Loudspeaker and electronic equipment

Abstract

The embodiment of the invention provides a loudspeaker and electronic equipment, and relates 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 conductive member and the magnetic member are arranged at an interval along the second direction so as to form at least one magnetic gap with the magnetic member. At least part of the voice coil is arranged in one magnetic gap. The magnetic block is arranged in one magnetic gap; and the magnetic block is configured to synchronously vibrate with the voice coil after being electrified. The magnetic gap provided with the magnetic block in the at least one magnetic gap is a preset magnetic gap, and two side surfaces forming the preset magnetic gap are a first side surface and a second side surface. The first side face protrudes in the direction away from the magnetic piece. And / or the second side surface is recessed towards the direction far away from the magnetic piece. According to the loudspeaker, the loudness of the loudspeaker is improved by arranging the magnetic block, meanwhile, the aim of centering the magnetic block can be achieved through the structural design, the reliability of the structure in the loudspeaker is improved, and the tone quality of the loudspeaker is improved.

Description

Technical Field

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

[0002] Speakers are essential components in electronic devices such as headphones, smart glasses, and mobile phones. They are used to convert received electrical signals into sound signals to play audio. With the development of electronic technology, users have gradually increased their requirements for the performance of electronic devices, for example, the requirements for the loudness and sensitivity of speakers in electronic devices have gradually increased.

[0003] As the requirements for various speaker performances gradually increase and the size of speakers gradually decreases, the internal structure of speakers becomes more and more refined, which poses a greater challenge to the stability of various structures in speakers. For example, some parts in speakers are magnetic or permeable. During the use of the speaker or when the speaker is bumped, if the stability between various structures in the speaker is poor, it is easy to cause unexpected displacement of structures such as the voice coil, affecting the reliability of the speaker. Summary of the invention

[0004] The embodiments of the present application provide a speaker and an electronic device, the purpose of which is to increase the loudness of the speaker while enhancing the structural reliability of the speaker and improving the sound quality of the speaker.

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

[0006] In a first aspect, a speaker is provided. The speaker includes a magnetic component, at least one magnetic conductive component, a voice coil, and a magnetic block.

[0007] The two magnetic poles of the magnetic component are arranged along a first direction. At least one magnetic conductive component is arranged in a second direction and spaced apart from the magnetic component to form at least one magnetic gap with the magnetic component, and the second direction is perpendicular to the first direction. At least part of the voice coil is arranged in a magnetic gap. The magnetic block is arranged in a magnetic gap; the magnetic block is configured to vibrate synchronously with the voice coil after current is passed through it.

[0008] Among them, in at least one magnetic gap, the magnetic gap with a magnetic block is a preset magnetic gap, and the two side surfaces forming the preset magnetic gap are a first side surface and a second side surface, the first side surface is the side surface of the two side surfaces belonging to the magnetic part, and the second side surface is the side surface of the two side surfaces belonging to the magnetic conductive part.

[0009] Wherein, the first side surface is convex in a direction away from the magnetic component; and / or the second side surface is concave in a direction away from the magnetic component.

[0010] In the speaker provided in the embodiment of the present application, by providing a magnetic block connected to the voice coil, the magnetic block in the magnetic field is subjected to a static magnetic force, thereby achieving compensation for the force on the voice coil and improving the loudness of the speaker. At the same time, by providing a first side surface that is convex in a direction away from the magnetic component; and / or a second side surface that is concave in a direction away from the magnetic component, centering is achieved, thereby improving the structural reliability and sound quality of the speaker.

[0011] In a possible implementation of the first aspect, the second side surface is a plane, and the first side surface protrudes in a direction away from the magnetic member. A leakage magnetic field is formed at the protruding position of the first side surface of the magnetic member, thereby increasing the magnetic flux density at the protruding position, thereby facilitating the centering of the magnetic block.

[0012] In a possible implementation of the first aspect, the first side surface is an arc-shaped surface convex in a direction away from the magnetic member. The first side surface is an arc-shaped surface, so that the change of the magnetic flux density in the preset magnetic gap is more uniform, which is beneficial to the stability of the speaker structure and to improving the sound quality.

[0013] In a possible implementation of the first aspect, the first side surface includes a plurality of first step surfaces, and the heights of the plurality of first step surfaces gradually increase along a direction from the ends where the two magnetic poles of the magnetic member are located to the middle of the magnetic member. This structural design can also make the change of the magnetic flux density in the preset magnetic gap more uniform, which is beneficial to the stability of the speaker structure.

[0014] In a possible implementation of the first aspect, the magnetic member includes a first sub-section and a second sub-section; the second sub-section is disposed on a surface of the first sub-section close to the second side surface; and the size of the second sub-section in the first direction is smaller than the size of the first sub-section in the first direction. In this design, the second sub-section protrudes more obviously, so in this case, there is more leakage magnetic flux at the position where the second sub-section is located, which can further increase the magnetic flux density at this position and further improve the centering effect on the magnetic block.

[0015] In a possible implementation of the first aspect, the first side surface is a plane, and the second side surface is concave in a direction away from the magnetic member. The concave position of the second side surface of the magnetic conductive member can also form leakage magnetic flux, thereby increasing the magnetic flux density at the concave position, and also facilitating the centering of the magnetic block.

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

[0017] In a possible implementation of the first aspect, the second side surface includes a plurality of second step surfaces, and the heights of the plurality of second step surfaces gradually increase along the direction from the middle of the magnetic member to the ends of the magnetic member where the two magnetic poles are located. This structural design can also make the change of the magnetic flux density in the preset magnetic gap more uniform, which is beneficial to the stability of the speaker structure.

[0018] In a possible implementation of the first aspect, a groove is provided on the second side surface, and the notch of the groove faces the magnetic member. Similarly, in this design, the depression of the groove on the second side surface is more obvious, so in this case, the leakage magnetic flux at the position where the groove is located is more, which can also further increase the magnetic flux density at this position, and further improve the centering effect on the magnetic block.

[0019] In a possible implementation of the first aspect, the magnetic member is symmetrically arranged with a reference plane perpendicular to the first direction as a symmetric plane, and the second side surface is symmetrically arranged with the reference plane as a symmetric plane. This is conducive to setting the centering position of the magnetic block at the center of the preset magnetic gap, and facilitating the symmetry of the positive and negative strokes of the vibration structure such as the voice coil and the magnetic block.

[0020] In a possible implementation of the first aspect, the speaker includes a magnetic conductive member, a magnetic gap is formed between the magnetic conductive member and the magnetic member, and at least a portion of the voice coil and the magnetic block are disposed in the magnetic gap. That is, the voice coil and the magnetic block in the embodiment of the present application can share the magnetic gap, which is conducive to reducing the design size of the speaker and realizing a miniaturized design.

[0021] In a possible implementation of the first aspect, at least one magnetic conductive part includes a first magnetic conductive part and a second magnetic conductive part, and the first magnetic conductive part and the second magnetic conductive part are arranged on two opposite sides of the magnetic part along the second direction, and the first magnetic conductive part and the magnetic part are spaced apart to form a first magnetic gap, at least part of the voice coil is arranged in the first magnetic gap, and the second magnetic conductive part and the magnetic part are spaced apart to form a preset magnetic gap.

[0022] That is, the speaker provided in the embodiment of the present application has a double magnetic gap, and the magnetic gaps where the voice coil and the magnetic block are located are independent of each other, thereby achieving decoupling of the magnetic fields where the two are located, thereby facilitating flexible adjustment of the thrust exerted on the voice coil or the magnetic block.

[0023] In a possible implementation manner of the first aspect, the magnetic member has a first end surface and a second end surface that are arranged opposite to each other, and the first end surface and the second end surface are arranged along a first direction.

[0024] The speaker further comprises a third magnetic conductive member and a fourth magnetic conductive member. The third magnetic conductive member is arranged on the first end surface, and a side surface of the third magnetic conductive member close to at least one magnetic conductive member is spaced apart from the at least one magnetic conductive member. The fourth magnetic conductive member is arranged on the second end surface, and a side surface of the fourth magnetic conductive member close to at least one magnetic conductive member is spaced apart from the at least one magnetic conductive member.

[0025] By arranging the end of the fourth magnetic conductive component close to the magnetic conductive component and spaced apart from the magnetic conductive component, the magnetic field distribution at the first end face of the magnetic component can be made substantially the same as the magnetic field distribution at the second end face of the magnetic component, thereby making the force on the magnetic block symmetrical in the positive stroke and the negative stroke, thereby improving the structural reliability and sound quality of the speaker.

[0026] In a second aspect, an electronic device is provided, the electronic device comprising a housing and a speaker provided by any one of the embodiments in the first aspect. The speaker is arranged inside the housing.

[0027] The technical effects brought about by the electronic device in the second aspect can refer to the technical effects brought about by the design of the speaker in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0029] Figure 2 An exploded diagram of the structure of a loudspeaker provided in an embodiment of the present application;

[0030] Figure 3 Another structural exploded diagram of the speaker provided in the embodiment of the present application;

[0031] Figure 4 For along Figure 2 A cross-sectional view of the loudspeaker in the assembled state along the section line AA';

[0032] Figure 5 For along Figure 3 A cross-sectional view of the loudspeaker in an assembled state along the section line BB';

[0033] Figure 6 A magnetic field distribution diagram of a speaker provided in an embodiment of the present application;

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

[0035] Figure 8 Another magnetic field distribution diagram of the speaker provided in the embodiment of the present application;

[0036] Fig. 9 for Figure 8 Corresponding displacement-magnetic flux density analysis diagram and displacement-negative stiffness analysis diagram;

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

[0038] Fig.19A displacement-negative stiffness analysis diagram of a loudspeaker provided in an embodiment of the present application;

[0039] Fig. 20 Another cross-sectional view of the loudspeaker provided in an embodiment of the present application;

[0040] Figure 21 to Figure 23 A schematic diagram of the structure of the speaker provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments provided by the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present application.

[0042] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] Unless the context requires otherwise, throughout the specification and claims, the term "including" is interpreted as an open, inclusive meaning, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "exemplarily" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present application. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0044] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0045] When describing some embodiments, the expression "connection" and its derivatives may be used. The term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The embodiments disclosed herein are not necessarily limited to the contents 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” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination 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 situations described and situations similar to the situations described, and the range of the similar situations is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors 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, wherein the acceptable deviation range of approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality may be, for example, the difference between the two equalities is less than or equal to 5% of either one.

[0049] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include deviations in shape due to, for example, manufacturing. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shapes of regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0050] In addition, the scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that, with the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0051] The embodiment of the present application provides an electronic device, which may be, for example, headphones, speakers, mobile phones, tablet computers, personal digital assistants (PDAs), televisions, smart wearable products (e.g., smart watches, smart bracelets), virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, rechargeable small household appliances (e.g., soybean milk machines, sweeping robots), drones, radars, aerospace equipment, vehicle-mounted equipment, vehicles, power systems, and other different types of user devices or terminal devices that can be configured with speakers to realize audio playback functions. The embodiment of the present application does not impose any special restrictions on the specific form of the electronic device.

[0052] Figure 1 A schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application.

[0053] Understandably, Figure 1 The structure of the electronic device 1000 is only exemplarily described by taking the electronic device 1000 as a headset as an example, rather than limiting the type of the electronic device 1000.

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

[0055] The speaker 100 is a device that converts an electrical signal into an acoustic signal. The speaker 100 may also be called a horn or a loudspeaker.

[0056] Exemplarily, the speaker 100 may be a dynamic speaker.

[0057] The housing 200 serves as a protective structure for accommodating the speaker 100 and protecting the speaker 100 from external damage.

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

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

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

[0061] Among them, sound pressure level is used to indicate the size of sound pressure or the strength of sound (roughly equal to loudness), and the unit is decibel (dB).

[0062] In the related art, a loudspeaker includes a vibration system and a magnetic circuit system, wherein the vibration system includes a voice coil and a diaphragm located on one side of the voice coil and connected to the voice coil, and the magnetic circuit system includes a magnet and a fixed iron, wherein the magnet and the fixed iron are spaced to form a magnetic gap, wherein the magnet forms a magnetic field in the magnetic gap, and the voice coil is arranged in the magnetic gap. When current is passed through the voice coil, the energized voice coil generates a Lorentz magnetic force in the magnetic field, and the Lorentz magnetic force drives the voice coil to move in a direction parallel to the axis of the voice coil, thereby driving the vibration of the diaphragm, and then driving the air to vibrate to produce sound.

[0063] In the speaker provided by the related technology, the magnetic induction intensity of the magnetic field in which the voice coil is located is relatively weak, so that the voice coil is subjected to a relatively small Lorentz magnetic force during movement, resulting in a relatively small vibration amplitude of the diaphragm, which affects the sound pressure level (i.e. loudness) of the speaker.

[0064] In order to solve the above technical problems, the present application also provides a speaker 100.

[0065] Figure 2 This is a structural exploded diagram of the speaker 100 provided in an embodiment of the present application. Figure 3 Another structural exploded diagram of the speaker 100 provided in the embodiment of the present application is shown in FIG. Figure 4 For along Figure 2 A cross-sectional view of the loudspeaker 100 in an assembled state, taken along the section line AA' in FIG. Figure 5 For along Figure 3 sectional view of the loudspeaker 100 in the assembled state, taken along the section line BB' in FIG.

[0066] like Figure 2 to Figure 5 As shown, the loudspeaker 100 includes a magnetic member 10 , at least one magnetic conductive member 20 , a voice coil 30 and a magnetic block 40 .

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

[0068] For example, the magnetic member 10 is directed upward (in Figure 2For example, the end of the magnetic part 10 pointing upward is the N pole, and the end pointing downward is the S pole. Inside the magnetic part 10, the magnetic flux lines of the magnetic part 10 point from the bottom to the top (i.e., the S pole points to the N pole), and outside the magnetic part 10, the magnetic flux lines of the magnetic part 10 point from the top to the bottom (i.e., the N pole points to the S pole). Or, for example, the end of the magnetic part 10 pointing upward can be the S pole, and the end pointing downward can be the N pole, and this application does not limit this.

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

[0070] Or, if Figure 3 and Figure 5 As shown, the speaker 100 may include two magnetic conductive members 20 , namely a first magnetic conductive member 21 and a second magnetic conductive member 22 .

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

[0072] For example, see Figure 2 When the speaker 100 includes a magnetic conductive member 20 and the magnetic member 10 is a ring-shaped structure, the magnetic conductive member 20 can be arranged on the inner side of the ring of the magnetic member 10, or the magnetic conductive member 20 can also be arranged on the outer side of the ring of the magnetic member 10.

[0073] Or, for example, see Figure 5 In the case where the speaker 100 includes the first magnetic conductive member 21 and the second magnetic conductive member 22, the first magnetic conductive member 21 and the second magnetic conductive member 22 are disposed on opposite sides of the magnetic member 10 along the second direction Y (perpendicular to the first direction X). Figure 3 In the case where the magnetic component 10 is a ring-shaped structure, the first magnetic conductive component 21 can be arranged on the inner side of the ring of the magnetic component 10, and the second magnetic conductive component 22 can be arranged on the outer side of the ring of the magnetic component 10; or, the second magnetic conductive component 22 can be arranged on the inner side of the ring of the magnetic component 10, and the first magnetic conductive component 21 can be arranged on the outer side of the ring of the magnetic component 10.

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

[0075] For example, see Figure 4In the case where the speaker 100 includes a magnetic conductive member 20, the magnetic conductive member 20 and the magnetic member 10 form a magnetic gap H, and at least part of the voice coil 30 and the magnetic block 40 are disposed in the magnetic gap H, which is the preset magnetic gap H'.

[0076] Alternatively, see Figure 5 In the case where the speaker 100 includes the first magnetic conductive member 21 and the second magnetic conductive member 22, the magnetic conductive member 20 and the magnetic member 10 form two magnetic gaps H, wherein the first magnetic conductive member 21 and the magnetic member 10 form a first magnetic gap H1, and the second magnetic conductive member 22 and the magnetic member 10 form a second magnetic gap H2. At least part of the voice coil 30 is disposed in the first magnetic gap H1, and the magnetic block 40 is disposed in the second magnetic gap H2. At this time, the second magnetic gap H2 is the preset magnetic gap H'.

[0077] It can be understood that the magnetic flux lines emitted by the magnetic member 10 and located in the magnetic gap H are substantially 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 arranged in the magnetic gap H, the magnetic field in the magnetic gap H can cause the voice coil 30 to be subjected to the Lorentz magnetic force and move along the first direction X, thereby driving the diaphragm and other sound-generating structures to emit sound. When the magnetic block 40 is arranged in the magnetic gap H, the magnetic field in the magnetic gap H can cause the magnetic block 40 arranged in the magnetic gap H to be subjected to the static magnetic force parallel to the first direction X, thereby realizing force compensation for the voice coil 30.

[0078] Exemplarily, the magnetic conductive member 20 is magnetic or has magnetic conductivity, so as to facilitate the formation of a magnetic field between the magnetic conductive member 20 and the magnetic member 10 (especially in the magnetic gap H).

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

[0080] Exemplarily, when the magnetic conductive member 20 is magnetic, the direction of the magnetic flux lines inside the magnetic conductive member 20 is the same as the direction of the magnetic flux lines of the magnetic member 10 at the position of the magnetic conductive member 20 .

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

[0082] By setting the magnetic conductive member 20 partially magnetic, the magnetic field strength between the magnetic member 10 and the magnetic conductive member 20 can be enhanced, that is, the magnetic field strength in the magnetic gap H can be enhanced, thereby increasing the Lorentz magnetic force to which the voice coil 30 is subjected when it is in the magnetic gap H, and increasing the static magnetic force to which the magnetic block 40 is subjected when it is in the magnetic gap H (that is, the preset magnetic gap H'), thereby facilitating increasing the amplitude of the speaker 100 (for example, the amplitude of the diaphragm), thereby increasing the loudness (or sound pressure level) of the speaker 100.

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

[0084] For example, see Figure 2 The voice coil 30 may be a coil wound by a conducting wire, for example, an enameled wire wound on a frame (eg, frame 70).

[0085] Exemplarily, the voice coil 30 is a sheet-like annular structure with a relatively light mass so as to be able to achieve high-frequency vibration, thereby driving structures such as a diaphragm to vibrate, thereby 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, and the magnetic gap H transmits a magnetic field perpendicular to the axis Li of the voice coil 30. According to the left-hand rule, the magnetic field can cause the voice coil 30 to be subjected to the Lorentz magnetic force when current is transmitted in the voice coil 30, and the force direction is parallel to the extension direction of the axis Li of the voice coil 30. The Lorentz magnetic force drives the voice coil 30 to cut the magnetic flux lines in the magnetic gap H, that is, drives the voice coil 30 to move along the extension direction of its axis Li (that is, the first direction X).

[0087] It is understood that the voice coil 30 is configured to transmit alternating current so as to achieve the reciprocating motion of the voice coil 30 in the magnetic gap H.

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

[0089] Exemplarily, the magnetic block 40 may be magnetic or magnetically permeable. For example, 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.

[0090] It can be understood that the aforementioned “magnetic conductivity” refers to the ability or property of magnetic conductivity under the action of a magnetic field.

[0091] When the magnetic or permeable magnetic block 40 is in the magnetic field of the magnetic gap H, it will form a magnetic field with a direction opposite to that of the magnetic field of the magnetic member 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 member 10. Figure 4 and Figure 5 When the magnetic block 40 moves upward (taking the direction in the middle as an example), 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 magnetic block 40 is configured to vibrate synchronously with the voice coil 30 after current is supplied thereto.

[0093] For example, the magnetic block 40 may be connected to the voice coil 30 , so that when the voice coil 30 moves, the magnetic block 40 is driven to move synchronously in the magnetic gap H.

[0094] It should be noted that the "synchronous vibration" here is only to illustrate the characteristics of the voice coil 30 and the magnetic block 40 that influence and follow each other, and does not limit the two to perform completely synchronous movement in a strict sense at any time. For example, when the current is just passed, the voice coil 30 is displaced under the joint action of the magnetic field generated by the current and the magnetic field generated by the magnetic part 10 (i.e., under the action of the Lorentz magnetic force), thereby driving the magnetic block 40 connected to the voice coil 30 to displace, and the magnetic block 40 that is passively displaced is subjected to the static magnetic force under the joint action of its own magnetic field and the magnetic field of the magnetic part 10, resulting in additional displacement, thereby driving the voice coil 30 connected to the magnetic block 40 to further displace, that is, compensating for the force on the voice coil 30. Therefore, it can be seen that the aforementioned "synchronous vibration" can be understood as the two following each other.

[0095] In the related art, when the magnetic block 40 is not provided, the vibration system model of the speaker is as follows:

[0096]

[0097] Among them, F0 (N) is the electromagnetic force introduced by 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 voice coil and diaphragm), m (kg) is the equivalent vibrating mass, t (s) is time, r (N×s / m) is friction damping, and ω is the vibration angular frequency.

[0098] Through this vibration system model, it can be deduced that the solution of the speaker amplitude is:

[0099]

[0100] Among them, the first term is a steady-state term, and the second term is a transient term that decays with time. is the resonant angular frequency when there is no friction resistance; represents damping; Represents static displacement.

[0101] From this we can see that when the frequency is low, that is, ω<<ω0, the amplitude At this time, the amplitude x is mainly controlled by the applied electromagnetic force F0 and the stiffness s.

[0102] It can be seen from the above formula that in order to increase the loudness of the speaker (ie, increase the amplitude), the thrust F0 (ie, the electromagnetic force) needs to be increased, or the stiffness s needs to be reduced.

[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, and increasing the current will also lead to an increase in the overall power consumption of the speaker.

[0104] In the speaker 100 provided in the embodiment of the present application, a magnetic block 40 connected to the voice coil 30 is provided so that the magnetic block 40 in the magnetic field is subjected to a static magnetic force, thereby introducing a static magnetic force F into the speaker 100. mag =s mag ×x, to achieve compensation for the force on the voice coil 30, where s mag is the negative stiffness, negative stiffness s mag The larger the magnetostatic force F mag The larger the value, the greater the compensation for the force on the voice coil 30.

[0105] In the embodiment provided by the present application, the vibration system model of the speaker 100 becomes:

[0106]

[0107]

[0108] It can be deduced from the vibration system model that the solution of the amplitude of the loudspeaker 100 becomes:

[0109]

[0110] It can be seen that in the embodiment provided in this application, when the low frequency vibration occurs, that is, when ω<<ω0, the amplitude At this time, the amplitude x is mainly determined by the applied electromagnetic force F0, stiffness s and negative stiffness s mag Control, when the electromagnetic force F0 remains unchanged (i.e. the magnetic field strength and the current input in the voice coil remain unchanged to avoid increasing the cost or power consumption) and the stiffness s remains unchanged (i.e. the air stiffness and the mechanical stiffness of the structure remain unchanged), by introducing negative stiffness s mag , or increase the negative stiffness s mag , the amplitude x of the speaker 100 can be effectively increased, thereby enhancing the loudness of the speaker 100.

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

[0112] In addition, in the related art, as the speaker is used for a longer time, the structure in the speaker for achieving centering (keeping the voice coil in an ideal position when not powered, for example, at the initial position of the magnetic gap H) gradually loses its centering function. For example, the surround in the speaker (see Figure 4 The folded ring 62 in the figure is used to keep the voice coil without current flowing in the initial position of the magnetic gap, so as to ensure that the voice coil vibrates within a reasonable range of travel during movement. However, the modulus of the folded ring will decay with the increase of usage time or under fatigue conditions such as long-term stress or long-term heat, which will greatly reduce the reliability of the structure and sound quality of the speaker 100.

[0113] To solve this technical problem, the speaker 100 provided in the embodiment of the present application is also designed as follows:

[0114] like Figure 4 and Figure 5 As shown, the two side surfaces forming the preset magnetic gap H' are the first side surface 10A and the second side surface 20A, wherein the first side surface 10A is the side surface belonging to the magnetic component 10 among the two side surfaces forming the preset magnetic gap H', and the second side surface 20A is the side surface belonging to the magnetic conductive component 20 among the two side surfaces forming the preset magnetic gap H'.

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

[0116] Among them, as follows Figure 10 to Figure 12 As shown, the side surface of the magnetic member 10 forming the preset magnetic gap H' (ie, the first side surface 10A) is convex in a direction away from the magnetic member 10 (ie, in a direction toward the preset magnetic gap H').

[0117] Or, as follows Figure 13 to Figure 15 As shown, the side surface of the magnetic conductive member 20 forming the preset magnetic gap H′ (ie, the second side surface 20A) is recessed in a direction away from the magnetic member 10 (ie, in a direction away from the preset magnetic gap H′).

[0118] Or, as follows Figure 16 to Figure 18As shown, the side surface of the magnetic member 10 forming the preset magnetic gap H' (i.e., the first side surface 10A) is convex in the direction away from the magnetic member 10, and at the same time, the side surface of the magnetic conductive member 20 forming the preset magnetic gap H' (i.e., the second side surface 20A) is concave in the direction away from the magnetic member 10.

[0119] It can be understood that the movement trajectory of the magnetic block 40 in the preset magnetic gap H' is parallel to the center line of the magnetic block 40 extending along the first direction X. Through the above-mentioned arrangement, the distance between the magnetic block 40 and the magnetic member 10 can be changed from large to small and then to large during the movement of the magnetic block 40 (for example, when moving from the upper end to the lower end of the preset magnetic gap H'), and / or the distance between the magnetic block 40 and the magnetic conductive member 20 (for example, the second magnetic conductive member 22) forming the preset magnetic gap H' changes from small to large and then to small, so that the magnitude and direction of the static magnetic force on the magnetic block 40 during the movement can be changed. For the specific change process, see Figure 6 , Figure 7 , Figure 8 , Fig. 9 and as described below.

[0120] Figure 6 FIG. 1 is a diagram showing a force variation process of the magnetic block 40 when the first side surface 10A is convex in a direction away from the magnetic member 10 . Figure 7 for Figure 6 The displacement-magnetostatic force analysis diagram and displacement-negative stiffness analysis diagram corresponding to the structure in.

[0121] Figure 8 FIG. 2 is a diagram showing a force variation process of the magnetic block 40 when the second side surface 20A is recessed in a direction away from the magnetic member 10 . Fig. 9 for Figure 8 The displacement-magnetostatic force analysis diagram and displacement-negative stiffness analysis diagram corresponding to the structure in.

[0122] like Figure 6 (a) Figure 8 As shown in (a), when the magnetic block 40 is at the center position of the preset magnetic gap H' (ie Figure 7 and Fig. 9 In the case of a displacement of 0 mm), the magnetic block 40 is subjected to suction forces of opposite directions and approximately the same magnitude from the upper and lower parts of the magnetic component 10. The two suction forces of opposite directions and approximately the same magnitude 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 member 10 is protruding toward the preset magnetic gap H', the first side surface 10A is near the highest protrusion position (corresponding to the center position of the preset magnetic gap H', for example Figure 7The displacement in the range of -10mm~0mm and 0mm~10mm) causes leakage magnetic flux, or Figure 8 As shown in (b), when the second side surface 20A of the magnetic conductive member 20 is recessed in a direction away from the preset magnetic gap H', the second side surface 20A is recessed at the lowest position (corresponding to the center position of the preset magnetic gap H', for example Fig. 9 The magnetic flux density at the two leakage positions is relatively high, which will increase the magnetic field strength at the two positions.

[0124] like Figure 6 (c) Figure 8 As shown in (c) in FIG. 1 , when the magnetic block 40 is at the end of the preset magnetic gap H' (eg Figure 7 and Fig. 9 In the case of displacement of -15mm or 15mm), due to the two ends of the magnetic member 10 (with Figure 4 The upper and lower ends of the magnetic member 10 in the embodiment are taken as an example) (especially under the action of the third magnetic conductor 23 and the fourth magnetic conductor 24) have the strongest magnetism, so that the upper and lower ends of the preset magnetic gap H' (with Figure 4 The magnetic flux density is the highest in the direction (taking the direction in as an example).

[0125] Therefore, during the movement of the magnetic block 40, the magnetic flux density received by the magnetic block 40 changes from large to small and then to large again, from the center position of the preset magnetic gap H' to the end of the preset magnetic gap H' (see Figure 7 and Fig. 9 The process from 0mm to 15mm in the stroke) causes the direction of the static magnetic force on the magnetic block 40 to change from negative to positive (wherein the positive direction refers to from below to above, and the negative direction refers to from above to below), that is, at the center position close to the preset magnetic gap H', the direction of the static magnetic force on the magnetic block 40 is opposite to the stroke direction, while at the end position close to the preset magnetic gap H', the direction of the static magnetic force on the magnetic block 40 is the same as the stroke direction.

[0126] For example, see Figure 7 and Fig. 9 When the displacement is 0 mm to 10 mm (positive stroke), the magnetic flux density of the magnetic field where the magnetic block 40 is located changes from large to small. 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) in the figure, 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 changes from small to large, and 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 Figure 6 (c) and Figure 8(c) in the figure, pointing from top to bottom).

[0127] In summary, and see Figure 7 and Fig. 9 In the loudspeaker 100 provided in the embodiment of the present application, within the displacement range of -8mm to 8mm, the negative stiffness introduced by the magnetic block 40 becomes a positive value, and the direction of the static magnetic force received by the magnetic block 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 slowing down the upward and downward displacement trend of the voice coil 30 at this position, thereby facilitating the voice coil 30 and the magnetic block 40 to be in an ideal initial position (that is, at a displacement of 0mm when no power is supplied), achieving centering, thereby improving the structural reliability of the loudspeaker 100 (ensuring that when the voice coil 30 is subjected to force, the voice coil 30 and other vibrating structures reciprocate along the axial direction Li of the voice coil 30), and improving the sound quality (for example, avoiding nonlinear distortion).

[0128] In order to achieve the centering of the magnetic block 40, the present application provides the following implementation methods:

[0129] Figures 10 to 18 This is a schematic diagram of the structure of the speaker 100 provided in the embodiment of the present application. It can be understood that: Figures 10 to 18 The cross-sectional views shown in the subsequent figures may be cross-sectional views of the overall structure of the speaker 100, or may be cross-sectional views of only a portion of the speaker 100, for example, Figures 10 to 18 The cross-sectional views shown in the subsequent figures can also be formed by rotating the rotation axis as shown in FIG. Figure 2 or Figure 3 The structure shown and assembled.

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

[0131] For example, see Fig.10 The first side surface 10A is an arc-shaped curved surface convex in a direction away from the magnetic member 10 .

[0132] Or, for example, see Fig.11 The first side surface 10A includes a plurality of first step surfaces U1, which are along the first direction X and point from the ends where the two magnetic poles of the magnetic member 10 are located to the middle of the magnetic member 10, and the step heights corresponding to the plurality of first step surfaces U1 gradually increase. That is, the first side surface 10A is in a raised sawtooth shape.

[0133] Or, for example, see Fig.12 The magnetic member 10 includes a first sub-portion 11 and a second sub-portion 12; the side surface of the first sub-portion 11 close to the second side surface 20A is parallel to the first direction X, and the second sub-portion 12 is arranged on the side surface of the first sub-portion 11 close to the second side surface 2A.

[0134] The size of the second sub-section 12 in the first direction X is smaller than the size of the first sub-section 11 in the first direction X. Exemplarily, the second sub-section 12 is disposed at the center of the side surface of the first sub-section 11 close to the second side surface 2A.

[0135] In some embodiments, Figure 13 to Figure 15 , the first side surface 10A is a plane and parallel to the first direction X, and the second side surface 20A is concave in a direction away from the magnetic member 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, and only the distance between the magnetic block 40 and the second side surface 20A changes from small to large and then to small.

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

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

[0138] Or, for example, see Fig.15 A groove V is formed on the second side surface 20A of at least one magnetic conductive component 20 , and the notch of the groove V faces the magnetic component 10 .

[0139] In some embodiments, Figure 16 to Figure 18 The first side surface 10A is convex in a direction away from the magnetic member 10 , and the second side surface 20A is concave in a direction away from the magnetic member 10 .

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

[0141] It can be understood that in this embodiment, the shape changes of the first side surface 10A and the second side surface 20A can be combined arbitrarily, for example, see Fig.16 The first side surface 10A may be a convex curved surface, and the second side surface 20A may be a concave curved surface, or for example, see Fig.17 The magnetic member 10 includes a first sub-portion 11 and a second sub-portion 12 (ie, the first side surface 10A has a protrusion), and the second side surface 20A can be a concave curved surface, or for example, see Fig.18 The first side surface 10A may be a convex curved surface, and a groove V is formed on the second side surface 20A of the magnetic conductive member 20 (eg, the second magnetic conductive member 22). Alternatively, other combinations and deformations may be used, which will not be described in detail here.

[0142] It can be understood that the structure of the speaker 100 provided in the embodiment of the present application is symmetrically arranged. Figure 4 and Figure 5 , the magnetic member 10 is symmetrically arranged with the reference plane N perpendicular to the first direction X as the symmetry plane, and the second side surface 20A is symmetrically arranged with the reference plane N as the symmetry plane. Thus, the magnetic field distributions corresponding to the upper and lower parts of the magnetic gap H are symmetrical to each other, so that the magnitude of the static magnetic force on the magnetic block 40 in the upward or downward direction is relatively consistent, which is conducive to retaining the magnetic block 40 in the middle position of the preset magnetic gap H', that is, it is conducive to realizing the centering function of the magnetic block 40 and reducing the probability of structural failure and other problems of the speaker 100.

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

[0144] In some embodiments, Figures 10 to 18 As shown, the speaker 100 may further include a third magnetic conductive member 23 and a fourth magnetic conductive member 24 .

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

[0146] See also Figures 10 to 18 The third magnetic conductive member 23 is disposed on the first end surface 11C.

[0147] Exemplarily, the third magnetic conductive member 23 may be a fastener, such as a metal gasket.

[0148] See also Figures 10 to 18 The side surface of the third magnetic conductive member 23 close to the magnetic conductive member 20 is spaced apart from the magnetic conductive member 20, so that the voice coil 30 can smoothly move in the magnetic gap H. In addition, by arranging the third magnetic conductive member 23 on the first end surface 11C of the magnetic member 10, a complete magnetic circuit can be formed between the magnetic member 10, the third magnetic conductive member 23 and the magnetic conductive member 20, and the third magnetic conductive member 23 can concentrate the magnetic dipoles of the magnetic member 10 into the magnetic gap H through the magnetic circuit, thereby greatly enhancing the strength of the magnetic field in the magnetic gap H.

[0149] See also Figures 10 to 18 , the fourth magnetic conductive member 24 is arranged on the second end surface 11D.

[0150] For example, see Fig.10 The fourth magnetic conductive member 24 can be integrally provided with the magnetic conductive member 20 (for example, forming a U-iron or a T-iron), thereby simplifying the preparation process of the structure in the loudspeaker 100 and reducing the difficulty of preparing the loudspeaker 100 .

[0151] Similar to the third magnetic conductive component 23, by arranging the fourth magnetic conductive component 24 on the second end face 11D of the magnetic component 10, a complete magnetic circuit can be formed between the magnetic component 10, the third magnetic conductive component 23, the magnetic conductive component 20 and the fourth magnetic conductive component 24, and the fourth magnetic conductive component 24 can also concentrate the magnetic dipoles of the magnetic component 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, Figure 4 and Figure 5 As shown, the speaker 100 may further include a basin frame 5 .

[0153] For example, see Figure 4 and Figure 5 The basin frame 5 has a concave accommodating cavity Q, and the aforementioned structures of the speaker 100 are all arranged in the accommodating cavity Q.

[0154] Exemplarily, the material of the basin frame 5 may include carbon steel, aluminum alloy or other materials with high rigidity.

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

[0156] In some embodiments, Figure 4 and Figure 5 As shown, the speaker 100 may further include a diaphragm 61. The diaphragm 61 is used to be connected to the voice coil 30 so as to vibrate and generate sound under the drive of the voice coil 30.

[0157] Among them, see Figure 4 and Figure 5 The extension direction of the diaphragm 61 intersects with the first direction X. For example, the diaphragm 61 may be perpendicular to the first direction X, or the diaphragm 61 may be arranged at an angle to the first direction X.

[0158] See also Figure 4 and Figure 5The diaphragm 61 is disposed on one side of the magnetic member 10 and is spaced apart from the magnetic member 10. The gap between the diaphragm 61 and the magnetic member 10 is used to provide space for the diaphragm 61 to vibrate.

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

[0160] Exemplarily, the material of the diaphragm 61 may include paper material, 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 the present application are not limited to this.

[0161] In some embodiments, see Figure 4 and Figure 5 The speaker 100 may further include a hanging edge 62, which may also be referred to as a folding ring. Figure 4 and Figure 5 As shown in FIG. 1 , the hanging edge 62 is nested in the periphery of the diaphragm 61. The inner side of the hanging edge 62 is as shown in FIG. Figure 6 As shown, the diaphragm 61 is bonded to its periphery, and the outer side of the hanging edge 62 is bonded to the basin frame 5 , so that the diaphragm 61 can be connected to the basin frame 5 through the hanging edge 62 .

[0162] Exemplarily, the material of the suspension 62 is an elastic material, for example, the material may include rubber. The texture of the suspension 62 is relatively soft compared to the diaphragm 61, so that the suspension 62 can realize a flexible connection between the diaphragm 61 and the basin frame 5, so as to increase the amplitude of the diaphragm 61, thereby increasing the loudness of the speaker 100.

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

[0164] See also Figure 4 and Figure 5 The voice coil 30 is arranged on the frame 70. For example, the frame 70 is cylindrical. The voice coil 30 is wound around the outer surface of the cylindrical frame 70 so as to fix the position of the voice coil 30 so that at least part of the voice coil 30 moves within the range of the magnetic gap H.

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

[0166] Exemplarily, when the speaker 100 includes two skeletons 70 and the voice coil 30 and the magnetic block 40 are respectively disposed on the two skeletons 70 , the two skeletons 70 are connected so that the voice coil 30 and the magnetic block 40 are connected to achieve synchronous vibration therebetween.

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

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

[0169] In some embodiments, Figure 4 and Figure 5 As shown, the speaker 100 may further include a spring 8 .

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

[0171] Exemplarily, the material of the elastic wave 8 may include cotton cloth, polyester fiber cloth, blended cloth, etc., which have good stretchability, are not easy to be brittle, and have good fatigue resistance.

[0172] Exemplarily, the wave damper 8 is disposed in the accommodating cavity Q of the basin frame 5 , one end of the wave damper 8 is connected to the inner wall of the accommodating cavity Q, and the other end is connected to the frame 70 .

[0173] The elastic wave 8 is connected to the skeleton 70, so as to 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 magnetic block 40, or during the use of the speaker 100, the voice coil 30 and / or the magnetic block 40 may be deformed in a 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 elastic wave 8, the position of the voice coil 30 and the magnetic block 40 that are offset in the direction perpendicular to the first direction X can be corrected.

[0174] Exemplarily, the elastic wave 8 may also include other connection methods that can realize the positioning of the voice coil 30 in a direction perpendicular to the first direction X. The embodiment of the present application only uses the example of the elastic wave 8 being respectively connected to the basin frame 5 and the frame 70 for illustration, and does not limit its specific setting position and connection method.

[0175] In order to enhance the centering effect of the magnetic block 40 in the aforementioned speaker 100, the present application further provides the following implementations:

[0176] In some embodiments, Fig.11 , Fig.18 As shown in FIGS. 1 and 1 , a surface of the fourth magnetic conductive member 24 close to the magnetic conductive member 20 is spaced apart from the magnetic conductive member 20 .

[0177] Fig.19 The figure includes an analysis curve of the displacement-negative stiffness of the loudspeaker 100 corresponding to the case where the first side surface 10A is a convex curved surface and an analysis curve of the displacement-negative stiffness of the loudspeaker 100 corresponding to the case where the second side surface 20A is a concave curved surface when the fourth magnetic conductive member 24 is spaced apart from the magnetic conductive member 20.

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

[0179] By arranging the end of the fourth magnetic conductive member 24 close to the magnetic conductive member 20 to be spaced apart from the magnetic conductive member 20, the magnetic induction intensity distribution of the magnetic block 40 in the preset magnetic gap H' can be symmetrical about the positive and negative strokes. For example, the distribution density of the magnetic flux lines of the two is roughly the same, so that the voice coil 30 and the magnetic block 40 can be moved upward (by Fig.18 The thrust (including Lorentz magnetic force and static magnetic force) received during the upward movement (taking the orientation in the middle as an example) is roughly equal to the thrust received during the downward movement, that is, the forces on the magnetic block 40 in the positive stroke and the negative stroke are symmetrical, thereby improving the structural reliability and sound quality of the speaker 100.

[0180] In some embodiments, Fig. 20 As shown, the loudspeaker 100 may further include a second voice coil 32 .

[0181] The second voice coil 32 is fixedly connected to the voice coil 30. Fig. 20 Both can be wound on the same frame 70, so as to achieve the following movement between the voice coil 30 and the second voice coil 32. It can be understood that other design methods that can achieve a fixed connection between the second voice coil 32 and the voice coil 30, so as to achieve the following movement of the two are within the protection scope of this application, and this application does not impose any restrictions on this.

[0182] Exemplarily, the second voice coil 32 may 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 may be wound by the same wire at different positions (for example, at both ends of the frame 70). Or, for example, the voice coil 30 and the second voice coil 32 may be electrically connected by another wire or other conductive structure, or may be connected to the same power supply at the same time, which is not limited in the present application.

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

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

[0185] Among them, see Fig. 20 The voice coil 30, the magnetic block 40 and the second voice coil 32 may be located in the same magnetic gap H, and the voice coil 30 and the second voice coil 32 may be disposed on both sides of the magnetic block 40. For example, the voice coil 30 and the second voice coil 32 may be symmetrically disposed with the magnetic block 40 as a symmetry point.

[0186] For example, see Fig. 20 At least part of the voice coil 30 is disposed between the third magnetic conductive member 23 and the magnetic conductive member 20, and at least part of the second voice coil 32 is disposed between the fourth magnetic conductive member 24 and the magnetic conductive member 20. That is, the voice coil 30 is approximately in the upper half of the magnetic gap H (with Fig. 20 The second voice coil 32 moves approximately in the lower half of the magnetic gap H.

[0187] By arranging the voice coil 30 and the second voice coil 32 on both sides of the magnetic block 40, the magnetic field distribution of the magnetic block 40 in the positive stroke and the negative stroke is the same, that is, the symmetry of the positive and negative strokes of the magnetic block 40 is achieved, thereby facilitating the centering of the magnetic block 40.

[0188] Figure 21 to Figure 23A schematic diagram of the structure of the speaker 100 provided in an embodiment of the present application.

[0189] In some embodiments, each structure in the speaker 100 may be circular, square, oval, racetrack-shaped, or ring-shaped corresponding to the above-mentioned figure, for example, see Fig.21 and Fig. 22 The magnetic conductive member 20 and the magnetic member 10 in the speaker 100 may be in a circular shape, or, for example, refer to Fig.23 The magnetic conductive member 20, the magnetic member 10 and other structures in the speaker 100 may be rectangular, and this application does not impose any limitation on this.

[0190] In some embodiments, Fig.21 and Fig. 22 As shown, the speaker 100 may be an external magnetic structure or an internal magnetic structure, and the present application does not limit this.

[0191] For example, see Fig.21 The speaker 100 is an external magnetic structure, and the magnetic component 10 is arranged around the magnetic conductive component 20.

[0192] Or, for example, see Fig. 22 The speaker 100 has an internal magnetic structure, and the magnetic conductive component 20 is arranged around the magnetic component 10.

[0193] It should be noted that the “magnetic lines of force” mentioned in the embodiments of the present application are not real objects, but are only used to illustrate and explain the distribution of the magnetic field.

[0194] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions 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 should be based on the protection scope of the claims.

Claims

1. A loudspeaker, characterized in that: include: A magnetic member, wherein two magnetic poles of the magnetic member are arranged along a first direction; At least one magnetic conductive member is arranged in a second direction and spaced apart from the magnetic member to form at least one magnetic gap with the magnetic member; the second direction is perpendicular to the first direction; a voice coil disposed at least partially in 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 current is passed through it; Among them, in the at least one magnetic gap, the magnetic gap in which the magnetic block is provided is a preset magnetic gap, and the two side surfaces forming the preset magnetic gap are a first side surface and a second side surface, the first side surface is a side surface of the two side surfaces belonging to the magnetic member, and the second side surface is a side surface of the two side surfaces belonging to the magnetic conductive member; Wherein, the first side surface is convex in a direction away from the magnetic component; and / or the second side surface is concave in a direction away from the magnetic component.

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

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

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

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 arranged on the surface of the first sub-part close to the second side surface; the size of the second sub-part in the first direction is smaller than the size of the first sub-part in the first direction.

6. The loudspeaker according to claim 1, characterized in that The first side surface is a plane, and the second side surface is concave in a direction away from the magnetic component.

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

8. The loudspeaker according to claim 6, characterized in that The second side surface includes a plurality of second step surfaces, and the heights of the plurality of second step surfaces gradually increase along a direction from the middle of the magnetic member to the ends of the magnetic member where the two magnetic poles are located.

9. The loudspeaker according to claim 6, characterized in that A groove is formed on the second side surface, and the notch of the groove faces the magnetic component.

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

11. The loudspeaker according to any one of claims 1 to 10, characterized in that: The loudspeaker comprises a magnetic conductive member, a magnetic gap is formed between the magnetic conductive member and the magnetic member, and at least a part of the voice coil and the magnetic block are both arranged in the magnetic gap.

12. The loudspeaker according to any one of claims 1 to 10, characterized in that: The at least one magnetic conductive component includes a first magnetic conductive component and a second magnetic conductive component, the first magnetic conductive component and the second magnetic conductive component are arranged on opposite sides of the magnetic component along the second direction, and the first magnetic conductive component and the magnetic component are spaced apart to form a first magnetic gap, at least a portion of the voice coil is arranged in the first magnetic gap, and the second magnetic conductive component and the magnetic component are spaced apart to form the preset magnetic gap.

13. The loudspeaker according to any one of claims 1 to 12, characterized in that: The magnetic member has a first end surface and a second end surface which are arranged opposite to each other, and the first end surface and the second end surface are arranged along the first direction; The speaker also includes: A third magnetic conductive member is disposed on the first end surface, and a side surface of the third magnetic conductive member close to the at least one magnetic conductive member is spaced apart from the at least one magnetic conductive member; The fourth magnetic conductive component is disposed on the second end surface, and a side surface of the fourth magnetic conductive component close to the at least one magnetic conductive component is spaced apart from the at least one magnetic conductive component.

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

Images