Loudspeaker and electronic equipment

Abstract

The invention provides a loudspeaker and electronic equipment, the loudspeaker comprises a fixed support, a driving assembly and two vibrating pieces arranged at intervals in a first direction, the two vibrating pieces are installed on the fixed support, and the driving assembly is arranged between the two vibrating pieces. The two vibrating pieces can be driven by the driving assembly to vibrate in the same or opposite directions in the first direction relative to the fixing support. The driving assembly comprises a voice coil, the voice coil is arranged between the two vibration pieces in the first direction and connected with the two vibration pieces, and the voice coil can vibrate relative to the fixed support in the first direction and can drive the two vibration pieces to vibrate. The loudspeaker provided by the invention can realize larger amplitude in the electronic equipment, and has higher efficiency.

Description

Technical Field

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

[0002] A loudspeaker is an electronic device that converts electrical signals into sound signals, including single-sided speakers and back-to-back speakers. All types of speakers include a voice coil, a vibrator, and a magnetic circuit assembly. The magnetic circuit assembly can generate a magnetic field to provide driving force for the voice coil, driving the voice coil to vibrate up and down. The vibrator is connected to the voice coil and can vibrate under the drive of the voice coil, pushing the surrounding air to generate sound waves. A single-sided speaker refers to a speaker with a vibrator only on one side of the voice coil. Usually, a single voice coil drives a single vibrator to vibrate and produce sound. Back-to-back speakers are speakers in which two vibrators are stacked in the speaker, and the two vibrators can vibrate in the same direction or in opposite directions. When the two vibrators vibrate in opposite directions, the sound waves generated by each vibrator can be superimposed to obtain a higher sound pressure level. When the two vibrators vibrate in the same direction, a directional sound field (such as a dipole-shaped sound field) can be obtained, which has broad application prospects.

[0003] Traditional back-to-back speakers adopt a symmetrical design, with two voice coils set between two vibrating parts, and the two voice coils drive one vibrating part to vibrate. With such a structure, the voice coils take up a large space, and each of the two voice coils requires a magnetic circuit component to drive it. This back-to-back speaker can be regarded as two single-sided speakers stacked together, and its thickness is nearly twice that of a single-sided speaker. In an era when electronic devices are pursuing thinness, the thickness of electronic devices is limited, and speakers also need to adapt to the demand for thinness.

[0004] When designing the size of a back-to-back speaker, it is necessary to consider the avoidance space between the voice coils, the vibration space of the voice coil in the magnetic circuit assembly, the avoidance between the vibrator and the structural parts of the electronic device, etc. It is difficult to achieve balance within the limited thickness space, and the vibration space of the vibrator is also relatively cramped, resulting in limited amplitude. In order to reserve enough vibration space for the vibrator, it is necessary to consider reducing the thickness of the magnetic circuit assembly. However, reducing the thickness of the magnetic circuit assembly will limit the vibration stroke of the voice coil. The amplitude of the vibrator is positively correlated with the vibration stroke of the voice coil. In addition, the magnetic force of the magnetic circuit assembly will be reduced after the size is reduced, resulting in insufficient driving force. Therefore, it is difficult to increase the amplitude of the vibrator by reducing the thickness of the magnetic circuit assembly. On the other hand, this back-to-back speaker that drives two vibrators through two voice coils is equivalent to superimposing two single-sided speakers. Its electrical power is twice that of a single-sided speaker, but the efficiency (the ratio of the speaker output sound power to the input electrical power, or it can be understood that when the input electrical power is the same, the greater the output sound pressure level, the higher the efficiency, and the smaller the output sound pressure level, the lower the efficiency) has not been improved, or the efficiency is low.

[0005] Therefore, in the prior art, the back-to-back speakers are limited in space in electronic devices, and the vibration member is difficult to achieve a large amplitude and has low efficiency. Summary of the invention

[0006] The loudspeaker and electronic device provided in the embodiments of the present application solve the problems in the prior art that back-to-back loudspeakers are limited in space in electronic devices, the vibration parts have difficulty in achieving large amplitudes, and the efficiency is low.

[0007] An embodiment of the present application provides a speaker, including a fixed bracket, a driving assembly, and two vibration members spaced apart in a first direction, wherein the two vibration members are mounted on the fixed bracket, and the driving assembly is disposed between the two vibration members. Driven by the driving assembly, the two vibration members can vibrate in the same or opposite directions relative to the fixed bracket in the first direction.

[0008] The driving component includes a voice coil, which is arranged between two vibrators in a first direction and connected to the two vibrators respectively. The voice coil can vibrate relative to the fixed bracket along the first direction and can drive the two vibrators to vibrate.

[0009] The loudspeaker provided in the embodiment of the present application has a driving component arranged between two vibrating members, and the driving component includes a voice coil, and the voice coil is connected to the two vibrating members at the same time, and the two vibrating members can be driven to vibrate at the same time through a single voice coil. Correspondingly, only one magnetic circuit component can be arranged in the loudspeaker to drive the voice coil to vibrate. The first direction can be understood as the thickness direction of the loudspeaker (generally consistent with the thickness direction of the electronic device). Only one voice coil and a corresponding magnetic circuit component are arranged in the first direction, which saves the thickness dimension of a voice coil and a magnetic circuit component. When the thickness space of the electronic device is certain, more vibration space can be reserved for the vibrating member, and the amplitude of the vibrating member can be larger. In addition, the magnetic circuit component is less restricted in the thickness direction of the loudspeaker, and only one voice coil needs to be driven. The design is more flexible, and sufficient driving force and movement space can be provided for the voice coil, so that the vibration stroke of the voice coil can be increased, and the vibrating member can also obtain a larger amplitude under the drive of the voice coil. In addition, since the speaker of the present application drives two vibrating elements through a single voice coil, under the condition of the same input electrical power, the speaker provided in the embodiment of the present application can obtain nearly double the sound pressure level compared to a single-sided speaker, and the output sound power is significantly improved, which shows that it is more efficient.

[0010] Therefore, the speaker provided in the embodiment of the present application can achieve a larger amplitude in an electronic device and has higher efficiency.

[0011] In some embodiments, the driving assembly also includes two transmission assemblies, and the two transmission assemblies are arranged in a one-to-one correspondence with the two vibrators. The two transmission assemblies are respectively arranged on both sides of the voice coil in the first direction. The voice coil is respectively connected to the two vibrators through the two transmission assemblies and drives the two vibrators to vibrate.

[0012] By adopting the above scheme, the transmission assembly constitutes a connecting member between the voice coil and each vibrator, and the vibrator is connected to the voice coil through the transmission assembly. The setting of the transmission assembly can realize functions such as reversing the vibration direction of the voice coil, amplifying or reducing the amplitude of the voice coil, etc., so that the two vibrators can vibrate in the same direction or in opposite directions.

[0013] In some embodiments, each of the two transmission assemblies includes a transmission rod, the transmission rod has a fulcrum, a voice coil connection point and a vibration member connection point that are spaced apart, the voice coil connection point is connected to the voice coil, the vibration member connection point is connected to the corresponding vibration member, the transmission rod is rotatably connected to the fixed bracket through the fulcrum, and can rotate around the first axis, wherein the straight line where the fulcrum is located is parallel to or coincides with the first axis.

[0014] With the above solution, the transmission rod is a lever structure, and the transmission rod is rotatably connected to the fixed bracket through a fulcrum, so that when the transmission rod rotates around the first axis, the displacements of various points of the transmission rod itself are inconsistent. The voice coil connection point and the vibration member connection point are located at different positions of the transmission rod, and when the transmission rod rotates, the displacements of the voice coil connection point and the vibration member connection point are inconsistent, so that the amplitude and vibration direction of the voice coil can be changed by the rotation of the transmission rod and then transmitted to the vibration member.

[0015] In some embodiments, the distance from the connection point of the vibration member to the straight line where the fulcrum is located is greater than the distance from the connection point of the voice coil to the straight line where the fulcrum is located. When the vibration frequency of the voice coil is less than or equal to the first resonant frequency of the speaker, the amplitude of the connection point of the vibration member is greater than the amplitude of the connection point of the voice coil, and the amplitude of each vibration member is greater than the amplitude of the voice coil. That is, the transmission rod amplifies the amplitude of the connection point of the voice coil, so that the voice coil can apply a smaller vibration to the connection point of the voice coil, drive the connection point of the vibration member to form a larger amplitude vibration, and improve the sound output performance of the speaker.

[0016] In some embodiments, the transmission rod of each transmission assembly is configured as a same-direction lever or a reverse lever. In a same-direction lever, along the extension direction of the transmission rod, the connection point of the vibration member and the connection point of the voice coil are located on the same side of the fulcrum, the connection point of the vibration member and the connection point of the voice coil can rotate in the same direction around the first axis, and the vibration member connected to the same-direction lever and the voice coil vibrate in the same direction. In a reverse lever, along the extension direction of the transmission rod, the connection point of the vibration member and the connection point of the voice coil are located on both sides of the fulcrum, respectively, the connection point of the vibration member and the connection point of the voice coil can rotate in opposite directions around the first axis, and the vibration member connected to the reverse lever and the voice coil vibrate in opposite directions.

[0017] In some embodiments, in the two transmission assemblies of the driving assembly, the transmission rod of any one transmission assembly is set as a same-direction lever, and the transmission rod of the other transmission assembly is set as a reverse lever, and the two vibrators vibrate in opposite directions. The two vibrators vibrate in opposite directions, and the sound waves of each vibrator can be superimposed to obtain a greater sound pressure level.

[0018] In some embodiments, in the two transmission assemblies of the driving assembly, the transmission rods of each transmission assembly are configured as unidirectional levers or reverse levers, and the two vibrators vibrate in the same direction. The two vibrators vibrate in the same direction to obtain a directional sound field, such as a dipole-shaped sound field, which can be applied in scenarios where sound leakage prevention is required.

[0019] In some embodiments, each transmission component also includes a voice coil bracket and a vibration member bracket. The voice coil connection point of the transmission rod is connected to the voice coil through the voice coil bracket, and the vibration member connection point of the transmission rod is connected to the corresponding vibration member through the vibration member bracket; there is surface contact between the vibration member bracket and the corresponding vibration member.

[0020] By adopting the above scheme, a surface contact is formed between the vibration member bracket and the vibration member, which can increase the interaction area between the vibration member bracket and the vibration member, reduce the pressure of the vibration member bracket on the vibration member, and avoid the vibration member bracket from damaging the vibration member during rapid vibration. On the other hand, the vibration force of the vibration member connection point can be evenly applied to the vibration member through the vibration member bracket, so as to ensure the stability of the vibration member during vibration and reduce the distortion rate of the sound emitted by the vibration member.

[0021] In some embodiments, each transmission assembly further includes a rotating connection member, through which the fulcrum of the transmission rod is rotatably connected to the fixed bracket. The rotating connection member is configured as a hinge structure or a rotating shaft structure.

[0022] In some embodiments, the transmission rod of each transmission assembly is configured as a straight rod structure with an L-shaped, H-shaped, V-shaped or C-shaped cross section.

[0023] By adopting the above scheme, the rigidity and bending resistance of the transmission rod can be increased, and distortion of the transmission rod during transmission vibration can be avoided, that is, the ratio of the distance is greater than the ratio of the amplitude, so that the transmission capacity of the transmission rod is increased and the vibration effect of the vibrating part is guaranteed.

[0024] In some embodiments, each transmission component includes multiple transmission rods, and the multiple transmission rods are distributed symmetrically with respect to the voice coil, so that each vibrator can be subjected to force more evenly, avoiding resonance of the vibrator due to uneven force on the vibrator during vibration, resulting in distortion of the sound emitted by the vibrator.

[0025] In some embodiments, each transmission component also includes multiple vibration member brackets, and the multiple vibration member brackets are arranged in a one-to-one correspondence with each vibration member connection point in the multiple transmission rods. Each vibration member connection point in the multiple transmission rods is connected to the vibration member through the corresponding vibration member bracket, further increasing the force uniformity of the vibration member.

[0026] In some embodiments, a projection of the voice coil on each of the two vibrators along the first direction is located inside each vibrator.

[0027] In some embodiments, the loudspeaker includes only one driving assembly, the voice coil of the driving assembly is arranged in a ring shape, and the voice coil is not overlapped with the two vibrating members in the first direction. Alternatively, the loudspeaker includes multiple driving assemblies, the multiple vibrating assemblies are distributed in a plane perpendicular to the first direction, and the multiple driving assemblies are arranged around the periphery of the two vibrating members, and the voice coil of each driving assembly in the multiple driving assemblies is not overlapped with the two vibrating members in the first direction.

[0028] By adopting the above solution, it is difficult for the loudspeaker to collide with the transmission rod, and no avoidance gap needs to be reserved between the two, and no avoidance gap is required between the transmission rod and the voice coil, thereby further reducing the thickness of the loudspeaker.

[0029] In some embodiments, the line between the centers of the two vibrators is a first line, and the first line is parallel to the first direction. The speaker includes only one driving assembly, and the first line passes through the center of the driving assembly. It can be understood that the driving assembly is correspondingly arranged in the central area of ​​each vibrator in a plane perpendicular to the first direction to ensure that the force of each vibrator is balanced.

[0030] In some embodiments, the speaker includes a plurality of drive assemblies, and the plurality of drive assemblies are distributed in a plane perpendicular to the first direction. The line between the centers of the two vibrating members is a first line, the first line is parallel to the first direction, and the plurality of drive assemblies are distributed symmetrically around the first line. A plurality of drive assemblies are arranged between the two vibrating members to increase the force points of each vibrating member and provide sufficient driving force.

[0031] In some embodiments, the plurality of drive assemblies are two drive assemblies, the two drive assemblies are axially symmetrically distributed relative to the second axis, the second axis intersects the first connecting line and is perpendicular to the first connecting line. It can be understood that the two drive assemblies are not only centrally symmetrically distributed but also axially symmetrically distributed in a plane perpendicular to the first direction.

[0032] In some embodiments, the fixing bracket is arranged in a ring shape and is located outside the outer periphery of the voice coil.

[0033] By adopting the above scheme, the fixing bracket can not only play a supporting and protective role, but also serve as the shell of the speaker to prevent the voice coil from being squeezed and collided by external forces, and to prevent dust, water vapor, etc. from entering the interior of the speaker.

[0034] In some embodiments, the vibrating member includes a diaphragm and a dome, the outer periphery of the diaphragm is fixedly disposed on a fixing bracket, and the dome is fixedly disposed on the diaphragm so that the dome and the diaphragm vibrate. The voice coil is connected to the diaphragms or domes of the two vibrating members.

[0035] By adopting the above solution, the dome can be used to increase the weight of the vibrating member, and the frequency of the sound emitted by the vibrating member can be adjusted. The diaphragm is used to connect the dome to the fixed bracket.

[0036] In some embodiments, the speaker also includes a magnetic circuit assembly, which is mounted on a fixed bracket and is spaced between two vibrating members in a first direction. The voice coil is located in the magnetic field formed by the magnetic circuit assembly, and the magnetic circuit assembly provides driving force for the voice coil.

[0037] An embodiment of the present application also provides a speaker, including a fixed bracket, two vibrating members spaced apart in a first direction, and two voice coils arranged between the two vibrating members, each of the two vibrating members being mounted on the fixed bracket, the two voice coils corresponding to the two vibrating members one by one, and each voice coil being connected to a corresponding vibrating member.

[0038] The speaker also includes two transmission components corresponding to the two voice coils, and each voice coil is connected to a corresponding vibration member through a corresponding transmission component. Each voice coil can vibrate relative to the fixed bracket along a first direction, and can drive the corresponding vibration member to vibrate in the first direction through the corresponding transmission component.

[0039] Each transmission assembly includes a transmission rod, the transmission rod has a fulcrum, a voice coil connection point and a vibration member connection point which are spaced apart, the voice coil connection point is connected to the voice coil, the vibration member connection point is connected to the vibration member, the fulcrum is rotatably arranged on a fixed bracket, and the transmission rod rotates around a first axis, wherein the distance from the vibration member connection point to the straight line where the fulcrum is located is greater than the distance from the voice coil connection point to the straight line where the fulcrum is located.

[0040] By adopting the above scheme, both voice coils of the speaker drive the vibrator to vibrate through the transmission rod, and the distance from the connection point of the vibration part of the transmission rod to the straight line where the fulcrum is located is greater than the distance from the connection point of the voice coil to the straight line where the fulcrum is located, so that the vibration amplitude of the connection point of the vibration part is greater than the vibration amplitude of the connection point of the voice coil, so that the voice coil can apply a smaller amplitude to the connection point of the voice coil, driving the connection point of the vibration part to link the vibration part to form a vibration with a larger amplitude. Under the vibration of the voice coil with a smaller amplitude, the voice coil can drive the vibrator to vibrate with a larger amplitude through the transmission rod, thereby achieving the amplification effect of the voice coil amplitude (or it can be understood that the vibration amplitude of each voice coil is smaller than the vibration amplitude of the vibrator connected to it).

[0041] Compared to a speaker in which the vibration amplitude of the vibrating member is consistent with that of the voice coil, the speaker of the present application can have a smaller size in the first direction while ensuring that the maximum vibration amplitude of the vibrating member is the same, thereby reducing the space occupied by the speaker in the first direction and being easier to be set in a small space (such as an electronic device with a thinner thickness). Alternatively, compared to a speaker in which the vibration amplitude of the vibrating member is consistent with that of the voice coil, the speaker of the present application can have a larger maximum vibration amplitude of the vibrating member while maintaining the same size in the first direction, thereby improving the sound performance of the speaker. Furthermore, by adjusting the ratio of the amplitude of the vibrating member to the amplitude of the voice coil, the size of the speaker in the first direction can be further reduced while ensuring that the maximum vibration amplitude of the vibrating member is the same. Alternatively, while keeping the size of the speaker in the first direction unchanged, the maximum vibration amplitude of the vibrating member of the speaker can be further increased, thereby improving the sound performance of the speaker. Thus, the speaker of the present application can take into account both good sound quality and a smaller size in the vibration direction, that is, the speaker can ensure sufficient loudness and low-frequency output capability under the premise of a small thickness.

[0042] In some embodiments, the two voice coils of the speaker are arranged along a second direction, the second direction being perpendicular to the first direction. The two voice coils are not overlapped in the first direction, and the two voice coils are at least partially overlapped in the second direction.

[0043] By adopting the above solution, the two voice coils are staggered in the second direction and can be located at the same height in the first direction, which can further reduce the size of the speaker in the first direction.

[0044] The embodiment of the present application also provides an electronic device, including the speaker provided by any of the above embodiments. The speaker in the electronic device provided by the embodiment of the present application is less restricted by space, can achieve a larger amplitude, and has higher efficiency, and the audio output performance of the electronic device is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic diagram of the structure of the first type of speaker;

[0046] Figure 2a-2c is a schematic diagram of the vibration process of the first type of speaker, where: Figure 2a is the schematic diagram of the first speaker in the first state, Figure 2b This is the schematic diagram of the first type of speaker in the initial state. Figure 2c is a schematic diagram of the first loudspeaker in the second state;

[0047] Figure 3 is a schematic diagram of the structure of the second speaker;

[0048] Figure 4a-4c is a schematic diagram of the vibration process of the second speaker, where: Figure 4a is the schematic diagram of the second speaker in the first state, Figure 4b is the schematic diagram of the second speaker in the initial state. Figure 4c is a schematic diagram of the second loudspeaker in the second state;

[0049] Figure 5a-5d A comparison chart of the first loudspeaker and the second loudspeaker;

[0050] Figure 6 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present application;

[0051] Figure 7 This is a schematic diagram of the principle structure of the speaker according to the embodiment of the present application;

[0052] Figure 8a-8c This is a schematic diagram of the vibration process of the speaker in the embodiment of the present application, wherein: Figure 8a This is a schematic diagram of the speaker in the first state according to an embodiment of the present application. Figure 8b This is a schematic diagram of the speaker in the initial state of the embodiment of the present application. Figure 8c This is a schematic diagram of the speaker in the second state according to an embodiment of the present application;

[0053] Figure 8d-Figure 8h This is a schematic diagram of the structure of a magnetic circuit assembly in a speaker according to an embodiment of the present application;

[0054] Figure 9a-9d A comparison diagram of the speaker of the embodiment of the present application and the first speaker;

[0055] Figure 10a-Figure 10d A comparison diagram of the speaker of the embodiment of the present application and the second speaker;

[0056] Figure 11a-Figure 11b This is a schematic diagram of the transmission rod in the speaker of the embodiment of the present application, wherein: Fig.11a The transmission rod in is a same direction lever. Fig.11b The transmission rod in is a reverse lever;

[0057] Figure 12a-12c This is a schematic diagram of the vibration process of the first implementation mode of the driving component in the speaker of the embodiment of the present application;

[0058] Fig.13 This is a schematic diagram of a second implementation of a driving component in a loudspeaker according to an embodiment of the present application;

[0059] Fig.14a This is a schematic diagram of the principle structure in which a vibrating member and a voice coil in a speaker according to an embodiment of the present application are connected via gears;

[0060] Fig.14b This is a schematic diagram of the principle structure of the speaker in the embodiment of the present application where the vibrating element and the voice coil are connected via a rotating wheel;

[0061] Figure 15a-Figure 16 This is a schematic diagram of the structure of the first implementation mode of the speaker of the present application, wherein: Fig.15a A schematic diagram of the three-dimensional structure of the speaker fixing bracket. Fig.15b for Fig.15a Front view of Fig.15c for Fig.15a The left view of Fig.16 for Fig.15a Exploded diagram of

[0062] Fig.17 This is a structural schematic diagram of a first implementation mode of a transmission assembly in a driving assembly of a loudspeaker according to an embodiment of the present application;

[0063] Figure 18a-18b This is a structural schematic diagram of a second implementation mode of a transmission assembly in a driving assembly of a loudspeaker according to an embodiment of the present application;

[0064] Fig.19 for Fig.18a A schematic diagram of the connection between a transmission assembly and a voice coil, wherein the transmission rod of the transmission assembly is a reverse lever;

[0065] Fig. 20 for Fig.18a A schematic diagram of the structure of a transmission rod, wherein the transmission rod is a reverse lever;

[0066] Fig.21 for Fig.18a A schematic diagram of the connection between a transmission assembly and a voice coil, wherein the transmission rod of the transmission assembly is a unidirectional lever;

[0067] Fig. 22 for Fig.18a A schematic diagram of the structure of a transmission rod, wherein the transmission rod is a unidirectional lever;

[0068] Fig.23 This is a schematic diagram of the structure of the voice coil, the transmission rod and the vibration member in the speaker of the embodiment of the present application;

[0069] Fig.24a for Fig.18a A partial enlarged view of the R part;

[0070] Figure 24b for Fig.18a A partial enlarged view of the middle T part;

[0071] Fig.25 This is a schematic diagram of the connection structure of an implementation manner of a transmission rod and a voice coil in a driving assembly of a loudspeaker according to an embodiment of the present application;

[0072] Fig.26a for Fig.25 A partial enlarged view of the middle G part;

[0073] Figure 26b for Fig.25 A partial enlarged view of the middle J part;

[0074] Fig. 27 This is a schematic diagram of the principle of the second implementation mode of the loudspeaker according to the embodiment of the present application;

[0075] Figure 28-Figure 32 This is a schematic diagram of the structure of the second embodiment of the speaker of the present application, wherein: Fig.28 is a schematic diagram of the three-dimensional structure of the speaker. Fig.29a for Fig.28 Front view of the fixing bracket. Fig.29b for Fig.28 Go to the left view of the fixed bracket, Fig.30 for Fig.28 An exploded diagram of Fig.31 This is a schematic diagram of the three-dimensional structure of a speaker without a diaphragm. Fig.32 A schematic diagram of the three-dimensional structure of a loudspeaker without a diaphragm and a fixing bracket;

[0076] Fig.33 This is a schematic diagram of the principle structure of the third implementation mode of the speaker of the present application embodiment;

[0077] Fig.34a This is a schematic diagram of the cooperation between the driving assembly and the vibrating member in an implementation manner of a speaker according to an embodiment of the present application;

[0078] Fig.34b This is a schematic diagram of the cooperation between the driving assembly and the vibrating member in the third implementation mode of the loudspeaker according to the embodiment of the present application;

[0079] Fig.35 A schematic diagram of another loudspeaker according to an embodiment of the present application;

[0080] Fig.36 This is a schematic diagram of the structure of another speaker according to an embodiment of the present application.

[0081] Description of reference numerals:

[0082] The first option:

[0083] 100': Speaker;

[0084] 1': vibrating element; 2': voice coil;

[0085] 3': magnetic circuit assembly; 30': accommodation space; 31': magnet;

[0086] 32': first magnetic conductive plate; 33': second magnetic conductive plate; 34': third magnetic conductive plate;

[0087] 4': Connector;

[0088] Z': first direction; X': second direction.

[0089] Second option:

[0090] 100”: Speaker;

[0091] 1”: vibrating element; 21”: first voice coil; 22”: second voice coil;

[0092] 3”: magnetic circuit components; 30”: accommodation space;

[0093] 31”: center magnetic circuit; 311”: center magnet; 312”: first center magnetic conductive plate; 313”: second center magnetic conductive plate;

[0094] 32”: edge magnetic circuit; 321”: edge magnet; 322”: first edge magnetic conductive plate; 323”: second edge magnetic conductive plate;

[0095] Z”: first direction; X”: second direction.

[0096] This application:

[0097] 100: speaker;

[0098] 1: vibrating element; 11: diaphragm; 12: dome;

[0099] 2: driving assembly; 21: voice coil; 22: transmission assembly;

[0100] 221: transmission rod; 221a: fulcrum; 221b: voice coil connection point; 221c: vibration element connection point;

[0101] 2211: same direction lever; 2212: opposite direction lever;

[0102] 222: rotating connecting member; 2221: protrusion;

[0103] 2222: connecting block; 2222a: first part; 2222b: second part; 2223: fixing frame; 2224: connecting frame;

[0104] 223: vibration member bracket; 2231: connection block;

[0105] 224: voice coil support; 2241: convex block; 2242: connecting block; 2242a: first part; 2242b: second part;

[0106] 3: magnetic circuit assembly; 31: central magnetic circuit; 311: central magnet; 312: central magnetic plate;

[0107] 32: edge magnetic circuit; 321: edge magnet; 322: edge magnetic plate;

[0108] 4: Fixed bracket;

[0109] 5: Connecting piece; 511: Gear; 512: Rack;

[0110] 521: Wheel;

[0111] 51: Avoidance gap;

[0112] O1: first axis; O2: straight line where the fulcrum is located; O3: first connecting line; O4: second axis;

[0113] 200: Electronic equipment;

[0114] 61: display screen; 610: audio output hole; 62: housing;

[0115] Z: first direction; X: second direction; Y: third direction.

[0116] 300: speaker;

[0117] 71: Vibrating element; 72: Voice coil; 73: Fixed bracket

[0118] 8: transmission assembly; 81: transmission rod; 81a: fulcrum; 81b: voice coil connection point; 81c: vibration element connection point;

[0119] Q1: first direction; Q2: second direction. DETAILED DESCRIPTION

[0120] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, the following description will include many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0121] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0122] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0123] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0124] In the description of the present application, it should be understood that "electrical connection" in the present application can be understood as physical contact and electrical conduction between components; it can also be understood as a form in which different components in a circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals.

[0125] In the description of the present application, it should be noted that the mutual perpendicularity in the present application is not absolute perpendicularity, and the approximate perpendicularity caused by processing errors and assembly errors (for example, the angle between the two structural features is 89.9°) is also within the scope of mutual perpendicularity in the present application. The mutual parallelism in the present application is also not absolute parallelism, and the approximate parallelism caused by processing errors and assembly errors (for example, the angle between the two structural features is 0.1°) is also within the scope of mutual parallelism in the present application. The axisymmetry in the present application is not absolute axisymmetry, and the approximate axisymmetry caused by processing errors and assembly errors (for example, part of the structure is offset by a certain distance or angle relative to the axis of symmetry) is also within the scope of axisymmetry in the present application. The central symmetry in the present application is not absolute central symmetry, and the approximate central symmetry caused by processing errors and assembly errors (for example, part of the structure is offset by a certain distance or angle relative to the axis of symmetry) is also within the scope of central symmetry in the present application. This application does not make specific restrictions on this.

[0126] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0127] A speaker is an electronic device that converts electrical signals into sound signals. It is widely used in electronic devices that can produce sound, such as smartphones, headphones, tablets, laptops, and car-mounted equipment.

[0128] Speakers include single-sided speakers and back-to-back speakers. All types of speakers include voice coils, vibrators, and magnetic circuit components. The magnetic circuit components can generate a magnetic field to provide driving force for the voice coil, driving the voice coil to vibrate up and down. The vibrator is connected to the voice coil and can vibrate under the drive of the voice coil, pushing the surrounding air to generate sound waves.

[0129] A single-sided speaker is a speaker that has a vibrator only on one side of the voice coil, usually driven by a single voice coil to vibrate and produce sound. A back-to-back speaker is a speaker in which two vibrators are stacked in a layer, and the two vibrators can vibrate in the same direction or in opposite directions. When the two vibrators vibrate in opposite directions, the sound waves generated by each vibrator can be superimposed to obtain a higher sound pressure level. When the two vibrators vibrate in the same direction, a directional sound field (such as a dipole-shaped sound field) can be obtained, which has broad application prospects. However, back-to-back speakers are relatively thick and are subject to more restrictions in electronic devices. It is difficult for the vibrator to achieve a large amplitude and the efficiency is low. The following is a specific analysis based on the structures of several back-to-back speakers.

[0130] See also Figure 1-2c , Figure 1 is a schematic diagram of the structure of the first type of speaker; Figure 2a-2c is a schematic diagram of the vibration process of the first type of speaker, where: Figure 2ais the schematic diagram of the first speaker in the first state, Figure 2b This is the schematic diagram of the first type of speaker in the initial state. Figure 2c This is a schematic diagram of the first speaker in the second state.

[0131] like Figure 1-2c As shown, the speaker 100' includes two vibrating members 1' stacked in a first direction Z', and two voice coils 2' spaced apart between the two vibrating members 1'. The two voice coils 2' correspond to the two vibrating members 1' one by one, and each voice coil 2' is respectively connected to a corresponding vibrating member 1'. The speaker 100' also includes two magnetic circuit components 3' stacked in the first direction Z', each magnetic circuit component 3' is provided with a receiving space 30', and the two voice coils 2' move in the receiving spaces 30' of the two magnetic circuit components 3' respectively. The first direction Z' can be understood as the thickness direction of the speaker 100'. If the speaker 100' is installed in an electronic device, the first direction Z' is usually consistent with the thickness direction of the electronic device.

[0132] When the loudspeaker 100' is working, the two voice coils 2' vibrate along the first direction Z'. Figure 1-2c The vibrator 1' vibrates up and down in the viewing angle, and drives the corresponding vibrator 1' to vibrate along the first direction Z', that is, the vibrator 1' vibrates in the thickness direction of the electronic device. If the thickness space of the electronic device is small, the vibration amplitude of the vibrator 1' (the maximum displacement of an object from the equilibrium position during the vibration process) is large, and the vibrator 1' may collide with the internal structural parts of the electronic device, causing the speaker 100' to fail to work normally. Therefore, the amplitude of the vibrator 1' needs to be controlled within a reasonable range. Since the vibrator 1' vibrates driven by the voice coil 2', the amplitude of the vibrator 1' can also be measured by the amplitude of the voice coil 2'.

[0133] The voice coil 2' can be connected to the vibrator 1' through the connector 4'. The connector 4' can rigidly connect the voice coil 2' and the vibrator 1', so that the vibration direction and amplitude of each vibrator 1' are consistent with the corresponding voice coil 2'. The connector 4' can also flexibly connect the voice coil 2' and the vibrator 1'. The amplitude of the voice coil 2' is amplified, reduced or reversed according to a certain ratio through the connector 4' and then transmitted to the corresponding vibrator 1', so that the vibration directions of the vibrator 1' and the voice coil 2' are the same or opposite, and the amplitude of the vibrator 1' can be greater than or less than the amplitude of the voice coil 2', etc. The structure of the connector 4' will not be elaborated here. In general, the amplitude of the vibrator 1' is affected by two aspects: the amplitude of the voice coil 2' and the structure of the connector 4'. Ignoring the structure of the connecting member 4', the amplitude of the vibrator 1' is positively correlated with the amplitude of the voice coil 2'. The larger the amplitude of the voice coil 2', the larger the amplitude of the vibrator 1' can be. The following analysis measures the amplitude of the vibrator 1' by the amplitude of the voice coil 2'.

[0134] Each magnetic circuit component 3' of the loudspeaker 100' includes a magnet 31', a first magnetic conductive plate 32' and a second magnetic conductive plate 33'. The first magnetic conductive plate 32' is connected to the magnet 31' and covers the side of the magnet 31' away from another magnetic circuit component 3'. The second magnetic conductive plate 33' is spaced apart from the magnet 31' in the second direction X', and the second direction X' is perpendicular to the first direction Z'. A third magnetic conductive plate 34' is further arranged between the magnets 31' of two adjacent magnetic circuit components 3', so that the magnets 31' of the two magnetic circuit components 3' and the third magnetic conductive plates 34' form a sandwich structure. Among them, the first magnetic conductive plate 32', the second magnetic conductive plate 33' and the third magnetic conductive plate 34' can all guide the magnetic field direction of the magnet 31', so that the magnetic field formed by each magnetic circuit assembly 3' can cover the gap between each magnet 31' and the second magnetic conductive plate 33', the gap between the first magnetic conductive plate 32' and the second magnetic conductive plate 33', and the gap between the third magnetic conductive plate 34' and the second magnetic conductive plate 33', and each voice coil 2' always moves in the magnetic field when vibrating. Or it can be understood that each voice coil 2' moves in the corresponding accommodation space 30', and the accommodation space 30' includes: the gap between the magnet 31' and the second magnetic conductive plate 33' of the magnetic circuit assembly 3', the gap between the first magnetic conductive plate 32' and the second magnetic conductive plate 33', and the gap between the third magnetic conductive plate 34' and the second magnetic conductive plate 33'. The length of the accommodation space 30' in the first direction Z' directly determines the movement range of each voice coil 2', that is, directly determines the amplitude of the voice coil 2', and further affects the amplitude of the vibration member 1'.

[0135] In order to more intuitively compare the amplitude of the voice coil of the speaker 100' and various speakers mentioned later, the thickness of the magnetic circuit component 3' of the speaker 100' is set to D1. The two vibrators 1' can vibrate in the same direction or in opposite directions, and the two voice coils 2' can vibrate in the same direction or in opposite directions. Taking the case where the voice coils 2' vibrate in opposite directions and the vibration direction of each vibrator 1' is the same as that of the corresponding voice coil 2' as an example, the speaker 100' has an initial state ( Figure 2b The state shown), the first state ( Figure 2a state shown) and the second state ( Figure 2cThe state shown). When the loudspeaker 100' is in the first state, the two voice coils 2' move toward each other to the extreme position, and the distance between the two voice coils 2' is the shortest. At this time, the distance between the two voice coils 2' is the avoidance distance s1 reserved to prevent the voice coils 2' from colliding with each other. When the loudspeaker 100' is in the second state, the two voice coils 2' move away from each other to the extreme position, which can be approximately regarded as the position where the bottom of each voice coil 2' is flush with the boundary of the first magnetic conductive plate 32', and the voice coil 2' just does not leave the magnetic field at this point. When the loudspeaker 100' is in the initial state, the voice coil 2' is in a balanced position between the two extreme positions. In the process of the loudspeaker 100' switching from the first state to the second state, the displacement of each voice coil 2' between the two extreme positions is x1=1 / 2(D1-s1), and the amplitude of the voice coil 2' is A1=1 / 2x1=1 / 4(D1-s1). The distance between the end of each vibration member 1 ′ away from the magnetic circuit assembly 3 ′ and the magnetic circuit assembly 3 ′ in the second state is recorded as L1 , and the total thickness of the loudspeaker 100 ′ in the second state is H1 = D1 + 2L1 .

[0136] The loudspeaker 100' can be regarded as two single-sided loudspeakers 100' stacked together, that is, Figure 1-2c The speaker 100' in the figure can be regarded as two single-sided speakers 100' stacked up and down. Each single-sided speaker 100' includes a voice coil 2', a vibrating element 1' and a magnetic circuit component 3'. The thickness of the magnetic circuit component 3' of a single-sided speaker 100' is approximately 1 / 2D1. It can be seen intuitively that when the D1 value is constant, the size of the speaker 100' in each state is twice that of the single-sided speaker 100'. In an era where electronic devices pursue thinness and lightness, the thickness of electronic devices is limited, and the speaker 100' also needs to adapt to the thinness and lightness requirements. When designing the size of the loudspeaker 100', it is necessary to consider the avoidance distance s1 between the voice coils 2' and 2', the vibration space of the voice coil 2' in the magnetic circuit assembly 3' (i.e., the length of the accommodating space 30' in the first direction Z' shall not be less than the displacement x1 of the voice coil 2' between the two extreme positions), the avoidance between the vibrator 1' and the structural parts of the electronic device (i.e., the total thickness H1 of the loudspeaker 100' in the second state shall not be less than the thickness of the installation space in the electronic device), etc. It is difficult to achieve balance in a limited thickness space, and the vibration space of the vibrator 1 is also relatively cramped, resulting in limited amplitude. In order to reserve enough vibration space for the vibrator 1', it is necessary to consider reducing the thickness of the magnetic circuit assembly 3', that is, reducing D1. However, the reduction in the thickness of the magnetic circuit assembly 3' will limit the amplitude of the voice coil 2', that is, the reduction in D1 leads to a reduction in A1, and the amplitude of the vibrator 1' is positively correlated with the amplitude A1 of the voice coil 2'. In addition, after the size of the magnetic circuit assembly 3' is reduced, its magnetic force will be reduced, resulting in insufficient driving force. Therefore, it is difficult to increase the amplitude of the vibrator 1 ′ by reducing the thickness of the magnetic circuit.

[0137] On the other hand, the speaker 100' that drives two vibration members 1' respectively through two voice coils 2' is equivalent to superimposing two single-sided speakers. Its input power is twice that of a single-sided speaker, but the efficiency (the ratio of the speaker's output sound power to the input power, the output sound power can be measured by the output sound pressure level) is not improved. For example, assuming that the speaker 100' is disassembled into two single-sided speakers, the thickness of the magnetic circuit component 3' of a single-sided speaker is half of the total thickness of the magnetic circuit component 3' of the speaker 100', that is, 1 / 2D1. The input power of the single-sided speaker is P, the output sound pressure level is N, and the power input to the speaker 100' is 2P. Under ideal conditions, its output sound pressure level is also twice that of a single-sided speaker, 2N. Then the ratio of the sound power output of the speaker 100' to the input power is the same as the ratio of the sound power output of a single-sided speaker to the input power. It can be seen that the efficiency of the speaker 100' has not been improved compared with the single-sided speaker, or the efficiency is low.

[0138] Therefore, the back-to-back speaker is limited in space in the electronic device, and the vibration element 1' is difficult to achieve a large amplitude and has low efficiency.

[0139] See also Figure 3-Figure 5d , Figure 3 is a schematic diagram of the structure of the second speaker; Figure 4a-4c is a schematic diagram of the vibration process of the second speaker, where: Figure 4a is the schematic diagram of the second speaker in the first state, Figure 4b is the schematic diagram of the second speaker in the initial state. Figure 4c is a schematic diagram of the second loudspeaker in the second state; Figure 5a-5d The figure is a comparison between the first speaker and the second speaker.

[0140] like Figure 3-4c As shown, the loudspeaker 100" includes two vibrators 1" stacked in a first direction Z" and two voice coils disposed between the two vibrators 1", the two voice coils correspond to the two vibrators 1" one by one, and each voice coil is connected to a corresponding vibrator 1". Figure 1-2c The difference between the speaker 100' shown in the figure is that the two voice coils of the speaker 100" adopt a nested structure. The two voice coils are nested in the second direction X", the inner voice coil is the first voice coil 21", and the outer voice coil is the second voice coil 22", and the first voice coil 21" and the second voice coil 22" can be stacked in the second direction X" during vibration. With this structure, the two voice coils can share a magnetic circuit assembly 3".

[0141] More specifically, the magnetic circuit assembly 3" includes a central magnet 311" and an edge magnet 321" arranged at intervals in the second direction X". A central magnetic conductive plate is arranged on both sides of the central magnet 311" in the first direction Z", which are respectively the first central magnetic conductive plate 31"2 and the second central magnetic conductive plate 313". Among them, the first central magnetic conductive plate 312" is located between the vibration member 1" connected to the first voice coil 21" and the second central magnetic conductive plate 313" in the first direction Z". Edge magnetic conductive plates are arranged on both sides of the edge magnet 321" in the first direction Z", which are respectively the first edge magnetic conductive plate 322" and the second edge magnetic conductive plate 323". Among them, the second edge magnetic conductive plate 323" is located between the vibration member 1" connected to the second voice coil 22" and the first edge magnetic conductive plate 322" in the first direction Z". The center magnet 311", the first center magnetic conductive plate 312", and the second center magnetic conductive plate 313" constitute a center magnetic circuit 31", and the edge magnet 321", the first edge magnetic conductive plate 322", and the second edge magnetic conductive plate 323" constitute an edge magnetic circuit 32", and there is a receiving space 30" between the center magnetic circuit 31" and the edge magnetic circuit 32", and the first voice coil 21" and the second voice coil 22" both move in the receiving space 30". In order to form a magnetic field suitable for this structure, the second center magnetic conductive plate 313" needs to protrude from the outer peripheral side of the center magnet 311" in the second direction X", and the first edge magnetic conductive plate 322" also needs to protrude from the outer peripheral side of the edge magnet 321" in the second direction X".

[0142] The thickness of the center magnetic circuit 31" and the edge magnetic circuit 32" are both denoted as D2, and the thickness of each magnetic conductive plate is denoted as n2. The center magnetic circuit 31" and the edge magnetic circuit 32" are completely aligned in the second direction X" (in fact, the thickness of the center magnetic circuit 31" and the edge magnetic circuit 32" are not the same, the thickness of each magnetic conductive plate is not necessarily the same, and the center magnetic circuit 31" and the edge magnetic circuit 32" are not necessarily completely aligned. This is simplified for the convenience of calculation). The overall thickness of the magnetic circuit of the speaker 100" is also D2.

[0143] The two vibrators 1" can vibrate in the same direction or in opposite directions, and the two voice coils can vibrate in the same direction or in opposite directions. Taking the case where the voice coils vibrate in opposite directions and the vibration direction of each vibrator 1" is the same as that of the corresponding voice coil as an example, the speaker 100" has an initial state ( Figure 4b The state shown), the first state ( Figure 4a state shown) and the second state ( Figure 4cThe state shown). When the loudspeaker 100" is in the first state, the two voice coils move toward each other to the extreme position. At this time, in order to avoid the collision between the voice coils and the magnetic conductive plate, an avoidance gap is reserved between the first voice coil 21 and the second center magnetic conductive plate 313", and an avoidance gap is reserved between the second voice coil 22" and the first edge magnetic conductive plate 322". For the convenience of calculation, it is assumed that the avoidance distance between each voice coil and the magnetic conductive plate is s2. When the loudspeaker 100" is in the second state, the two voice coils move away from each other to the extreme position, which can be approximately regarded as the bottom of each voice coil is flush with the boundary of the magnetic circuit assembly 3", and the voice coil will just not leave the magnetic field here. When the loudspeaker 100" is in the initial state, each voice coil is in a balanced position between two extreme positions. In the process of the loudspeaker 100" converting from the first state to the second state, the displacement of each voice coil between the two extreme positions is x2, x2=D2-n2-s2, and the amplitude of each voice coil is A2, A2=1 / 2x1=1 / 2(D2-n2-s2). In the second state, the distance between the end of each vibrator 1" away from the magnetic circuit assembly 3" and the magnetic circuit assembly 3" is denoted as L2, and the total thickness of the loudspeaker 100" in the second state is H2=D2+2L2.

[0144] It can be understood that the total thickness of the speaker 100" in the second state is the maximum thickness of the speaker 100". Figure 5a-5d As shown, the speaker 100" is compared with the speaker 100'. If the thickness of the electronic device is constant, assuming that the total thickness of the two speakers in the second state is the same, H1 = H2, and the total thickness of the magnetic circuit components is the same, D1 = D2 (it is also necessary to obtain L1 = L2). The dotted line indicates the position of the bottom of the second voice coil 22" of the speaker 100" in the first state and the second state (the amplitudes of the two voice coils in the speaker 100" and the speaker 100' are the same, only one of the voice coils is used for comparison here). It can be seen intuitively from the figure that the displacement x2 of the voice coil of the speaker 100" between the two extreme positions is greater than the displacement x1 of the voice coil of the speaker 100' between the two extreme positions, that is, x2>x1. Obviously, A2>A1. When the thickness of the electronic device is constant, the vibration member 1 of the speaker 100" can also have a larger amplitude than the vibration member of the speaker 100'.

[0145] However, although the loudspeaker 100" can increase the amplitude of the vibrator 1" to a certain extent, the amplitude of the vibrator 1" is still affected by many factors. For example, there is a reserved avoidance distance between the bottom of each voice coil and the magnetic plate, and the improvement effect is not obvious. Moreover, the efficiency of the loudspeaker 100" is not improved. Specifically, the loudspeaker 100" drives two voice coils to move through a magnetic circuit component 3", and the magnetic field of a magnetic circuit component 3" needs to be distributed to the two voice coils. Comparing the loudspeaker 100' with a single-sided loudspeaker, it is assumed that the thickness of the magnetic circuit component of a single-sided loudspeaker is the same as the thickness of the magnetic circuit component 3" of the loudspeaker 100", both of which are D2. The input power to a single-sided loudspeaker is P, and the output sound pressure level is N. The same electric power P is input to each magnetic circuit component 3" in the loudspeaker 100", and the electric power distributed by the magnetic circuit component 3" to each voice coil is 1 / 2P. The sound pressure level output by each voice coil driving the vibrator 1" to vibrate is 1 / 2N. The total sound pressure level output by the loudspeaker 100" is N. The ratio of the sound power output of the loudspeaker 100" to the input electric power is the same as that of the single-sided loudspeaker. Compared with the single-sided loudspeaker, it can be seen that the efficiency of the loudspeaker 100" has not been improved compared with the single-sided loudspeaker, or the efficiency is lower.

[0146] Based on the structures of the above two types of speakers, it can be seen that back-to-back speakers are limited by space in electronic devices, it is difficult for the vibrating parts to achieve large amplitude, and the efficiency is low.

[0147] It can be understood by those skilled in the art that the vibration amplitude of the vibrating member in the speaker is one of the important parameters that affect the sound performance of the speaker. For the same vibrating member, when the vibration amplitude of the vibrating member is larger, the sound pressure level of the vibrating member when vibrating and emitting sound is larger, and the loudness of the sound is higher, so that people can hear the sound signal emitted by the speaker more clearly. Especially when the speaker outputs a low-frequency sound signal, because people are less sensitive to low-frequency sound signals, that is, when the speaker outputs a sound signal with the same sound pressure level, people's subjective perception of high-frequency sound signals will be louder and clearer than low-frequency sound signals, or it can be understood that compared with medium and high-frequency sound signals, low-frequency sound signals require a high sound pressure level in order to enable people to clearly distinguish low-frequency sound signals in subjective perception. For example, a sound signal with a sound pressure level of 10dB and a frequency of 200Hz is as loud as a sound signal with a sound pressure level of 50dB and a frequency of 40Hz in people's subjective perception. Therefore, the amplitude of the vibrating member affects the sound pressure level and low-frequency output capacity of the sound that can be output by the speaker, and also affects the loudness and ability of the speaker to output full-band sound. On the other hand, the efficiency of the speaker is also one of the important parameters to measure the performance of the speaker. For example, if the speaker is used in an electronic device, the efficiency of the speaker will affect the operating load and power consumption of the electronic device. Therefore, improving the amplitude and efficiency of the speaker has become an urgent problem to be solved.

[0148] In order to solve the above problems, the present application provides a loudspeaker that drives two vibrators to vibrate through a single voice coil, which can achieve a larger amplitude in an electronic device and has higher efficiency. The basic principle of the loudspeaker of the present application embodiment is described below in conjunction with the accompanying drawings.

[0149] The present application provides an electronic device, and the speaker provided in the present application can be applied to the electronic device. The electronic device includes but is not limited to mobile phones, tablet computers, laptop computers, headphones, speakers, televisions, large speakers and other terminals with audio output functions. The following is an example of the structure of the electronic device using a mobile phone as an example.

[0150] See also Figure 6 , Figure 6 It is a schematic diagram of the structure of an electronic device according to an embodiment of the present application.

[0151] like Figure 6 As shown, the electronic device 200 includes a housing 62 and a display screen 61, the display screen 61 is installed in the housing 62, and the housing 62 has an installation space, and the speaker 100 is installed in the accommodating space of the housing 62. Among them, the display screen 61 is used to display images, and can be a liquid crystal display (LCD), an organic light emitting diode (OLED) display screen, etc., which is not limited in this application. The housing 62 is used to support the display screen 61 and the electronic components inside the electronic device 200. The specific structure of the housing 62 is not limited, for example, it may include structures such as a middle frame and a back cover. The internal electronic components of the electronic device 200 may also include a PCB board, a battery, a camera, etc., which is not limited in this application.

[0152] In some embodiments, an audio output hole 610 is provided on the display screen 61 to facilitate the transmission of sound waves from the speaker 100. In one embodiment, in order to reduce the space occupied by the speaker 100 in the electronic device 200, the thickness direction of the speaker 100 is consistent with the thickness direction of the electronic device 200, both of which are the first direction Z. In other alternative embodiments, the thickness direction of the speaker 100 may also be inconsistent with the thickness direction of the electronic device 200, for example, the first direction Z of the speaker 100 may also be perpendicular to the thickness direction of the electronic device 200, etc., and this application is not limited to this.

[0153] See also Figure 7-10d , Figure 7 This is a schematic diagram of the principle structure of the speaker according to the embodiment of the present application; Figure 8a-8c This is a schematic diagram of the vibration process of the speaker in the embodiment of the present application, wherein: Figure 8a This is a schematic diagram of the speaker in the first state according to an embodiment of the present application. Figure 8bThis is a schematic diagram of the speaker in the initial state of the embodiment of the present application. Figure 8c This is a schematic diagram of the speaker in the second state according to an embodiment of the present application; Figure 8d-Figure 8h This is a schematic diagram of the structure of a magnetic circuit assembly in a speaker according to an embodiment of the present application; Figure 9a-9d A comparison diagram of the speaker of the embodiment of the present application and the first speaker; Figure 10a-Figure 10d This is a comparison diagram of the speaker of the embodiment of the present application and the second speaker.

[0154] like Figure 7-8h As shown, the speaker 100 includes a fixed bracket 4, a driving component 2 and two vibration members 1 spaced apart in a first direction Z. The two vibration members 1 are mounted on the fixed bracket 4, and the driving component 2 is disposed between the two vibration members 1. Driven by the driving component 2, the two vibration members 1 can vibrate in the same or opposite directions relative to the fixed bracket 4 in the first direction Z.

[0155] In some embodiments, the speaker 100 may further include a housing (not shown in the figure), which may be an independent housing of the speaker 100, or may be a housing 62 of the electronic device 200 reused as the housing of the speaker 100, which is not limited in the present application. The housing may be formed with a receiving space for accommodating components of the speaker 100. The housing may also serve to protect the speaker 100.

[0156] The fixing bracket 4 is the skeleton structure of the speaker 100, which is used to support and fix the various components of the speaker 100. The fixing bracket 4 and the housing of the speaker 100 can be two separately arranged components, or the fixing bracket 4 can be used as the housing of the speaker 100 to protect the internal components of the speaker 100, for example, the fixing bracket 4 can be designed in the form of a housing, etc., and this application does not limit this. It should be noted that the structure of the fixing bracket 4 is not limited, and will be described in detail later, and will not be expanded here.

[0157] Furthermore, the driving assembly 2 includes a voice coil 21, which is arranged between the two vibrators 1 in the first direction Z and is respectively connected to the two vibrators 1. The voice coil 21 can vibrate relative to the fixed bracket 4 along the first direction Z and can drive the two vibrators 1 to vibrate.

[0158] In one embodiment, the speaker 100 further includes a magnetic circuit component 3, which is mounted on a fixed bracket 4, and the magnetic circuit component 3 is spaced between two vibrating members 1 in the first direction Z, and the voice coil 21 is located in the magnetic field formed by the magnetic circuit component 3. The magnetic circuit component 3 can be composed of an electromagnet or a permanent magnet and form a stable magnetic field, and the voice coil 21 can be set as an electromagnet wound with a coil, and the voice coil 21 is located in the magnetic field formed by the magnetic circuit component 3. It can be understood that at least part of the structure of the voice coil 21 is located in the magnetic field formed by the magnetic circuit component 3. At this time, when the electrical signal of the sound passes through the coil in the voice coil 21, the voice coil 21 can form a magnetic field that repels or attracts the magnetic circuit component 3, so that it vibrates in the magnetic field formed by the magnetic circuit component 3, so that the voice coil 21 drives the vibrating member 1 to vibrate and make a sound, so as to convert the electrical signal into a sound signal.

[0159] The loudspeaker 100 provided in the embodiment of the present application has a driving component 2 disposed between two vibrating members 1. The driving component 2 includes a voice coil 21. The voice coil 21 is connected to the two vibrating members 1 at the same time. The two vibrating members 1 can be driven to vibrate at the same time through a single voice coil 21. Accordingly, only one magnetic circuit component 3 can be disposed in the loudspeaker 100 to drive the voice coil 21 to vibrate. The first direction Z can be understood as the thickness direction of the loudspeaker 100. When the loudspeaker 100 is installed in an electronic device 200, the first direction Z can be consistent with the thickness direction of the electronic device 200. Only one voice coil 21 and one corresponding magnetic circuit component 3 are disposed in the first direction Z, which saves the thickness dimension of one voice coil 21 and the magnetic circuit component 3. When the thickness space of the electronic device 200 is fixed, more vibration space can be reserved for the vibrating member 1, and the amplitude of the vibrating member 1 (the farthest distance from the equilibrium position when the vibrating member 1 vibrates) can be larger. Furthermore, the magnetic circuit assembly 3 is less restricted in the thickness direction of the loudspeaker 100, and only needs to drive one voice coil 21, so the design is more flexible and can provide sufficient driving force and movement space for the voice coil 21, thereby increasing the vibration stroke of the voice coil 21, and the vibrating member 1 can also obtain a larger amplitude driven by the voice coil 21. In addition, since the loudspeaker 100 of the present application drives two vibrating members 1 through a single voice coil 21, under the condition of the same input electrical power, the loudspeaker 100 provided in the embodiment of the present application can obtain nearly double the sound pressure level compared to a single-sided loudspeaker, and the output sound power is significantly improved, which shows that it has a higher efficiency.

[0160] In order to more intuitively reflect the advantages of the speaker 100 provided in the present application, the speaker 100 is compared with the speaker 100 ′ and the speaker 100 ″ respectively, and the specific analysis is as follows.

[0161] like Figure 8a-Figure 10dAs shown, in one embodiment, a connecting member 5 is provided between the two vibrators 1 and the voice coil 21, and the two vibrators 1 can vibrate in the same direction or in the opposite direction driven by the voice coil 21 and the connecting member 5. The specific structure of the connecting member 5 is not limited and will be described in detail later. Taking the opposite vibration of the two vibrators 1 as an example, the speaker 100 has an initial state ( Figure 8b The state shown), the first state ( Figure 8a , Figure 9a , Fig.10a state shown) and the second state ( Figure 8c , Figure 9b , Fig.10b When the speaker 100 is in the first state, the voice coil 21 is in the first position, and the two vibrators 1 move toward each other to the shortest distance. At this time, each vibrator 1 is close to the magnetic circuit assembly 3. To avoid collision between the vibrator 1 and the magnetic circuit assembly 3, a clearance gap 51 is reserved between each vibrator 1 and the magnetic circuit assembly 3. When the speaker 100 is in the second state, the voice coil 21 is in the second position, and the two vibrators 1 move away from each other to the farthest distance. When the speaker 100 is in the initial state, the voice coil 21 is in a balanced position between the two extreme positions.

[0162] In one embodiment, the first position and the second position of the voice coil 21 are both extreme positions. Specifically, when the voice coil 21 is in the first position, the bottom of the voice coil 21 is flush with the boundary of the lower end of the magnetic circuit assembly 3. It is sufficient for a part of the structure of the voice coil 21 to be in the magnetic field during the movement. The bottom of the voice coil 21 can also exceed the boundary of the lower end of the magnetic circuit assembly 3 in theory, but because the distance between the vibrator 1 and the magnetic circuit assembly 3 is the shortest in the first state, a certain avoidance distance needs to be reserved between the voice coil 21 and the lower vibrator 1. Here, the avoidance distance between the voice coil 21 and the vibrator 1 and the avoidance distance between the vibrator 1 and the magnetic circuit assembly 3 are considered to be approximately the same, so the bottom of the voice coil 21 is flush with the boundary of the lower end of the magnetic circuit assembly 3. When the speaker 100 is in the second state, the bottom of the voice coil 21 is flush with the boundary above the magnetic circuit assembly 3, and the voice coil 21 just does not leave the magnetic field here. The thickness of the magnetic circuit assembly 3 is recorded as D. During the process of the speaker 100 switching from the first state to the second state, the displacement of the voice coil 21 between the two extreme positions is recorded as x, x=D, and the amplitude of the voice coil 21 is A=1 / 2x=1 / 2D. In the second state, the distance between the end of each vibrator 1 away from the magnetic circuit assembly 3 and the magnetic circuit assembly 3 is recorded as L, and the total thickness of the speaker 100 in the second state is H=D+2L.

[0163] like Figure 9a-9bAs shown, it can be understood that the total thickness of the speaker 100 in the second state is the maximum thickness of the speaker 100. Comparing the speaker 100 with the speaker 100', if the thickness space of the electronic device is constant, it is assumed that the total thickness of the two speakers in the second state is the same, that is, H = H1, and the total thickness of the magnetic circuit components is the same, that is, D = D1 (it is also necessary to obtain L = L1). As mentioned above, the amplitude A = 1 / 2D of the voice coil 21 of the speaker 100, and the amplitude A1 = 1 / 4 (D1-s1) = 1 / 4 (D-s1) of the voice coil of the speaker 100', it is obvious that: A>A1. More intuitively, Figure 9a-9b The dotted line in FIG. 1 shows the position of the bottom of the voice coil 21 of the loudspeaker 100 in the first state and the second state. It can be seen that the displacement x between the two extreme positions of the loudspeaker 100 is greater than Fig.9c and Figure 9d The displacement x1 of the voice coil of the loudspeaker 100' between the two extreme positions is shown as x>x1. Obviously, A>A1, that is, the amplitude of the voice coil 21 of the loudspeaker 100 is greater than the amplitude of the voice coil of the loudspeaker 100'. Because the amplitude of the vibrator is positively correlated with the amplitude of the voice coil, it can be known that the amplitude of the vibrator 1 of the loudspeaker 100 can be greater than the amplitude of the vibrator 1 of the loudspeaker 100'. In the case of a certain thickness of the electronic device, if the maximum thickness of the two loudspeakers is the same (the thickness in the second state), the vibrator 1 of the loudspeaker 100 can have a larger amplitude than the vibrator 1' of the loudspeaker 100'. In other words, if the amplitudes of the vibrators of the two loudspeakers are consistent, the maximum thickness of the loudspeaker 100 can be smaller than the maximum thickness of the loudspeaker 100', and the loudspeaker 100 can be installed in an electronic device with a thinner thickness, that is, the electronic device has fewer restrictions on the loudspeaker 100.

[0164] like Figure 10a-Figure 10d As shown, the speaker 100 is compared with the speaker 100", if the thickness of the electronic device is constant, it is assumed that the total thickness of the two speakers in the second state is the same, that is, H = H2, and the total thickness of the magnetic circuit components is the same, that is, D = D2 (it is also necessary to get L = L2). As mentioned above, the amplitude A = 1 / 2D of the voice coil 21 of the speaker 100, and the amplitude A2 = 1 / 2(D2-n2-s2) = 1 / 2(D-n2-s2) of the voice coil of the speaker 100", obviously: A>A2. More intuitively, Figure 10a-Figure 10d The dotted line in the figure shows the position of the bottom of the voice coil of the speaker in the first state and the second state. It can be seen that Figure 10a-Figure 10b The displacement x of the loudspeaker 100 between the two extreme positions is greater than Figure 10c-10dThe displacement x2 of the voice coil of the loudspeaker 100″ between the two extreme positions is shown as x>x2. Obviously, A>A1, that is, the amplitude of the voice coil 21 of the loudspeaker 100 is greater than the amplitude of the voice coil of the loudspeaker 100″. Similarly, when the thickness of the electronic device is constant, if the maximum thickness of the two loudspeakers 100 is the same (the thickness in the second state), the vibration element 1 of the loudspeaker 100 can have a larger amplitude than the vibration element 1 of the loudspeaker 100. If the amplitudes of the vibration elements of the two loudspeakers are consistent, the maximum thickness of the loudspeaker 100 can be smaller than the maximum thickness of the loudspeaker 100″, and the loudspeaker 100 can be installed in an electronic device with a thinner thickness, that is, the electronic device has fewer restrictions on the loudspeaker 100.

[0165] In summary, the speaker provided in the present application is less restricted in electronic devices, and the vibration element can achieve a larger amplitude.

[0166] On the other hand, since the magnetic circuit component 3 of the loudspeaker 100 only provides driving force for one voice coil 21, it can drive the two vibrators 1 to vibrate and produce sound, so it has higher efficiency. Specifically, the loudspeaker 100 is compared with a single-sided loudspeaker. The thickness of the magnetic circuit component of the single-sided loudspeaker is the same as the thickness of the magnetic circuit component 3 of the loudspeaker 100, both of which are D. If the electric power input to the single-sided loudspeaker is P, the sound pressure level output is N. The electric power P of a single-sided loudspeaker is input to the loudspeaker 100, and the electric power P is all applied to one voice coil 21. One voice coil 21 drives two vibrators 1 to vibrate, and the sound pressure level output by each vibrator 1 is N. The total sound pressure level output by the loudspeaker 100 must be greater than N (for example, it can be 1.5N, 1.6N, 1.75N, 1.9N, etc.), and ideally it can even reach 2N. Then the ratio of the sound power output by the loudspeaker 100 to the input electric power is significantly improved, so the loudspeaker 100 provided in the present application has higher efficiency.

[0167] It will be understood by those skilled in the art that the magnetic circuit assembly 3 can be designed in various forms, and its specific structure is not limited. Figure 8a-8h As shown, in one embodiment, the magnetic circuit assembly 3 includes a center magnetic circuit 31 and an edge magnetic circuit 32 that are spaced apart. Both the center magnetic circuit 31 and the edge magnetic circuit 32 may include a magnet and a magnetic conductive plate. The magnetic conductive plate may guide the direction of the magnetic field. The voice coil moves in the gap between the center magnetic circuit 31 and the edge magnetic circuit 32.

[0168] like Figure 8a-8eAs shown, in one embodiment, the central magnetic circuit 31 includes two central magnets 311 spaced apart in the first direction Z, and a central magnetic conductive plate 312 disposed between the two central magnets 311, and the central magnetic conductive plate 312 is fixedly connected to each central magnet 311. The edge magnetic circuit 32 includes two edge magnets 321 spaced apart in the first direction Z, and an edge magnetic conductive plate 322 disposed between the two edge magnets 321, and the edge magnetic conductive plate 322 is fixedly connected to each edge magnet 321. When the speaker is in the initial state, the voice coil is aligned with the central magnetic conductive plate 312 at the middle position in the first direction Z.

[0169] like Figure 8f As shown, in an alternative embodiment, the central magnetic circuit 31 includes two central magnetic conductive plates 312 spaced apart in the first direction Z, and a central magnet 311 disposed between the two central magnetic conductive plates 312, and the central magnet 311 is fixedly connected to each central magnetic conductive plate 312. The edge magnetic circuit 32 includes two edge magnetic conductive plates 322 spaced apart in the first direction Z, and an edge magnet 321 disposed between the two edge magnetic conductive plates 322, and the edge magnet 321 is fixedly connected to each edge magnetic conductive plate 322. When the speaker is in an initial state, the middle position of the voice coil in the first direction Z is aligned with any one of the central magnetic conductive plates 312. In one embodiment, the central magnetic circuit 31 may also include three central magnetic conductive plates 312 spaced apart in the first direction Z, and a central magnet 311 is disposed between two adjacent central magnetic conductive plates 312. The structure of the edge magnetic circuit 32 may correspond to that of the central magnetic circuit 31, and will not be repeated here.

[0170] It will be understood by those skilled in the art that the number of the central magnetic circuit 31 and the edge magnetic circuit 32 is not limited. Figure 8a-8e As shown, in one embodiment, the magnetic circuit assembly 3 includes a central magnetic circuit 31 and two edge magnetic circuits 32 spaced apart and arranged on both sides of the central magnetic circuit 31 in a direction perpendicular to the first direction Z. Figure 8g-Figure 8f As shown, in an alternative embodiment, two center magnetic circuits 31 may be provided in the speaker. The two center magnetic circuits 31 are arranged at intervals in a direction perpendicular to the first direction Z, and an edge magnetic circuit 32 is provided on each side of the two center magnetic circuits 31 .

[0171] It should be noted that Figure 8e-Figure 8h The direction of the arrow in represents the magnetization direction of the magnetic circuit component 3. In addition to the several structures exemplified above, the magnetic circuit component 3 can also be set to other structures, which will not be listed one by one in this application.

[0172] In other alternative embodiments, the magnetic circuit assembly 3 may also be configured as other structures. For example, the magnetic circuit assembly 3 may include a central portion and a side portion, a receiving space is formed between the central portion and the side portion, the voice coil 21 surrounds the central portion of the magnetic circuit assembly 3, and the side portion of the magnetic circuit assembly 3 surrounds the voice coil 21. Both the central portion and the side portion may include a magnet, and two magnetic conductive plates that clamp the magnet in the first direction Z, and a corresponding magnetic field is formed by the magnet and the magnetic conductive plates.

[0173] It can be understood by those skilled in the art that, by driving two vibrators 1 to vibrate in the same direction or in the opposite direction through a voice coil 21, the same direction vibration can be achieved by rigidly connecting each vibrator 1 to the voice coil 21, and the vibration direction and amplitude of each vibrator 1 are consistent with the voice coil 21. However, if the two vibrators 1 are to vibrate in the opposite direction, it is necessary to reverse the vibration direction of one of the vibrators 1 with the voice coil 21 through the connecting member 5 between the voice coil 21 and the vibrator 1, and to amplify or reduce the amplitude of the voice coil 21. The specific structure of the connecting member 5 is not limited, and the following example illustrates a possible connection structure between the voice coil 21 and the vibrator 1.

[0174] See also Figure 11a-Figure 13 , Figure 11a-Figure 11b This is a schematic diagram of the transmission rod in the speaker of the embodiment of the present application, wherein: Fig.11a The transmission rod in is a same direction lever. Fig.11b The transmission rod in is a reverse lever; Figure 12a-12c This is a schematic diagram of the vibration process of the first implementation mode of the driving component in the speaker of the embodiment of the present application; Fig.13 This is a schematic diagram of a second implementation of a driving component in a speaker according to an embodiment of the present application.

[0175] like Figure 7-Figure 13 As shown, in one embodiment, the driving assembly 2 further includes two transmission assemblies 22, and the two transmission assemblies 22 are arranged in a one-to-one correspondence with the two vibrators 1. The two transmission assemblies 22 are respectively arranged on both sides of the voice coil 21 in the first direction Z. The voice coil 21 is respectively connected to the two vibrators 1 through the two transmission assemblies 22, and drives the two vibrators 1 to vibrate. Or it can be understood that the transmission assembly 22 is the connecting member 5 between the voice coil 21 and each vibrator 1, and the vibrator 1 is connected to the voice coil 21 through the transmission assembly 22, and the transmission assembly 22 can realize the functions of reversing the vibration direction of the voice coil 21, amplifying or reducing the amplitude of the voice coil 21, etc.

[0176] It can be understood by those skilled in the art that the specific structure of the transmission assembly 22 is not limited. In one embodiment, the transmission assembly 22 includes a transmission rod 221, and the transmission rod 221 has a fulcrum 221a, a voice coil connection point 221b and a vibration member connection point 221c that are spaced apart. The voice coil connection point 221b is connected to the voice coil 21, and the vibration member connection point 221c is connected to the corresponding vibration member 1. The transmission rod 221 is rotatably connected to the fixed bracket 4 through the fulcrum 221a and can rotate around the first axis O1. The straight line O2 where the fulcrum is located is parallel to or coincides with the first axis O1.

[0177] Or it can be understood that the transmission rod 221 is a lever structure, and the transmission rod 221 is rotatably connected to the fixed bracket 4 through the fulcrum 221a, so that when the transmission rod 221 rotates around the first axis O1, the displacements of various points of the transmission rod 221 itself are inconsistent. The voice coil connection point 221b and the vibration member connection point 221c are located at different positions of the transmission rod 221. When the transmission rod 221 rotates, the displacements of the voice coil connection point 221b and the vibration member connection point 221c are inconsistent, so that the amplitude and vibration direction of the voice coil 21 can be changed by the rotation of the transmission rod 221 and then transmitted to the vibration member 1.

[0178] It can be understood by those skilled in the art that the connection method between the fulcrum 221a of the transmission rod 221 and the fixed bracket 4 is not limited. In one embodiment, each transmission assembly further includes a rotating connection member, and the fulcrum of the transmission rod is rotatably connected to the fixed bracket via the rotating connection member. The fulcrum of the transmission member is directly rotatably connected to the fixed bracket via the rotating connection member, which can ensure that the straight line O2 where the fulcrum is located coincides with the first axis O1 (such as Figure 11a-Figure 11b As shown). The rotating connection member 222 may be, for example, a rotating shaft, a hinge mechanism, etc., which is not limited in the present application. In some other alternative ways, the fulcrum 221a may also be rotatably connected to the fixed bracket 4 through a flexible connection member, etc. In this case, the straight line O2 where the fulcrum is located may coincide with the first axis O1, or may only remain parallel to the first axis O1 but not coincident. The specific connection method between the fulcrum 221a and the fixed bracket 4 will be described later.

[0179] The type of the transmission rod 221 is not limited, and the transmission rod 221 of each transmission assembly 22 can be configured as a same-direction lever 2211 or a reverse-direction lever 2212. Fig.11a As shown, in the same direction lever 2211, along the extension direction of the transmission rod 221, the vibration member connection point 221c and the voice coil connection point 221b are located on the same side of the fulcrum 221a, the vibration member connection point 221c and the voice coil connection point 221b can rotate in the same direction around the first axis O1, and the vibration member 1 connected to the same direction lever 2211 and the voice coil 21 vibrate in the same direction. Fig.11bAs shown, in the reverse lever 2212, along the extension direction of the transmission rod 221, the vibration member connection point 221c and the voice coil connection point 221b are respectively located on both sides of the fulcrum 221a, the vibration member connection point 221c and the voice coil connection point 221b can rotate in opposite directions around the first axis O1, and the vibration member 1 connected to the reverse lever 2212 vibrates in the opposite direction to the voice coil 21.

[0180] Or it can be understood that the same direction lever 2211 can only play the role of amplifying or reducing the amplitude of the voice coil 21, while the reverse lever 2212 can not only amplify or reduce the amplitude of the voice coil 21, but also reverse the vibration direction. In the two transmission components 22 connected to the two vibrators 1, if each transmission component 22 uses a different type of transmission rod 221, for example, one uses the same direction lever 2211 and the other uses the reverse lever 2212, then the vibration direction of one of the two vibrators 1 is the same as that of the voice coil 21, and the vibration direction of the other vibrator 1 is opposite to that of the voice coil 21, so that the vibration directions of the two vibrators 1 are opposite, and the sound waves generated by the two vibrators 1 can be superimposed to obtain a higher sound pressure level. If each transmission assembly 22 uses the same type of transmission rod 221, for example, both use the same direction lever 2211 or both use the opposite direction lever 2212, then the vibration direction of the two vibrators 1 is the same as or opposite to the voice coil 21, so that the vibration directions of the two vibrators 1 are consistent, and a directional sound field is obtained, such as a dipole-shaped sound field, which can be applied in scenes where sound leakage prevention is required. Whether each transmission assembly 22 specifically uses the same direction lever 2211 or the opposite direction lever 2212 can be designed according to the actual scene, and this application does not limit this.

[0181] like Figure 7 , Figure 12a-12c As shown, in one embodiment, in the two transmission components 22 of the driving component 2, the transmission rod 221 of any transmission component 22 is set as a same-direction lever 2211, and the transmission rod 221 of the other transmission component 22 is set as a reverse lever 2212, and the two vibrators 1 vibrate in the opposite direction. Fig.12c For example, when the speaker 100 is in the initial state, the voice coil 21 is in a balanced position, and the same direction lever 2211 and the reverse lever 2212 are both in the initial state. In an example scenario, the same direction lever 2211 in the initial state can be arranged parallel to the reverse lever 2212. When the speaker 100 is in the first state ( Fig.12a , Figure 8aCorresponding scenario), the voice coil 21 vibrates downward to the first position, at which time the vibration member connection point 221c of the same-direction lever 2211 and the voice coil 21 move downward to the lowest point together, and the vibration member 1 connection member 5 of the reverse lever 2212 moves upward to the highest point under the action of the lever. In one embodiment, in order to prevent the transmission rod 221 from colliding with the voice coil 21, a avoidance distance k1 is reserved between the same-direction lever 2211 and the voice coil 21, and a avoidance distance k2 is reserved between the reverse lever 2212 and the voice coil 21. The size of the avoidance distance k1 and the avoidance distance k2 can be designed according to actual needs, and the present application does not impose any restrictions on this. The avoidance distance k1 and the avoidance distance k2 may be the same or different, and the present application does not impose any restrictions on this. When the speaker 100 is in the second state ( Fig.12c , Figure 8c Corresponding scenario), the voice coil 21 vibrates upward to the first position, at this time, the vibration member connection point 221c of the same-direction lever 2211 and the voice coil 21 move upward to the highest point, and the vibration member 1 connection member 5 of the reverse lever 2212 moves upward to the lowest point under the action of the lever, and the distance between the two vibration members 1 is the farthest.

[0182] like Fig.13 As shown, in one embodiment, the transmission rods 221 of each transmission assembly 22 are configured as unidirectional levers 2211, and the two vibrators 1 vibrate in the same direction. In an alternative embodiment, the transmission rods 221 of each transmission assembly 22 can also be configured as reverse levers 2212, and the two vibrators 1 vibrate in the same direction. Alternatively, each vibrator 1 can also be directly rigidly connected to the voice coil 21, so that each vibrator 1 and the voice coil 21 remain relatively fixed, and the two vibrators 1 vibrate in the same direction.

[0183] Those skilled in the art can understand that the positions of the fulcrum 221a, the voice coil connection point 221b and the vibration member connection point 221c on the transmission rod 221 are not limited, and the three can be located at the end, the middle or any other position of the transmission rod 221. The positional relationship of the fulcrum 221a, the voice coil connection point 221b and the vibration member connection point 221c determines the ratio of the amplitude of the vibration member 1 to the amplitude of the voice coil 21. Figure 11a-Figure 11bAs shown, in one embodiment, the distance from the vibration member connection point 221c to the straight line O2 where the fulcrum is located is greater than the distance from the voice coil connection point 221b to the straight line O2 where the fulcrum is located. When the vibration frequency of the voice coil 21 is less than or equal to the first resonant frequency of the speaker 100, the amplitude of the vibration member connection point 221c is greater than the amplitude of the voice coil connection point 221b, and the amplitude of each vibration member 1 is greater than the amplitude of the voice coil 21. The distance from the vibration member connection point 221c to the straight line O2 where the fulcrum is located represents the shortest distance from the vibration member connection point 221c to the straight line O2 where the fulcrum is located, or can be understood as a vertical distance. When the line between the vibration member connection point 221c and the fulcrum 221a is perpendicular to the straight line O2 where the fulcrum is located, the distance from the vibration member connection point 221c to the straight line O2 where the fulcrum is located is the distance from the vibration member connection point 221c to the fulcrum 221a. When the line between the vibrating member connection point 221c and the fulcrum 221a is not perpendicular to the straight line O2 where the fulcrum is located, the distance from the vibrating member connection point 221c to the straight line O2 where the fulcrum is located is the distance of the perpendicular line segment from the vibrating member connection point 221c to the straight line O2 where the fulcrum is located. Similarly, the distance from the voice coil connection point 221b to the straight line O2 where the fulcrum is located represents the shortest distance from the voice coil connection point 221b to the straight line O2 where the fulcrum is located (or can be understood as a vertical distance), which will not be described in detail below.

[0184] The distance from the vibrating member connection point 221c to the straight line O2 where the fulcrum is located is recorded as W1, and the distance from the voice coil connection point 221b to the straight line O2 where the fulcrum is located is recorded as W2. The vibration of the voice coil 21 drives the transmission rod 221 to rotate. The amplitude ratio E of the vibrating member connection point 221c and the voice coil connection point 221b (hereinafter referred to as the first ratio E) is E=W1 / W2. In an ideal state, the transmission rod 221 is regarded as an absolutely rigid rod. Since the distance W1 from the vibrating member connection point 221c to the straight line O2 where the fulcrum is located is greater than the distance W2 from the voice coil connection point 221b to the straight line O2 where the fulcrum is located, the first ratio E is greater than 1, that is, the transmission rod 221 amplifies the amplitude of the voice coil connection point 221b.

[0185] Furthermore, when the first ratio E is greater than 1, the amplitude of the vibration member 1 is also greater than the amplitude of the voice coil 21. As mentioned above, the straight line O2 where the fulcrum is located can coincide with or be parallel to the first axis O1, and the relationship between the two depends on the connection method between the fulcrum 221a of the transmission rod 221 and the fixed bracket 4. When the straight line O2 where the fulcrum is located coincides with the first axis O1, the ratio e of the amplitude of the vibration member 1 to the amplitude of the voice coil 21 (hereinafter referred to as the second ratio e) is the same as the first ratio E, which is conducive to calculating and controlling the specific value of the second ratio e. It should be noted that the "second ratio e is the same as the first ratio E" in this application only means that they are the same under ideal conditions. In actual products, due to factors such as shaft friction and bending moment generated by the transmission rod 221 during rotation, certain deviations will occur. The second ratio e is generally smaller than the first ratio E, which will not be elaborated below. When the straight line O2 where the fulcrum is located is parallel to the first axis O1 but does not coincide with it, there is a deviation between the second ratio e and the first ratio E, but it does not affect the amplification effect of the transmission member on the amplitude of the voice coil 21. When the first ratio E is greater than 1, the second ratio e is also greater than 1, so that the voice coil 21 can apply a smaller vibration to the voice coil connection point 221b, driving the vibration member connection point 221c to form a larger amplitude vibration, thereby improving the sound output performance of the speaker 100.

[0186] It should be noted that the above conclusion is obtained under the ideal condition that the transmission rod 221 is regarded as a rigid rod. In actual engineering, the first resonant frequency of the loudspeaker 100 needs to be considered. The first resonant frequency of the loudspeaker 100 (also known as the resonant frequency, resonance frequency, and first-order resonant frequency of the loudspeaker 100) refers to the natural resonant frequency of the loudspeaker 100 in the low frequency band, which is denoted as F0. Specifically, it can be expressed as the frequency corresponding to the maximum impedance value in the low frequency band on the impedance curve of the loudspeaker 100. Or it can be understood that the frequency corresponding to the first main peak of the impedance modulus of the loudspeaker 100 rising with the frequency on the impedance curve is the first resonant frequency F0. When the vibration frequency of the voice coil 21 is equal to the first resonant frequency, the movement of the voice coil connection point 221b can be transmitted to the vibration member connection point 221c according to the set ratio, so that the amplitude of the vibration member 1 and the amplitude of the voice coil 21 present a set ratio. However, when the vibration frequency of the voice coil 21 is greater than the first resonant frequency, it cannot be guaranteed that the movement of the voice coil connection point 221b is transmitted to the vibration member connection point 221c according to the set ratio.

[0187] Structurally, the transmission rod 221 vibrates under the drive of the voice coil 21. If the vibration frequency of the voice coil 21 is close to the natural frequency of the transmission rod 221, the transmission rod 221 will resonate. At this time, the shape of the transmission rod 221 is called a mode. The natural frequency is an inherent characteristic of a structure. The natural frequency of a structure is a series of values, from low frequency to high frequency. This series of natural frequencies is divided into first order, second order, third order...N order, and each order of natural frequency corresponds to a mode. When the vibration frequency of the voice coil 21 is the same as the first order natural frequency of the transmission rod 221, the transmission rod 221 is in a first order mode. At this time, the vibration frequency of the voice coil 21 is the first resonant frequency F0 of the speaker 100. In a more popular understanding, the transmission rod 221 will deform during the vibration process, and the degree of deformation increases with the increase of the frequency of vibration. When the transmission rod 221 vibrates in the high frequency band, its own deformation will have a greater impact on the ratio of the amplitude of the vibration member 1 to the amplitude of the voice coil 21, so the amplitude ratio is only relatively controllable in the low frequency band. The "low frequency band" is the frequency band before the transmission rod 221 reaches the first-order mode (including when it is in the first-order mode). Within this range, the amplitude ratio can be controlled within the required range through structural design. In the present application, the transmission rod 221 can be regarded as an approximately ideal rigid structure when the vibration frequency of the voice coil 21 is less than or equal to the first resonant frequency F0 of the speaker 100, and its deformation during the vibration process has little effect on the amplitude ratio. Within this range, it can be ensured that the ratio of the amplitude of the vibration member 1 to the amplitude of the voice coil 21 is greater than 1, that is, the amplitude of the voice coil 21 is amplified by the transmission rod 221 and transmitted to the vibration member 1.

[0188] Those skilled in the art can understand that the first resonant frequency F0 of the speaker 100 is related to the size and structure of the speaker 100 itself, and the first resonant frequency F0 of different products is different, and this application does not limit this. For example, it can be 1kHz, 2kHz, kHz, 4kHz, etc.

[0189] It should be noted that the two vibrators 1 in the speaker 100 are connected to the voice coil 21 through different transmission rods 221, and there is an amplitude amplification ratio (the second ratio e mentioned above) between each vibrator 1 and the voice coil 21. The amplitude amplification ratios of each vibrator 1 and the voice coil 21 may be the same or different, and the present application does not impose any restrictions on this.

[0190] It will be understood by those skilled in the art that, in addition to the transmission rod 221, the connecting member 5 between the voice coil 21 and the vibrator 1 may also be configured in other forms, such as a gear 511, a rotating wheel 521, etc., as long as the vibration direction of the voice coil 21 can be reversed or the amplitude of the voice coil 21 can be amplified or reduced, and the present application does not impose any restrictions on this.

[0191] See also Figure 14a-14b , Fig.14aThis is a schematic diagram of the principle structure in which a vibrating member and a voice coil in a speaker according to an embodiment of the present application are connected via gears; Fig.14b This is a schematic diagram of the principle structure in which a vibrating member and a voice coil in a speaker according to an embodiment of the present application are connected via a rotating wheel.

[0192] like Fig.14a As shown, in one embodiment, the connecting member 5 between the voice coil 21 and the vibrating member 1 can be a gear 511, wherein the fulcrum 221a of the gear 511 is located at the center of the circle of the gear 511 and can be rotatably disposed on the fixed bracket 4 through a rotating shaft, and the vibrating member connection point 221c is located on the teeth of the gear 511 and is connected to the vibrating member 1 through a rack 512. When the voice coil 21 vibrates, the voice coil 21 drives the gear 511 to rotate alternately clockwise and counterclockwise through the voice coil connection point 221b, so that the vibrating member connection point 221c on the outer periphery of the gear 511 can drive the rack 512 to move up and down, thereby driving the vibrating member 1 to vibrate through the rack 512. In some embodiments, the voice coil connection point 221b of the gear 511 is located between the outer periphery and the center of the circle of the gear 511, so that the ratio of the distance from the vibrating member connection point 221c to the straight line O2 where the fulcrum is located to the distance from the voice coil connection point 221b to the straight line O2 where the fulcrum is located is greater than 1, thereby amplifying the amplitude of the voice coil 21.

[0193] like Fig.14b As shown, in one embodiment, the connection member 5 between the voice coil 21 and the vibration member 1 can be a rotating wheel 521, wherein the fulcrum 221a of the rotating wheel 521 is located at the center of the rotating wheel 521 and can be rotatably disposed on the fixed bracket 4 through a rotating shaft, and the vibration member connection point 221c is located at the outer periphery of the rotating wheel 521, and the vibration member connection point 221c is connected to the vibration member 1 through a connection member. When the voice coil 21 vibrates, the voice coil 21 drives the transmission member to rotate alternately clockwise and counterclockwise around the fulcrum 221a through the voice coil connection point 221b, so that the vibration member connection point 221c on the outer periphery of the rotating wheel 521 vibrates, and the vibration member connection point 221c drives the vibration member 1 to vibrate through the connecting rod. In one embodiment, the voice coil connection point 221b is located between the outer periphery and the center of the rotating wheel 521, so that the ratio E of the distance W1 from the vibration member connection point 221c to the straight line O2 where the fulcrum is located and the distance W2 from the voice coil connection point 221b to the fulcrum O2 is greater than 1, thereby ensuring that the second ratio e is greater than 1.

[0194] The above describes the basic principles of the loudspeaker 100 according to the embodiment of the present application. The following provides examples of structures that may be adopted by various components in the loudspeaker 100 in conjunction with the accompanying drawings.

[0195] See also Figure 15a-Figure 26b , Figure 15a-Figure 16 This is a schematic diagram of the structure of the first implementation mode of the speaker of the present application, wherein: Fig.15aA schematic diagram of the three-dimensional structure of the speaker fixing bracket. Fig.15b for Fig.15a Front view of Fig.15c for Fig.15a The left view of Fig.16 for Fig.15a Exploded diagram of Fig.17 This is a structural schematic diagram of a first implementation mode of a transmission assembly in a driving assembly of a loudspeaker according to an embodiment of the present application; Figure 18a-18b This is a structural schematic diagram of a second implementation mode of a transmission assembly in a driving assembly of a loudspeaker according to an embodiment of the present application;

[0196] Fig.19 for Fig.18a A schematic diagram of the connection between a transmission assembly and a voice coil, wherein the transmission rod of the transmission assembly is a reverse lever; Fig. 20 for Fig.18a A schematic diagram of the structure of a transmission rod, wherein the transmission rod is a reverse lever; Fig.21 for Fig.18a A schematic diagram of the connection between a transmission assembly and a voice coil, wherein the transmission rod of the transmission assembly is a unidirectional lever; Fig. 22 for Fig.18a A schematic diagram of the structure of a transmission rod, wherein the transmission rod is a unidirectional lever; Fig.23 This is a schematic diagram of the structure of the voice coil, the transmission rod and the vibration member in the speaker of the embodiment of the present application; Fig.24a for Fig.18a A partial enlarged view of the R part; Figure 24b for Fig.18a A partial enlarged view of the middle T part; Fig.25 This is a schematic diagram of the connection structure of an implementation manner of a transmission rod and a voice coil in a driving assembly of a loudspeaker according to an embodiment of the present application; Fig.26a for Fig.25 A partial enlarged view of the middle G part; Figure 26b for Fig.25 A partial enlarged view of part J in the middle.

[0197] It will be understood by those skilled in the art that the specific structure of the vibration member 1 is not limited. Figure 15a-Figure 16 As shown, in one embodiment, the vibrating member 1 includes a diaphragm 11 and a dome 12, and the outer periphery of the diaphragm 11 is fixedly arranged on a fixing bracket 4 (refer to Fig.28 , Figure 30-Figure 31 ), the dome 12 is fixedly disposed on the diaphragm 11 so that the dome 12 and the diaphragm 11 vibrate. The voice coil 21 is connected to the diaphragms 11 or the domes 12 of the two vibrating members 1.

[0198] Among them, the dome 12 can be understood as a mass block, which can be used to increase the weight of the vibrator 1, so that the frequency of the sound emitted by the vibrator 1 can be adjusted. The outer periphery of the diaphragm 11 is fixedly arranged on the fixed bracket 4, and the dome 12 is fixedly arranged on the diaphragm 11, so that the dome 12 and the diaphragm 11 vibrate, and the diaphragm 11 is used to connect the dome 12 to the fixed bracket 4. Among them, the shapes of the dome 12 and the diaphragm 11 are not limited. In one embodiment, the dome 12 is set to a flat structure, which can reduce the size of the vibrator 1 in the first direction Z, thereby minimizing the size of the speaker 100 in the first direction Z. In other alternative embodiments, the dome 12 can also be set to other structures, such as hemispherical, conical, etc. In one embodiment, the diaphragm 11 is set to a semi-arc folded ear structure to enhance the stability of the vibration of the dome 12 in the first direction Z. In other alternative embodiments, the diaphragm 11 can also be set to a wavy folded ear structure, etc., which are not listed one by one in this application.

[0199] It should be noted that the material of the dome 12 is not limited. In some embodiments, the dome 12 is made of a rigid material so that the dome 12 is not easily deformed or twisted during the vibration process, and the vibration stability is maintained, thereby improving the sound quality of the vibration member 1 and reducing the distortion rate of the speaker 100.

[0200] It should be noted that the voice coil 21 can be connected to the diaphragm 11 or the dome 12 of the vibrator 1 through the transmission assembly 22, and the present application does not limit this. In one embodiment, the voice coil 21 is connected to the dome 12 of the vibrator 1 through the transmission assembly 22.

[0201] It can be understood by those skilled in the art that the shape of the voice coil 21 is not limited. In one embodiment, the voice coil 21 is configured as an annular structure. The voice coil 21 has two end faces in the first direction Z. Among them, one end face of the voice coil 21 faces the vibrator 1, and the other end face of the voice coil 21 extends into and is located in the accommodation space of the magnetic circuit assembly 3. In other alternative embodiments, the voice coil 21 can also be configured as other shapes, such as a columnar shape, etc., which are not listed one by one in this application.

[0202] It will be understood by those skilled in the art that the specific shape of the transmission rod 221 is not limited. In one embodiment, the transmission rod 221 of each transmission assembly 22 is configured as a straight rod structure with an L-shaped, H-shaped, V-shaped or C-shaped cross section, thereby increasing the rigidity and bending resistance of the transmission rod and avoiding distortion of the transmission rod during transmission vibration, that is, the ratio of the distance is greater than the ratio of the amplitude, so that the transmission capacity of the transmission rod is increased and the vibration effect of the vibrating member 1 is ensured. At the same time, it is possible to avoid an increase in the mass of the lever and affect the lightweight goal. Figure 16-Figure 23As shown, in one embodiment, the transmission rod 221 of each transmission assembly 22 is configured as a straight rod structure with an L-shaped cross section. In other alternative embodiments, the transmission rod 221 can also be configured as an arc-shaped rod structure, a wavy rod structure, etc., which are not listed one by one in this application.

[0203] Those skilled in the art can understand that each vibration member 1 is connected to the voice coil 21 through a transmission assembly 22, and each transmission assembly 22 may be provided with one or more transmission rods 221, and the number of transmission rods 221 in each transmission assembly 22 may be the same or different, and the present application does not impose any limitation on this. Fig.17 As shown, in one embodiment, each transmission assembly 22 is provided with only one transmission rod 221. Fig.16 , Figure 18a-Figure 23 As shown, in one embodiment, each transmission assembly 22 includes a plurality of transmission rods 221, and the plurality of transmission rods 221 are centrally symmetrically distributed relative to the voice coil 21. The specific number of transmission rods 221 in each transmission assembly 22 is not limited, and there may be 2, 3 or more transmission rods 221. In one embodiment, each transmission assembly 22 is provided with two transmission rods 221, and the two transmission rods 221 are centrally symmetrically distributed relative to the voice coil 21. Fig.19 , Fig.21 It is understood that the central symmetrical distribution means that the two transmission rods 221 are arranged circumferentially around the geometric center of the voice coil 21. In one example, the voice coil 21 is in the shape of a rectangular ring, and its geometric center is the intersection of the two diagonals of the rectangle. In one example, the voice coil 21 is circular, and its geometric center is the center of the circle. With such a structure, when the voice coil 21 is arranged in the central area of ​​the vibration member 1 in a plane perpendicular to the first direction Z, the transmission rods 221 in each group of transmission assemblies 22 are also centrally symmetrically distributed relative to the corresponding vibration member 1, so that each vibration member 1 is subjected to force more evenly, which plays a role in stabilizing the transmission of the vibration member 1, and avoids the vibration member 1 from resonating due to uneven force on the vibration member 1 during vibration, resulting in distortion of the sound emitted by the vibration member 1.

[0204] In other alternative embodiments, the multiple transmission rods 221 of a transmission assembly 22 may also be distributed in an axisymmetric manner, or may be arranged asymmetrically. Specifically, the present application does not limit this.

[0205] Those skilled in the art will appreciate that the connection method between each vibration member 1 and the corresponding transmission assembly 22 is not limited, and the connection may be direct or indirect via other components. Figure 17-Figure 23 As shown, in one embodiment, each transmission assembly 22 further includes a vibration member bracket 223, and the vibration member bracket 223 is arranged corresponding to the vibration member connection point 221c of the transmission rod 221, and the vibration member connection point 221c of the transmission rod 221 is connected to the vibration member 1 through the corresponding vibration member bracket 223. Figure 18a-Figure 23 As shown, when each transmission assembly 22 includes a plurality of transmission rods 221, each transmission assembly 22 is also provided with a plurality of vibration member brackets 223, and the plurality of vibration member brackets 223 correspond one-to-one to each vibration member connection point 221c in the plurality of transmission rods 221. For example, when each transmission assembly 22 includes two transmission rods 221, two vibration member brackets 223 are also provided. In other alternative embodiments, when each transmission assembly 22 includes a plurality of transmission rods 221, the transmission structure may include only one vibration member bracket 223, and the vibration member bracket 223 may be provided as an annular structure, and each vibration member connection point 221c is connected to the same vibration member bracket 223, and the vibration member 1 is driven to vibrate through the same vibration member bracket 223, and the present application does not impose any limitation on this.

[0206] It will be understood by those skilled in the art that the contact mode between the vibration member bracket 223 and the vibration member 1 is not limited. In one embodiment, the vibration member bracket 223 and the vibration member 1 are in surface contact (i.e., the contact portion between the vibration member bracket 223 and the vibration member 1 is a surface). In other alternative embodiments, the vibration member bracket 223 and the vibration member 1 may also be in point contact (i.e., the contact portion between the vibration member bracket 223 and the vibration member 1 is a point) or line contact (i.e., the contact portion between the vibration member bracket 223 and the vibration member 1 is a line). It should be noted that the side of the vibration member bracket 223 facing the vibration member 1 may be in contact with the vibration member 1 in all areas, or may be in contact with the vibration member 1 in only a part of the area. Specifically, this application does not impose any limitation.

[0207] The vibration member bracket 223 forms a surface contact with the vibration member 1, which can increase the interaction area between the vibration member bracket 223 and the vibration member 1, reduce the pressure of the vibration member bracket 223 on the vibration member 1, and prevent the vibration member bracket 223 from damaging the vibration member 1 during rapid vibration. On the other hand, the vibration force of the vibration member connection point 221c can be evenly applied to the vibration member 1 through the vibration member bracket 223, so as to ensure the stability of the vibration member 1 during vibration and reduce the distortion rate of the sound of the vibration member 1.

[0208] It will be understood by those skilled in the art that the specific shape of the vibration member bracket 223 is not limited, and the connection method between the vibration member bracket 223 and the transmission rod 221 is not limited. In one embodiment, one end of the vibration member bracket 223 is connected to the vibration member connection point 221c of the transmission rod 221. In some embodiments, the vibration member bracket 223 and the transmission member are distributed in an "L-shape". Thereby, the surface contact area between the vibration member bracket 223 and the vibration member 1 is increased to ensure the vibration stability and sound performance of the vibration member 1, and at the same time, the fixing area between the vibration member bracket 223 and the vibration member 1 can be increased to ensure the connection stability between the vibration member bracket 223 and the vibration member 1. Among them, the vibration member bracket 223 and the vibration member 1 can be fixed by bonding, or by other fixing methods such as welding and snap connection.

[0209] like Figure 16-Figure 23 As shown, in one embodiment, the vibration member bracket 223 and the transmission member have a height difference in the first direction Z, so that the voice coil 21 and the vibration member 1 spaced apart in the first direction Z can be more conveniently and reliably connected through the transmission member and the vibration member bracket 223. It should be noted that the specific position and specific structure of the height difference between the vibration member bracket 223 and the transmission member are not limited. In one example, the vibration member connection point 221c of the transmission member has a connection block 2231 extending along the first direction Z, and the end of the connection block 2231 away from the vibration member connection point 221c is connected to the vibration member bracket 223 through a U-shaped structure.

[0210] When the voice coil 21 drives the transmission member to vibrate, the vibration member connection point 221c moves up and down along the first direction Z driven by the transmission member, and at the same time, a slight displacement occurs in the direction perpendicular to the first direction Z. As a result, the vibration member bracket 223 connected to the vibration member connection point 221c will apply stress in the direction perpendicular to the first direction Z to the vibration member 1 in the process of driving the vibration member 1 to vibrate up and down along the first direction Z, thereby reducing the vibration stability of the vibration member 1. A U-shaped structure is provided at one end of the vibration member bracket 223 connected to the vibration member connection point 221c. In the process of the transmission member driving the vibration member bracket 223 to vibrate, the U-shaped structure at one end of the vibration member bracket 223 can be slightly deformed, thereby absorbing the slight displacement of the vibration member connection point 221c in the direction perpendicular to the first direction Z, avoiding or reducing the stress generated by the vibration member bracket 223 on the vibration member 1 in the direction perpendicular to the first direction Z, thereby improving the vibration stability of the vibration member 1.

[0211] In other alternative embodiments, the vibration member bracket 223 may also be configured as other structures. For example, the vibration member bracket 223 may be configured as a rod-shaped structure extending in an S-shape, or the vibration member bracket 223 may also be configured as a rod-shaped structure having at least one bending structure. Specifically, the present application does not limit this.

[0212] Those skilled in the art will appreciate that the voice coil 21 and the transmission rods 221 may be connected in any manner, and may be directly connected or indirectly connected via other components. Figure 17-Figure 23 As shown, in one embodiment, each transmission assembly 22 further includes a voice coil bracket 224, and the voice coil connection point 221b of the transmission rod 221 is connected to the voice coil 21 through the voice coil bracket 224. Similarly, when the transmission assembly 22 includes multiple transmission rods 221, multiple voice coil brackets 224 may also be provided correspondingly, and the multiple voice coil brackets 224 correspond to the multiple transmission rods 221 one by one, or the multiple transmission rods 221 may also share one voice coil bracket 224, which will not be described in detail here.

[0213] The voice coil bracket 224 can increase the force-bearing area between the voice coil connection point 221b and the voice coil 21, and prevent the voice coil 21 from directly interacting with the voice coil connection point 221b of the transmission rod 221, thereby reducing the stress generated between the voice coil connection point 221b and the voice coil 21 during the vibration of the voice coil 21, thereby reducing the risk of damage to the voice coil 21 and improving the service life of the voice coil 21. The voice coil bracket 224 and the voice coil 21 can be fixed by bonding, welding, snap connection, etc., or the voice coil bracket 224 and the voice coil 21 can be connected by an integrated molding method.

[0214] The shape and structure of the voice coil support 224 are not limited. In one embodiment, the voice coil 21 and the transmission rod 221 have a height difference in the first direction Z. Fig.24a , Figure 25-26a As shown, in one embodiment, the voice coil bracket 224 includes a protrusion 2241 and a connecting block 2242, the protrusion 2241 extends in a direction perpendicular to the first direction Z, is fixedly connected to the voice coil 21 and protrudes from the outer peripheral side of the voice coil 21, and the connecting block 2242 extends in the first direction Z, one end of the connecting block is connected to the protrusion 2241, and the other end is connected to the transmission rod 221, so as to connect the voice coil 21 and the transmission rod 221 which are spaced apart in the first direction Z.

[0215] The connection method between the connecting block 2242 and the protrusion 2241 is not limited. Fig.24a As shown, in one embodiment, the protrusion 2241 is set as a plate-like structure, the connecting block 2242 is set as a rod-like structure, and the two ends of the connecting block 2242 are respectively plugged with the protrusion 2241 and the transmission rod 221. For example, the connecting block 2242 of the rod-like structure can be a pin shaft, etc., and this application does not limit this. Fig.26aAs shown, in one embodiment, the connection block may include a first portion 2242a and a second portion 2242b, the first portion 2242a is plugged into the protrusion, the second portion 2242b is plugged into the transmission rod 221, and the first portion 2242a and the second portion 2242b are fixedly connected. The first portion 2242a and the second portion 2242b may both be rivets, and the first portion 2242a and the second portion 2242b may be fixed by bonding, welding, etc., which is not limited in the present application. In one embodiment, the first portion 2242a and the second portion 2242b are bonded by soft glue.

[0216] In one embodiment, the voice coil support 224 may also be provided as an annular structure extending along the circumference of the voice coil 21. The annular voice coil support 224 covers and is fixed to any end surface of the voice coil 21 in the first direction Z, for example, it may cover the end surface of the voice coil 21 facing the vibrator 1. A connecting member protruding outwards, such as a support plate, a connecting block, etc., may be provided on the outer circumference of the annular voice coil support 224 at a position corresponding to the voice coil connection point 221b. The connecting member may cover and connect to the voice coil connection point 221b in the first direction Z, so that the voice coil connection point 221b of the transmission rod 221 is connected to the voice coil 21 through the connecting member and the annular voice coil support 224 in sequence. At this time, the vibration of the voice coil 21 in the first direction Z can be completely transmitted to the annular voice coil bracket 221, and the vibration force is transmitted to the voice coil connection point 221b of the transmission rod 221 through the connecting piece through the annular voice coil bracket 224, so as to ensure the stability of the vibration output of the voice coil 21, thereby completely transmitting the vibration of the voice coil 21 to the voice coil connection point 221b of the transmission rod 221, reducing the deviation in the vibration transmission process that causes the loss of vibration information, thereby reducing the distortion rate of the speaker 100.

[0217] As mentioned above, a rotating connection member 222 is provided between the fulcrum 221a of each transmission member and the fixed bracket 4, and the rotating connection member 222 can be in the form of a hinge mechanism or the like. Figure 17-18b , Figure 24b , Figure 25-26b As shown, in one embodiment, the rotating connecting member 222 includes a protrusion 2221 and a connecting block 2222. The protrusion 2221 is rotatably connected to the fixed bracket 4. The connecting block 2222 connects the transmission rod 221 and the protrusion 2221. Since the protrusion 2221 can rotate relative to the fixed bracket 4, the transmission rod 221 as a whole can rotate relative to the fixed bracket 4. Figure 26bAs shown, in one embodiment, the connecting block 2222 may include a first portion 2222a and a second portion 2222b, the first portion 2222a is plugged into the protrusion 2221, the second portion 2222b is plugged into the transmission rod 221, and the first portion 2222a and the second portion 2222b are fixedly connected. The first portion 2222a and the second portion 2222b may both be rivets, and the first portion 2222a and the second portion 2222b may be fixed by bonding, welding, etc., which is not limited in the present application. In one embodiment, the first portion 2222a and the second portion 2222b are bonded by soft glue.

[0218] In one embodiment, the rotating connecting member 222 may also be a fixing frame 2223 (see Fig.32 ), the fixing frame 2223 is fixedly connected to the fixing bracket 4, and during the rotation of the transmission rod 221, the fulcrum 221a of the transmission rod 221 always contacts the fixing frame 2223. The fixing method between the fixing frame 2223 and the fixing bracket 4 is not limited, and can be fixed by bonding, welding, riveting and other methods. In one embodiment, the fixing frame 2223 and the fixing bracket 4 are fixed by plugging, and a part of the structure of the fixing frame 2223 is embedded in the fixing bracket 4 (see Fig.32 ).

[0219] like Figure 17-Figure 19 , Figure 21-22 As shown, in one embodiment, the rotating connecting member 222 can also be a connecting frame 2224, one end of the connecting frame 2224 is fixedly connected to the fixed bracket 4, and the other end is connected to the fulcrum 221a of the transmission rod 221 through a U-shaped structure. The U-shaped structure can be deformed so that the transmission rod 221 can rotate relative to the connecting frame 2224. The U-shaped structure can be made of a flexible material such as rubber, and this application does not impose any restrictions on this. The fixing method between the connecting frame 2224 and the fixed bracket 4 is not limited, and can be fixed by various methods such as bonding, welding, and riveting. In one embodiment, the connecting frame 2224 and the fixed bracket 4 are fixed by plugging, and a part of the structure of the connecting frame 2224 is embedded in the fixed bracket 4 (see Fig.32 ).

[0220] In one embodiment, a substrate layer (not shown in the figure) may be further provided in the speaker 100. The substrate layer may flexibly connect the voice coil 21 and the fixed bracket 4. When the voice coil 21 vibrates, the substrate layer may deform to ensure that the transmission member can rotate relative to the fixed bracket 4 through the deformation of the substrate layer. The substrate layer may be made of a flexible material as a whole, or only the deformable part may be made of a flexible material. The flexible material may be, for example, a polymer material such as rubber or plastic. The substrate layer not only performs the function of flexible connection, but also provides a routing space for the circuit connected to the voice coil 21. For example, a circuit may be provided in the substrate layer, or a flexible circuit board may be used as a whole to simplify the structure of the speaker 100.

[0221] See also Figure 27-Figure 32 , Fig. 27 This is a schematic diagram of the principle of the second implementation mode of the loudspeaker according to the embodiment of the present application; Figure 28-Figure 32 This is a schematic diagram of the structure of the second embodiment of the speaker of the present application, wherein: Fig.28 is a schematic diagram of the three-dimensional structure of the speaker. Fig.29a for Fig.28 Front view of the fixing bracket. Fig.29b for Fig.28 Go to the left view of the fixed bracket, Fig.30 for Fig.28 An exploded diagram of Fig.31 This is a schematic diagram of the three-dimensional structure of a speaker without a diaphragm. Fig.32 Schematic diagram of the three-dimensional structure of the speaker without one diaphragm and fixing bracket.

[0222] It will be appreciated by those skilled in the art that the number of driving components 2 in the speaker 100 is not limited. Figure 15a-Figure 16 As shown, in one embodiment, the speaker 100 includes only one driving assembly 2, and one driving assembly 2 can drive two diaphragms 11 to vibrate. Further, the line between the centers of the two vibrators 1 is the first line O3, the first line O3 is parallel to the first direction Z (that is, the two vibrators 1 are aligned in the first direction Z), and the first line O3 passes through the center of the driving assembly 2. Or it can be understood that the driving assembly 2 is correspondingly arranged in the central area of ​​each vibrator 1 in a plane perpendicular to the first direction Z to ensure the force balance of each vibrator 1.

[0223] In some scenarios, the area of ​​the vibration member 1 is large, and only one driving component 2 may not be able to stably support the vibration member 1, and the driving force for the vibration of the vibration member 1 is insufficient. In this case, multiple driving components 2 can be set between the two vibration members 1 to increase the force points of each vibration member 1 and provide sufficient driving force.

[0224] like Figure 28-Figure 32As shown, in some embodiments, the speaker 100 includes a plurality of driving components 2, and the plurality of driving components 2 are distributed in a plane perpendicular to the first direction Z. Or it can be understood that the voice coils 21 of the plurality of driving components 2 are distributed in a plane perpendicular to the first direction Z, and in the first direction Z, the speaker 100 only includes the thickness of one voice coil 21, and this structure does not increase the thickness of the speaker 100. The specific number of driving components 2 is not limited, and can be 2, 3, 4, etc.

[0225] Those skilled in the art will appreciate that there is no limit to the distribution of the plurality of vibrators 1. In one embodiment, the plurality of drive components 2 are centrally symmetrically distributed around the first connecting line O3. With this layout, the force on each vibrator 1 is more uniform.

[0226] Specifically, in one embodiment, the plurality of drive assemblies 2 are two drive assemblies 2, the two drive assemblies 2 are axially symmetrically distributed relative to the second axis O4, the second axis O4 intersects the first connecting line O3, and is perpendicular to the first connecting line O3. Or it can be understood that the two drive assemblies 2 are not only centrally symmetrically distributed in a plane perpendicular to the first direction Z, but also axially symmetrically distributed.

[0227] It should be noted that the above-mentioned centrosymmetric distribution and axisymmetric distribution only represent the position distribution of the driving components 2, and do not include the internal structure of each driving component 2. For example, when two driving components 2 are provided in the speaker 100, the two driving components 2 are regarded as two mass points, and the positions of the two mass points are centrosymmetric around the first connecting line O3 and axisymmetric with respect to the second axis O4, while the transmission rod 221, voice coil bracket 224, vibration component bracket 223 and other structures in each driving component 2 are not necessarily centrosymmetric around the first connecting line O3, nor are they necessarily axisymmetric with respect to the second axis O4, and this is not limited in the art.

[0228] In one embodiment, the internal structures of the two driving components 2 are also axially symmetrically distributed relative to the second axis O4, specifically including: the number of transmission rods 221 in the two transmission components 22 is the same, the setting positions of the transmission rods 221 are axially symmetrical relative to the second axis O4, and other structures such as the voice coil bracket 224 and the vibration component bracket 223 are also axially symmetrical with respect to the second axis O4.

[0229] It is understood by those skilled in the art that the layout of the driving assembly 2 in the speaker 100 needs to be designed according to the shape adaptability of the vibration element 1. Figure 15a-Figure 32 As shown, in one embodiment, the speaker 100 is an overall rectangular structure, each vibration member 1 is an overall rectangular structure, the voice coil 21 of each driving component 2 is also an overall rectangular structure, the length direction of the speaker 100 is the second direction X, and the width direction of the speaker 100 is the third direction Y.

[0230] like Figure 15a-Figure 16 Figure 18a-Figure 23 As shown, in one embodiment, the speaker 100 is provided with only one driving assembly 2, the length direction of the voice coil 21 is arranged along the second direction X, and the width direction of the voice coil 21 is arranged along the third direction Y. In one embodiment, each transmission assembly 22 includes two transmission rods 221, and each transmission rod 221 extends along the second direction X. In addition, the two vibration member brackets 223 protrude from the two side edges of the voice coil 21 in the second direction X, so that the driving assembly 2 as a whole has a longer length in the second direction X, and the two vibration member brackets 223 are closer to the two side edges of the vibration member 1 in the second direction X, so that the vibration member 1 is evenly stressed.

[0231] like Figure 28-Figure 32 As shown, in one embodiment, the speaker 100 is provided with two driving assemblies 2, and the two driving assemblies 2 are arranged along the second direction X to stably support two vibrators 1. Further, the length direction of the voice coil 21 in each driving assembly 2 is arranged along the second direction X, and the width direction of the voice coil 21 in each driving assembly 2. In one embodiment, each transmission assembly 22 includes two transmission rods 221, and each transmission rod 221 extends along the second direction X. When this layout is adopted, the vibration member bracket 223 in each driving assembly 2 may protrude from the two side edges of the voice coil 21 in the second direction X, or may not protrude from the two side edges of the voice coil 21 (for example, it is stacked with the voice coil 21 in the first direction Z, or is located inside the voice coil 21, etc.). In one embodiment, the vibration member bracket 223 in each driving assembly 2 protrudes from the two side edges of the voice coil 21 in the second direction X, and compared with the structure in which only one driving assembly 2 is provided, the distance between each vibration member bracket 223 and the side edge of the voice coil 21 is smaller, so that the structure of each driving assembly 2 is more compact.

[0232] It should be noted that the above embodiments are only examples and do not limit the shape of the speaker 100 provided in this application. In some embodiments, the speaker 100 as a whole can also be set to a circular, elliptical, irregular, etc. structure, the layout of the drive component 2 and the internal structure of the drive component 2 can also be adjusted accordingly, and this application will not list them one by one.

[0233] See also Figure 33-34b , Fig.33 This is a schematic diagram of the principle structure of the third implementation mode of the speaker of the present application embodiment; Fig.34a This is a schematic diagram of the cooperation between the driving assembly and the vibrating member in an implementation manner of a speaker according to an embodiment of the present application; Fig.34b This is a schematic diagram of the coordination between the driving assembly and the vibrating element in the third embodiment of the speaker according to the present application.

[0234] Those skilled in the art will readily appreciate that the voice coil 21 may or may not be stacked with the two vibration elements 1 in the first direction Z. Figure 15a-Figure 29b As shown, in one embodiment, the projection of the voice coil 21 on each of the two vibrators 1 along the first direction Z is located inside each vibrator 1, that is, the voice coil 21 can be stacked with the two vibrators 1 in the first direction Z, and can be completely covered by the two vibrators 1.

[0235] like Fig.33 As shown, in one embodiment, the voice coil 21 of each driving assembly 2 is not overlapped with the two vibrating members 1 in the first direction Z. For example, in one embodiment, the loudspeaker 100 includes only one driving assembly 2, the voice coil 21 of the driving assembly 2 is arranged in an annular shape, and the voice coil 21 is not overlapped with the two vibrating members 1 in the first direction Z, that is, in a plane perpendicular to the first direction Z, each vibrating member 1 is sleeved inside the annular voice coil 21. In an alternative embodiment, the loudspeaker 100 includes a plurality of driving assemblies 2, the plurality of vibrating assemblies are distributed in a plane perpendicular to the first direction Z, and the plurality of driving assemblies 2 are arranged around the periphery of the two vibrating members 1, and the voice coil 21 of each driving assembly 2 in the plurality of driving assemblies 2 is not overlapped with the two vibrating members 1 in the first direction Z, for example, one driving assembly 2 is arranged on each side of the voice coil 21 along the second direction X, and the voice coils 21 of the two driving assemblies 2 are not overlapped with the two vibrating members 1. With this structure, the thickness of the loudspeaker 100 can be made thinner, which is analyzed in detail below.

[0236] like Fig.34a As shown, if the vibration member 1 and the voice coil 21 are stacked in the first direction Z, at least a part of the structure of the transmission rod 221 is also stacked with the vibration member 1. When the speaker 100 is in the first state, each vibration member 1 is closest to the voice coil 21. At this time, the vibration member 1 is easy to collide with the transmission rod 221, for example, with the fulcrum 221a of the transmission rod 221. Therefore, a certain avoidance gap 51 needs to be reserved between the vibration member 1 and the transmission rod 221, and avoidance also needs to be made between the transmission rod 221 and the voice coil 21 (such as k1 and k2 mentioned above). Fig.34b As shown, if the vibration member 1 and the voice coil 21 are not overlapped in the first direction Z, and most of the structures of the vibration member 1 and the transmission rod 221 are not overlapped, for example, only the vibration member connection point 221c at the end is overlapped with the vibration member 1, it is difficult for the loudspeaker 100 to collide with the transmission rod 221 when it is in the first state, and no avoidance gap is required between the two, and no avoidance gap is required between the transmission rod 221 and the voice coil 21, thereby further reducing the thickness of the loudspeaker 100.

[0237] As mentioned above, the specific structure of the fixing bracket 4 is not limited. Fig.28 , Figure 30-Figure 31As shown, in one embodiment, the fixing bracket 4 is arranged in a ring shape and is located outside the outer periphery of the voice coil 21. The fixing bracket 4 can not only play a supporting and protective role, but also be used as a shell of the speaker 100 to prevent the voice coil 21 from being squeezed and collided by external forces, and can also prevent dust, water vapor, etc. from entering the interior of the speaker 100.

[0238] See also Figure 35-Figure 36 , Fig.35 A schematic diagram of another loudspeaker according to an embodiment of the present application; Fig.36 This is a schematic diagram of the structure of another speaker according to an embodiment of the present application.

[0239] like Figure 35-Figure 36 As shown, the present application provides a speaker 300, including a fixed bracket 73, two vibration members 71 spaced apart in a first direction Q1, and two voice coils 72 disposed between the two vibration members 71, each of the two vibration members 71 is mounted on the fixed bracket 73, the two voice coils 72 correspond to the two vibration members 71 one by one, and each voice coil 72 is connected to the corresponding vibration member 71. The connection method between the voice coil 72 and the vibration member 71 can adopt the structure described above, and the present application does not limit this.

[0240] The loudspeaker 300 further includes two transmission assemblies 8 corresponding to the two voice coils 72, and each voice coil 72 is connected to a corresponding vibration member 71 through a corresponding transmission assembly 8. Each voice coil 72 can vibrate relative to the fixed bracket 73 along a first direction Q1, and can drive the corresponding vibration member 71 to vibrate in the first direction Q1 through the corresponding transmission assembly 8.

[0241] Each transmission assembly 8 includes a transmission rod 81, and the transmission rod 81 has a fulcrum 81a, a voice coil connection point 81b and a vibration member connection point 81c that are spaced apart. The voice coil connection point 81b is connected to the voice coil 72, and the vibration member connection point 81c is connected to the vibration member 71. The fulcrum 81a is rotatably arranged on the fixed bracket 73, and the transmission rod 81 rotates around the first axis. Among them, the distance from the vibration member connection point 81c to the straight line where the fulcrum 81a is located is greater than the distance from the voice coil connection point 81b to the straight line where the fulcrum 81a is located. The specific structure of the transmission rod 81 can adopt the structure described above, and this application does not limit this.

[0242] By adopting the above technical solution, the two voice coils 72 of the speaker 300 both drive the vibrator 71 to vibrate through the transmission rod 81, and the distance from the vibration member connection point 81c of the transmission rod 81 to the straight line where the fulcrum 81a is located is greater than the distance from the voice coil connection point 81b to the straight line where the fulcrum 81a is located, so that the vibration amplitude of the vibration member connection point 81c is greater than the vibration amplitude of the voice coil connection point 81b, so that the voice coil 72 can apply a smaller amplitude to the voice coil connection point 81b, driving the vibration member connection point 81c to link the vibration member 71 to form a larger amplitude vibration. When the voice coil 72 vibrates with a smaller amplitude, the voice coil 72 can drive the vibration member 71 to vibrate with a larger amplitude through the transmission rod 81, thereby achieving the amplification effect of the amplitude of the voice coil 72 (or it can be understood that the vibration amplitude of each voice coil 72 is smaller than the vibration amplitude of the vibration member 71 connected thereto).

[0243] Compared to the loudspeaker 300 in which the vibration amplitude of the vibrating member 71 and the voice coil 72 are consistent, the loudspeaker 300 of the present application can have a smaller size in the first direction Q1 while ensuring that the maximum vibration amplitude of the vibrating member 71 is the same, thereby reducing the space occupied by the loudspeaker 300 in the first direction Q1 and being easier to be set in a small space (such as an electronic device with a thin thickness). Alternatively, compared to the loudspeaker 300 in which the vibration amplitude of the vibrating member 71 and the voice coil 72 are consistent, the loudspeaker 300 of the present application can have a larger maximum vibration amplitude of the vibrating member 71 while maintaining the same size in the first direction Q1, thereby improving the sound performance of the loudspeaker 300. In addition, by adjusting the ratio of the amplitude of the vibrating member 71 to the amplitude of the voice coil 72, the size of the loudspeaker 300 in the first direction Q1 can be further reduced while ensuring that the maximum vibration amplitude of the vibrating member 71 is the same. Alternatively, while the size of the loudspeaker 300 in the first direction Q1 remains unchanged, the maximum vibration amplitude of the vibrating member 71 of the loudspeaker 300 can be further increased, thereby improving the sound performance of the loudspeaker 300. Therefore, the speaker 300 of the present application can take into account both good sound quality and a smaller size in the vibration direction, that is, the speaker 300 can ensure sufficient loudness and low-frequency output capability under the premise of a small thickness.

[0244] In one embodiment, the two voice coils 72 of the speaker 300 are arranged along the second direction Q2, and the second direction Q2 is perpendicular to the first direction Q1. The two voice coils 72 are not overlapped in the first direction Q1, and the two voice coils 72 are at least partially overlapped in the second direction Q2. Alternatively, it can be understood that the two voice coils 72 are staggered in the second direction Q2 and can be located at the same height in the first direction Q1, which can further reduce the size of the speaker 300 in the first direction Q1.

[0245] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and modifications of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and modifications.

Claims

1. A speaker, comprising a fixed bracket, a driving assembly, and two vibrators spaced apart in a first direction, wherein the two vibrators are mounted on the fixed bracket, the driving assembly is disposed between the two vibrators, and the two vibrators vibrate in the same or opposite directions relative to the fixed bracket in the first direction under the drive of the driving assembly, characterized in that: The driving component includes a voice coil, which is arranged between the two vibrators in the first direction and connected to the two vibrators respectively. The voice coil can vibrate relative to the fixed bracket along the first direction and drive the two vibrators to vibrate.

2. The loudspeaker according to claim 1, characterized in that The driving assembly also includes two transmission assemblies, and the two transmission assemblies are arranged in a one-to-one correspondence with the two vibrators. The two transmission assemblies are respectively arranged on both sides of the voice coil in the first direction. The voice coil is respectively connected to the two vibrators through the two transmission assemblies and drives the two vibrators to vibrate.

3. The loudspeaker according to claim 2, characterized in that Each of the two transmission assemblies includes a transmission rod, and the transmission rod has a fulcrum, a voice coil connection point and a vibration member connection point that are spaced apart. The voice coil connection point is connected to the voice coil, and the vibration member connection point is connected to the corresponding vibration member. The transmission rod is rotatably connected to the fixed bracket through the fulcrum and rotates around a first axis; wherein the straight line where the fulcrum is located is parallel to or coincides with the first axis.

4. The loudspeaker according to claim 3, characterized in that The distance from the connection point of the vibration member to the straight line where the fulcrum is located is greater than the distance from the connection point of the voice coil to the straight line where the fulcrum is located. When the vibration frequency of the voice coil is less than or equal to the first resonant frequency of the speaker, the amplitude of the connection point of the vibration member is greater than the amplitude of the connection point of the voice coil, and the amplitude of each of the vibration members is greater than the amplitude of the voice coil.

5. The loudspeaker according to claim 3 or 4, characterized in that: The transmission rod of each transmission assembly is configured as a same-direction lever or a reverse-direction lever; In the same-direction lever, along the extension direction of the transmission rod, the connection point of the vibration member and the connection point of the voice coil are located on the same side of the fulcrum, the first axis of the connection point of the vibration member and the connection point of the voice coil rotate in the same direction, and the vibration member connected to the same-direction lever vibrates in the same direction as the voice coil; In the reverse lever, along the extension direction of the transmission rod, the vibration member connection point and the voice coil connection point are respectively located on both sides of the fulcrum, the vibration member connection point and the voice coil connection point can rotate in opposite directions around the first axis, and the vibration member connected to the reverse lever vibrates in the opposite direction to the voice coil.

6. The loudspeaker according to claim 5, characterized in that In the two transmission assemblies of the driving assembly, the transmission rod of any one of the transmission assemblies is set as the same-direction lever, and the transmission rod of the other transmission assembly is set as the reverse lever, and the two vibrators vibrate in reverse directions.

7. The loudspeaker according to claim 5, characterized in that In the two transmission assemblies of the driving assembly, the transmission rod of each transmission assembly is configured as the same-direction lever or the opposite-direction lever, and the two vibrators vibrate in the same direction.

8. The loudspeaker according to any one of claims 3 to 7, characterized in that: Each of the transmission components also includes a voice coil bracket and a vibration member bracket. The voice coil connection point of the transmission rod is connected to the voice coil through the voice coil bracket, and the vibration member connection point of the transmission rod is connected to the corresponding vibration member through the vibration member bracket; there is surface contact between the vibration member bracket and the corresponding vibration member.

9. The loudspeaker according to any one of claims 3 to 8, characterized in that: Each of the transmission assemblies further comprises a rotating connection member, through which the fulcrum of the transmission rod is rotatably connected to the fixed bracket; the rotating connection member is configured as a hinge structure or a rotating shaft structure.

10. The loudspeaker according to any one of claims 3 to 9, characterized in that: The transmission rod of each transmission assembly is configured as a straight rod structure with an L-shaped, H-shaped, V-shaped or C-shaped cross section.

11. The loudspeaker according to any one of claims 3 to 10, characterized in that: Each of the transmission assemblies includes a plurality of transmission rods, and the plurality of transmission rods are distributed in a centrally symmetrical manner relative to the voice coil.

12. The loudspeaker according to claim 11, characterized in that Each of the transmission components also includes a plurality of vibration member brackets, and the plurality of vibration member brackets are arranged in a one-to-one correspondence with each of the vibration member connection points in the plurality of transmission rods, and each of the vibration member connection points in the plurality of transmission rods is connected to the vibration member through the corresponding vibration member bracket.

13. The loudspeaker according to any one of claims 1 to 12, characterized in that: The projection of the voice coil on each of the two vibrators along the first direction is located inside each of the vibrators.

14. The loudspeaker according to any one of claims 1 to 13, characterized in that: The loudspeaker comprises only one driving assembly, the voice coil of the driving assembly is arranged in a ring shape, and the voice coil is not overlapped with the two vibration members in the first direction; Alternatively, the speaker includes a plurality of the driving components, the plurality of the vibration components are distributed in a plane perpendicular to the first direction, and the plurality of the driving components are arranged around the periphery of the two vibration members, and the voice coil of each of the plurality of the driving components is not overlapped with the two vibration members in the first direction.

15. The loudspeaker according to any one of claims 1 to 14, characterized in that: A line connecting the centers of the two vibrating members is a first line, and the first line is parallel to the first direction; The loudspeaker includes only one driving component, and the first connecting line passes through the center of the driving component.

16. The loudspeaker according to any one of claims 1 to 15, characterized in that: The speaker includes a plurality of driving components, and the plurality of driving components are distributed in a plane perpendicular to the first direction; the line between the centers of the two vibrating elements is a first line, and the first line is parallel to the first direction, and the plurality of driving components are distributed symmetrically around the first line.

17. The loudspeaker according to claim 16, characterized in that The plurality of driving components are two driving components, and the two driving components are axially symmetrically distributed relative to a second axis, and the second axis intersects with the first connecting line and is perpendicular to the first connecting line.

18. The loudspeaker according to any one of claims 1 to 17, characterized in that: The fixing bracket is arranged in a ring shape and is located outside the outer periphery of the voice coil.

19. The loudspeaker according to any one of claims 1 to 18, characterized in that: The vibration member includes a diaphragm and a dome, the outer periphery of the diaphragm is fixedly arranged on the fixed bracket, and the dome is fixedly arranged on the diaphragm so that the dome and the diaphragm vibrate; the voice coil is connected to the diaphragms or the domes of the two vibration members.

20. The loudspeaker according to any one of claims 1 to 19, characterized in that: The loudspeaker further comprises a magnetic circuit assembly, wherein the magnetic circuit assembly is mounted on the fixing bracket and is spaced apart between the two vibrating members in the first direction, and the voice coil is located in the magnetic field formed by the magnetic circuit assembly.

21. An electronic device, characterized in that: Comprising the loudspeaker as claimed in any one of claims 1 to 20.

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