and the second magnetic member 42.

[0136] In some examples, the first magnetic member 41 and the second magnetic member 42 may be independent components, respectively, and are respectively fixed to the housing 1. In some other embodiments, the first magnetic member 41 and the second magnetic member 42 may be formed by different parts of a component, but other structures of the component cannot affect the arrangement of the first magnetic member 41 and the second magnetic member 42 in the speaker module 10.

[0137] It is understandable that the third magnetic member 43 has magnetic attraction with the first magnetic member 41, and the third magnetic member 43 also has magnetic attraction with the second magnetic member 42, so the third magnetic member 43 has a balanced position between the first magnetic member 41 and the second magnetic member 42. In some examples, the first magnetic member 41 and the second magnetic member 42 can be symmetrically arranged relative to the third magnetic member 43.

[0138] Since the first magnetic member 41 and the second magnetic member 42 are arranged along the first direction, and the third magnetic member 43 is located between the first magnetic member 41 and the second magnetic member 42, the magnetic force exerted on the third magnetic member 43 can be parallel to the first direction; in addition, since the follower 3 can be deformed along the first direction, when the follower 3 deviates from the equilibrium position, the magnetic force exerted on the third magnetic member 43 gradually increases, and the greater the displacement of the third magnetic member 43, the greater the magnetic force exerted on it. The third magnetic member 43 applies force to the follower 3, causing the follower 3 to deform in the first direction toward a direction away from the initial position. At this time, the force direction of the follower 3 is the same as the deformation direction. In the speaker module 10, since the gases in the first cavity 5 and the second cavity 6 are on both sides of the follower 3, the follower 3 will push the gases in the first cavity 5 or the second cavity 6 to move in the same direction, that is, the air in the first cavity 5 and the second cavity 6 can be pushed a larger distance with a smaller force. The first cavity 5 and the second cavity 6 are softer as a whole and have a larger compliance value, thereby increasing the compliance value of the rear sound cavity of the speaker module 10.

[0139] When the sound unit 2 makes a sound, the diaphragm 21 of the sound unit 2 will vibrate the air. Taking the diaphragm 21 of the sound unit 2 compressing the air in the first cavity 5 as an example, after the air in the first cavity 5 is compressed, the air in the first cavity 5 will squeeze the follower 3. The follower 3 is deformed after being squeezed, and actively compresses the air in the second cavity 6, and simultaneously pulls the air in the first cavity 5 (equivalent to reducing the degree of compression of the air in the first cavity 5). The follower 3 is equivalent to making the air in the first cavity 5 and the second cavity 6 easier to be compressed, and the reaction force of the air in the first cavity 5 and the second cavity 6 on the diaphragm 21 of the sound unit 2 is also smaller. The air in the first cavity 5 and the second cavity 6 will have less influence on the diaphragm 21 of the sound unit 2, so that the low-frequency performance of the speaker module 10 is better.

[0140] It can be understood that since the first cavity 5 and the second cavity 6 are not connected, when the follower 3 is not subjected to force, the combined force of the air pressure in the first cavity 5 and the second cavity 6, the force between the magnetic component 4 and the deformation recovery force of the follower 3 will drive the follower 3 to return to its initial equilibrium position.

[0141] In this embodiment, by providing the follower 3 and the magnetic assembly 4, the follower 3 in the speaker module 10 has a tendency to deviate from the initial position when driven by force, thereby increasing the compliance value of the rear sound cavity of the speaker module 10 and improving the low-frequency performance of the speaker module 10. In addition, the structures of the follower 3 and the magnetic assembly 4 are relatively simple and reasonable, and the volume of the speaker module 10 is basically not increased, which is conducive to the miniaturization design of the speaker module 10.

[0142] In some embodiments, when the follower 3 deforms and moves away from the initial position, the force of the magnetic assembly 4 on the follower 3 is greater than the deformation recovery force of the follower 3. At this time, when the sound unit 2 vibrates the air in the first cavity 5, the air in the first cavity 5 has an initial driving force on the follower 3, and the follower 3 will deviate from the equilibrium position, and then the magnetic force on the follower 3 increases, and the magnetic force is greater than the deformation force of the follower 3. The magnetic force of the magnetic assembly 4 will eliminate the influence of the deformation of the follower 3 itself on the compliance of the speaker module 10, which is conducive to further increasing the compliance of the speaker module 10.

[0143] In some embodiments, the speaker module 10 may have a fixing portion 7. The fixing portion 7 may be formed by the inner wall of the housing 1 protruding inward. The fixing portion 7 may be roughly annular, and the middle of the fixing portion 7 may form a avoidance area, and most of the structure of the follower 3 may be located in the avoidance area. The shape of the fixing portion 7 may be set corresponding to the shape of the follower 3 to facilitate the installation of the follower 3. The edge of the follower 3 may be sealed and fixed to the edge of the fixing portion 7, for example, the seal may be bonded to the fixing portion 7.

[0144] In some embodiments, the speaker module 10 may have a first connection portion 8, and the first connection portion 8 is used to be fixedly connected to the first magnetic member 41. The follower 3 may have a second connection portion 9, and the second connection portion 9 is used to be fixedly connected to the third magnetic member 43.

[0145] For example, the first connection portion 8 can be formed by the inner wall of the housing 1 protruding inward, and the first connection portion 8 can be roughly a rod-shaped structure or a plate-shaped structure. The second connection portion 9 can be fixed to the surface of the follower 3 and can extend along the first direction. The first magnetic member 41 can be fixed to the end of the first connection portion 8, the second magnetic member 42 can be fixed to the side of the fixing portion 7 facing the first connection portion 8, and the third magnetic member 43 can be fixed to the end of the second connection portion 9.

[0146] In some embodiments, the follower 3 may include a follower portion 31 and a deformation portion 32. The deformation portion 32 connects the follower portion 31 and the housing 1.

[0147] The driven part 31 may be roughly in a plate-like structure. The driven part 3 may be rectangular or circular, and may be specifically set according to the shape of the speaker module 10. In some examples, the driven part 31 may be located in the avoidance zone, and the area of ​​the driven part 31 may be close to the area of ​​the diaphragm 21 of the sound unit 2, but it is not strictly limited thereto. For example, the area of ​​the driven part 31 may be larger or smaller than the area of ​​the diaphragm 21.

[0148] The deformation part 32 may be roughly annular in structure, and the deformation part 32 may be deformable. The deformation part 32 may be a thin-walled part to facilitate deformation. The deformation part 32 may have a folding ring part, the cross section of the folding ring part may be a curved surface, and the folding ring part may have good deformation ability, so that the deformation part 32 has good deformation ability.

[0149] The deformation part 32 can seal and connect the driven part 31 and the housing 1, and the deformation part 32 can be arranged around the circumference of the driven part 31. For example, the inner edge of the deformation part 32 can be bonded to the circumference of the driven part 31, and the outer edge of the deformation part 32 can be bonded to the fixing part 7.

[0150] Exemplarily, the deformation portion 32 may be made of an elastic material with airtightness, such as rubber, silicone, sizing cloth, polyester film, etc.

[0151] In some examples, the rigidity of the deformation part 32 can be less than the rigidity of the driven part 31. Among them, the rigidity of the driven part 31 can be set to be larger, so that it is not easy to deform. Among them, the rigidity of the deformation part 32 can be set to be smaller, so that it is easier to deform, making the driven member 3 softer, that is, the elasticity of the deformation part 32 is smaller, so that the combined force of the magnetic component 4 and the deformation part 32 drives the driven part 31 to move. When the driven member 3 is pushed by the air, the driven part 31 will hardly deform, or mainly rigid deformation, while the deformation part 32 will be elastically deformed, and the driven part 31 will be displaced at the same time, and the displacement can be mainly along the first direction. At this time, the force on the driven member 3 is more uniform, and the deformation is also more uniform; and because the rigidity of the driven part 31 is large, the area of ​​the driven part 31 can be set to be larger, so that the driven member 3 has a larger force area, which is also conducive to improving the compliance of the driven member 3, thereby improving the compliance of the speaker module 10.

[0152] In some other embodiments, the follower 3 may be an integrally formed structural member. Among them, the follower 3 may be a flexible member or an elastic member, and the rigidity of the follower 3 is less than the rigidity of the fixing portion 7. Since the rigidity of the follower 3 is greater than that of the fixing portion 7, the follower 3 will be deformed first when the air in the speaker module 10 vibrates. For example, the follower 3 may be made of a flexible material such as polyester, and the follower 3 may have a certain elasticity, but the elasticity of the follower 3 may be as small as possible to facilitate deformation. It is understandable that the follower 3 not only needs to be able to deform itself, but also needs to be able to withstand the force of the magnetic component 4, so the follower 3 needs to be set with appropriate rigidity. At this time, the follower 3 has a relatively simple structure and is easy to manufacture and install.

[0153] In some embodiments, in the first direction, the third magnetic component 43 may not overlap with the projections of the first magnetic component 41 and the second magnetic component 42. Among them, since the first magnetic component 41 and the second magnetic component 42 are arranged along the first direction, the projections of the first magnetic component 41 and the second magnetic component 42 in the first direction overlap. The third magnetic component 43 can be completely misaligned with the first magnetic component 41 and the second magnetic component 42 in a direction perpendicular to the first direction, so that the projections of the third magnetic component 43 and the first magnetic component 41 and the second magnetic component 42 do not overlap. At this time, when the speaker module 10 is impacted, or when the third magnetic component 43 moves a large distance in the first direction during the operation of the speaker module 10, the third magnetic component 43 can be prevented from colliding with the first magnetic component 41 and the second magnetic component 42, thereby preventing the follower 3 from being unable to move, preventing the follower 3 from failing, and improving the reliability of the speaker module 10.

[0154] In some other embodiments, in the first direction, the third magnetic member 43 may overlap with the projections of the first magnetic member 41 and the second magnetic member 42. The distance between the first magnetic member 41 and the second magnetic member 42 is greater than the range of the reciprocating motion of the third magnetic member 43, thereby avoiding collision. At this time, the position arrangement of the first magnetic member 41, the second magnetic member 42 and the second magnetic member 42 is relatively simple and easy to install.

[0155] In some embodiments, the magnetic assembly 4 may have multiple groups, and the multiple groups of magnetic assemblies 4 may be arranged along the circumference of the follower 3. Among them, the multiple groups of magnetic assemblies 4 may be evenly distributed around the circumference of the follower 3. For example, the number of magnetic assemblies 4 may be 2 groups, 3 groups, 4 groups, etc. At this time, the multiple groups of magnetic assemblies 4 can make the follower 3 receive force from multiple force points, and the force on the follower 3 is more balanced, and the multiple groups of magnetic assemblies 4 can form a centering effect on the follower 3, so that the follower 3 moves mainly in the first direction when moving, making the follower 3 more reliable.

[0156] Of course, the magnetic assembly 4 can be a group. In this case, the magnetic assembly 4 can be located in the middle of the follower 3, so that the force of the magnetic assembly 4 on the follower 3 acts on the middle of the follower 3, so that the follower 3 is mainly deformed along the first direction. Alternatively, the magnetic assembly 4 can be located on one side of the follower 3. In the speaker module 10, the follower 3 has good rigidity perpendicular to the first direction, thereby preventing the follower 3 from being deflected by the deflection torque of the magnetic assembly 4.

[0157] Please refer to Figures 4a to 4c , Figure 4a yes Figure 3 A is a schematic diagram of the structure of some embodiments; Figure 4b yes Figure 3 A is a schematic diagram of the structure of other embodiments; Figure 4c yes Figure 3A is a schematic diagram of the structure of some other embodiments.

[0158] In some embodiments, one or more of the first magnetic component 41 , the second magnetic component 42 , and the third magnetic component 43 in the magnetic assembly 4 may be a magnetic component.

[0159] like Figure 4a In some examples, the first magnetic member 41 and the second magnetic member 42 may be magnetic members, and the third magnetic member 43 may be a magnetic conductive member. The third magnetic member 43 itself does not have magnetism, but it can generate magnetic attraction with the first magnetic member 41 and the second magnetic member 42.

[0160] Among them, the third magnetic member 43 can be made of but not limited to iron-containing magnetic conductive materials. In some examples, the two magnetic poles of each of the first magnetic member 41 and the second magnetic member 42 can be arranged along the first direction. In some examples, the magnetism of the relative magnetic poles of the first magnetic member 41 and the second magnetic member 42 can be the same. For example, the magnetic poles of the first magnetic member 41 and the second magnetic member 42 are arranged along the first direction, and the magnetic poles of the first magnetic member 41 and the second magnetic member 42 are arranged oppositely to each other as N poles, and the magnetic poles arranged oppositely to each other as S poles. In some other examples, the two magnetic poles of each of the first magnetic member 41 and the second magnetic member 42 can also be arranged in a direction intersecting with the first direction. In some other examples, the magnetism of the relative magnetic poles of the first magnetic member 41 and the second magnetic member 42 can also be opposite, and this example does not strictly limit this.

[0161] In this example, since the third magnetic component 43 is a magnetic conductive component, the third magnetic component 43 can easily generate magnetic attraction with the first magnetic component 41 and the second magnetic component 42, making the structure of the magnetic component 4 simpler and facilitating the arrangement of the first magnetic component 41 and the second magnetic component 42.

[0162] like Figure 4b In some examples, the third magnetic member 43 may be a magnetic member, and the first magnetic member 41 and the second magnetic member 42 may be magnetic conductive members. The first magnetic member 41 and the second magnetic member 42 themselves do not have magnetism, but the first magnetic member 41 and the second magnetic member 42 can generate magnetic attraction with the third magnetic member 43. The first magnetic member 41 and the second magnetic member 42 may be made of, but not limited to, ferrous magnetic conductive materials. In some examples, the two magnetic poles of the third magnetic member 43 may extend along the first direction. For example, the magnetic pole of the third magnetic member 43 close to the first magnetic member 41 is the S pole, and the magnetic pole close to the second magnetic member 42 is the N pole. In some other examples, the two magnetic poles of the third magnetic member 43 may also extend in a direction intersecting with the first direction.

[0163] In this example, since the first magnetic component 41 and the second magnetic component 42 are both magnetic conductive components, the first magnetic component 41 and the second magnetic component 42 can easily generate magnetic attraction with the third magnetic component 43, making the structure of the magnetic component 4 simpler and facilitating the setting of the third magnetic component 43.

[0164] like Figure 4c In some examples, the first magnetic member 41, the second magnetic member 42 and the third magnetic member 43 can all be magnetic members. In the first direction, the magnetic poles of the first magnetic member 41 and the third magnetic member 43 that are close to each other are opposite, and the magnetic poles of the second magnetic member 42 and the third magnetic member 43 that are close to each other are opposite. For example, in the first direction, the magnetic poles of the first magnetic member 41, the second magnetic member 42 and the third magnetic member 43 are arranged along the first direction respectively, the first magnetic member 41 and the second magnetic member 42 are arranged opposite to each other, and the magnetic pole of the first magnetic member 41 facing the second magnetic member 42 is the S pole, and the magnetic pole of the second magnetic member 42 facing the first magnetic member 41 is the N pole. One magnetic pole of the third magnetic member 43 is arranged close to the S pole of the first magnetic member 41, and the magnetic pole of the third magnetic member 43 is the N pole, and the other magnetic pole of the third magnetic member 43 is arranged close to the N pole of the second magnetic member 42, and the other magnetic pole of the third magnetic member 43 is the S pole.

[0165] In this example, since the first magnetic component 41, the second magnetic component 42 and the third magnetic component 43 are all magnetic components, it is easy to make the magnetic attraction between different magnetic components larger, and the arrangement of the magnetic poles can be set to adjust the change trend of the magnetic attraction, thereby adjusting the compliance of the follower 3.

[0166] See also Figure 5 , Figure 5 yes Figure 3 The structure diagram of the speaker module 10 is shown in FIG. 1 .

[0167] In the embodiment of the present application, the third magnetic component 43 is located between the first magnetic component 41 and the second magnetic component 42. The third magnetic component 43 is subjected to the magnetic force F1 of the first magnetic component 41 and the magnetic force F2 of the second magnetic component 42. The directions of F1 and F2 are opposite and will cancel each other out to form a combined force of the magnetic force F.

[0168] When the diaphragm 21 of the speaker module 10 vibrates and pushes the air in the first cavity 5, the follower 3 moves slightly, the third magnetic member 43 moves synchronously toward the second magnetic member 42, and the magnetic force F gradually increases in the direction of the movement of the third magnetic member 43, that is, at this time, the magnetic force F tends to move the follower 3 away from the initial position to the direction of the second magnetic member 42 relative to the first magnetic member 41. Similarly, when the third magnetic member 43 moves toward the first magnetic member 41, the magnetic force F gradually increases in the direction of the movement of the third magnetic member 43, that is, at this time, the magnetic force tends to move the follower 3 away from the initial position to the direction of the first magnetic member 41 relative to the second magnetic member 42. The magnetic force F is equivalent to an elastic force, which drives the follower 3 to move in the direction away from the initial position. The greater the displacement, the greater the elastic force; the compliance value of the elastic force is set to Cd, because the direction of the elastic force is the same as the direction of the displacement, and its value is negative. Therefore, by providing the magnetic component 4 , the air in the first cavity 5 and the second cavity 6 can be driven more easily, making the compliance of the rear sound cavity greater, which is beneficial to improving the low-frequency characteristics of the speaker module 10 .

[0169] It can be understood that during the movement of the follower 3 , due to the presence of a restoring deformation force on the follower 3 and the pressure difference between the first cavity 5 and the second cavity 6 , the follower 3 can be restored to its initial equilibrium state.

[0170] Please refer to Figure 5 and Figure 6 , Figure 6 yes Figure 3 A partial structural schematic diagram of the speaker module 10 is shown.

[0171] In the embodiment of the present application, the low-frequency resonance frequency Fs' of the speaker module 10 is:

[0172] ；

[0173] in:

[0174] ；

[0175] in:

[0176] ；

[0177] Among them, Mt is the vibrating mass of the sound generating unit 2, Cs' is the compliance of the loudspeaker module 10 of the present application, Ct is the compliance of the sound generating unit 2, Cv1 is the equivalent compliance of the air in the first cavity 5, Cv2 is the equivalent compliance of the air in the second cavity 6, Cd is the compliance generated by the magnetic force assembly 4 on the follower 3, Cr is the compliance generated by the follower 3 itself, and Cv2' is the total compliance formed by the magnetic force assembly 4, the follower 3, and the air in the second cavity 6.

[0178] Please refer to Figure 6 , in a general loudspeaker module, by removing the magnetic force assembly 4 and the follower 3 of the loudspeaker module 10 of the present application, the low-frequency resonance frequency Fs of the obtained general loudspeaker module is:

[0179] ；

[0180] Among them:

[0181] ；

[0182] Among them, Mt is the vibrating mass of the sound generating unit 2, Cs is the compliance of the general loudspeaker module, Ct is the compliance of the sound generating unit 2, Cv1 is the equivalent compliance of the air in the first cavity 5, and Cv2 is the equivalent compliance of the air in the second cavity 6.

[0183] By comparison, when Cv2'>Cv2, Fs'<Fs, that is, the low-frequency resonance frequency of the loudspeaker module 10 of the present application decreases compared with that of the general loudspeaker module, and the low-frequency performance of the loudspeaker module 10 of the present application is improved.

[0184] ；

[0185] That is:

[0186] ；

[0187] That is to say:

[0188] 0；

[0189] Among them, the force of the magnetic force assembly 4 on the follower 3 is in the same direction as the displacement direction of the follower 3. Therefore, the value of the compliance Cd generated by the magnetic force assembly 4 on the follower 3 is negative. That is to say, making the absolute value of Cd greater than the sum of Cr and Cv2 can satisfy Fs'<Fs.

[0190] As an example, Figure 6 When the shown loudspeaker module emits sound, its resonance frequency can be 900 Hz (Hertz). Figure 3 When the speaker module is emitting sound, its resonant frequency may be 650 Hz. When the volume of the rear sound cavity of the speaker module remains unchanged, the follower 3, the magnetic assembly 4, etc. may be provided to reduce the resonant frequency of the speaker module and increase the sound pressure level in the low frequency band, thereby improving the low frequency performance of the speaker module or the electronic device.

[0191] Please refer to Figure 7 and Figure 8 , Figure 7 yes Figure 2 The structure schematic diagram of the speaker module 10 of the electronic device 100 in other embodiments is shown. Figure 8 yes Figure 7 The structure diagram of the speaker module 10 is shown in FIG. 1 . Figure 7 The speaker module 10 shown in the embodiment may include Figure 3 Most of the technical features of the speaker module 10 shown in the embodiment are described below mainly in terms of the differences between the two, and most of the common technical contents between the two are not repeated.

[0192] Figure 7 The speaker module 10 shown in the embodiment is Figure 3 The main difference of the speaker module 10 shown in the embodiment lies in the arrangement of the magnetic component 4 .

[0193] In some embodiments, the magnetic assembly 4 may include a first magnetic member 44 and a second magnetic member 45. The first magnetic member 44 is fixed to the inner side of the housing 1, the second magnetic member 45 is fixed to the driven member 3, the first magnetic member 44 and the second magnetic member 45 are arranged along the second direction, the magnetic properties of the opposite magnetic poles of the first magnetic member 44 and the second magnetic member 45 are the same, and the second direction is perpendicular to the first direction. The structure of the housing 1, the sound unit 2 and the driven member 3 of the speaker module 10 and the connection relationship between the three can be referred to. Figure 3 The relevant description of the embodiment will not be repeated in this embodiment.

[0194] Exemplarily, the first magnetic member 44 may be fixed to the edge of the fixing portion 7 , and the second magnetic member 45 may be fixed to the edge of the driven portion 31 of the driven member 3 , with a gap being left between the first magnetic member 44 and the second magnetic member 45 .

[0195] In the initial position, the component of the magnetic repulsion force of the first magnetic member 44 and the second magnetic member 45 in the first direction of the follower 3 is 0, and the air pressures of the first cavity 5 and the second cavity 6 are equal. At this time, the follower 3 will not move, and the follower 3 is in a balanced state. When the diaphragm 21 of the speaker module 10 starts to vibrate, such as vibrating to the right, the air pressure in the first cavity 5 rises and is greater than the air pressure in the second cavity 6. The pressure difference pushes the follower 3 to deviate from the initial position and move to the right. At this time, the second magnetic member 45 deviates from the initial position and moves to the right. The magnetic repulsion force between the first magnetic member 44 and the second magnetic member 45 generates a force component in the direction of movement of the follower 3 (that is, the first direction), thereby pushing the follower 3 to move to the right. The magnetic force of the first magnetic member 44 and the second magnetic member 45 is equivalent to an elastic force, which drives the follower 3 to move in a direction away from the initial position. The greater the displacement, the greater the elastic force.

[0196] In some embodiments, within the deformation range or movement range of the follower 3, the combined force of the magnetic force of the first magnetic member 44 and the second magnetic member 45 is greater than the deformation force of the follower 3, so that the follower 3 moves away from the initial position. This makes the rear sound cavity of the speaker easier to be compressed or stretched, thereby increasing the compliance of the rear sound cavity of the speaker module 10.

[0197] In this embodiment, by providing the follower 3 and the magnetic assembly 4, the follower 3 in the speaker module 10 has a tendency to deviate from the initial position when driven by force, thereby increasing the compliance value of the rear sound cavity of the speaker module 10 and improving the low-frequency performance of the speaker module 10. In addition, the structures of the follower 3 and the magnetic assembly 4 are relatively simple and reasonable, and the volume of the speaker module 10 is basically not increased, which is conducive to the miniaturization design of the speaker module 10.

[0198] See also Fig. 9 , Fig. 9 1 is a schematic diagram of the internal structure of another electronic device 100 provided in an embodiment of the present application. Fig. 9 The electronic device 100 shown in the embodiment may include Figure 2 Most of the technical features of the electronic device 100 shown in the embodiment are mainly described below. The differences between the two are explained below, and most of the common technical contents between the two are not repeated here. Fig. 9 The electronic device 100 in the illustrated embodiment is described by taking a mobile phone as an example.

[0199] Fig. 9 The electronic device 100 shown in the embodiment is Figure 2 The difference between the electronic device 100 shown in the embodiment mainly lies in the arrangement of the housing 20 and the speaker module 10. In some embodiments, the electronic device 100 includes a housing 20 and a speaker module 10, and the speaker module 10 is installed inside the housing 20.

[0200] Exemplarily, the speaker module 10 may include a housing 1, a sound unit 2, a follower 3 and a magnetic assembly 4, the sound unit 2 and the follower 3 are fixed to the housing 1 at intervals, the follower 3, the sound unit 2 and the housing 1 form a first cavity 5, and the side of the follower 3 facing away from the first cavity 5 forms a second cavity 6.

[0201] The general structure and connection method of the sound unit 2, the follower 3 and the magnetic assembly 4 can be referred to. Figure 2 The relevant descriptions in the embodiments are not repeated in this embodiment.

[0202] The first cavity 5 and the second cavity 6 can both be closed cavities and can form a rear sound cavity of the speaker module 10 to facilitate the speaker module 10 to make sounds. The volume of the second cavity 6 can be greater than the volume of the first cavity 5, and the volume of the second cavity 6 can also be close to the volume of the first cavity 5, which is not strictly limited in this embodiment.

[0203] For example, the electronic device 100 may include a seal 40, which seals and connects the shell 20 and the speaker module 10, so that the shell 20 and the outer shell 1 are sealed and connected, and the second cavity 6 can be surrounded by the shell 20, the outer shell 1 and the follower 3. The seal 40 can be made of materials such as sealant, which is not strictly limited in this embodiment. The seal 40 can be arranged around the sound outlet 1001. Part of the structure of the shell 20 can be used to enclose the second cavity 6. In some other embodiments, the second cavity 6 can also be surrounded by the follower 3 and the outer shell 1 only.

[0204] When the sound unit 2 makes a sound, the diaphragm 21 of the sound unit 2 will vibrate the air. Taking the diaphragm 21 of the sound unit 2 compressing the air in the first cavity 5 as an example, after the air in the first cavity 5 is compressed, the air in the first cavity 5 will squeeze the follower 3. The follower 3 is deformed after being squeezed, and actively compresses the air in the second cavity 6, and simultaneously pulls the air in the first cavity 5 (equivalent to reducing the degree of compression of the air in the first cavity 5). The follower 3 is equivalent to making the air in the first cavity 5 and the second cavity 6 easier to be compressed, and the reaction force of the air in the first cavity 5 and the second cavity 6 on the diaphragm 21 of the sound unit 2 is also smaller. The air in the first cavity 5 and the second cavity 6 will have less influence on the diaphragm 21 of the sound unit 2, so that the low-frequency performance of the speaker module 10 is better.

[0205] It can be understood that since the first cavity 5 and the second cavity 6 are sealed, when the follower 3 is not subjected to force, the combined force of the air pressure in the first cavity 5 and the second cavity 6, the force between the magnetic component 4 and the deformation recovery force of the follower 3 will drive the follower 3 to return to its initial equilibrium position.

[0206] In this embodiment, by providing the follower 3 and the magnetic assembly 4, the follower 3 in the speaker module 10 has a tendency to deviate from the initial position when driven by force, thereby increasing the compliance value of the rear sound cavity of the speaker module 10 and improving the low-frequency performance of the speaker module 10. In addition, the structures of the follower 3 and the magnetic assembly 4 are relatively simple and reasonable; at the same time, the rear sound cavity of the speaker module 10 is formed by using the housing 20 of the electronic device 100, which is also conducive to reducing the volume of the speaker module 10 and facilitating the miniaturization design of the speaker module 10.

[0207] See also Fig.10 , Fig.10 1 is a schematic diagram of the internal structure of another electronic device 100 provided in an embodiment of the present application. Fig.10 The electronic device 100 shown in the embodiment may include Fig. 9 Most of the technical features of the electronic device 100 shown in the embodiment are mainly described below. The differences between the two are explained below, and most of the common technical contents between the two are not repeated here. Fig.10 The electronic device 100 in the illustrated embodiment is described by taking a mobile phone as an example.

[0208] Fig.10 The electronic device 100 shown in the embodiment is Fig. 9 The difference between the electronic device 100 shown in the embodiment mainly lies in the arrangement of the magnetic component 4. In some embodiments, the electronic device 100 includes a housing 20 and a speaker module 10, and the speaker module 10 is installed inside the housing 20.

[0209] Exemplarily, the speaker module 10 may include a housing 1, a sound unit 2, a follower 3 and a magnetic assembly 4, the sound unit 2 and the follower 3 are fixed to the housing 1 at intervals, the follower 3, the sound unit 2 and the housing 1 form a first cavity 5, and the side of the follower 3 facing away from the first cavity 5 forms a second cavity 6.

[0210] The structure and connection relationship of the housing 20, the shell 1, the sound unit 2 and the driven member 3 can be referred to Fig.10 The related schemes of the embodiment will not be described in detail in this embodiment.

[0211] The magnetic assembly 4 includes a first magnetic member 44 and a second magnetic member 45. The related structures of the first magnetic member 44 and the second magnetic member 45 can be referred to. Figure 7 The relevant description of the embodiment will not be repeated in this embodiment.

[0212] In the initial position, the component of the magnetic repulsion force of the first magnetic member 44 and the second magnetic member 45 in the first direction of the follower 3 is 0, and the air pressures of the first cavity 5 and the second cavity 6 are equal. At this time, the follower 3 will not move, and the follower 3 is in a balanced state. When the diaphragm 21 of the speaker module 10 starts to vibrate, such as vibrating to the right, the air pressure in the first cavity 5 rises and is greater than the air pressure in the second cavity 6. The pressure difference pushes the follower 3 to deviate from the initial position and move to the right. At this time, the second magnetic member 45 deviates from the initial position and moves to the right. The magnetic repulsion force between the first magnetic member 44 and the second magnetic member 45 generates a force component in the direction of movement of the follower 3 (that is, the first direction), thereby pushing the follower 3 to move to the right. The magnetic force of the first magnetic member 44 and the second magnetic member 45 is equivalent to an elastic force, which drives the follower 3 to move in a direction away from the initial position. The greater the displacement, the greater the elastic force.

[0213] It is understandable that within the deformation range or movement range of the follower 3, the magnetic force of the first magnetic member 44 and the second magnetic member 45 is greater than the deformation force of the follower 3, so that the follower 3 moves away from the initial position. This also makes the rear sound cavity of the speaker easier to be compressed or stretched, thereby increasing the compliance of the rear sound cavity of the speaker module 10.

[0214] In this embodiment, by providing the follower 3 and the magnetic assembly 4, the follower 3 in the speaker module 10 has a tendency to deviate from the initial position when driven by force, thereby increasing the compliance value of the rear sound cavity of the speaker module 10 and improving the low-frequency performance of the speaker module 10. In addition, the structures of the follower 3 and the magnetic assembly 4 are relatively simple and reasonable; at the same time, the rear sound cavity of the speaker module 10 is formed by using the housing 20 of the electronic device 100, which is also conducive to reducing the volume of the speaker module 10 and facilitating the miniaturization design of the speaker module 10.

[0215] It should be noted that, in the absence of conflict, the embodiments and 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. In other words, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0216] 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.

[0217] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed in the present application can easily think of changes or substitutions, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A speaker module, characterized in that: include: shell; A sound unit is installed on the housing and forms a rear sound cavity with the housing; A follower is fixed to the inner side of the housing and divides the rear sound cavity into a first cavity and a second cavity which are not connected to each other, and at least a part of the structure of the follower can be deformed along a first direction; as well as A magnetic component is located in the first cavity or the second cavity, and the magnetic component includes a first magnetic component, a second magnetic component and a third magnetic component. The first magnetic component and the second magnetic component are fixed to the housing and arranged at intervals along the first direction. The third magnetic component is fixed to the follower, and the third magnetic component is located between the first magnetic component and the second magnetic component. There is magnetic attraction between the third magnetic component and the first magnetic component, and between the third magnetic component and the second magnetic component.

2. The speaker module according to claim 1, characterized in that: The first magnetic attraction member and the second magnetic attraction member are magnetic members, and the third magnetic attraction member is a magnetic conductive member; Alternatively, the third magnetic attraction member is a magnetic member, and the first magnetic attraction member and the second magnetic attraction member are magnetic conductive members; Alternatively, the first magnetic member, the second magnetic member and the third magnetic member are all magnetic members, and in the first direction, the magnetism of the magnetic poles of the first magnetic member and the third magnetic member that are close to each other is opposite, and the magnetism of the magnetic poles of the second magnetic member and the third magnetic member that are close to each other is opposite.

3. The speaker module according to claim 1, characterized in that: In the first direction, the projections of the third magnetic component do not overlap with the projections of the first magnetic component and the second magnetic component.

4. A speaker module, characterized in that: include: shell; A sound unit is installed on the housing and forms a rear sound cavity with the housing; A follower is fixed to the inner side of the housing and divides the rear sound cavity into a first cavity and a second cavity which are not connected to each other, and at least a part of the structure of the follower can be deformed along a first direction; as well as A magnetic component is located in the first cavity or the second cavity, and the magnetic component includes a first magnetic component and a second magnetic component. The first magnetic component is fixed to the inner side of the shell, and the second magnetic component is fixed to the driven component. The first magnetic component and the second magnetic component are arranged along a second direction, and the magnetism of the relative poles of the first magnetic component and the second magnetic component is the same, and the second direction is perpendicular to the first direction.

5. The loudspeaker module according to any one of claims 1 to 4, characterized in that: The housing has a fixing portion, the fixing portion surrounds the follower, and the edge of the follower is sealed and fixed to the fixing portion; The follower is an integrated structural member, the follower is a flexible member or an elastic member, and the rigidity of the follower is smaller than the rigidity of the fixing portion.

6. The loudspeaker module according to any one of claims 1 to 4, characterized in that: The follower includes a follower portion and a deformation portion, wherein the deformation portion surrounds the follower portion, the deformation portion connects the follower portion and the housing, the rigidity of the deformation portion is smaller than the rigidity of the follower portion, and the deformation portion is deformable.

7. The loudspeaker module according to any one of claims 1 to 4, characterized in that: The magnetic components include multiple groups, and the multiple groups of magnetic components are arranged along the circumferential direction of the driven member.

8. The loudspeaker module according to any one of claims 1 to 4, characterized in that: The sound generating unit has a diaphragm, and the first direction is parallel to a vibration direction of the diaphragm.

9. The loudspeaker module according to any one of claims 1 to 4, characterized in that: When the follower deforms and moves away from the initial position, the force of the magnetic component on the follower is greater than the deformation restoring force of the follower.

10. An electronic device, characterized in that: It comprises a shell and a speaker module as claimed in any one of claims 1 to 9; the speaker module is installed on the inner side of the shell.

11. An electronic device, characterized in that: It comprises a housing and a speaker module, wherein the speaker module is installed on the inner side of the housing; The speaker module comprises a housing, a sound unit, a follower and a magnetic assembly, wherein the sound unit and the follower are fixed to the housing at intervals, the follower, the sound unit and the housing form a first cavity, a side of the follower facing away from the first cavity forms a second cavity, and at least a part of the structure of the follower can be deformed along a first direction; The magnetic component is located in the first cavity or the second cavity, and the magnetic component includes a first magnetic component, a second magnetic component and a third magnetic component. The first magnetic component and the second magnetic component are fixed to the housing and arranged at intervals along the first direction. The third magnetic component is fixed to the follower, and the third magnetic component is located between the first magnetic component and the second magnetic component. There is magnetic attraction between the third magnetic component and the first magnetic component, and between the third magnetic component and the second magnetic component.

12. The electronic device according to claim 11, characterized in that: The first magnetic attraction member and the second magnetic attraction member are magnetic members, and the third magnetic attraction member is a magnetic conductive member; Alternatively, the third magnetic attraction member is a magnetic member, and the first magnetic attraction member and the second magnetic attraction member are magnetic conductive members; Alternatively, the first magnetic member, the second magnetic member and the third magnetic member are all magnetic members, and in the first direction, the magnetism of the magnetic poles of the first magnetic member and the third magnetic member that are close to each other is opposite, and the magnetism of the magnetic poles of the second magnetic member and the third magnetic member that are close to each other is opposite.

13. The electronic device according to claim 11, characterized in that: In the first direction, the projections of the third magnetic component do not overlap with those of the first magnetic component and the second magnetic component.

14. An electronic device, characterized in that: It comprises a housing and a speaker module, wherein the speaker module is installed on the inner side of the housing; The speaker module comprises a housing, a sound unit, a follower and a magnetic assembly, wherein the sound unit and the follower are fixed to the housing at intervals, the follower, the sound unit and the housing form a first cavity, a side of the follower facing away from the first cavity forms a second cavity, and at least a part of the structure of the follower can be deformed along a first direction; The magnetic component is located in the first cavity or the second cavity, and the magnetic component includes a first magnetic part and a second magnetic part. The first magnetic part is fixed to the inner side of the shell, and the second magnetic part is fixed to the driven part. The first magnetic part and the second magnetic part are arranged along a second direction, and the magnetic poles of the first magnetic part and the second magnetic part are arranged opposite to each other and have the same magnetic properties, and the second direction is perpendicular to the first direction.

15. The electronic device according to claim 11 or 14, characterized in that: The housing has a fixing portion, the fixing portion surrounds the follower, and the edge of the follower is sealed and fixed to the fixing portion; The follower is an integrated structural member, the follower is a flexible member or an elastic member, and the rigidity of the follower is smaller than the rigidity of the fixing portion.

16. The electronic device according to claim 11 or 14, characterized in that: The follower includes a follower portion and a deformation portion, wherein the deformation portion surrounds the follower portion, the deformation portion connects the follower portion and the housing, the rigidity of the deformation portion is smaller than the rigidity of the follower portion, and the deformation portion is deformable.

17. The electronic device according to claim 11 or 14, characterized in that: The magnetic components include multiple groups, and the multiple groups of magnetic components are arranged along the circumferential direction of the driven member.

18. The electronic device according to claim 11 or 14, characterized in that: The sound generating unit has a diaphragm, and the first direction is parallel to a vibration direction of the diaphragm.

19. The electronic device according to claim 11 or 14, characterized in that: When the follower deforms and moves away from the initial position, the force of the magnetic component on the follower is greater than the deformation restoring force of the follower.

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