Audio equipment

Abstract

The present invention discloses an audio device, which includes a speaker, an input module and a control module. The speaker includes a magnetic circuit system and a vibration system. The magnetic circuit system is provided with a magnetic gap. The vibration system includes a diaphragm and a voice coil. The diaphragm is connected to one end of the voice coil and is arranged opposite to the magnetic circuit system. The other end of the voice coil is inserted in the magnetic gap. The voice coil has a first coil segment and a second coil segment. The first coil segment and the second coil segment are arranged in sequence along the axial direction of the magnetic gap, and the current direction in the first coil segment is opposite to the current direction in the second coil segment. The input module is electrically connected to the voice coil, and the input module is used to input current to the voice coil. The control module is electrically connected to the input module, and the control module is used to control the input module to switch the current size. The present invention aims to provide an audio device that can eliminate the reverse electromotive force of the voice coil, and the audio device can effectively reduce distortion, improve loudness, and improve subjective listening quality.

Description

Technical Field

[0001] The present invention relates to the technical field of electro-acoustic conversion, and in particular to an audio device. Background Art

[0002] With the rapid development of science and technology, people have higher and higher requirements for the sound quality of audio equipment. The sound-generating components in audio equipment are affected by the appearance and structure of electronic equipment, and their size is getting smaller and smaller. As an important and indispensable functional component of electronic equipment, the sound-generating component uses a magnetic circuit system to drive the voice coil to vibrate, so that the sound-generating component radiates more sound outward. However, in related technologies, when current is passed through the voice coil of the sound-generating component, a reverse electromotive force is generated, which causes distortion in the sound-generating component and reduces the loudness and subjective listening quality of the sound-generating component. Summary of the invention

[0003] The main purpose of the present invention is to provide an audio device, aiming to provide an audio device that can eliminate the reverse electromotive force of the voice coil, and the audio device can effectively reduce distortion, increase loudness, and improve subjective listening quality.

[0004] To achieve the above object, the present invention provides an audio device, the audio device comprising:

[0005] A loudspeaker, the loudspeaker comprising a magnetic circuit system and a vibration system, the magnetic circuit system being provided with a magnetic gap, the vibration system comprising a diaphragm and a voice coil, the diaphragm being connected to one end of the voice coil and being arranged opposite to the magnetic circuit system, the other end of the voice coil being inserted into the magnetic gap, the voice coil comprising a first coil segment and a second coil segment, the first coil segment and the second coil segment being arranged in sequence along the axial direction of the magnetic gap, and a current direction in the first coil segment being opposite to a current direction in the second coil segment;

[0006] an input module, the input module being electrically connected to the voice coil and configured to input current to the voice coil; and

[0007] A control module is electrically connected to the input module, and is used to control the input module to switch the current size.

[0008] In one embodiment, the input module is used to input a first current and a second current into the voice coil, and the first current is smaller than the second current;

[0009] The control module is used to control the input module to switch between the first current and the second current, so that the speaker has a low power consumption mode or a high-quality sound effect mode.

[0010] In one embodiment, the control module is provided with an adjustment gear, and the adjustment gear is used to adjust the first current and the second current input by the input module to the voice coil.

[0011] In one embodiment, the control module is provided with a stepless adjustment structure, and the stepless adjustment structure is used to adjust the first current and the second current input by the input module to the voice coil.

[0012] In one embodiment, the voice coil comprises a voice coil tube and a voice coil wire wound around the voice coil tube, one end of the voice coil tube is connected to the diaphragm, the other end of the voice coil tube is inserted into the magnetic gap, and the voice coil wire forms the first coil segment and the second coil segment along the axial direction of the voice coil tube;

[0013] The input module is electrically connected to the voice coil wire.

[0014] In one embodiment, adjacent ends of the first coil segment and the second coil segment are connected, and a winding direction of the first coil segment along the circumference of the voice coil tube is opposite to a winding direction of the second coil segment along the circumference of the voice coil tube.

[0015] In one embodiment, the magnetic circuit system includes a central magnetic circuit portion and a side magnetic circuit portion, wherein the side magnetic circuit portion is arranged outside the central magnetic circuit portion and is spaced apart from the central magnetic circuit portion to define the magnetic gap.

[0016] In one embodiment, the central magnetic circuit portion includes a first central washer, a central magnet, and a second central washer, and the first central washer, the central magnet, and the second central washer are sequentially stacked along the axial direction of the magnetic gap;

[0017] The side magnetic circuit part includes a first side washer, a side magnet and a second side washer, and the first side washer, the side magnet and the second side washer are sequentially stacked along the axial direction of the magnetic gap;

[0018] At least part of the first coil segment corresponds to the first center washer and the first side washer, and at least part of the second coil segment corresponds to the second center washer and the second side washer.

[0019] In one embodiment, the first center washer and the first side washer have opposite magnetic poles at one end adjacent to the magnetic gap, and the second center washer and the second side washer have opposite magnetic poles at one end adjacent to the magnetic gap.

[0020] And / or, the first center washer and the second center washer have opposite magnetic poles at one end adjacent to the magnetic gap, and the first side washer and the second side washer have opposite magnetic poles at one end adjacent to the magnetic gap.

[0021] In one embodiment, the speaker further comprises a basin frame, and the basin frame is provided with a mounting cavity;

[0022] The magnetic circuit system is arranged in the installation cavity, and the diaphragm is connected to the basin frame and arranged opposite to the magnetic circuit system.

[0023] In one embodiment, the basin frame includes a bottom wall and a side wall arranged at the periphery of the bottom wall, the side wall and the bottom wall enclose the installation cavity, the magnetic circuit system is arranged on the bottom wall, and the periphery of the diaphragm is connected to the side wall to enclose a vibration space;

[0024] The bottom wall is also provided with a pressure relief hole connected to the vibration space.

[0025] In one embodiment, the speaker further includes a centering support plate, which is disposed in the installation cavity and connected to the voice coil.

[0026] In one embodiment, the bottom wall is provided with a groove, the magnetic circuit system is arranged on the bottom wall and covers the notch of the groove, and the magnetic gap is connected to the groove, the centering support plate is arranged in the groove and connected to the voice coil.

[0027] In one embodiment, a connecting platform is provided on the side wall of the groove, one end of the centering support is connected to the connecting platform, and the other end of the centering support is connected to the voice coil;

[0028] And / or, a fixing platform is protruding from the side wall, and the periphery of the diaphragm is connected to the fixing platform.

[0029] The audio device of the technical solution of the present invention is provided with a speaker, an input module and a control module, so that the input module is electrically connected to the voice coil of the speaker to input current to the voice coil, and the input module is controlled by the control module to switch the current size, so as to realize the switching control of different modes; at the same time, by setting a magnetic gap in the magnetic circuit system and inserting the voice coil of the vibration system into the magnetic gap, the magnetic circuit system generates a strong magnetic field in the magnetic gap, thereby increasing the driving force on the voice coil, so that the voice coil drives the diaphragm to vibrate and produce sound; further, by forming a first coil segment and a second coil segment on the voice coil, the first coil segment and the second coil segment are arranged in sequence along the axial direction of the magnetic gap, and the current direction in the first coil segment is opposite to the current direction in the second coil segment, so that the first coil segment and the second coil segment are used to generate induced electromotive forces of equal size and opposite direction in the magnetic gap, so that the two induced electromotive forces will cancel each other out. Compared with the traditional sound-generating device, when the same current is input, the present application can effectively reduce distortion, improve the electroacoustic conversion efficiency, and make the subjective listening loudness greater. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the connection of an audio device in one embodiment of the present invention;

[0032] Figure 2 is a cross-sectional schematic diagram of a loudspeaker according to an embodiment of the present invention;

[0033] Figure 3 is a cross-sectional schematic diagram of a loudspeaker in another embodiment of the present invention;

[0034] Figure 4 It is a cross-sectional schematic diagram of the cooperation between the magnetic circuit system and the voice coil of the loudspeaker in one embodiment of the present invention;

[0035] Figure 5 A schematic diagram of the structure of a voice coil in one embodiment of the present invention;

[0036] Figure 6 for Figure 5 Schematic diagram of the cross section of the midrange coil.

[0037] Description of Figure Numbers:

[0038] Label name Label name 100 speaker 223 Second Center Wash 1 Basin rack 224 Mounting holes 11 Mounting cavity 23 Side magnetic circuit 12 bottom wall 231 First Edge Wash 121 Pressure relief hole 232 Edge magnet 122 Mounting Column 233 Second side wash 123 Mounting table 3 Vibration system 124 Mounting slot 31 Diaphragm 125 Avoidance slot 32 Voice Coil 126 Grooves 321 Voice Coil Tube 127 Connection Station 322 Voice Coil Cable 13 Sidewall 323 First coil segment 131 Fixed platform 324 Second coil segment 2 Magnetic circuit system 4 Centering support piece 21 Magnetic gap 500 Input Module 22 Central magnetic circuit 600 Control Module 221 First Center Wash 700 Audio equipment 222 Center magnet

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0043] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] The present invention provides an audio device 700 .

[0045] Please refer to Figures 1 to 6 As shown, in an embodiment of the present invention, the audio device 700 includes a speaker 100, an input module 500 and a control module 600, wherein the speaker 100 includes a magnetic circuit system 2 and a vibration system 3, the magnetic circuit system 2 is provided with a magnetic gap 21, the vibration system 3 includes a diaphragm 31 and a voice coil 32, the diaphragm 31 is connected to one end of the voice coil 32 and is arranged opposite to the magnetic circuit system 2, the other end of the voice coil 32 is inserted into the magnetic gap 21, the voice coil 32 has a first coil segment 323 and a second coil segment 324, the first coil segment 323 and the second coil segment 324 are arranged in sequence along the axial direction of the magnetic gap 21, and the current direction in the first coil segment 323 is opposite to the current direction in the second coil segment 324, the input module 500 is electrically connected to the voice coil 32, the input module 500 is used to input current to the voice coil 32, the control module 600 is electrically connected to the input module 500, and the control module 600 is used to control the input module 500 to switch the current size.

[0046] In this embodiment, the control module 600 may be a control unit or a control center or a control circuit or a circuit board with an integrated control program of the audio device 700. The input module 500 may be an input terminal or a switching circuit or a switching switch. By setting the input module 500, the input module 500 is used to input a circuit to the voice coil 32 of the speaker 100, so as to introduce an external current into the magnetic field formed by the magnetic circuit system 2 in the speaker 100 through the input module 500 and the voice coil 32, so as to convert the electrical signal in the voice coil 32 into a mechanical operation that drives the voice coil 32 to vibrate, so that the voice coil 32 drives the diaphragm 31 to make a sound, and converts the mechanical operation into a sound signal.

[0047] It is understandable that the signal input into the input module 500 can be obtained by merging the left and right channel signals through an algorithm, or the uncoded signal can be input separately according to the left and right channels, which is not limited here. In this embodiment, the control module 600 controls the input module 500 to switch the current size, so that the audio device 700 can be in different modes, so that the audio device 700 can adjust different modes as needed, further improving the user experience.

[0048] In this embodiment, the magnetic circuit system 2 and the vibration system 3 constitute the main structure of the speaker 100. A magnetic gap 21 is provided in the magnetic circuit system 2, and the voice coil 32 of the vibration system 3 is inserted in the magnetic gap 21. When the voice coil 32 is connected to an external power source through the input module 500, the voice coil 32 is used to transfer electrical energy to the magnetic gap 21 of the magnetic circuit system 2, and under the action of the magnetic lines of force generated by the magnetic gap 21, the voice coil 32 moves up and down, that is, the magnetic field generated by the magnetic circuit system 2 is used to convert electrical energy into mechanical energy, thereby causing the voice coil 32 to vibrate.

[0049] In this embodiment, after the voice coil 32 disposed in the magnetic gap 21 receives an external changing alternating current signal, it is driven by the magnetic field force of the magnetic circuit system 2 to make a reciprocating motion of cutting the magnetic lines of force, causing the voice coil 32 to move up and down, and driving the diaphragm 31 of the vibration system 3 to vibrate and produce sound.

[0050] It can be understood that the magnetic circuit system 2 is used to form a magnetic field. By setting a magnetic gap 21 in the magnetic circuit system 2, the magnetic circuit system 2 forms a strong magnetic field in the magnetic gap 21. In this way, the voice coil 32 is inserted into the magnetic gap 21, so that the strong magnetic field in the magnetic gap 21 provides a driving force for the voice coil 32. By connecting the voice coil 32 in the magnetic gap 21 to an external circuit, after the voice coil 32 receives an external alternating current signal, it moves back and forth to cut the magnetic field lines under the drive of the magnetic field force of the magnetic circuit system 2, so that the voice coil 32 moves up and down.

[0051] Since the current flowing through the voice coil will generate a reverse electromotive force, the reverse electromotive force will hinder the vibration of the voice coil 32. Therefore, after the voice coil 32 is connected to the diaphragm 31, the vibration of the diaphragm 31 will be affected by the reverse electromotive force formed by the voice coil 32, thereby causing distortion of the speaker 100 and reducing the loudness and subjective listening quality of the speaker 100.

[0052] In this embodiment, by arranging the first coil segment 323 and the second coil segment 324 on the voice coil 32, the first coil segment 323 and the second coil segment 324 are arranged in sequence along the axial direction of the magnetic gap 21, and the current direction in the first coil segment 323 is opposite to the current direction in the second coil segment 324. In this way, after the externally changing alternating current signal is introduced into the voice coil 32, the current direction in the first coil segment 323 is opposite to the current direction in the second coil segment 324, so that the first coil segment 323 and the second coil segment 324 generate induced electromotive forces of equal magnitude and opposite directions in the magnetic gap 21, so that the two induced electromotive forces will cancel each other out. Compared with the traditional speaker 100 or the audio device 700, when the same current is input, the speaker 100 in the present application can effectively reduce distortion, thereby improving the electroacoustic conversion efficiency of the speaker 100 and making the subjective listening loudness greater.

[0053] In this embodiment, the vibration system 3 includes a diaphragm 31 and a voice coil 32. The diaphragm 31 has a dome, which is connected to the diaphragm 31 and located at the center of the diaphragm 31. The edge of the diaphragm 31 is connected to the basin frame 1. By connecting the dome to the center of the diaphragm 31, the edge of the diaphragm 31 is connected to the magnetic circuit system 2 or the basin frame 1 of the speaker 100, so that the strength of the center of the diaphragm 31 is improved by using the dome.

[0054] It can be understood that the diaphragm 31 has a folding portion that is convex upward or concave downward, the dome is connected to the inner side of the folding portion of the diaphragm 31, and the outer side of the folding portion of the diaphragm 31 is connected to the magnetic circuit system 2 or the basin frame 1 of the speaker 100, which is not limited here. In this embodiment, the folding portion of the diaphragm 31 can be a folding portion that is concave downward or a folding portion that is convex upward, that is, the folding portion has a U-shaped structure with elastic recovery. In this arrangement, the diaphragm 31 occupies a very small vibration radiation surface on the basis of providing greater compliance, effectively increasing the vibration sound area.

[0055] In this embodiment, the diaphragm 31 and the dome can be processed into an integrated structure using an integrated molding technology. It can be understood that the plane portion of the diaphragm 31 is tightly pressed with the dome, and the outer edge of the diaphragm 31 is coupled with the magnetic circuit system 2 or the basin frame 1 of the speaker 100. The integrated diaphragm 31 is connected through the magnetic circuit system 2 or the basin frame 1 of the speaker 100. The integrated molding technology of the three ensures reliable and durable contact.

[0056] The audio device 700 of the present invention is provided with a speaker 100, an input module 500 and a control module 600, so that the input module 500 is electrically connected to the voice coil 32 of the speaker 100 to input current to the voice coil 32, and the control module 600 controls the input module 500 to switch the current size, thereby realizing switching control of different modes; at the same time, by providing a magnetic gap 21 in the magnetic circuit system 2 and inserting the voice coil 32 of the vibration system 3 into the magnetic gap 21, the magnetic circuit system 2 generates a strong magnetic field in the magnetic gap 21, thereby increasing the driving force on the voice coil 32, so that the voice coil 32 drives the diaphragm 31 to vibrate and produce sound; In a step, a first coil segment 323 and a second coil segment 324 are formed on the voice coil 32, so that the first coil segment 323 and the second coil segment 324 are arranged in sequence along the axial direction of the magnetic gap 21, and the current direction in the first coil segment 323 is opposite to the current direction in the second coil segment 324. In this way, the first coil segment 323 and the second coil segment 324 are used to generate induced electromotive forces of equal magnitude and opposite directions in the magnetic gap 21, so that the two induced electromotive forces will cancel each other out. Compared with traditional sound-generating devices, when the same current is input, the present application can effectively reduce distortion, improve the electroacoustic conversion efficiency, and make the subjective listening louder.

[0057] In one embodiment, the input module 500 is used to input a first current and a second current into the voice coil 32, and the first current is smaller than the second current; the control module 600 is used to control the input module 500 to switch at least between the first current and the second current, so that the speaker 100 has at least a low power consumption mode or a high-quality sound mode.

[0058] In this embodiment, the input module 500 inputs different currents into the voice coil 32, so that different currents in the voice coil 32 drive the diaphragm 31 to produce different vibrations and sounds in the magnetic field formed by the magnetic circuit system 2. It can be understood that the input module 500 inputs a first current and a second current into the voice coil 32, wherein the first current is smaller than the second current. When the control module 600 controls the input module 500 to input a smaller first current into the voice coil 32, the speaker 100 can have a low power consumption mode; when the control module 600 controls the input module 500 to input a larger second current into the voice coil 32, the speaker 100 can have a high-quality sound effect mode.

[0059] It can be understood that the control module 600 controls the input module 500 to switch between at least the first current and the second current, so that the speaker 100 has at least a low power consumption mode or a high-quality sound effect mode. Of course, the input module 500 can input multiple currents to the voice coil 32, each current is between the first current and the second current, so that the control module 600 controls the input module 500 to switch between multiple currents, which is not limited here.

[0060] In order to facilitate user adjustment or operation, the control module 600 is provided with an adjustment gear, and the adjustment gear is used to adjust the first current and the second current input by the input module 500 to the voice coil 32. It can be understood that the adjustment gear can be an adjustment button, an adjustment gear switch or an adjustment knob set on the audio device 700, and the adjustment gear is electrically connected to the control module 600 and the input module 500. The user adjusts the gear to switch the input module 500 between multiple currents and switch the audio device 700 between different modes. Optionally, the adjustment gear includes multiple gears, each gear corresponding to a current value.

[0061] In one embodiment, the control module 600 is provided with a stepless adjustment structure, and the stepless adjustment structure is used to adjust the first current and the second current input by the input module 500 to the voice coil 32. It can be understood that the stepless adjustment structure can be a stepless adjustment button, a stepless adjustment switch or a stepless adjustment knob set on the audio device 700, and the stepless adjustment structure is electrically connected to the control module 600 and the input module 500. The user can switch the input module 500 between multiple currents through the stepless adjustment structure, and switch the audio device 700 between different modes, which is not limited here.

[0062] In one embodiment, the voice coil 32 includes a voice coil tube 321 and a voice coil wire 322 wound around the voice coil tube 321, one end of the voice coil tube 321 is connected to the diaphragm 31, the other end of the voice coil tube 321 is inserted into the magnetic gap 21, and the voice coil wire 322 forms a first coil segment 323 and a second coil segment 324 along the axial direction of the voice coil tube 321; the input module 500 is electrically connected to the voice coil wire 322.

[0063] In this embodiment, if Figure 5 and Figure 6 As shown, the voice coil 32 is arranged in an annular shape, so that after one end of the voice coil 32 is connected to the diaphragm 31, the annular voice coil 32 can drive the diaphragm 31 to vibrate in the circumferential direction, thereby improving the vibration effect of the diaphragm 31 and improving the acoustic performance of the speaker.

[0064] It can be understood that by configuring the voice coil 32 as a voice coil tube 321 and a voice coil wire 322, the voice coil tube 321 is an annular tubular or cylindrical structure, and the voice coil tube 321 provides an installation or support basis for the voice coil wire 322. The voice coil tube 321 can be made of metal or non-metal material. In order to reduce the resistance of the voice coil 32, the voice coil tube 321 can be made of non-metal or non-conductive material, which is not limited here.

[0065] In this embodiment, the voice coil wire 322 can be made of a conductive metal wire, such as a copper wire or an aluminum wire or other conductive metal wire, etc., which is not limited here. It can be understood that the voice coil wire 322 is wound along the circumferential direction of the voice coil tube 321 to be fixed on the voice coil tube 321, and the voice coil wire 322 forms a first coil segment 323 and a second coil segment 324 along the axial direction of the voice coil tube 321.

[0066] Optionally, the voice coil wire 322 may be one or more, which is not limited here. When there is only one voice coil wire 322, the voice coil wire 322 is wound along the circumferential direction of the voice coil tube 321 to form an annular coil, and the annular coil extends along the axial direction of the voice coil tube 321 and is arranged at intervals, that is, the voice coil wire 322 is wound around the voice coil tube 321 in a spiral manner. Figure 5 and Figure 6 The first coil segment 323 and the second coil segment 324 are connected at adjacent ends, and the winding direction of the first coil segment 323 along the circumference of the voice coil tube 321 is opposite to the winding direction of the second coil segment 324 along the circumference of the voice coil tube 321 .

[0067] It can be understood that when there are multiple voice coil wires 322, the multiple voice coil wires 322 can be wound side by side, and the winding directions of the multiple voice coil wires 322 are the same, that is, they are all wound from one end of the voice coil tube 321 at the same time, and the winding method of the multiple voice coil wires 322 is consistent with the winding method of one voice coil wire 322 in the above embodiment. When the plurality of voice coil wires 322 are respectively wound around the two ends of the voice coil tube 321, the plurality of voice coil wires 322 form the first coil segment 323 and the second coil segment 324 at the two ends of the voice coil tube 321, that is, the plurality of voice coil wires 322 can simultaneously form the first coil segment 323 and the second coil segment 324 on the voice coil tube 321 along its axial direction; or, part of the plurality of voice coil wires 322 form the first coil segment 323 on the voice coil tube 321, and another part of the plurality of voice coil wires 322 form the second coil segment 324 on the voice coil tube 321, which is not limited here.

[0068] In one embodiment, the loudspeaker 100 further comprises a frame 1 , which is provided with a mounting cavity 11 ; the magnetic circuit system 2 is disposed in the mounting cavity 11 , and the diaphragm 31 is connected to the frame 1 and is disposed opposite to the magnetic circuit system 2 .

[0069] In this embodiment, if Figure 2 and Figure 3 As shown, the basin frame 1 is used to install, fix and protect the components such as the magnetic circuit system 2 and the vibration system 3 of the speaker 100, that is, the basin frame 1 provides an installation base for the components such as the magnetic circuit system 2 and the vibration system 3. It can be understood that the basin frame 1 can be a shell, box or box body with an installation cavity 11, which is not limited here.

[0070] It can be understood that the basin frame 1 can be a single structure or a split structure, which is not limited here. The installation cavity 11 of the basin frame 1 can be a cavity structure with one end open and the other end closed, or a cavity structure with both ends open, which is not limited here. In this embodiment, the installation cavity 11 of the basin frame 1 can be a cavity structure with one end open and the other end closed, that is, the basin frame 1 is arranged in a groove structure, and components such as the magnetic circuit system 2 and the vibration system 3 are installed in the groove structure. The diaphragm 31 of the vibration system 3 covers the notch of the groove structure and encloses to form a vibration space.

[0071] In one embodiment, the magnetic circuit system 2 includes a central magnetic circuit portion 22 and a side magnetic circuit portion 23 . The side magnetic circuit portion 23 is disposed outside the central magnetic circuit portion 22 and is spaced apart from the central magnetic circuit portion 22 to define a magnetic gap 21 .

[0072] In this embodiment, if Figures 2 to 4 As shown, the central magnetic circuit part 22 and the side magnetic circuit part 23 of the magnetic circuit system 2 are both arranged in the mounting cavity 11 of the basin frame 1, and the central magnetic circuit part 22 and the side magnetic circuit part 23 of the magnetic circuit system 2 are spaced and arranged relative to each other to define a magnetic gap 21. It can be understood that the side magnetic circuit part 23 is arranged outside the central magnetic circuit part 22, and the side magnetic circuit part 23 and the central magnetic circuit part 22 are spaced to define the magnetic gap 21, so that a strong magnetic field is formed in the magnetic gap 21 by using the central magnetic circuit part 22 and the side magnetic circuit part 23 to increase the driving force of the voice coil 32 inserted in the magnetic gap 21. Optionally, the side magnetic circuit part 23 is arranged around the central magnetic circuit part 22, so that the magnetic gap 21 is arranged in an annular shape, and the voice coil 32 is an annular voice coil and is inserted in the annular magnetic gap 21, which is not limited here.

[0073] It can be understood that the central magnetic circuit part 22 of the magnetic circuit system 2 can be an integral structure, and the central magnetic circuit part 22 can be selected as a plate-like structure, which is not limited here. Of course, in other embodiments, the central magnetic circuit part 22 can also be a split structure, for example, the central magnetic circuit part 22 is composed of multiple parts, and the multiple parts are surrounded to form a central magnetic circuit part 22 with a hollow structure in the middle. The side magnetic circuit part 23 of the magnetic circuit system 2 can be an integral structure, and the side magnetic circuit part 23 can be selected as an annular structure, and the central magnetic circuit part 22 is located in the annular side magnetic circuit part 23 and is spaced from the inner circle of the annular side magnetic circuit part 23, which is not limited here. Of course, in other embodiments, the side magnetic circuit part 23 can also be a split structure, for example, the side magnetic circuit part 23 is composed of multiple parts, and the multiple parts are spaced and arranged around the central magnetic circuit part 22.

[0074] In one embodiment, the magnetic circuit system 2 is arranged in a square shape, and the central magnetic circuit portion 22 has a first long side portion and a first short side portion arranged in sequence. The first long side portion and the first short side portion can be an integral long side or short side, or can be separately arranged. For example, the first long side portion and the first short side portion of the central magnetic circuit portion 22 are completely interrupted, which is not limited here. It can be understood that the length dimension of the first long side portion and the length dimension of the first short side portion can be the same or different, which is not limited here.

[0075] The side magnetic circuit portion 23 includes a second long side portion and a second short side portion arranged in sequence, and the second long side portion and the second short side portion can be the long side or short side of a ring-shaped whole, or can be separately arranged, for example, the second long side portion and the second short side portion of the side magnetic circuit portion 23 are completely interrupted. In this embodiment, the length dimension of the second long side portion and the length dimension of the second short side portion can be the same or different, and is not limited here.

[0076] Optionally, the side magnetic circuit portion 23 and the center magnetic circuit portion 22 of the magnetic circuit system 2 are arranged separately, in which case the first long side portion of the center magnetic circuit portion 22 corresponds to the second long side portion of the side magnetic circuit portion 23 and is arranged at intervals, and the first short side portion of the center magnetic circuit portion 22 corresponds to the second short side portion of the side magnetic circuit portion 23 and is arranged at intervals, which is not limited here.

[0077] In one embodiment, the central magnetic circuit portion 22 includes a first central washer 221, a central magnet 222 and a second central washer 223, and the first central washer 221, the central magnet 222 and the second central washer 223 are stacked in sequence along the axial direction of the magnetic gap 21; the side magnetic circuit portion 23 includes a first side washer 231, a side magnet 232 and a second side washer 233, and the first side washer 231, the side magnet 232 and the second side washer 233 are stacked in sequence along the axial direction of the magnetic gap 21; at least part of the first coil segment 323 corresponds to the first central washer 221 and the first side washer 231, and at least part of the second coil segment 324 corresponds to the second central washer 223 and the second side washer 233.

[0078] In this embodiment, the structures of the central magnetic circuit portion 22 and the side magnetic circuit portion 23 may be the same or different, which is not limited here. Figures 2 to 4 As shown, the central magnetic circuit portion 22 includes a first central washer 221, a central magnet 222 and a second central washer 223 which are stacked in sequence, and the side magnetic circuit portion 23 includes a first side washer 231, a side magnet 232 and a second side washer 233 which are stacked in sequence, and the first central washer 221, the central magnet 222 and the second central washer 223 are respectively opposite to and spaced from the first side washer 231, the side magnet 232 and the second side washer 233, and are all stacked in sequence along the axial direction of the magnetic gap 21.

[0079] It can be understood that the central magnet 222 of the central magnetic circuit part 22 and the side magnet 232 of the side magnetic circuit part 23 form a magnetic field with each other and form annular magnetic flux lines, so that the first central washer 221 and the second central washer 223 of the central magnetic circuit part 22 and the first side washer 231 and the second side washer 233 of the side magnetic circuit part 23 are magnetized, thereby forming magnetic poles with different polarities.

[0080] In the present embodiment, the first center washer 221 and the second center washer 223 may be selected as magnetic conductive plates, and the first side washer 231 and the second side washer 233 may be selected as magnetic conductive plates, which have a magnetic gathering effect and can have a uniform effect on the magnetic field generated by the center magnet 222 and the side magnet 232. Optionally, the center magnet 222 and the side magnet 232 may be selected as permanent magnets. It is understandable that the shape contour of the center magnet 222 may be the same as or different from the shape contour of the first center washer 221 and the second center washer 223, which is not limited here. The shape contour of the side magnet 232 may be the same as or different from the shape contour of the first side washer 231 and the second side washer 233, which is not limited here.

[0081] like Figure 2 and Figure 4 As shown, at least part of the first coil segment 323 of the voice coil 32 corresponds to the first center washer 221 and the first side washer 231 , and at least part of the second coil segment 324 of the voice coil 32 corresponds to the second center washer 223 and the second side washer 233 .

[0082] With such an arrangement, the first coil segment 323 can generate an induced electromotive force in a first direction under the action of the magnetic field generated by the magnetic circuit system 2 and the polarized first center washer 221 and the first side washer 231, while the second coil segment 324 can generate an induced electromotive force in the opposite direction to the first direction under the action of the magnetic field generated by the magnetic circuit system 2 and the polarized second center washer 223 and the second side washer 233. At this time, the induced electromotive force of the first coil segment 323 is equal to the induced electromotive force of the second coil segment 324 in magnitude but opposite in direction, so that the two induced electromotive forces cancel each other out. Therefore, when the same current is input, distortion can be effectively reduced, the electroacoustic conversion efficiency can be improved, and the subjective listening loudness can be increased.

[0083] In one embodiment, if Figures 2 to 4 As shown, the magnetic poles of the first central washer 221 and the first side washer 231 at one end adjacent to the magnetic gap 21 have opposite polarities, and the magnetic poles of the second central washer 223 and the second side washer 233 at one end adjacent to the magnetic gap 21 have opposite polarities.

[0084] It can be understood that if the magnetic pole polarity of the first center washer 221 of the central magnetic circuit part 22 is the N pole, the magnetic pole polarity of the first side washer 231 of the side magnetic circuit part 23 is the S pole; if the magnetic pole polarity of the first center washer 221 of the central magnetic circuit part 22 is the S pole, the magnetic pole polarity of the first side washer 231 of the side magnetic circuit part 23 is the N pole.

[0085] Of course, if the magnetic pole polarity of the second center washer 223 of the central magnetic circuit part 22 is the N pole, the magnetic pole polarity of the second side washer 233 of the side magnetic circuit part 23 is the S pole; if the magnetic pole polarity of the second center washer 223 of the central magnetic circuit part 22 is the S pole, the magnetic pole polarity of the second side washer 233 of the side magnetic circuit part 23 is the N pole.

[0086] In one embodiment, if Figures 2 to 4 As shown, the magnetic poles of the first center washer 221 and the second center washer 223 at one end adjacent to the magnetic gap 21 have opposite polarities, and the magnetic poles of the first side washer 231 and the second side washer 233 at one end adjacent to the magnetic gap 21 have opposite polarities.

[0087] It can be understood that if the magnetic pole polarity of the first center washer 221 of the central magnetic circuit part 22 is the N pole, the magnetic pole polarity of the second center washer 223 of the central magnetic circuit part 22 is the S pole; if the magnetic pole polarity of the first center washer 221 of the central magnetic circuit part 22 is the S pole, the magnetic pole polarity of the second center washer 223 of the central magnetic circuit part 22 is the N pole.

[0088] Of course, if the magnetic pole polarity of the first side washer 231 of the side magnetic circuit part 23 is N pole, the magnetic pole polarity of the second side washer 233 of the side magnetic circuit part 23 is S pole; if the magnetic pole polarity of the first side washer 231 of the side magnetic circuit part 23 is S pole, the magnetic pole polarity of the second side washer 233 of the side magnetic circuit part 23 is N pole.

[0089] In one embodiment, if Figures 2 to 4 As shown, the width of the magnetic gap 21 is defined as the distance between the central magnetic path portion 22 and the side magnetic path portion 23. Optionally, the width of the magnetic gap 21 ranges from 0.2 mm to 0.5 mm.

[0090] It is understandable that the width of the magnetic gap 21 is set in the range of 0.2 mm to 0.5 mm, so that the magnetic field strength generated by the magnetic circuit system 2 in the magnetic gap 21 can be ensured, and the voice coil 32 can also be ensured not to be affected in the magnetic gap 21. Optionally, the width of the magnetic gap 21 is 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc., which is not limited here.

[0091] In one embodiment, if Figures 2 to 4As shown, the length of the first coil segment 323 along the axial direction of the magnetic gap 21 is greater than or equal to twice the thickness of the first center washer 221 or the first side washer 231. It can be understood that the length of the first coil segment 323 along the axial direction of the magnetic gap 21 is the length of the voice coil wire 322 wound around the coil along the axial direction of the voice coil tube 321, and the thickness of the first center washer 221 or the first side washer 231 is the thickness of the voice coil tube 321 in the direction of inserting the magnetic gap 21. Optionally, the thickness of the first center washer 221 is the same as the thickness of the first side washer 231.

[0092] In this embodiment, the length of the first coil segment 323 along the axial direction of the magnetic gap 21 is set to be greater than or equal to twice the thickness of the first center washer 221 or the first side washer 231, thereby ensuring the length of the first coil segment 323 within the magnetic gap 21, so as to ensure that the first coil segment 323 in the voice coil 32 generates sufficient driving force.

[0093] In one embodiment, if Figures 2 to 4 As shown, and / or, the length of the second coil segment 324 along the axial direction of the magnetic gap 21 is greater than or equal to twice the thickness of the second center washer 223 or the second side washer 233. It can be understood that the length of the second coil segment 324 along the axial direction of the magnetic gap 21 is the length of the voice coil wire 322 wound around the coil along the axial direction of the voice coil tube 321, and the thickness of the second center washer 223 or the second side washer 233 is the thickness of the voice coil tube 321 in the direction of inserting the magnetic gap 21. Optionally, the thickness of the second center washer 223 is the same as the thickness of the second side washer 233.

[0094] In this embodiment, the length of the second coil segment 324 along the axial direction of the magnetic gap 21 is set to be greater than or equal to twice the thickness of the second center washer 223 or the second side washer 233, thereby ensuring the length of the second coil segment 324 within the magnetic gap 21, so as to ensure that the second coil segment 324 in the voice coil 32 generates sufficient driving force.

[0095] Optionally, the thickness of the first center washer 221 is the same as the thickness of the second center washer 223, and the thickness of the first side washer 231 is the same as the thickness of the second side washer 233. The length of the first coil segment 323 along the axial direction of the magnetic gap 21 is the same as the length of the second coil segment 324 along the axial direction of the magnetic gap 21, so that the induced electromotive force generated by the first coil segment 323 and the second coil segment 324 is equal in magnitude and opposite in direction.

[0096] In one embodiment, if Figures 2 to 4As shown, the thickness of the central magnet 222 is greater than or equal to 4 times the thickness of the first central washer 221 or the second central washer 223, and the thickness of the side magnet 232 is greater than or equal to 4 times the thickness of the first side washer 231 or the second side washer 233. It can be understood that such an arrangement can ensure that the central magnet 222 and the side magnet 232 in the magnetic circuit system 2 can generate sufficient magnetic field strength, so that the first central washer 221, the second central washer 223, the first side washer 231 and the second side washer 233 can be polarized.

[0097] In one embodiment, the basin frame 1 includes a bottom wall 12 and a side wall 13 arranged on the periphery of the bottom wall 12, the side wall 13 and the bottom wall 12 enclose an installation cavity 11, the magnetic circuit system 2 is arranged on the bottom wall 12, the periphery of the diaphragm 31 is connected to the side wall 13, and encloses a vibration space; the bottom wall 12 is also provided with a pressure relief hole 121 connected to the vibration space.

[0098] In this embodiment, if Figure 2 and Figure 3 As shown, the bottom wall 12 and the side wall 13 of the basin frame 1 enclose an installation cavity 11 with a groove structure, and the central magnetic circuit part 22 and the side magnetic circuit part 23 of the magnetic circuit system 2 are both arranged on the bottom wall 12. At this time, the side magnetic circuit part 23 is located between the central magnetic circuit part 22 and the side wall 13.

[0099] It is understandable that the periphery of the diaphragm 31 is connected to the side wall 13 and encloses a vibration space. In order to balance the air pressure in the vibration space when the diaphragm 31 vibrates, the bottom wall 12 is further provided with a pressure relief hole 121 connected to the vibration space.

[0100] In one embodiment, the bottom wall 12 is provided with a mounting column 122, and the magnetic circuit system 2 is further provided with a mounting hole 224 spaced apart from the magnetic gap 21. The mounting column 122 is passed through the mounting hole 224, and the pressure relief hole 121 is provided through the bottom wall 12 and the mounting column 122.

[0101] like Figure 2 and Figure 3 As shown, by protruding a mounting post 122 on the bottom wall 12 and opening a mounting hole 224 in the central magnetic circuit portion 22 of the magnetic circuit system 2, the mounting post 122 can be conveniently used to locate and install the magnetic circuit system 2, that is, the mounting post 122 is inserted into the mounting hole 224. It can be understood that the mounting hole 224 is spaced apart from the magnetic gap 21, and the pressure relief hole 121 is set through the bottom wall 12 and the mounting post 122.

[0102] In one embodiment, the bottom wall 12 is provided with a mounting column 122 and a mounting platform 123 arranged around the mounting column 122, the mounting platform 123 is provided with a mounting groove 124, the magnetic circuit system 2 is also provided with a mounting hole 224 spaced apart from the magnetic gap 21, the mounting column 122 is passed through the mounting hole 224, part of the magnetic circuit system 2 is accommodated and limited in the mounting groove 124, and the bottom wall 12 of the mounting groove 124 is provided with an avoidance groove 125 corresponding to the magnetic gap 21.

[0103] In this embodiment, if Figure 2 and Figure 3 As shown, by setting a mounting column 122 and a mounting platform 123 on the bottom wall 12, the mounting platform 123 is set around the mounting column 122, and a mounting groove 124 is provided on the mounting platform 123, so that the central magnetic circuit part 22 and the side magnetic circuit part 23 of the limiting magnetic circuit system 2 are installed by utilizing the mounting groove 124 and the mounting column 122.

[0104] It is understandable that a mounting hole 224 is provided in the central magnetic circuit portion 22 of the magnetic circuit system 2, so that the magnetic circuit system 2 can be conveniently positioned and installed using the mounting post 122, that is, the mounting post 122 is inserted into the mounting hole 224. It is understandable that the mounting hole 224 is spaced apart from the magnetic gap 21, and the pressure relief hole 121 is provided through the bottom wall 12 and the mounting post 122.

[0105] In this embodiment, an avoidance groove 125 is provided on the bottom wall 12 of the mounting groove 124 corresponding to the magnetic gap 21 , so that the avoidance groove 125 provides an avoidance space for the voice coil 32 to vibrate in the magnetic gap 21 .

[0106] In one embodiment, the loudspeaker 100 further includes a centering support 4 , which is disposed in the mounting cavity 11 and connected to the voice coil 32 .

[0107] In this embodiment, if Figure 3 As shown, one end of the centering support 4 is connected to the basin frame 1, and the other end of the centering support 4 is connected to the voice coil 32. It can be understood that the centering support 4 is provided with an inner pad, and the lead portion of the voice coil 32 is welded to the inner pad. It can be understood that by providing the centering support 4, the centering support 4 is used to effectively avoid the swing phenomenon of the voice coil 32 during the vibration process, and the centering support 4 is used to realize the connection and conduction between the voice coil 32 and the external circuit. Optionally, the centering support 4 can be an integral structure, or can include multiple structures.

[0108] In this embodiment, an inner pad and an outer pad are provided on the centering support plate 4, so that the lead portion of the voice coil 32 is welded to the inner pad, and the outer pad is electrically connected to the input module 500. In this way, the centering support plate 4 can be used to realize the electrical connection between the voice coil 32 and the external circuit, effectively avoiding the problem of lead breakage of the voice coil 32 during vibration, resulting in poor circuit conduction, and avoiding swinging of the voice coil 32 during vibration, thereby further improving the acoustic performance of the speaker 100.

[0109] It can be understood that the centering support 4 includes an inner fixing portion, an outer fixing portion and an elastic portion connected to the inner fixing portion and the outer fixing portion respectively, and the inner fixing portion is provided with an inner solder pad, so that the centering support 4 can be fixed to the magnetic circuit system 2 or the basin frame 1 through the outer fixing portion, thereby improving the installation stability of the centering support 4. At the same time, the elastic portion can elastically deform when the voice coil 32 vibrates, which can not only realize the conduction between the voice coil 32 and the external circuit through the centering support 4, but also avoid the problem of poor conduction caused by the breakage of the voice coil lead wire during the vibration of the voice coil 32.

[0110] Of course, the centering support plate 4 can also be replaced by an auxiliary diaphragm, that is, the auxiliary diaphragm has a folded ring structure. In this way, the auxiliary diaphragm and the diaphragm 31 can cooperate to effectively prevent the voice coil 32 from swinging during vibration, causing polarization or resonance of the diaphragm 31.

[0111] The present invention sets an installation cavity 11 in the basin frame 1, sets the magnetic circuit system 2, the vibration system 3 and the centering support plate 4 in the installation cavity 11 of the basin frame 1, thereby realizing the installation and fixation of the magnetic circuit system 2, the vibration system 3 and the centering support plate 4; sets a magnetic gap 21 in the magnetic circuit system 2, and inserts the voice coil 32 in the magnetic gap 21, so that the magnetic circuit system 2 generates a strong magnetic field in the magnetic gap 21, thereby increasing the driving force on the voice coil 32, so that the voice coil 32 drives the diaphragm 31 to vibrate and produce sound, and sets the centering support plate 4 so that the centering support plate 4 is connected to the voice coil 32, so that the centering support plate 4 is used to effectively prevent the voice coil 32 from swinging during the vibration process, thereby improving the speaker. 100; at the same time, a first coil segment 323 and a second coil segment 324 are formed on the voice coil 32, so that the first coil segment 323 and the second coil segment 324 are arranged in sequence along the axial direction of the magnetic gap 21, and the current direction in the first coil segment 323 is opposite to the current direction in the second coil segment 324, so that the first coil segment 323 and the second coil segment 324 are used to generate induced electromotive forces of equal magnitude and opposite directions in the magnetic gap 21, so that the two induced electromotive forces will cancel each other out. Compared with traditional sound-generating devices, when the same current is input, the present application can effectively reduce distortion, improve the electroacoustic conversion efficiency, and make the subjective listening louder.

[0112] In one embodiment, the speaker 100 may also eliminate the centering support 4, and add magnetic fluid in the magnetic gap 21 to replace the centering function of the centering support 4, thereby greatly reducing the thickness in the axial direction. At the same time, by increasing the width of the fold of the diaphragm 31, it is ensured that more compliance is provided to the speaker 100, compensating for the problem caused by the removal of the centering support.

[0113] In one embodiment, the bottom wall 12 is provided with a groove 126 , the magnetic circuit system 2 is provided on the bottom wall 12 and covers the notch of the groove 126 , and the magnetic gap 21 is connected to the groove 126 , the centering support plate 4 is provided in the groove 126 and connected to the voice coil 32 .

[0114] In this embodiment, if Figure 3 As shown, the side wall 13 of the basin frame 1 is arranged on the periphery of the bottom wall 12, and the side wall 13 and the bottom wall 12 enclose the installation cavity 11. The periphery of the diaphragm 31 is connected to the side wall 13 and encloses a vibration space; the bottom wall 12 is also provided with a pressure relief hole 121 connected to the vibration space.

[0115] It can be understood that the bottom wall 12 and the side wall 13 of the basin frame 1 enclose the installation cavity 11 of the groove structure, and the magnetic circuit system 2 is arranged on the bottom wall 12. It can be understood that in order to facilitate the installation and fixing of the centering support plate 4, the bottom wall 12 is provided with a groove 126, so that the magnetic circuit system 2 is arranged on the bottom wall 12 and covers the notch of the groove 126, that is, the magnetic circuit system 2 cooperates with the groove 126 to form an installation space, at this time, the magnetic gap 21 is connected with the groove 126, the centering support plate 4 is arranged in the groove 126, and is connected to the voice coil 32.

[0116] It is understandable that the periphery of the diaphragm 31 is connected to the side wall 13 and encloses a vibration space. In order to balance the air pressure in the vibration space when the diaphragm 31 vibrates, the bottom wall 12 is further provided with a pressure relief hole 121 connected to the vibration space.

[0117] In one embodiment, if Figure 3 As shown, a connecting platform 127 is provided on the side wall of the groove 126, one end of the centering support plate 4 is connected to the connecting platform 127, and the other end of the centering support plate 4 is connected to the voice coil 32. It can be understood that by providing the connecting platform 127 with a step structure on the side wall of the groove 126, it is convenient to install and fix the centering support plate 4, so that one end of the centering support plate 4 is connected to the connecting platform 127, and the other end of the centering support plate 4 is connected to one end of the voice coil 32 passing through the magnetic gap 21.

[0118] In one embodiment, if Figure 2 and Figure 3 As shown, the side wall 13 is convexly provided with a fixing platform 131, and the periphery of the diaphragm 31 is connected to the fixing platform 131. It can be understood that such a configuration can effectively improve the installation stability of the diaphragm 31. Optionally, the diaphragm 31 can be connected and fixed to the fixing platform 131 by means of adhesive.

[0119] In this embodiment, the fixing platform 131 may be a step structure formed at the end of the side wall 13 , or may be a boss structure protruding from one side of the side wall 13 facing the installation cavity 11 , which is not limited here.

[0120] The first coil segment 323 and the second coil segment 324 of the voice coil 32 in the speaker 100 of the audio device 700 of the present invention can be wound with the same voice coil wire 322, wherein the voice coil wire 322 is wound in the opposite direction in the middle of the voice coil tube 321, i.e., the middle position of the center magnet 222 and the side magnet 232, i.e., Figure 5 and Figure 6 As shown, when the current in the first coil segment 323 of the upper voice coil wire 322 is perpendicular to the paper surface and outward, the current in the second coil segment 324 is perpendicular to the paper surface and inward.

[0121] It can be understood that the polarities of the first center washer 221 and the first side washer 231 as well as the second center washer 223 and the second side washer 233 are opposite at the left and right ends of the magnetic gap 21. Figures 2 to 4 As shown, when the first side washer 231 located at the left end of the magnetic gap 21 is the S pole, the first center washer 221 located at the right end of the magnetic gap 21 is the N pole, and the magnetic induction line at the upper end of the magnetic gap 21 is from right to left, according to the left-hand rule, the driving force generated by the first coil segment 323 is in an upward direction; the second side washer 233 located at the left end of the magnetic gap 21 is the N pole, the second center washer 223 located at the right end of the magnetic gap 21 is the S pole, and the magnetic induction line at the lower end of the magnetic gap 21 is from left to right, according to the left-hand rule, the driving force generated by the second coil segment 324 is in an upward direction. The first coil segment 323 and the second coil segment 324 are subjected to the same force direction, and at the same time drive the voice coil tube 321 to move up and down, thereby pushing the diaphragm to radiate sound outward. Compared with the conventional loudspeaker magnetic circuit system, this design can achieve higher electroacoustic conversion efficiency and produce greater loudness at the same power.

[0122] When the first coil segment 323 and the second coil segment 324 move upward to the highest point of the stroke, at this time, in the conventional speaker design, the voice coil tube 321 will be driven downward by the folding ring and the centering support of the diaphragm 31, prompting the voice coil tube 321 to move downward, but at this time according to the left-hand rule, the voice coil 32 is actually driven upward, but in the process of downward movement, the magnetic flux lines are cut, and an induced electromotive force opposite to the current will be generated in the voice coil line 322, which is extremely bad for the operation of the speaker 100, which is equivalent to hindering the movement of the diaphragm 31, that is, the electroacoustic conversion efficiency is low. However, in the scheme of the present application, the induced electromotive force generated by the first coil segment 323 and the second coil segment 324 is equal in magnitude and opposite in direction. Since the first coil segment 323 and the second coil segment 324 are connected, the two induced electromotive forces will cancel each other out, which is equivalent to the input current being used to the maximum extent to push the diaphragm 31 to sound outward, that is, the electroacoustic conversion efficiency is high, and the subjective listening loudness is greater. In addition, there is no back-electromotive force, the subjective sound quality is cleaner, and the distortion is greatly reduced. At the same time, since the first coil segment 323 and the second coil segment 324 are driven in the magnetic gap 21, the loudness is further enhanced.

[0123] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An audio device, characterized in that: The audio device comprises: A loudspeaker, the loudspeaker comprising a magnetic circuit system and a vibration system, the magnetic circuit system being provided with a magnetic gap, the vibration system comprising a diaphragm and a voice coil, the diaphragm being connected to one end of the voice coil and being arranged opposite to the magnetic circuit system, the other end of the voice coil being inserted into the magnetic gap, the voice coil comprising a first coil segment and a second coil segment, the first coil segment and the second coil segment being arranged in sequence along the axial direction of the magnetic gap, and a current direction in the first coil segment being opposite to a current direction in the second coil segment; an input module, the input module being electrically connected to the voice coil and configured to input current to the voice coil; and A control module, the control module is electrically connected to the input module, and the control module is used to control the input module to switch the current; Wherein, the loudspeaker also includes a basin frame, which is an integrated structure. The basin frame is provided with an installation cavity, and the magnetic circuit system is arranged in the installation cavity. The diaphragm is connected to the basin frame and arranged opposite to the magnetic circuit system. The basin frame includes a bottom wall and a side wall arranged at the periphery of the bottom wall, and the side wall and the bottom wall enclose the installation cavity. The magnetic circuit system is arranged on the bottom wall, and the periphery of the diaphragm is connected to the side wall and encloses a vibration space. The bottom wall is also provided with a pressure relief hole connected to the vibration space; the magnetic circuit system includes a central magnetic circuit part and a side magnetic circuit part, and the side magnetic circuit part is arranged on the outside of the central magnetic circuit part and is spaced from the central magnetic circuit part to define the magnetic gap, and the central magnetic circuit part includes a first central washer, a central magnet and a second central washer, and the first central washer, the central magnet and the The second center washer is stacked in sequence along the axial direction of the magnetic gap; the side magnetic circuit portion includes a first side washer, a side magnet and a second side washer, and the first side washer, the side magnet and the second side washer are stacked in sequence along the axial direction of the magnetic gap; at least part of the first coil segment corresponds to the first center washer and the first side washer, and at least part of the second coil segment corresponds to the second center washer and the second side washer; the length of the first coil segment along the axial direction of the magnetic gap is greater than or equal to 2 times the thickness of the first center washer or the first side washer, the length of the second coil segment along the axial direction of the magnetic gap is greater than or equal to 2 times the thickness of the second center washer or the second side washer, and the length of the first coil segment along the axial direction of the magnetic gap is the same as the length of the second coil segment along the axial direction of the magnetic gap.

2. The audio device according to claim 1, characterized in that The input module is used to input a first current and a second current into the voice coil, wherein the first current is smaller than the second current; The control module is used to control the input module to switch between at least the first current and the second current, so that the speaker has at least a low power consumption mode or a high-quality sound effect mode.

3. The audio device according to claim 2, characterized in that The control module is provided with an adjustment gear, and the adjustment gear is used to adjust the first current and the second current input by the input module to the voice coil.

4. The audio device according to claim 2, characterized in that The control module is provided with a stepless adjustment structure, and the stepless adjustment structure is used to adjust the first current and the second current input by the input module to the voice coil.

5. The audio device according to claim 1, characterized in that The voice coil comprises a voice coil tube and a voice coil wire wound around the voice coil tube, one end of the voice coil tube is connected to the diaphragm, the other end of the voice coil tube is inserted into the magnetic gap, and the voice coil wire forms the first coil segment and the second coil segment along the axial direction of the voice coil tube; The input module is electrically connected to the voice coil wire.

6. The audio device according to claim 5, characterized in that Adjacent ends of the first coil segment and the second coil segment are connected, and a winding direction of the first coil segment along the circumference of the voice coil tube is opposite to a winding direction of the second coil segment along the circumference of the voice coil tube.

7. The audio device according to claim 1, characterized in that The first center washer and the first side washer have opposite magnetic poles at one end adjacent to the magnetic gap, and the second center washer and the second side washer have opposite magnetic poles at one end adjacent to the magnetic gap; And / or, the first center washer and the second center washer have opposite magnetic poles at one end adjacent to the magnetic gap, and the first side washer and the second side washer have opposite magnetic poles at one end adjacent to the magnetic gap.

8. The audio device according to any one of claims 1 to 7, characterized in that: The loudspeaker further comprises a centering support plate, which is arranged in the installation cavity and connected to the voice coil.

9. The audio device according to claim 8, characterized in that The bottom wall is provided with a groove, the magnetic circuit system is arranged on the bottom wall and covers the notch of the groove, and the magnetic gap is connected with the groove, the centering support piece is arranged in the groove and connected with the voice coil.

10. The audio device according to claim 9, characterized in that A connecting platform is provided on the side wall of the groove, one end of the centering support plate is connected to the connecting platform, and the other end of the centering support plate is connected to the voice coil; And / or, a fixing platform is protruding from the side wall, and the periphery of the diaphragm is connected to the fixing platform.

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