Speaker and electronic device

Abstract

Embodiments of the present application provide a loudspeaker and an electronic device, and relate to the technical field of audio playing. The loudspeaker comprises a magnetic piece, at least one magnetic conducting piece, a voice coil and a magnetic block. The at least one magnetic conducting piece is arranged to be spaced apart from the magnetic piece along a second direction to form at least one magnetic gap with the magnetic piece. At least part of the voice coil is arranged in one of the magnetic gaps. The magnetic block is arranged in one of the magnetic gaps and is configured to vibrate synchronously with the voice coil after current is passed through. The magnetic gap in which the magnetic block is arranged is a preset magnetic gap, and two sides of the preset magnetic gap are a first side and a second side. The first side is convex in a direction away from the magnetic piece, and / or the second side is concave in a direction away from the magnetic piece. While the magnetic block is arranged to improve the loudness of the loudspeaker, the foregoing structural design can also achieve the purpose of centering the magnetic block, improve the reliability of the structure in the loudspeaker, and improve the sound quality of the loudspeaker.

Description

Technical Field

[0001] This application relates to the field of audio playback technology, and more particularly to a speaker and electronic device. Background Technology

[0002] Speakers are essential components in electronic devices such as headphones, smart glasses, and mobile phones, used to convert received electrical signals into sound signals to enable audio playback. With the development of electronic technology, users' requirements for the performance of electronic devices are gradually increasing; for example, the requirements for the loudness and sensitivity of speakers in electronic devices are also gradually increasing.

[0003] As the performance requirements for loudspeakers gradually increase, and as loudspeaker sizes decrease, the internal structure of loudspeakers becomes increasingly sophisticated. This presents a significant challenge to the stability of the various components within the loudspeaker. For example, some components within the loudspeaker are magnetic or magnetically conductive. During use, or if the loudspeaker is subjected to impacts, poor stability between the various internal structures can easily lead to unexpected displacements of structures such as the voice coil, affecting the loudspeaker's reliability. Summary of the Invention

[0004] This application provides a loudspeaker and an electronic device, which aims to improve the loudness of the loudspeaker, enhance its structural reliability, and improve its sound quality.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, a loudspeaker is provided, the loudspeaker including a magnetic element, at least one magnetic conductor, a voice coil, and a magnetic block.

[0007] In this configuration, the two magnetic poles of the magnetic element are arranged along a first direction. At least one magnetically conductive element is spaced apart from the magnetic element along a second direction to form at least one magnetic gap with the magnetic element, the second direction being perpendicular to the first direction. At least a portion of the voice coil is disposed within one of the magnetic gaps. A magnetic block is disposed within one of the magnetic gaps; the magnetic block is configured to vibrate synchronously with the voice coil after an current is applied.

[0008] In one of the magnetic gaps, the magnetic gap with the magnetic block is a preset magnetic gap, and the two sides forming the preset magnetic gap are the first side and the second side. The first side is the side of the two sides that belongs to the magnetic component, and the second side is the side of the two sides that belongs to the magnetic conductor.

[0009] The first side protrudes away from the magnetic component; and / or the second side is recessed away from the magnetic component.

[0010] In the loudspeaker provided in this application embodiment, by setting a magnetic block connected to the voice coil, the magnetic block in the magnetic field is subjected to static magnetic force, thereby compensating for the force on the voice coil and improving the loudspeaker's loudness. Simultaneously, by setting a first side that protrudes away from the magnetic component and / or a second side that is recessed away from the magnetic component, centering is achieved, thereby improving the structural reliability and sound quality of the loudspeaker.

[0011] In one possible implementation of the first aspect, the second side is planar; the first side protrudes away from the magnetic component. Leakage magnetic flux is generated at the protruding position of the first side of the magnetic component, thereby increasing the magnetic flux density at the protruding position and facilitating the centering of the magnetic block.

[0012] In one possible implementation of the first aspect, the first side is an arc-shaped curved surface that bulges away from the magnetic component. The arc-shaped first side makes the change in magnetic flux density within the preset magnetic gap more uniform, which is beneficial to the stability of the speaker structure and to improving sound quality.

[0013] In one possible implementation of the first aspect, the first side includes multiple first stepped surfaces, with the height of the multiple first stepped surfaces gradually increasing along the direction from the ends where the two magnetic poles of the magnetic element are located to the middle of the magnetic element. This structural design can also make the change in magnetic flux density within the preset magnetic gap more uniform, which is beneficial to the stability of the speaker structure.

[0014] In one possible implementation of the first aspect, the magnetic component includes a first sub-part and a second sub-part; the second sub-part is disposed on the surface of the first sub-part near the second side; the dimension of the second sub-part in the first direction is smaller than the dimension of the first sub-part in the first direction. In this design, the second sub-part protrudes more significantly, therefore, in this case, there is more magnetic leakage at the location of the second sub-part, which can further increase the magnetic flux density at that location and further improve the centering effect on the magnetic block.

[0015] In one possible implementation of the first aspect, the first side is flat; the second side is recessed away from the magnetic component. The recessed area on the second side of the magnetic component can also generate magnetic leakage, increasing the magnetic flux density at the recessed location and facilitating the centering of the magnetic block.

[0016] In one possible implementation of the first aspect, the second side is an arc-shaped surface that is concave away from the magnetic component. Similarly, the arc-shaped surface of the second side also makes the change in magnetic flux density within the preset magnetic gap more uniform, which is beneficial to the stability of the speaker structure and to improving sound quality.

[0017] In one possible implementation of the first aspect, the second side includes multiple second stepped surfaces, with the height of these surfaces gradually increasing along a direction from the middle of the magnetic element to the ends where the two magnetic poles are located. This structural design also allows for a more uniform change in magnetic flux density within the preset magnetic gap, which is beneficial to the stability of the speaker structure.

[0018] In one possible implementation of the first aspect, a groove is formed on the second side, with the groove opening facing the magnetic component. Similarly, in this design, the recess of the groove on the second side is more obvious, so there is more magnetic leakage at the location of the groove, which can further increase the magnetic flux density at that location and further improve the centering effect on the magnetic block.

[0019] In one possible implementation of the first aspect, the magnetic component is symmetrically arranged with a reference plane perpendicular to the first direction as its symmetrical surface, and the second side is also symmetrically arranged with the reference plane as its symmetrical surface. This facilitates setting the centering position of the magnetic block at the center of the preset magnetic gap, making it easier to achieve symmetry in the positive and negative strokes of the voice coil and other vibrating structures such as the magnetic block.

[0020] In one possible implementation of the first aspect, the loudspeaker includes a magnetic conductor, with a magnetic gap formed between the magnetic conductor and the magnetic component. At least a portion of the voice coil and the magnetic block are disposed within the magnetic gap. That is, in the embodiments of this application, the voice coil and the magnetic block can share the magnetic gap, which is beneficial for reducing the design size of the loudspeaker and achieving miniaturization.

[0021] In one possible implementation of the first aspect, at least one magnetic conductor includes a first magnetic conductor and a second magnetic conductor, which are disposed on opposite sides of a magnetic conductor along a second direction, and a first magnetic gap is formed between the first magnetic conductor and the magnetic conductor, at least a portion of the voice coil is disposed in the first magnetic gap, and a preset magnetic gap is formed between the second magnetic conductor and the magnetic conductor.

[0022] The loudspeaker provided in this application embodiment has a dual magnetic gap, with the magnetic gaps of the voice coil and the magnetic block being independent of each other, thereby decoupling the magnetic fields of the two and facilitating flexible adjustment of the thrust on the voice coil or the magnetic block.

[0023] In one possible implementation of the first aspect, the magnetic element has a first end face and a second end face disposed opposite to each other, the first end face and the second end face being arranged along a first direction.

[0024] The loudspeaker further includes a third magnetic conductor and a fourth magnetic conductor. The third magnetic conductor is disposed on the first end face, and the side surface of the third magnetic conductor near the at least one magnetic conductor is spaced apart from the at least one magnetic conductor. The fourth magnetic conductor is disposed on the second end face, and the side surface of the fourth magnetic conductor near the at least one magnetic conductor is spaced apart from the at least one magnetic conductor.

[0025] By setting the end of the fourth magnetic conductor close to the magnetic conductor at a distance from the magnetic conductor, the magnetic field distribution at the first end face of the magnetic conductor can be made to be approximately the same as the magnetic field distribution at the second end face of the magnetic conductor. This makes the force on the magnetic block symmetrical in the positive and negative strokes, thereby improving the structural reliability and sound quality of the speaker.

[0026] In a second aspect, an electronic device is provided, comprising a housing and a speaker as provided in any embodiment of the first aspect. The speaker is disposed inside the housing.

[0027] The technical effects brought about by the electronic devices in the second aspect can be seen in the technical effects brought about by the design of the loudspeakers in the first aspect, and will not be repeated here. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0029] Figure 2 An exploded view of a loudspeaker structure provided in an embodiment of this application;

[0030] Figure 3 An exploded view of another structure of the loudspeaker provided in an embodiment of this application;

[0031] Figure 4 For along Figure 2 A cross-sectional view of the speaker in its assembled state, with section line A-A' in the figure;

[0032] Figure 5 For along Figure 3 A cross-sectional view of the speaker in its assembled state, with section line B-B' in the figure;

[0033] Figure 6 A magnetic field distribution diagram of a loudspeaker provided in an embodiment of this application;

[0034] Figure 7 for Figure 6 The corresponding displacement-magnetic flux density analysis diagram and displacement-negative stiffness analysis diagram;

[0035] Figure 8 Another magnetic field distribution diagram of the loudspeaker provided in the embodiments of this application;

[0036] Figure 9 for Figure 8 The corresponding displacement-magnetic flux density analysis diagram and displacement-negative stiffness analysis diagram;

[0037] Figures 10-18 A cross-sectional view of a loudspeaker provided in an embodiment of this application;

[0038] Figure 19Displacement-negative stiffness analysis diagram of the loudspeaker provided in the embodiments of this application;

[0039] Figure 20 Another cross-sectional view of the loudspeaker provided in an embodiment of this application;

[0040] Figures 21-23 This is a schematic diagram of the structure of a loudspeaker provided in an embodiment of this application. Detailed Implementation

[0041] The technical solutions in some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application are within the scope of protection of this application.

[0042] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "exemplary," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this application. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, a particular feature, structure, material, or characteristic may be included in any suitable manner in any one or more embodiments or examples.

[0044] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0045] In describing some embodiments, the term "connection" and its derivative expressions may be used. The term "connection" should be interpreted broadly; for example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0046] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0047] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0048] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0049] This document describes exemplary embodiments with reference to sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Therefore, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. Thus, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0050] Furthermore, the scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the emergence of new scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0051] This application provides an electronic device, which can be, for example, headphones, speakers, mobile phones, tablets, personal digital assistants (PDAs), televisions, smart wearable products (e.g., smartwatches, smart bracelets), virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, rechargeable small household appliances (e.g., soymilk makers, robot vacuum cleaners), drones, radar, aerospace equipment, in-vehicle equipment, vehicles, power systems, and other types of user devices or terminal devices capable of being configured with speakers to achieve audio playback functions. This application does not impose any special limitations on the specific form of the electronic device.

[0052] Figure 1 This is a schematic diagram of the structure of the electronic device 1000 provided in the embodiments of this application.

[0053] Understandable, Figure 1 The structure of electronic device 1000 is illustrated by taking it as an example of a headset, rather than limiting the type of electronic device 1000.

[0054] like Figure 1 As shown, the electronic device 1000 may include a speaker 100 and a housing 200, with the speaker 100 disposed within the housing 200.

[0055] The loudspeaker 100 is a device that converts electrical signals into sound signals. The loudspeaker 100 can also be called a horn or an amplifier.

[0056] For example, the speaker 100 can be a moving coil speaker.

[0057] The housing 200 serves as a protective structure to house the speaker 100 and protect it from external damage.

[0058] For example, see Figure 1 The housing 200 may have an opening, and the sound-emitting side of the speaker 100 (e.g., the side where the diaphragm is located) may face the opening of the housing so that the sound emitted by the speaker 100 can be transmitted to the outside of the housing 200.

[0059] For example, the electronic device 1000 may also include a larger... Figure 1 The additional structures shown may include, for example, a processor, or may include, for example, a processor. Figure 1 The headband, ear pads, and other structures shown are not limited in this application.

[0060] With the rapid development of electronic technology, the performance of the speaker 100 in the electronic device 1000, such as sound pressure level (SPL), sensitivity, and sound quality (which can be characterized by quality factor), also needs to be improved accordingly in order to meet the needs of users.

[0061] Sound pressure level is used to represent the magnitude of sound pressure or the intensity of sound (approximately equal to loudness), and its unit is decibel (dB).

[0062] In related technologies, a loudspeaker includes a vibration system and a magnetic circuit system. The vibration system includes a voice coil and a diaphragm located on one side of the voice coil and connected to it. The magnetic circuit system includes a magnet and a fixed iron piece, with a magnetic gap formed between the magnet and the fixed iron piece. The magnet generates a magnetic field within this magnetic gap, and the voice coil is disposed within the magnetic gap. When an electric current is passed through the voice coil, the energized voice coil generates a Lorentz force in the magnetic field. This Lorentz force drives the voice coil to move in a direction parallel to the voice coil axis, thereby causing the diaphragm to vibrate, which in turn drives the air to vibrate and produce sound.

[0063] In the loudspeaker provided by this related technology, the magnetic induction intensity of the magnetic field where the voice coil is located is relatively weak, which makes the Lorentz force on the voice coil smaller during movement, resulting in a smaller vibration amplitude of the diaphragm and affecting the sound pressure level (i.e. loudness) of the loudspeaker.

[0064] To address the aforementioned technical problems, this application also provides a loudspeaker 100.

[0065] Figure 2 This is an exploded view of the structure of a loudspeaker 100 provided in an embodiment of this application. Figure 3 This is an exploded view of another structure of the loudspeaker 100 provided in an embodiment of this application. Figure 4 For along Figure 2 The cross-sectional view of speaker 100 in its assembled state, with section line A-A'. Figure 5 For along Figure 3 The cross-sectional view of speaker 100 in its assembled state, with section line B-B'.

[0066] like Figures 2-5 As shown, the loudspeaker 100 includes a magnetic element 10, at least one magnetic conductor 20, a voice coil 30, and a magnetic block 40.

[0067] The magnetic component 10 is magnetic, for example, a permanent magnet, and the two magnetic poles (N pole and S pole) of the magnetic component 10 are arranged along the first direction X.

[0068] For example, the upward (with) of the magnetic element 10 Figure 2Taking the orientation of the magnetic element 10 as an example, the end facing upwards is the N pole, and the end facing downwards is the S pole. Inside the magnetic element 10, the magnetic field lines of the magnetic element 10 point from bottom to top (i.e., the S pole points to the N pole), and outside the magnetic element 10, the magnetic field lines of the magnetic element 10 point from top to bottom (i.e., the N pole points to the S pole). Alternatively, for example, the upward end of the magnetic element 10 can be the S pole, and the downward end can be the N pole; this application does not impose any limitations on this.

[0069] like Figure 2 and Figure 4 As shown, the loudspeaker 100 may include only one magnetic conductor 20.

[0070] Or, such as Figure 3 and Figure 5 As shown, the loudspeaker 100 may include two magnetic conductors 20, namely a first magnetic conductor 21 and a second magnetic conductor 22.

[0071] In this speaker 100, at least one magnetic conductor 20 is disposed on the side of the magnetic conductor 10 along a direction perpendicular to the first direction X.

[0072] For example, see Figure 2 When the speaker 100 includes a magnetic conductor 20 and the magnetic conductor 10 has a ring structure, the magnetic conductor 20 can be disposed inside the ring of the magnetic conductor 10, or the magnetic conductor 20 can be disposed outside the ring of the magnetic conductor 10.

[0073] Or, for example, see Figure 5 In the case where the loudspeaker 100 includes a first magnetic element 21 and a second magnetic element 22, the first magnetic element 21 and the second magnetic element 22 are respectively disposed on opposite sides of the magnetic element 10 along the second direction Y (perpendicular to the first direction X). For example, see... Figure 3 When the magnetic component 10 has a ring structure, the first magnetic conductive component 21 can be disposed inside the ring of the magnetic component 10, and the second magnetic conductive component 22 can be disposed outside the ring of the magnetic component 10. Alternatively, the second magnetic conductive component 22 can be disposed inside the ring of the magnetic component 10, and the first magnetic conductive component 21 can be disposed outside the ring of the magnetic component 10.

[0074] like Figure 4 and Figure 5 As shown, the aforementioned magnetic conductive element 20 is spaced apart from the magnetic element 10 along the second direction Y (perpendicular to the first direction X) to form at least one magnetic gap H. At least a portion of the voice coil 30 is disposed within the at least one magnetic gap H, and the magnetic block 40 is disposed within one of the at least one magnetic gap H. The magnetic gap in the at least one magnetic gap H used to accommodate the magnetic block 40 is a preset magnetic gap H'.

[0075] For example, see Figure 4When the loudspeaker 100 includes a magnetic conductor 20, the magnetic conductor 20 and the magnetic conductor 10 form a magnetic gap H, at least a portion of the voice coil 30 and the magnetic block 40 are disposed within the magnetic gap H, which is the preset magnetic gap H'.

[0076] Or, see Figure 5 When the loudspeaker 100 includes a first magnetic conductor 21 and a second magnetic conductor 22, the magnetic conductor 20 and the magnetic element 10 form two magnetic gaps H. The first magnetic conductor 21 and the magnetic element 10 form a first magnetic gap H1, and the second magnetic conductor 22 and the magnetic element 10 form a second magnetic gap H2. At least a portion of the voice coil 30 is disposed within the first magnetic gap H1, and the magnetic block 40 is disposed within the second magnetic gap H2. In this case, the second magnetic gap H2 is the preset magnetic gap H'.

[0077] It is understandable that the magnetic field lines emitted by the magnetic component 10 and located within the magnetic gap H are approximately perpendicular to the first direction X. That is, a magnetic field perpendicular to the first direction X is formed in the magnetic gap H. When the voice coil 30 is disposed in the magnetic gap H, the magnetic field in the magnetic gap H can cause the voice coil 30, which carries a current, to be subjected to Lorentz force and move along the first direction X, thereby driving the diaphragm and other sound-producing structures to produce sound. When the magnetic block 40 is disposed in the magnetic gap H, the magnetic field in the magnetic gap H can cause the magnetic block 40 disposed in the magnetic gap H to be subjected to a static magnetic force parallel to the first direction X, thereby achieving force compensation for the voice coil 30.

[0078] For example, the magnetic conductor 20 is magnetic or magnetically conductive, thereby facilitating the formation of a magnetic field between the magnetic conductor 20 and the magnetic conductor 10 (especially within the magnetic gap H).

[0079] For example, the material of the magnetic conductor 20 may include neodymium iron boron, iron, low carbon steel, iron-aluminum or nickel-iron, etc.

[0080] For example, when the magnetic conductor 20 is magnetic, the direction of the magnetic field lines inside the magnetic conductor 20 is the same as the direction of the magnetic field lines of the magnetic component 10 at the location of the magnetic conductor 20.

[0081] For example, the magnetization direction of the magnetic conductor 20 is opposite to that of the magnetic component 10, so that the direction of the magnetic field lines of the magnetic component 10 at the location of the magnetic conductor 20 is the same as the direction of the magnetic field lines inside the magnetic conductor 20.

[0082] By making the magnetic conductor 20 part magnetic, the magnetic field strength between the magnetic component 10 and the magnetic conductor 20 can be enhanced, that is, the magnetic field strength in the magnetic gap H can be enhanced, thereby increasing the Lorentz force on the voice coil 30 when it is in the magnetic gap H, and increasing the static magnetic force on the magnetic block 40 when it is in the magnetic gap H (i.e., the preset magnetic gap H'), thereby facilitating the increase of the amplitude of the loudspeaker 100 (e.g., the amplitude of the diaphragm), thereby increasing the loudness (or sound pressure level) of the loudspeaker 100.

[0083] See Figure 4 and Figure 5 At least a portion of the voice coil 30 is disposed within the magnetic gap H. That is, at least a portion of the voice coil 30 is in a magnetic field in which the magnetic field lines are perpendicular to the first direction X.

[0084] For example, see Figure 2 The voice coil 30 can be a coil made of wire, such as enameled wire wound on a frame (e.g., frame 70).

[0085] For example, the voice coil 30 has a sheet-like annular structure and is lightweight so that it can achieve high-frequency vibration, thereby driving the vibration of structures such as diaphragms, and thus driving the air to produce sound.

[0086] Understandably, see Figure 4 and Figure 5 The axis Li of the voice coil 30 is the same as the first direction X. A magnetic field perpendicular to the axis Li of the voice coil 30 is transmitted in the aforementioned magnetic gap H. According to the left-hand rule, this magnetic field can cause the voice coil 30 to be subjected to Lorentz force when current is transmitted in the voice coil 30, and the direction of the force is parallel to the extension direction of the axis Li of the voice coil 30. The Lorentz force drives the voice coil 30 to cut the magnetic field lines in the magnetic gap H, that is, it drives the voice coil 30 to move along the extension direction of its axis Li (i.e. the first direction X).

[0087] Understandably, the voice coil 30 is configured to transmit alternating current in order to enable the voice coil 30 to reciprocate in the magnetic gap H.

[0088] See Figure 4 and Figure 5 The magnetic block 40 is disposed within the magnetic gap H (i.e., the preset magnetic gap H'). That is, the magnetic block 40 is in a magnetic field in which the direction of the magnetic field lines is perpendicular to the first direction X.

[0089] For example, the magnetic block 40 may be magnetic or magnetically conductive. For instance, the magnetic block 40 may be a permanent magnet or soft iron, or the material of the magnetic block 40 may include neodymium iron boron, iron, low carbon steel, iron-aluminum or nickel-iron, etc.

[0090] It is understandable that the aforementioned "magnetic permeability" refers to the ability or property of having magnetic permeability under the influence of a magnetic field.

[0091] When the magnetic block 40, which is magnetic or permeable to magnetism, is placed in the magnetic field of the magnetic gap H, it will generate a magnetic field with a direction opposite to that of the magnetic component 10. At this time, the magnetic block 40 is subjected to a static magnetic force under the action of its own magnetic field and the magnetic field of the magnetic component 10. Figure 4 and Figure 5 (Taking the orientation in the middle as an example) When moving, the magnetic block 40 will be subjected to an upward static magnetic force, and when the magnetic block 40 moves downward, the magnetic block 40 will be subjected to a downward static magnetic force.

[0092] The magnet 40 is configured to vibrate synchronously with the voice coil 30 after an electric current is applied.

[0093] For example, the magnetic block 40 can be connected to the voice coil 30, so that when the voice coil 30 moves, the magnetic block 40 moves synchronously within the magnetic gap H.

[0094] It should be noted that the term "synchronous vibration" here only describes the mutual influence and follow-up characteristics of the voice coil 30 and the magnetic block 40, rather than restricting them to performing strictly synchronized movements at any given time. For example, during the initial current flow, the voice coil 30 is displaced under the combined action of the magnetic field generated by the current and the magnetic field generated by the magnetic component 10 (i.e., under the action of Lorentz force), which in turn causes the magnetic block 40 connected to the voice coil 30 to displace as well. The passively displaced magnetic block 40 is subjected to static magnetic force under the combined action of its own magnetic field and the magnetic field of the magnetic component 10, resulting in additional displacement. This further causes the voice coil 30 connected to the magnetic block 40 to displace, thus compensating for the force on the voice coil 30. Therefore, the aforementioned "synchronous vibration" can be understood as the two moving in tandem.

[0095] In related technologies, the vibration system model of the loudspeaker without the magnet 40 is as follows:

[0096]

[0097] Where F0(N) is the electromagnetic force introduced by energizing the first voice coil, s(N / m) is the stiffness introduced by the elastic system (including air stiffness and mechanical stiffness of structures such as the voice coil and diaphragm), m(kg) is the equivalent vibrating mass, t(s) is time, r(N×s / m) is frictional damping, and ω is the angular frequency of vibration.

[0098] The solution for the speaker's amplitude can be derived from this vibration system model:

[0099]

[0100] The first term is the steady-state term, and the second term is the transient term that decays over time. The resonant angular frequency when there is no frictional resistance; Indicates damping; This represents static displacement.

[0101] Therefore, it can be concluded that during low-frequency vibration, i.e., when ω << ω0, the amplitude... At this point, the amplitude x is mainly controlled by the applied electromagnetic force F0 and the stiffness s.

[0102] As can be seen from the above formula, in order to increase the loudness of the loudspeaker (i.e., increase the amplitude), it is necessary to increase the thrust F0 (i.e., electromagnetic force) or decrease the stiffness s.

[0103] In order to increase the thrust F, it is necessary to strengthen the magnetic field or increase the current. Strengthening the magnetic field requires increasing the volume of the magnet in the speaker, which increases the cost, while increasing the current will also lead to an increase in the overall power consumption of the speaker.

[0104] In the loudspeaker 100 provided in this application embodiment, by providing a magnetic block 40 connected to the voice coil 30, the magnetic block 40 in the magnetic field is subjected to a static magnetic force, thereby introducing a static magnetic force F into the loudspeaker 100. mag =s mag ×x, to compensate for the force on the voice coil 30, where s mag For negative stiffness, negative stiffness s mag The larger the value, the greater the introduced static magnetic force F. mag The larger the value, the greater the compensation for the force on the voice coil 30.

[0105] In the embodiments provided in this application, the vibration system model of the loudspeaker 100 becomes:

[0106]

[0107]

[0108] Based on this vibration system model, the solution for the amplitude of loudspeaker 100 can be derived as follows:

[0109]

[0110] Therefore, in the embodiments provided in this application, when the vibration is at low frequency, i.e., when ω << ω0, the amplitude is... At this point, the amplitude x is mainly determined by the applied electromagnetic force F0, stiffness s, and negative stiffness s. mag Control is achieved by introducing a negative stiffness s, while keeping the electromagnetic force F0 constant (i.e., the magnetic field strength and the input current in the voice coil remain constant to avoid increasing cost or power consumption) and the stiffness s constant (i.e., the air stiffness and the mechanical stiffness of the structure remain constant). mag Or increase the negative stiffness s mag This can effectively increase the amplitude x of the speaker 100, thereby enhancing the loudness of the speaker 100.

[0111] That is, the embodiments provided in this application can enhance the amplitude of the speaker 100 without increasing the magnetic field of the speaker 100, thereby avoiding increased cost, and without increasing the input current in the voice coil 30, thereby avoiding increased power consumption.

[0112] Furthermore, in related technologies, as the loudspeaker is used for an extended period, the structure within the loudspeaker used to achieve centering (keeping the voice coil in an ideal position when unenergized, for example, at the initial position of the magnetic gap H) gradually loses its centering function. For example, the surround in the loudspeaker (see [reference]) may lose its centering function. Figure 4 The folded ring 62) is used to keep the voice coil, which is not energized, at the initial position of the magnetic gap, thereby ensuring that the voice coil vibrates within a reasonable range of travel during movement. However, the folded ring will experience modulus decay as the usage time increases, or under fatigue conditions such as long-term stress or long-term heat, which will lead to a significant reduction in the reliability of the speaker 100 structure and sound quality.

[0113] To address this technical problem, the speaker 100 provided in this application embodiment is further designed as follows:

[0114] like Figure 4 and Figure 5 As shown, the two sides forming the preset magnetic gap H' are the first side 10A and the second side 20A. The first side 10A is the side of the two sides forming the preset magnetic gap H' that belongs to the magnetic element 10, and the second side 20A is the side of the two sides forming the preset magnetic gap H' that belongs to the magnetic conductor 20.

[0115] For example, see Figure 5 When the speaker 100 includes a second magnetic conductor 22, and the preset magnetic gap H' is the second magnetic gap H2 formed between the second magnetic conductor 22 and the magnetic member 10, the side of the magnetic member 10 facing the second magnetic conductor 22 is the first side 10A, and the side of the second magnetic conductor 22 facing the magnetic member 10 is the second side 20A.

[0116] Among them, as will be in the following Figures 10-12 As shown, the side of the magnetic element 10 forming the preset magnetic gap H' (i.e., the first side 10A) protrudes in a direction away from the magnetic element 10 (i.e., in a direction toward the preset magnetic gap H').

[0117] Or, as in the following Figures 13-15 As shown, the side of the magnetic conductor 20 that forms the preset magnetic gap H' (i.e., the second side 20A) is recessed in the direction away from the magnetic conductor 10 (i.e., in the direction away from the preset magnetic gap H').

[0118] Or, as in the following Figures 16-18As shown, the side of the magnetic element 10 that forms the preset magnetic gap H' (i.e., the first side 10A) protrudes in the direction away from the magnetic element 10, while the side of the magnetic element 20 that forms the preset magnetic gap H' (i.e., the second side 20A) is recessed in the direction away from the magnetic element 10.

[0119] It is understood that the trajectory of the magnetic block 40 within the preset magnetic gap H' is parallel to the center line extending along the first direction X of the magnetic block 40. Through the aforementioned arrangement, during the movement of the magnetic block 40 (e.g., when moving from the upper end to the lower end of the preset magnetic gap H'), the distance between the magnetic block 40 and the magnetic element 10 changes from large to small and then back to large, and / or the distance between the magnetic block 40 and the magnetically conductive element 20 (e.g., the second magnetically conductive element 22) forming the preset magnetic gap H' changes from small to large and then back to small. This allows the magnitude and direction of the static magnetic force experienced by the magnetic block 40 during its movement to change. For details of the change process, see [link to relevant documentation]. Figure 6 , Figure 7 , Figure 8 , Figure 9 And as described below.

[0120] Figure 6 The diagram illustrates the force change process of the magnetic block 40 when the first side 10A protrudes away from the magnetic component 10. Figure 7 for Figure 6 The analysis diagrams of displacement-static magnetic force and displacement-negative stiffness corresponding to the structure are shown in the figure.

[0121] Figure 8 The diagram shows the force change process of the magnetic block 40 when the second side 20A is recessed away from the magnetic component 10. Figure 9 for Figure 8 The analysis diagrams of displacement-static magnetic force and displacement-negative stiffness corresponding to the structure are shown in the figure.

[0122] like Figure 6 (a) Figure 8 As shown in (a), when the magnetic block 40 is at the center of the preset magnetic gap H' (i.e. Figure 7 and Figure 9 When the displacement is 0 mm, the magnetic block 40 is subjected to two opposing and approximately equal attraction forces from the upper and lower parts of the magnetic component 10. These two opposing and approximately equal attraction forces cancel each other out at this position, so that the total static magnetic force on the magnetic block 40 at the displacement of 0 mm is 0.

[0123] like Figure 6 As shown in (b), when the first side surface 10A of the magnetic component 10 protrudes towards the preset magnetic gap H', the area near the highest point of the protrusion of the first side surface 10A (corresponding to the area near the center of the preset magnetic gap H', for example...) Figure 7Magnetic leakage occurs within the displacement range of -10mm to 0mm and 0mm to 10mm, or as... Figure 8 As shown in (b), when the second side 20A of the magnetic conductor 20 is recessed in a direction away from the preset magnetic gap H', the area near the lowest point of the recess on the second side 20A (near the center of the preset magnetic gap H', for example) Figure 9 Magnetic leakage also occurs within the displacement range of -10mm to 0mm and 0mm to 10mm. The magnetic flux density is higher at the two aforementioned locations, which will increase the magnetic field strength at those locations.

[0124] like Figure 6 (c) Figure 8 As shown in (c), at the end of the magnetic block 40 located in the preset magnetic gap H' (e.g., Figure 7 and Figure 9 In the case of a displacement of -15mm or 15mm, due to the two ends of the magnetic element 10 (within) Figure 4 Taking the upper and lower ends of the magnetic component 10 as an example (especially under the action of the third magnetic conductor 23 and the fourth magnetic conductor 24), the magnetism is strongest, making the upper and lower ends of the preset magnetic gap H' (taking the upper and lower ends of the magnetic component 10 as an example) the magnetism is strongest. Figure 4 The magnetic flux density is highest in the direction of (taking the direction of the center as an example).

[0125] Therefore, during the movement of the magnetic block 40, the magnetic flux density experienced by the magnetic block 40 changes from a large value to a small value and then back to a large value, pointing from the center of the preset magnetic gap ' to the end of the preset magnetic gap H' (see reference). Figure 7 and Figure 9 The process of moving the magnetic block 40 from 0mm to 15mm in the middle of the stroke changes the direction of the static magnetic force from negative to positive (where positive means from bottom to top and negative means from top to bottom). That is, at the center position near the preset magnetic gap H', the direction of the static magnetic force on the magnetic block 40 is opposite to the direction of the stroke, while at the end position near the preset magnetic gap H', the direction of the static magnetic force on the magnetic block 40 is the same as the direction of the stroke.

[0126] For example, see Figure 7 and Figure 9 When the displacement is from 0mm to 10mm (positive stroke), the magnetic flux density of the magnetic field at the location of the magnetic block 40 decreases. At this time, the direction of the static magnetic force on the magnetic block 40 (i.e., the slope of the magnetic flux density curve) is negative (see...). Figure 6 (b) and Figure 8 (b) (pointing from top to bottom), and when the displacement is 10mm to 15mm, the magnetic flux density of the magnetic field where the magnetic block 40 is located increases from small to large. At this time, the direction of the static magnetic force on the magnetic block 40 (i.e., the slope of the magnetic flux density curve) is positive (see [reference]). Figure 6 (c) and Figure 8(c) in the middle, pointing from top to bottom.

[0127] In summary, and referring to Figure 7 and Figure 9 In the loudspeaker 100 provided in this application embodiment, within the displacement range of -8mm to 8mm, the negative stiffness introduced by the magnet 40 becomes a positive value. The direction of the static magnetic force on the magnet 40 at this position is opposite to the stroke (for example, the direction of the static magnetic force is positive in the negative stroke). That is, a static magnetic force opposite to the stroke direction of the voice coil 30 is provided near the center position of the preset magnetic gap H', thereby reducing the tendency of the voice coil 30 to move up and down at this position. This makes it easier to keep the voice coil 30 and the magnet 40 in the ideal initial position (i.e., at a displacement of 0mm when not energized), achieve centering, thereby improving the structural reliability of the loudspeaker 100 (ensuring that when the voice coil 30 is subjected to force, the vibrating structure such as the voice coil 30 reciprocates along the axial direction Li of the voice coil 30) and improving the sound quality (for example, avoiding nonlinear distortion).

[0128] To achieve the centering of the aforementioned magnetic block 40, this application provides the following implementation method:

[0129] Figures 10-18 This is a schematic diagram of the structure of the loudspeaker 100 provided in an embodiment of this application. It can be understood that... Figures 10-18 The cross-sectional views shown in the following figures can be cross-sectional views of the overall structure of the loudspeaker 100, or only cross-sectional views of a portion of the loudspeaker 100, for example, Figures 10-18 The cross-sectional view shown in the subsequent figures can also be formed by rotating the axis of rotation, as shown below. Figure 2 or Figure 3 The structure shown is the assembled structure.

[0130] In some embodiments, such as Figures 10-12 The second side 20A is a plane and parallel to the first direction X, while the first side 10A protrudes in a direction away from the magnetic component 10. That is, during the movement of the magnetic block 40, the distance between the magnetic block 40 and the second side 20A remains unchanged, while only the distance between the magnetic block 40 and the first side 10A changes from large to small and then back to large.

[0131] For example, see Figure 10 The first side surface 10A is an arc-shaped curved surface that protrudes in a direction away from the magnetic component 10.

[0132] Or, for example, see Figure 11 The first side surface 10A includes multiple first stepped surfaces U1 along the first direction X, pointing from the ends where the two magnetic poles of the magnetic element 10 are located to the middle of the magnetic element 10, and the step heights corresponding to the multiple first stepped surfaces U1 gradually increase. That is, the first side surface 10A has a raised serrated shape.

[0133] Or, for example, see Figure 12 The magnetic component 10 includes a first sub-part 11 and a second sub-part 12; the side of the first sub-part 11 near the second side 20A is parallel to the first direction X, and the second sub-part 12 is disposed on the side of the first sub-part 11 near the second side 2A.

[0134] The second sub-part 12 is smaller in size in the first direction X than the first sub-part 11 in the first direction X. For example, the second sub-part 12 is located at the center of the side of the first sub-part 11 near the second side surface 2A.

[0135] In some embodiments, such as Figures 13-15 The first side surface 10A is a plane and parallel to the first direction X, while the second side surface 20A is recessed in a direction away from the magnetic component 10. That is, during the movement of the magnetic block 40, the distance between the magnetic block 40 and the first side surface 10A remains unchanged, while only the distance between the magnetic block 40 and the second side surface 20A changes from small to large and then back to small.

[0136] For example, see Figure 13 The second side 20A is an arc-shaped surface that is recessed in the direction away from the magnetic component.

[0137] Or, for example, see Figure 14 The second side surface 20A includes a plurality of second stepped surfaces U2. Along the first direction X, and in two directions from the middle of the magnetic element 10 to the ends where the two magnetic poles of the magnetic element 10 are located, the step heights corresponding to the plurality of second stepped surfaces U2 gradually increase. That is, the second side surface 20A is concave and serrated.

[0138] Or, for example, see Figure 15 At least one magnetic conductive element 20 has a groove V on its second side 20A, with the groove V facing the magnetic element 10.

[0139] In some embodiments, such as Figures 16-18 The first side 10A protrudes in the direction away from the magnetic component 10, and the second side 20A is recessed in the direction away from the magnetic component 10.

[0140] That is, during the movement of the magnetic block 40, the distance between the magnetic block 40 and the first side 10A changes from large to small and then back to large, while at the same time, the distance between the magnetic block 40 and the second side 20A changes from small to large and then back to small.

[0141] It is understood that in this embodiment, the shape variations of the first side surface 10A and the second side surface 20A can be arbitrarily combined, for example, see [reference]. Figure 16 The first side surface 10A can be a convex curved surface, and the second side surface 20A can be a concave curved surface, or for example, see [reference needed]. Figure 17 The magnetic component 10 includes a first sub-part 11 and a second sub-part 12 (i.e., the first side surface 10A has a protrusion), and the second side surface 20A can be a recessed curved surface, or, for example, see [reference needed]. Figure 18 The first side surface 10A can be a raised curved surface, and the second side surface 20A of the magnetic conductor 20 (e.g., the second magnetic conductor 22) is provided with a groove V. Alternatively, it can be other combinations and variations, which will not be elaborated here.

[0142] It is understood that the speaker 100 provided in this application embodiment has a symmetrical structure, for example, see [reference]. Figure 4 and Figure 5 The magnetic component 10 is symmetrically arranged with reference plane N perpendicular to the first direction X as the symmetrical plane, and the second side surface 20A is also symmetrically arranged with reference plane N as the symmetrical plane. This makes the magnetic field distribution of the upper and lower parts of the magnetic gap H symmetrical, so that the magnitude of the static magnetic force on the magnetic block 40 when it is moving upward or downward is relatively consistent. This helps to keep the magnetic block 40 in the middle position of the preset magnetic gap H', that is, it helps to achieve the centering function of the magnetic block 40 and reduces the probability of structural failure and other problems of the speaker 100.

[0143] In addition to the structures described in the foregoing embodiments, the loudspeaker 100 may also include, but is not limited to, the following structures:

[0144] In some embodiments, such as Figures 10-18 As shown, the loudspeaker 100 may also include a third magnetic element 23 and a fourth magnetic element 24.

[0145] See Figures 10-18 The magnetic component 10 also has a first end face 11C and a second end face 11D that are disposed opposite to each other, the first end face 11C and the second end face 11D being arranged along a first direction X, that is, both being perpendicular to the first direction X.

[0146] See Figures 10-18 The third magnetic conductor 23 is disposed on the first end face 11C.

[0147] For example, the third magnetic conductor 23 can be a fastener, such as a metal washer.

[0148] See Figures 10-18 The surface of the third magnetic conductor 23, near the magnetic conductor 20, is spaced apart from the magnetic conductor 20, allowing the voice coil 30 to move smoothly within the magnetic gap H. Furthermore, by providing the third magnetic conductor 23 on the first end face 11C of the magnetic component 10, a complete magnetic circuit can be formed between the magnetic component 10, the third magnetic conductor 23, and the magnetic conductor 20. The third magnetic conductor 23 can concentrate the magnetic dipoles of the magnetic component 10 into the magnetic gap H through the magnetic circuit, thereby significantly enhancing the strength of the magnetic field in the magnetic gap H.

[0149] See Figures 10-18 The fourth magnetic conductor 24 is disposed on the second end face 11D.

[0150] For example, see Figure 10 The fourth magnetic conductor 24 can be integrally formed with the magnetic conductor 20 (e.g., forming a U-shaped iron or a T-shaped iron), thereby simplifying the fabrication process of the structure in the loudspeaker 100 and reducing the fabrication difficulty of the loudspeaker 100.

[0151] Similar to the third magnetic conductive element 23, by providing a fourth magnetic conductive element 24 on the second end face 11D of the magnetic element 10, a complete magnetic circuit can be formed between the magnetic element 10, the third magnetic conductive element 23, the magnetic conductive element 20 and the fourth magnetic conductive element 24. Furthermore, the fourth magnetic conductive element 24 can also concentrate the magnetic dipole of the magnetic element 10 into the magnetic gap H through the magnetic circuit, thereby greatly enhancing the strength of the magnetic field in the magnetic gap H.

[0152] In some embodiments, such as Figure 4 and Figure 5 As shown, the speaker 100 may also include a frame 5.

[0153] For example, see Figure 4 and Figure 5 The frame 5 has a concave receiving cavity Q, and the aforementioned structure of the speaker 100 is disposed in the receiving cavity Q.

[0154] For example, the material of the basin frame 5 may include materials with high rigidity such as carbon steel and aluminum alloy.

[0155] For example, see Figure 4 and Figure 5 The frame 5 can be conical and surround the outside of the sound-generating structure composed of the aforementioned magnetic component 10, magnetic conductor 20, voice coil 30 and magnetic block 40, so as to improve the sound uniformity of the loudspeaker 100.

[0156] In some embodiments, such as Figure 4 and Figure 5 As shown, the loudspeaker 100 may also include a diaphragm 61. The diaphragm 61 is used to connect with the voice coil 30 so that it vibrates and produces sound under the drive of the voice coil 30.

[0157] Among them, see Figure 4 and Figure 5 The diaphragm 61 extends in a direction that intersects the first direction X. For example, the diaphragm 61 may be perpendicular to the first direction X, or the diaphragm 61 may be angled relative to the first direction X.

[0158] See Figure 4 and Figure 5The diaphragm 61 is disposed on one side of the magnetic component 10 and spaced apart from the magnetic component 10. The gap between the diaphragm 61 and the magnetic component 10 provides space for the vibration of the diaphragm 61.

[0159] For example, see Figure 4 and Figure 5 The aforementioned magnetic components 10 and other structures are disposed inside the basin frame 5, and the diaphragm 61 can be disposed at the opening of the aforementioned basin frame 5 and connected to the inner wall of the receiving cavity Q.

[0160] For example, the material of the diaphragm 61 may include paper, plastic, metal or fiber, or the material of the diaphragm 61 may include one or more of silicone, rubber, liquid crystal polymer or polyimide, etc., and the embodiments of this application do not limit this.

[0161] In some embodiments, see Figure 4 and Figure 5 The loudspeaker 100 may also include a suspension 62, also known as a surround. For example... Figure 4 and Figure 5 As shown, the suspension edge 62 is nested around the periphery of the diaphragm 61. The inner side of the suspension edge 62 is as follows: Figure 6 The diaphragm 61 is bonded to the periphery of the diaphragm 61, and the outer side of the suspension edge 62 is bonded to the frame 5, so that the diaphragm 61 can be connected to the frame 5 through the suspension edge 62.

[0162] For example, the suspension edge 62 is made of an elastic material, such as rubber. The suspension edge 62 is relatively soft compared to the diaphragm 61, so that a flexible connection between the diaphragm 61 and the frame 5 can be achieved through the suspension edge 62, so as to increase the amplitude of the diaphragm 61 and thus increase the loudness of the speaker 100.

[0163] In some embodiments, see Figure 4 and Figure 5 The speaker 100 may also include a frame 70.

[0164] See Figure 4 and Figure 5 The voice coil 30 is disposed on the frame 70. For example, the frame 70 is cylindrical, and the voice coil 30 is wound around the outer surface of the cylindrical frame 70 to fix the position of the voice coil 30 so that at least a portion of the voice coil 30 can move within the range of the magnetic gap H.

[0165] See Figure 4 and Figure 5 The magnetic block 40 is also set on the frame 70, for example, see Figure 4 The magnet 40 and the coulomb 30 are set together on the same frame 70, or refer to Figure 5The loudspeaker 100 includes two frames 70, with a voice coil 30 and a magnet 40 respectively disposed on the two frames 70 to fix the position of the magnet 40, so that the magnet 40 can move within the range of a preset magnetic gap H'.

[0166] For example, when the loudspeaker 100 includes two frames 70, and the voice coil 30 and the magnet 40 are respectively disposed on the two frames 70, the two frames 70 are connected so that the voice coil 30 and the magnet 40 are connected to achieve synchronous vibration between them.

[0167] In this case, at least one of the two frames 70 is connected to the diaphragm 61, so that the diaphragm 61 can vibrate and produce sound through the movement of the voice coil 30.

[0168] For example, the material of the skeleton 70 may include aluminum, glass fiber, or other rigid materials.

[0169] In some embodiments, such as Figure 4 and Figure 5 As shown, the speaker 100 may also include a spider 8.

[0170] For example, the wave 8 can be in the form of a ring structure (see...). Figure 2 and Figure 3 See also Figure 4 and Figure 5 After the elastic wave 8 is cut, the cross-section of the elastic wave 8 shows an uneven corrugated structure. The more corrugated structures, the shallower the depth of the corrugations, and the thinner the material constituting the elastic wave 8, the greater the elasticity of the elastic wave 8.

[0171] For example, the material of the elastic wave 8 may include cotton cloth, polyester fiber cloth, blended fabric, and other materials with good tensile strength, not easy to crack, and good fatigue resistance.

[0172] For example, the spring wave 8 is disposed in the receiving cavity Q of the basin frame 5, one end of the spring wave 8 is connected to the inner wall of the receiving cavity Q, and the other end is connected to the frame 70.

[0173] The spider 8, connected to the frame 70, can provide a restoring force perpendicular to the first direction X for the voice coil 30. During the movement of the voice coil 30 and the magnet 40, or during the use of the speaker 100, the voice coil 30 and / or the magnet 40 may deform in the direction perpendicular to the first direction X, affecting the normal vibration of the voice coil 30 and thus affecting the sound quality. By setting the spider 8, the position of the voice coil 30 and the magnet 40 that have shifted in the direction perpendicular to the first direction X can be corrected.

[0174] For example, the spring wave 8 may also include other connection methods that enable the voice coil 30 to be positioned perpendicular to the first direction X. This application embodiment is only illustrated by connecting the spring wave 8 to the frame 5 and the skeleton 70 respectively, and does not limit its specific setting position and connection method.

[0175] To enhance the centering effect of the magnet 40 in the aforementioned loudspeaker 100, this application also provides the following implementation method:

[0176] In some embodiments, such as Figure 11 , Figure 18 As shown, the surface of the fourth magnetic conductor 24 near the magnetic conductor 20 is spaced apart from the magnetic conductor 20.

[0177] Figure 19 The analysis curves include the displacement-negative stiffness of the speaker 100 when the fourth magnetic conductor 24 and the magnetic conductor 20 are spaced apart: the displacement-negative stiffness analysis curve of the speaker 100 when the first side 10A is a convex curved surface, and the displacement-negative stiffness analysis curve of the speaker 100 when the second side 20A is a concave curved surface.

[0178] It is understandable that the magnetic block 40 is at the position from the end above the preset magnetic gap H' to the center of the preset magnetic gap H' during the positive stroke. Figure 19 The static magnetic force experienced by the magnetic block 40 during the displacement range of 0mm to 15mm is related to the negative stroke (i.e., from the end below the preset magnetic gap H' to the center position of the preset magnetic gap H', that is... Figure 19 When the static magnetic force experienced by the magnetic block 40 is different within the displacement range of -15mm to 0mm, that is, when the positive and negative strokes of the magnetic block 40 are asymmetrical, the magnetic block 40 will gradually shift towards the stroke with a larger static magnetic force during reciprocating motion. For example, if the static magnetic force experienced in the positive stroke is larger, the magnetic block 40 will shift upward, which is not conducive to the centering of the magnetic block 40. At the same time, the asymmetrical negative stiffness of the stroke will cause nonlinearity of the speaker 100, affecting the structural reliability of the speaker 100 and causing sound quality distortion.

[0179] By setting the end of the fourth magnetic conductor 24 near the magnetic conductor 20 at a distance from the magnetic conductor 20, the magnetic induction intensity distribution experienced by the magnetic block 40 in the preset magnetic gap H' can be made symmetrical about the positive and negative strokes. For example, the magnetic field line distribution density of the two is approximately the same, thereby allowing the voice coil 30 and the magnetic block 40 to move upwards (within the direction of travel). Figure 18 Taking the direction of movement as an example, the thrust (including Lorentz force and static magnetic force) experienced by the magnetic block 40 during its movement is approximately equal to the thrust experienced during its downward movement. That is, the force on the magnetic block 40 is symmetrical in the positive and negative strokes, thereby improving the structural reliability and sound quality of the speaker 100.

[0180] In some embodiments, such as Figure 20 As shown, the loudspeaker 100 may also include a second voice coil 32.

[0181] The second voice coil 32 is fixedly connected to the voice coil 30. For example, see [reference needed]. Figure 20 Both can be wound on the same frame 70, thereby realizing the follow-up movement between the voice coil 30 and the second voice coil 32. It is understood that other design methods that can realize the fixed connection between the second voice coil 32 and the voice coil 30, thereby realizing the follow-up movement of both, are within the protection scope of this application, and this application does not limit them.

[0182] For example, the second voice coil 32 can also be electrically connected to the voice coil 30 (not shown in the figure). For example, the voice coil 30 and the second voice coil 32 can be wound with the same wire at different locations (e.g., at both ends of the frame 70). Or, for example, the voice coil 30 and the second voice coil 32 can be electrically connected by another wire or other conductive structure, or connected to the same power source at the same time, which is not limited in this application.

[0183] For example, the second voice coil 32 is configured to transmit a current in the opposite direction to the current transmitted by the voice coil 30.

[0184] For example, when voice coil 30 and voice coil 32 are wound from the same wire, the winding directions of voice coil 30 and voice coil 32 are opposite. Or, for example, at the same time, the direction of the current transmitted in voice coil 30 is opposite to the direction of the current transmitted in voice coil 32.

[0185] Among them, see Figure 20 The voice coil 30, the magnet 40, and the second voice coil 32 can be located within the same magnetic gap H, and the voice coil 30 and the second voice coil 32 can be disposed on opposite sides of the magnet 40. For example, the voice coil 30 and the second voice coil 32 can be symmetrically arranged with the magnet 40 as the symmetrical point.

[0186] For example, see Figure 20 At least a portion of the voice coil 30 is disposed between the third magnetic conductor 23 and the magnetic conductor 20, and at least a portion of the second voice coil 32 is disposed between the fourth magnetic conductor 24 and the magnetic conductor 20. That is, the voice coil 30 is approximately located in the upper half of the magnetic gap H (within the upper half of the magnetic gap H). Figure 20 Taking the position in the middle as an example, the second voice coil 32 moves roughly in the lower half of the magnetic gap H.

[0187] By setting voice coils 30 and second voice coils 32 on both sides of the magnetic block 40, the magnetic field distribution of the magnetic block 40 is the same in both the positive and negative strokes, that is, the symmetry of the positive and negative strokes of the magnetic block 40 is achieved, which facilitates the centering of the magnetic block 40.

[0188] Figures 21-23This is a schematic diagram of the structure of the loudspeaker 100 provided in an embodiment of this application.

[0189] In some embodiments, the structures in the aforementioned speaker 100 may be circular, square, elliptical, racetrack-shaped, or ring-shaped as described in the aforementioned figures. For example, see [reference needed]. Figure 21 and Figure 22 The magnetic conductor 20, magnetic component 10, and other structures in the speaker 100 can all be annular, or for example, see [reference needed]. Figure 23 The magnetic conductor 20, magnetic component 10 and other structures in the loudspeaker 100 can all be rectangular, and this application does not impose any restrictions on this.

[0190] In some embodiments, such as Figure 21 and Figure 22 As shown, the loudspeaker 100 can be an external magnetic structure or an internal magnetic structure, and this application does not limit it.

[0191] For example, see Figure 21 The speaker 100 has an external magnetic structure, with the magnetic component 10 arranged around the magnetic conductor 20.

[0192] Or, for example, see Figure 22 The speaker 100 has an internal magnetic structure, with the magnetic conductor 20 arranged around the magnetic component 10.

[0193] It should be noted that the "magnetic field lines" mentioned in the embodiments of this application are not physical objects, but are only used to illustrate and explain the distribution of the magnetic field.

[0194] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A loudspeaker, characterized in that, include: A magnetic component, wherein the two magnetic poles of the magnetic component are arranged along a first direction; At least one magnetic conductive element is disposed at a distance from the magnetic element along a second direction to form at least one magnetic gap with the magnetic element; the second direction is perpendicular to the first direction; The voice coil is at least partially disposed within one of the magnetic gaps; A magnetic block is disposed in one of the magnetic gaps; the magnetic block is configured to vibrate synchronously with the voice coil after an electric current is applied. Wherein, in the at least one magnetic gap, the magnetic gap with the magnetic block is a preset magnetic gap, and the two sides forming the preset magnetic gap are a first side and a second side. The first side is the side of the two sides that belongs to the magnetic component, and the second side is the side of the two sides that belongs to the magnetic conductor. Wherein, the first side protrudes in a direction away from the magnetic element to generate magnetic leakage; and / or, the second side is recessed in a direction away from the magnetic element to generate magnetic leakage.

2. The loudspeaker according to claim 1, characterized in that, The second side is a plane, and the first side protrudes in a direction away from the magnetic element.

3. The loudspeaker according to claim 2, characterized in that, The first side is an arc-shaped curved surface that bulges away from the magnetic component.

4. The loudspeaker according to claim 2, characterized in that, The first side surface includes a plurality of first stepped surfaces, and the height of the plurality of first stepped surfaces gradually increases along the direction from the ends where the two magnetic poles of the magnetic element are located to the middle of the magnetic element.

5. The loudspeaker according to claim 2, characterized in that, The magnetic component includes a first sub-part and a second sub-part; the second sub-part is disposed on the surface of the first sub-part near the second side; the dimension of the second sub-part in the first direction is smaller than the dimension of the first sub-part in the first direction.

6. The loudspeaker according to claim 1, characterized in that, The first side is flat, and the second side is recessed in a direction away from the magnetic element.

7. The loudspeaker according to claim 6, characterized in that, The second side is an arc-shaped surface that is recessed in the direction away from the magnetic component.

8. The loudspeaker according to claim 6, characterized in that, The second side includes a plurality of second stepped surfaces, and the height of the plurality of second stepped surfaces gradually increases along the direction from the middle of the magnetic element to the ends where the two magnetic poles of the magnetic element are located.

9. The loudspeaker according to claim 6, characterized in that, A groove is provided on the second side, with the opening of the groove facing the magnetic component.

10. The loudspeaker according to any one of claims 1 to 9, characterized in that, The magnetic component is symmetrically arranged with a reference plane perpendicular to the first direction as the symmetrical surface, and the second side is symmetrically arranged with the reference plane as the symmetrical surface.

11. The loudspeaker according to any one of claims 1 to 9, characterized in that, The loudspeaker includes a magnetic conductor, and a magnetic gap is formed between the magnetic conductor and the magnetic element. At least a portion of the voice coil and the magnetic block are disposed within the magnetic gap.

12. The loudspeaker according to any one of claims 1 to 9, characterized in that, The at least one magnetic conductive element includes a first magnetic conductive element and a second magnetic conductive element. The first magnetic conductive element and the second magnetic conductive element are disposed on opposite sides of the magnetic element along the second direction, and a first magnetic gap is formed between the first magnetic conductive element and the magnetic element. At least a portion of the voice coil is disposed in the first magnetic gap, and the second magnetic conductive element and the magnetic element are formed by a predetermined magnetic gap.

13. The loudspeaker according to any one of claims 1 to 9, characterized in that, The magnetic component has a first end face and a second end face disposed opposite to each other, and the first end face and the second end face are arranged along the first direction; The speaker also includes: A third magnetic conductive element is disposed on the first end face, and the side surface of the third magnetic conductive element that is close to the at least one magnetic conductive element is spaced apart from the at least one magnetic conductive element. A fourth magnetic conductive element is disposed on the second end face, and the side surface of the fourth magnetic conductive element that is close to the at least one magnetic conductive element is spaced apart from the at least one magnetic conductive element.

14. An electronic device, characterized in that, include: case; The loudspeaker as claimed in any one of claims 1 to 13, wherein the loudspeaker is disposed inside the housing.

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