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 first magnetic piece, a first magnetic conducting piece, a second magnetic conducting piece, a first voice coil and a first magnetic block. The first magnetic member has a first side and a second side. The first magnetic conducting piece is arranged on one side of the first side surface of the first magnetic piece; the first magnetic conductive member is spaced from the first side surface so as to form at least part of a first magnetic gap between the first magnetic conductive member and the first magnetic member. The second magnetic conducting piece is arranged on one side of the second side surface of the first magnetic piece; the second magnetic conductive member is spaced from the second side surface so as to form at least part of a second magnetic gap between the second magnetic conductive member and the first magnetic member. At least part of the first voice coil is arranged in the first magnetic gap. The first magnetic block is arranged in the second magnetic gap; and the first magnetic block is configured to synchronously vibrate with the first voice coil after being electrified. The structural design of the loudspeaker can effectively and fully compensate the stress of the voice coil and improve the loudness of the loudspeaker without influencing the quality factor of the loudspeaker.

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] By increasing the magnetic induction intensity of the magnetic field where the voice coil is located in the speaker, the loudness of the speaker (i.e., the amplitude of the diaphragm) can be increased. However, on the one hand, increasing the magnetic induction intensity of the magnetic field requires increasing the volume of the magnet or increasing the current transmitted in the voice coil, which can easily lead to an increase in the preparation cost of the speaker or an increase in power consumption. On the other hand, as the magnetic induction intensity of the magnetic field where the voice coil is located increases, the quality factor of the speaker will gradually decrease, which can easily lead to damage to the sound quality of the speaker, and especially affect the low-frequency response of the low-frequency speaker.

[0004] How to improve the loudness of the speaker while ensuring the sound quality of the speaker has become a problem that needs to be solved urgently. Summary of the invention

[0005] The embodiments of the present application provide a speaker and an electronic device, the purpose of which is to fully compensate for the force applied to the voice coil without affecting the quality factor of the speaker, thereby effectively improving the loudness of the speaker.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, a speaker is provided. The speaker includes a first magnetic member, a first magnetic conductive member, a second magnetic conductive member, a first voice coil and a first magnetic block.

[0008] The two magnetic poles of the first magnetic member are arranged along the first direction; the first magnetic member has a first side surface and a second side surface that are arranged opposite to each other, and at least one of the first side surface and the second side surface is parallel to the first direction. The first magnetic conductive member is arranged on one side of the first side surface of the first magnetic member; the first magnetic conductive member is spaced apart from the first side surface to form at least part of the first magnetic gap between the first magnetic member. The second magnetic conductive member is arranged on one side of the second side surface of the first magnetic member; the second magnetic conductive member is spaced apart from the second side surface to form at least part of the second magnetic gap between the first magnetic member. At least part of the first voice coil is arranged in the first magnetic gap. The first magnetic block is arranged in the second magnetic gap; the first magnetic block is configured to vibrate synchronously with the first voice coil after current is passed through it.

[0009] In the speaker provided in the embodiment of the present application, by providing a first magnetic block connected to the first voice coil, compensation for the driving force of the first voice coil can be achieved, that is, the thrust in the speaker is increased, thereby enhancing the amplitude of the speaker without enhancing the magnetic field of the speaker, without excessively increasing the cost, increasing the power consumption, and without losing the quality factor of the speaker, thereby taking into account both the loudness and sound quality of the speaker.

[0010] In addition, by setting the first voice coil in the first magnetic gap and the first magnetic block in the second magnetic gap, the magnetic field where the first voice coil is located and the magnetic field where the first magnetic block is located can be decoupled, thereby avoiding the first voice coil and the first magnetic block sharing the same magnetic field and causing mutual interference between the two. This can fully enhance the force on the first magnetic block without affecting the first voice coil, thereby widening the upper limit of the loudness of the speaker that can be enhanced.

[0011] In a possible implementation of the first aspect, the speaker further includes a diaphragm, a first frame, and a second frame. The extension direction of the diaphragm intersects with the first direction; the diaphragm is arranged on one side of the first magnetic member and is spaced apart from the first magnetic member. The first voice coil is arranged on the first frame, and the first magnetic block is arranged on the second frame; the first frame and the second frame are both connected to the diaphragm to achieve synchronous vibration between the first voice coil and the first magnetic block.

[0012] In a possible implementation of the first aspect, the speaker further includes a basin frame and a spring wave. The basin frame has a concave accommodating cavity. The spring wave is arranged in the accommodating cavity, and one end is connected to the inner wall of the accommodating cavity, and the other end is connected to the first frame or the second frame, so as to correct the position of the first voice coil and the first magnetic block that are offset in a direction perpendicular to the first direction.

[0013] In a possible implementation manner of the first aspect, the speaker further includes a second magnetic block and a third magnetic block, and the second magnetic block and the third magnetic block are arranged on both sides of the first voice coil along the first direction.

[0014] During the movement of the first voice coil, the second magnetic block and the third magnetic block can be driven to move synchronously in the first magnetic gap. The second magnetic block and the third magnetic block are subjected to static magnetic force under the combined action of their own magnetic field and the magnetic field generated by the first magnetic component in the first magnetic gap, and the direction of the force is the same as the direction of the Lorentz magnetic force exerted on the first voice coil. This can further compensate for the force exerted on the first voice coil, thereby further increasing the amplitude of the first voice coil and enhancing the loudness of the speaker.

[0015] In a possible implementation manner of the first aspect, the first magnetic member has a first end surface and a second end surface that are oppositely disposed, and the first end surface and the second end surface are perpendicular to the first direction.

[0016] The speaker further includes a third magnetic conductive member and a fourth magnetic conductive member. The third magnetic conductive member is disposed on the first end surface, and a side surface of the third magnetic conductive member close to the first magnetic conductive member is spaced apart from the first magnetic conductive member to form a part of the first magnetic gap, and a side surface of the third magnetic conductive member close to the second magnetic conductive member is spaced apart from the second magnetic conductive member to form a part of the second magnetic gap. The fourth magnetic conductive member is disposed on the second end surface.

[0017] By arranging the third magnetic conductive member at intervals from the first magnetic conductive member and the second magnetic conductive member, respectively, the first voice coil can move smoothly in the first magnetic gap, and the first magnetic block can move smoothly in the second magnetic gap. In addition, by arranging the third magnetic conductive member on the first end face of the first magnetic member, a complete magnetic circuit can be formed between the first magnetic member, the third magnetic conductive member and the first magnetic conductive member, and the third magnetic conductive member can concentrate the magnetic dipole of the first magnetic member into the first magnetic gap through the magnetic circuit, thereby greatly enhancing the strength of the magnetic field in the first magnetic gap. Similarly, the strength of the magnetic field in the second magnetic gap can also be greatly enhanced. Similarly, the fourth magnetic conductive member can also greatly enhance the strength of the magnetic field in the first magnetic gap and the second magnetic gap.

[0018] In a possible implementation manner of the first aspect, one end of the fourth magnetic conductive member close to the first magnetic conductive member is connected to the first magnetic conductive member.

[0019] The speaker also includes a second magnetic member. The second magnetic member is arranged on a surface of the third magnetic member away from the first magnetic member and at an end of the third magnetic member close to the first magnetic member; two magnetic poles of the second magnetic member are arranged along a first direction, and the direction of the magnetic flux lines inside the second magnetic member is opposite to the direction of the magnetic flux lines inside the first magnetic member.

[0020] By setting a second magnetic component and setting the direction of the magnetic flux lines inside the second magnetic component to be opposite to the direction of the magnetic flux lines inside the first magnetic component, the magnetic field distribution at the first end surface of the first magnetic component can be corrected to make it the same as the magnetic field distribution at the second end surface of the first magnetic component, thereby improving the sound quality of the speaker.

[0021] In a possible implementation manner of the first aspect, an end of the fourth magnetic conductive member close to the first magnetic conductive member is spaced apart from the first magnetic conductive member to form another part of the first magnetic gap.

[0022] The speaker also includes a second voice coil. The second voice coil is fixedly connected to the first voice coil, and the second voice coil is configured to transmit a current in the opposite direction to the current transmitted by the first voice coil. At least part of the first voice coil is disposed between the third magnetic conductive member and the first magnetic conductive member, and at least part of the second voice coil is disposed between the fourth magnetic conductive member and the first magnetic conductive member. Thus, the force of the first voice coil fixedly connected to the second voice coil is compensated by the Lorentz magnetic force exerted on the second voice coil, and the thrust on the first voice coil is further increased, thereby further improving the loudness of the speaker.

[0023] In a possible implementation of the first aspect, the side of the fourth magnetic conductive member close to the second magnetic conductive member is spaced apart from the second magnetic conductive member to form another part of the second magnetic gap, so that the first magnetic block is in the same magnetic field distribution during the upward and downward movements, that is, the magnitude of the static magnetic force it is subjected to is the same, which is beneficial to improving the stability of the speaker sound quality.

[0024] In a possible implementation of the first aspect, the second side surface of the first magnetic member is recessed toward the first side surface to enhance the magnetic field strength in the second magnetic gap, or is protruded toward the first side surface to achieve centering of the first magnetic block.

[0025] In a possible implementation manner of the first aspect, the first magnetic block is magnetic or magnetically conductive.

[0026] In a possible implementation of the first aspect, at least one of the first magnetic conductive member and the second magnetic conductive member has a magnetizing zone; and / or, when the speaker includes at least one of the second magnetic block, the third magnetic block, the third magnetic conductive member and the fourth magnetic conductive member, at least one of the second magnetic block, the third magnetic block, the third magnetic conductive member and the fourth magnetic conductive member has a magnetizing zone.

[0027] The direction of the magnetic flux lines inside the magnetizing area is the same as the direction of the magnetic flux lines of the first magnetic member at the magnetizing area, thereby enhancing the strength of the magnetic field where the first voice coil and the first magnetic block are located, further improving the loudness of the speaker.

[0028] In a possible implementation of the first aspect, the first magnetic member is arranged around the first magnetic conductive member, and the second magnetic conductive member is arranged around the first magnetic member; or, the first magnetic member is arranged around the second magnetic conductive member, and the first magnetic conductive member is arranged around the first magnetic member.

[0029] 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.

[0030] 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

[0031] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0032] Figure 2 An exploded diagram of the structure of the speaker provided in the embodiment of the present application;

[0033] Figure 3 For along Figure 2A cross-sectional view of the loudspeaker in the assembled state along the section line AA';

[0034] Figure 4 Another cross-sectional view of the loudspeaker provided in an embodiment of the present application;

[0035] Figure 5 A displacement-static magneto-force analysis diagram and a displacement-negative stiffness analysis diagram corresponding to the loudspeaker;

[0036] Figure 6 Another cross-sectional view of the loudspeaker provided in an embodiment of the present application;

[0037] Figure 7 Another cross-sectional view of the loudspeaker provided in an embodiment of the present application;

[0038] Figure 8 Another displacement-magnetostatic force analysis diagram and displacement-negative stiffness analysis diagram corresponding to the loudspeaker;

[0039] Fig. 9 Another cross-sectional view of the loudspeaker provided in an embodiment of the present application;

[0040] Fig.10 A magnetic field distribution diagram of a speaker provided in an embodiment of the present application;

[0041] Figures 11 to 19 Another cross-sectional view of the loudspeaker provided in an embodiment of the present application;

[0042] Fig. 20 Another displacement-static magnetoforce analysis diagram and displacement-negative stiffness analysis diagram corresponding to the loudspeaker. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] “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.

[0049] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] Figure 1 A schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application.

[0055] 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.

[0056] 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 .

[0057] 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.

[0058] Exemplarily, the speaker 100 may be a dynamic speaker.

[0059] The housing 200 serves as a protective structure for accommodating the speaker 100 and protecting the speaker 100 from external damage.

[0060] 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 .

[0061] 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.

[0062] 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.

[0063] 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).

[0064] 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 generate sound.

[0065] 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.

[0066] In order to solve the above technical problem (improving the sound pressure level), the embodiment of the present application further provides a speaker 100.

[0067] Figure 2 This is an exploded view of the structure of the speaker 100 provided in the embodiment of the present application. Figure 3 For along Figure 2A cross-sectional view of the loudspeaker 100 in an assembled state, taken along the section line AA' in FIG. Figure 4 It is a cross-sectional view of the speaker 100 in another assembled state.

[0068] like Figure 2 , Figure 3 and Figure 4 As shown, the loudspeaker 100 includes a first magnetic member 11 , a first magnetic conductive member 21 , a second magnetic conductive member 22 , a first voice coil 31 and a first magnetic block 41 .

[0069] The first magnetic member 11 has magnetism, for example, is a permanent magnet, and two magnetic poles (N pole and S pole) of the first magnetic member 11 are arranged along the first direction X.

[0070] For example, the first magnetic member 11 is directed upward (in Figure 3 For example, the end of the first magnetic member 11 pointing upward is the N pole, and the end pointing downward is the S pole. Inside the first magnetic member 11, the magnetic flux lines of the first magnetic member 11 point from the bottom to the top (i.e., the S pole points to the N pole), and outside the first magnetic member 11, the magnetic flux lines of the first magnetic member 11 point from the top to the bottom (i.e., the N pole points to the S pole). Or, for example, the upward end of the first magnetic member 11 can be the S pole, and the downward end can be the N pole, and this application does not limit this.

[0071] like Figure 3 and Figure 4 As shown, the first magnetic member 11 has a first side surface 11A and a second side surface 11B that are oppositely disposed, and at least one of the first side surface 11A and the second side surface 11B is parallel to the first direction X.

[0072] For example, see Figure 2 The first magnetic member 11 may be annular, the inner surface of the annular structure may be used as the first side surface 11A, and the outer surface of the annular structure may be used as the second side surface 11B.

[0073] It can be understood that the "parallel" here is only to illustrate that the extension direction of at least one of the first side surface 11A and the second side surface 11B is roughly the same as the extension direction of the first direction X, and does not limit at least one of the first side surface 11A and the second side surface 11B to be completely parallel to the first direction X. For example, the first side surface 11A can be roughly parallel to the first direction X, that is, the two can be completely parallel or have a certain angle between them. Of course, the angle can be an acute angle, an obtuse angle, etc.

[0074] See also Figure 3 and Figure 4 The first magnetic conductive member 21 is disposed on one side of the first side surface 11A of the first magnetic member 11 , and the first magnetic conductive member 21 is spaced apart from the first side surface 11A of the first magnetic member 11 to form at least a portion of the first magnetic gap H1 .

[0075] Here, “at least part of the first magnetic gap H1” means that the first magnetic gap H1 can be directly formed between the first magnetic conductive member 21 and the first magnetic member 11 (for example Figure 3 and Figure 4 As shown), or forming a part of the first magnetic gap H1, for example, in the subsequent Figure 7 In the structure shown, the gap between the first magnetic conductive member 21 and the first magnetic member 11 is only a part of the first magnetic gap H1 , and the first magnetic gap H1 also includes the gap between the third magnetic conductive member 23 and the first magnetic conductive member 21 .

[0076] It can be understood that the magnetic flux lines emitted by the first magnetic member 11 and located in the first magnetic gap H1 are approximately perpendicular to the first direction X, that is, a magnetic field perpendicular to the first direction X is formed in the first magnetic gap H1. When the first voice coil 31 is arranged in the first magnetic gap H1, the magnetic field can make the first voice coil 31 to which current is passed move along the first direction X, thereby driving the diaphragm and other sound-generating structures to produce sound.

[0077] Exemplarily, the first magnetic conductive member 21 has magnetism or magnetic conductivity, so as to facilitate the formation of a magnetic field between the first magnetic conductive member 21 and the first magnetic member 11 (especially in the first magnetic gap H1).

[0078] For example, the material of the first magnetic conductive member 21 may include neodymium iron boron, iron, low carbon steel, iron aluminum or nickel iron.

[0079] Exemplarily, when the first magnetic conductive member 21 is magnetic, the direction of the magnetic flux lines inside the first magnetic conductive member 21 is the same as the direction of the magnetic flux lines of the first magnetic member 11 at the position where the first magnetic conductive member 21 is located, that is, opposite to the magnetization direction of the first magnetic member 11.

[0080] By setting the first magnetic conductive component 21 to be magnetic, the magnetic field strength between the first magnetic component 11 and the first magnetic conductive component 21 can be enhanced, that is, the magnetic field strength in the first magnetic gap H1 can be enhanced, thereby increasing the Lorentz magnetic force on the first voice coil 31 when it is in the first magnetic gap H1, which is beneficial to increasing the amplitude of the first voice coil 31 (that is, the amplitude of the diaphragm), thereby increasing the loudness (that is, the sound pressure level) of the speaker 100.

[0081] See also Figure 3 and Figure 4 The second magnetic conductive member 22 is disposed on one side of the second side surface 11B of the first magnetic member 11, and the second magnetic conductive member 22 is spaced apart from the second side surface 11B of the first magnetic member 11 to form at least a portion of the second magnetic gap H2.

[0082] Here, “at least part of the second magnetic gap H2” means that the second magnetic gap H2 can be directly formed between the second magnetic conductive member 22 and the first magnetic member 11 (e.g. Figure 3 and Figure 4 ), or forms part of the second magnetic gap H2, for example, Figure 7 In the structure shown, the gap between the second magnetic conductive member 22 and the first magnetic member 11 is only a part of the second magnetic gap H2 , and the second magnetic gap H2 also includes the gap between the third magnetic conductive member 23 and the second magnetic conductive member 22 .

[0083] Exemplarily, the material and other features of the second magnetic conductive component 22 may be the same as those of the first magnetic conductive component 21 , which will not be described in detail here.

[0084] See also Figure 3 and Figure 4 At least part of the first voice coil 31 is disposed in the first magnetic gap H1. That is, at least part of the first voice coil 31 is in a magnetic field whose magnetic flux lines are perpendicular to the first direction X.

[0085] For example, see Figure 2 The first voice coil 31 may be a coil wound by a conducting wire, for example, an enameled wire wound on a frame (eg, the first frame 71).

[0086] Exemplarily, the first voice coil 31 is a sheet-like annular structure with a light mass so as to achieve high-frequency vibration, thereby driving the vibration of structures such as a diaphragm, thereby driving the air to make sounds.

[0087] Understandably, see Figure 3 and Figure 4 , the axis Li of the first voice coil 31 is the same as the first direction X, and the aforementioned first magnetic gap H1 transmits a magnetic field perpendicular to the axis Li of the first voice coil 31. According to the left-hand rule, the magnetic field can cause the first voice coil 31 to be subjected to the Lorentz magnetic force when current is transmitted in the first voice coil 31, and the force direction is parallel to the extension direction of the axis Li of the first voice coil 31. The Lorentz magnetic force drives the first voice coil 31 to cut the magnetic flux lines in the first magnetic gap H1, that is, drives the first voice coil 31 to move along its axial direction (that is, the first direction X).

[0088] It can be understood that the first voice coil 31 is configured to transmit alternating current so as to achieve reciprocating motion of the first voice coil 31 in the first magnetic gap H1 .

[0089] See also Figure 3 and Figure 4 , the first magnetic block 41 is disposed in the second magnetic gap H2. That is, the first magnetic block 41 is in a magnetic field whose magnetic flux lines are perpendicular to the first direction X.

[0090] Exemplarily, the first magnetic block 41 may be magnetic or magnetically permeable. For example, the first magnetic block 41 may be a permanent magnet or soft iron, or the material of the first magnetic block 41 may include neodymium iron boron, iron, low carbon steel, iron aluminum or nickel iron.

[0091] 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.

[0092] When the first magnetic block 41 with magnetism or magnetic conductivity is in the magnetic field of the second magnetic gap H2, it will form a magnetic field with a magnetic field direction opposite to the magnetic field direction of the first magnetic member 11. At this time, the first magnetic block 41 is subjected to a static magnetic force under the action of its own magnetic field and the magnetic field of the first magnetic member 11. Figure 3 and Figure 4 When the first magnetic block 41 moves upward (taking the direction in the middle as an example), the first magnetic block 41 will be subjected to an upward static magnetic force, and when the first magnetic block 41 moves downward, the first magnetic block 41 will be subjected to a downward static magnetic force.

[0093] The first magnetic block 41 is configured to vibrate synchronously with the first voice coil 31 after current is supplied thereto.

[0094] For example, the first magnetic block 41 may be connected to the first voice coil 31 , so that when the first voice coil 31 moves, the first magnetic block 41 is driven to move synchronously in the second magnetic gap H2 .

[0095] It should be noted that the "synchronous vibration" here is only to illustrate the characteristics of the first voice coil 31 and the first magnetic block 41 influencing each other and following each other, and does not limit the two to perform completely synchronous movement in a strict sense at any time. For example, in the process of just passing the current, the first voice coil 31 is displaced under the joint action of the magnetic field generated by the current and the magnetic field generated by the first magnetic member 11 (i.e., under the action of the Lorentz magnetic force), thereby driving the first magnetic block 41 connected to the first voice coil 31 to displace, and the first magnetic block 41 that undergoes passive displacement is subjected to the static magnetic force under the joint action of its own magnetic field and the magnetic field of the first magnetic member 11, resulting in additional displacement, thereby driving the first voice coil 31 connected to the first magnetic block 41 to further displace, that is, compensating for the force on the first voice coil 31. Therefore, it can be seen that the aforementioned "synchronous vibration" can be understood as the two following each other.

[0096] In the related art, when the first magnetic block 41 is not provided, the vibration system model of the speaker is as follows:

[0097]

[0098] Among them, F 0(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 the first voice coil, diaphragm and other structures), m (kg) is the equivalent vibrating mass, t (s) is the time, r (N×s / m) is the friction damping, and ω is the vibration angular frequency.

[0099] Through this vibration system model, it can be deduced that the solution of the speaker amplitude is:

[0100]

[0101] 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.

[0102] From this we can see that when the low frequency vibration, that is, ω<<ω 0 When the amplitude At this time, the amplitude x is mainly determined by the applied electromagnetic force F 0 and stiffness s control.

[0103] From the above formula, we can see that in order to increase the loudness of the speaker (i.e., increase the amplitude), we need to increase the thrust F 0 (i.e. electromagnetic force), or the stiffness s needs to be reduced.

[0104] 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.

[0105] In the speaker 100 provided in the embodiment of the present application, by providing the first magnetic block 41 connected to the first voice coil 31, the first magnetic block 41 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 of the first voice coil 31, where s mag is the negative stiffness, negative stiffness s mag The larger the magnetostatic force F mag The larger the value is, the greater the compensation for the force on the first voice coil 31 is.

[0106] In the embodiment provided by the present application, the vibration system model of the speaker 100 becomes:

[0107]

[0108]

[0109] It can be deduced from the vibration system model that the solution of the amplitude of the loudspeaker 100 becomes:

[0110]

[0111] It can be seen from this that in the embodiment provided in this application, when the low frequency vibration is applied, that is, ω<<ω 0 When the amplitude At this time, the amplitude x is mainly determined by the applied electromagnetic force F 0 , stiffness s and negative stiffness s mag Control, in the electromagnetic force F 0 When the magnetic field strength and the current input to the voice coil remain unchanged (i.e. the magnetic field strength and the current input to 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), the negative stiffness s is introduced. 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.

[0112] 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 increasing costs, and without increasing the current input into the first voice coil 31, thereby avoiding increasing power consumption.

[0113] In addition, in the embodiment provided in the present application, by respectively arranging the first voice coil 31 and the first magnetic block 41 in different magnetic gaps, it is possible to achieve a balance between the loudness and sensitivity of the speaker 100, as specifically analyzed as follows:

[0114] The quality factor of the power system in a loudspeaker can be:

[0115]

[0116] Among them, f 0 is the resonant frequency of the speaker 100, M ms is the equivalent vibration mass of the loudspeaker 100, R e refers to the DC resistance, B refers to the strength of the magnetic field where the first voice coil 31 is located (ie, the magnetic induction intensity), L is the length of the coil of the first voice coil 31, and BL can represent the electromagnetic force F exerted on the first voice coil 31. 0 .

[0117] According to the formula of the quality factor of the speaker 100, the magnetic field strength cannot be increased infinitely. As the magnetic induction strength B increases, the quality factor of the speaker will decrease, which will cause the low frequency f 0 The reduction in sensitivity in the vicinity causes the sound quality of the speaker 100 , especially the sound quality at low frequencies, to be greatly affected.

[0118] In the embodiment provided by the present application, by setting the first voice coil 31 in the first magnetic gap H1 and the first magnetic block 41 in the second magnetic gap H2, the decoupling of the magnetic field where the first voice coil 31 is located and the magnetic field where the first magnetic block 41 is located can be achieved, so as to avoid the first voice coil 31 and the first magnetic block 41 sharing the same magnetic field, which may cause interference between the two. For example, in the case where the two share the same magnetic field, if it is desired to further enhance the static magnetic force on the first magnetic block 41, it is necessary to enhance the strength of the magnetic field shared by the two under the constraint of the size of the first magnetic block 41 (constrained by the size of the first magnetic gap H1). However, according to the above description, if the strength of the magnetic field where the first voice coil 31 is located is too large, the sound quality of the speaker 100 may be impaired. Therefore, in the case where the first voice coil 31 and the first magnetic block 41 share the same magnetic field, the static magnetic force on the first magnetic block 41 cannot be enhanced. The full enhancement of the magnetic force also limits the increase in the loudness of the speaker 100. In the embodiment provided in the present application, the magnetic fields of the first voice coil 31 and the first magnetic block 41 are decoupled (one is located in the first magnetic gap H1, and the other is located in the second magnetic gap H2). The force of the first magnetic block 41 can be adjusted without substantially affecting the force on the first voice coil 31. For example, the force (static magnetic force) on the first magnetic block 41 can be enhanced by increasing the size of the first magnetic block 41, or by adjusting the size of the second magnetic conductive member 22, the third magnetic conductive member 23, or the fourth magnetic conductive member 24, or by adjusting the material of part of the second magnetic conductive member 22 or the fourth magnetic conductive member 24 to be a permanent magnet, etc., thereby achieving full compensation for the driving force on the first voice coil 31, that is, the upper limit of the loudness enhancement of the speaker 100 can be widened.

[0119] Figure 5 Schematic diagram of displacement-magnetic static force and schematic diagram of displacement-negative stiffness of the first magnetic block 41 during the movement of the first voice coil 31 in the first magnetic gap H1.

[0120] Among them, the horizontal axis in the figure is the vibration displacement of the first voice coil 31 and the first magnetic block 41 under the action of electromagnetic force and static magnetic force, wherein the position of displacement 0 mm can correspond to the center position of the second magnetic gap H2, the left vertical axis is the static magnetic force exerted on the first magnetic block 41, and the right vertical axis is the negative stiffness introduced by the first magnetic block 41.

[0121] See also Figure 5 The closer to the center position of the second magnetic gap H2, the smaller the static magnetic force is, and the negative stiffness is almost non-existent. The farther away from the center position of the second magnetic gap H2 (i.e., displacement toward the upper and lower ends of the second magnetic gap H2, i.e., the positive stroke and the negative stroke), the greater the static magnetic force exerted on the first magnetic block 41 and the greater the negative stiffness.

[0122] It can be understood that, during the movement of the first voice coil 31, the displacement of the first voice coil 31 in the positive stroke (i.e., the displacement in the direction greater than 0, for example, toward Figure 4The positive (for example, upward) Lorentz magnetic force is applied to the upper displacement of the magnetic field, and the negative displacement (i.e., the displacement in the direction less than 0, for example, toward Figure 4 The downward displacement in the plane is subject to a negative (e.g., downward) Lorentz magnetic force.

[0123] And by Figure 5 It can be seen that during the vibration process, the direction of the static magnetic force exerted on the first magnetic block 41 is the same as the direction of the Lorentz force exerted on the first voice coil 31 (that is, the positive stroke is subjected to a positive force, and the negative stroke is subjected to a negative force), that is, the force exerted on the first voice coil 31 is successfully compensated, and negative stiffness is successfully introduced, thereby increasing the amplitude and improving the loudness of the speaker 100.

[0124] 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 Figure 2 The first magnetic conductive member 21, the second magnetic conductive member 22, etc. in the speaker 100 can all be in a circular ring shape, and the present application does not impose any limitation on this.

[0125] In some embodiments, the speaker 100 may be an external magnetic structure or an internal magnetic structure, which is not limited in the present application.

[0126] For example, see Figure 3 The speaker 100 is an external magnetic structure, the first magnetic member 11 is arranged around the first magnetic conductive member 21, and the second magnetic conductive member 22 is arranged around the first magnetic member 11.

[0127] Or, for example, see Figure 4 The speaker 100 has an internal magnetic structure, the first magnetic member 11 is arranged around the second magnetic conductive member 22, and the first magnetic conductive member 21 is arranged around the first magnetic member 11.

[0128] Understandably, Figure 3 and Figure 4 The structure shown in FIG. 1 is a cross-sectional view of the loudspeaker 100. Figure 3 and Figure 4 Each structure in the embodiment can be rotated with the axis Li of the first voice coil 31 as the rotation axis to form a cylindrical or columnar shape. It can be understood that Figure 3 and Figure 4 The sizes of the various components are exemplary only, and this application does not limit the specific sizes of the various components.

[0129] Figure 6 Another cross-sectional view of the loudspeaker 100 provided in an embodiment of the present application.

[0130] See also Figure 6 The aforementioned speaker 100 may also include but is not limited to the following structures:

[0131] In some embodiments, Figure 6 As shown, the speaker 100 may further include a basin frame 5 .

[0132] For example, see Figure 6 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.

[0133] Exemplarily, the material of the basin frame 5 may include carbon steel, aluminum alloy or other materials with high rigidity.

[0134] For example, see Figure 6 The basin frame 5 can be conical and surround the outer side of the sound-generating structure composed of the first magnetic member 11, the first magnetic conductive member 21, the second magnetic conductive member, the first voice coil 31 and the first magnetic block 41, so as to improve the sound uniformity of the speaker 100.

[0135] In some embodiments, Figure 6 As shown, the speaker 100 may further include a diaphragm 61. The diaphragm 61 is used to be connected to the first voice coil 31 so as to vibrate and generate sound under the drive of the first voice coil 31.

[0136] Among them, see Figure 6 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.

[0137] See also Figure 6 The diaphragm 61 is disposed on one side of the first magnetic member 11 and is spaced apart from the first magnetic member 11. The gap between the diaphragm 61 and the first magnetic member 11 is used to provide space for the diaphragm 61 to vibrate.

[0138] For example, see Figure 6 The aforementioned first magnetic member 11 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.

[0139] 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.

[0140] In some embodiments, see Figure 6 The speaker 100 may further include a hanging edge 62, which may also be referred to as a folding ring. Figure 6 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 6As 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 .

[0141] 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.

[0142] In some embodiments, see Figure 2 , Figure 3 , Figure 4 and Figure 6 The speaker 100 may further include a first frame 71 and a second frame 72 .

[0143] See also Figure 2 , Figure 3 , Figure 4 and Figure 6 The first voice coil 31 is arranged on the first skeleton 71. For example, the first skeleton 71 is cylindrical. The first voice coil 31 is wound around the outer surface of the cylindrical first skeleton 71 so as to fix the position of the first voice coil 31 so that at least part of the first voice coil 31 moves within the range of the first magnetic gap H1.

[0144] See also Figure 2 , Figure 3 , Figure 4 and Figure 6 The first magnetic block 41 is disposed on the second frame 72. For example, the first magnetic block 41 is fixed below the second frame 72 (with Figure 6 , for example), so as to fix the position of the first magnetic block 41 so that the first magnetic block 41 moves within the range of the second magnetic gap H2.

[0145] Exemplarily, the first skeleton 71 may be connected to the second skeleton 72 so as to connect the first voice coil 31 and the first magnetic block 41 to achieve synchronous vibration therebetween.

[0146] In this case, the first skeleton 71 is connected to the diaphragm 61 , or the second skeleton 72 is connected to the diaphragm 61 , and the movement of the first voice coil 31 can drive the diaphragm 61 to vibrate and produce sound.

[0147] Alternatively, see Figure 6 The first skeleton 71 and the second skeleton 72 are both connected to the diaphragm 61, so that the first voice coil 31 and the first magnetic block 41 can vibrate synchronously through the diaphragm 61, and the connection between the first voice coil 31 and the diaphragm 61 can be realized, so that the first voice coil 31 drives the diaphragm 61 to vibrate and produce sound.

[0148] Exemplarily, the materials of the first frame 71 and the second frame 72 may include metal aluminum, glass fiber or other rigid materials.

[0149] In some embodiments, Figure 2 and Figure 6 As shown, the speaker 100 may further include a spring 8 .

[0150] For example, the elastic wave 8 may be in a ring-shaped structure (see Figure 2 ). See Figure 6 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.

[0151] 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.

[0152] Exemplarily, the wave damper 8 is disposed in the receiving cavity Q of the basin frame 5, one end of the wave damper 8 is connected to the inner wall of the receiving cavity Q, and the other end is connected to the first frame 71 or the second frame 72. Figure 6 When the second frame 72 is disposed outside the first frame 71 (ie, the speaker 100 is an external magnetic structure), the elastic wave 8 is connected to the second frame 72 .

[0153] The elastic wave 8 is connected to the first frame 71 or the second frame 72, so as to provide a restoring force perpendicular to the first direction X for the first voice coil 31. During the movement of the first voice coil 31 and the first magnetic block 41, or during the use of the speaker 100, the first voice coil 31 and / or the first magnetic block 41 may be deformed in a direction perpendicular to the first direction X, thereby affecting the normal vibration of the first voice coil 31 and thus affecting the sound quality. By setting the elastic wave 8, the position of the first voice coil 31 and the first magnetic block 41 that are offset in the direction perpendicular to the first direction X can be corrected.

[0154] Exemplarily, the elastic wave 8 may also include other connection methods that can realize the positioning of the first voice coil 31 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 second frame 72 for illustration, and does not limit its specific setting position and connection method.

[0155] Figure 7 Another cross-sectional view of the speaker 100 provided in the embodiment of the present application, it can be understood that, Figure 7 The cross-sectional views shown in the subsequent figures may be cross-sectional views of the overall structure of the speaker 100, or, Figure 7The cross-sectional views shown in the subsequent figures are only partial cross-sectional views of the speaker 100. For example, Figure 7 The cross-sectional views shown in the subsequent figures can also be formed by rotating the rotation axis as shown in FIG. Figure 3 and Figure 4 The outer magnetic structure and the inner magnetic structure are shown.

[0156] In some embodiments, Figure 7 As shown, the speaker 100 may further include a second magnetic block 42 and a third magnetic block 43 .

[0157] See also Figure 7 The second magnetic block 42 and the third magnetic block 43 are arranged along the first direction X on both sides of the first voice coil 31 .

[0158] Exemplarily, the second magnetic block 42 and the third magnetic block 43 can be fixed on the first frame 71. For example, the second magnetic block 42 and the third magnetic block 43 are both annular and surround the side wall of the cylindrical first frame 71, so that the second magnetic block 42 and the third magnetic block 43 move in the first magnetic gap H1 under the drive of the first frame 71.

[0159] Exemplarily, the second magnetic block 42 and the third magnetic block 43 may both be magnetic or magnetically conductive. Wherein, in the case where the second magnetic block 42 and the third magnetic block 43 are magnetic, the direction of the magnetic flux lines of the second magnetic block 42 and the third magnetic block 43 may be perpendicular to the first direction X, and point from the first magnetic member 11 to the first magnetic conductive member 21 (see Figure 7 ), that is, the direction is the same as the magnetic flux lines transmitted in the first magnetic gap H1 of the first magnetic member 11, thereby enhancing the static magnetic force between the second magnetic block 42 and the first magnetic member 11, and enhancing the static magnetic force between the third magnetic block 43 and the first magnetic member 11.

[0160] It can be understood that during the movement of the first voice coil 31, the second magnetic block 42 and / or the third magnetic block 43 can be driven to move synchronously in the first magnetic gap H1. The second magnetic block 42 and the third magnetic block 43 are subjected to static magnetic force under the combined action of their own magnetic field and the magnetic field generated by the first magnetic component 11 in the first magnetic gap H1, and the direction of the force is the same as the direction of the Lorentz magnetic force exerted on the first voice coil 31, so that the force exerted on the first voice coil 31 can be further compensated, thereby further increasing the amplitude of the first voice coil 31 and enhancing the loudness of the speaker 100.

[0161] For example, see Figure 7 The materials, sizes, shapes, etc. of the second magnetic block 42 and the third magnetic block 43 can be substantially the same. By respectively arranging the second magnetic block 42 and the third magnetic block 43 on both sides of the first voice coil 31 along the first direction X, the first voice coil 31 can be moved upward and downward (in the form of Figure 7The compensation of the force received during the movement (taking the position in the middle as an example) is roughly equal, thereby improving the uniformity of the thrust received by the first voice coil 31 during the movement and enhancing the stability of the sound quality of the speaker 100.

[0162] Exemplarily, it is understandable that the speaker 100 may also include only one of the second magnetic block 42 and the third magnetic block 43 , which can also compensate for the force applied to the first voice coil 31 , increase the amplitude of the first voice coil 31 , and thus increase the loudness of the speaker 100 .

[0163] For example, Figure 8 The displacement-magnetic static force analysis diagram and the displacement-negative stiffness analysis diagram of the loudspeaker 100 in which the third magnetic block 43 is only arranged below the first voice coil 31 , and the displacement-magnetic static force analysis diagram and the displacement-negative stiffness analysis diagram corresponding to the first magnetic block 41 .

[0164] in, Figure 8 The horizontal axis in is the vibration displacement of the first voice coil 31, the first magnetic block 41 and the third magnetic block 43 under the action of the electromagnetic force and the static magnetic force, the left vertical axis is the magnitude of the static magnetic force, and the right vertical axis is the magnitude of the negative stiffness.

[0165] See also Figure 8 The static magnetic force on the first magnetic block 41 is asymmetric in the positive and negative strokes. For example, when the displacement is -10, the static magnetic force of the first magnetic block 41 is approximately -70, but when the displacement is 10, the static magnetic force of the first magnetic block 41 is approximately 50. The two are asymmetric, resulting in the negative stiffness introduced by the first magnetic block 41 being asymmetric in the positive and negative strokes, which will cause the sound quality of the speaker 100 to be damaged (such as sound distortion).

[0166] See also Figure 8 By setting the third magnetic block 43, the total static magnetic force in the speaker 100 (including the static magnetic forces exerted on the first magnetic block 41 and the third magnetic block 43) can be compensated, so that the total negative stiffness in the speaker 100 is symmetrical in the positive and negative strokes, thereby avoiding causing distortion of the sound quality of the speaker 100.

[0167] Fig. 9 Another cross-sectional view of the loudspeaker 100 provided in the embodiment of the present application, Fig.10 Schematic diagram of the magnetic field of the speaker 100 provided in an embodiment of the present application - static magnetoforce.

[0168] In some embodiments, Figure 2 , Figure 6 and Fig. 9 As shown, the speaker 100 may further include a third magnetic conductive member 23 and a fourth magnetic conductive member 24 .

[0169] See also Fig. 9The first magnetic member 11 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 perpendicular to the first direction X, for example, they are arranged opposite to each other in the first direction X.

[0170] For example, see Fig. 9 The first end surface 11C is a side surface of the first magnetic member 11 close to the diaphragm 61 , and the diaphragm 61 and the first end surface 11C are spaced apart to provide space for the vibration of the diaphragm 61 .

[0171] See also Fig. 9 The third magnetic conductive member 23 is disposed on the first end surface 11C.

[0172] Exemplarily, the third magnetic conductive member 23 may be a fastener, such as a metal gasket.

[0173] See also Fig. 9 A side surface of the third magnetic conductive member 23 close to the first magnetic conductive member 21 is spaced apart from the first magnetic conductive member 21 to form a part of the first magnetic gap H1, that is, the gap between the first magnetic conductive member 21 and the first magnetic member 11, and the gap between the first magnetic conductive member 21 and the third magnetic conductive member 23 together form the first magnetic gap H1.

[0174] See also Fig. 9 A side surface of the third magnetic conductive member 23 close to the second magnetic conductive member 22 is spaced apart from the second magnetic conductive member 22 to form a part of the second magnetic gap H2, that is, the gap between the second magnetic conductive member 22 and the first magnetic member 11, and the gap between the second magnetic conductive member 22 and the third magnetic conductive member 23 together form the second magnetic gap H2.

[0175] By arranging the third magnetic conductive member 23 to be spaced from the first magnetic conductive member 21 and the second magnetic conductive member 22, the first voice coil 31 can be smoothly moved in the first magnetic gap H1, and the first magnetic block 41 can be smoothly moved in the second magnetic gap H2. In addition, by arranging the third magnetic conductive member 23 on the first end surface 11C of the first magnetic member 11, a complete magnetic circuit can be formed between the first magnetic member 11, the third magnetic conductive member 23 and the first magnetic conductive member 21 (see Fig.10 ), and the third magnetic conductive member 23 can concentrate the magnetic dipole of the first magnetic member 11 into the first magnetic gap H1 through the magnetic circuit, thereby greatly enhancing the strength of the magnetic field in the first magnetic gap H1. Similarly, the strength of the magnetic field in the second magnetic gap H2 can also be greatly enhanced. The principle is the same as described above and will not be repeated here.

[0176] See also Fig. 9 , the fourth magnetic conductive member 24 is arranged on the second end surface 11D.

[0177] For example, see Fig. 9The fourth magnetic conductive member 24 can be integrally provided with the first magnetic conductive member 21 (eg, a U iron or a T iron), thereby simplifying the preparation process of the structure in the speaker 100 and reducing the difficulty of preparing the speaker 100 .

[0178] Alternatively, illustratively, the fourth magnetic conductive member 24 may also be provided integrally with the second magnetic conductive member 22 , which may also simplify the preparation process of the structure in the speaker 100 and reduce the difficulty of preparing the speaker 100 .

[0179] Similarly, the first magnetic conductive member 21 , the fourth magnetic conductive member 24 and the second magnetic conductive member 22 can be integrally provided.

[0180] Similar to the third magnetic conductive member 23, by arranging the fourth magnetic conductive member 24 on the second end surface 11D of the first magnetic member 11, a complete magnetic circuit can be formed between the first magnetic member 11, the third magnetic conductive member 23, the first magnetic conductive member 21 and the fourth magnetic conductive member 24 (see Fig.10 ), and the fourth magnetic conductive member 24 can also concentrate the magnetic dipole of the first magnetic member 11 into the first magnetic gap H1 through the magnetic circuit, thereby greatly enhancing the strength of the magnetic field in the first magnetic gap H1. Similarly, the strength of the magnetic field in the second magnetic gap H2 can also be greatly enhanced. The principle is the same as described above and will not be repeated here.

[0181] Fig.11 Another cross-sectional view of the loudspeaker 100 provided in an embodiment of the present application.

[0182] In some embodiments, Fig.11 As shown, one end of the fourth magnetic conductive member 24 close to the first magnetic conductive member 21 may be spaced apart from the first magnetic conductive member 21 . In this case, the speaker 100 may further include a second voice coil 32 .

[0183] The second voice coil 32 is fixedly connected to the first voice coil 31. Fig.11 , both can be wound on the first skeleton 71, or the first voice coil 31 is wound on the first skeleton 71, and the second voice coil 32 is wound on another skeleton fixedly connected to the first skeleton 71, so as to realize the following movement between the first voice coil 31 and the second voice coil 32. It can be understood that other design methods that can realize the fixed connection between the second voice coil 32 and the first voice coil 31, so as to realize the following movement of the two are all within the protection scope of this application, and this application does not limit this.

[0184] Exemplarily, the second voice coil 32 may also be electrically connected to the first voice coil 31 (not shown in the figure). For example, the first voice coil 31 and the second voice coil 32 may be wound by the same wire at different positions (for example, at both ends of the first frame 71). Or, for example, the first voice coil 31 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.

[0185] The second voice coil 32 is configured to transmit a current in a direction opposite to that of the current transmitted by the first voice coil 31 .

[0186] For example, when the first voice coil 31 and the second voice coil 32 are wound by the same wire, the winding directions of the first voice coil 31 and the second voice coil 32 are opposite. Or, for example, at the same time, the direction of the current transmitted in the first voice coil 31 and the direction of the current transmitted in the second voice coil 32 are opposite.

[0187] See also Fig.11 At least part of the first voice coil 31 is disposed between the third magnetic conductive member 23 and the first magnetic conductive member 21, and at least part of the second voice coil 32 is disposed between the fourth magnetic conductive member 24 and the first magnetic conductive member 21. That is, the first voice coil 31 is approximately disposed in the upper half (with the first magnetic gap H1) of the first magnetic gap H1. Fig.11 The second voice coil 32 moves approximately in the lower half of the first magnetic gap H1.

[0188] By setting the currents transmitted by the first voice coil 31 and the second voice coil 32 to be in opposite directions, the Lorentz magnetic forces acting on the first voice coil 31 and the second voice coil 32 can be in the same direction. For example, the direction of the magnetic flux lines in the upper half of the first magnetic gap H1, especially the direction of the magnetic flux lines in the gap between the third magnetic conductive member 23 and the first magnetic conductive member 21, is directed from the third magnetic conductive member 23 to the first magnetic conductive member 21, while the direction of the magnetic flux lines in the lower half of the first magnetic gap H1, especially the direction of the magnetic flux lines in the gap between the fourth magnetic conductive member 24 and the first magnetic conductive member 21, is directed from the first magnetic conductive member 21 to the fourth magnetic conductive member 24, that is, the direction of the magnetic flux lines in the upper half of the first magnetic gap H1 is opposite to the direction of the magnetic flux lines in the lower half thereof. When the directions of the currents transmitted by the first voice coil 31 and the second voice coil 32 are also opposite, the two magnetic fields with opposite directions of the magnetic flux lines will cause the first voice coil 31 and the second voice coil 32 to be subjected to the Lorentz magnetic forces of the same direction, thereby compensating the force on the first voice coil 31 fixedly connected to the second voice coil 32 through the Lorentz magnetic force on the second voice coil 32, further increasing the thrust on the first voice coil 31, thereby further increasing the loudness of the speaker 100.

[0189] Fig.12 Another cross-sectional view of the loudspeaker 100 provided in an embodiment of the present application.

[0190] In some embodiments, Fig.12 As shown, the second side surface 11B of the first magnetic member 11 is recessed toward the direction close to the first side surface 11A, that is, the position where the second side surface 11B of the first magnetic member 11 is connected to the first end surface 11C, and the position where the second side surface 11B of the first magnetic member 11 is connected to the second end surface 11D are more prominent relative to the center position of the first magnetic member 11, thereby enhancing the magnetic flux density gradient at these two positions, that is, enhancing the magnetic flux density gradient at the upper and lower ends of the second magnetic gap H2, thereby enhancing the static magnetic force (upward or downward pulling force) to which the first magnetic block 41 is subjected when moving upward and downward, and further improving the force compensation of the first magnetic block 41 to the first voice coil 31, thereby increasing the amplitude of the first voice coil 31 and increasing the loudness of the speaker 100.

[0191] Figure 13 to Figure 17 Another cross-sectional view of the loudspeaker 100 provided in an embodiment of the present application.

[0192] In some embodiments, Figure 13 to Figure 17 As shown, at least one of the first magnetic conductive member 21, the second magnetic conductive member 22, the second magnetic block 42, the third magnetic block 43, the third magnetic conductive member 23 and the fourth magnetic conductive member 24 has a magnetizing region U. The direction of the magnetic flux lines inside the magnetizing region U is the same as the direction of the magnetic flux lines of the first magnetic member 11 at the magnetizing region U, thereby enhancing the strength of the magnetic field formed in the speaker 100, increasing the thrust on the first voice coil 31 and / or the first magnetic block 41, and ultimately increasing the amplitude of the first voice coil 31 and the loudness of the speaker 100.

[0193] For example, see Figure 13 to Figure 17 The direction of the magnetic flux lines inside the first magnetic member 11 is from bottom to top (with Fig.13 In the case of taking the orientation in as an example), that is, when the lower side of the first magnetic member 11 is the S pole and the upper side is the N pole:

[0194] See also Fig.13 The direction of the magnetic flux lines inside the magnetizing area U at the center of the first magnetic conductive member 21 points from the top to the bottom, that is, the top of the magnetizing area U at the center of the first magnetic conductive member 21 is the S pole, and the bottom is the N pole.

[0195] See Fig.14 The direction of the magnetic flux lines inside the magnetizing area U at the position of the first magnetic conductive member 21 close to the third magnetic conductive member 23 points from the right to the left, that is, the right side of the magnetizing area U at this position is the S pole, and the left side is the N pole.

[0196] See also Fig.15The direction of the magnetic flux lines inside the magnetizing area U at the position of the second magnetic conductive member 22 close to the fourth magnetic conductive member 24 points from the right to the left, that is, the right side of the magnetizing area U at this position is the S pole, and the left side is the N pole.

[0197] See also Fig.16 The direction of the magnetic flux lines inside the magnetized area U (all magnetized in the figure, so U is not shown) in the second magnetic block 42 and the third magnetic block 43 points from the right to the left, that is, the right side of the magnetized area U of the second magnetic block 42 and the third magnetic block 43 is the S pole, and the left side is the N pole.

[0198] See also Fig.17 The direction of the magnetic flux lines inside the magnetizing area U in the third magnetic conductive member 23 points from the right to the left, that is, the right side of the magnetizing area U in the third magnetic conductive member 23 is the S pole, and the left side is the N pole.

[0199] See also Fig.17 The direction of the magnetic flux lines inside the magnetizing area U in the fourth magnetic conductive member 24 points from the left to the right, that is, the left side of the magnetizing area U in the fourth magnetic conductive member 24 is the S pole, and the right side is the N pole.

[0200] By setting the above-mentioned magnetizing zone U and setting the direction of the magnetic flux lines inside the magnetizing zone U to be the same as the direction of the magnetic flux lines of the first magnetic member 11 at the position of the magnetizing zone U, the strength of the magnetic field is further superimposed and enhanced on the basis of the magnetic field formed by the first magnetic member 11, so as to increase the amplitude of the first voice coil 31 and increase the loudness of the speaker 100.

[0201] It can be understood that in the drawings of the present application, the position marked with a short arrow “→” is the magnetic position, and the direction indicated by the short arrow is the direction of the internal magnetic flux lines there.

[0202] During the movement of the first voice coil 31 and the first magnetic block 41, if the thrusts received by the two when they move upward and downward are the same, nonlinear distortion caused by asymmetric negative stiffness can be avoided, distortion of the timbre of the speaker 100 can be avoided, and the sound quality of the speaker 100 can be improved.

[0203] In order to ensure that the thrusts received by the first voice coil 31 and the first magnetic block 41 when they move upward and downward are the same during their movement, the present application further provides the following embodiments:

[0204] In some embodiments, Fig.11 and Fig.12As shown, one end of the fourth magnetic conductive member 24 close to the first magnetic conductive member 21 is spaced apart from the first magnetic conductive member 21 to form another part of the first magnetic gap H1. That is, the gap between the first magnetic conductive member 21 and the first magnetic member 11, the gap between the first magnetic conductive member 21 and the third magnetic conductive member 23, and the gap between the first magnetic conductive member 21 and the fourth magnetic conductive member 24 together form the first magnetic gap H1.

[0205] By arranging the end of the fourth magnetic conductive member 24 close to the first magnetic conductive member 21 to be spaced apart from the first magnetic conductive member 21, the magnetic field distribution at the first end surface 11C of the first magnetic member 11 can be substantially the same as the magnetic field distribution at the second end surface 11D of the first magnetic member 11. For example, the distribution density of the magnetic flux lines of the two is substantially the same, so that the first voice coil 31 and the first magnetic block 41 can be moved upward (by Fig.12 The thrust (including Lorentz force and static magnetomagnetic force) received during the upward movement (taking the upward direction as an example) is roughly equal to the thrust received during the downward movement, thereby improving the stability of the sound quality of the speaker 100.

[0206] In some embodiments, Fig. 9 , Fig.11 and Fig.12 As shown in many figures, one end of the fourth magnetic conductive member 24 close to the second magnetic conductive member 22 is spaced apart from the second magnetic conductive member 22 to form another part of the second magnetic gap H2. That is, the gap between the second magnetic conductive member 22 and the first magnetic member 11, the gap between the second magnetic conductive member 22 and the third magnetic conductive member 23, and the gap between the second magnetic conductive member 22 and the fourth magnetic conductive member 24 together form the second magnetic gap H2.

[0207] Similar to the previous embodiment, by arranging the end of the fourth magnetic conductive member 24 close to the second magnetic conductive member 22 to be spaced apart from the second magnetic conductive member 22, the thrust (including Lorentz magnetic force and static magnetic force) received by the first voice coil 31 and the first magnetic block 41 during the upward movement and the thrust received during the downward movement can be roughly equal, thereby improving the stability of the sound quality of the speaker 100.

[0208] Fig.18 Another cross-sectional view of the loudspeaker 100 provided in an embodiment of the present application.

[0209] In some embodiments, Fig.18 As shown, when one end of the fourth magnetic conductive member 24 close to the first magnetic conductive member 21 is connected to the first magnetic conductive member 21:

[0210] See also Fig.18The speaker 100 may further include a second magnetic member 12 . The second magnetic member 12 is disposed on a surface of the third magnetic conductive member 23 away from the first magnetic member 11 , and is disposed at an end of the third magnetic conductive member 23 close to the first magnetic conductive member 21 .

[0211] Among them, see Fig.18 The two magnetic poles of the second magnetic component 12 are arranged along the first direction X, and the direction of the magnetic flux lines inside the second magnetic component 12 is opposite to the direction of the magnetic flux lines inside the first magnetic component 11.

[0212] In this embodiment, one end of the fourth magnetic conductive member 24 close to the first magnetic conductive member 21 is connected to the first magnetic conductive member 21, and one end of the third magnetic conductive member 23 close to the first magnetic conductive member 21 is spaced apart from the first magnetic conductive member 21, resulting in a magnetic field distribution at the first end surface 11C of the first magnetic member 11 being different from the magnetic field distribution at the second end surface 11D of the first magnetic member 11, thereby causing different thrusts on the first voice coil 31 and the first magnetic block 41 during upward and downward movements, affecting the sound quality of the speaker 100.

[0213] By setting up a second magnetic component 12 and setting the direction of the magnetic flux lines inside the second magnetic component 12 to be opposite to the direction of the magnetic flux lines inside the first magnetic component 11, the magnetic field distribution at the first end surface 11C of the first magnetic component 11 can be corrected to make it the same as the magnetic field distribution at the second end surface 11D of the first magnetic component 11, thereby improving the sound quality of the speaker 100.

[0214] In some embodiments, the aforementioned magnetizing area U can also be set at a position where the upper and lower magnetic field distributions are asymmetric and the magnetic field strength is low, which is also beneficial for achieving the same thrust on the first voice coil 31 and the first magnetic block 41 during the upward and downward movements, thereby improving the sound quality of the speaker 100.

[0215] Fig.19 Another cross-sectional view of the loudspeaker 100 provided in an embodiment of the present application.

[0216] In some embodiments, Fig.19 As shown, the second side surface 11B of the first magnetic member 11 protrudes in a direction away from the first side surface 11A, so that near the center position of the second magnetic gap H2 (i.e., near the most protruding position of the first magnetic member 11 and near the displacement of 0 mm, for example Fig. 20The magnetic field gradient of the first magnetic block 41 at this position is negative, that is, the static magnetic force in the positive stroke is in the negative direction, that is, at this position, the direction of the static magnetic force on the first magnetic block 41 is opposite to the direction of the Lorentz magnetic force on the first voice coil 31, so that the first magnetic block 41 and the first voice coil 31 rigidly connected to the first magnetic block 41 are stabilized at the initial position - the position when no current is passed, so as to achieve the purpose of centering, thereby ensuring that the first magnetic block 41 and the first voice coil 31 are rigidly connected to the first magnetic block 41 at the initial position - the position when no current is passed, so as to achieve the purpose of centering, thereby ensuring that the first magnetic block 41 is stable at the initial position when no current is passed, and the first voice coil 3 ... Figure 5 Even when the centering effect is attenuated due to modulus attenuation under long-term stress and thermal fatigue of the folded ring 62, the first voice coil 31 in the loudspeaker 100 can be kept in the ideal initial position of the magnetic gap, ensuring that the first voice coil 31 reciprocates normally along the axis of the first voice coil 31 when subjected to stress, thereby ensuring the reliability of the loudspeaker 100.

[0217] Fig. 20 1 and 2 are analysis diagrams of displacement-static magnetoforce and displacement-negative stiffness of the loudspeaker 100 corresponding to the second side surface 11B of the first magnetic member 11 protruding in a direction away from the first side surface 11A.

[0218] See also Fig. 20 In the displacement range of -8mm to 8mm, the negative stiffness introduced by the first magnetic block 41 becomes a positive value, and the direction of the static magnetic force received by the first magnetic block 41 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, the stiffness of the loudspeaker 100 is enhanced, the force compensation for the first voice coil 31 at this position is reduced, and the tendency of the first voice coil 31 to move up and down at this position is slowed down, thereby making it easier for the first voice coil 31 and the first magnetic block 41 to be in an ideal initial position (that is, at a displacement of 0mm when not powered) to achieve centering.

[0219] 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.

[0220] 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 first magnetic member, wherein two magnetic poles of the first magnetic member are arranged along a first direction; The first magnetic member has a first side surface and a second side surface that are oppositely disposed, and at least one of the first side surface and the second side surface is parallel to the first direction; A first magnetic conductive member is disposed on one side of the first side surface of the first magnetic member; the first magnetic conductive member is spaced apart from the first side surface to form at least a portion of a first magnetic gap with the first magnetic member; A second magnetic conductive member is disposed on one side of the second side surface of the first magnetic member; the second magnetic conductive member is spaced apart from the second side surface to form at least a portion of a second magnetic gap with the first magnetic member; a first voice coil, at least partially disposed within the first magnetic gap; The first magnetic block is disposed in the second magnetic gap; the first magnetic block is configured to vibrate synchronously with the first voice coil after current is passed through it.

2. The loudspeaker according to claim 1, characterized in that Also includes: a diaphragm, wherein the extension direction of the diaphragm intersects with the first direction; the diaphragm is disposed on one side of the first magnetic member and is spaced apart from the first magnetic member; A first frame and a second frame, the first voice coil is arranged on the first frame, the first magnetic block is arranged on the second frame; the first frame and the second frame are both connected to the diaphragm.

3. The loudspeaker according to claim 2, characterized in that Also includes: The basin frame has a concave receiving cavity; The elastic wave is arranged in the accommodating cavity, and one end of the elastic wave is connected to the inner wall of the accommodating cavity, and the other end of the elastic wave is connected to the first frame or the second frame.

4. The loudspeaker according to any one of claims 1 to 3, characterized in that: Also includes: The second magnetic block and the third magnetic block are arranged on both sides of the first voice coil along the first direction.

5. The loudspeaker according to any one of claims 1 to 4, characterized in that: The first magnetic member has a first end surface and a second end surface that are oppositely disposed, and the first end surface and the second end surface are perpendicular to 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 first magnetic conductive member is spaced apart from the first magnetic conductive member to form a part of the first magnetic gap, and a side surface of the third magnetic conductive member close to the second magnetic conductive member is spaced apart from the second magnetic conductive member to form a part of the second magnetic gap; The fourth magnetic conductive member is arranged on the second end surface.

6. The loudspeaker according to claim 5, characterized in that One end of the fourth magnetic conductive member close to the first magnetic conductive member is connected to the first magnetic conductive member; The speaker also includes: The second magnetic component is arranged on the surface of the third magnetic conductive component away from the first magnetic component, and is arranged at the end of the third magnetic conductive component close to the first magnetic conductive component; the two magnetic poles of the second magnetic component are arranged along the first direction, and the direction of the magnetic flux lines inside the second magnetic component is opposite to the direction of the magnetic flux lines inside the first magnetic component.

7. The loudspeaker according to claim 5, characterized in that One end of the fourth magnetic conductive member close to the first magnetic conductive member is spaced apart from the first magnetic conductive member to form another part of the first magnetic gap; The speaker also includes: a second voice coil, fixedly connected to the first voice coil, the second voice coil being configured to transmit a current in a direction opposite to that transmitted by the first voice coil; Wherein, at least a portion of the first voice coil is disposed between the third magnetic conductive component and the first magnetic conductive component, and at least a portion of the second voice coil is disposed between the fourth magnetic conductive component and the first magnetic conductive component.

8. The loudspeaker according to any one of claims 5 to 7, characterized in that: The side surface of the fourth magnetic conductive member close to the second magnetic conductive member is spaced apart from the second magnetic conductive member to form another part of the second magnetic gap.

9. The loudspeaker according to any one of claims 1 to 8, characterized in that: The second side surface of the first magnetic member is concave in a direction approaching the first side surface, or is convex in a direction away from the first side surface.

10. The loudspeaker according to any one of claims 1 to 9, characterized in that: The first magnetic block is magnetic or magnetically conductive.

11. The loudspeaker according to any one of claims 1 to 10, characterized in that: At least one of the first magnetic conductive member and the second magnetic conductive member has a magnetized area; and / or, In the case where the speaker includes at least one of the second magnetic block, the third magnetic block, the third magnetic conductive member and the fourth magnetic conductive member, at least one of the second magnetic block, the third magnetic block, the third magnetic conductive member and the fourth magnetic conductive member has a magnetized area; The direction of the magnetic flux lines inside the magnetizing region is the same as the direction of the magnetic flux lines of the first magnetic member at the magnetizing region.

12. The loudspeaker according to any one of claims 1 to 11, characterized in that: The first magnetic member is disposed around the first magnetic conductive member, and the second magnetic conductive member is disposed around the first magnetic member; or, The first magnetic component is disposed around the second magnetic conductive component, and the first magnetic conductive component is disposed around the first magnetic component.

13. An electronic device, characterized in that: include: case; The speaker according to any one of claims 1 to 12, wherein the speaker is disposed inside the housing.

Images