Loudspeaker module and electronic equipment

Abstract

The invention provides a loudspeaker module and electronic equipment. The loudspeaker module comprises a shell and a loudspeaker; the shell is provided with an installation space, the loudspeaker divides the installation space into a first space and a second space, when the loudspeaker works, first sound waves are formed in the first space, second sound waves are formed in the second space, and the second sound waves and the first sound waves are equal in amplitude and opposite in phase; the shell is also provided with a first sounding hole and a second sounding hole which are arranged oppositely, the first sounding hole is communicated with the first space, and the second sounding hole is communicated with the second space; the shell is further provided with a third sound production hole and a phase inversion cavity, one end of the phase inversion cavity is communicated with the second space, the other end of the phase inversion cavity is communicated with the third sound production hole, the phase inversion cavity is used for forming a third sound wave at the third sound production hole when the loudspeaker works, and the phase of the third sound wave is the same as that of the first sound wave. And the third sound wave is superposed with the first sound wave passing through the first sound production hole. The loudspeaker module is large in loudness and can effectively restrain sound leakage.

Description

Speaker modules and electronic equipment

[0001] This application claims priority to the Chinese patent application with application number 202220695643.2 filed with the State Intellectual Property Office of China on March 28, 2022, and priority to the Chinese patent application with invention name “Speaker module and electronic device”; and claims priority to the Chinese patent application with application number 202223081917.8 filed with the State Intellectual Property Office of China on November 21, 2022, and priority to the Chinese patent application with invention name “Speaker module and electronic device”; all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of audio technology, and in particular to a speaker module and an electronic device. Background Art

[0003] Speakers, as a common electroacoustic transducer, are widely used in various electronic devices (such as mobile phones and smart glasses). For example, when used in smart glasses, the speakers can be installed in the temples of the smart glasses. Unlike in-ear devices such as headphones, when the speakers are installed in the temples of smart glasses, there is a large distance between the speakers and the ear canal, and sound waves propagate in the air in a non-directional manner. Therefore, speakers installed in the temples of smart glasses may have low loudness and sound leakage during use.

[0004] Utility Model Content

[0005] The present invention provides a speaker module and an electronic device including the speaker module. The speaker module and the electronic device provided by the present invention have high loudness and can effectively suppress sound leakage.

[0006] In the first aspect, the present application provides a speaker module, comprising a shell and a speaker; the shell has an installation space, the speaker is fixed to the installation space, and the installation space is divided into a first space and a second space, when the speaker is working, a first sound wave is formed in the first space, and a second sound wave is formed in the second space, and the amplitude of the second sound wave is equal to that of the first sound wave and the phase is opposite; the shell also has a first sound hole and a second sound hole arranged back to back, the first sound hole is connected to the first space, and the second sound hole is connected to the second space.

[0007] The shell also has a third sound hole and an inverted phase cavity. One end of the inverted phase cavity is connected to the second space, and the other end of the inverted phase cavity is connected to the third sound hole. The inverted phase cavity is used to form a third sound wave at the third sound hole when the speaker is working. The phase of the third sound wave is the same as the phase of the first sound wave, and the third sound wave is superimposed on the first sound wave passing through the first sound hole.

[0008] In the present application, since the amplitudes of the first sound wave and the second sound wave are equal and the phases are opposite, the speaker module can form a dipole sound field. Since the sound emission direction of the first sound hole is opposite to the sound emission direction of the second sound hole, the sound field formed by the speaker module has an "8"-shaped directivity characteristic, and the first sound wave and the second sound wave form two effective listening areas near the speaker module. When the first sound wave and the second sound wave are transmitted to a distant place, the first sound wave and the second sound wave with equal amplitudes and opposite phases will cancel each other out in the far field, forming a silencer area and realizing far-field silencer. Therefore, an electronic device including the speaker module can realize near-field directional sound emission to increase loudness, and can also realize far-field silencer, effectively suppress sound leakage, and improve privacy.

[0009] Furthermore, because the speaker module is equipped with an inverted cavity, when the speaker is operating, the inverted cavity generates a third sound wave at the third sound-emitting hole. This third sound wave has the same phase as the first sound wave, so the superposition of the third sound wave and the first sound wave effectively improves the frequency response of the speaker module, thereby improving the frequency response of the electronic device including the speaker module and enhancing the wearer experience. Furthermore, due to the relatively low energy of the third sound wave, its impact on the far field is negligible.

[0010] In some possible implementations, the sound emission direction of the third sound emission hole is the same as the sound emission direction of the first sound emission hole, so that the superposition effect of the third sound wave and the first sound wave is better.

[0011] In some possible implementations, the third sound wave resonates within a frequency range of 50 Hz to 200 Hz, thereby effectively improving the low-frequency response of the speaker module 30 to solve the problem of insufficient low frequency.

[0012] In some possible implementations, a loudspeaker includes a base, a vibration assembly, and a magnetic circuit assembly; the base has an inner cavity; the magnetic circuit assembly is disposed within the inner cavity and has a magnetic gap; the vibration assembly includes a first diaphragm, a second diaphragm, and a voice coil, the first and second diaphragms being located on opposite sides of the magnetic circuit assembly, the peripheries of the first and second diaphragms being connected to the base, the voice coil being located within the magnetic gap, and the opposite sides of the voice coil being connected to the first and second diaphragms, respectively. One of the first and second diaphragms faces a first space, and the other faces a second space.

[0013] As you can understand, the voice coil is located between the first and second diaphragms, passing through the magnetic gap of the magnetic circuit assembly and connecting the two diaphragms. When the voice coil is energized, it is acted upon by the magnetic field, generating a Lorentz force perpendicular to the plane of the first diaphragm. This force causes the voice coil to cut through the magnetic flux lines in that direction, pushing the first and second diaphragms together in a reciprocating motion in that direction. In other words, when the voice coil is energized, the voice coil, first and second diaphragms move together in the same direction as a whole.

[0014] It's understandable that there are certain deviations during the speaker manufacturing and assembly process. As a result, the diaphragm will experience some left-right deflection or tilt (i.e., polarization) during movement. Furthermore, this polarization phenomenon becomes more pronounced as the diaphragm's amplitude increases. When the diaphragm exhibits polarization during movement, it may contact the magnetic circuit components, causing friction and generating some noise. This noise can cause the diaphragm to fail to achieve the desired amplitude setting during actual operation, affecting the loudness of the speaker.

[0015] The speaker of the present application arranges the voice coil between the first diaphragm and the second diaphragm and connects the first diaphragm and the second diaphragm so that the three form a moving whole, thereby ensuring the consistency of the first diaphragm, the second diaphragm and the voice coil during the movement, ensuring the symmetry of the upper and lower vibration stiffness of the vibration component, and improving the vibration stability of the entire vibration component. It can more effectively improve the polarization phenomenon, improve the vibration balance of the vibration component under large amplitude conditions, avoid hitting the magnetic circuit component and generating noise, so that the speaker can achieve the expected amplitude setting value in actual work. Since the loudness of the speaker is determined by the vibration area and amplitude, that is, under the condition of the same effective radiation area, the speaker of the present application can achieve a larger amplitude and obtain a higher loudness on the basis of miniaturization, so that the loudness of the speaker used in small electronic devices such as bracelets and reading pens is not constrained by space, thereby improving the user experience.

[0016] In some possible implementations, the voice coil includes a first side portion and a second side portion disposed opposite each other, both of which are parallel to the central axis of the voice coil, the first side portion being connected to the first diaphragm, and the second side portion being connected to the second diaphragm. It is understood that the voice coil is disposed perpendicularly between the first and second diaphragms and connected thereto, thereby making the voice coil smaller in the width direction of the speaker, facilitating the miniaturization of the speaker in terms of width and making it more suitable for elongated products such as electronic devices such as reading pens and selfie sticks.

[0017] In some possible implementations, the vibration assembly further includes a first connecting member and a second connecting member, wherein the first connecting member connects the first side portion and the first diaphragm, and the second connecting member connects the second side portion and the second diaphragm. The first connecting member and the second connecting member are exactly the same, and their materials may be hard materials, such as plastic, metal, etc. It is understandable that the voice coil is indirectly connected to the first diaphragm and the second diaphragm through the first connecting member and the second connecting member, so that the voice coil is located at the optimal force-bearing position of the magnetic gap, ensuring that the voice coil is optimally stressed. At the same time, the three form a vibration whole, thereby improving the overall vibration stiffness of the vibration assembly and ensuring the overall vibration stability of the vibration assembly. Connectors (the first connecting member and the second connecting member) are provided on both sides of the voice coil, so that the structure of the vibration assembly is symmetrical relative to the two sides of the voice coil, ensuring the symmetry of the upper and lower vibration stiffness of the vibration assembly, and further improving the vibration stability of the vibration assembly.

[0018] In some possible implementations, the vibration assembly further includes a support member disposed within the voice coil, with one end connected to the first side portion and the other end connected to the second side portion, thereby supporting the first side portion and the second side portion. Because the voice coil has a hollow structure and is susceptible to deformation during movement, which can affect vibration stability, the present application provides a support member within the voice coil to ensure the rigidity of the voice coil, prevent deformation during movement, and thus maintain the vibration stability of the vibration assembly.

[0019] In some possible implementations, the magnetic circuit assembly includes a first portion and a second portion, both of which are magnetic. The first portion and the second portion are spaced apart from each other, forming a magnetic gap between the first portion and the second portion. It will be appreciated that the magnetic properties of the two opposing surfaces of the first portion and the second portion are opposite. By spacing the first and second portions of the magnetic circuit assembly apart to form the magnetic gap, a voice coil can be positioned between the first and second portions. When current is applied to the voice coil, the magnetic field generates a Lorentz force, causing it to move through magnetic flux lines.

[0020] In some possible implementations, the voice coil includes a first end face and a second end face disposed opposite each other, both the first end face and the second end face being perpendicular to the central axis of the voice coil, the first end face being connected to the first diaphragm, and the second end face being connected to the second diaphragm. It will be appreciated that the voice coil is disposed parallel to and between the first and second diaphragms, and is connected thereto, allowing the speaker to fully utilize horizontal space, reducing the speaker's thickness and making it suitable for ultra-thin electronic devices such as mobile phones and tablets.

[0021] In some possible implementations, there are multiple voice coils, arranged along the length of the speaker. It is understood that the speaker provided in this application can be sized to the specific form factor of the product by adding voice coils to better suit the product, while achieving comparable performance within the limited device space. Furthermore, the length-to-width ratio of an excessively long voice coil winding can lead to a decrease in dimensional accuracy. Replacing a single voice coil with multiple horizontally arranged voice coils improves the yield rate and saves costs.

[0022] In some possible implementations, the magnetic gap extends along the length of the speaker, with multiple voice coils spaced apart within the gap. Alternatively, the speaker includes multiple magnetic gaps spaced apart along the length of the speaker, with multiple voice coils positioned in corresponding locations within the gaps. By arranging the magnetic gaps along the length of the speaker, the speaker can achieve comparable performance within a limited width.

[0023] In some possible implementations, the vibration assembly further includes a connecting circuit, the connecting circuit being disposed on a surface of the first diaphragm or the second diaphragm on a side proximal to the voice coil, the connecting circuit being electrically connected to the voice coil. It is understood that providing the connecting circuit in the vibration assembly enables electrical connection between the voice coil and external electrical components of the speaker.

[0024] In some possible implementations, the connecting circuit is a flexible circuit board. Compared with the traditional speaker that is electrically connected to the circuit board of the electronic device through a voice coil lead-out circuit, the present application improves the electrical stability of the speaker by setting up a flexible circuit board to electrically connect to the circuit board of the electronic device.

[0025] In some possible implementations, the connecting lines are wires. Printing copper wires on the surface of the first diaphragm serves as a line lead-out solution, replacing the flexible printed circuit board, thereby reducing the vibration mass of the vibration assembly and improving the vibration performance of the vibration assembly.

[0026] In some possible implementations, the first diaphragm and the second diaphragm are symmetrically arranged relative to the magnetic circuit assembly. It is understandable that when the first diaphragm and the second diaphragm are symmetrically arranged relative to the magnetic circuit assembly, since the first diaphragm and the second diaphragm are driven by the same voice coil, the sound waves emitted by the first diaphragm and the second diaphragm to the outside of the speaker are equal in size and opposite in phase (that is, the phase difference is 180°). In other words, the speaker at this time is a dipole speaker, which can form a dipole sound field. When the speaker makes a sound, two sounds with opposite phases are emitted from the first diaphragm and the second diaphragm respectively and transmitted to the outside of the speaker. According to the dipole principle, the two sound waves will cancel each other out in the far field, forming a silencer area, realizing far-field silencer, effectively improving the far-field privacy of the electronic device, and improving the sound leakage problem of the speaker.

[0027] In some possible implementations, the speaker includes a base, a vibration component, a first magnetic circuit component and a second magnetic circuit component. The base has an inner cavity, the vibration component is arranged in the inner cavity, the first magnetic circuit component and the second magnetic circuit component are respectively located on both sides of the vibration component and are symmetrically arranged relative to the vibration component.

[0028] The vibration assembly includes a diaphragm, a first voice coil, and a second voice coil. The diaphragm, the first voice coil, and the second voice coil are stacked in a first direction. The diaphragm includes a first surface and a second surface disposed opposite to each other in the first direction. The diaphragm divides an inner cavity into a first sound cavity and a second sound cavity. The first voice coil is fixed to the first surface, and the second voice coil is fixed to the second surface. The first magnetic circuit assembly and the second magnetic circuit assembly are located in the first sound cavity and the second sound cavity, respectively. The first sound cavity communicates with a first space, and the second sound cavity communicates with a second space.

[0029] This implementation secures the diaphragm to the center of the base, with the first and second voice coils, and the first and second magnetic circuit assemblies symmetrically distributed on either side of the diaphragm. This isolates the base's internal cavity, forming first and second symmetric sound cavities relative to the diaphragm. This ensures that the sound wave transmission channel and air volume enclosed on both sides of the diaphragm are equal or approximately equal. The sound waves are affected by the propagation channel in a nearly identical manner during transmission, resulting in the same loudness from both sides of the diaphragm. Consequently, the sound waves have comparable intensity on both sides of the diaphragm, resulting in two equal and oppositely directed sound sources. From a distant fixed location in the environment, since the two sound sources are relatively close, it can be assumed that the fixed location is approximately the same distance from the two sources. These two sound sources generate two equal and oppositely directed sound fields, resulting in the fixed location receiving two equal and oppositely directed sound waves. Due to the dipole superposition effect, the sound waves at this fixed location are effectively canceled out to the greatest extent possible, significantly improving sound leakage during speaker operation, protecting user privacy, and enhancing the user experience.

[0030] In some possible implementations, the projection of the first voice coil on the first surface is annular, the height of the first voice coil in the first direction is a first height, the distance between the first magnetic circuit assembly and the first surface is a first distance, and the first height is greater than the first distance. And / or, the projection of the second voice coil on the second surface is annular, the height of the second voice coil in the first direction is a second height, the distance between the second magnetic circuit assembly and the second surface is a second distance, and the second height is greater than the second distance.

[0031] When the first and second voice coils are energized, the currents flowing through them are directed in the same direction. Due to the magnetic field, the first and second voice coils experience the same Lorentz force. These two voice coils generate a Lorentz force perpendicular to the plane of the diaphragm (the first direction), i.e., the thickness of the speaker. This force cuts through the magnetic flux lines along the thickness of the speaker, pushing the diaphragm back and forth in this direction. This reciprocating motion of the diaphragm causes the air to vibrate and produce sound. When the diaphragm vibrates downward, the air below the diaphragm compresses due to the reduced volume, while the air above the diaphragm expands due to the increased volume. Consequently, the sound waves generated on the upper and lower sides of the diaphragm are in opposite phases (i.e., a phase difference of 180°). In this implementation, the first and second voice coils are simultaneously subjected to forces in the same direction, making it easier to push the diaphragm to vibrate, which is beneficial for the vibration effect.

[0032] In some possible implementations, the first voice coil and the second voice coil are symmetrically arranged relative to the diaphragm, so that the sound wave transmission channel and the air volume enclosed on both sides of the diaphragm are equal or approximately equal, and the sound waves are almost uniformly affected by the propagation channel during the transmission process, so that the loudness of the sound waves emitted on both sides of the diaphragm is the same, which greatly improves the sound leakage problem of the speaker during use, protects the user's privacy, and improves the user experience.

[0033] In some possible implementations, the first and second magnetic circuit assemblies are symmetrically arranged relative to the diaphragm. This ensures that the sound wave transmission channel and the air volume enclosed on both sides of the diaphragm are equal or approximately equal. This allows the sound waves to be affected by the propagation channel in a nearly identical manner during transmission, resulting in the sound waves emitted from both sides of the diaphragm having the same loudness. This significantly reduces sound leakage during use, protects user privacy, and enhances the user experience.

[0034] In some possible implementations, the vibration direction of the diaphragm is a first direction, so as to push the air on both sides of the diaphragm to produce sound. In some possible implementations, the base includes a frame, a first cover plate and a second cover plate, the first cover plate and the second cover plate respectively cover opposite sides of the frame, the diaphragm is connected to the inside of the frame, the first magnetic circuit assembly and the second magnetic circuit assembly are respectively connected to the first cover plate and the second cover plate, the first cover plate includes a first sound outlet, the second cover plate includes a second sound outlet, and the first sound outlet and the second sound outlet are symmetrical relative to the diaphragm, thereby maximally limiting the sound generated laterally relative to the thickness direction of the speaker when the dipole acoustic response is lateral (or in an actual system, generating very little lateral sound), maximizing the superposition and cancellation effect of the dipoles, and improving the sound leakage problem.

[0035] In some possible implementations, the first sound outlet includes a first opening and a second opening, and the first opening and the second opening are symmetrically arranged relative to the first cover plate, so that the sound waves generated on the left and right sides of the vibration component reach the first opening and the second opening at the same distance, and the air damping on the left and right sides is the same, thereby improving the vibration synchronization and stability of the vibration component.

[0036] In some possible implementations, the first magnetic circuit component includes a first gap, the second magnetic circuit component includes a second gap, the first gap and the second gap are symmetrically arranged relative to the diaphragm, the first voice coil at least partially extends into the first gap, and the second voice coil at least partially extends into the second gap, so that the second voice coil can achieve cutting magnetic flux lines in the thickness direction of the speaker after being energized.

[0037] In a second aspect, the present application further provides an electronic device comprising a housing and any of the above-described speaker modules, the housing having a first sound outlet and a second sound outlet, the speaker module being mounted within the housing, the first sound outlet and the third sound outlet of the speaker module being connected to the first sound outlet, and the second sound outlet of the speaker module being connected to the second sound outlet. The electronic device can achieve near-field directional sound emission with a high frequency response, and can also achieve far-field sound cancellation, effectively suppressing sound leakage and improving privacy. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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.

[0039] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0040] FIG2 is a schematic structural diagram of temples of the electronic device shown in FIG1 in some embodiments;

[0041] FIG3 is a schematic diagram of the electronic device shown in FIG1 in some usage scenarios;

[0042] FIG4 is a schematic diagram of the exploded structure of the temple shown in FIG2 ;

[0043] FIG5 is a schematic diagram of a partial cross-sectional structure of the temple shown in FIG2 in the AA direction;

[0044] FIG6 is a schematic diagram of the internal structure of the speaker module shown in FIG5 in some embodiments;

[0045] FIG7 is a schematic structural diagram of the speaker module shown in FIG6 at another angle;

[0046] FIG8 is a schematic diagram of a sound wave scene of the speaker module shown in FIG6 ;

[0047] FIG9 is a schematic diagram of sound waves of the electronic device shown in FIG1 in some usage scenarios;

[0048] FIG10 is a comparison diagram of the test results of an embodiment of the usage scenario shown in FIG9 and the sound pressure curve of a traditional solution;

[0049] FIG11 is a comparison diagram of the test results of the speaker module shown in FIG7 in one embodiment and the sound pressure curve of the traditional solution;

[0050] FIG12 is a schematic structural diagram of the speaker shown in FIG6 in some embodiments;

[0051] FIG13 is a schematic diagram of the exploded structure of the speaker shown in FIG12;

[0052] FIG14 is a schematic cross-sectional view of the loudspeaker shown in FIG12 taken along the BB direction;

[0053] FIG15 is a schematic structural diagram of the first cover plate of the speaker shown in FIG12 at another angle;

[0054] FIG16 is a schematic structural diagram of a magnetic circuit assembly of the loudspeaker shown in FIG12 in some embodiments;

[0055] FIG17 is a schematic structural diagram of a vibration assembly of the loudspeaker shown in FIG12 in some embodiments;

[0056] FIG18 is a schematic cross-sectional view of the loudspeaker shown in FIG12 taken along the CC direction;

[0057] FIG19 is a schematic cross-sectional view of another embodiment of the loudspeaker shown in FIG12 in the CC direction;

[0058] FIG20 is a schematic cross-sectional view of another embodiment of the loudspeaker shown in FIG12 in the CC direction;

[0059] FIG21 is a schematic structural diagram of another embodiment of the speaker shown in FIG6 ;

[0060] FIG22 is a schematic cross-sectional view of the loudspeaker shown in FIG21 in the DD direction;

[0061] FIG23 is a schematic structural diagram of a portion of the structure of the speaker shown in FIG21;

[0062] FIG24 is a schematic cross-sectional view of the loudspeaker shown in FIG21 in the EE direction;

[0063] FIG25 is a schematic structural diagram of a portion of the structure of the speaker shown in FIG21 in other embodiments;

[0064] FIG26 is a schematic cross-sectional view of another embodiment of the loudspeaker shown in FIG12 in the BB direction;

[0065] FIG27 is a schematic structural diagram of another embodiment of the speaker shown in FIG6 ;

[0066] FIG28 is a schematic diagram of a partial structural decomposition of the speaker shown in FIG27;

[0067] FIG29 is a schematic cross-sectional view of the loudspeaker shown in FIG27 in the FF direction;

[0068] FIG30 is a schematic structural diagram of the magnetic circuit assembly of the speaker shown in FIG27;

[0069] FIG31 is a schematic structural diagram of the third connecting member shown in FIG28;

[0070] FIG32 is a schematic structural diagram of the speaker shown in FIG6 in some embodiments;

[0071] FIG33 is a schematic diagram of the exploded structure of the speaker shown in FIG32;

[0072] FIG34 is another exploded structural diagram of the speaker shown in FIG32 ;

[0073] FIG35 is a schematic structural diagram of a first basin frame of the loudspeaker shown in FIG34 in some embodiments;

[0074] FIG36 is a schematic cross-sectional view of the speaker shown in FIG32 taken along direction II;

[0075] FIG37 is a schematic structural diagram of a vibration assembly of the loudspeaker shown in FIG32 in some embodiments;

[0076] FIG38 is a schematic cross-sectional view of the loudspeaker shown in FIG32 taken along the GG direction;

[0077] FIG39 is a detailed schematic diagram of the dipole effect of the loudspeaker shown in FIG32 ;

[0078] FIG40 is a simulation analysis diagram of the sound field intensity at the first and second sound outlets of a conventional speaker;

[0079] FIG41 is a simulation analysis diagram of the sound field intensity at the first sound outlet and the second sound outlet of the speaker of the present application;

[0080] FIG42 is a schematic structural diagram of the first magnetic circuit assembly of the loudspeaker shown in FIG32 in some embodiments;

[0081] FIG43 is a schematic diagram of the magnetic pole arrangement of the magnetic circuit assembly of the loudspeaker shown in FIG32;

[0082] FIG44 is a schematic structural diagram of another embodiment of the speaker shown in FIG6 ;

[0083] FIG45 is a schematic cross-sectional view of the loudspeaker shown in FIG44 taken along the HH direction;

[0084] FIG46 is a schematic structural diagram of the speaker shown in FIG45 in another embodiment;

[0085] FIG47 is a schematic structural diagram of another embodiment of the loudspeaker shown in FIG46;

[0086] FIG48 is a schematic structural diagram of the speaker shown in FIG6 in another embodiment;

[0087] FIG49 is a schematic structural diagram of the speaker shown in FIG6 in another embodiment;

[0088] FIG50 is a schematic structural diagram of another electronic device provided in this embodiment. DETAILED DESCRIPTION

[0089] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0090] 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. The directional terms mentioned in the embodiments of the present application, such as "up", "down", "left", "right", "inside", "outside", etc., are only reference to the directions of the accompanying 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. "Multiple" means at least two.

[0091] In the embodiments of the present application, "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship. The terms "include," "comprise," "have," and their variations all mean "including but not limited to," unless otherwise specifically emphasized.

[0092] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0093] Please refer to FIG1 , which is a schematic structural diagram of an electronic device 1000 provided in an embodiment of the present application.

[0094] In some embodiments, the electronic device 1000 may be a reading pen, a selfie stick, a wristband, a mobile phone, a smartwatch, augmented reality (AR) glasses, an AR helmet, or virtual reality (VR) glasses, etc., which require a speaker to output audio. This application specifically describes the electronic device 1000 as AR glasses.

[0095] In this embodiment, electronic device 1000 includes a frame 10, a display device 20, a speaker module 30, and a circuit board 40. The frame 10 serves as the outer shell of the electronic device 1000. The display device 20, speaker module 30, and circuit board 40 are all mounted on the frame 10. The display device 20 and speaker module 30 are both electrically connected to the circuit board 40, which is used to control the display of the display device 20 and the sound of the speaker module 30.

[0096] Illustratively, the frame 10 includes a frame 11 and temples 12 connected to the frame 11. There are two temples 12, each connected to opposite ends of the frame 11. It should be noted that in other embodiments, the frame 10 may also include a frame 11 and a fixing strap connected to the frame 11, which is not specifically limited in this application.

[0097] Exemplarily, the frame 11 may include two frames 111 and a crossbeam 112 connected between the two frames 111. Both frames 111 are provided with a receiving cavity for accommodating the electronic components of the electronic device 1000. The crossbeam 112 is integrally formed with the two frames 111 to simplify the molding process of the frame 11 and increase the overall strength of the frame 11. The material of the frame 11 includes, but is not limited to, metal, plastic, resin, or natural materials. It should be understood that the frame 11 is not limited to the full-frame type shown in FIG. 1 , but may also be a semi-frame type or a frameless type.

[0098] Exemplarily, there are two display devices 20, and the two display devices 20 have the same structure. Specifically, the two display devices 20 are respectively mounted on the two frames 111 of the frame 11. When the electronic device 1000 is worn on the wearer's head, one display device 20 corresponds to the wearer's left eye, and the other display device 20 corresponds to the wearer's right eye. In this case, the wearer can view virtual scenes or real scenes through the two display devices 20. It should be noted that in some other embodiments, the structures of the two display devices 20 may be different, or the number of the two display devices 20 may be one or more, and this application does not specifically limit this.

[0099] Exemplarily, the display device 20 is mounted in the frame 111 and electrically connected to the circuit board 40. In this embodiment, the circuit board 40 can be mounted inside the temple 12. There can be two circuit boards 40, one located in each temple 12 and electrically connected to its corresponding display device 20. In other embodiments, there can be only one circuit board 40, located in one of the temples 12. In other embodiments, the circuit board 40 can be mounted in the frame 111 or elsewhere.

[0100] Exemplarily, the two temples 12 are rotatably connected to opposite ends of the frame 11. Specifically, the two temples 12 are rotatably connected to the two frame bodies 111 of the frame 11. When the electronic device 1000 is in the unfolded state (as shown in FIG1 ), the two temples 12 are rotated relative to the frame 11 to be opposite to each other. At this time, the two temples 12 of the electronic device 1000 can be respectively mounted on the two ears of the wearer, and the crossbar 112 is mounted on the bridge of the wearer's nose to be worn on the wearer's head. When the electronic device 1000 is in the folded state, the two temples 12 are rotated relative to the frame 11 to at least partially overlap each other and be accommodated inside the frame 11. At this time, the electronic device 1000 can be stored.

[0101] It should be noted that the terms "inside" and "outside" used in this application to refer to electronic device 1000 are primarily based on the orientation of electronic device 1000 when worn on the wearer's head. When worn by the wearer, the direction closer to the wearer's head is considered inside, while the direction farther from the wearer's head is considered outside. These terms do not limit the orientation of electronic device 1000 in other scenarios.

[0102] It is understandable that in some other embodiments, the two temples 12 can be fixedly connected to the two frames 111 respectively, or the two temples 12 can be integrally formed with the frame 11, that is, the electronic device 1000 is always in an unfolded state, and this application does not make any specific limitations on this.

[0103] It is understandable that the two temples 12 in this embodiment have the same structure, and the structure of the temple 12 will be described below using one of the temples 12 as an example. Of course, in other embodiments, the structures of the two temples 12 may also be different.

[0104] Please refer to Figures 2 and 3 in combination. Figure 2 is a structural diagram of the temple 12 of the electronic device 1000 shown in Figure 1 in some embodiments, and Figure 3 is a schematic diagram of the electronic device 1000 shown in Figure 1 in some usage scenarios.

[0105] In some embodiments, the temple 12 may include a connecting section 121, an intermediate section 122, and an ear-hanging section 123. The connecting section 121, the intermediate section 122, and the ear-hanging section 123 are connected in sequence. The side of the connecting section 121 away from the intermediate section 122 can be rotatably connected to the corresponding frame 111, and the ear-hanging section 123 is used to wear the temple 12 above the wearer's ear. The intermediate section 122 is provided with a receiving cavity and a first sound outlet hole 13 and a second sound outlet hole 14 connected to the receiving cavity. The first sound outlet hole 13 and the second sound outlet hole 14 can be arranged opposite to each other. The speaker module 30 can be installed in the receiving cavity, and the sound emitted by the speaker module 30 can be transmitted to the outside of the receiving cavity through the first sound outlet hole 13 and the second sound outlet hole 14.

[0106] The first sound outlet 13 can emit sound toward the wearer's ears, while the second sound outlet 14 can emit sound away from the wearer's ears. In the embodiments of the present application, "the sound outlet direction of a hole" can be roughly understood as the direction in which sound propagates through the hole. For example, the sound outlet directions of the first sound outlet 13 and the second sound outlet 14 are opposite. In other embodiments, the sound outlet directions of the first sound outlet 13 and the second sound outlet 14 can also form an angle.

[0107] For example, as shown in Figures 2 and 3, the middle section 122 can protrude relatively downward, with the protruding portion close to the wearer's external auditory canal. The first sound outlet 13 is provided in the protruding portion, so that the first sound outlet 13 can be closer to the wearer's ear. The sound emitted by the speaker module 30 is transmitted through the first sound outlet 13 and directly enters the wearer's external auditory canal, allowing the wearer to quickly hear the sound emitted by the speaker module 30. Of course, in some other embodiments, the middle section 122 may not protrude downward. In some other embodiments, the speaker module 30 can also be provided in other locations, for example, in the connecting section 121, the ear hook section 123, or other locations of the frame 111.

[0108] In some embodiments, there are two speaker modules 30, each of which is provided on one temple 12. It is understood that in this embodiment, the speaker modules 30 provided on the two temples 12 have the same structure. Of course, in other embodiments, the structures of the speaker modules 30 provided on the two temples 12 may also be different.

[0109] Exemplarily, the circuit board 40 integrates a processor, a memory, and various other circuit devices. The display device 20 and the speaker module 30 are coupled to the processor. The processor may include one or more processing units, for example: the processor may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Among them, different processing units can be independent devices or integrated into one or more processors.

[0110] The processor can generate operation control signals based on instruction opcodes and timing signals to complete the control of instruction extraction and execution.

[0111] The processor may also include internal memory for storing instructions and data. In some embodiments, the memory in the processor may be a cache memory. This memory can store instructions or data that have been used by the processor or that are frequently used. When the processor needs to use the instruction or data, it can directly access it from the memory. This avoids duplicate accesses, reduces processor latency, and thus improves system efficiency.

[0112] In some embodiments, the processor may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface. The processor may be connected to modules such as a touch sensor, a wireless communication module, a display, and a camera through at least one of the above interfaces.

[0113] The memory can be used to store computer executable program code, which includes instructions. The memory may include a program storage area and a data storage area. The program storage area may store an operating system, an application required for at least one function (such as a photo taking function, a video recording function, etc.), etc. The data storage area may store data created during the use of the electronic device 1000 (such as image data, video data, etc.), etc. In addition, the memory may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc.

[0114] The processor executes various functional methods or data processing of the electronic device 1000 by running instructions stored in the memory and / or instructions stored in the memory set in the processor, for example, causing the display device 20 to present a virtual reality image, causing the speaker module 30 to emit sound, etc.

[0115] In this embodiment, when the wearer wears AR glasses, the virtual reality image can be transmitted to the wearer's eyes through the display device 20, and the sound emitted by the speaker module 30 can be output to the outside of the electronic device 1000 through the sound hole and heard by the wearer, thereby realizing the audio-visual function of the electronic device 1000.

[0116] Please refer to FIG. 4 and FIG. 5 , FIG. 4 is a schematic diagram of the exploded structure of the temple 12 shown in FIG. 2 , and FIG. 5 is a schematic diagram of a partial cross-sectional structure of the temple 12 shown in FIG. 2 along the AA direction.

[0117] In some embodiments, the middle section 122 of the temple 12 may include a carrier 1221 and a cover plate 1222. The carrier 1221 defines a cavity, which opens on one side of the carrier 1221. The cover plate 1222 is mounted in the opening. The carrier 1221 and the cover plate 1222 together enclose a receiving chamber 1225. In other words, the receiving chamber 1225 is comprised of two components to facilitate installation of the speaker module 30 and other components within the receiving chamber 1225. The cover plate 1222 can be removably attached to the opening to facilitate maintenance of the components within the receiving chamber 1225. Of course, in other embodiments, the cover plate 1222 can also be non-removably fixed to the opening.

[0118] Exemplarily, the speaker module 30 is mounted in the receiving cavity 1225, dividing the receiving cavity 1225 into two independent channels. The channel below the speaker module 30 is the first channel 1228, and the channel above the speaker module 30 is the second channel 1229. The first sound outlet 13 is connected to the first channel 1228, and the second sound outlet 14 is provided in the cover plate 1222 and is connected to the second channel 1229.

[0119] Please refer to FIG. 6 and FIG. 7 . FIG. 6 is a schematic diagram of the internal structure of the speaker module 30 shown in FIG. 5 in some embodiments. FIG. 7 is a schematic diagram of the structure of the speaker module 30 shown in FIG. 6 at another angle.

[0120] In some embodiments, the speaker module 30 includes a speaker 3 and a housing 4. The housing 4 has a mounting space 41, to which the speaker 3 is fixed, dividing the mounting space 41 into a first space 411 and a second space 412. When the speaker 3 is in operation, a first sound wave is generated in the first space 411 and a second sound wave is generated in the second space 412. The second sound wave has the same amplitude as the first sound wave and an opposite phase.

[0121] The housing 4 further has a first sound-emitting hole 42 and a second sound-emitting hole 43, which are arranged in opposite directions. The first sound-emitting hole 42 communicates with the first space 411, allowing the first sound wave to be transmitted through the first sound-emitting hole 42 to the exterior of the speaker module 30, thereby producing sound. The second sound-emitting hole 43 communicates with the second space 412, allowing the second sound wave to be transmitted through the second sound-emitting hole 43 to the exterior of the speaker module 30, thereby producing sound.

[0122] The shell 4 can also have a third sound hole 44 and an inverted cavity 45. One end of the inverted cavity 45 is connected to the second space 412, and the other end of the inverted cavity 45 is connected to the third sound hole 44. The inverted cavity 45 is used to form a third sound wave at the third sound hole 44 when the speaker 3 is working. The phase of the third sound wave is the same as the phase of the first sound wave, and the third sound wave is superimposed on the first sound wave passing through the first sound hole 42.

[0123] For example, the sound emission direction of the third sound emission hole 44 can be the same as the sound emission direction of the first sound emission hole 42, so that the superposition effect of the third sound wave and the first sound wave is better. In other embodiments, the sound emission direction of the third sound emission hole 44 can also be different from the sound emission direction of the first sound emission hole 42, for example, the sound emission direction of the third sound emission hole 44 can form an angle between the two, as long as the third sound wave and the first sound wave can be superimposed.

[0124] The inverted cavity 45 may be formed by the interior space of an inverted tube, which is assembled with other parts of the housing 4. Alternatively, the housing 4 may not include an inverted tube, and the inverted cavity 45 may be formed by surrounding a portion of the housing 4. The present embodiment does not impose strict limitations on the specific structure of the inverted cavity 45.

[0125] Please refer to FIG. 8 , which is a schematic diagram of a sound wave scene of the speaker module 30 shown in FIG. 6 .

[0126] In this embodiment, since the amplitudes of the first sound wave and the second sound wave are equal and the phases are opposite, the speaker module 30 can form a dipole sound field. Since the sound emission direction of the first sound hole 42 and the sound emission direction of the second sound hole 43 are opposite to each other, the sound field formed by the speaker module 30 has an "8"-shaped directivity characteristic, and the first sound wave and the second sound wave form two effective listening areas near the speaker module 30. When the first sound wave and the second sound wave are transmitted to a distant place, the first sound wave and the second sound wave with equal amplitudes and opposite phases will cancel each other out in the far field, forming a silencer area and achieving far-field silencer. Therefore, the electronic device 1000 including the speaker module 30 can achieve near-field directional sound emission to increase loudness, and can also achieve far-field silencer, effectively suppress sound leakage, and improve privacy.

[0127] Furthermore, because the speaker module 30 is provided with an inverted phase cavity 45, when the speaker 3 is operating, the inverted phase cavity 45 generates a third sound wave at the third sound emission hole 44. The third sound wave has the same phase as the first sound wave. Therefore, the superposition of the third sound wave and the first sound wave effectively improves the frequency response of the speaker module 30, thereby improving the frequency response of the electronic device 1000 including the speaker module 30 and enhancing the wearer's experience. Furthermore, due to the relatively low energy of the third sound wave, its impact on the far field is negligible.

[0128] Referring to Figures 5 to 7 , speaker module 30 is mounted within the housing of electronic device 1000. First and third sound holes 42, 44 of speaker module 30 communicate with first sound outlet 13 via first channel 1228. Second sound hole 43 of speaker module 30 communicates with second sound outlet 14. When speaker 3 of speaker module 30 is operating, the first and third sound waves superimpose and are emitted from first sound outlet 13, while the second sound wave is emitted from second sound outlet 14.

[0129] Please refer to Figures 3, 9 and 10 in combination. Figure 9 is a schematic diagram of sound waves of the electronic device shown in Figure 1 in some usage scenarios, and Figure 10 is a comparison diagram of the test results of the usage scenario shown in Figure 9 in one embodiment and the sound pressure curve of the traditional solution.

[0130] When the wearer wears the electronic device 1000 shown in Figure 1, the first sound outlet 13 of the electronic device 1000 faces the wearer's ear, and the second sound outlet 14 faces away from the wearer's ear. The sound field formed by the speaker module 30 of the electronic device 1000 has an "8"-shaped directivity characteristic. The wearer's ear is located in the effective listening area and can receive the first sound wave and the third sound wave. The frequency response of the sound emitted by the speaker module 30 can meet the wearer's hearing needs, and the wearer can obtain a better in-ear loudness experience, improving the wearer's user experience. At the same time, the first sound wave and the second sound wave cancel each other in the far field, forming a silencer area, achieving far-field silence, and effectively improving the far-field privacy of the electronic device 1000. In addition, for the wearer, the distance between the first sound outlet 13 and the second sound outlet 14 and the ear is relatively large, which does not meet the conditions of the acoustic dipole effect. The degree of sound wave cancellation is small, so the wearer can hear sound with appropriate loudness. Therefore, the electronic device 1000 can achieve a high loudness and effectively suppress sound leakage.

[0131] In Figure 10, the horizontal axis is frequency in Hertz (Hz), and the vertical axis is sound pressure in dB. The solid line in Figure 10 represents the embodiment of the present application, and the dashed line represents the traditional solution. As shown in Figure 10, the comparison of the solid line and the dashed line in box A1 shows that the frequency response of the low-frequency band below 1K heard by the wearer's ears is improved and higher than that of the traditional solution. The comparison of the solid line and the dashed line in box A2 shows that the frequency response of the mid- and high-frequency bands from 1K to 5K in the far field is lower than that of the traditional solution, and the sound leakage is relatively small.

[0132] In some embodiments, the third sound wave resonates within a frequency range of 50 Hz to 200 Hz. The size of the inverted cavity 45 can be designed so that the third sound wave formed by the inverted cavity 45 at the third sound hole 44 resonates within a frequency range of 50 Hz to 200 Hz, thereby effectively improving the frequency response of the low-frequency band of the speaker module 30 to solve the problem of insufficient low frequency. In addition, since the sound leakage problem of the traditional speaker module 30 in the far field is mainly formed in the mid- and high-frequency bands, the inverted cavity 45 sets the resonant frequency band of the third sound wave in the low-frequency band, and the third sound wave has almost no effect on the sound leakage phenomenon and can be ignored.

[0133] Please refer to FIG. 11 , which is a comparison diagram of the test results of the speaker module 30 shown in FIG. 7 in one embodiment and the sound pressure curve of a traditional solution.

[0134] In Figure 11, the horizontal axis represents frequency in Hertz (Hz), and the vertical axis represents sound pressure in dB. The solid line in Figure 11 represents the embodiment of the present application, while the dashed line represents the conventional solution. As shown in Figure 17, the frequency response of the speaker module 30 in the 50 Hz to 200 Hz frequency range is higher than that of the conventional solution.

[0135] Exemplarily, the inverted cavity 45 may be in a straight cavity shape or a curved cavity shape, such as a serpentine shape or a meander shape, to meet the requirement of adjusting the resonant frequency of the third sound wave.

[0136] In the present application, the speaker 3 of the speaker module 30 has a variety of different embodiments, and some embodiments of the speaker 3 are specifically described below.

[0137] In one embodiment, please refer to Figures 12, 13, and 14. Figure 12 is a schematic diagram of the structure of the speaker 3 shown in Figure 6 in some embodiments, Figure 13 is a schematic diagram of the exploded structure of the speaker 3 shown in Figure 12, and Figure 14 is a schematic diagram of the cross-sectional structure of the speaker 3 shown in Figure 12 along the BB direction. As shown in Figure 14, the width direction of the speaker 3 is the X-axis direction, the length direction of the speaker 3 is the Y-axis direction, and the thickness direction of the speaker 3 is the Z-axis direction.

[0138] Exemplarily, the loudspeaker 3 may include a base 31, a vibration assembly 32, and a magnetic circuit assembly 33. The base 31 has an inner cavity 311. The magnetic circuit assembly 33 is disposed in the inner cavity 311 and has a magnetic gap 333. The vibration assembly 32 includes a first diaphragm 321, a second diaphragm 322, and a voice coil 323. The first diaphragm 321 and the second diaphragm 322 are located on opposite sides of the magnetic circuit assembly 33. It can also be understood that the second diaphragm 322, the magnetic circuit assembly 33, and the first diaphragm 321 are stacked in sequence in the Z-axis direction of the loudspeaker 3. The peripheries of the first diaphragm 321 and the second diaphragm 322 are connected to the base 31. The voice coil 323 is located in the magnetic gap 333, and the opposite sides of the voice coil 323 are connected to the first diaphragm 321 and the second diaphragm 322, respectively. The periphery of the first diaphragm 321 (or the second diaphragm 322) can be completely connected to the base 31, or partially connected to the base 31.

[0139] It is understood that when the voice coil 323 is energized, it is acted upon by the magnetic field, generating a Lorentz force parallel to a first direction and moving in that direction to cut through the magnetic lines of force, thereby pushing the first diaphragm 321 and the second diaphragm 322 to move back and forth along that direction. The first direction is perpendicular to the first diaphragm 321 and the second diaphragm 322. That is, when the voice coil 323 is energized, the voice coil 323, the first diaphragm 321, and the second diaphragm 322 move together in the same direction as a whole, and both the first diaphragm 321 and the second diaphragm 322 produce sound, generating a first sound wave and a second sound wave, with the first sound wave and the second sound wave having equal amplitudes and opposite phases. When the first sound wave and the second sound wave have similar amplitudes, they are also considered to have equal amplitudes.

[0140] For example, when the speaker 3 is used in the speaker module 30, one of the first diaphragm 321 and the second diaphragm 322 faces the first space 411, and the other faces the second space 412. In this embodiment, the first diaphragm 321 faces the first space 411, and the second diaphragm 322 faces the second space 412. In this embodiment, the first diaphragm 321 faces the first sound hole 42, and the second diaphragm 322 faces the second sound hole 43. When the first diaphragm 321 vibrates, a first sound wave is formed in the first space 411. When the second diaphragm vibrates, a second sound wave is formed in the second space 412. The phase of the second sound wave is equal to the amplitude of the first sound wave and opposite in phase.

[0141] It is understandable that there are certain deviations in the processing and assembly of the loudspeaker 3. Therefore, the diaphragm will experience certain left and right deflection or tilt during movement (i.e., polarization). Moreover, this polarization phenomenon will become more obvious as the diaphragm amplitude increases. When the diaphragm exhibits polarization during movement, it may touch the magnetic circuit components, causing friction and emitting certain noise. The generation of noise will cause the diaphragm to fail to reach the expected amplitude setting value during actual operation, affecting the loudness of the sound emitted by the loudspeaker 3.

[0142] In the speaker 3 of this embodiment, two diaphragms (i.e., a first diaphragm 321 and a second diaphragm 322) are respectively disposed on either side of the magnetic circuit assembly 33, and a voice coil 323 is disposed within the magnetic gap 333 of the magnetic circuit assembly 33, with the first diaphragm 321 and the second diaphragm 322 connected on either side. By combining the voice coil 323 with the two diaphragms (321, 322), a voice coil-dual diaphragm design is adopted, which ensures consistency among the first diaphragm 321, the second diaphragm 322, and the voice coil 323 during movement. This ensures the symmetry of the upper and lower vibration stiffness of the vibration assembly 32, improves the vibration stability of the entire vibration assembly 32, and more effectively improves polarization. This improves the vibration balance of the vibration assembly 32 under large amplitude conditions, avoids collision with the magnetic circuit assembly 33 and generates noise, and enables the speaker 3 to achieve the desired amplitude setting value during actual operation. Since the loudness of the speaker 3 is determined by the vibration area and amplitude, that is, under the condition of the same effective radiation area, the speaker 3 with a voice coil-dual diaphragm design can achieve a larger amplitude and obtain a higher loudness on the basis of miniaturization, so that the loudness of the speaker 3 used in small electronic devices such as bracelets and reading pens is not constrained by space, thereby improving the wearer experience.

[0143] At the same time, since the voice coil-dual diaphragm design improves the vibration stability of the vibration component 32, the speaker 3 of the present application can achieve a larger amplitude setting value and obtain higher loudness.

[0144] In addition, the first diaphragm 321 and the second diaphragm 322 of the present application are respectively located on opposite sides of the magnetic circuit assembly 33. Compared with setting the diaphragm on the periphery of the magnetic circuit assembly, it can effectively increase the vibration area of ​​the speaker 3, improve the utilization rate of the speaker 3 in a limited space, and obtain higher loudness.

[0145] In some embodiments, as shown in Figures 12 and 13, the base 31 is a roughly rectangular cylinder. The base 31 includes a frame 312, a first cover plate 313, and a second cover plate 314. The frame 312 is a hollow structure with openings on both sides. The two openings of the frame 312 are respectively a first opening 3122 and a second opening 3123. The first diaphragm 321 covers the first opening 3122 of the frame 312, and the first cover plate 313 fixes the first diaphragm 321 to the frame 312. The second diaphragm 322 covers the second opening 3123 of the frame 312, and the second cover plate 314 fixes the second diaphragm 322 to the frame 312. In other words, the first diaphragm 321 and the second diaphragm 322 respectively cover the opposite sides of the frame 312 to seal the inner cavity 311.

[0146] It is understood that the base 31 is composed of three parts (i.e., the frame 312, the first cover 313, and the second cover 314), so that the first diaphragm 321 and the second diaphragm 322 can be fixed to the frame 312, thereby facilitating the assembly of the speaker 3. In other embodiments, the shape of the base 31 can also be a cylinder, a square cylinder, or a special shape.

[0147] 14 , the frame 312 may further include a first slot 3123 and a second slot 3124, which are respectively disposed on two opposing longitudinal walls of the frame 312. The magnetic circuit assembly 33 is fixed to the frame 312. The magnetic circuit assembly 33 may be positioned within the frame 312 by the first slot 3123 and the second slot 3124, thereby stably securing the magnetic circuit assembly 33 to the frame 312.

[0148] Of course, in some other embodiments, the frame 312 may not include the first and second slots, and the magnetic circuit assembly 33 may be fixed to the frame 312 by bonding, bolting, or other connection methods. This application does not limit the connection method between the magnetic circuit assembly 33 and the frame 312. Alternatively, the frame 312 may include other limiting structures in addition to the first and second slots to limit the magnetic circuit assembly 33 to be fixed to the frame 312.

[0149] In other embodiments, the frame 312 may be made of a thermally conductive material. It is understood that the inner cavity of the speaker 3 is a sealed space. Since the voice coil 323 generates heat when it moves, the pressure inside the speaker 3 fluctuates, affecting its operating performance. Using a thermally conductive material to make the frame 312 effectively balances the pressure inside the speaker 3, minimizing the impact of pressure fluctuations on its operating performance.

[0150] Understandably, in existing speakers, because the internal pressure changes with the movement of the diaphragm, holes are drilled in the base to release pressure and balance the internal and external pressures. However, these holes in the base make it easy for impurities, moisture, and sweat to enter the speaker, causing corrosion of the magnets in the magnetic circuit assembly and resulting in speaker performance failure. Therefore, some speakers incorporate internal devices such as dust screens to prevent the ingress of impurities and moisture, which increases the production cost of the speaker.

[0151] In this embodiment, speaker 3 utilizes a voice coil and dual-diaphragm design. The two diaphragms (i.e., first diaphragm 321 and second diaphragm 322) are connected by a single voice coil 323 and move in the same direction. Therefore, the movement of the diaphragms does not cause pressure changes within speaker 3. Furthermore, since the pressure changes caused by the heat generated by voice coil 323 are actually minimal, the internal pressure relief requirements of speaker 3 can be met simply by constructing frame 312 from a thermally conductive material. This eliminates the need for opening holes in base 31 that could allow for the ingress of impurities and moisture. This improves the dustproofing capabilities of speaker 3 while effectively reducing protection costs.

[0152] In some other embodiments, the material of the frame 312 may not be a thermally conductive material. A thermally conductive material such as a thermally conductive gel may be coated on the surface of the frame 312 to form a thermally conductive coating to dissipate the heat inside the speaker 3 and relieve pressure inside the speaker 3.

[0153] In other embodiments, the frame 312 can also be configured to ventilate the internal air pressure of the speaker 3 by only providing micropores. Since the micropores are very small, the dustproofing effect is minimal, thereby simultaneously meeting the dustproofing and heat dissipation requirements. In some embodiments, the micropore walls can be straight. In other embodiments, the micropore walls can be curved to more effectively prevent impurities, water vapor, etc. from entering the inner cavity of the speaker 3.

[0154] In some embodiments, the first cover plate 313 and the second cover plate 314 have the same structure, and the following description will be made in detail by taking the first cover plate 313 as an example.

[0155] Please refer to FIG. 14 and FIG. 15 in combination. FIG. 15 is a schematic structural diagram of the first cover plate 313 of the loudspeaker 3 shown in FIG. 12 at another angle.

[0156] In some embodiments, the first cover plate 313 may include a middle portion and an edge portion surrounding the middle portion. The edge portion is fixed to the side of the first diaphragm 321 facing away from the frame 312 to secure the first diaphragm 321 to the frame 312. The middle portion is a hollow structure 3131 to avoid the first diaphragm 321 and facilitate its vibration.

[0157] For example, the first cover plate 313 may further include an escape groove 3132, which is provided on the edge portion of the surface facing the first diaphragm 321 and communicates with the hollow structure 3131. The escape groove 3132 is used to avoid the first diaphragm 321, thereby facilitating the vibration of the first diaphragm 321. In other embodiments, the first cover plate 313 may not include the escape groove, and the width of the edge portion may be made sufficiently narrow to avoid hindering the vibration of the first diaphragm 321.

[0158] In some other embodiments, the base 31 may also include only the frame 312 , that is, the base 31 may not include the first cover plate and the second cover plate, and the first diaphragm 321 and the second diaphragm 322 may be directly fixed to the frame 312 by bonding.

[0159] It is understandable that the connection method between the second diaphragm 322 and the second cover plate 314 is the same as the connection method between the first diaphragm 321 and the first cover plate 313 , and will not be described in detail here.

[0160] Please refer to FIG. 16 , which is a schematic structural diagram of the magnetic circuit assembly 33 of the loudspeaker 3 shown in FIG. 12 in some embodiments.

[0161] In some embodiments, the magnetic circuit assembly 33 may include an upper plate 331, a magnetic steel 332, and a lower plate 334. In this embodiment, the upper plate 331 is fixed to one side of the magnetic steel 332, and the lower plate 334 is fixed to the side of the magnetic steel 332 facing away from the upper plate 331. In other words, the upper plate 331 and the lower plate 334 are respectively disposed on opposite sides of the magnetic steel 332. The upper plate 331 and the lower plate 334 can be fixed to the opposite sides of the magnetic steel 332 by bonding.

[0162] Among them, the upper clamping plate 331 includes a first upper clamping plate 3311 and a second upper clamping plate 3312 arranged at intervals, the magnet 332 includes a first sub-magnet 3321 and a second sub-magnet 3322 arranged at intervals, and the lower clamping plate 334 includes a first lower clamping plate 3341 and a second lower clamping plate 3342 arranged at intervals, the first upper clamping plate 3311 and the first lower clamping plate 3341 are respectively fixed on the opposite sides of the first sub-magnet 3321, and the second upper clamping plate 3312 and the second lower clamping plate 3342 are respectively fixed on the opposite sides of the second sub-magnet 3322.

[0163] It is understood that the first upper plate 3311 of the upper plate 331, the first sub-magnet 3321 of the magnetic steel 332, and the first lower plate 3341 of the lower plate 334 collectively form the first portion of the magnetic circuit assembly 33. The second upper plate 3312 of the upper plate 331, the second sub-magnet 3322 of the magnetic steel 332, and the second lower plate 3342 of the lower plate 334 collectively form the second portion of the magnetic circuit assembly 33. The first portion and the second portion are both mounted within the frame 312, and are spaced relative to each other, forming a magnetic gap 333 between the first portion and the second portion.

[0164] The first and second parts are both magnetic, and the two opposing surfaces of the first and second parts have opposite magnetic properties. That is, the two opposing surfaces of the first sub-magnetic steel 3321 and the second sub-magnetic steel 3322 have opposite magnetic properties. For example, the portion of the first sub-magnetic steel 3321 near the first upper clamping plate 3311 is an N pole, and the portion of the first sub-magnetic steel 3321 near the first lower clamping plate 3341 is an S pole. Correspondingly, the portion of the second sub-magnetic steel 3322 near the second upper clamping plate 3312 is an S pole, and the portion of the second sub-magnetic steel 3322 near the second lower clamping plate 3342 is an N pole. Of course, the portion of the first sub-magnetic steel 3321 near the first upper clamping plate 3311 can also be an S pole, and the portion of the first sub-magnetic steel 3321 near the first lower clamping plate 3341 can also be an N pole. Correspondingly, the portion of the second sub-magnetic steel 3322 near the second upper clamping plate 3312 is an N pole, and the portion of the second sub-magnetic steel 3322 near the second lower clamping plate 3342 is an S pole.

[0165] The first part can be mounted in the first slot 3123 of the frame 312 by bonding, and the second part can be mounted in the second slot 3124 of the frame 312 by bonding. It is understood that the first slot 3123 and the second slot 3124 mainly limit the first and second parts.

[0166] It is understood that the magnetic circuit assembly 33 in this embodiment comprises two magnetic circuits (i.e., a first portion and a second portion). The magnetic circuit assembly 33 and the voice coil 323 form a horizontal dual-magnetic circuit structure consisting of a magnetic circuit, a voice coil, and a magnetic circuit. Compared to existing speakers with three or five magnetic circuits, the speaker 3 in this embodiment has a simplified magnetic circuit system, resulting in a smaller width, making it suitable for narrower product forms.

[0167] In some embodiments, the material of the upper clamping plate 331 and the lower clamping plate 334 can also be a magnetic conductive material to enhance the overall magnetic field strength of the magnet, so that the size of the magnet 332 under the same magnetic field strength conditions can be smaller, which is conducive to the miniaturization of the entire speaker 3.

[0168] In other embodiments, the connection between the first sub-magnetic steel 3321 and the first upper clamping plate 3311 and the first lower clamping plate 3341 may be other than bonding. Alternatively, the materials of the upper clamping plate 331 and the lower clamping plate 334 may not be magnetically conductive. This application does not limit the connection method and materials of the magnetic steel 332, the upper clamping plate 331, and the lower clamping plate 334.

[0169] In some other embodiments, the magnetic circuit assembly 33 may also include only magnetic steel without the upper clamping plate and the lower clamping plate. Alternatively, the magnetic circuit assembly may also include magnetic steel 332 and one of the upper clamping plate 331 or the lower clamping plate 334.

[0170] Please refer to Figures 17 and 18 in combination. Figure 17 is a structural diagram of the vibration component 32 of the speaker 3 shown in Figure 12 in some embodiments, and Figure 18 is a cross-sectional structural diagram of the speaker 3 shown in Figure 12 in the CC direction.

[0171] In some embodiments, the voice coil 323 may include a first side portion 3231 and a second side portion 3232 disposed in opposite directions. It is understood that when the voice coil 323 is energized, current flows through the first side portion 3231, the second side portion 3232, and the first side portion 3231, the second side portion 3232. The first side portion 3231 and the second side portion 3232 are both parallel to the central axis of the voice coil 323. The first side portion 3231 is connected to the first diaphragm 321, and the second side portion 3232 is connected to the second diaphragm 322. In other words, the voice coil 323 is perpendicular to the first diaphragm 321 and the second diaphragm 322. This reduces the width of the voice coil 323 in the speaker 3, facilitating miniaturization of the speaker 3 and making it more suitable for elongated products. For example, when the speaker 3 in this embodiment is used in an existing, relatively large reading pen, the width of the reading pen can be effectively reduced, making the pen closer to the size of a conventional signature pen.

[0172] Exemplarily, the number of voice coils 323 in the vibration assembly 32 can be two. The magnetic gap 333 extends along the length direction of the speaker 3, and the two voice coils 323 are arranged in the magnetic gap 333 at intervals horizontally along the length direction of the speaker 3, and the shapes of the two voice coils 323 are exactly the same. Among them, the length direction of the speaker 3 is the Y-axis direction of Figure 18. The first side portions 3231 of the two voice coils 323 are both connected to the first diaphragm 321, and the second side portions 3232 of the two voice coils 323 are both connected to the second diaphragm 322. In other words, the two voice coils 323, the first diaphragm 321 and the second diaphragm 322 form a vibrating whole. When the voice coils 323 are energized, the two voice coils 323 are both subjected to the Lorentz force in the same direction, and both push the first diaphragm 321 and the second diaphragm 322 to move back and forth.

[0173] It is understandable that the horizontally arranged dual voice coil design fully utilizes the space along the length of the loudspeaker 3. Furthermore, given the same length, using only one voice coil would reduce dimensional accuracy due to the excessively long aspect ratio of the voice coil during winding, resulting in unbalanced force on the voice coil during vibration and polarization. However, the dual voice coil design allows for the design of multiple voice coils 323 with a more appropriate aspect ratio, tailored to the actual length of the loudspeaker 3, to form a vibrating assembly. This improves the stability of the vibrating assembly 32 during vibration and improves the yield of the voice coils 323.

[0174] In other embodiments, the number of voice coils 323 in the vibration assembly 32 may be one or more, and the multiple voice coils 323 may be spaced apart in the magnetic gap 333. The shapes of the multiple voice coils 323 may be identical or different. This application does not limit the specific number and shape of the voice coils 323.

[0175] Referring again to Figures 14 and 17 , in some embodiments, the first diaphragm 321 and the second diaphragm 322 can be symmetrically arranged relative to the magnetic circuit assembly 33. Because the first diaphragm 321 and the second diaphragm 322 are driven by the same voice coil 323 and are symmetrically arranged relative to the magnetic circuit assembly 33, the vibration consistency of the first diaphragm 321 and the second diaphragm 322 is improved. The sound waves emitted by the first diaphragm 321 and the second diaphragm 322 (i.e., the first sound wave and the second sound wave) are opposite in phase (i.e., the phase difference is 180°) and have equal amplitudes. In other words, the speaker 3 is a dipole speaker in this case, which can form a dipole sound field.

[0176] When the speaker 3 emits sound, two sounds with opposite phases and equal amplitudes are emitted from the first diaphragm 321 and the second diaphragm 322, respectively, and transmitted to the outside of the speaker 3. For example, the sound emitted from the first diaphragm 321 is transmitted to the outside of the temple 12 through the first sound outlet hole 13 via the first channel 1228, and the sound emitted from the second diaphragm 322 is transmitted to the outside of the temple 12 through the second sound outlet hole 14 via the second channel 1229.

[0177] In this embodiment, a figure-8 directivity characteristic is provided around the first diaphragm 321 and the second diaphragm 322. Based on the dipole principle, by placing the human ear in the effective listening area and ensuring that the first diaphragm 321 and the second diaphragm 322 have low loudness, the wearer's hearing needs can be met. When sound is transmitted to a distant location, the two equal-amplitude, anti-phase sound waves cancel each other out in the far field, forming a sound-absorbing region and achieving far-field sound attenuation. Furthermore, because the speaker 3 in this embodiment employs a voice coil and dual-diaphragm design, the diaphragm can have a larger diaphragm, providing greater loudness.

[0178] In some embodiments, as shown in FIG18 , the edges of the first diaphragm 321 and the second diaphragm 322 may further include a folded ring portion, which may be designed as a semicircular arc to increase displacement in the vibration direction. In actual use, other effective means of increasing displacement may be used, such as an elliptical folded ring portion, or the first diaphragm 321 / the second diaphragm 322 may be made of a material with a high elastic modulus. Of course, in other embodiments, the first diaphragm 321 or the second diaphragm 322 may not include a folded ring portion. This application does not limit the shapes of the first diaphragm 321 and the second diaphragm 322.

[0179] In some embodiments, as shown in FIG18 , the vibration assembly 32 may further include a dome 324. There may be two domes 324, each covering the surface of the first diaphragm 321 and the second diaphragm 322 on the side close to the voice coil 323 to increase the rigidity of the first diaphragm 321 and the second diaphragm 322. It is understood that the dome 324 is an additional component of the vibration assembly 32. Of course, the two domes 324 may also cover the surface of the first diaphragm 321 and the second diaphragm 322 on the side away from the voice coil 323.

[0180] In some other embodiments, the dome 324 may also cover only the surface of one of the first diaphragm 321 or the second diaphragm 322 to increase rigidity, for example, covering the surface of the first diaphragm 321 close to or away from the voice coil 323 .

[0181] Please refer to FIG. 19 , which is a schematic cross-sectional view of another embodiment of the loudspeaker 3 shown in FIG. 12 in the CC direction.

[0182] The structure of this embodiment is substantially the same as that of the embodiment shown in FIG. 18 , and the common parts are not further described. The difference is that, in this embodiment, the vibration assembly 32 further includes a first connector 325 and a second connector 326. The first connector 325 and the second connector 326 have the same shape and can be made of a hard material such as plastic or metal. One side of the first connector 325 is connected to the first diaphragm 321, and the other side of the first connector 325, facing away from the first diaphragm 321, is connected to the first side 3231 of the two voice coils 323. One side of the second connector 326 is connected to the second diaphragm 322, and the other side of the second connector 326, facing away from the second diaphragm 322, is connected to the second side 3232 of the voice coils 323. In other words, the two voice coils 323 are connected to the first diaphragm 321 and the second diaphragm 322, respectively, via the first connector 325 and the second connector 326. This positions the voice coils 323 in a position that is optimal for receiving force within the magnetic gap, ensuring that the voice coils 323 are well-stressed.

[0183] At the same time, the two voice coils 323 are connected to the first diaphragm 321 and the second diaphragm 322 via a first connector 325 and a second connector 326, respectively, forming a vibrating whole. This prevents manufacturing errors from causing the two voice coils 323 to move in unison, resulting in unbalanced force on the left and right diaphragms and affecting the vibration stability of the vibration assembly 32. Furthermore, the first connector 325 and the second connector 326, respectively connecting the two voice coils 323 to their corresponding diaphragms, increase the stiffness between the voice coils 323 and the diaphragms, thereby improving the vibration stability of the vibration assembly 32.

[0184] In addition, connecting parts (first connecting part 325 or second connecting part 326) are provided on both sides of the voice coil 323 to ensure the structural symmetry of the vibration component 32 relative to the two sides of the voice coil 323, so that the upper and lower vibration stiffness of the vibration component 32 are symmetrical, further improving the vibration stability of the vibration component 32.

[0185] In other embodiments, the vibration assembly 32 may include only one connector, one connector connected between the voice coil and the first diaphragm, or one connector connected between the voice coil and the second diaphragm. This application does not limit the specific number and shape of the connectors. In other embodiments, the shapes of the first connector 325 and the second connector 326 may be different.

[0186] Please refer to FIG. 20 , which is a schematic cross-sectional view of another embodiment of the loudspeaker 3 shown in FIG. 12 in the CC direction.

[0187] The structure of this embodiment is substantially the same as that of the embodiment shown in FIG19 , and the common parts are not further described. The difference is that in this embodiment, the vibration assembly 32 further includes a support member 327. Two support members 327 may be provided, one of each being disposed within the two voice coils 323 of the vibration assembly 32, with one end connected to the first side portion 3231 and the other end connected to the second side portion 3232, thereby supporting the first side portion 3231 and the second side portion 3232 of the voice coil 323. In other embodiments, the number of support members may be one or more, or multiple support members may be provided within a single voice coil.

[0188] It is understandable that because the voice coil 323 is a hollow structure, when the voice coil 323 is energized and the Lorentz force cuts the magnetic flux lines, pushing the first diaphragm 321 and the second diaphragm 322 to vibrate, the voice coil 323 is susceptible to deformation in the vibration direction (first direction), affecting the vibration stability of the vibration assembly 32 and reducing the operating performance of the vibration assembly 32. In this embodiment, by providing a support member 327 within the voice coil 323, the rigidity of the voice coil 323 is increased, and the deformation of the voice coil 323 in the first direction during vibration is reduced, thereby reducing the performance loss caused by deformation during vibration and improving the operating efficiency of the speaker 3.

[0189] In some other embodiments, the voice coil 323 may be wound around the support member 327 to enhance the rigidity of the voice coil 323 and reduce deformation. The support member 327 may be made of a hard material such as metal or liquid crystal polymer (LPC). This application does not limit the material of the support member 327 or the connection method between the support member 327 and the voice coil 323.

[0190] Please refer to Figures 21 to 24. Figure 21 is a structural schematic diagram of another embodiment of the speaker 3 shown in Figure 6, Figure 22 is a cross-sectional structural schematic diagram of the speaker 3 shown in Figure 21 in the DD direction, Figure 23 is a structural schematic diagram of a partial structure of the speaker 3 shown in Figure 21, and Figure 24 is a cross-sectional structural schematic diagram of the speaker 3 shown in Figure 21 in the EE direction.

[0191] The structure of this embodiment is substantially the same as that of the embodiment shown in FIG20 , and the same parts are not repeated here. The difference is that in this embodiment, the frame 312 can also include a first basin frame 3126 and a second basin frame 3127. The first basin frame 3126 and the second basin frame 3127 are both hollow structures with openings on both sides. The first basin frame 3126 and the second basin frame 3127 are stacked and connected to form the frame 312.

[0192] In some embodiments, the openings on both sides of the first basin rack 3126 are both first openings 3122, and the openings on both sides of the second basin rack 3127 are both second openings 3123. When the first basin rack 3126 and the second basin rack 3127 are stacked and connected, one of the first openings 3122 of the first basin rack 3126 is docked with one of the second openings 3123 of the second basin rack 3127, so that the space enclosed by the first basin rack 3126 and the second basin rack 3127 is connected.

[0193] The first diaphragm 321 covers the first opening 3122 of the first frame 3126 facing away from the second frame 3127. The first cover plate 313 secures the first diaphragm 321 to the first frame 3126. The second diaphragm 322 covers the second opening 3123 of the second frame 3127 facing away from the first frame 3126. The second cover plate 314 secures the second diaphragm 322 to the second frame 3127. In this embodiment, the above components are all secured together by bonding. Of course, in other embodiments, the above components may also be connected by other connection methods such as clamping, welding, or bolting.

[0194] It can be understood that the speaker 3 of the present application is provided with a first basin frame 3126 and a second basin frame 3127, and the two are connected to form a frame 312, so as to facilitate the assembly of the magnetic circuit component 33 and other internal components of the speaker 3.

[0195] In this embodiment, as shown in FIG22 , the first basin frame 3126 may further include a first stopper 60 disposed on the inner wall of the first basin frame 3126, and the second basin frame 3127 may further include a second stopper 70 disposed on the inner wall of the second basin frame 3127 and disposed opposite the first stopper 60. The magnetic circuit assembly 33 is fixed inside the frame 312. For example, the magnetic circuit assembly 33 may be limited inside the frame 312 by the first stopper 60 and the second stopper 70, so that the magnetic circuit assembly 33 is stably fixed to the frame 312.

[0196] Of course, in some other embodiments, the first basin frame 3126 may not include the first limiting block, and the second basin frame 3127 may not include the second limiting block. The magnetic circuit assembly 33 may also be fixed to the frame 312 by bonding, bolting, or other connection methods. This application does not limit the connection method between the magnetic circuit assembly 33 and the frame 312. Alternatively, the frame 312 may include other limiting structures in addition to the first limiting block and the second limiting block to limit the magnetic circuit assembly 33 to be fixed to the frame 312.

[0197] In this embodiment, as shown in Figure 21 , the first frame 3126 is further provided with an extension section 3128. In this embodiment, there are two extension sections 3128, spaced apart on one side of the first frame 3126. These two extension sections 3128 are used to support other components of the speaker 3. Of course, in other embodiments, the number of extension sections 3128 may be one or more. Alternatively, the first frame 3126 may be provided with no extension sections.

[0198] As shown in Figures 22 to 24, the vibration component 32 also includes a connecting circuit. In this embodiment, the connecting circuit is a flexible printed circuit (FPC) 328. The flexible printed circuit 328 is a ring-shaped structure. The flexible printed circuit 328 includes an inner side and an outer side. The inner side is electrically connected to the voice coil 323, and part of the outer side is fixed to the connection between the first basin frame 3126 and the second basin frame 3127 by bonding. In other words, the flexible printed circuit 328 is clamped between the first basin frame 3126 and the second basin frame 3127 to facilitate the assembly of the flexible printed circuit 328. Compared with the traditional speaker electrically connected to the circuit board of the electronic device through the voice coil lead-out line, the present application improves the electrical stability of the speaker 3 by providing a flexible printed circuit 328 to electrically connect the circuit board 40 of the electronic device 1000.

[0199] As shown in Figures 21, 23, and 24, the flexible circuit board 328 further includes two extension sections 3281. The two extension sections 3281 cover the surfaces of the two extension sections 3128 of the first frame 3126 on the side facing the second frame 3127. The two extension sections 3281 are used to connect to an external circuit, for example, they can be used to electrically connect to the circuit board 40 of the electronic device 1000.

[0200] Please refer to FIG. 25 , which is a schematic structural diagram of a portion of the structure of the speaker 3 shown in FIG. 21 in other embodiments.

[0201] In some embodiments, the connecting lines can also be wires. For example, copper wires 43 can be printed on the surface of the first diaphragm 321 to serve as a line lead-out solution, replacing the flexible circuit board, thereby reducing the vibration mass of the vibration assembly 32 and improving the vibration performance of the vibration assembly 32. Of course, in other embodiments, lines can also be etched on the first diaphragm 321 as a line lead-out solution, or the connecting lines can be provided on the second diaphragm 322. This application does not limit the line lead-out solution.

[0202] Please refer to FIG. 26 , which is a schematic cross-sectional view of another embodiment of the loudspeaker 3 shown in FIG. 12 taken along the BB direction.

[0203] The loudspeaker 3 in this embodiment is substantially the same as the loudspeaker 3 shown in FIG12 , and the identical parts will not be described in detail. The difference is that a magnetic fluid 335 may also be provided in the magnetic gap 333 of the magnetic circuit assembly 33 in this embodiment. Specifically, the magnetic fluid 335 is a functional material that has both the fluidity of a liquid and the magnetism of a solid magnetic material. When the magnetic fluid 335 is in a static state, there is no magnetic attraction. When an external magnetic field acts, the magnetic fluid 335 exhibits magnetism. Therefore, when the magnetic fluid 335 is filled in the magnetic gap 333, since the magnetic steel 332 generates a magnetic field, the magnetic fluid 335 will be adsorbed in the magnetic gap 333 and will not drip.

[0204] During the vibration process of the vibration component 32, when the voice coil 323 is energized and moves in a direction perpendicular to the first diaphragm 321 (i.e., the first direction) to cut the magnetic flux lines under the action of the Lorentz force, the voice coil 323 will also generate vibrations in a direction other than the first direction, and generate displacement or tilt in a direction other than the first direction. The voice coil 323 may collide with the magnet 332 during the vibration process.

[0205] In this embodiment, magnetic fluid 335 is filled in the magnetic gap 333. Due to its fluidity, when the voice coil 323 is positioned in the magnetic gap 333, the magnetic fluid 335 can envelop the portion of the voice coil 323 that extends into the magnetic gap 333. When the voice coil 323 vibrates in a direction other than the first direction during vibration, the magnetic fluid 335 restricts the displacement or tilt of the voice coil 323 in the non-first direction, thereby reducing the displacement or tilt of the voice coil 323 in the non-first direction. Furthermore, due to the fluidity of the magnetic fluid 335, the restriction of the voice coil 323 by the magnetic fluid 335 does not affect the movement of the voice coil 323, thereby ensuring smoother vibration of the voice coil 323 and preventing collision with the magnet 332. This enhances the vibration stability of the vibration assembly 32.

[0206] On the other hand, existing speaker designs often use a wide magnetic gap to prevent the voice coil from colliding with the magnet, hindering overall speaker miniaturization. This embodiment, however, addresses this issue by filling magnetic gap 333 with a magnetic fluid 335. Consequently, the width of magnetic gap 333 can be further reduced in the design of speaker 3, increasing the strength of the magnetic field and improving the operating efficiency of speaker 3. Furthermore, the reduction in magnetic gap 333 improves the overall integration of speaker 3, facilitating overall speaker miniaturization.

[0207] Please refer to Figures 27, 28 and 29. Figure 27 is a structural diagram of another embodiment of the speaker 3 shown in Figure 6, Figure 28 is a partial structural decomposition diagram of the speaker 3 shown in Figure 27, and Figure 29 is a cross-sectional structural diagram of the speaker 3 shown in Figure 27 in the FF direction.

[0208] In some embodiments, the speaker 3 may include a base 31, a vibration assembly 32, and a magnetic circuit assembly 33. The base 31 is a hollow structure with openings on both sides and has an inner cavity 311. The magnetic circuit assembly 33 is disposed in the inner cavity 311. The magnetic circuit assembly 33 has a magnetic gap 333. The vibration assembly 32 may include a first diaphragm 321, a second diaphragm 322, and a voice coil 323. The edge of the first diaphragm 321 is connected to the opening on one side of the base 31, and the edge of the second diaphragm 322 is connected to the opening on the other side of the base 31 facing away from the first diaphragm 321. The edges of the first diaphragm 321 and the second diaphragm 322 are both fixed to the base 31 by bonding to seal the inner cavity 311. The voice coil 323 is located in the magnetic gap 333, and its two sides are respectively connected to the first diaphragm 321 and the second diaphragm 322.

[0209] When power is applied to the voice coil 323, the magnetic field forces it to generate a Lorentz force in a first direction, causing it to cut through the magnetic flux lines in that direction. This force pushes the first diaphragm 321 and the second diaphragm 322 to move back and forth in that direction. In other words, when power is applied to the voice coil 323, the voice coil 323, the first diaphragm 321, and the second diaphragm 322 all move together in the same direction as a whole.

[0210] In this embodiment, the vibration assembly 32 includes two voice coils 323, which are horizontally arranged and spaced apart in the magnetic gap 333 of the magnetic circuit assembly 33. The voice coils 323 include a first end surface 3234 and a second end surface 3235, which are arranged in opposite directions. The first end surface 3234 and the second end surface 3235 are both perpendicular to the central axis of the voice coil 323. That is, the plane in which the voice coils 323 are wound is parallel to the first end surface 3234 and the second end surface 3235. The first end surface 3234 of the two voice coils 323 is connected to the first diaphragm 321, and the second end surface 3235 of the two voice coils 323 is connected to the second diaphragm 322. In other words, the two voice coils 323 are arranged parallel to the first diaphragm 321.

[0211] The first end surface 3234 is located in the magnetic gap 333 , and the second end surface 3235 is located outside the magnetic gap 333 , so that the second end surface 3235 is connected to the second diaphragm 322 .

[0212] It can be understood that the speaker 3 in this embodiment has the voice coil 323 arranged parallel to the first diaphragm 321, so that the speaker 3 can make full use of the horizontal space and reduce the thickness of the speaker 3, so that it can be adapted to electronic devices with ultra-thin designs such as mobile phones and tablets.

[0213] In some other embodiments, the base 31 may further include a first cover plate and a second cover plate. The first diaphragm 321 covers an opening on one side of the base 31, and the first cover plate secures the first diaphragm 321 to the base 31. The second diaphragm 322 covers an opening on a side of the base 31 away from the first diaphragm 321, and the second cover plate secures the second diaphragm 322 to the base 31. This application does not limit the connection method between the first diaphragm 321, the second diaphragm 322, and the base 31.

[0214] Please refer to FIG. 28 and FIG. 30 . FIG. 30 is a schematic structural diagram of the magnetic circuit assembly 33 of the loudspeaker 3 shown in FIG. 27 .

[0215] In some embodiments, the magnetic circuit assembly 33 may include a first magnetic circuit assembly 34, a second magnetic circuit assembly 35, and a connecting plate 36. The first magnetic circuit assembly 34 and the second magnetic circuit assembly 35 are fixed to the connecting plate 36, which is fixed inside the base 31. The first magnetic circuit assembly 34 and the second magnetic circuit assembly 35 are arranged horizontally and spaced apart along the length of the speaker 3 within the inner cavity 311. The first magnetic circuit assembly 34 and the second magnetic circuit assembly 35 are respectively fixed to the connecting plate 36 by bonding. It is understood that the first magnetic circuit assembly 34 and the second magnetic circuit assembly 35 are indirectly fixed to the inside of the base 31 via the connecting plate 36.

[0216] In some embodiments, the connecting plate 36 can be fixed to the inside of the base 31 by bonding. Of course, in other embodiments, the connecting plate 36 can also be fixed to the inside of the base 31 by means of inlaying, screwing, clamping, welding, etc. In other embodiments, the first magnetic circuit assembly 34 and the second magnetic circuit assembly 35 can also be fixed to the connecting plate 36 by means of bonding, clamping, screwing, etc. This application does not limit the connection method between the connecting plate 36 and the base 31 and the first magnetic circuit assembly 34, the second magnetic circuit assembly 35 and the connecting plate.

[0217] In some embodiments, the magnetic circuit assembly 33 further includes an avoidance hole 361. In this embodiment, the avoidance hole 361 can be provided on the connecting plate 36. For example, the avoidance hole 361 is provided on the connecting plate 36 and passes through the surfaces on both sides of the connecting plate 36. The avoidance hole 361 includes a middle avoidance hole 362 and two edge avoidance holes 363 located on the left and right sides of the middle avoidance hole 362. In some embodiments, the middle avoidance hole 362 is provided at the interval between the two voice coils 323 on the connecting plate 36, that is, the center of the middle avoidance hole 362 is located at the center of the interval between the two voice coils 323. In other words, the middle avoidance hole 362 is located above the interval between the two voice coils 323. The two edge avoidance holes 363 are respectively located on the side of the first magnetic circuit assembly 34 away from the second magnetic circuit assembly 35 and on the side of the second magnetic circuit assembly 35 away from the first magnetic circuit assembly 34.

[0218] In some embodiments, the first magnetic circuit component 34 and the second magnetic circuit component 35 have the same structure, and the following description will be made in detail by taking the first magnetic circuit component 34 as an example.

[0219] Illustratively, the first magnetic circuit assembly 34 includes a first magnetic conductive plate 341 and a first magnetic steel 342. The first magnetic conductive plate 341 is connected to a surface on one side of the first magnetic steel 342, and the other surface of the first magnetic steel 342 away from the first magnetic conductive plate 341 is fixed to the connecting plate 36. In other words, the first magnetic steel 342 is sandwiched between the first magnetic conductive plate 341 and the connecting plate 36. In some embodiments, the first magnetic steel 342 can be fixed to the connecting plate 36 by bonding, snapping, screwing, or other connection methods, and the first magnetic conductive plate 341 can be fixed to the first magnetic steel 342 by bonding, snapping, screwing, or other connection methods. This application does not limit the connection method between the above components.

[0220] In some embodiments, the material of the first magnetic conductive plate 341 can also be a magnetic conductive material to enhance the overall magnetic field strength of the first magnetic circuit assembly 34, so that the size of the first magnetic steel 342 can be smaller under conditions of equal magnetic field strength, which is conducive to the miniaturization of the entire speaker 3. Of course, in some other embodiments, the first magnetic circuit assembly 34 may not include the first magnetic conductive plate.

[0221] In this embodiment, the first magnetic steel 342 may include a central magnetic steel 3314 and edge magnetic steels 3315 disposed on either side of the central magnetic steel 3314. The central magnetic steel 3314 and the two edge magnetic steels 3315 are spaced apart to form a first magnetic gap 3331. The first magnetic gap 3331 is connected to the corresponding middle avoidance hole 362 and edge avoidance hole 363. One of the voice coils 323 of the vibration assembly 32 is disposed in the first magnetic gap 3331, so that the voice coil 323 can achieve magnetic flux cutting motion in a first direction when energized. This application does not limit the specific structure and shape of the first magnetic steel 342.

[0222] The first magnetic conductive plate 341 includes a middle magnetic conductive plate 342 and edge magnetic conductive plates 343 disposed on either side of the middle magnetic conductive plate 342. The middle magnetic conductive plate 342 is fixed to the surface of the center magnetic steel 3314 facing away from the connecting plate 36, and the two edge magnetic conductive plates 343 are respectively fixed to the surfaces of the two edge magnetic steels 3315 facing away from the connecting plate 36.

[0223] In an implementation scenario of some embodiments, in order to further enhance the strength of the magnetic field and improve the working efficiency of the speaker 3, the material of the connecting plate 36 can also be a magnetic conductive material, that is, the first magnetic steel 342 is sandwiched between two magnetic conductive materials, and the two magnetic conductive materials act together on the first magnetic steel 342, so that the magnetic field strength of the first magnetic steel 342 is increased. Under the same magnetic field strength conditions, the size of the first magnetic steel 342 can be made smaller, which is conducive to the miniaturization of the entire speaker 3.

[0224] As shown in Figure 30, the second magnetic circuit assembly 35 may also include a second magnetic steel 351 and a second magnetic conductive plate 352. It is understandable that the structure of the second magnetic steel 351 and the second magnetic conductive plate 352 and the assembly method with the connecting plate 36 are respectively the same as the structure of the first magnetic steel 342 and the first magnetic conductive plate 341 and the assembly method with the connecting plate 36, and no further details are given. The second magnetic steel 351 is provided with a second magnetic gap 3332, and the second magnetic gap 3332 is connected to the corresponding middle avoidance hole 362 and edge avoidance hole 363. The other voice coil 323 of the vibration assembly 32 is provided in the second magnetic gap 3332, so that the voice coil 323 can achieve the motion of cutting the magnetic flux lines in the first direction after being energized.

[0225] In some other embodiments, the first magnetic gap 3331 and the second magnetic gap 3332 of the magnetic circuit assembly 33 may be filled with magnetic fluid 335. Alternatively, one of the first magnetic gap 3331 and the second magnetic gap 3332 may be filled with magnetic fluid 335.

[0226] In some other embodiments, the number of voice coils can be multiple, and correspondingly, the number of magnetic gaps can also be multiple. The multiple magnetic gaps are arranged at intervals along the length direction of the speaker 3, and the multiple voice coils are located in the multiple magnetic gaps one by one.

[0227] Please refer to FIG. 28 , FIG. 29 and FIG. 31 . FIG. 31 is a schematic structural diagram of the third connecting member 37 shown in FIG. 28 .

[0228] In some embodiments, the vibration assembly 32 may further include a third connecting member 37. In this embodiment, there are two third connecting members 37, and the two third connecting members 37 are respectively arranged between the first diaphragm 321 and the two voice coils 323. That is, one third connecting member 37 is arranged between one of the voice coils 323 and the first diaphragm 321, and the other third connecting member 37 is arranged between the other voice coil 323 and the first diaphragm 321. One end of the third connecting member 37 is connected to the first diaphragm 321, and the other end extends to the magnetic gap 333 and connects to the first end surface 3234. The third connecting member 37 includes a fitting portion 371 and an extension portion 372. In this embodiment, the fitting portion 371 includes a mounting side, and there are two extension portions 372, which are connected to opposite ends of the mounting side. In this embodiment, the fitting portion 371 and the two extension portions 372 are an integrally formed structure to ensure the strength of the third connecting member 37.

[0229] In some other embodiments, the fitting portion 371 and the two extension portions 372 may be fixed by connection. The number of the extension portions 372 may also be one or more.

[0230] For example, the fitting portion 371 of one of the third connecting members 37 is connected to the first diaphragm 321, and the two extension portions 372 pass through the edge avoidance hole 363 and the middle avoidance hole 362, respectively, and are connected to the two ends of the first end surface 3234 of the voice coil 323. The connection method of the other third connecting member 37 to the first diaphragm 321 and the other voice coil 323 is the same as the above-mentioned connection method and will not be repeated. In other words, the voice coil 323, the third connecting member 37, the first diaphragm 321 and the second diaphragm 322 together form a vibrating whole. When the voice coil 323 is energized and moves to cut the magnetic flux lines, on the one hand, it pushes the second diaphragm 322 to move back and forth, and on the other hand, it pushes the third connecting member 37 to push the first diaphragm 321 and the second diaphragm 322 to move back and forth in the same direction.

[0231] By setting a third connecting member 37 between the voice coil 323 and the first diaphragm 321, and setting an avoidance hole that cooperates with the third connecting member 37 on the connecting plate 36 of the magnetic circuit assembly 33, the voice coil 323 can pass through the magnetic circuit assembly 33 and be connected to the first diaphragm 321 through the third connecting member 37, so that the voice coil 323 is connected between the first diaphragm 321 and the second diaphragm 322, so that the first diaphragm 321, the second diaphragm 322 and the voice coil 323 form a voice coil-dual diaphragm structure, and have consistency during movement, thereby ensuring the symmetry of the upper and lower vibration stiffness of the vibration assembly 32, improving the vibration stability of the entire vibration assembly 32, and more effectively improving the polarization phenomenon. It improves the vibration balance of the vibration assembly 32 under large amplitude conditions, avoids hitting the magnetic circuit assembly and generating noise, and enables the speaker 3 to achieve the expected amplitude setting value in actual operation. Since the loudness of the speaker 3 is determined by the vibration area and amplitude, that is, under the condition of the same effective radiation area, the speaker 3 with a voice coil-dual diaphragm design can achieve a larger amplitude and obtain a higher loudness on the basis of miniaturization, so that the loudness of the speaker 3 used in small electronic devices such as bracelets and reading pens is not constrained by space, thereby improving the wearer experience.

[0232] At the same time, since the voice coil-dual diaphragm design improves the vibration stability of the vibration component 32, the speaker 3 of the present application can achieve a larger amplitude setting value and obtain higher loudness.

[0233] In addition, there are two extension parts 372 in this embodiment, and the two extension parts 372 are respectively connected to the two ends of the first end surface 3234 of the voice coil 323, so that the connection between the voice coil 323 and the third connecting member 37 is more stable, thereby improving the vibration stability of the vibration component 32.

[0234] Exemplarily, the fitting portion 371 of the third connecting member 37 is a hollow annular structure, which is the same structure as the second end face 3235 of the voice coil 323, so that the fitting area between the fitting portion 371 and the first diaphragm 321 and the fitting area between the second end face 3235 and the second diaphragm 322 are the same, so that the fitting area of ​​the whole formed by the third connecting member 37 and the voice coil 323 is the same as that of the first diaphragm 321 and the second diaphragm 322, that is, the connection stiffness on both sides of the whole is the same, thereby improving the vibration stability in the vibration component 32.

[0235] Exemplarily, the two extensions 372 of the third connector 37 have the same shape as the portion of the voice coil 323 they contact, thereby increasing the connection area between the extensions 372 and the voice coil 323 and ensuring a secure connection between the extensions 372 and the voice coil 323. For example, if the ends of the voice coil 323 are arc-shaped, the extensions 372 also have a corresponding arc shape.

[0236] In some other embodiments, the number of the third connecting members 37 can be one or more, and the shapes of the fitting portion 371 and the extension portion 372 can also be other styles. This application does not limit the number and style of the third connecting members 37.

[0237] Please refer to Figures 32 and 33 together. Figure 32 is a structural diagram of the speaker 3 provided in this application in some embodiments, and Figure 33 is a schematic diagram of the decomposed structure of the speaker 3 shown in Figure 32.

[0238] In one embodiment, the speaker 3 may include a base 51, a vibration assembly 52, a first magnetic circuit assembly 53, and a second magnetic circuit assembly 54. The base 51 has an inner cavity 511, and the vibration assembly 52, the first magnetic circuit assembly 53, and the second magnetic circuit assembly 54 are all disposed in the inner cavity 511. The first magnetic circuit assembly 53 and the second magnetic circuit assembly 54 are respectively located on either side of the vibration assembly 52 and are symmetrically arranged relative to the vibration assembly 52.

[0239] Please refer to FIG. 34 , which is another exploded structural diagram of the speaker 3 shown in FIG. 32 .

[0240] In some embodiments, the base 51 is a roughly rectangular column. The base 51 (Figure 32) includes a frame 512, a first cover plate 513 and a second cover plate 514. The frame 512 is a hollow structure with openings on both sides. The first cover plate 513 and the second cover plate 514 respectively cover the opposite sides of the frame 512, and the three together enclose an inner cavity 511. Among them, the two openings are a first opening 5121 and a second opening 5122, respectively. The first cover plate 513 covers the first opening 5121 of the frame 512, and the second cover plate 514 covers the second opening 5122 of the frame 512. In other embodiments, the shape of the base 51 can also be a cylinder, a square cylinder or a special-shaped body.

[0241] In this embodiment, the frame 512 may include a first basin frame 5123 and a second basin frame 5124. Both the first basin frame 5123 and the second basin frame 5124 are hollow structures with openings on both sides. The first basin frame 5123 and the second basin frame 5124 are stacked and connected to form the frame 512. Specifically, the openings on both sides of the first basin frame 5123 are first openings 5121, and the openings on both sides of the second basin frame 5124 are second openings 5122. When the first basin frame 5123 and the second basin frame 5124 are stacked and connected, one of the first openings 5121 of the first basin frame 5123 mates with one of the second openings 5122 of the second basin frame 5124, thereby connecting the space enclosed by the first basin frame 5123 and the second basin frame 5124. The first cover plate 513 covers the first opening 5121 of the first basin frame 5123 facing away from the second basin frame 5124, and the second cover plate 514 covers the second opening 5122 of the second basin frame 5124 facing away from the first basin frame 5123. In this embodiment, the first basin frame 5123 and the second basin frame 5124 are fixed by bonding. Of course, in other embodiments, the first basin frame 5123 and the second basin frame 5124 can also be fixedly connected by other connection methods such as clamping and welding.

[0242] In this embodiment, the edge of the vibration assembly 52 is fixed between the first frame 5123 and the second frame 5124. In other words, the edge of the vibration assembly 52 is sandwiched between the first frame 5123 and the second frame 5124. It will be appreciated that the frame 512 is composed of two parts (the first frame 5123 and the second frame 5124) to facilitate the fixing of the vibration assembly 52 to the frame 512 and the assembly of the speaker 3. Of course, in other embodiments, the frame 512 can also be a single unit, with the first cover 513 and the second cover 514 directly covering opposite sides of the frame 512.

[0243] As shown in Figure 34, in this embodiment, the first magnetic circuit component 53 can be fixed to the first cover plate 513, and the second magnetic circuit component 54 can be fixed to the second cover plate 514. The first magnetic circuit component 53 and the second magnetic circuit component 54 can be symmetrically arranged with respect to the vibration component 52. For example, the vibration component 52 has a diaphragm 521, and the first magnetic circuit component 53 and the second magnetic circuit component 54 are respectively located on opposite sides of the diaphragm 521. The first magnetic circuit component 53 and the second magnetic circuit component 54 are mirror-symmetrical on opposite sides of the diaphragm 521, and the diaphragm 521 can be understood as a mirror surface. It can be understood that when the first magnetic circuit component 53 and the second magnetic circuit component 54 are mirror-symmetrical on opposite sides of the diaphragm 521, the first distance from the side of the first magnetic circuit component 53 closest to the diaphragm 521 to the diaphragm 521 is equal to or approximately equal to the second distance from the side of the second magnetic circuit component 54 closest to the diaphragm 521 to the diaphragm 521. When the first distance is approximately equal to the second distance, the difference between the first distance and the second distance is less than 0.05 mm. The first magnetic circuit assembly 53 and the second magnetic circuit assembly 54 can be fixed to the first cover plate 513 and the second cover plate 514 respectively by one or more connection methods such as bonding, clamping, and screwing.

[0244] In this embodiment, the first cover plate 513 is provided with at least one first sound outlet hole 5131 passing through its two opposite surfaces, and the second cover plate 514 is provided with a second sound outlet hole 5141 passing through its two opposite surfaces. The first sound outlet hole 5131 and the second sound outlet hole 5141 are symmetrically arranged relative to the vibration component 52, and both are connected to the inner cavity 511 of the base 51. When the speaker 3 is working, the sound waves on the upper side of the vibration component 52 are transmitted to the outside through the first sound outlet hole 5131, and the sound waves on the lower side of the vibration component 52 are transmitted to the outside through the second sound outlet hole 5141. The symmetrical arrangement of the first sound outlet hole 5131 and the second sound outlet hole 5141 makes the transmission positions of the sound waves on the upper and lower sides of the vibration component 52 the same, so that the superposition and cancellation effect of the sound waves on both sides of the speaker 3 is better.

[0245] In this embodiment, the first sound outlet 5131 may include at least one first opening 15, at least one second opening 16, and at least one third opening 17. The third opening 17 is located in the center of the first cover plate 513. The first opening 15 and the second opening 16 are symmetrical with respect to the third opening 17. Alternatively, the first opening 15, the second opening 16, and the third opening 17 are symmetrically arranged relative to the center of the first cover plate 513. Because the vibration assembly 52 is affected by frontal air damping during vibration, to ensure a more stable sound field during vibration, the first opening 15, the second opening 16, and the third opening 17 of the first sound outlet 5131 are arranged symmetrically relative to the center of the first cover plate 513. This ensures that the sound waves generated by the left and right sides of the vibration assembly 52 reach the same distance from the two openings, and the air damping on both sides is the same, thereby improving the vibration synchronization and stability of the vibration assembly 52. ​​It is understood that the first opening 15, the second opening 16, and the third opening 17 may each include two small holes spaced apart.

[0246] Of course, in other embodiments, the first opening 15, the second opening 16 or the third opening 17 can also be composed of a small hole or a plurality of small holes arranged at intervals. This application does not limit the number and shape of the small holes. Alternatively, in other embodiments, the first sound outlet 5131 can also only include the first opening and the second opening, and the first opening and the second opening are symmetrical relative to the center of the first cover plate, so that the sound waves generated on the left and right sides of the vibration component 52 reach the first opening and the second opening at the same distance, and the air damping on the left and right sides is the same, thereby improving the vibration synchronization and stability of the vibration component 52.

[0247] It can be understood that the structure of the second sound hole 5141 is the same as that of the first sound hole 5131, and its position is mirror-symmetrical relative to the diaphragm 521 (or vibration component 52). Please refer to the relevant description of the first sound hole 5131 and will not be repeated here.

[0248] In this embodiment, the first basin rack 5123 and the second basin rack 5124 have the same structure, and the following description will be made in detail by taking the first basin rack 5123 as an example.

[0249] Please refer to Figures 35 and 36 together. Figure 35 is a structural diagram of the first basin frame 5123 of the speaker 3 shown in Figure 34 in some embodiments, and Figure 36 is a cross-sectional structural diagram of the speaker 3 shown in Figure 32 in the II direction.

[0250] In some embodiments, the first basin frame 5123 may include a first mounting groove 5125. The first mounting groove 5125 is located at the first opening 5121 on the side of the first basin frame 5123 facing away from the second basin frame 5124. In this embodiment, the first cover plate 513 is mounted within the first mounting groove 5125. The first mounting groove 5125 is used to both mount the first cover plate 513 and to position the first cover plate 513, ensuring a more secure fit within the first mounting groove 5125.

[0251] The first cover plate 513 can be detachably connected to the first mounting groove 5125 to facilitate maintenance of the components of the inner cavity 511. Of course, the first cover plate 513 can also be fixed to the first mounting groove 5125 in an undetachable manner.

[0252] In an implementation scenario of other embodiments, the frame 512 may not include the first mounting groove, and the first cover 513 may be fixed to the frame 512 by other connection methods such as bonding, bolting, etc. This application does not limit the fixing method between the first cover 513 and the frame 512.

[0253] It is understandable that the connection method between the second basin frame 5124 and the second cover plate 514 is the same as the connection method between the first basin frame 5123 and the first cover plate 513, and will not be repeated here.

[0254] Please refer to Figures 37 and 38 together. Figure 37 is a structural diagram of the vibration component 52 of the speaker 3 shown in Figure 32 in some embodiments, and Figure 38 is a cross-sectional structural diagram of the speaker 3 shown in Figure 32 in the GG direction.

[0255] In some embodiments, the vibration assembly 52 may include a diaphragm 521, a first voice coil 522, and a second voice coil 523. The diaphragm 521, the first voice coil 522, and the second voice coil 523 are stacked in a first direction. The diaphragm 521 includes a first surface 5211 and a second surface 5212 disposed opposite each other in the first direction. The first voice coil 522 is fixed to the first surface 5211, and the second voice coil 523 is fixed to the second surface 5212. The diaphragm 521 may be a planar diaphragm, disposed in the inner cavity 511 ( FIG. 34 ) and connected to the interior of the frame 512. In some embodiments, the periphery of the diaphragm 521 is connected between the first frame 5123 and the second frame 5124, isolating the inner cavity 511 to form a first sound cavity 5112 and a second sound cavity 5113. The first sound outlet 5131 communicates with the first sound cavity 5112, and the second sound outlet 5141 communicates with the second sound cavity 5113. The first voice coil 522 is located in the first sound cavity 5112 , and the second voice coil 523 is located in the second sound cavity 5113 . When the speaker 3 is installed in the speaker module 30 , the first sound cavity 5112 communicates with the first space 411 , and the second sound cavity 5113 communicates with the second space 412 .

[0256] There are various scenarios where the diaphragm 521 is a flat diaphragm. One scenario is that the entire diaphragm 521 is flat and has no bumps or indentations. Another scenario is that the diaphragm 521 has some bumps or indentations, but these are not noticeable and do not cause a significant difference in area between the first sound cavity 5112 and the second sound cavity 5113, thereby preventing a noticeable difference in sound production between the first sound cavity 5112 and the second sound cavity 5113. Still another scenario is when the diaphragm 521 has a spring structure, such as a folded ring structure, at its edge, the diaphragm 521 can also be considered a flat diaphragm.

[0257] It is understood that the projection of the first voice coil 522 on the first surface 5211 is annular, and the projection of the second voice coil 523 on the second surface 5212 is annular. That is, the cross-section of the first voice coil 522 is annular, and the cross-section of the second voice coil 523 is annular, with the cross-section being a plane perpendicular to the first direction. In some embodiments, the cross-section of the first voice coil 522 and / or the cross-section of the second voice coil 523 is a closed ring, such as a racetrack shape. When power is applied to the first and second voice coils 522, 523, the current flows in the same direction. Under the influence of the magnetic field, the first and second voice coils 522, 523 experience the same Lorentz force. The two voice coils generate a Lorentz force perpendicular to the plane of the diaphragm 521 (the first direction), i.e., the thickness direction of the speaker. The Lorentz force cuts through the magnetic flux lines along the thickness direction of the speaker, pushing the diaphragm 521 back and forth in this direction. The back-and-forth motion of the diaphragm 521 causes air to vibrate and produce sound. When the diaphragm 521 vibrates downward, the air below the diaphragm 521 compresses due to the reduction in air volume, while the air above the diaphragm 521 expands due to the increase in air volume. As a result, the sound waves generated on the upper and lower sides of the diaphragm 521 are in opposite phases (i.e., a phase difference of 180°). In this embodiment, the first voice coil 522 and the second voice coil 523 are simultaneously subjected to forces in the same direction, making it easier to drive the diaphragm 521 to vibrate, which is beneficial to the vibration effect.

[0258] In this embodiment, the first sound outlet 5131 and the second sound outlet 5141 of the speaker 3 can emit sound waves with equal amplitudes and opposite phases (i.e., a phase difference of 180°). In other words, the speaker 3 is a dipole speaker and can form a dipole sound field. When the speaker 3 emits sound, two sound waves with opposite phases are emitted through the first sound outlet 5131 and the second sound outlet 5141, respectively. The sound wave emitted from the first sound outlet 5131 passes through the first channel 1228 and is transmitted to the outside of the temple from the first sound outlet 13, while the sound wave emitted from the second sound outlet 5141 passes through the second channel 1229 and is transmitted to the outside of the temple 12 from the second sound outlet 14.

[0259] In this embodiment, a figure-eight directional pattern is formed around the first and second sound outlets 5131, 5141. Based on the dipole principle, this ensures that the human ear is within the effective listening area, ensuring that the first and second sound outlets 5131, 5141 have relatively low loudness, thus satisfying the wearer's auditory needs. The two sound waves cancel each other out in the far field, forming a sound-cancelling zone and achieving far-field noise cancellation. This effectively improves the far-field privacy of the electronic device and enhances the user experience.

[0260] When a user uses an electronic device, the first sound outlet 13 is placed close to the wearer's ear, and the second sound outlet 14 is placed away from the wearer's ear relative to the first sound outlet 13. This creates an acoustic dipole effect for people around the wearer. Specifically, the distance between the two sound outlets is negligible, and the distances from the two sound outlets to the ears of people around the wearer are close. The sound waves of opposite phases from the two sound outlets cancel each other out when they reach the ears of people around the wearer, thereby reducing sound leakage. For the wearer, the distances from the two sound outlets to the wearer's ears are relatively large, which does not meet the conditions for the acoustic dipole effect. The degree of sound wave cancellation is small, so the wearer can hear sounds of appropriate loudness.

[0261] However, since the propagation of sound waves in the air is non-directional, the structural design of existing speakers cannot achieve superposition and cancellation of sound waves in every direction due to the inconsistency of the sound holes and sound wave transmission channels on both sides of the diaphragm 521. Therefore, some sound will leak out during use, and the effect of improving sound leakage is poor.

[0262] In this embodiment, the diaphragm 521 is fixed to the center of the base 51. The first voice coil 522, the second voice coil 523, and the first and second magnetic circuit assemblies 53, 54 are symmetrically distributed on either side of the diaphragm 521, isolating the inner cavity 511 of the base 51 to form a first sound cavity 5112 and a second sound cavity 5113 symmetrically relative to the diaphragm 521. This ensures that the sound wave transmission channel and the air volume enclosed on both sides of the diaphragm 521 are equal or approximately equal. The sound waves are affected by the propagation channel in a nearly identical manner during transmission, resulting in the same loudness of the sound waves emitted from both sides of the diaphragm 521. Therefore, the sound wave intensities at the first and second sound outlets are comparable, resulting in two equal and oppositely directed sound sources. From a distant fixed location in the environment, since the two sound sources are relatively close, we can assume that the fixed location is approximately the same distance from the two sound sources. These two sound sources generate two equal and oppositely directed sound fields, resulting in the fixed location receiving two equal and oppositely directed sound waves. According to the superposition effect of dipoles, the sound waves at the fixed position can be offset to the greatest extent, which greatly improves the sound leakage problem during use of the loudspeaker 3, protects the user's privacy, and improves the user experience.

[0263] Please refer to FIG. 39 , which is a detailed schematic diagram of the dipole effect of the loudspeaker 3 shown in FIG. 32 .

[0264] The loudspeaker 3 in the embodiment of the present application is centered on the diaphragm 521, and the structures on both sides of the diaphragm 521 are symmetrically arranged. That is, the first voice coil 522 and the second voice coil 523 are symmetrically arranged relative to the diaphragm 521, and the first magnetic circuit component 53 and the second magnetic circuit component 54 are symmetrically arranged relative to the diaphragm 521, so that the sound wave transmission channel and the air volume surrounded by both sides of the diaphragm 521 are equal or approximately equal, so that the loudness of the sound waves emitted from both sides of the diaphragm 521 is the same, which greatly improves the sound leakage problem of the loudspeaker 3 during use, protects the user's privacy, and improves the user experience.

[0265] At the same time, because the first sound outlet holes 5131 and the second sound outlet holes 5141 are also designed to be symmetrical about the diaphragm 521, each opening in the first sound outlet holes 5131 and the second sound outlet holes 5141 is aligned with each other to define multiple parallel lines (not shown in the figure) formed by each group of openings passing through the diaphragm 521. The two dotted circular petals A in Figure 39 generally illustrate the dipole polar response pattern formed by the acoustic response of the loudspeaker 3. This response pattern is symmetrical about the diaphragm 521 and shows directional sound emission from the loudspeaker 3. This embodiment minimizes the generation of sound laterally relative to the thickness direction of the loudspeaker during the dipole acoustic response (or, in an actual system, generates very little lateral sound), maximizes the dipole superposition cancellation effect, and improves the sound leakage problem.

[0266] Please refer to Figures 40 and 41 together. Figure 40 is a simulation analysis diagram of the sound field intensity at the first sound outlet and the second sound outlet of a traditional speaker. Figure 41 is a simulation analysis diagram of the sound field intensity at the first sound outlet 5131 and the second sound outlet 5141 of the speaker 3 of the present application.

[0267] The curve labeled L1 in Figure 40 is a simulation curve of the sound field intensity at the first sound outlet of a conventional speaker at different frequencies, and the curve labeled L2 is a simulation curve of the sound field intensity at the second sound outlet at different frequencies. The curve labeled L3 in Figure 41 is a simulation curve of the sound field intensity at the first sound outlet 5131 of the speaker 3 of the present application at different frequencies, and the curve labeled L4 is a simulation curve of the sound field intensity at the second sound outlet 5141 at different frequencies.

[0268] A traditional speaker includes a basin, a vibration component and a magnetic circuit component. The basin has openings on opposite sides, the vibration component covers one of the openings, and the magnetic circuit component covers the other opening. The first sound outlet of the traditional speaker is located on the side of the vibration component facing away from the magnetic circuit component, and the second sound outlet is located on the side of the magnetic circuit component facing away from the vibration component. As can be seen from Figure 40, the sound field intensity change curves of the first sound outlet and the second sound outlet of the traditional speaker at different frequencies do not basically overlap. In other words, although the traditional speaker also utilizes the principle of superposition and cancellation of dipoles, due to the inconsistency of the sound wave transmission channels on the upper and lower sides of the diaphragm in the traditional solution, there is a difference in the sound field intensity on the upper and lower sides of the speaker, resulting in the attenuation of the superposition and cancellation effect of the dipoles.

[0269] Comparing Figure 41, it can be seen that the sound field intensity change curves of the speaker 3 of the present application at different frequencies at the first sound outlet 5131 and the second sound outlet 5141 are almost the same. In other words, the speaker 3 of the present application is designed in a manner that the structure on both sides of the diaphragm 521 is symmetrically arranged with the diaphragm 521 as the center plane, so that the sound wave transmission channel and the air volume surrounded by the two sides of the diaphragm 521 are equal or approximately equal, thereby obtaining equal sound field intensity at the first sound outlet 5131 and the second sound outlet 5141. In addition, the speaker 3 of the present application has only one diaphragm 521 for sound generation, which is a single drive. The phases of the sound waves generated by the two sides of the vibration of the diaphragm 521 are naturally opposite, so a better dipole implementation method is obtained, which maximizes the superposition and cancellation effect of the dipoles, effectively improves the sound leakage problem of the speaker 3, and improves the user's privacy experience.

[0270] As shown in FIG38 , in this embodiment, the edge of the diaphragm 521 may further include an elastic structure such as a fold. The fold adopts a semicircular arc design to increase displacement in the vibration direction. In actual use, other effective means of increasing displacement may be used, such as an elliptical fold, or the diaphragm 521 may be made of a material with a high elastic modulus. Of course, in other embodiments, the diaphragm may not include a fold. This application does not limit the shape of the diaphragm.

[0271] As shown in Figure 38, in this embodiment, the vibration component 52 may further include a dome 524, which may also be referred to as a reinforcement plate. The dome 524 may cover the surface of the diaphragm 521 to increase the stiffness of the diaphragm 521 and improve its structural stability. In some embodiments, the dome 524 covers the surface of the diaphragm 521 facing the first voice coil 522. In this embodiment, the dome 524 is in the shape of a flat plate. In other embodiments, the number of domes 524 may also be two, and the two domes may respectively cover the two surfaces of the diaphragm 521 facing the first voice coil 522 and the second voice coil 523. Alternatively, the dome 524 may also cover the surface of the diaphragm 521 facing the second voice coil 523. When the dome is applied to a horn-type speaker, the dome may also be in the shape of an arc.

[0272] Please refer to FIG. 38 and FIG. 42 . FIG. 42 is a schematic structural diagram of the first magnetic circuit component 53 of the loudspeaker 3 shown in FIG. 32 in some embodiments.

[0273] In some embodiments, the first magnetic circuit assembly 53 may include a first magnetic steel 531 and a first magnetic conductive plate 532. The first magnetic conductive plate 532 is located on one side of the first magnetic steel 531. The side of the first magnetic steel 531 away from the first magnetic conductive plate 532 is fixed to the first cover plate 513 and is located on the side of the first cover plate 513 close to the frame 512. In other words, the first magnetic steel 531 is sandwiched between the first magnetic conductive plate 532 and the first cover plate 513. The first magnetic steel 531 can be fixed to the first cover plate 513 by bonding. The first magnetic conductive plate 532 is located on one side of the first magnetic steel 531. In some embodiments, the material of the first magnetic conductive plate 532 can be a magnetic conductive material to enhance the overall magnetic field strength of the first magnetic circuit assembly 53, so that the size of the first magnetic steel 531 under the same magnetic field strength conditions can be smaller, which is conducive to the miniaturization of the entire speaker 3.

[0274] Of course, in other embodiments, the first magnetic circuit component 53 may not include the first magnetic conductive plate.

[0275] It can be understood that the first magnet 531 in this embodiment is connected to the middle of the first cover plate 513, and the first sound outlet 5131 is located on both sides of the middle of the first cover plate 513, so that the first magnet 531 will not block the position of the first sound outlet 5131, ensuring that the sound waves are not disturbed during transmission.

[0276] In this embodiment, the first magnetic steel 531 includes a central magnetic steel 5311 and edge magnetic steels 5312 disposed on either side of the central magnetic steel 5311. The central magnetic steel 5311 and the edge magnetic steels 5312 form a first gap 5313. The height of the first voice coil 522 in the first direction is a first height. The distance between the first magnetic circuit assembly 53 and the first surface 5211 is a first distance. The first height is greater than the first distance. The first voice coil 522 partially extends into the first gap 5313, so that when energized, the first voice coil 522 cuts through the magnetic flux lines along the thickness direction of the speaker. This application does not limit the specific structure and shape of the first magnetic steel 531.

[0277] The first magnetic conductive plate 532 includes a central magnetic conductive plate 5321 and edge magnetic conductive plates 5322 disposed on either side of the central magnetic conductive plate 5321. The central magnetic conductive plate 5321 is fixed to the surface of the central magnetic steel 5311 facing away from the first cover plate 513, and the two edge magnetic conductive plates 5322 are located on the side of the two edge magnetic steels 5312 facing away from the first cover plate 513.

[0278] In this embodiment, the middle magnetic conductive plate 5321 can be fixed to the center magnetic steel 5311 by bonding, clamping, welding, or other connection methods. The two edge magnetic conductive plates 5322 are embedded in the first basin frame 5123. For example, the two edge magnetic conductive plates 5322 can be formed into an integral structure with the first basin frame 5123 through an insert molding process. Of course, in other embodiments, the two edge magnetic conductive plates 5322 can also be fixed to their corresponding edge magnetic steel 5312 by bonding, clamping, welding, or other connection methods. This embodiment does not limit the assembly method of the first magnetic circuit assembly 53.

[0279] In some embodiments, the first magnetic steel 531 can be mounted to the first cover plate 513 without adhesive bonding. In some embodiments, the first magnetic steel 531 can be fixed to the first cover plate 513 by screwing, snapping, or other connection methods by providing positioning slots or latching slots on the first cover plate. The fixing method of the first magnetic conductive plate 532 is also not limited to the above description. This embodiment does not limit the assembly method of the first magnetic circuit assembly 53.

[0280] In some embodiments, to further enhance the magnetic field strength and improve the operating efficiency of the speaker 3, the first cover plate 513 may be made of a magnetically conductive material. Specifically, the first magnetic steel 531 is sandwiched between two magnetically conductive plates. The two magnetically conductive plates act together on the first magnetic steel 531, increasing the magnetic field strength of the first magnetic steel 531. This allows the size of the first magnetic steel 531 to be smaller for a given magnetic field strength, facilitating miniaturization of the entire speaker 3.

[0281] Please refer to FIG. 38 and FIG. 43 . FIG. 43 is a schematic diagram of the magnetic pole arrangement of the magnetic circuit assembly of the loudspeaker 3 shown in FIG. 32 .

[0282] In some embodiments, the second magnetic circuit assembly 54 may include a second magnetic steel 541 and a second magnetic conductive plate 542. It is understood that the structures of the second magnetic steel 541 and the second magnetic conductive plate 542 and the manner in which they are assembled to the second cover plate 514 are respectively the same as the structures of the first magnetic steel 531 and the first magnetic conductive plate 532 and the manner in which they are assembled to the first cover plate 513, and thus are not further described. The second magnetic steel 541 forms a second gap 5412. The height of the second voice coil 523 in the first direction is a second height, the distance between the second magnetic circuit assembly 54 and the second surface 5212 is a second distance, the second height is greater than the second distance, and the second voice coil 523 partially extends into the second gap 5412, so that the second voice coil 523 can achieve cutting magnetic flux lines in the thickness direction of the speaker after being energized.

[0283] In some embodiments, the first magnetic circuit assembly 53 and the second magnetic circuit assembly 54 are mounted on the speaker 3 as described above. The magnetic poles of the first magnetic circuit assembly 53 and the second magnetic circuit assembly 54 are aligned as shown in FIG43 . The first magnetic circuit assembly 53 and the second magnetic circuit assembly 54 respectively concentrate the magnetic field at the first gap 5313 and the second gap 5412, thereby enhancing the magnetic field strength at the first gap 5313 and the second gap 5412. In FIG43 , N represents the N magnetic pole, and S represents the S magnetic pole. Furthermore, the magnetic poles of the first magnetic circuit assembly 53 and the second magnetic circuit assembly 54 are arranged in this manner so that, when energized, the first and second voice coils 522 and 523 corresponding to the first and second gaps 5313 and 5412 are subjected to a Lorentz force in the thickness direction of the speaker, thereby causing the first and second voice coils 522 and 523 to cut through the magnetic flux lines in the thickness direction of the speaker, thereby driving the diaphragm 521 to vibrate.

[0284] Of course, in other embodiments, the arrangement of the magnetic poles of the first magnetic circuit component 53 and the second magnetic circuit component 54 may also be different from the arrangement shown in Figure 43, as long as it can ensure that the first voice coil 522 and the second voice coil 523 cut the movement of the magnetic flux lines in the thickness direction of the speaker.

[0285] In some embodiments, in order to further enhance the strength of the magnetic field and improve the working efficiency of the speaker 3, the material of the second cover plate 514 can also be a magnetic conductive material, that is, the second magnetic steel 541 is sandwiched between two magnetic conductive plates, and the two magnetic conductive plates act together on the second magnetic steel 541, so that the magnetic field strength of the second magnetic steel 541 is increased. Under the same magnetic field strength conditions, the size of the second magnetic steel 541 can be smaller, which is conducive to the miniaturization of the entire speaker 3.

[0286] In some other embodiments, both the first cover plate 513 and the second cover plate 514 are made of magnetically conductive materials. This not only ensures the symmetry of the internal structure of the loudspeaker 3, but also uniformly enhances the magnetic field strength on both sides of the diaphragm 521, ensuring equal magnetic field magnitudes on both sides of the diaphragm 521 and consistent vibration frequencies of the voice coils on both sides of the diaphragm 521. Furthermore, when both the first cover plate 513 and the second cover plate 514 are made of magnetically conductive materials, under conditions of equal magnetic field strength, the dimensions of the first magnetic steel 531 and the second magnetic steel 541 can be further reduced, thereby further reducing the dimensions of the entire loudspeaker 3, facilitating miniaturization of the loudspeaker 3.

[0287] In another embodiment, please refer to Figures 44 and 45 in combination. Figure 44 is a structural diagram of another embodiment of the speaker 3 shown in Figure 6, and Figure 45 is a cross-sectional structural diagram of the speaker 3 shown in Figure 44 in the HH direction.

[0288] The structure of the speaker 3 in this embodiment is substantially the same as that of the speaker 3 shown in FIG32 , and the same parts are not repeated here. The difference is that the vibration assembly 52 in this embodiment may further include a suspension member 55 . The frame 512 may include a first connecting protrusion 515 .

[0289] In this embodiment, a first connecting protrusion 515 is provided on the inner wall of the first basin frame 5123 facing the inner cavity 511. There are two first connecting protrusions 515, one located at each end of the first voice coil 522. The suspension member 55 includes two first elastic membranes 551, each connected between the first voice coil 522 and the frame 512, and located at opposite ends of the first voice coil 522. One side of one first elastic membrane 551 is connected to the end of the first voice coil 522 away from the diaphragm 521, and the other side is fixed to the frame 512, specifically to the first connecting protrusion 515 of the frame 512. The other first elastic membrane 551 is symmetrically provided at the other end of the first voice coil 522.

[0290] In this embodiment, the first connecting protrusion 515 is provided on the frame 512 to facilitate a more convenient and secure connection of the first elastic membrane 551 to the frame 512. Of course, in other embodiments, the first connecting protrusion may not be provided on the frame 512, and the first elastic membrane 551 may be directly fixed to the frame 512 by bonding or other connection methods.

[0291] Generally speaking, the operating frequency band of the speaker 3 is distributed in the range of 50Hz to 12000Hz (including 50Hz and 12000Hz). The vibration component 52 composed of the diaphragm 521 and the two voice coils will have different vibration modes at different frequencies. Therefore, during the actual vibration process, a vibration mode that is not in the thickness direction of the speaker will be generated. That is to say, the vibration component 52 may deviate relative to the thickness direction of the speaker during the vibration process.

[0292] In this embodiment, two first elastic membranes 551 are arranged at the end of the first voice coil 522 away from the diaphragm 521 to form a double-end constrained vibration body. When the first voice coil 522 vibrates relative to the frame 512 along the thickness direction of the speaker, since one end of the first elastic membrane 551 is fixed on the frame 512, the problem of deflection during the vibration process is greatly suppressed, making the vibration of the vibration component 52 more stable, and the sound field generated by the left and right of the vibration component 52 more consistent, obtaining a more stable sound field, and effectively improving the sound quality of the speaker 3.

[0293] In one implementation scenario of another embodiment, the suspension member 55 may further include at least one first elastic membrane 551. That is, the suspension member 55 may include one first elastic membrane 551, or the suspension member 55 may include multiple first elastic membranes 551. When the suspension member 55 includes only one first elastic membrane 551, the first elastic membrane 551 may be disposed only at one end of the first voice coil 522. When the suspension member 55 includes multiple first elastic membranes 551, the multiple first elastic membranes 551 may be disposed at intervals around the periphery of the first voice coil 522. In another implementation scenario of another embodiment, the first elastic membrane 551 may be an annular membrane disposed around the first voice coil 522. Its inner side is connected to the first voice coil 522, and its outer side is connected to the frame 512.

[0294] In this embodiment, the first elastic membrane 551 adopts a semicircular design to increase displacement in the vibration direction. In actual use, other effective means of increasing displacement may be used, such as an elliptical design, or using a material with a high elastic modulus for the first elastic membrane. This application does not limit the number or shape of the first elastic membrane 551.

[0295] In another embodiment, please refer to FIG. 46 , which is a schematic structural diagram of the speaker 3 shown in FIG. 45 in another embodiment.

[0296] The structure of the speaker 3 in this embodiment is substantially the same as that of the speaker 3 shown in FIG45 , and the same parts are not repeated here.

[0297] In this embodiment, a second connecting protrusion 516 is provided on the inner wall of the second frame 5124 facing the inner cavity. There are two second connecting protrusions 516, one located at each end of the second voice coil 523. There are two second elastic membranes 552, each connected between the second voice coil 523 and the frame 512, and located at opposite ends of the second voice coil 523. One side of one second elastic membrane 552 is connected to the end of the second voice coil 523 away from the diaphragm 521, while the other side is fixed to the frame 512, specifically to the second connecting protrusion 516 of the frame 512. The other second elastic membrane 552 is symmetrically provided at the other end of the second voice coil 523.

[0298] In this embodiment, the second connecting protrusion 516 is provided on the frame 512 to facilitate a more convenient and secure connection of the second elastic membrane 552 to the frame 512. Of course, in other embodiments, the second connecting protrusion may not be provided on the frame 512, and the second elastic membrane 552 may be directly fixed to the frame 512 by bonding or other connection methods.

[0299] Because deviations between the two voice coils are inevitable during the manufacturing and assembly processes, the first voice coil 522 and the second voice coil 523 are not completely symmetrical in shape and position during actual manufacturing, resulting in poor motion correspondence. This results in the diaphragm 521 deflecting and tilting due to the lack of correspondence when the two voice coils jointly drive the diaphragm 521 to vibrate.

[0300] The double-sided elastic membrane design, with elastic membranes positioned on the sides of both voice coils facing away from the diaphragm 521, adds constraints to both sides of the first and second voice coils 522 and 523, improving the synchronicity of the two voice coils' movements and ensuring smoother vibration of the diaphragm 521. Furthermore, the two elastic membranes are identically designed and manufactured using the same mold, ensuring greater consistency and achieving a stable front-to-back sound field of equal intensity, which enhances the dipole superposition and cancellation effect.

[0301] In this embodiment, the second elastic membrane 552 and the first elastic membrane 551 are symmetrically arranged relative to the diaphragm 521, so that the forces on both sides of the diaphragm 521 are more balanced, so that the vibration component 52 is less likely to deflect during movement, obtaining a more stable sound field and improving the sound quality of the speaker 3.

[0302] In one implementation scenario of another embodiment, the second elastic membrane 552 may not be symmetrically arranged with the first elastic membrane 551 about the diaphragm 521 to reduce the difficulty of product assembly, facilitate assembly, and improve product assembly efficiency. The specific arrangement method can be determined according to the actual application scenario and is not limited in this application.

[0303] In this embodiment, the second elastic membrane 552 has the same structure as the first elastic membrane 551. Therefore, the second elastic membrane 552 and the first elastic membrane 551 can be realized through a set of mold processing, ensuring that the second elastic membrane 552 and the first elastic membrane 551 are more consistent, so as to ensure that the vibration component is more stable during movement. The second elastic membrane 552 adopts a semicircular arc design to increase the displacement in the vibration direction. In actual use, other effective means to increase the displacement can be used, such as adopting an elliptical design, or the second elastic membrane adopts a material with a high elastic modulus. This application does not limit the number and shape of the second elastic membrane 552. Of course, in other embodiments, the second elastic membrane 552 and the first elastic membrane 551 may also have different structures.

[0304] In one implementation scenario of another embodiment, the suspension member 55 may further include at least one second elastic membrane 552. That is, the suspension member 55 may include one second elastic membrane 552, or the suspension member 55 may include multiple second elastic membranes 552. When the suspension member 55 includes only one second elastic membrane 552, the single second elastic membrane 552 may be disposed only at one end of the second voice coil 523. When the suspension member 55 includes multiple second elastic membranes 552, the multiple second elastic membranes 552 may be disposed at intervals around the periphery of the second voice coil 523. In another implementation scenario of another embodiment, the second elastic membrane 552 may be an annular membrane disposed around the second voice coil 523. Its inner side is connected to the second voice coil 523, and its outer side is connected to the frame 512. This application does not limit the number or shape of the second elastic membranes 552.

[0305] In another embodiment, please refer to FIG. 47 , which is a schematic structural diagram of another embodiment of the loudspeaker 3 shown in FIG. 46 .

[0306] The structure of the speaker 3 in this embodiment is substantially the same as that of the speaker 3 shown in FIG46 , and the common parts are not further described. The difference is that the vibration assembly 52 in this embodiment further includes a flexible circuit board 60. There are multiple flexible circuit boards 60, one on each first elastic membrane 551 and each second elastic membrane 552. The flexible circuit board 60 on the first elastic membrane 551 is electrically connected to the first voice coil 522 at one end and to the circuit board 40 at the other end. The flexible circuit board 60 on the second elastic membrane 552 is electrically connected to the second voice coil 523 at one end and to the circuit board 40 at the other end.

[0307] In this embodiment, the electrical connection between the first voice coil 522 and the second voice coil 523 and the circuit board 40 is achieved through the flexible circuit board 60. Of course, in other embodiments, the electrical connection between the first voice coil 522 and the second voice coil 523 and the circuit board 40 can also be achieved through external wires or the voice coil wire itself. However, compared to external wires or the voice coil wire itself, the electrical connection between the first voice coil 522 and the second voice coil 523 and the circuit board 40 through the flexible circuit board 60 improves the electrical reliability of the vibration assembly 52.

[0308] In other embodiments, the number of flexible circuit boards 60 may be one or more. For example, there may be two flexible circuit boards 60, one disposed on one of the first elastic membranes 551 and the other disposed on one of the second elastic membranes 552, to achieve electrical connection between the first voice coil 522 and the second voice coil 523 and the circuit board 40.

[0309] In other embodiments, the flexible circuit board 60 can be provided only on the first elastic membrane 551, as shown in Figure 48, which is a schematic structural diagram of another embodiment of the loudspeaker 3 shown in Figure 6. Compared to providing the flexible circuit board 60 only on the first elastic membrane 551, providing the flexible circuit board 60 on both the first elastic membrane 551 and the second elastic membrane 552 not only improves the electrical reliability of the vibration assembly 52 but also ensures the structural symmetry of the entire loudspeaker 3 relative to the two sides of the diaphragm 521. This maintains approximately equal sound wave transmission channels and air volumes on both sides of the diaphragm 521, achieving an excellent dipole superposition cancellation effect.

[0310] In this embodiment, a slit 61 is provided on the flexible circuit board 60 , and the slit 61 is arranged opposite to the first sound outlet 5131 and the second sound outlet 5141 to minimize the impact on the transmission of sound waves and reduce the loss of sound waves during the propagation process.

[0311] In another implementation scenario of other embodiments, the slits 61 on the flexible circuit board 60 may not be arranged corresponding to the sound outlet holes, or the flexible circuit board 60 may not be provided with slits.

[0312] In another embodiment, please refer to FIG. 49 , which is a schematic structural diagram of the speaker 3 shown in FIG. 6 in another embodiment.

[0313] The structure of this embodiment is roughly the same as that of the embodiment shown in Figure 47, and the identical parts will not be repeated. The difference is that a magnetic fluid 70 is also provided in the first gap 5313 in the first magnetic circuit component 53 of the present application. Specifically, the magnetic fluid 70 is a functional material that has both liquid fluidity and the magnetism of a solid magnetic material. When the magnetic fluid 70 is in a static state, there is no magnetic attraction. When an external magnetic field acts, the magnetic fluid 70 exhibits magnetism. Therefore, when the magnetic fluid 70 is filled in the first gap 5313, since the first magnetic steel 531 generates a magnetic field, the magnetic fluid 70 will be adsorbed in the first gap 5313 and will not drip.

[0314] During the vibration of the vibration component 52, when the first voice coil 522 is energized and moves along the thickness direction of the speaker to cut the magnetic flux lines under the action of the Lorentz force, the first voice coil 522 will also generate vibrations in a direction other than the thickness direction of the speaker, resulting in displacement or tilt in a direction other than the thickness direction of the speaker. The first voice coil 522 may collide with the first magnet 531 during the vibration process.

[0315] In this embodiment, by filling the first gap 5313 with magnetic fluid 70, due to its fluidity, when the first voice coil 522 partially extends into the first gap 5313, the magnetic fluid 70 can envelop the extended portion of the first voice coil 522. When the first voice coil 522 vibrates in a direction other than the speaker thickness during vibration, the magnetic fluid 70 restricts the displacement or tilt of the first voice coil 522 in this direction, thereby reducing the displacement or tilt of the first voice coil 522 in this direction. Furthermore, due to the fluidity of the magnetic fluid 70, the restriction of the first voice coil 522 by the magnetic fluid 70 does not affect its movement, resulting in more stable vibration of the first voice coil 522, preventing collision with the first magnet 531 and enhancing the stability of the vibration system.

[0316] On the other hand, conventional speaker designs often use a sufficiently wide first gap 5313 to prevent the first voice coil 522 from colliding with the first magnetic steel 531. However, this embodiment mitigates this collision issue by filling the first gap 5313 with magnetic fluid 70. Consequently, the width of the first gap 5313 can be further reduced in the design of the speaker 3, increasing the strength of the magnetic field and improving the speaker's operating efficiency. Furthermore, the reduction in the first gap 5313 improves the overall integration of the speaker 3, facilitating its miniaturization.

[0317] Accordingly, because the second magnetic circuit assembly 54 and the first magnetic circuit assembly 53 are symmetrically arranged with respect to the vibration assembly 52, the second gap 5412 in the second magnetic circuit assembly 54 is also filled with magnetic fluid 70 and partially surrounds the second voice coil 523. Of course, in other embodiments, either the first gap 5313 or the second gap 5412 can be filled with magnetic fluid 70.

[0318] Referring again to Figures 5, 6, and 38, one of the first sound outlet 5131 and the second sound outlet 5141 of the speaker 3 can communicate with the first space 411, while the other can communicate with the second space 412, thereby communicating with the first sound outlet 42 and the second sound outlet 43. For example, this embodiment illustrates the first sound outlet 5131 communicating with the first space 411 and the first sound outlet 42, while the second sound outlet 5141 communicates with the second space 412 and the second sound outlet 43. When the speaker module 30 is installed within the temple 12 (i.e., within the housing), the first sound outlet 5131 of the speaker 3 communicates with the first channel 1228 and the first sound outlet 13, while the second sound outlet 5141 communicates with the second channel 1229 and the second sound outlet 14. For example, the first sound outlet 13 can be aligned with a portion of the opening of the first sound outlet 5131, and the second sound outlet 14 can be aligned with a portion of the opening of the second sound outlet 5141.

[0319] In some other embodiments, the speaker 3 may also be a dynamic speaker of other structures, or may also be a piezoelectric speaker, a micro-electro-mechanical system (MEMS) speaker, etc.

[0320] Please refer to FIG. 50 , which is a schematic structural diagram of another electronic device 1000 provided in this embodiment.

[0321] The electronic device 1000 in this embodiment is a mobile phone. The electronic device 1000 includes a housing 80 and a speaker module 30. The speaker module 30 is housed within the housing 80. The housing 80 includes a first sound outlet 13 and a second sound outlet 14 that are arranged opposite each other. The first sound outlet 42 and the third sound outlet 44 of the speaker module 30 communicate with the first channel 1228 and the first sound outlet 13. The second sound outlet 43 of the speaker module 30 communicates with the second channel 1229 and the second sound outlet 14.

[0322] It is understood that the speaker module 30 and the speaker 3 of the speaker module 30 in this embodiment can be the speaker 3 described in any of the above embodiments. Since the speaker module 30 in this application is very effective in improving sound leakage, the electronic device 1000 with this speaker module 30 can effectively protect the user's privacy and improve the user experience.

[0323] The first sound wave emitted from the first sound emission hole 42 and the third sound wave emitted from the third sound emission hole 44 pass through the first channel 1228 and are emitted from the first sound emission hole 13. The second sound wave emitted from the second sound emission hole 43 passes through the second channel 1229 and is emitted from the second sound emission hole 14. The second sound wave and the first sound wave have the same amplitude and opposite phase, and the third sound wave and the first sound wave have the same phase.

[0324] When the user uses the electronic device 1000, the second sound outlet 14 is close to the wearer's ear C, and the first sound outlet 13 is close to the wearer's ear C relative to the second sound outlet 14. For people around the wearer, an acoustic dipole effect can be formed. Specifically, the distance between the two sound outlets can be ignored, and the distances from the two sound outlets to the ears C of the surrounding people are close. The sound waves of opposite phases from the two sound outlets cancel each other out when they reach the ears C of the surrounding people, thereby reducing sound leakage. For the wearer, the distances from the two sound outlets to the wearer's ears C are relatively large, which does not meet the conditions for the acoustic dipole effect, and the degree of sound wave cancellation is small, so the wearer can hear sounds of appropriate loudness. At the same time, the superposition of the third sound wave and the first sound wave helps to improve the frequency response, so that the wearer feels a better listening experience.

[0325] It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the scope of protection of this application. In other words, the multiple embodiments described above can also be combined arbitrarily according to actual needs. All of the above drawings are illustrative illustrations of this application and do not represent the actual size of the product. The dimensional ratio relationship between the components in the drawings is not intended to limit the actual product of this application.

[0326] The above are only some of the embodiments and implementations of this application. The scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A speaker module, characterized in that: including a housing and a speaker; The housing has an installation space, the speaker is fixed to the installation space, and the installation space is divided into a first space and a second space. When the speaker is in operation, a first sound wave is formed in the first space, and a second sound wave is formed in the second space. The second sound wave has an amplitude equal to that of the first sound wave and a phase opposite thereto. The housing further comprises a first sound emitting hole and a second sound emitting hole disposed opposite to each other, the first sound emitting hole being connected to the first space, and the second sound emitting hole being connected to the second space; The shell also has a third sound hole and an inverted cavity, one end of the inverted cavity is connected to the second space, and the other end of the inverted cavity is connected to the third sound hole. The inverted cavity is used to form a third sound wave at the third sound hole when the speaker is working. The phase of the third sound wave is the same as the phase of the first sound wave, and the third sound wave is superimposed on the first sound wave passing through the first sound hole.

2. The speaker module according to claim 1, wherein: The sound emission direction of the third sound emission hole is the same as the sound emission direction of the first sound emission hole.

3. The speaker module according to claim 1, wherein: The third sound wave resonates within a frequency range of 50 Hz to 200 Hz.

4. The speaker module according to claim 1, wherein: The speaker comprises a base, a vibration component and a magnetic circuit component; The base has an inner cavity; The magnetic circuit component is arranged in the inner cavity, and the magnetic circuit component has a magnetic gap; The vibration assembly includes a first diaphragm, a second diaphragm, and a voice coil. The first diaphragm and the second diaphragm are respectively located on opposite sides of the magnetic circuit assembly. The peripheries of the first diaphragm and the second diaphragm are connected to the base. The voice coil is located in the magnetic gap, and the opposite sides of the voice coil are respectively connected to the first diaphragm and the second diaphragm. One of the first diaphragm and the second diaphragm faces the first space, and the other faces the second space.

5. The speaker module according to claim 4, characterized in that: The voice coil includes a first side portion and a second side portion that are arranged opposite to each other, wherein the first side portion and the second side portion are both parallel to the central axis of the voice coil, the first side portion is connected to the first diaphragm, and the second side portion is connected to the second diaphragm.

6. The speaker module according to claim 5, characterized in that: The magnetic circuit assembly includes a first part and a second part. Both the first part and the second part are magnetic. The first part and the second part are arranged relative to each other with a gap, and the magnetic gap is formed between the first part and the second part.

7. The speaker module according to claim 4, wherein: The voice coil includes a first end surface and a second end surface that are arranged opposite to each other. The first end surface and the second end surface are both perpendicular to the central axis of the voice coil. The first end surface is connected to the first diaphragm, and the second end surface is connected to the second diaphragm.

8. The loudspeaker module according to any one of claims 4 to 7, characterized in that: There are multiple voice coils, and the multiple voice coils are arranged along the length direction of the speaker.

9. The speaker module according to claim 8, wherein: The magnetic gap extends along the length direction of the speaker, and the multiple voice coils are arranged in the magnetic gap at intervals; or, the speaker includes multiple magnetic gaps, the multiple magnetic gaps are arranged at intervals along the length direction of the speaker, and the multiple voice coils are located in the multiple magnetic gaps in a one-to-one correspondence.

10. The loudspeaker module according to any one of claims 4 to 7, characterized in that: The first diaphragm and the second diaphragm are symmetrically arranged relative to the magnetic circuit assembly.

11. The speaker module according to claim 1, wherein: The speaker includes a base, a vibration component, a first magnetic circuit component, and a second magnetic circuit component. The base has an inner cavity, the vibration component is disposed in the inner cavity, and the first magnetic circuit component and the second magnetic circuit component are respectively located on both sides of the vibration component and are symmetrically arranged relative to the vibration component. The vibration assembly includes a diaphragm, a first voice coil, and a second voice coil. The diaphragm, the first voice coil, and the second voice coil are stacked in a first direction. The diaphragm includes a first surface and a second surface disposed opposite to each other in the first direction. The diaphragm divides the inner cavity into a first sound cavity and a second sound cavity. The first voice coil is fixed to the first surface, and the second voice coil is fixed to the second surface. The first magnetic circuit assembly and the second magnetic circuit assembly are respectively located in the first sound cavity and the second sound cavity. The first sound cavity is connected to the first space, and the second sound cavity is connected to the second space.

12. The speaker module according to claim 11, wherein: The projection of the first voice coil on the first surface is annular, the height of the first voice coil in the first direction is a first height, the distance between the first magnetic circuit component and the first surface is a first distance, and the first height is greater than the first distance; and / or, The projection of the second voice coil on the second surface is annular, the height of the second voice coil in the first direction is a second height, the distance between the second magnetic circuit component and the second surface is a second distance, and the second height is greater than the second distance.

13. The speaker module according to claim 11, wherein: The first voice coil and the second voice coil are symmetrically arranged relative to the diaphragm, and the first magnetic circuit component and the second magnetic circuit component are symmetrically arranged relative to the diaphragm.

14. The loudspeaker module according to any one of claims 11 to 13, characterized in that: The base includes a frame, a first cover plate and a second cover plate, the first cover plate and the second cover plate respectively cover opposite sides of the frame, the diaphragm is connected to the inside of the frame, the first magnetic circuit assembly and the second magnetic circuit assembly are respectively connected to the first cover plate and the second cover plate, the first cover plate includes a first sound outlet hole, the second cover plate includes a second sound outlet hole, the first sound outlet hole and the second sound outlet hole are symmetrical relative to the diaphragm; the first sound outlet hole is connected to the first space, and the second sound outlet hole is connected to the second space.

15. The loudspeaker module according to any one of claims 11 to 13, characterized in that: The first magnetic circuit component includes a first gap, and the second magnetic circuit component includes a second gap. The first gap and the second gap are symmetrically arranged relative to the diaphragm. The first voice coil at least partially extends into the first gap, and the second voice coil at least partially extends into the second gap.

16. An electronic device, characterized in that: The electronic device includes a housing and a speaker module according to any one of claims 1 to 15, the housing having a first sound outlet and a second sound outlet, the speaker module being installed inside the housing, and the first sound outlet and the third sound outlet of the speaker module being connected to the first sound outlet, and the second sound outlet of the speaker module being connected to the second sound outlet.

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