Loudspeaker core, loudspeaker module and electronic equipment

Abstract

The embodiment of the invention provides a loudspeaker core, a loudspeaker module and electronic equipment, relates to the technical field of electronic equipment, is beneficial to the light and thin design of the electronic equipment, has few components, reduces the processing procedures of a loudspeaker, and improves the production efficiency of the loudspeaker. The loudspeaker core comprises: a support; the first magnetic structure is fixed on the bracket; the vibration assembly is fixed on the bracket, and the vibration assembly comprises a second magnetic structure; when the signal received by the first magnetic structure and / or the second magnetic structure is a first signal, the first magnetic structure and the second magnetic structure attract each other, and the vibration assembly vibrates in a first direction; when the signal received by the first magnetic structure and / or the second magnetic structure is a second signal, the first magnetic structure and the second magnetic structure repel each other, and the vibration assembly vibrates in a second direction; wherein the first direction is opposite to the second direction.

Description

Technical Field

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

[0002] Speakers are used to convert audio electrical signals such as music and voice into sound. They can support the function of external audio playback and are widely used in electronic devices such as mobile phones, tablets, and laptops.

[0003] However, the existing speaker modules have many components, are complex to process, and are heavy and thick, which is contrary to the demand for thinner and lighter electronic devices. Therefore, how to achieve an ultra-thin design of the entire device by reducing the weight and thickness of the speaker is a technical problem that needs to be solved urgently. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a speaker core, a speaker module and an electronic device, which are conducive to the lightweight design of electronic equipment, with fewer components, reduced processing steps of the speaker, and improved production efficiency of the speaker.

[0005] In a first aspect, an embodiment of the present application provides a speaker core, which includes: a bracket; a first magnetic structure fixed on the bracket; a vibration component fixed on the bracket, the vibration component including a second magnetic structure; when the signal received by the first magnetic structure and / or the second magnetic structure is a first signal, the first magnetic structure and the second magnetic structure attract each other, and the vibration component vibrates in a first direction; when the signal received by the first magnetic structure and / or the second magnetic structure is a second signal, the first magnetic structure and the second magnetic structure repel each other, and the vibration component vibrates in a second direction; wherein the first direction is opposite to the second direction.

[0006] The magnetic force between the magnetic structures is used to drive the vibration component to vibrate up and down, so that the vibration component makes a sound. Compared with the related technology that drives the vibration component to vibrate up and down by the Ampere force exerted on the energized coil in the magnetic field, since there is no need to set up a voice coil and a magnetic circuit system, the speaker core structure provided in the embodiment of the present application is simpler, with fewer components, fewer processing steps, and high production efficiency. It can also provide more rear cavity air volume, which helps to improve the low-frequency performance of the speaker. It is also light in weight and thin in thickness, which is conducive to the lightweight design of electronic equipment. It also eliminates the problem of voice coil rubbing (i.e., the phenomenon that the voice coil collides with the magnets around it) and reduces the heat generation.

[0007] Exemplarily, the first direction is the -Z axis direction in the embodiment, and the second direction is the +Z axis direction in the embodiment; or, the first direction is the +Z axis direction in the embodiment, and the second direction is the -Z axis direction in the embodiment.

[0008] Exemplarily, when the signal received by the first magnetic structure and / or the second magnetic structure is a first signal, an attractive force is generated between the first magnetic structure and the second magnetic structure, so that the first magnetic structure and the second magnetic structure attract each other, and the vibration component vibrates in the first direction; when the signal received by the first magnetic structure and / or the second magnetic structure is a second signal, a repulsive force is generated between the first magnetic structure and the second magnetic structure, the first magnetic structure and the second magnetic structure repel each other, and the vibration component vibrates in the second direction.

[0009] In some possible implementations, the vibration assembly further includes a diaphragm and a dome, the diaphragm is annular and arranged around the periphery of the dome, and the vibration assembly is fixed to the bracket through the diaphragm; the second magnetic structure includes at least one magnetic unit, and at least one magnetic unit is fixed to the dome; when the signal received by the first magnetic structure and / or the magnetic unit is a first signal, the first magnetic structure and the second magnetic structure attract each other, and the vibration assembly vibrates in the first direction; when the signal received by the first magnetic structure and / or the magnetic unit is a second signal, the first magnetic structure and the second magnetic structure repel each other, and the vibration assembly vibrates in the second direction. That is, the magnetic unit drives the diaphragm and the dome to vibrate up and down, thereby achieving sound generation.

[0010] Exemplarily, the magnetic unit is fixed to the top of the ball by bonding (such as glue), etc. Of course, the way of fixing the magnetic unit to the top of the ball is not limited to this, as long as the magnetic unit can be fixed to the top of the ball.

[0011] In some possible implementations, based on the second magnetic structure including at least one magnetic unit, the number of magnetic units is multiple, and the projections of the multiple magnetic units on the reference plane are circumferentially arranged along the projection of the center of the first magnetic structure on the reference plane, and are symmetrically distributed; the reference plane is perpendicular to the first direction.

[0012] This setting ensures the balance of vibration between the diaphragm and the dome, which is beneficial to improving the acoustic performance of the speaker.

[0013] Exemplarily, the reference plane is a plane formed by the X-axis and the Y-axis in the embodiment.

[0014] In some possible implementations, the vibration assembly further includes a diaphragm and a dome, at least one magnetic unit is fixed on the dome, and the first magnetic structure includes at least one electromagnetic induction coil, and the magnetic unit includes a magnet. That is, the electromagnetic induction coil and the magnet replace the existing magnetic circuit system and voice coil, avoiding voice coil rubbing and polarization, reducing heat generation, and having a simpler structure, light weight, and thin thickness.

[0015] Exemplarily, when a current in a certain direction is passed through the electromagnetic induction coil, the iron core in the electromagnetic induction coil becomes a magnet. According to the right-hand screw rule, the magnet, for example, has an N pole on the top and an S pole on the bottom, while the magnet on the top of the ball, for example, has an N pole on the top and an S pole on the bottom. This makes the upper and lower magnets produce an attractive force, and the magnet on the top of the ball drives the diaphragm to move downward (i.e., the -Z direction in the embodiment); when a current in another direction is passed through the electromagnetic induction coil, the iron core in the electromagnetic induction coil becomes a magnet. According to the right-hand screw rule, the magnet, for example, has an S pole on the top and an N pole on the bottom, while the magnet on the top of the ball, for example, has an N pole on the top and an S pole on the bottom. This makes the upper and lower magnets produce a repulsive force, and the magnet on the top of the ball drives the diaphragm to move upward. By constantly changing the direction and magnitude of the current in the electromagnetic induction coil, the magnetism of the iron core constantly changes, and the magnitude and direction of the magnetic force between the iron core and the magnet also constantly change, thereby driving the diaphragm to move up and down and generating different amplitudes.

[0016] In some possible implementations, the vibration assembly further includes a diaphragm and a dome, at least one magnetic unit is fixed on the dome, the first magnetic structure includes at least one electromagnetic induction coil, and the magnetic unit includes an electromagnetic induction coil. That is, two electromagnetic induction coils replace the existing magnetic circuit system and voice coil, avoiding voice coil rubbing and polarization, reducing heat generation, and having a simpler structure, light weight, and thin thickness. In addition, the amplitude of the speaker can be increased or the vibration amplitude of the diaphragm can be better controlled.

[0017] Exemplarily, when a current in a certain direction is passed through the two electromagnetic induction coils, the iron cores in the two electromagnetic induction coils become magnets. According to the right-hand screw rule, the two magnets are, for example, N poles on the top and S poles on the bottom, so that the upper and lower magnets generate attraction, and the electromagnetic induction coil on the top of the ball drives the diaphragm to move downward (i.e., -Z direction in the embodiment); when currents in different directions are passed through the two electromagnetic induction coils, the iron cores in the two electromagnetic induction coils become magnets. According to the right-hand screw rule, one of the magnets is, for example, S poles on the top and N poles on the bottom, and the other magnet is, for example, N poles on the top and S poles on the bottom, so that the upper and lower magnets generate repulsion, and the electromagnetic induction coil on the top of the ball drives the diaphragm to move upward. By constantly changing the direction and magnitude of the current in the electromagnetic induction coil, the magnetism of the iron core is constantly changing, and the magnitude and direction of the magnetic force between the iron core and the magnet are also constantly changing, thereby driving the diaphragm to move up and down and generating different amplitudes.

[0018] In some possible implementations, based on the arrangement of a magnet or an electromagnetic induction coil on the spherical top, along a first direction, the spherical top includes a first surface and a second surface opposite to each other, at least one magnetic unit is fixed on the first surface, and the first magnetic structure is located on the side of the second surface facing away from the first surface.

[0019] This arrangement allows the magnet or electromagnetic induction coil disposed on the dome to have more space to vibrate downward, which is beneficial to the vibration of the diaphragm, or the distance between the dome and the first magnetic structure can be reduced, which is beneficial to the lightweight design of the electronic device.

[0020] In some possible implementations, the vibration assembly further includes a diaphragm and a dome, at least one magnetic unit is fixed on the dome, the first magnetic structure includes at least one electromagnetic induction coil, the magnetic unit includes a magnetostrictive unit, one end of the magnetostrictive unit is fixed on the dome, and the other end of the magnetostrictive unit is fixed on the electromagnetic induction coil. Exemplarily, under the action of the alternating magnetic field of the electromagnetic induction coil, the magnetostrictive unit responds to the magnetic field by changing its own shape, that is, the magnetostrictive unit can be extended or shortened, thereby driving the diaphragm to vibrate up and down. That is, the electromagnetic induction coil and the magnetostrictive unit replace the existing magnetic circuit system and voice coil, avoiding voice coil rubbing and polarization, reducing heat generation, and having a simpler structure, light weight, and thin thickness.

[0021] In some possible implementations, on the basis that the above-mentioned magnetic unit includes a magnetostrictive unit, the material of the magnetostrictive unit includes terbium-dysprosium-iron alloy, terbium-dysprosium-iron alloy or iron-gallium alloy, etc. Of course, the material of the magnetostrictive unit is not limited to this. As long as the material can be extended or shortened under the action of an alternating magnetic field, thereby driving the diaphragm to vibrate up and down, it is within the protection scope of the present application.

[0022] In some possible implementations, the second magnetic structure includes a soft magnet; the vibration component also includes a diaphragm, which is annular and arranged around the periphery of the soft magnet, and the vibration component is fixed to the bracket through the diaphragm. That is, the soft magnet is reused as a ball top, that is, the soft magnet has the function of a ball top and also has the function of driving the diaphragm to vibrate.

[0023] In some possible implementations, based on the second magnetic structure comprising a soft magnet, the soft magnet includes Permalloy or a soft magnetic alloy (such as J22 soft magnetic alloy, etc.).

[0024] In some possible implementations, the bracket includes a bearing portion and a fixed portion, the fixed portion is an annular structure, and along a first direction, the fixed portion includes a first end and a second end, the fixed portion is fixed to the periphery of the bearing portion through the first end, and the second end is located on the side of the first end away from the bearing portion; the bearing portion and the fixed portion are surrounded to form a cavity, the first magnetic structure is fixed on the bearing portion and is located in the cavity, and the vibration component is fixed on the second end of the fixed portion to fix the vibration component to the bracket.

[0025] This arrangement makes the speaker structures more compact and smaller in size.

[0026] In some possible implementations, based on the above-mentioned bracket including a bearing part and a fixing part, the bearing part and the fixing part are integrally formed, so that the process steps can be simplified. Of course, the bearing part and the fixing part can also be formed separately and then fixed together by bonding or welding.

[0027] In some possible implementations, when the first magnetic structure includes at least one electromagnetic induction coil, a wiring hole is opened on the bearing portion and / or the fixing portion, and the end of the electromagnetic induction coil extends through the wiring hole to receive the first signal or the second signal, thereby facilitating the electromagnetic induction coil to receive the signal.

[0028] In a second aspect, an embodiment of the present application provides a speaker module, which includes a shell and a core, and the core is the speaker core described in the first aspect; the speaker core is located in the shell, and divides the accommodating cavity in the shell into a front cavity and a rear cavity.

[0029] The second aspect and any implementation of the second aspect correspond to the first aspect and any implementation of the first aspect respectively. The technical effects corresponding to the second aspect and any implementation of the second aspect can refer to the technical effects corresponding to the above-mentioned first aspect and any implementation of the first aspect, which will not be repeated here.

[0030] In a third aspect, an embodiment of the present application provides an electronic device, which includes a speaker module, the speaker module includes a core, and the core is the speaker core described in the first aspect; the speaker module has a containing cavity, and the speaker core divides the containing cavity into a front cavity and a rear cavity.

[0031] The third aspect and any implementation of the third aspect correspond to the first aspect and any implementation of the first aspect, respectively. The technical effects corresponding to the third aspect and any implementation of the third aspect can refer to the technical effects corresponding to the first aspect and any implementation of the first aspect, which will not be repeated here.

[0032] Exemplarily, the speaker module can be an open speaker module. When the speaker module is an open speaker module, the whole machine cavity is reused as the containing cavity of the speaker module; the speaker module can be a sealed speaker module. When the speaker module is a sealed speaker module, the speaker module includes an outer shell, and the outer shell has a containing cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0034] Figure 2 for Figure 1 an exploded view of the electronic device shown;

[0035] Figure 3 A schematic diagram of the structure of a speaker module provided in an embodiment of the present application;

[0036] Figure 4 for Figure 3 A cross-sectional view of the loudspeaker module along the AA' direction;

[0037] Figure 5 A film layer diagram of a core in the related art;

[0038] Figure 6 A schematic diagram of the structure of a kernel provided in an embodiment of the present application;

[0039] Figure 7 for Figure 6 Exploded view of the kernel shown;

[0040] Figure 8 for Figure 6 The cross-section of the core shown is along the BB' direction;

[0041] Fig. 9 A schematic diagram of the principle of generating magnetic force between the electromagnetic induction coil and the magnet provided in the embodiment of the present application;

[0042] Fig.10 A state diagram of a speaker kernel provided in an embodiment of the present application;

[0043] Fig.11 Another state diagram of the speaker core provided by the embodiment of the present application;

[0044] Fig.12 A film layer diagram of a speaker core according to an embodiment of the present application;

[0045] Fig.13 A film layer diagram of another speaker core according to an embodiment of the present application;

[0046] Fig.14 This is a membrane layer diagram of another speaker core according to an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0049] The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different target objects rather than to describe a specific order of target objects.

[0050] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0051] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more than two. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0052] The embodiment of the present application provides an electronic device, and the electronic device provided in the embodiment of the present application can be a mobile phone, a tablet computer, a laptop computer, a personal digital assistant (PDA for short), a car computer, a car speaker, a smart speaker, a TV, a smart screen, a smart wearable device (such as a smart watch, a smart bracelet, a smart head-mounted display, smart glasses), a smart home device, etc., which includes a speaker module. The embodiment of the present application does not specifically limit the specific form of the above electronic device. For the convenience of explanation, the following description is taken as an example of the electronic device being a mobile phone.

[0053] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application, Figure 2 for Figure 1 An exploded view of the electronic device shown. Figure 1 and Figure 2 As shown, the mobile phone 100 includes a display module 10, a back cover (also called a battery cover) 20, a middle frame 30, a main board 40, a sub-board 50, a flexible printed circuit (Flexible Printed Circuit, FPC) 60 connecting the main board 40 and the sub-board 50, a battery 70 and at least one speaker module 80 and other structures.

[0054] Understandably, Figure 1 and Figure 2 The following figures and the related drawings only schematically illustrate some components of the mobile phone 100, and the actual shapes, sizes, positions and structures of these components are not subject to Figure 1 and Figure 2 In addition, when the electronic device is a device of some other form, the electronic device 100 may not include at least one of the display module 10, the back cover 20, the middle frame 30, the sub-board 50, the FPC 60, the battery 70, etc.

[0055] Figure 1 and Figure 2 In the figure, the mobile phone 100 is in the shape of a rectangular flat plate. In order to facilitate the clear description of the subsequent structural features and the positional relationship of the structural features, the positional relationship of the various structures in the mobile phone is specified in the X-axis direction, the Y-axis direction and the Z-axis direction, wherein the X-axis direction is the width direction of the mobile phone, the Y-axis direction is the length direction of the mobile phone, and the Z-axis direction is the thickness direction of the mobile phone. It can be understood that the coordinate system (i.e., the X-axis, Y-axis and Z-axis) of the electronic device can be flexibly set according to actual needs, and no specific limitation is made here. In other optional embodiments, the shape of the electronic device can also be a square flat plate, a circular flat plate, an elliptical flat plate, etc. Of course, the electronic device can also be a foldable electronic device, etc.

[0056] The display module 10 includes a cover plate 11 and a display screen 12 stacked along the Z-axis direction. The cover plate 11, for example, protects the display screen 12. The display screen 12, for example, includes a liquid crystal display (LCD), an organic light emitting diode (OLED) display screen, and an LED display screen, among which the LED display screen includes, for example, a Micro-LED display screen, a Mini-LED display screen, etc. The embodiment of the present application does not limit the type of the display screen 12.

[0057] Along the Z-axis direction, the back cover 20 is located on the side of the display screen 12 away from the cover plate 11, wherein the material of the back cover 20 may include, for example, opaque materials such as plastic, plain leather, and glass fiber; or may include translucent materials such as glass. The material of the back cover 20 is not limited in the embodiment of the present application.

[0058] The middle frame 30 is located between the cover plate 11 and the back cover 20. The cover plate 11, the middle frame 30 and the back cover 20 can enclose a whole machine cavity. The display screen 12, the main board 40, the sub-board 50, the FPC 60, the battery 70, the speaker module 80 and other structures are located in the whole machine cavity.

[0059] A control chip is integrated on the mainboard 40. The control chip includes, for example, a system on chip (SoC) and an application processor (AP). Among them, the SoC integrates, for example, a central processing unit (CPU), a graphic processing unit (GPU), and a modem.

[0060] The sub-board 50 integrates an antenna radio frequency front end, a Universal Serial Bus (USB) device, and the like.

[0061] The FPC 60 is used to electrically connect the main board 40 and the sub-board 50 to achieve data and signal transmission between the main board 40 and the sub-board 50 .

[0062] The battery 70 is located between the main board 40 and the sub-board 50, and is used to supply power to the mobile phone 100, such as the display screen 12, devices on the main board 40, devices on the sub-board 50, and the speaker module 80, to ensure normal operation.

[0063] The speaker module 80 is used to convert audio signals such as music and voice into sound, and can support the function of external audio. Along the Y-axis direction, the speaker module 80 is located on the side of the battery 70 away from the main board 40, that is, it is arranged adjacent to the sub-board 50 and is electrically connected to the sub-board 50. In this case, the audio signal sent by the main board 40 is transmitted to the speaker module 80 via the FPC 60 and the sub-board 50, and is converted into sound output by the speaker module 80. Specifically, the speaker module 80 has a sound outlet channel 81, and accordingly, a sound outlet hole 31 is opened on the middle frame 30, which is connected to the sound outlet channel 81. After the sound converted by the speaker module 80 is output by the sound outlet channel 81, it is further output to the outside of the mobile phone 100 by the sound outlet hole 31.

[0064] It should be noted that Figure 1 and Figure 2 The description is made by taking the case where the number of speaker modules 80 is one and the speaker module 80 is located on the side of the battery 70 away from the main board 40 as an example. In other optional embodiments of the present application, the speaker module 80 may also be arranged adjacent to the main board 40 and electrically connected to the main board 40. In this case, the main board 40 sends the audio signal to the speaker module 80 electrically connected thereto, and the audio signal is converted into sound output by the speaker module 80; or, the number of speaker modules 80 is greater than or equal to two, at least one speaker module 80 is arranged adjacent to the sub-board 50 and electrically connected to the sub-board 50, and at least one speaker module 80 is arranged adjacent to the main board 40 and electrically connected to the main board 40.

[0065] See also Figure 3 and Figure 4 , Figure 3 A schematic diagram of the structure of a speaker module provided in an embodiment of the present application is shown in FIG. Figure 4 for Figure 3 The cross-sectional view of the speaker module along the AA' direction is shown. Figure 3 and Figure 4 As shown, the speaker module 80 includes a shell 82 and a core (also referred to as a speaker core) 83. The shell 82 may be an independent shell structure (in which case the speaker module may be referred to as a sealed speaker module), or may be at least partially surrounded by other components of the electronic device (in which case the speaker module may be referred to as an open speaker module), which is not limited here. Figure 3 and Figure 4 The description is made by taking the shell 82 as an independent shell structure as an example. In this case, the shell 82 includes a front shell 821 and a rear shell 822. Along the Z-axis direction, the front shell 821 is located on the side of the rear shell away from the rear cover 20. The shell 82 is formed by assembling the front shell 821 and the rear shell 822, which is conducive to reducing the molding and assembly difficulties of the shell 82. The front shell 821 and the rear shell 822 surround a housing cavity.

[0066] Continue to see Figure 3 In some embodiments, along the X-axis direction, the rear housing 822 includes a protection portion 8221 and an assembly portion 8222, and along the Z-axis direction, the front housing 821 is opposite to the assembly portion 8222, and the front housing 821 is fixed to the assembly portion 8222, so that the front housing 821 and the assembly portion 8222 surround the accommodating cavity. Since the assembly portion 8222 is not provided on the protection portion 8221, some space can be reserved for arranging other structures in the mobile phone 100, and the protection portion 8221 can protect the components located below it (the side of the protection portion 8221 away from the rear cover 20).

[0067] It should be noted that the front housing 821 and the assembly portion 8222 are relative to each other, that is, the orthographic projection of the front housing 821 on the plane formed by the X-axis and the Y-axis overlaps with the orthographic projection of the assembly portion 8222 on the plane formed by the X-axis and the Y-axis.

[0068] Continue to see Figure 3 In some embodiments, a fixing hole 8223 is provided on the shell 82 (such as the protective portion 8221 ), and the fixing hole 8223 can be cooperated with a screw or the like to fix the speaker module 80 in the entire cavity of the mobile phone 100 .

[0069] The core 83 is a core component for generating sound in the speaker module 80. The core 83 is disposed in the shell 82, and the accommodating cavity of the shell 82 is divided into a front cavity Q1 and a rear cavity Q2, wherein the front cavity Q1 is communicated with the sound outlet channel 81, and a ventilation channel (not shown in the figure) connecting the core 83 and the rear cavity Q2 is provided between the core 83 and the rear cavity Q2 to realize ventilation between the core 83 and the rear cavity Q2. When the core 83 is working, it can promote the air in the front cavity Q1 to vibrate, and the vibrating air in the front cavity Q1 is led out of the sound outlet channel 81 to form sound, and further the sound is led out of the mobile phone 100 through the sound outlet hole 31 communicated with the sound outlet channel 81 to be heard by the user.

[0070] See also Figure 5 , Figure 5 It is a film layer diagram of a core in the related technology. Figure 5 As shown, the speaker core 83 in the related art includes a bracket 831, a magnetic circuit component 832 and a vibration component 833. The bracket 831 is used to support the vibration component 833 and fix the magnetic circuit component 832. The magnetic circuit component 832 is used to drive the vibration component 833 to vibrate and produce sound.

[0071] The magnetic circuit assembly 832 includes a magnetic bowl 8321, a central magnet 8322 and an edge magnet 8323. The magnetic bowl 8321 is fixed on the bracket 831. The central magnet 8322 and the edge magnet 8323 are fixed on the magnetic bowl 8321. The edge magnet 8323 is arranged circumferentially around the central magnet 8322. A magnetic gap 8324 is defined between the central magnet 8322 and the edge magnet 8323.

[0072] The vibration assembly 833 includes a voice coil 8331, a diaphragm 8332 and a dome 8333. The diaphragm 8332 is ring-shaped and is arranged around the periphery of the dome 8333. The diaphragm 8332 is fixed on the bracket 831. One end of the voice coil 8331 is connected to the dome 8333 and is at least partially suspended in the magnetic gap 8324.

[0073] Specifically, a magnetic circuit is formed between the center magnet 8322 and the edge magnet 8323. The voice coil 8331 forms an alternating magnetic field based on the received AC signal. The alternating magnetic field generates an Ampere force in the magnetic gap 8324, pushing the voice coil 8331 to vibrate up and down along the Z-axis direction, thereby pushing the dome 8333 to vibrate. When the dome 8333 vibrates, it pushes the air in the front cavity Q1 to vibrate. The vibrating air in the front cavity Q1 is guided out from the sound outlet channel 81 to form sound, and the sound is further guided out of the mobile phone 100 through the sound outlet hole 31 of the sound outlet channel 81 so that it can be heard by the user. By constraining the magnetic lines of force by the magnetic bowl 8321, the magnetic field strength in the magnetic gap 8324 can be increased, thereby improving the driving strength of the diaphragm group.

[0074] However, after research, it was found that when the existing speaker module is working, due to the effect of the voice coil's own resistance, the voice coil generates a lot of heat, and the heat is not easy to dissipate, which makes it easy for the voice coil to loosen (the voice coil heat is too high, causing the coil of the voice coil to spread out); and at a certain vibration frequency, there is a risk of the voice coil rubbing in the magnetic gap (the voice coil collides with the magnets around it), causing the speaker to produce noise; in addition, the existing speaker module has more components, complex processing, and is heavy and thick, which is contrary to the demand for thin and light electronic equipment.

[0075] Based on this, an embodiment of the present application provides a speaker core, including a first magnetic structure and a second magnetic structure, wherein the magnetic force between the first magnetic structure and the second magnetic structure drives the vibration component to vibrate up and down, so that the vibration component makes a sound. Compared with the related technology that drives the vibration component up and down by the Ampere force exerted on the energized coil in the magnetic field, since the diaphragm is driven to vibrate by the magnetic force between the magnetic structures, there is no need to set up a voice coil and a magnetic circuit system to drive the diaphragm to vibrate. Therefore, the speaker core structure provided by the embodiment of the present application is simpler, with fewer components, fewer processing steps, and high production efficiency, and can provide more back cavity air volume, which helps to improve the low-frequency performance of the speaker; and it is light in weight and thin in thickness, which is conducive to the lightweight design of electronic equipment; and it eliminates the problems of voice coil rubbing and reduces heat generation.

[0076] The structure of the speaker core is introduced in detail below with different examples.

[0077] For an example, see Figure 6 , Figure 7 and Figure 8 , Figure 6 A schematic diagram of the structure of a kernel provided in an embodiment of the present application, Figure 7 for Figure 6 An exploded view of the kernel shown, Figure 8 for Figure 6 The cross-section of the core along the BB' direction is shown in FIG. Figure 6 , Figure 7 and Figure 8 As shown, the core 83 includes a bracket 831 , a vibration component 833 and a first magnetic structure 834 .

[0078] The bracket 831 includes a bearing portion 8311 and a fixing portion 8312. The projection of the bearing portion 8311 on the plane formed by the X-axis and the Y-axis is, for example, circular, rectangular, or runway-shaped, and the fixing portion 8312 is an annular structure. When the projection of the bearing portion 8311 on the plane formed by the X-axis and the Y-axis is, for example, circular, rectangular, or runway-shaped, the projection of the fixing portion 8312 on the plane formed by the X-axis and the Y-axis is, for example, a circular ring structure, a rectangular ring structure, or a runway ring structure, wherein, Figure 6 and Figure 7The description is made by taking as an example that the projection of the bearing portion 8311 on the plane formed by the X-axis and the Y-axis is a circle, and the projection of the fixing portion 8312 on the plane formed by the X-axis and the Y-axis is a circular ring structure.

[0079] Along the Z-axis direction, the fixing portion 8312 includes a first end 83121 and a second end 83122. The annular fixing portion 8312 is fixed to the periphery of the bearing portion 8311 through the first end 83121, and the second end 83122 is located on the side of the first end 83121 away from the bearing portion 8311. The bearing portion 8311 and the fixing portion 8312 surround to form a cavity, and the first magnetic structure 834 is fixed to the bearing portion 8311 by, for example, bonding, and is located in the cavity surrounded by the bearing portion 8311 and the fixing portion 8312.

[0080] It should be noted that the bearing portion 8311 and the fixing portion 8312 of the bracket 831 can be formed as one piece or separately and then fixed together by bonding or welding. When the bearing portion 8311 and the fixing portion 8312 are formed as one piece, the process steps can be simplified. The embodiments of the present application are all described using the example of the bearing portion and the fixing portion being formed as one piece.

[0081] The vibration assembly 833 includes a diaphragm 8332 and a dome 8333. The diaphragm 8332 is annular and has a folded ring, and is arranged around the periphery of the dome 8333. The diaphragm 8332 is fixed to the second end 83122 of the fixing portion 8312 through its edge. The diaphragm 8332 includes, for example, a paper diaphragm, a wooden diaphragm, a plastic diaphragm, a metal diaphragm, or a biological diaphragm. The material of the dome 8333 includes, for example, but is not limited to, aluminum alloy or magnesium alloy. In order to ensure the consistency of the up and down vibration of the diaphragm 8332, the structure of the dome 8333 can also be changed, such as providing a groove on the dome 8333.

[0082] The vibration assembly 833 also includes a second magnetic structure 8333, which is fixed to the ball top 8333 by bonding or the like. Optionally, along the Z-axis direction, the ball top 8333 includes a first surface 83331 and a second surface 83332, the first surface 83331 is located on a side of the second surface 83332 away from the first magnetic structure 834, and the second magnetic structure 8333 is fixed to the first surface 83331 of the ball top 8333.

[0083] The first magnetic structure 834 includes at least one electromagnetic induction coil, wherein the embodiment of the present application is described by taking the example that the first magnetic structure 834 includes one electromagnetic induction coil.

[0084] The electromagnetic induction coil is a structure formed by a coil that can be energized and is wound around an iron core. There are no restrictions on the cross-sectional shape and number of turns of the coil wound around the iron core, and they can be adjusted according to actual conditions. The embodiment of the present application is explained using the example of a coil with a circular cross-sectional shape and four turns around the iron core.

[0085] In order to facilitate the electromagnetic induction coil to receive signals, for example, a wiring hole can be opened on the bearing portion 8311 or the fixing portion 8312 of the bracket 831, and the end of the electromagnetic induction coil extends through the wiring hole to receive signals.

[0086] The second magnetic structure 8333 includes at least one magnetic unit 83331. When there are multiple magnetic units 83331, the projections of the multiple magnetic units 83331 on the plane formed by the X-axis and the Y-axis are arranged circumferentially along the projection of the center of the electromagnetic induction coil on the plane formed by the X-axis and the Y-axis, and are symmetrically distributed to ensure the balance of the vibration of the diaphragm 8332 and the dome 8331, which is beneficial to improving the acoustic performance of the speaker. Among them, the embodiment of the present application is described by taking the second magnetic structure 8333 including four magnetic units 83331 as an example.

[0087] The magnetic unit 83331 includes, for example, magnets. Four magnets are bonded to the first surface 83331 of the ball top 8333, and the polarity directions of the four magnets are the same, for example, the four magnets are upper N poles (the end facing away from the first surface 83331 of the ball top 8333) and lower S poles (the end in contact with the first surface 83331 of the ball top 8333). In this embodiment of the application, the shape of the magnet includes a cylindrical shape as an example for description.

[0088] For details, see Fig. 9 , Fig. 9 The schematic diagram of the magnetic force generated between the electromagnetic induction coil and the magnet provided in the embodiment of the present application is as follows: Fig. 9 As shown in (1), when a current in a certain direction flows through the electromagnetic induction coil (i.e., the electromagnetic induction coil receives a first signal), the iron core in the electromagnetic induction coil becomes a magnet. Fig. 9 (1) The "+" in the coil represents the direction of the current perpendicular to the screen and outward, and the "-" in the coil represents the direction of the current perpendicular to the screen and inward. According to the right-hand screw rule, the upper end of the magnet (the end away from the fixed part 8312) is the N pole, and the lower end (the end in contact with the fixed part 8312) is the S pole. The upper and lower magnets generate an attractive force, and the upper magnet drives the diaphragm 8332 to move downward. Fig.10 As shown. Fig. 9As shown in (2), when a current in another direction flows through the electromagnetic induction coil (i.e., the electromagnetic induction coil receives the second signal), the iron core in the electromagnetic induction coil becomes a magnet. According to the right-hand screw rule, the upper end of the magnet (the end away from the fixed part 8312) is the S pole, and the lower end (the end in contact with the fixed part 8312) is the N pole. The upper and lower magnets generate a repulsive force, and the upper magnet drives the diaphragm 8332 to move upward, as shown in FIG. Fig.11 By continuously changing the direction of the current in the electromagnetic induction coil, the vibration direction of the diaphragm 8332 can be controlled, and by changing the magnitude of the current in the electromagnetic induction coil, the vibration amplitude of the diaphragm 8332 can be controlled.

[0089] That is to say, the magnetic force between the electromagnetic induction coil and the magnet drives the vibration component to vibrate up and down, so that the vibration component makes a sound. Compared with the related technology that drives the vibration component to vibrate up and down by the Ampere force exerted on the energized coil in the magnetic field, since there is no need to set up a voice coil and a magnetic circuit system, etc., the speaker core structure provided in the embodiment of the present application is simpler, with fewer components, fewer processing steps, and high production efficiency. It can also provide more rear cavity air volume, which helps to improve the low-frequency performance of the speaker; it is also light in weight and thin in thickness, which is conducive to the lightweight design of electronic equipment; it eliminates the problem of voice coil rubbing (that is, the phenomenon of the voice coil colliding with the magnets around it) and reduces the heat generation and other problems.

[0090] For another example, see Fig.12 , Fig.12 This is a film layer diagram of a speaker core in an embodiment of the present application. Fig.12 As shown, different from the above example, the magnetic unit 83331 includes an electromagnetic induction coil, that is, the electromagnetic induction coil replaces the magnet in the above example.

[0091] Specifically, when an electric current in a certain direction flows through the two electromagnetic induction coils (i.e., the electromagnetic induction coils receive the first signal), the iron cores in the two electromagnetic induction coils become magnets. According to the right-hand screw rule, the two magnets, for example, have an N pole on the top and an S pole on the bottom. This makes the upper and lower magnets generate an attractive force, and the electromagnetic induction coil on the ball top 8333 drives the diaphragm 8332 to move downward. When a current in one direction is passed through one of the electromagnetic induction coils (i.e., the electromagnetic induction coil receives the first signal), and a current in another direction is passed through the other electromagnetic induction coil, the iron cores in the two electromagnetic induction coils become magnets. According to the right-hand screw rule, the magnet on the fixed portion 8311, for example, has an S pole at the top (the end away from the fixed portion 8311) and an N pole at the bottom (the end in contact with the fixed portion 8311), and the magnet on the ball top 8333, for example, has an N pole at the top (the end away from the ball top 8333) and an S pole at the bottom (the end in contact with the ball top 8333). This causes the upper and lower magnets to generate a repulsive force, and the electromagnetic induction coil on the ball top 8333 drives the diaphragm 8332 to move upward. By continuously changing the direction of the current in the electromagnetic induction coil, the vibration direction of the diaphragm 8332 can be controlled, and the amplitude of the vibration of the diaphragm 8332 can be controlled by changing the magnitude of the current in the electromagnetic induction coil.

[0092] That is to say, the vibration component is driven to vibrate up and down by the magnetic force between the two sets of electromagnetic induction coils to make the vibration component make a sound. Compared with the related art that the vibration component is driven to vibrate up and down by the Ampere force exerted on the energized coil in the magnetic field, since there is no need to set up a voice coil and a magnetic circuit system, the speaker core structure provided by the embodiment of the present application is simpler, with fewer components, fewer processing steps, and high production efficiency. In addition, it can provide more rear cavity air volume, which helps to improve the low-frequency performance of the speaker; and it is light in weight and thin in thickness, which is conducive to the lightweight design of electronic equipment; and it eliminates the problem of voice coil rubbing (i.e., the phenomenon that the voice coil collides with the magnets around it) and reduces the problem of heat generation. In addition, when the vibration component is driven to vibrate up and down by the magnetic force between the two sets of electromagnetic induction coils, the amplitude of the speaker can be increased or the vibration amplitude of the diaphragm can be better controlled.

[0093] For another example, see Fig.13 , Fig.13 FIG. 1 is a membrane layer diagram of another speaker core of an embodiment of the present application. Fig.13 As shown, different from the above examples, the magnetic unit 83331 includes a magnetostrictive unit, one end of which is fixed on the ball top 8331, and the other end of which is fixed on the electromagnetic induction coil. That is, the magnetostrictive unit replaces the magnet or electromagnetic induction coil on the ball top 8331 in the above examples.

[0094] Among them, the material of the magnetostrictive unit includes terbium-dysprosium-iron alloy, terbium-dysprosium-iron alloy or iron-gallium alloy, etc. Of course, the material of the magnetostrictive unit is not limited to this. As long as the material can be stretched or shortened under the action of an alternating magnetic field, thereby driving the diaphragm to vibrate up and down, it is within the protection scope of this application.

[0095] Specifically, when a current in a certain direction flows through the electromagnetic induction coil (i.e., the electromagnetic induction coil receives a first signal), the electromagnetic induction coil generates a first alternating magnetic field, and the magnetostrictive unit shortens in response to the first alternating magnetic field, driving the ball top 8331 connected thereto to move downward, thereby driving the diaphragm 8332 to move downward. When a current flows in another direction through the electromagnetic induction coil (i.e., the electromagnetic induction coil receives a second signal), the electromagnetic induction coil generates a second alternating magnetic field, and the magnetostrictive unit lengthens in response to the second alternating magnetic field, driving the ball top 8331 connected thereto to move upward, thereby driving the diaphragm 8332 to move upward. By continuously changing the direction of the current in the electromagnetic induction coil, the direction of vibration of the diaphragm 8332 can be controlled, and the amplitude of vibration of the diaphragm 8332 can be controlled by changing the magnitude of the current in the electromagnetic induction coil.

[0096] That is to say, under the action of the alternating magnetic field of the electromagnetic induction coil, the magnetostrictive unit responds to the magnetic field by changing its own shape, that is, the magnetostrictive unit can stretch or shorten, thereby driving the diaphragm to vibrate up and down. Compared with the related art, the vibration component is driven to vibrate up and down by the Ampere force exerted on the energized coil in the magnetic field. Since there is no need to set up a voice coil and a magnetic circuit system, the speaker core structure provided by the embodiment of the present application is simpler, with fewer components, fewer processing steps, and high production efficiency. In addition, it can provide more rear cavity air volume, which is helpful to improve the low-frequency performance of the speaker; and it is light in weight and thin in thickness, which is conducive to the lightweight design of electronic equipment; and it eliminates the problem of voice coil rubbing (that is, the phenomenon that the voice coil collides with the magnets around it) and reduces the heat generation.

[0097] For another example, see Fig.14 , Fig.14 FIG. 1 is a membrane layer diagram of another speaker core of an embodiment of the present application. Fig.14 As shown, unlike the above examples, the spherical top 8331 is not provided with a magnetic unit, but is provided with a soft magnet, that is, the soft magnet has the function of a spherical top and also has the function of driving the diaphragm to vibrate, that is, the vibration component 833 includes a diaphragm 8332 and a soft magnet 8334, and the diaphragm 8332 is annular and is provided around the periphery of the soft magnet 8334. The soft magnet 8334 is, for example, an upper N pole (the end away from the electromagnetic induction coil) and a lower S pole (the end toward the electromagnetic induction coil).

[0098] Among them, the soft magnet includes Permalloy or soft magnetic alloy (such as J22 soft magnetic alloy, etc.) and the like.

[0099] Specifically, when a current in a certain direction is passed through the electromagnetic induction coil (i.e., the electromagnetic induction coil receives the first signal), the iron core in the electromagnetic induction coil becomes a magnet, the upper end (the end away from the fixed part 8312) of the magnet is the N pole, and the lower end (the end in contact with the fixed part 8312) is the S pole, and the upper and lower magnets generate an attractive force, and the upper magnet drives the diaphragm 8332 to move downward. When a current in another direction is passed through the electromagnetic induction coil (i.e., the electromagnetic induction coil receives the second signal), the iron core in the electromagnetic induction coil becomes a magnet, the upper end (the end away from the fixed part 8312) of the magnet is the S pole, and the lower end (the end in contact with the fixed part 8312) is the N pole, and the upper and lower magnets generate a repulsive force, and the upper magnet drives the diaphragm 8332 to move upward. By continuously changing the direction of the current in the electromagnetic induction coil, the direction of vibration of the diaphragm 8332 can be controlled, and the amplitude of vibration of the diaphragm 8332 can be controlled by changing the magnitude of the current in the electromagnetic induction coil.

[0100] That is to say, the magnetic force between the electromagnetic induction coil and the soft magnet drives the vibration component to vibrate up and down, so that the vibration component makes a sound. Compared with the related art that drives the vibration component to vibrate up and down by the Ampere force exerted on the energized coil in the magnetic field, since there is no need to set up a voice coil and a magnetic circuit system, the speaker core provided by the embodiment of the present application has a simple structure, fewer components, fewer processing steps, high production efficiency, and can provide more back cavity air volume, which helps to improve the low-frequency performance of the speaker; and it is light in weight and thin in thickness, which is conducive to the lightweight design of electronic equipment; and it eliminates the problem of voice coil rubbing (i.e., the phenomenon that the voice coil collides with the magnets around it) and reduces the problem of heat generation. In addition, since the soft magnet has the function of both the dome and the function of driving the diaphragm to vibrate, there is no need to set up a magnetic unit, and the structure is simpler.

[0101] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A speaker core, characterized in that: include: Bracket; A first magnetic structure is fixed on the bracket; A vibration component is fixed on the bracket, and the vibration component includes a second magnetic structure; When the signal received by the first magnetic structure and / or the second magnetic structure is a first signal, the first magnetic structure and the second magnetic structure attract each other, and the vibration component vibrates in a first direction; When the signal received by the first magnetic structure and / or the second magnetic structure is a second signal, the first magnetic structure and the second magnetic structure repel each other, and the vibration component vibrates in a second direction; The first direction is opposite to the second direction.

2. The speaker core according to claim 1, characterized in that: The vibration component further includes a diaphragm and a dome, the diaphragm is annular and is arranged around the periphery of the dome, and the vibration component is fixed to the bracket through the diaphragm; The second magnetic structure includes at least one magnetic unit, and at least one of the magnetic units is fixed on the top of the ball; When the signal received by the first magnetic structure and / or the magnetic unit is a first signal, the first magnetic structure and the second magnetic structure attract each other, and the vibration component vibrates in a first direction; When the signal received by the first magnetic structure and / or the magnetic unit is a second signal, the first magnetic structure and the second magnetic structure repel each other, and the vibration component vibrates in a second direction.

3. The speaker core according to claim 2, characterized in that: There are multiple magnetic units, and projections of the multiple magnetic units on the reference surface are arranged circumferentially along the projection of the center of the first magnetic structure on the reference surface, and are symmetrically distributed; The reference plane is perpendicular to the first direction.

4. The speaker core according to claim 2 or 3, characterized in that: The first magnetic structure includes at least one electromagnetic induction coil, and the magnetic unit includes a magnet.

5. The speaker core according to claim 2 or 3, characterized in that: The first magnetic structure includes at least one electromagnetic induction coil, and the magnetic unit includes an electromagnetic induction coil.

6. The speaker core according to claim 4 or 5, characterized in that: Along the first direction, the dome includes a first surface and a second surface opposite to each other, at least one magnetic unit is fixed on the first surface, and the first magnetic structure is located on a side of the second surface away from the first surface.

7. The speaker core according to claim 2 or 3, characterized in that: The first magnetic structure includes at least one electromagnetic induction coil, the magnetic unit includes a magnetostrictive unit, one end of the magnetostrictive unit is fixed on the top of the ball, and the other end of the magnetostrictive unit is fixed on the electromagnetic induction coil.

8. The speaker core according to claim 7, characterized in that: The material of the magnetostrictive unit includes terbium-dysprosium-iron alloy, terbium-dysprosium-iron alloy or iron-gallium alloy.

9. The speaker core according to claim 1, characterized in that: The second magnetic structure includes a soft magnet; The vibration component also includes a vibration membrane, which is ring-shaped and arranged around the periphery of the soft magnet. The vibration component is fixed on the bracket through the vibration membrane.

10. The speaker core according to claim 9, characterized in that: The soft magnet includes Permalloy or soft magnetic alloy.

11. The speaker core according to any one of claims 1 to 10, characterized in that: The bracket includes a bearing portion and a fixing portion, the fixing portion is an annular structure, and along the first direction, the fixing portion includes a first end and a second end, the fixing portion is fixed to the periphery of the bearing portion through the first end, and the second end is located at a side of the first end away from the bearing portion; The bearing part and the fixing part surround to form a cavity, the first magnetic structure is fixed on the bearing part and is located in the cavity, and the vibration component is fixed on the second end of the fixing part so that the vibration component is fixed to the bracket.

12. The speaker core according to claim 11, characterized in that: The bearing portion and the fixing portion are integrally formed.

13. The speaker core according to claim 11, characterized in that: When the first magnetic structure includes at least one electromagnetic induction coil, a wiring hole is provided on the bearing portion and / or the fixing portion, and an end of the electromagnetic induction coil extends through the wiring hole to receive the first signal or the second signal.

14. A speaker module, characterized in that: It comprises a shell and a core, wherein the core is the speaker core according to any one of claims 1 to 13; The speaker core is located in the shell and divides the accommodating cavity in the shell into a front cavity and a rear cavity.

15. An electronic device, characterized in that: A speaker module is included, wherein the speaker module includes a core, and the core is the speaker core according to any one of claims 1 to 13; The speaker module has a containing cavity, and the speaker core divides the containing cavity into a front cavity and a rear cavity.

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