Loudspeaker and electronic equipment

Abstract

The invention provides a loudspeaker and electronic equipment. The loudspeaker comprises a first magnet, a second magnet, a vibrating diaphragm, a voice coil and a first upper magnetizer. The first magnet is located on the inner side of the second magnet. The vibrating diaphragm, the first magnet and the second magnet are oppositely arranged at intervals. The voice coil is fixed on the surface of the diaphragm facing the first magnet. The voice coil, the first magnet and the second magnet are arranged at intervals, and the projection of the voice coil in the first direction is overlapped with part of the first magnet and / or part of the second magnet. The first direction is the thickness direction of the loudspeaker. The first upper magnetizer is fixed on the surface, facing the vibrating diaphragm, of the first magnet. The first upper magnetizer, the vibrating diaphragm and the voice coil are arranged at intervals, and the first upper magnetizer is partially located on the inner side of the voice coil. According to the loudspeaker, the first upper magnetizer is arranged on the inner side of the voice coil to converge the magnetic induction lines in the magnetic fields generated by the first magnet and the second magnet to the voice coil position, so that the magnetic induction intensity at the voice coil position is enhanced, the efficiency of the loudspeaker is improved, and the high-pitch effect of the loudspeaker is improved.

Description

Technical Field

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

[0002] Loudspeakers, also known as horns, are electroacoustic transducers widely used in electronic devices such as speakers, headphones, and mobile phones. Current speakers can be divided into dynamic speakers, moving iron speakers, and planar diaphragm speakers based on their working principles. With the development of technology, in order to pursue higher sound quality, electronic devices such as headphones often use multiple drive units, that is, tweeters and woofers are used together. However, current tweeters generally have poor treble effects and low efficiency, which affects the sound quality of electronic devices and the user experience. Summary of the invention

[0003] The embodiments of the present application provide a speaker and an electronic device including the speaker, aiming to provide a speaker and an electronic device with better treble effect and higher speaker efficiency.

[0004] In a first aspect, a loudspeaker is provided. The loudspeaker comprises a first magnet, a second magnet, a diaphragm, a voice coil and a first upper magnetic conductor. The first magnet is located on the inner side of the second magnet. The diaphragm is opposite to and spaced apart from the first magnet and the second magnet. The voice coil is fixed to the surface of the diaphragm facing the first magnet. The voice coil is spaced apart from the first magnet and the second magnet, and the projection of the voice coil in the first direction overlaps with part of the first magnet and / or part of the second magnet. The first direction is the thickness direction of the loudspeaker. The first upper magnetic conductor is fixed to the surface of the first magnet facing the diaphragm. The first upper magnetic conductor is spaced apart from the diaphragm and the voice coil, and the first upper magnetic conductor is partially located on the inner side of the voice coil.

[0005] It is understandable that the magnetic circuit components in general planar diaphragm speakers can only conduct magnetism through the air so that the magnetic flux lines can pass through the voice coil. Due to the low magnetic permeability of air, it is more difficult for the magnetic flux lines to pass through the air, which makes the magnetic induction intensity at the voice coil position low, and the efficiency of the planar diaphragm speaker is low, which affects the treble effect of the planar diaphragm speaker. The speaker in this embodiment is provided with a first upper magnetic conductor with a magnetic conduction function on the inner side of the voice coil. The first upper magnetic conductor can gather the magnetic flux lines in the magnetic field generated between the first magnet and the second magnet to the voice coil position, thereby effectively increasing the force factor of the magnetic field, enhancing the magnetic induction intensity at the voice coil position, improving the efficiency of the speaker, and enhancing the treble effect of the speaker. At the same time, compared to the general planar diaphragm speaker, which needs to increase the size of the magnet to increase the magnetic induction intensity at the voice coil position, the speaker in this embodiment can greatly increase the magnetic induction intensity at the voice coil position by only setting the first upper magnetic conductor inside the voice coil, and the first upper magnetic conductor can use the space between the diaphragm and the first magnet, so that the first upper magnetic conductor can enhance the magnetic induction intensity at the voice coil position without increasing the width and thickness of the entire speaker. In other words, under the condition of the same magnetic induction intensity at the voice coil position, the size of the speaker in this embodiment can be made smaller, which is conducive to realizing the miniaturization of the speaker.

[0006] Secondly, the first upper magnetic conductor in this embodiment is fixedly connected to the first magnet, so that the first upper magnetic conductor can be in direct contact with the first magnet, and there is no gap between the first upper magnetic conductor and the first magnet. In this way, after the magnetic flux lines pass through the first magnet, the magnetic flux lines can be directly conducted through the first upper magnetic conductor without passing through the air. The magnetic permeability of the first upper magnetic conductor is relatively high, making it easier for the magnetic flux lines to pass through the first upper magnetic conductor, so that more of them can be gathered at the voice coil position, increasing the force factor of the magnetic field, improving the magnetic induction intensity at the voice coil position, and improving the efficiency of the speaker.

[0007] In a possible implementation, the width of the first upper magnetic conductor is a first width. The first width is greater than or equal to 0.5 mm. In this way, the first upper magnetic conductor has a certain width, so that the first upper magnetic conductor can be fixed on the surface of the first magnet by bonding or other methods.

[0008] In a possible implementation, the inner width of the voice coil is the second width. The second width is greater than or equal to 0.6 mm. In this way, the inner space of the voice coil has a certain width, so that it can accommodate the first upper magnetic conductor with a certain width. The first upper magnetic conductor can converge the magnetic flux lines in the magnetic field generated between the first magnet and the second magnet to the position of the voice coil, thereby effectively increasing the force factor of the magnetic field, enhancing the magnetic induction intensity at the position of the voice coil, improving the efficiency of the speaker, and enhancing the treble effect of the speaker.

[0009] In a possible implementation, the difference between the first width and the second width is greater than or equal to 0.1 mm. In this way, there is a gap between the first upper magnetic conductor and the inner peripheral side wall of the voice coil, thereby preventing the voice coil from colliding with the first upper magnetic conductor due to deviation along the width direction of the voice coil during vibration, thereby affecting the acoustic performance of the speaker.

[0010] In a possible implementation, the distance between the inner peripheral side wall and the outer peripheral side wall of the voice coil is a third width. The third width is greater than the thickness of the voice coil. In this way, the voice coil is a planar voice coil, which is conducive to improving the treble effect of the speaker.

[0011] In a possible implementation, the winding plane of the voice coil is perpendicular to the first direction. In this way, the voice coil is a planar voice coil, which is conducive to improving the treble effect of the speaker.

[0012] In a possible implementation, the speaker also includes a second upper magnetic conductor. The second upper magnetic conductor is fixed to the surface of the second magnet facing the diaphragm. The second upper magnetic conductor is located on the side of the voice coil that is away from the first upper magnetic conductor. In this way, by providing the second upper magnetic conductor, the magnetic flux lines in the magnetic field generated between the first magnet and the second magnet can be further converged to the position of the voice coil, thereby further increasing the force factor of the magnetic field, enhancing the magnetic induction intensity at the position of the voice coil, improving the efficiency of the speaker, improving the output sound quality of the speaker, and enhancing the treble effect of the speaker. At the same time, magnetic conductors (that is, the first upper magnetic conductor and the second upper magnetic conductor) are provided on both sides of the voice coil, so that the magnetic field distribution on both sides of the voice coil is more symmetrical, which is beneficial to improving the acoustic performance of the speaker.

[0013] In addition, the second upper magnetic conductor in this embodiment is fixedly connected to the second magnet, so that the second upper magnetic conductor can be in direct contact with the second magnet, and there is no gap between the second upper magnetic conductor and the second magnet. In this way, after the magnetic flux lines pass through the second magnet, the magnetic flux lines can be directly conducted through the second upper magnetic conductor without passing through the air. The magnetic permeability of the second upper magnetic conductor is relatively high, making it easier for the magnetic flux lines to pass through the second upper magnetic conductor, so that more of them can be gathered at the voice coil position, increasing the force factor of the magnetic field, improving the magnetic induction intensity at the voice coil position, and improving the efficiency of the speaker.

[0014] In a possible implementation, the distance between the second upper magnetic conductor and the voice coil is greater than or equal to 0.05 mm. In this way, there is a gap between the second upper magnetic conductor and the outer peripheral side wall of the voice coil, so as to prevent the voice coil from colliding with the second upper magnetic conductor due to displacement along the width direction of the voice coil (that is, the radial direction of the voice coil in this embodiment) during vibration, thereby affecting the acoustic performance of the speaker.

[0015] In a possible implementation, the second upper magnetic conductor has a notch. The voice coil is electrically connected to the power supply through the notch. In this way, the voice coil and the power supply outside the speaker can form a current loop. The power supply can transmit a current signal to the voice coil.

[0016] In a possible implementation, the second upper magnetic conductor is provided with a first avoidance step. The opening of the first avoidance step is formed on the surface of the second upper magnetic conductor facing the second magnet and on the outer peripheral side of the second upper magnetic conductor. The first avoidance step is connected to the gap. The speaker also includes a circuit board. At least part of the circuit board is located in the first avoidance step. The voice coil is electrically connected to the circuit board through the gap. The circuit board is electrically connected to the power supply. In this way, the circuit board can utilize the thickness space of the second upper magnetic conductor, which is conducive to improving the space utilization rate of the speaker.

[0017] In a possible implementation, the loudspeaker further includes a lower magnetic conductor, which is fixedly connected to a surface of the first magnet facing away from the diaphragm and / or a surface of the second magnet facing away from the diaphragm.

[0018] It is understandable that the speaker in this embodiment also includes a lower magnetic conductor. The lower magnetic conductor is fixed on the side of the first magnet facing away from the voice coil, so that the magnetic field strength of the magnetic circuit assembly as a whole can be further enhanced, and the force factor of the magnetic field can be increased, which is beneficial to improving the efficiency of the speaker. At the same time, under the same magnetic field strength conditions, the speaker in this embodiment enhances the magnetic field strength by setting the lower magnetic conductor, so that the size of the first magnet and / or the second magnet can be made smaller, which is beneficial to achieve the miniaturization of the entire speaker. Alternatively, under the condition that the overall thickness of the speaker remains unchanged, the lower magnetic conductor can be set by sacrificing part of the thickness of the first magnet and the second magnet, so that the force factor of the magnetic field can be increased without changing the thickness of the speaker, and the magnetic induction intensity at the voice coil position can be increased, thereby improving the efficiency of the speaker.

[0019] In a possible implementation, the diaphragm includes a first vibrating portion and a second vibrating portion. The second vibrating portion is annular. The first vibrating portion is located inside the second vibrating portion and is fixedly connected to the second vibrating portion. The voice coil is fixedly connected to the surface of the first vibrating portion facing the first magnet. The first vibrating portion includes a first straight portion and a first folding ring portion. The first straight portion is annular, the first folding ring portion is located inside the first straight portion and is fixedly connected to the first straight portion. The first folding ring portion protrudes in a direction away from the first magnet relative to the first straight portion. The first straight portion is connected between the second vibrating portion and the first folding ring portion. And / or, the second vibrating portion includes a second straight portion and a second folding ring portion. The second folding ring portion is connected between the second straight portion and the first vibrating portion. The second folding ring portion protrudes in a direction away from the first magnet relative to the second straight portion. In this way, the diaphragm has a bent portion (i.e., the first folding ring portion or the second folding ring portion), which is conducive to improving the displacement of the diaphragm in its vibration direction and improving the acoustic performance of the speaker.

[0020] In a possible implementation, the diaphragm includes a first vibrating part and a second vibrating part. The second vibrating part is annular. The first vibrating part is located inside the second vibrating part and is fixedly connected to the second vibrating part. The first vibrating part includes a first connecting part, a first main body, a second connecting part and a second main body. The first connecting part, the first main body and the second connecting part are all annular. The second main body is located inside the first connecting part and is fixedly connected to the first connecting part. The second connecting part is located outside the first connecting part. The first main body is connected between the first connecting part and the second connecting part. The second connecting part is fixedly connected to the second vibrating part. In the first direction, the distance from the first main body to the first magnet is less than the distance from the second main body to the first magnet. The voice coil is embedded in the first main body. The surface of the voice coil facing the first magnet is exposed relative to the first main body.

[0021] The inner width of the first connecting portion is a fourth width, and the fourth width is greater than or equal to 0.6 mm.

[0022] It can be understood that the speaker in this embodiment embeds the voice coil in the first main body portion of the diaphragm and sinks the first main body portion in the direction close to the first magnet, so that the vibration component can embed the voice coil in the diaphragm while the inner side of the voice coil of the vibration component can still have a space for storing the first upper magnetic conductor, so that the first upper magnetic conductor can be arranged on the inner side of the voice coil to enhance the magnetic induction intensity at the position of the voice coil and improve the efficiency of the speaker.

[0023] In a possible implementation, the speaker also includes a shell. The shell includes a top and a frame. The frame is fixedly connected to the outer periphery of the top. The voice coil, the diaphragm, the first magnet, the second magnet and the first upper magnetic conductor are all accommodated on the inner side of the shell. The space between the diaphragm and the top constitutes a front cavity of the speaker. The top includes a first part, a second part and a transition part. The transition part is connected between the first part and the second part. In a first direction, the distance from the first part to the diaphragm is greater than the distance from the second part to the diaphragm. The first part is provided with a sound outlet hole, which connects the front cavity with the external space of the speaker.

[0024] It is understandable that, compared to existing speakers, in order to ensure the overall axially symmetrical design of the speaker, the thickness of the module will remain consistent, that is, the distance from the top of the shell to the diaphragm is basically the same, so that the thickness of the speaker is limited by the stacking method of the components inside the electronic device. In this embodiment, the top of the speaker shell may include a first part and a second part with two different heights. The first part of the top can be raised relative to the second part. Among them, the second part of the top can be stacked with the internal components of the electronic device in a first direction, and the first part of the top can be raised relative to the second part in the direction toward the internal components. In this way, on the one hand, the volume of the front cavity of the speaker can be increased without affecting the stacking of the internal components of the electronic device; on the other hand, the sound outlet located in the first part of the top can be closer to the sound outlet of the electronic device. In other words, the shell of the speaker in this embodiment can be a variable height shell. By providing a shell with different height parts (i.e., the first part and the second part at the top), the volume of the front cavity can be increased without affecting the stacking of internal components of the electronic device, and the sound outlet can be made closer to the sound outlet of the electronic device, so that the speaker can create additional resonance peaks in the high frequency band, improve the sensitivity of the speaker in the high frequency band, and widen the bandwidth of the entire speaker, so as to obtain a speaker with better treble effect.

[0025] In a second aspect, an electronic device is provided. The electronic device includes a housing and the above-mentioned speaker. The speaker is accommodated inside the housing. The speaker of this embodiment is provided with a first upper magnetic conductor having a magnetic conductive function on the inner side of the voice coil. The first upper magnetic conductor can gather the magnetic flux lines in the magnetic field generated between the first magnet and the second magnet to the position of the voice coil, thereby effectively increasing the force factor of the magnetic field, enhancing the magnetic induction intensity at the position of the voice coil, improving the efficiency of the speaker, and improving the high-pitched effect of the speaker. At the same time, compared with the general planar diaphragm speaker, which needs to increase the size of the magnet to increase the magnetic induction intensity at the position of the voice coil, the speaker in this embodiment can greatly increase the magnetic induction intensity at the position of the voice coil by only arranging the first upper magnetic conductor on the inner side of the voice coil, and the first upper magnetic conductor can use the space between the diaphragm and the first magnet, so that the first upper magnetic conductor can enhance the magnetic induction intensity at the position of the voice coil without additionally increasing the width and thickness of the entire speaker. In other words, under the condition that the magnetic induction intensity at the position of the voice coil is the same, the size of the speaker in this embodiment can be made smaller, which is conducive to realizing the miniaturization of the speaker and saving the internal space of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the implementation methods of the present application or the background technology, the drawings required for use in the implementation methods of the present application or the background technology will be described below.

[0027] Figure 1aIt is a structural schematic diagram of an implementation manner of an electronic device provided in an implementation manner of the present application;

[0028] Figure 1b yes Figure 1a The cross-sectional structure schematic diagram of an electronic device in one embodiment cut along AA is shown;

[0029] Figure 2 yes Figure 1b A schematic structural diagram of a speaker of an electronic device in one embodiment is shown;

[0030] Figure 3 yes Figure 2 A schematic diagram of the exploded structure of a loudspeaker in some embodiments is shown;

[0031] Figure 4 yes Figure 3 A schematic diagram of the assembly structure of the first magnet, the second magnet and the lower magnetic conductor in one embodiment is shown;

[0032] Figure 5 yes Figure 2 The schematic diagram of a partial cross-sectional structure of a loudspeaker in one embodiment shown is cut along line BB;

[0033] Figure 6 yes Figure 3 A schematic diagram of the structure of a circuit board of the loudspeaker shown;

[0034] Figure 7 yes Figure 3 A schematic diagram of the assembly structure of a partial structure of a loudspeaker in one embodiment is shown;

[0035] Figure 8 yes Figure 2 The schematic diagram of a partial cross-sectional structure of a loudspeaker in one embodiment cut along BB is shown;

[0036] Fig. 9 yes Figure 3 A schematic structural diagram of a second upper magnetic conductor of the loudspeaker shown;

[0037] Fig.10 yes Fig. 9 A schematic structural diagram of the second upper magnetic conductor shown in another viewing angle;

[0038] Fig.11 yes Figure 3 A schematic diagram of the assembly structure of a partial structure of a loudspeaker in one embodiment is shown;

[0039] Fig.12 yes Figure 2 The cross-sectional structure diagram of a loudspeaker in one embodiment cut along BB is shown;

[0040] Fig.13 yes Figure 2 The schematic diagram of a partial cross-sectional structure of a loudspeaker in one embodiment cut along CC is shown;

[0041] Fig.14 yes Figure 3 A schematic diagram of the exploded structure of the vibration assembly of the loudspeaker shown;

[0042] Fig.15 yes Figure 2 The schematic diagram of a partial cross-sectional structure of a loudspeaker in one embodiment cut along BB is shown;

[0043] Fig.16a yes Fig.14 A schematic structural diagram of the assembly structure of the diaphragm and the voice coil shown in another perspective;

[0044] Fig.16b yes Fig.14 A top view of the voice coil shown in one embodiment;

[0045] Fig.17 yes Figure 2 The schematic diagram of a partial cross-sectional structure of a loudspeaker in one embodiment cut along BB is shown;

[0046] Fig.18 yes Figure 3 A schematic diagram of the assembly structure of a vibration component and a magnetic circuit component of a loudspeaker in one embodiment is shown;

[0047] Fig.19 yes Figure 3 A schematic diagram of the assembly structure of a partial structure of a loudspeaker in one embodiment is shown;

[0048] Fig. 20 yes Figure 2 The schematic diagram of a partial cross-sectional structure of a loudspeaker in one embodiment cut along BB is shown;

[0049] Fig.21 yes Figure 2 The schematic diagram of a partial cross-sectional structure of a loudspeaker in one embodiment cut along CC is shown;

[0050] Fig. 22 is a simplified schematic diagram of magnetic field distribution of a voice coil, a first magnet, and a second magnet of a planar diaphragm loudspeaker in some embodiments;

[0051] Fig.23 yes Figure 2 A simplified schematic diagram of magnetic field distribution of the voice coil, the first magnet, the second magnet and the first upper magnetic conductor of the loudspeaker shown;

[0052] Fig.24 yes Figure 2 A simplified schematic diagram of magnetic field distribution of a voice coil, a first magnet, a second magnet, a first upper magnetic conductor and a lower magnetic conductor of a loudspeaker shown;

[0053] Fig.25 yes Figure 2 A simplified schematic diagram of the magnetic field distribution of the voice coil and magnetic circuit components of the loudspeaker shown;

[0054] Fig.26 yes Fig.21 A partially simplified structural schematic diagram of a vibration assembly and a magnetic circuit assembly of a loudspeaker in another embodiment is shown;

[0055] Fig. 27 yes Fig. 20 The schematic diagram of the cross-sectional structure of the speaker and the internal components of the electronic device in some embodiments is shown;

[0056] Fig.28 yes Fig. 27 The schematic diagram of the comparison of the resonance curves of the loudspeaker shown is compared with that of the existing loudspeaker. DETAILED DESCRIPTION

[0057] The embodiments of the present application are described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0058] In the description of the implementation mode 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. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. The directional terms mentioned in the implementation mode of the present application, such as "upper", "lower", "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 implementation mode of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the implementation mode of the present application. "Multiple" means at least two.

[0059] In the embodiments of the present application, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features.

[0060] In the implementation manner of the present application, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0061] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in another embodiment", etc. appearing in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "include", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0062] It is to be understood that the specific implementations described herein are only used to explain the relevant embodiments, rather than to limit the embodiments. It should also be noted that, for ease of description, only the parts related to the embodiments are shown in the drawings.

[0063] Figure 1a It is a structural diagram of an implementation of an electronic device 1000 provided in an implementation manner of the present application. Figure 1b yes Figure 1a The cross-sectional structure diagram of an electronic device 1000 in one embodiment is shown along AA. Figure 2 yes Figure 1b The structure diagram of the speaker 100 of the electronic device 1000 shown in one embodiment.

[0064] like Figure 1a to Figure 2 As shown, the electronic device 1000 can be an electronic device 1000 such as a wearable device such as a headset, which realizes audio input by approaching the human ear canal or by inserting it into the ear. Among them, the wearable device can also be smart glasses or a smart head display. When the electronic device 1000 is a headset, the headset can be a wired headset or a true wireless stereo (TrueWireless Stereo, TWS) headset. Among them, the TWS headset can be wirelessly connected to external devices such as mobile phones, computers, laptops, vehicle-mounted devices or wearable devices. The following will be explained by taking the electronic device 1000 as a TWS headset as an example. It should be noted that in order to clearly illustrate the structure of the electronic device 1000, the attached Figure 1a and attached Figure 1bThe electronic device 1000 shown in FIG. 1 only shows one earphone. Of course, the electronic device 1000 may also be a pair of earphones.

[0065] Exemplarily, the electronic device 1000 may include a speaker 100 and a device housing 200. The speaker 100 may be disposed inside the device housing 200. The number of speakers 100 may be one or more. The device housing 200 may be provided with a sound outlet 201. The sound outlet 201 may connect the inside of the electronic device 1000 to the outside. When the electronic device 1000 is worn on the ear, the sound outlet 201 may face the external auditory canal of the ear or extend into the external auditory canal of the ear. At this time, the sound waves emitted by the electronic device 1000 may be transmitted to the external auditory canal of the ear through the sound outlet 201.

[0066] Figure 3 yes Figure 2 The illustrated schematic diagram is an exploded structural diagram of the speaker 100 in some embodiments.

[0067] like Figure 2 and Figure 3 As shown, the speaker 100 may include a housing 10, a vibration assembly 20, a magnetic circuit assembly 30, a circuit board 40, and a support member 50. The vibration assembly 20 may include a diaphragm 21 and a voice coil 22. The magnetic circuit assembly 30 may include a first magnet 31, a second magnet 32, a first upper magnetic conductor 33, a second upper magnetic conductor 34, and a lower magnetic conductor 35.

[0068] Exemplarily, the circuit board 40 can be a hard circuit board, a soft circuit board or a hard-soft combination circuit board. The material of the first magnet 31 and the second magnet 32 ​​can be a hard magnetic material, also known as a permanent magnetic material (permanent magnet) or a permanent magnetic material (permanent magnet). It can be understood that the hard magnetic material is a permanent magnetic material that can retain magnetism for a long time. For example, a magnet, etc. The material of the first upper magnetic conductor 33, the second upper magnetic conductor 34 and the lower magnetic conductor 35 can be a magnetic conductive material. Among them, the magnetic permeability of the magnetic conductive material is greater than the magnetic permeability of air.

[0069] In some embodiments, the speaker 100 may not include the circuit board 40 and the support member 50. The magnetic circuit assembly 30 may not include the second upper magnetic conductor 34 and the lower magnetic conductor 35.

[0070] Figure 4 yes Figure 3 The illustrated diagram is a schematic diagram of the assembly structure of the first magnet 31 , the second magnet 32 ​​and the lower magnetic conductor 35 in one embodiment. Figure 5 yes Figure 2 The illustrated structure is a partial cross-sectional schematic diagram of a loudspeaker 100 in one embodiment cut along line BB.

[0071] like Figure 4 and Figure 5 As shown, the first magnet 31 can be roughly disc-shaped. The second magnet 32 ​​can be roughly ring-shaped. The inner circumferential side wall of the second magnet 32 ​​can surround a first through hole 321. The shape of the first through hole 321 can be compatible with the shape of the first magnet 31. The first magnet 31 can be located in the first through hole 321 of the second magnet 32. The first magnet 31 and the second magnet 32 ​​can be coaxially arranged, that is, the central axis of the first magnet 31 can coincide with the central axis of the second magnet 32. In this way, the magnetic field distribution formed by the first magnet 31 and the second magnet 32 ​​is relatively symmetrical.

[0072] It should be noted that the coaxial arrangement of the first magnet 31 and the second magnet 32 ​​can be such that the central axes of the two completely coincide, or the distance between the central axis of the first magnet 31 and the central axis of the second magnet 32 ​​is within a certain error range, for example, the distance between the central axis of the first magnet 31 and the central axis of the second magnet 32 ​​is less than 0.1 mm. Alternatively, the central axis of the first magnet 31 can also form an angle with the central axis of the second magnet 32 ​​within a certain range, for example, the angle formed between the central axis of the first magnet 31 and the central axis of the second magnet 32 ​​can be less than 1°. It can be understood that the coaxial arrangement of the first magnet 31 and the second magnet 32 ​​makes the magnetic field formed by the first magnet 31 and the second magnet 32 ​​more symmetrical, which is beneficial to improving the acoustic performance of the speaker 100.

[0073] Exemplarily, the thickness of the first magnet 31 may be equal to the thickness of the second magnet 32. In this way, the magnetic field distribution formed by the first magnet 31 and the second magnet 32 ​​is relatively symmetrical, which is beneficial to improving the acoustic performance of the speaker 100. For ease of understanding, the thickness direction of the speaker 100 is defined as the first direction. The dimensions of each component of the speaker 100 in the first direction are the thickness of the component in the first direction, which may be referred to as the thickness of the component hereinafter. In other embodiments, the thickness of the first magnet 31 may not be equal to the thickness of the second magnet 32. For example, the thickness of the first magnet 31 may also be less than the thickness of the second magnet 32.

[0074] Exemplarily, the outer peripheral side wall of the first magnet 31 may be spaced apart from the inner peripheral side wall of the second magnet 32, that is, a magnetic gap 30a may be formed between the outer peripheral side wall of the first magnet 31 and the inner peripheral side wall of the second magnet 32. Wherein, when the central axis of the first magnet 31 coincides with the central axis of the second magnet 32, the width of the magnetic gap 30a at any position is equal, that is, the magnetic gap 30a may be of equal width. Wherein, the width of the magnetic gap 30a may refer to the distance between the outer peripheral side wall of the first magnet 31 and the inner peripheral side wall of the second magnet 32. In some embodiments, the outer peripheral side wall of the first magnet 31 may also contact the inner peripheral side wall of the second magnet 32. That is, the magnetic gap 30a may not be formed between the outer peripheral side wall of the first magnet 31 and the inner peripheral side wall of the second magnet 32.

[0075] Exemplarily, the first magnet 31 and the second magnet 32 ​​can be located on the same side of the lower magnet 35 and fixedly connected to the lower magnet 35. The lower magnet 35 can be roughly disc-shaped. The central axis of the lower magnet 35 can also coincide with the central axis of the first magnet 31. It should be understood that the coincidence of the central axis of the lower magnet 35 with the central axis of the first magnet 31 and the coincidence of the two central axes in the following text can also refer to the definition that the central axis of the first magnet 31 can coincide with the central axis of the second magnet 32. It can be understood that the present embodiment can enhance the overall magnetic field strength of the magnetic circuit assembly 30 by arranging the lower magnet 35 on the same side of the first magnet 31 and the second magnet 32, thereby effectively improving the efficiency of the speaker 100. Under the same magnetic field strength conditions, the speaker 100 in the present embodiment can enhance the magnetic field strength by arranging the lower magnet 35, so that the size of the first magnet 31 and / or the second magnet 32 ​​can be made smaller, which is conducive to realizing the miniaturization of the entire speaker 100.

[0076] Figure 6 yes Figure 3 A schematic structural diagram of the circuit board 40 of the loudspeaker 100 is shown. Figure 7 yes Figure 3 The illustrated schematic diagram is a schematic assembly structure diagram of a partial structure of a loudspeaker 100 in one embodiment. Figure 8 yes Figure 2 The illustrated diagram is a partial cross-sectional structural diagram of a loudspeaker 100 in one embodiment cut along line BB.

[0077] like Figures 6 to 8As shown, the circuit board 40 may include a main body 41 and an extension 42. The main body 41 may be roughly annular. The inner peripheral side wall of the main body 41 may surround a second through hole 411. The extension 42 may be fixedly connected to the outer peripheral side wall of the main body 41. It should be understood that although the circuit board 40 is divided into two parts for introduction in this embodiment, it does not affect that the circuit board 40 can be an integrally formed structure, that is, the main body 41 and the extension 42 can be integrally formed. Among them, Figures 6 to 8 In the figure, the fixing portion and the extending portion 42 of the circuit board 40 are schematically divided by dotted lines.

[0078] Exemplarily, the main body 41 of the circuit board 40 can be fixedly connected to the surface of the second magnet 32 ​​facing away from the lower magnetic conductor 35. At this time, at least a portion of the extension portion 42 of the circuit board 40 can be exposed relative to the outer peripheral side wall of the second magnet 32. The extension portion 42 of the circuit board 40 can be used to electrically connect an external device (such as a power supply) of the speaker 100. The second through hole 411 of the main body 41 of the circuit board 40 can be connected to the first through hole 321 of the second magnet 32. The second through hole 411 can expose the first magnet 31, a portion of the second magnet 32, and the magnetic gap 30a between the first magnet 31 and the second magnet 32.

[0079] Fig. 9 yes Figure 3 FIG. 1 is a schematic structural diagram of the second upper magnetic conductor 34 of the loudspeaker 100 shown in FIG. Fig.10 yes Fig. 9 The structure diagram of the second upper magnetic conductor 34 shown in FIG.

[0080] like Fig. 9 and Fig.10 As shown, the second upper magnetic conductor 34 can be partially broken to form a gap 34a. At this time, the second upper magnetic conductor 34 can be approximately ring-shaped. The inner peripheral side wall of the second upper magnetic conductor 34 can approximately surround the third through hole 34b. The second upper magnetic conductor 34 can include an upper surface 341 and a lower surface 342 arranged in opposite directions.

[0081] Exemplarily, the second upper magnetic conductor 34 may be provided with a first avoidance step 342a. The opening of the first avoidance step 342a may be formed on the lower surface 342 and the outer peripheral side of the second upper magnetic conductor 34. The first avoidance step 342a may be connected to the third through hole 34b through the notch 34a.

[0082] Exemplarily, the upper surface 341 may include a first region 3411, a second region 3412, and a transition region 3413. The transition region 3413 may be connected between the first region 3411 and the second region 3412. Among them, the first region 3411 may be located on a side of the transition region 3413 close to the outer peripheral side wall of the second upper magnetic conductor 34. The second region 3412 may be located on a side of the transition region 3413 close to the inner peripheral side wall of the second upper magnetic conductor 34. In the first direction, the distance from the first region 3411 to the lower surface 342 may be greater than the distance from the second region 3412 to the lower surface 342, that is, the first region 3411 may be higher than the second region 3412, and the first region 3411 and the second region 3412 may have a thickness difference in the first direction. At this time, a second avoidance step 341a may be formed between the transition region 3413 and the second region 3412. The second avoidance step 341a may connect the third through hole 34b and the notch 34a.

[0083] Fig.11 yes Figure 3 The illustrated schematic diagram is a schematic assembly structure diagram of a partial structure of a loudspeaker 100 in one embodiment. Fig.12 yes Figure 2 The illustrated schematic diagram is a cross-sectional structural diagram of a loudspeaker 100 in one embodiment cut along line BB. Fig.13 yes Figure 2 The shown diagram is a partial cross-sectional structural diagram of an embodiment of the loudspeaker 100 cut along CC.

[0084] like Figures 11 to 13 As shown, the first upper magnet 33 may be roughly disc-shaped. The first upper magnet 33 may be fixedly connected to the surface of the first magnet 31 facing away from the lower magnet 35. The width of the first upper magnet 33 (i.e., the diameter of the first upper magnet 33 in this embodiment) is the first width H1. The first width H1 may be smaller than the width of the first magnet 31 (i.e., the diameter of the first magnet 31 in this embodiment). At this time, the projection of the first upper magnet 33 in the first direction may not overlap with the second magnet 32. The projection of the first upper magnet 33 in the first direction may overlap with the first magnet 31. The width of the first upper magnet 33 may be greater than or equal to 0.5 mm. In this way, the first upper magnet 33 has a certain width so that the first upper magnet 33 can be fixed to the surface of the first magnet 31 by bonding or the like.

[0085] Exemplarily, the lower surface 342 of the second upper magnetic conductor 34 can be fixedly connected to the surface of the second magnet 32 ​​away from the lower magnetic conductor 35. The aperture of the third through hole 34b of the second upper magnetic conductor 34 can be greater than the width of the first upper magnetic conductor 33. At this time, the first upper magnetic conductor 33 can be located in the third through hole 34b of the second upper magnetic conductor 34.

[0086] Exemplarily, the aperture of the third through hole 34b of the second upper magnetic conductor 34 may also be greater than the width of the first magnet 31. At this time, the third through hole 34b of the second upper magnetic conductor 34 may expose a portion of the surface of the first magnet 31, a portion of the surface of the second magnet 32, the magnetic gap 30a between the first magnet 31 and the second magnet 32, and the first upper magnetic conductor 33.

[0087] Exemplarily, the main body 41 of the circuit board 40 may be located within the first avoidance step 342a of the second upper magnetic conductor 34. Part of the main body 41 of the circuit board 40 may be exposed relative to the notch 34a of the second upper magnetic conductor 34. Exemplarily, the extension portion 42 of the circuit board 40 may be fixedly connected to the portion of the main body 41 exposed from the notch 34a of the second upper magnetic conductor 34. In other embodiments, the extension portion 42 of the circuit board 40 may also be fixedly connected to other positions of the outer peripheral side wall of the main body 41. In some other embodiments, the main body 41 of the circuit board 40 may not be fixed to the second magnet 32, and the main body 41 of the circuit board 40 may also be fixed to the first avoidance step 342a of the second upper magnetic conductor 34.

[0088] Fig.14 yes Figure 3 A schematic diagram of the exploded structure of the vibration assembly 20 of the loudspeaker 100 is shown. Fig.15 yes Figure 2 The illustrated diagram is a partial cross-sectional structural diagram of a loudspeaker 100 in one embodiment cut along line BB. Fig.16a yes Fig.14 The structure schematic diagram of the assembly structure of the diaphragm 21 and the voice coil 22 is shown in another perspective. Fig.16b yes Fig.14 A top view of a voice coil 22 in one embodiment is shown.

[0089] like Figure 14 to Figure 16b As shown, the diaphragm 21 may be roughly disc-shaped. The diaphragm 21 may include a first vibration portion 21a and a second vibration portion 21b. The second vibration portion 21b may be roughly ring-shaped. The first vibration portion 21a may be located inside the second vibration portion 21b and fixedly connected to the second vibration portion 21b.

[0090] Exemplarily, the first vibration part 21a may include a first straight portion 211 and a first folded ring portion 212. The first straight portion 211 may be roughly annular. The first folded ring portion 212 may be located on the inner side of the first straight portion 211 and fixedly connected to the first straight portion 211. The second vibration part 21b may include a second straight portion 213 and a second folded ring portion 214. The second folded ring portion 214 may be fixedly connected between the first straight portion 211 and the second straight portion 213. It should be understood that although the diaphragm 21 is divided into four parts for introduction in this embodiment, it does not affect the fact that the diaphragm 21 can be an integrally formed structure, that is, the first folded ring portion 212, the first straight portion 211, the second folded ring portion 214 and the second straight portion 213 can be integrally formed.

[0091] Exemplarily, the first folded ring portion 212 may be roughly spherical. The second folded ring portion 214 may be roughly arc-shaped. Among them, the first folded ring portion 212 and the second folded ring portion 214 may be arched in the same direction. In this way, the diaphragm 21 has a bent portion (that is, the first folded ring portion 212 and the second folded ring portion 214 in this embodiment), which is beneficial to improve the displacement of the diaphragm 21 in its vibration direction. In other embodiments, the diaphragm 21 may not include the first folded ring portion 212 or the second folded ring portion 214. At this time, the diaphragm 21 has a folded ring portion. In some other embodiments, the diaphragm 21 may not include the first folded ring portion 212 and the second folded ring portion 214. At this time, the diaphragm 21 may be a planar diaphragm. The present application does not limit the specific shape of the diaphragm 21.

[0092] Exemplarily, the voice coil 22 can be fixedly connected to the first straight portion 211 of the diaphragm 21. At this time, the inner peripheral side wall of the voice coil 22 can enclose the first accommodation space 20a of the vibration assembly 20 together with the diaphragm 21, that is, the first accommodation space 20a can be located on the inner side of the voice coil 22. The inner width of the voice coil 22 is the second width H2. The second width H2 can be greater than or equal to 0.6 mm, that is, the width of the first accommodation space 20a can be greater than or equal to 0.6 mm. In this embodiment, the voice coil 22 is a circular ring. At this time, the inner width of the voice coil 22 can be the diameter of the voice coil hole. In other embodiments, the voice coil 22 can also be roughly in the shape of a long strip, with two straight sides parallel to each other. At this time, the inner width of the voice coil 22 is the distance between the two straight sides of the voice coil 22.

[0093] For example, the voice coil 22 may be formed by a wire being wound multiple times along a plane perpendicular to the first direction. In this case, the plane is the winding plane of the voice coil 22. The winding plane of the voice coil 22 may be perpendicular to the first direction. For ease of understanding, Fig.16bThe top view of the voice coil 22 roughly illustrates the winding method of the voice coil 22. The two ends of the wire can respectively constitute the first end 221 and the second end 222 of the voice coil 22. The distance between the inner peripheral side wall and the outer peripheral side wall of the voice coil 22 is the third width H3. The third width H3 can be greater than the thickness of the voice coil 22. At this time, the voice coil 22 can be a planar voice coil. In some embodiments, the voice coil 22 can also be formed by multiple wires being wound together along a plane perpendicular to the first direction for multiple times. Among them, the multiple wires can be arranged along the first direction.

[0094] Fig.17 yes Figure 2 The illustrated diagram is a partial cross-sectional structural diagram of a loudspeaker 100 in one embodiment cut along line BB. Fig.18 yes Figure 3 The schematic diagram of the assembly structure of the vibration component 20 and the magnetic circuit component 30 of the loudspeaker 100 in one embodiment is shown. For ease of understanding, Fig.18 The diaphragm 21 in the vibration assembly 20 is hidden.

[0095] like Fig.17 and Fig.18 As shown, the second straight portion 213 of the diaphragm 21 can be fixedly connected to the first area 3411 of the upper surface 341 of the second upper magnetic conductor 34. The voice coil 22 can be located on the side of the diaphragm 21 close to the magnetic circuit assembly 30. The projection of the voice coil 22 in the first direction can overlap with part of the first magnet 31 and / or part of the second magnet 32. In this embodiment, the projection of the voice coil 22 in the first direction can overlap with part of the first magnet 31 and part of the second magnet 32. At this time, the projection of the voice coil 22 in the first direction can overlap with the magnetic gap 30a of the magnetic circuit assembly 30. Exemplarily, the voice coil 22 can be spaced apart from the first magnet 31 and the second magnet 32 ​​in the first direction, so as to reserve space for the vibration of the voice coil 22 in the first direction. The second avoidance step 341a of the second upper magnetic conductor 34 can also be used to avoid the diaphragm 21, so as to reserve space for the vibration of the diaphragm 21 in the first direction.

[0096] Exemplarily, part of the first upper magnet 33 may be located in the first accommodation space 20a of the vibration assembly 20, that is, part of the first upper magnet 33 may be located on the inner side of the voice coil 22. Part of the voice coil 22 may be located in the third through hole 34b of the second upper magnet 34, that is, the second upper magnet 34 may be located on the side of the voice coil 22 facing away from the first upper magnet 33. At this time, part of the voice coil 22 may be located between the first upper magnet 33 and the second upper magnet 34. The distance between the second upper magnet 34 and the voice coil 22 may be greater than or equal to 0.05 mm. In this way, there is a gap between the second upper magnet 34 and the outer peripheral side wall of the voice coil 22, so that the voice coil 22 can be prevented from colliding with the second upper magnet 34 due to the displacement along the width direction of the voice coil 22 (that is, the radial direction of the voice coil 22 in this embodiment) during the vibration process, thereby affecting the acoustic performance of the speaker 100.

[0097] Exemplarily, the width of the first upper magnet 33 may be smaller than the inner width of the voice coil 22. In some embodiments, the difference between the width of the first upper magnet 33 and the inner width of the voice coil 22 may be greater than or equal to 0.1 mm. In this way, there is a gap between the first upper magnet 33 and the inner peripheral side wall of the voice coil 22, so that the voice coil 22 can be prevented from colliding with the first upper magnet 33 due to the displacement along the width direction of the voice coil 22 (that is, the radial direction of the voice coil 22 in this embodiment) during the vibration process, thereby affecting the acoustic performance of the speaker 100. In some embodiments, the difference between the width of the first upper magnet 33 and the inner width of the voice coil 22 may be in the range of 0.1 mm to 0.2 mm. In this way, the speaker 100 can avoid the collision between the voice coil 22 and the first upper magnet 33, while the overall size of the speaker 100 is small, which is conducive to realizing the miniaturization of the speaker 100.

[0098] Exemplarily, the first end 221 of the voice coil 22 may extend to the notch 34a of the second upper magnetic conductor 34 and be electrically connected to the circuit board 40. The second end 222 of the voice coil 22 may also extend to the notch 34a of the second upper magnetic conductor 34 and be electrically connected to the circuit board 40. In this way, the voice coil 22, the circuit board 40, and the external components of the speaker 100 may form a current loop. For example, the external components of the speaker 100 may transmit a current signal to the voice coil 22 through the circuit board 40.

[0099] In some embodiments, a solder joint protection glue 43 may be further provided on the circuit board 40. The solder joint protection glue 43 may be located at the notch 34a of the second upper magnetic conductor 34 and fixedly connected to the main body 41 ( Figures 6 to 8The solder joint protection glue 43 is also shown. The solder joint protection glue 43 can simultaneously cover the connection position between the first end 221 of the voice coil 22 and the circuit board 40, and the connection position between the second end 222 of the voice coil 22 and the circuit board 40. Fig.18 The first end 221 and the second end 222 of the voice coil 22 are indicated by dotted lines. In this way, the solder joint protection glue 43 can be used to prevent dust, foreign matter and other impurities from affecting the reliability of the electrical connection between the voice coil 22 and the circuit board 40. In other embodiments, the speaker 100 may not include the circuit board 40, and the vibration component 20 may lead the first end 221 and the second end 222 of the voice coil 22 out of the notch 34a of the second upper magnetic conductor 34, and directly electrically connect to the external device of the speaker 100.

[0100] Fig.19 yes Figure 3 The illustrated schematic diagram is a schematic assembly structure diagram of a partial structure of a loudspeaker 100 in one embodiment. Fig. 20 yes Figure 2 The illustrated diagram is a partial cross-sectional structural diagram of a loudspeaker 100 in one embodiment cut along line BB. Fig.21 yes Figure 2 The shown diagram is a partial cross-sectional structural diagram of an embodiment of the loudspeaker 100 cut along CC.

[0101] like Figures 19 to 21 As shown, the support member 50 may be roughly annular. For example, the support member 50 may be a steel ring. The support member 50 may be located on a side of the diaphragm 21 away from the voice coil 22, and may be fixedly connected to the second straight portion 213 of the diaphragm 21. The housing 10 may include a top 11 and a frame 12. The frame 12 may be fixedly connected to the periphery of the top 11. In some embodiments, the support member 50 may also be integrally formed with the housing 10.

[0102] Exemplarily, the top 11 of the housing 10 may include a first surface 111 and a second surface 112 that are disposed opposite to each other. The first surface 111 may be a surface of the top 11 away from the frame 12. The second surface 112 may be a surface of the top 11 facing the frame 12. The second surface 112 of the top 11 may be a surface of the support member 50 that is fixedly connected to the surface facing away from the diaphragm 21. At this time, the housing 10 and the lower magnetic conductor 35 may enclose the internal space of the speaker 100. The diaphragm 21 may divide the internal space of the speaker 100 into a front cavity 100a and a rear cavity 100b that are not connected to each other. The front cavity 100a is located on the side of the diaphragm 21 away from the voice coil 22. The rear cavity 100b is located on the side of the diaphragm 21 close to the voice coil 22. The space between the outer peripheral side wall of the voice coil 22 and the frame 12 of the housing 10 may constitute a second accommodation space 20b of the vibration assembly 20. Part of the second upper magnetic conductor 34 may be located in the second accommodation space 20b.

[0103] For example, the frame portion 12 of the housing 10 may be provided with an escape hole 12a. The extension portion 42 of the circuit board 40 may extend to the external space of the speaker 100 through the escape hole 12a of the housing 10 and be electrically connected to the external device of the speaker 100. The top 11 of the housing 10 may be provided with a sound outlet hole 11a. The sound outlet hole 11a may connect the front cavity 100a of the speaker 100 with the external space of the speaker 100.

[0104] Exemplarily, the polarity of the portion of the first magnet 31 close to the voice coil 22 is opposite to the polarity of the portion of the second magnet 32 ​​close to the voice coil 22. The polarity of the portion of the first magnet 31 away from the voice coil 22 is also opposite to the polarity of the portion of the second magnet 32 ​​away from the voice coil 22. That is, the polarity direction of the first magnet 31 may be opposite to the polarity direction of the second magnet 32. The polarity direction refers to the direction in which the N pole of the magnet points to the S pole.

[0105] Exemplarily, the polarity of the portion of the first magnet 31 close to the voice coil 22 may be an S pole, and the polarity of the portion of the first magnet 31 away from the voice coil 22 may be an N pole. The polarity of the portion of the second magnet 32 ​​close to the voice coil 22 may be an N pole, and the polarity of the portion of the second magnet 32 ​​away from the voice coil 22 may be an S pole. At this time, the magnetic field lines of the magnetic field generated by a portion of the first magnet 31 and the second magnet 32 ​​may pass through the voice coil 22 basically in a horizontal direction. When the voice coil 22 is energized, the voice coil 22 may generate a Lorentz force along a first direction, and the voice coil 22 may move to cut the magnetic flux lines as the Lorentz force moves, and pushes the diaphragm 21 to vibrate in the first direction. It should be understood that Fig. 20 Only one embodiment of the magnetization method of the first magnet 31 and the second magnet 32 ​​is illustrated. The first magnet 31 and the second magnet 32 ​​may also be magnetized in other ways, which are not specifically limited in the present application.

[0106] In some embodiments, sealant may be filled between the frame portion 12 of the housing 10 and the lower magnetic conductor 35 to seal the rear cavity 100b of the speaker 100. In other embodiments, the speaker 100 may further include a back cover. The back cover may be located on the side of the frame portion 12 away from the top 11 and fixedly connected to the periphery of the frame portion 12. At this time, the housing 10 and the back cover may enclose the internal space of the speaker 100. In some other embodiments, when the speaker 100 is applied to the electronic device 1000, the surface of the lower magnetic conductor 35 of the speaker 100 that faces away from the first magnet 31 may be fixed on other devices inside the electronic device 1000. At this time, the surface of the other device to which the lower magnetic conductor 35 is fixedly connected may enclose the internal space of the speaker 100 with the housing 10. That is, the speaker 100 may use other devices inside the electronic device 1000 to seal its internal space.

[0107] Fig. 22It is a simplified schematic diagram of the magnetic field distribution of the voice coil, the first magnet, and the second magnet of the planar diaphragm speaker in some embodiments. Fig.23 yes Figure 2 The figure shows a simplified schematic diagram of the magnetic field distribution of the voice coil 22 , the first magnet 31 , the second magnet 32 ​​and the first upper magnetic conductor 33 of the loudspeaker 100 . Fig.24 yes Figure 2 The figure shows a simplified schematic diagram of the magnetic field distribution of the voice coil 22 , the first magnet 31 , the second magnet 32 ​​, the first upper magnetic conductor 33 and the lower magnetic conductor 35 of the loudspeaker 100 . Fig.25 yes Figure 2 The figure shows a simplified schematic diagram of the magnetic field distribution of the voice coil 22 and the magnetic circuit assembly 30 of the loudspeaker 100.

[0108] Please also read Figure 22 to Figure 25 It is understandable that the magnetic circuit components in general planar diaphragm speakers can only conduct magnetism through the air so that the magnetic flux lines can pass through the voice coil. Due to the low magnetic permeability of air, it is difficult for the magnetic flux lines to pass through the air, resulting in a low magnetic induction intensity at the voice coil position (such as Fig. 22 The efficiency of the planar diaphragm speaker is low, which affects the high-pitched effect of the planar diaphragm speaker. The speaker 100 in this embodiment is provided with a first upper magnetic conductor 33 having a magnetic conductive function on the inner side of the voice coil 22. The first upper magnetic conductor 33 can gather the magnetic flux lines in the magnetic field generated between the first magnet 31 and the second magnet 32 ​​to the position of the voice coil 22 (as shown in FIG. Fig.23 As shown), the force factor of the magnetic field can be effectively increased, the magnetic induction intensity at the position of the voice coil 22 can be enhanced, the efficiency of the speaker 100 can be improved, and the high-frequency effect of the speaker 100 can be enhanced. At the same time, compared with the general planar diaphragm speaker, which needs to increase the size of the magnet to increase the magnetic induction intensity at the position of the voice coil, the speaker 100 in this embodiment can greatly increase the magnetic induction intensity at the position of the voice coil 22 by only setting the first upper magnetic conductor 33 on the inner side of the voice coil 22, and the first upper magnetic conductor 33 can use the space between the diaphragm 21 and the first magnet 31, so that the first upper magnetic conductor 33 can enhance the magnetic induction intensity at the position of the voice coil 22 without additionally increasing the overall width and thickness of the speaker 100. In other words, under the condition that the magnetic induction intensity at the position of the voice coil 22 is the same, the size of the speaker 100 in this embodiment can be made smaller, which is conducive to realizing the miniaturization of the speaker 100.

[0109] Secondly, the first upper magnetic conductor 33 in this embodiment is fixedly connected to the first magnet 31, so that the first upper magnetic conductor 33 can be in direct contact with the first magnet 31, and there is no gap between the first upper magnetic conductor 33 and the first magnet 31. In this way, after the magnetic flux lines pass through the first magnet 31, the magnetic flux lines can be directly conducted through the first upper magnetic conductor 33 without passing through the air. The first upper magnetic conductor 33 has a high magnetic permeability, which makes it easier for the magnetic flux lines to pass through the first upper magnetic conductor 33, so that more of them can be gathered at the position of the voice coil 22, thereby increasing the force factor of the magnetic field, improving the magnetic induction intensity at the position of the voice coil 22, and improving the efficiency of the speaker 100.

[0110] In addition, the speaker 100 in the present embodiment further includes a second upper magnet 34, and the second upper magnet 34 is located outside the voice coil 22. In this way, the second upper magnet 34 can further converge the magnetic flux lines in the magnetic field generated between the first magnet 31 and the second magnet 32 ​​to the position of the voice coil 22, thereby further increasing the force factor of the magnetic field, enhancing the magnetic induction intensity at the position of the voice coil 22, improving the efficiency of the speaker 100, improving the output sound quality of the speaker 100, and enhancing the treble effect of the speaker 100. At the same time, magnets are provided on both the inside and outside of the voice coil 22 (that is, the first upper magnet 33 and the second upper magnet 34 in the present embodiment), so that the magnetic field distribution on the inside and outside of the voice coil 22 is relatively symmetrical (such as Fig.24 As shown), it is beneficial to improve the acoustic performance of the speaker 100.

[0111] In addition, the second upper magnetic conductor 34 in this embodiment is fixedly connected to the second magnet 32, so that the second upper magnetic conductor 34 can be in direct contact with the second magnet 32, and there is no gap between the second upper magnetic conductor 34 and the second magnet 32. In this way, after the magnetic flux lines pass through the second magnet 32, the magnetic flux lines can be directly conducted through the second upper magnetic conductor 34 without passing through the air. The second upper magnetic conductor 34 has a high magnetic permeability, which makes it easier for the magnetic flux lines to pass through the second upper magnetic conductor 34, so that more of them can be gathered at the position of the voice coil 22, thereby increasing the force factor of the magnetic field, improving the magnetic induction intensity at the position of the voice coil 22, and improving the efficiency of the speaker 100.

[0112] In addition, the speaker 100 in this embodiment further includes a lower magnetic conductor 35. The lower magnetic conductor 35 is fixed to the side of the first magnet 31 facing away from the voice coil 22, so as to further enhance the overall magnetic field strength of the magnetic circuit assembly 30 and increase the force factor of the magnetic field, which is beneficial to improving the efficiency of the speaker 100 (such as Fig.25As shown). At the same time, under the condition of the same magnetic field strength, the speaker 100 in this embodiment enhances the magnetic field strength by setting the lower magnetic conductor 35, so that the size of the first magnet 31 and / or the second magnet 32 ​​can be made smaller, which is conducive to the miniaturization of the entire speaker 100. Alternatively, under the condition that the overall thickness of the speaker 100 remains unchanged, the lower magnetic conductor 35 can be set by sacrificing part of the thickness of the first magnet 31 and the second magnet 32, so that the force factor of the magnetic field can be increased without changing the thickness of the speaker 100, and the magnetic induction intensity at the position of the voice coil 22 can be increased, thereby improving the efficiency of the speaker 100. In some embodiments, the configuration of the magnetic circuit assembly 30 in this embodiment can make the magnetic field force factor of the speaker 100 Fig. 22 Based on the speakers shown, the improvement is about 30%.

[0113] In other embodiments, the voice coil 22 may be in the shape of an elongated strip with two straight sides parallel to each other. The width direction of the voice coil 22 is the arrangement direction of the two straight sides of the voice coil 22. The second magnet 32 ​​may also include a first sub-magnet and a second sub-magnet. The first magnet 31, the first sub-magnet and the second sub-magnet may all be in the shape of an elongated strip. The first sub-magnet, the first magnet 31 and the second sub-magnet may be arranged in sequence along the width direction of the first magnet 31. The first magnet 31 may be located between the first sub-magnet and the second sub-magnet, that is, the first magnet 31 may be located on the inner side of the second magnet 32. The width direction of the first magnet 31 may be parallel to the width direction of the voice coil 22. The polarization directions of the first magnet 31, the first sub-magnet and the second sub-magnet may all be parallel to the first direction. Among them, the polarization direction of the first sub-magnet may be the same as the polarization direction of the second sub-magnet. The polarization direction of the first magnet 31 may be different from the polarization direction of the second magnet 32. At this time, the shapes of other components of the loudspeaker 100 (such as the voice coil 22, the first upper magnetic conductor 33, etc.) can also be correspondingly long strips.

[0114] In some other embodiments, the magnetic circuit assembly 30 may further include a fourth magnet and a fifth magnet. The multiple magnets in the magnetic circuit assembly 30 may be arranged in a Haier shell array to enhance the magnetic induction intensity at the position of the voice coil 22. The present application does not specifically limit the shape, quantity and arrangement position of the magnets in the magnetic circuit assembly 30.

[0115] Fig.26 yes Fig.21 The illustrated diagram is a partially simplified structural diagram of the vibration assembly 20 and the magnetic circuit assembly 30 of the loudspeaker 100 in another embodiment.

[0116] like Fig.26 As shown, the structures of the vibration component 20 and the magnetic circuit component 30 of the speaker 100 in this embodiment are similar to Fig.21The structures of the vibration assembly 20 and the magnetic circuit assembly 30 shown are substantially the same, and the similarities are not repeated here. The differences between the two will be described below. The first vibration part 21a of the diaphragm 21 in this embodiment may include a first connection part 215, a first main body part 216, a second connection part 217 and a second main body part 218. The first connection part 215, the first main body part 216 and the second connection part 217 may all be annular. The second main body part 218 may be located on the inner side of the first connection part 215 and fixedly connected to the first connection part 215. The second connection part 217 may be located on the side of the first connection part 215 facing away from the second main body part 218. The first main body part 216 may be connected between the first connection part 215 and the second connection part 217. The second connection part 217 may be connected between the second vibration part 21b and the first main body part 216. The voice coil 22 may be a conductor and embedded in the first main body part 216. The surface of the voice coil 22 facing the first magnet 31 may be exposed relative to the first main body part 216. The voice coil 22 may be formed by a conductor being wound multiple times along a plane perpendicular to the first direction, that is, the winding plane of the voice coil 22 may be perpendicular to the first direction. The distance between the inner peripheral side wall and the outer peripheral side wall of the voice coil 22 may be greater than the thickness of the voice coil 22. In this case, the voice coil 22 may be a planar voice coil. It should be understood that Fig.26 In the figure, the first connecting portion 215, the first main portion 216, the second connecting portion 217 and the second main portion 218 of the first vibration portion 21a are schematically divided by dotted lines.

[0117] Exemplarily, in the first direction, the distance from the first main body part 216 to the first magnet 31 may be less than the distance from the second main body part 218 to the first magnet 31. At this time, in the first direction, there may be a thickness difference between the first main body part 216 and the second main body part 218. The first connecting part 215 may enclose a first accommodating space 20a of the vibration assembly 20 with the second main body part 218. The first accommodating space 20a may be used to accommodate part of the first upper magnetic conductor 33. Part of the first upper magnetic conductor 33 may be located on the inner side of the first connecting part 215, that is, part of the first upper magnetic conductor 33 may be located on the inner side of the voice coil 22. The inner width of the first connecting part 215 is the fourth width. The fourth width may be greater than or equal to 0.6 mm. It should be understood that the definition of the inner width of the first connecting part 215 may refer to the definition of the inner width of the voice coil 22. No further details are given here.

[0118] For example, the second connecting portion 217 of the first vibration portion 21a can be connected to the second vibration portion 21b and the housing 10 (please refer to Fig.21 The second accommodating space 20b can be used to accommodate part of the second upper magnetic conductor 34.

[0119] It can be understood that the speaker 100 in this embodiment embeds the voice coil 22 in the first main body portion 216 of the diaphragm 21 and sinks the first main body portion 216 in the direction close to the first magnet 31, so that the vibration component 20 can realize that the voice coil 22 is embedded in the diaphragm 21. At the same time, the inner side of the voice coil 22 of the vibration component 20 can still have a first accommodating space 20a for storing the first upper magnetic conductor 33, so that the first upper magnetic conductor 33 can be set on the inner side of the voice coil 22 to enhance the magnetic induction intensity at the position of the voice coil 22, thereby improving the efficiency of the speaker 100.

[0120] Fig. 27 yes Fig. 20 The illustrated diagram is a cross-sectional structural diagram of a speaker 100 and an internal component 300 of an electronic device 1000 in some embodiments. Fig.28 yes Fig. 27 The schematic diagram of the resonance curve comparison between the loudspeaker 100 and the existing loudspeaker is shown. It should be noted that: Fig.28 The solid line in represents the resonance curve of the loudspeaker 100 in this embodiment, and the dotted line represents the resonance curve of the conventional loudspeaker 100 .

[0121] like Fig. 27 and Fig.28 As shown, in some embodiments, the top 11 of the housing 10 may further include a first portion 113, a second portion 114, and a transition portion 115. The transition portion 115 may be connected between the first portion 113 and the second portion 114. The first portion 113 and the second portion 114 have different heights, that is, there is a height difference between the first portion 113 and the second portion 114. The height L1 of the first portion 113 refers to the distance between the first portion 113 and the diaphragm 21 in the first direction, and so on. At this time, an avoidance space 11b ( Fig. 20 The avoidance space 11b) is also illustrated from another angle.

[0122] Exemplarily, the height of the first portion 113 may be greater than the height of the second portion 114. That is, the first portion 113 of the top portion 11 may protrude relative to the second portion 114 in a direction away from the diaphragm 21. The height of the first portion 113 may be greater than or equal to 0.2 mm. Exemplarily, the height of the first portion 113 may be in the range of 0.2 mm to 0.3 mm.

[0123] For example, the sound outlet hole 11a of the housing 10 may be located at the first portion 113 of the top portion 11. The diameter of the sound outlet hole 11a may be in the range of 0.8 mm to 1.4 mm. The height of the sound outlet hole 11a (i.e., the thickness of the first portion 113 of the top portion 11 in the first direction in this embodiment) may be in the range of 0.1 mm to 0.3 mm.

[0124] When the speaker 100 is applied to the electronic device 1000, the internal device 300 (e.g., microphone, sensor, etc.) of the electronic device 1000 can be stacked in the first direction with the second portion 114 of the top 11 of the housing 10. The first portion 113 of the top 11 can protrude relative to the second portion 114 in the direction toward the internal device 300.

[0125] It can be understood that, compared with the existing speakers, in order to ensure the overall axial symmetric design of the speaker, the thickness of the module will remain the same, that is, the distance from the top of the shell to the diaphragm is basically the same, so that the thickness of the speaker is limited by the stacking method of the components inside the electronic device 1000. In this embodiment, the top 11 of the shell 10 of the speaker 100 may include two first parts 113 and second parts 114 with different heights. The first part 113 of the top 11 can be raised relative to the second part 114. Among them, the second part 114 of the top 11 can be stacked with the internal components 300 of the electronic device 1000 in the first direction, and the first part 113 of the top 11 can be raised relative to the second part 114 in the direction toward the internal components 300. In this way, on the one hand, the volume of the front cavity 100a of the speaker 100 can be increased without affecting the stacking of the internal components 300 of the electronic device 1000; on the other hand, the sound outlet 11a located in the first part 113 of the top 11 can be closer to the sound outlet of the electronic device 1000. In other words, the housing 10 of the loudspeaker 100 in this embodiment can be a variable height housing. By providing a housing 10 with portions of different heights (i.e., the first portion 113 and the second portion 114 of the top 11 in this embodiment), the volume of the front cavity 100a can be increased without affecting the stacking of the components 300 inside the electronic device 1000, and the sound outlet 11a can be made closer to the sound outlet of the electronic device 1000, so that the loudspeaker 100 can create additional resonance peaks in the high frequency band (such as Fig.28 As shown), the sensitivity of the loudspeaker 100 in the high frequency band is improved, and the bandwidth of the entire loudspeaker 100 is widened, so that a loudspeaker 100 with better treble effect can be obtained.

[0126] It should be noted that, in the absence of conflict, the features in the embodiments of the present application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of the present application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0127] It should be noted that all the above drawings are illustrative illustrations of the present application and do not represent the actual size of the product. Moreover, the size ratio relationship between the components in the drawings is not intended to limit the actual product of the present application.

[0128] The above are only some implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A loudspeaker (100), characterized in that: The speaker (100) comprises a first magnet (31), a second magnet (32), a diaphragm (21), a voice coil (22) and a first upper magnetic conductor (33), wherein the first magnet (31) is located on the inner side of the second magnet (32), the diaphragm (21) is opposite to and spaced from the first magnet (31) and the second magnet (32), the voice coil (22) is fixed to the surface of the diaphragm (21) facing the first magnet (31), the voice coil (22) is spaced from the first magnet (31) and the second magnet (32), and the projection of the voice coil (22) in a first direction overlaps with a part of the first magnet (31) and / or a part of the second magnet (32), and the first direction is the thickness direction of the speaker (100); The first upper magnetic conductor (33) is fixed to the surface of the first magnet (31) facing the diaphragm (21), the first upper magnetic conductor (33) is spaced apart from the diaphragm (21) and the voice coil (22), and a portion of the first upper magnetic conductor (33) is located on the inner side of the voice coil (22).

2. The loudspeaker (100) according to claim 1, characterized in that The width of the first upper magnetic conductor (33) is a first width (H1), and the first width (H1) is greater than or equal to 0.5 mm.

3. The loudspeaker (100) according to claim 2, characterized in that: The inner width of the voice coil (22) is a second width (H2), and the second width (H2) is greater than or equal to 0.6 millimeters.

4. The loudspeaker (100) according to claim 3, characterized in that: A difference between the first width (H1) and the second width (H2) is greater than or equal to 0.1 mm.

5. The loudspeaker (100) according to any one of claims 1 to 4, characterized in that: The distance between the inner peripheral side wall and the outer peripheral side wall of the voice coil (22) is a third width (H3), and the third width (H3) is greater than the thickness of the voice coil (22).

6. The loudspeaker (100) according to any one of claims 1 to 5, characterized in that: The winding plane of the voice coil (22) is perpendicular to the first direction.

7. The loudspeaker (100) according to any one of claims 1 to 6, characterized in that: The loudspeaker (100) further comprises a second upper magnetic conductor (34), wherein the second upper magnetic conductor (34) is fixed to a surface of the second magnet (32) facing the diaphragm (21), and the second upper magnetic conductor (34) is located on a side of the voice coil (22) facing away from the first upper magnetic conductor (33).

8. The loudspeaker (100) according to claim 7, characterized in that: The distance between the second upper magnetic conductor (34) and the voice coil (22) is greater than or equal to 0.05 mm.

9. The loudspeaker (100) according to claim 7 or 8, characterized in that: The second upper magnetic conductor (34) has a notch (34a), and the voice coil (22) is electrically connected to a power source through the notch (34a).

10. The loudspeaker (100) according to claim 9, characterized in that The second upper magnetic conductor (34) is provided with a first avoidance step (342a), the opening of the first avoidance step (342a) is formed on the surface of the second upper magnetic conductor (34) facing the second magnet (32) and the outer peripheral side surface of the second upper magnetic conductor (34), and the first avoidance step (342a) is connected to the notch (34a); The loudspeaker (100) further comprises a circuit board (40), at least a portion of which is located within the first avoidance step (342a), the voice coil (22) is electrically connected to the circuit board (40) via the notch (34a), and the circuit board (40) is electrically connected to the power supply.

11. The loudspeaker (100) according to any one of claims 1 to 10, characterized in that: The loudspeaker (100) further comprises a lower magnetic conductor (35), wherein the lower magnetic conductor (35) is fixedly connected to a surface of the first magnet (31) facing away from the diaphragm (21), and / or a surface of the second magnet (32) facing away from the diaphragm (21).

12. The loudspeaker (100) according to any one of claims 1 to 11, characterized in that: The diaphragm (21) comprises a first vibrating part (21a) and a second vibrating part (21b), the second vibrating part (21b) is ring-shaped, the first vibrating part (21a) is located inside the second vibrating part (21b) and is fixedly connected to the second vibrating part (21b), and the voice coil (22) is fixedly connected to the surface of the first vibrating part (21a) facing the first magnet (31); The first vibration part (21a) comprises a first straight part (211) and a first folding ring part (212); the first straight part (211) is ring-shaped; the first folding ring part (212) is located inside the first straight part (211) and is fixedly connected to the first straight part (211); the first folding ring part (212) protrudes relative to the first straight part (211) in a direction away from the first magnet (31); the first straight part (211) is connected between the second vibration part (21b) and the first folding ring part (212); And / or, the second vibrating portion (21b) comprises a second straight portion (213) and a second folded ring portion (214), the second folded ring portion (214) being connected between the second straight portion (213) and the first vibrating portion (21a), and the second folded ring portion (214) protruding relative to the second straight portion (213) in a direction away from the first magnet (31).

13. The loudspeaker (100) according to any one of claims 1 to 11, characterized in that: The diaphragm (21) comprises a first vibration part (21a) and a second vibration part (21b), the second vibration part (21b) is ring-shaped, the first vibration part (21a) is located inside the second vibration part (21b) and is fixedly connected to the second vibration part (21b); The first vibration part (21a) comprises a first connection part (215), a first main body part (216), a second connection part (217) and a second main body part (218); the first connection part (215), the first main body part (216) and the second connection part (217) are all ring-shaped; the second main body part (218) is located on the inner side of the first connection part (215) and is fixedly connected to the first connection part (215); the second connection part (217) is located on the outer side of the first connection part (215); the first main body part (216) is connected between the first connection part (215) and the second connection part (217); and the second connection part (217) is fixedly connected to the second vibration part (21b); In the first direction, the distance from the first main body (216) to the first magnet (31) is smaller than the distance from the second main body (218) to the first magnet (31); the voice coil (22) is embedded in the first main body (216); the surface of the voice coil (22) facing the first magnet (31) is exposed relative to the first main body (216); the inner width of the first connecting portion (215) is a fourth width (H4); and the fourth width (H4) is greater than or equal to 0.6 mm.

14. The loudspeaker (100) according to any one of claims 1 to 13, characterized in that: The loudspeaker (100) further comprises a shell (10), the shell (10) comprising a top (11) and a frame (12), the frame (12) being fixedly connected to the outer periphery of the top (11), the voice coil (22), the diaphragm (21), the first magnet (31), the second magnet (32) and the first upper magnetic conductor (33) being all accommodated inside the shell (10), and the space between the diaphragm (21) and the top (11) constitutes a front cavity (100a) of the loudspeaker (100); The top (11) comprises a first part (113), a second part (114) and a transition part (115); the transition part (115) is connected between the first part (113) and the second part (114); in the first direction, the distance from the first part (113) to the diaphragm (21) is greater than the distance from the second part (114) to the diaphragm (21); the first part (113) is provided with a sound outlet (11a); the sound outlet (11a) connects the front cavity (100a) with the external space of the speaker (100).

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

Images