CN114745641A

CN114745641A - Audio equipment

Info

Publication number: CN114745641A
Application number: CN202210190622.XA
Authority: CN
Inventors: 李震
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-07-12

Abstract

The invention discloses audio equipment, which comprises a loudspeaker, an input module and a control module, wherein the loudspeaker comprises a magnetic circuit system and a vibration system, the magnetic circuit system is provided with a magnetic gap, the vibration system comprises a vibration diaphragm and a voice coil, the vibration diaphragm is connected with one end of the voice coil and is arranged opposite to the magnetic circuit system, the other end of the voice coil is inserted into the magnetic gap, the voice coil is provided with a first coil section and a second coil section, the first coil section and the second coil section are sequentially arranged along the axial direction of the magnetic gap, the current direction in the first coil section is opposite to the current direction in the second coil section, the input module is electrically connected with the voice coil, the input module is used for inputting current to the voice coil, the control module is electrically connected with the input module, and the control module is used for controlling the input module to switch the current magnitude. The invention aims to provide audio equipment capable of eliminating the back electromotive force of a voice coil, which can effectively reduce distortion, improve loudness and improve subjective listening quality.

Description

Audio equipment

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to audio equipment.

Background

With the rapid development of science and technology, people have higher and higher requirements on the tone quality of audio equipment, and a sounding device in the audio equipment is influenced by the appearance structure of electronic equipment, so that the volume of the sounding device is smaller and smaller. The sound production device is an important and indispensable functional component of the electronic device, and the sound production device uses a magnetic circuit system to drive the voice coil to vibrate, so that the sound production device radiates more sound outwards. However, in the related art, the current passing through the voice coil of the sound generating device generates a back electromotive force, which causes distortion of the sound generating device, and reduces the loudness and subjective listening quality of the sound generating device.

Disclosure of Invention

The invention mainly aims to provide audio equipment, and aims to provide audio equipment capable of eliminating back electromotive force of a voice coil, which can effectively reduce distortion, improve loudness and improve subjective listening quality.

To achieve the above object, the present invention provides an audio apparatus, including:

the loudspeaker comprises a magnetic circuit system and a vibration system, wherein the magnetic circuit system is provided with a magnetic gap, the vibration system comprises a vibrating diaphragm and a voice coil, the vibrating diaphragm is connected with one end of the voice coil and is arranged opposite to the magnetic circuit system, the other end of the voice coil is inserted into the magnetic gap, the voice coil is provided with a first coil section and a second coil section, the first coil section and the second coil section are sequentially arranged along the axial direction of the magnetic gap, and the current direction in the first coil section is opposite to the current direction in the second coil section;

the input module is electrically connected with the voice coil and is used for inputting current to the voice coil; and

and the control module is electrically connected with the input module and is used for controlling the input module to switch the current.

In one embodiment, the input module is configured to input a first current and a second current to the voice coil, where the first current is smaller than the second current;

the control module is used for controlling the input module to switch between the first current and the second current, so that the loudspeaker has a low power consumption mode or a high-quality sound effect mode.

In an embodiment, the control module is provided with an adjusting gear, and the adjusting gear is used for adjusting the first current and the second current input to the voice coil by the input module.

In an embodiment, the control module is provided with a stepless adjusting structure, and the stepless adjusting structure is used for adjusting the first current and the second current input to the voice coil by the input module.

In an embodiment, the voice coil includes 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 section and the second coil section along an axial direction of the voice coil tube;

the input module is electrically connected with the voice coil wire.

In one embodiment, adjacent ends of the first coil section and the second coil section are connected, and a winding direction of the first coil section along the circumferential direction of the voice coil bobbin is opposite to a winding direction of the second coil section along the circumferential direction of the voice coil bobbin.

In one embodiment, the magnetic circuit system includes a central magnetic circuit portion and a side magnetic circuit portion, the side magnetic circuit portion being disposed outside the central magnetic circuit portion and spaced from the central magnetic circuit portion to define the magnetic gap.

In one embodiment, the central magnetic circuit portion comprises 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;

the side magnetic circuit part comprises 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;

at least part of the first coil section corresponds to the first center washer and the first side washer, and at least part of the second coil section corresponds to the second center washer and the second side washer.

In one embodiment, the magnetic poles of the first center washer and the first edge washer adjacent to one end of the magnetic gap have opposite polarities, and the magnetic poles of the second center washer and the second edge washer adjacent to one end of the magnetic gap have opposite polarities;

and/or the polarities of the magnetic poles of the first central washer and the second central washer adjacent to one end of the magnetic gap are opposite, and the polarities of the magnetic poles of the first edge washer and the second edge washer adjacent to one end of the magnetic gap are opposite.

In one embodiment, the loudspeaker further comprises a basin frame, and the basin frame is provided with a mounting cavity;

the magnetic circuit system is arranged in the installation cavity, and the vibrating diaphragm is connected with the basin frame and arranged opposite to the magnetic circuit system.

In one embodiment, the basin stand comprises a bottom wall and a side wall arranged on the periphery of the bottom wall, the side wall and the bottom wall enclose to form the installation cavity, the magnetic circuit system is arranged on the bottom wall, and the periphery of the diaphragm is connected with the side wall and encloses to form a vibration space;

the bottom wall is also provided with a pressure relief hole communicated with the vibration space.

In an embodiment, the speaker further includes a damper, and the damper is disposed in the mounting cavity and connected to the voice coil.

In an embodiment, the bottom wall is provided with a groove, the magnetic circuit system is arranged on the bottom wall and covers a notch of the groove, the magnetic gap is communicated with the groove, and the centering support piece is arranged in the groove and connected with the voice coil.

In one embodiment, a connecting table is arranged on the side wall of the groove, one end of the centering support sheet is connected with the connecting table, and the other end of the centering support sheet is connected with the voice coil;

and/or, the lateral wall is convexly provided with a fixed platform, and the periphery of the vibrating diaphragm is connected with the fixed platform.

According to the technical scheme, the audio equipment is provided with the loudspeaker, the input module and the control module, so that the input module is electrically connected with the voice coil of the loudspeaker to input current to the voice coil, and the control module controls the input module to switch the current, so that the switching control of different modes is realized; meanwhile, the magnetic gap is arranged in the magnetic circuit system, and the voice coil of the vibration system is inserted into the magnetic gap, so that the magnetic circuit system generates a strong magnetic field in the magnetic gap, the driving force on the voice coil is increased, and the voice coil drives the vibration diaphragm to realize vibration and sound production; further through forming first coil section and second coil section on the voice coil loudspeaker voice coil, make first coil section and second coil section arrange in proper order along the axial direction in magnetic gap, and the current direction in the first coil section is opposite with the current direction in the second coil section, so utilize first coil section and second coil section to produce the size in the magnetic gap and equal, opposite direction's induced electromotive force, make two induced electromotive forces can offset each other, compare with traditional sound generating mechanism, under the condition of input same current, this application can effectively reduce the distortion, it is high to improve electroacoustic conversion efficiency, make subjective listening sense loudness bigger.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of the connection of an audio device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a speaker according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a speaker according to another embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view illustrating the magnetic circuit system and the voice coil of the speaker according to an embodiment of the present invention;

FIG. 5 is a schematic view of a voice coil according to an embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of the voice coil of fig. 5.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Loudspeaker	223	Second central washer
1	Basin rack	224	Mounting hole
				11	Mounting cavity	23	Side magnetic circuit part
12	Bottom wall	231	First side washer
				121	Pressure relief hole	232	Edge magnet
122	Mounting post	233	Second side washer
				123	Mounting table	3	Vibration system
124	Mounting groove	31	Vibrating diaphragm
				125	Dodging groove	32	Voice coil
126	Groove	321	Voice coil tube
				127	Connecting table	322	Voice coil wire
13	Side wall	323	First coil segment
				131	Fixing table	324	Second coil segment
2	Magnetic circuit system	4	Centering support plate
				21	Magnetic gap	500	Input module
22	Central magnetic circuit part	600	Control module
				221	First central washer	700	Audio equipment
222	Central magnet

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Also, the meaning of "and/or" and/or "appearing throughout is meant to encompass three scenarios, exemplified by" A and/or B "including scenario A, or scenario B, or scenarios where both A and B are satisfied.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention proposes an audio device 700.

Referring to fig. 1 to 6, 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 loudspeaker 100 comprises 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 comprises a diaphragm 31 and a voice coil 32, the diaphragm 31 is connected with one end of the voice coil 32, and is disposed 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 section 323 and a second coil section 324, the first coil section 323 and the second coil section 324 are sequentially arranged along the axial direction of the magnetic gap 21, and the current direction in the first coil section 323 is opposite to the current direction in the second coil section 324, the input module 500 is electrically connected to the voice coil 32, the input module 500 is used for inputting 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 for controlling the input module 500 to switch the current magnitude.

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

It can be understood that the signals input in the input module 500 may be obtained by fusing left and right channel signals through an algorithm, or may be input uncoded signals according to left and right paths, which is not limited herein. In this embodiment, the control module 600 controls the input module 500 to switch the current, so that the audio device 700 is in different modes, and the audio device 700 adjusts the different modes as needed, thereby further improving user experience.

In this embodiment, the magnetic circuit system 2 and the vibration system 3 form a main structure of the speaker 100, a magnetic gap 21 is disposed in the magnetic circuit system 2, the voice coil 32 of the vibration system 3 is inserted into the magnetic gap 21, when the voice coil 32 is connected to an external power supply through the input module 500, the voice coil 32 transmits electric energy to the magnetic gap 21 of the magnetic circuit system 2, and under the action of 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 converts the electric energy into mechanical energy, so that the voice coil 32 vibrates.

In this embodiment, after receiving an externally varying alternating current signal through the voice coil 32 disposed in the magnetic gap 21, the voice coil 32 is driven by the magnetic field force of the magnetic circuit system 2 to perform a reciprocating motion of cutting magnetic lines of force, so that the voice coil 32 moves up and down and drives the diaphragm 31 of the vibration system 3 to vibrate and generate sound.

It is understood that the magnetic circuit system 2 is used to form a magnetic field, and the magnetic circuit system 2 forms a stronger magnetic field in the magnetic gap 21 by providing the magnetic gap 21 in the magnetic circuit system 2, so that the voice coil 32 is inserted into the magnetic gap 21, so that the stronger magnetic field in the magnetic gap 21 provides a driving force for the voice coil 32. By connecting and conducting the voice coil 32 in the magnetic gap 21 with an external circuit, the voice coil 32 is driven by the magnetic field force of the magnetic circuit system 2 to perform a reciprocating motion of cutting magnetic lines of force after receiving an externally changing alternating current signal, so that the voice coil 32 performs an up-and-down motion.

Because the interior electric current that lets in of voice coil can produce back electromotive force, back electromotive force can hinder the vibration of voice coil 32, so after voice coil 32 is connected with vibrating diaphragm 31, then can lead to vibrating diaphragm 31's vibration to receive the back electromotive force influence that voice coil 32 formed to make speaker 100 appear the distortion, reduce speaker 100's loudness and subjective listening quality.

In this embodiment, by disposing the first coil section 323 and the second coil section 324 on the voice coil 32, the first coil section 323 and the second coil section 324 are sequentially arranged along the axial direction of the magnetic gap 21, and the current direction in the first coil section 323 is opposite to the current direction in the second coil section 324, so that after an externally-changed alternating current signal is introduced into the voice coil 32, the current direction in the first coil section 323 is opposite to the current direction in the second coil section 324, so that the first coil section 323 and the second coil section 324 generate equal-magnitude induced electromotive forces in the magnetic gap 21 and opposite-direction induced electromotive forces, so that the two induced electromotive forces can cancel each other out, compared with the conventional speaker 100 or audio device 700, under the condition of inputting the same current, the speaker 100 in this application can effectively reduce distortion, thereby improving the electro-acoustic conversion efficiency of the speaker 100, making the subjective listening loudness greater.

In this embodiment, the vibration system 3 includes a diaphragm 31 and a voice coil 32, the diaphragm 31 has a dome, the dome is connected to the diaphragm 31 and located at the center of the diaphragm 31, and the frame 1 is connected to the edge of the diaphragm 31. The strength of the central position of the diaphragm 31 is improved by the dome by attaching the dome to the central position of the diaphragm 31 so that the edge portion of the diaphragm 31 is connected to the magnetic circuit system 2 or the frame 1 of the speaker 100.

It is understood that the diaphragm 31 has an upwardly convex or downwardly concave folded ring portion, the top of the ball is connected to the inside of the folded ring portion of the diaphragm 31, and the outside of the folded ring portion of the diaphragm 31 is connected to the magnetic circuit system 2 or the frame 1 of the speaker 100, which is not limited herein. In this embodiment, the bending ring portion of the vibrating diaphragm 31 can be selected as the bending ring portion of the downward depression or the bending ring portion of the upward protrusion, and the bending ring portion is a U-shaped structure with elastic recovery, so as to be arranged, so that the vibrating diaphragm 31 occupies a small vibration radiation surface on the basis of providing a large compliance, and the vibration sound production area is effectively increased.

In this embodiment, the diaphragm 31 and the dome may be integrally formed by an integral molding technique. It can be understood that the planar portion of the diaphragm 31 is tightly pressed to the dome, and the outer edge of the diaphragm 31 is coupled to the magnetic circuit 2 of the speaker 100 or the frame 1, and the integrally formed diaphragm 31 is connected to the magnetic circuit 2 of the speaker 100 or the frame 1, and the integrally forming technique of the three ensures reliable and durable contact.

The audio device 700 of the present invention is provided with the speaker 100, the input module 500 and the 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, thereby realizing the switching control of different modes; meanwhile, the magnetic gap 21 is arranged in the magnetic circuit system 2, and the voice coil 32 of the vibration system 3 is inserted into the magnetic gap 21, so that the magnetic circuit system 2 generates a strong magnetic field in the magnetic gap 21, the driving force on the voice coil 32 is increased, and the voice coil 32 drives the diaphragm 31 to realize vibration and sound production; further through forming first coil section 323 and second coil section 324 on voice coil 32, make first coil section 323 and second coil section 324 arrange in proper order along the axial direction of magnetic gap 21, and the current direction in first coil section 323 is opposite with the current direction in second coil section 324, it is equal to so utilize first coil section 323 and second coil section 324 to produce the size in magnetic gap 21, the induced electromotive force of opposite direction, make two induced electromotive forces can offset each other, compare with traditional sound generating mechanism, under the condition of the same electric current of input, this application can effectively reduce the distortion, it is high to improve electroacoustic conversion efficiency, make subjective listening sense loudness bigger.

In one embodiment, the input module 500 is configured to input a first current and a second current to the voice coil 32, where the first current is smaller than the second current; the control module 600 is used for controlling 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 good sound effect mode.

In this embodiment, the input module 500 inputs different currents into the voice coil 32, so that the different currents in the voice coil 32 drive the diaphragm 31 to generate different vibrations and generate sound in the magnetic field formed by the magnetic circuit system 2. It is understood that the input module 500 inputs a first current and a second current to the voice coil 32, wherein the first current is smaller than the second current, and when the control module 600 controls the input module 500 to input the smaller first current to 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 to the voice coil 32, the speaker 100 can have a good sound effect mode.

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 good sound effect mode. Of course, the input module 500 may input a plurality of currents to the voice coil 32, each current being between the first current and the second current, such that the control module 600 controls the input module 500 to switch between the plurality of currents, which is not limited herein.

In order to facilitate adjustment or operation by a user, the control module 600 is provided with an adjustment gear, and the adjustment gear is used for adjusting 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 position may be an adjustment button, an adjustment position switch, or an adjustment knob disposed on the audio device 700, and the adjustment position is electrically connected to the control module 600 and the input module 500, so that the user can switch between a plurality of currents through adjusting the adjustment position, and thus the audio device 700 can be switched between different modes. Optionally, the adjustment gear comprises a plurality of gears, each gear corresponding to a current value.

In one embodiment, the control module 600 is provided with a stepless adjusting structure for adjusting 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 adjusting structure may be a stepless adjusting button, a stepless adjusting switch or a stepless adjusting knob, etc. disposed on the audio device 700, the stepless adjusting structure is electrically connected to the control module 600 and the input module 500, and a user can switch the input module 500 among a plurality of currents through the stepless adjusting structure, and switch the audio device 700 among different modes, which is not limited herein.

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 section 323 and a second coil section 324 along an axial direction of the voice coil tube 321; the input module 500 is electrically connected to the voice coil wire 322.

In this embodiment, as shown in fig. 5 and fig. 6, the voice coil 32 is disposed in an annular shape, such 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, so as to improve the vibration effect of the diaphragm 31 and improve the acoustic performance of the speaker.

It will be appreciated that by providing 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 a mounting or support base for the voice coil wire 322. The voice coil tube 321 may be made of a metal or a non-metal material, and in order to reduce the resistance of the voice coil 32, the voice coil tube 321 may be made of a non-metal or non-conductive material, which is not limited herein.

In the present embodiment, the voice coil 322 may be made of a conductive metal wire, such as a copper wire or an aluminum wire or other metal wires capable of conducting electricity, and is not limited herein. As can be understood, the voice coil wire 322 is wound in the circumferential direction of the voice coil bobbin 321 to be fixed to the voice coil bobbin 321, and the voice coil wire 322 forms the first coil section 323 and the second coil section 324 in the axial direction of the voice coil bobbin 321.

Optionally, the voice coil wire 322 may be one or more, and is not limited herein. When the voice coil wire 322 is one, the voice coil wire 322 is wound in the circumferential direction of the voice coil bobbin 321 to form an annular coil, and the annular coil extends in the axial direction of the voice coil bobbin 321 and is arranged at intervals, that is, the voice coil wire 322 is wound on the voice coil bobbin 321 in a spiral manner, at this time, as shown in fig. 5 and 6, the adjacent ends of the first coil section 323 and the second coil section 324 are connected, and the winding direction of the first coil section 323 in the circumferential direction of the voice coil bobbin 321 is opposite to the winding direction of the second coil section 324 in the circumferential direction of the voice coil bobbin 321.

It is understood that when there are a plurality of voice coil wires 322, the plurality of voice coil wires 322 may be wound side by side, and the winding directions of the plurality of voice coil wires 322 are the same, that is, all of the voice coil wires 322 are wound from one end of the voice coil tube 321 at the same time, and the winding manner of the plurality of voice coil wires 322 is the same as that of one voice coil wire 322 in the above-described embodiment. When the plurality of voice coil wires 322 are respectively wound from two ends of the voice coil bobbin 321, the plurality of voice coil wires 322 respectively form a first coil section 323 and a second coil section 324 at two ends of the voice coil bobbin 321, that is, the plurality of voice coil wires 322 may simultaneously form the first coil section 323 and the second coil section 324 on the voice coil bobbin 321 along the axial direction thereof; alternatively, a part of the voice coil wires 322 of the plurality of voice coil wires 322 forms a first coil section 323 on the voice coil bobbin 321, and another part of the voice coil wires 322 of the plurality of voice coil wires 322 forms a second coil section 324 on the voice coil bobbin 321, which is not limited herein.

In an embodiment, the speaker 100 further includes a frame 1, the frame 1 is provided with a mounting cavity 11; the magnetic circuit system 2 is arranged in the installation cavity 11, and the vibrating diaphragm 31 is connected with the basin frame 1 and arranged opposite to the magnetic circuit system 2.

In the present embodiment, as shown in fig. 2 and 3, the frame 1 is used for mounting and protecting the magnetic circuit system 2 and the vibration system 3 of the speaker 100, that is, the frame 1 provides a mounting base for the magnetic circuit system 2 and the vibration system 3. It is understood that the basin stand 1 may be a housing, a box or a box with a mounting cavity 11, and is not limited herein.

It is understood that the frame 1 may be a single structure or a split structure, and is not limited herein. The installation cavity 11 of the basin stand 1 may have a cavity structure with an opening at one end and a closed end, or may have a cavity structure with openings at both ends, which is not limited herein. In this embodiment, the mounting cavity 11 of the frame 1 may have a cavity structure with an open end and a closed end, that is, the frame 1 is a groove structure, the magnetic circuit system 2 and the vibration system 3 are installed in the groove structure, and the diaphragm 31 of the vibration system 3 covers the notch of the groove structure and encloses to form a vibration space.

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

In the present embodiment, as shown in fig. 2 to 4, the central magnetic path portion 22 and the side magnetic path portion 23 of the magnetic path system 2 are both disposed in the mounting cavity 11 of the frame 1, and the central magnetic path portion 22 and the side magnetic path portion 23 of the magnetic path system 2 are spaced and opposite to each other to define the magnetic gap 21. It will be appreciated that the side magnetic circuit portion 23 is disposed outside the central magnetic circuit portion 22, and the side magnetic circuit portion 23 is spaced apart from the central magnetic circuit portion 22 to define the magnetic gap 21, so that a stronger magnetic field is formed in the magnetic gap 21 by the central magnetic circuit portion 22 and the side magnetic circuit portion 23 to improve the driving force of the voice coil 32 inserted in the magnetic gap 21. Alternatively, the side magnetic path portion 23 is disposed around the central magnetic path portion 22 such that the magnetic gap 21 is disposed in an annular shape, and the voice coil 32 is disposed in an annular voice coil, and is inserted into the annular magnetic gap 21, which is not limited herein.

It is understood that the central magnetic path portion 22 of the magnetic circuit system 2 may be a unitary structure, and the central magnetic path portion 22 may be a plate-shaped structure, which is not limited herein. Of course, in other embodiments, the central magnetic path portion 22 may also be a separate structure, for example, the central magnetic path portion 22 is composed of a plurality of portions, and the plurality of portions surround the central magnetic path portion 22 with a hollow structure in the middle. The side magnetic path portion 23 of the magnetic circuit system 2 may be a unitary structure, the side magnetic path portion 23 may be an annular structure, and the central magnetic path portion 22 is located in the annular side magnetic path portion 23 and spaced from the inner ring of the annular side magnetic path portion 23, which is not limited herein. Of course, in other embodiments, the side magnetic path portion 23 may be a separate structure, for example, the side magnetic path portion 23 is composed of a plurality of portions, and the plurality of portions are spaced apart and arranged around the central magnetic path portion 22.

In an embodiment, the magnetic circuit system 2 is disposed in a square shape, the central magnetic circuit portion 22 has a first long side portion and a first short side portion sequentially arranged, the first long side portion and the first short side portion may be an integral long side or short side, or may be disposed separately, for example, the first long side portion and the first short side portion of the central magnetic circuit portion 22 are disposed in a completely broken manner, which is not limited herein. It is understood that the length dimension of the first long side portion may be the same as or different from the length dimension of the first short side portion, and is not limited herein.

The side magnetic circuit portion 23 includes a second long side portion and a second short side portion which are sequentially arranged, and the second long side portion and the second short side portion may be a long side or a short side of an annular whole, or may 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 broken. In this embodiment, the length of the second long side portion may be the same as or different from the length of the second short side portion, and is not limited herein.

Alternatively, the side magnetic path portion 23 and the central magnetic path portion 22 of the magnetic circuit system 2 are both separately disposed, and at this time, the first long side portion of the central magnetic path portion 22 corresponds to and is spaced apart from the second long side portion of the side magnetic path portion 23, and the first short side portion of the central magnetic path portion 22 corresponds to and is spaced apart from the second short side portion of the side magnetic path portion 23, which is not limited herein.

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 sequentially stacked along the axial direction of the magnetic gap 21; the side magnetic circuit part 23 comprises a first side washer 231, a side magnet 232 and a second side washer 233, wherein the first side washer 231, the side magnet 232 and the second side washer 233 are sequentially stacked in the axial direction of the magnetic gap 21; at least part of the first coil section 323 corresponds to the first central washer 221 and the first side washer 231 and at least part of the second coil section 324 corresponds to the second central washer 223 and the second side washer 233.

In the present embodiment, the structures of the central magnetic path portion 22 and the side magnetic path portion 23 may be the same or different, and are not limited herein. As shown in fig. 2 to 4, the central magnetic circuit portion 22 includes a first central washer 221, a central magnet 222 and a second central washer 223 which are sequentially stacked, the side magnetic circuit portion 23 includes a first side washer 231, a side magnet 232 and a second side washer 233 which are sequentially stacked, and the first central washer 221, the central magnet 222 and the second central washer 223 are respectively opposite to and spaced apart from the first side washer 231, the side magnet 232 and the second side washer 233 and are sequentially stacked along the axial direction of the magnetic gap 21.

It will be appreciated that the central magnet 222 of the central magnetic circuit portion 22 and the side magnets 232 of the side magnetic circuit portion 23 form a magnetic field therebetween and form a circular magnetic induction line, such that the first central washer 221 and the second central washer 223 of the central magnetic circuit portion 22 and the first side washer 231 and the second side washer 233 of the side magnetic circuit portion 23 are magnetized to form magnetic poles of different polarities.

In this embodiment, the first central washer 221 and the second central washer 223 may be magnetic conductive plates, and the first side washer 231 and the second side washer 233 may be magnetic conductive plates, which have a magnetic gathering effect and can homogenize the magnetic field generated by the central magnet 222 and the side magnet 232. Alternatively, the center magnet 222 and the edge magnets 232 may be permanent magnets. It is understood that the shape and contour of the center magnet 222 may be the same as or different from the shape and contour of the first center washer 221 and the second center washer 223, and are not limited herein. The shape and contour of the side magnet 232 may be the same as or different from those of the first side washer 231 and the second side washer 233, and are not limited herein.

As shown in fig. 2 and 4, at least a portion of the first coil section 323 of the voice coil 32 corresponds to the first center washer 221 and the first side washer 231, and at least a portion of the second coil section 324 of the voice coil 32 corresponds to the second center washer 223 and the second side washer 233.

By the arrangement, the first coil section 323 can generate induced electromotive force in the first direction under the action of the magnetic field generated by the magnetic circuit system 2 and under the action of the polarized first center washer 221 and the polarized first side washer 231, the second coil section 324 generates induced electromotive force opposite to the first direction under the action of the magnetic field generated by the magnetic circuit system 2 and under the action of the polarized second center washer 223 and the polarized second side washer 233, the induced electromotive force of the first coil section 323 is equal to the induced electromotive force of the second coil section 324 in size and opposite in direction, so that the two induced electromotive forces can be mutually offset, distortion can be effectively reduced under the condition of inputting the same current, the electroacoustic conversion efficiency is improved, and the subjective listening loudness is larger.

In one embodiment, as shown in fig. 2-4, the first center washer 221 and the first side washer 231 have opposite magnetic poles adjacent to one end of the magnetic gap 21, and the second center washer 223 and the second side washer 233 have opposite magnetic poles adjacent to one end of the magnetic gap 21.

It can be understood that if the magnetic pole polarity of the first central washer 221 of the central magnetic path portion 22 is N-pole, the magnetic pole polarity of the first side washer 231 of the side magnetic path portion 23 is S-pole; when the magnetic pole polarity of the first center washer 221 of the center magnetic path portion 22 is S-pole, the magnetic pole polarity of the first side washer 231 of the side magnetic path portion 23 is N-pole.

Of course, if the magnetic pole polarity of the second central washer 223 of the central magnetic path portion 22 is N-pole, the magnetic pole polarity of the second side washer 233 of the side magnetic path portion 23 is S-pole; if the magnetic pole polarity of the second center washer 223 of the center magnetic path portion 22 is S-pole, the magnetic pole polarity of the second side washer 233 of the side magnetic path portion 23 is N-pole.

In one embodiment, as shown in fig. 2-4, the first central washer 221 and the second central washer 223 have opposite magnetic poles adjacent to one end of the magnetic gap 21, and the first side washer 231 and the second side washer 233 have opposite magnetic poles adjacent to one end of the magnetic gap 21.

It can be understood that if the magnetic pole polarity of the first central washer 221 of the central magnetic path portion 22 is N-pole, the magnetic pole polarity of the second central washer 223 of the central magnetic path portion 22 is S-pole; if the magnetic pole polarity of the first central washer 221 of the central magnetic path portion 22 is S-pole, the magnetic pole polarity of the second central washer 223 of the central magnetic path portion 22 is N-pole.

Of course, if the magnetic pole polarity of the first side washer 231 of the side magnetic path portion 23 is N-pole, the magnetic pole polarity of the second side washer 233 of the side magnetic path portion 23 is S-pole; when the magnetic pole polarity of the first side washer 231 of the side magnetic path portion 23 is S-pole, the magnetic pole polarity of the second side washer 233 of the side magnetic path portion 23 is N-pole.

In one embodiment, as shown in fig. 2-4, the width of the magnetic gap 21 is defined as the distance between the central magnetic path portion 22 and the side magnetic path portions 23. Alternatively, the width of the magnetic gap 21 ranges from 0.2mm to 0.5 mm.

It can be understood that the width of the magnetic gap 21 is set in the range of 0.2mm to 0.5mm, 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 is not influenced in the magnetic gap 21. Alternatively, the width of the magnetic gap 21 is 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc., and is not limited thereto.

In one embodiment, as shown in fig. 2-4, the length of the first coil section 323 in the axial direction of the magnetic gap 21 is greater than or equal to 2 times the thickness of the first center washer 221 or the first side washer 231. It is understood that the length of the first coil section 323 in the axial direction of the magnetic gap 21 is the length of the voice coil wire 322 wound around the coil in the axial direction of the voice coil bobbin 321, and the thickness of the first center washer 221 or the first side washer 231 is the thickness of the voice coil bobbin 321 inserted into 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.

In the present embodiment, the length of the first coil segment 323 in the magnetic gap 21 is ensured by setting the length of the first coil segment 323 in the axial direction of the magnetic gap 21 to be greater than or equal to 2 times the thickness of the first center washer 221 or the first side washer 231, so as to ensure that the first coil segment 323 in the voice coil 32 generates a sufficient driving force.

In one embodiment, as shown in fig. 2-4, and/or the length of the second coil section 324 in the axial direction of the magnetic gap 21 is greater than or equal to 2 times the thickness of the second center washer 223 or the second side washer 233. It is understood that the length of the second coil section 324 in the axial direction of the magnetic gap 21 is the length of the voice coil wire 322 wound around the coil in the axial direction of the voice coil bobbin 321, and the thickness of the second center washer 223 or the second side washer 233 is the thickness of the voice coil bobbin 321 in the direction of inserting the magnetic gap 21. Optionally, the thickness of the second central washer 223 is the same as the thickness of the second side washer 233.

In the present embodiment, the length of the second coil section 324 in the magnetic gap 21 is ensured by setting the length of the second coil section 324 in the axial direction of the magnetic gap 21 to be greater than or equal to 2 times the thickness of the second center washer 223 or the second side washer 233, so as to ensure that the second coil section 324 generates a sufficient driving force in the voice coil 32.

Optionally, the thickness of the first central washer 221 is the same as the thickness of the second central washer 223, and the thickness of the first lateral washer 231 is the same as the thickness of the second lateral washer 233. The length of the first coil section 323 in the axial direction of the magnetic gap 21 is the same as the length of the second coil section 324 in the axial direction of the magnetic gap 21, so that the induced electromotive forces generated by the first coil section 323 and the second coil section 324 are ensured to be equal in magnitude and opposite in direction.

In one embodiment, as shown in fig. 2 to 4, the thickness of the center magnet 222 is greater than or equal to 4 times the thickness of the first center washer 221 or the second center 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 will be appreciated that this arrangement ensures that the central magnet 222 and the side magnets 232 of the magnetic circuit system 2 are capable of generating sufficient magnetic field strength to enable the first central washer 221, the second central washer 223, the first side washer 231 and the second side washer 233 to be polarised.

In one embodiment, the frame 1 includes a bottom wall 12 and a side wall 13 disposed at a periphery of the bottom wall 12, the side wall 13 and the bottom wall 12 enclose to form a mounting cavity 11, the magnetic circuit system 2 is disposed at the bottom wall 12, and a periphery of the diaphragm 31 is connected to the side wall 13 and encloses to form a vibration space; the bottom wall 12 is further provided with a pressure relief hole 121 communicated with the vibration space.

In the present embodiment, as shown in fig. 2 and 3, the bottom wall 12 and the side wall 13 of the frame 1 enclose the mounting cavity 11 forming a groove structure, and the central magnetic path portion 22 and the side magnetic path portion 23 of the magnetic path system 2 are both disposed on the bottom wall 12, and the side magnetic path portion 23 is located between the central magnetic path portion 22 and the side wall 13.

It will be understood that the periphery of the diaphragm 31 is connected to the sidewall 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 communicated with the vibration space.

In an embodiment, the bottom wall 12 is protruded with a mounting post 122, the magnetic circuit system 2 is further provided with a mounting hole 224 disposed at an interval with the magnetic gap 21, the mounting post 122 is disposed through the mounting hole 224, and the pressure relief hole 121 is disposed through the bottom wall 12 and the mounting post 122.

As shown in fig. 2 and 3, the mounting post 122 is protruded on the bottom wall 12, and the mounting hole 224 is opened in the central magnetic path portion 22 of the magnetic path system 2, so that the magnetic path system 2 can be conveniently positioned and mounted by using the mounting post 122, that is, the mounting post 122 is inserted into the mounting hole 224. It will be appreciated that mounting hole 224 is spaced from magnetic gap 21 and that pressure relief hole 121 is disposed through bottom wall 12 and mounting post 122.

In an embodiment, the bottom wall 12 is convexly provided with a mounting post 122 and a mounting platform 123 disposed around the mounting post 122, the mounting platform 123 is provided with a mounting groove 124, the magnetic circuit system 2 is further provided with a mounting hole 224 disposed at an interval with the magnetic gap 21, the mounting post 122 is disposed in the mounting hole 224 in a penetrating manner, a 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 avoiding groove 125 corresponding to the magnetic gap 21.

In the present embodiment, as shown in fig. 2 and 3, the mounting post 122 and the mounting table 123 are disposed on the bottom wall 12, so that the mounting table 123 is disposed around the mounting post 122, and the mounting groove 124 is disposed on the mounting table 123, so that the central magnetic circuit portion 22 and the side magnetic circuit portion 23 of the magnetic limit circuit system 2 are cooperatively mounted by the mounting groove 124 and the mounting post 122.

It can be understood that, the central magnetic circuit portion 22 of the magnetic circuit system 2 is provided with the mounting hole 224, so that the magnetic circuit system 2 can be conveniently positioned and mounted by using the mounting post 122, that is, the mounting post 122 is inserted into the mounting hole 224. It will be appreciated that mounting hole 224 is spaced from magnetic gap 21 and that pressure relief hole 121 is disposed through bottom wall 12 and mounting post 122.

In the present embodiment, the bottom wall 12 of the mounting groove 124 is provided with an avoiding groove 125 corresponding to the magnetic gap 21, so that the avoiding groove 125 provides an avoiding space for the voice coil 32 to vibrate in the magnetic gap 21.

In one embodiment, the speaker 100 further includes a damper 4, and the damper 4 is disposed in the mounting cavity 11 and connected to the voice coil 32.

In the present embodiment, as shown in fig. 3, one end of the damper 4 is connected to the frame 1, and the other end of the damper 4 is connected to the voice coil 32. It will be appreciated that the spider 4 is provided with an inner pad to which the lead portion of the voice coil 32 is welded. It can be understood that, by arranging the damper 4, the damper 4 is utilized to effectively avoid the swing phenomenon of the voice coil 32 in the vibration process, and meanwhile, the damper 4 is utilized to realize the connection and conduction of the voice coil 32 and the external circuit. Alternatively, the centering chip 4 may be a single structure or may include a plurality of structures.

In this embodiment, set up inner bonding pad and outer bonding pad on centering branch piece 4 for the lead wire portion and the inner bonding pad welding of voice coil 32, outer bonding pad is connected with input module 500 electricity, so usable centering branch piece 4 realizes the electricity between voice coil 32 and the external circuit and is connected, effectively avoids voice coil 32 to take place the lead wire fracture at the vibration in-process, leads to the not smooth problem of circuit conduction, avoids voice coil 32 vibration in-process to take place the swing, thereby further improves speaker 100's acoustic performance.

It can be understood that the damper 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, the inner fixing portion is provided with an inner pad, so that the damper 4 may be fixed to the magnetic circuit system 2 or the frame 1 through the outer fixing portion, thereby improving the mounting stability of the damper 4. Meanwhile, the elastic part can generate sound and elastically deform when the voice coil 32 vibrates, so that the conduction between the voice coil 32 and an external circuit can be realized through the centering support piece 4, and the problems of unsmooth conduction and the like caused by the breakage of a lead wire of the voice coil in the vibration process of the voice coil 32 can be avoided.

Certainly, centering support 4 also can be replaced by the auxiliary diaphragm, and the auxiliary diaphragm has a folding ring structure, so usable auxiliary diaphragm and the cooperation of vibrating diaphragm 31 effectively avoid voice coil 32 vibration in-process to take place the swing, cause phenomena such as polarization or resonance to appear in vibrating diaphragm 31.

According to the invention, the mounting cavity 11 is arranged in the basin frame 1, and the magnetic circuit system 2, the vibration system 3 and the centering support piece 4 are arranged in the mounting cavity 11 of the basin frame 1, so that the magnetic circuit system 2, the vibration system 3 and the centering support piece 4 are mounted and fixed; the magnetic gap 21 is arranged in the magnetic circuit system 2, and the voice coil 32 is inserted into the magnetic gap 21, so that the magnetic circuit system 2 generates a strong magnetic field in the magnetic gap 21, the driving force on the voice coil 32 is increased, the voice coil 32 drives the vibrating diaphragm 31 to vibrate and sound, and the centering disk 4 is connected with the voice coil 32 by arranging the centering disk 4, so that the voice coil 32 is effectively prevented from swinging in the vibration process by the centering disk 4, and the acoustic performance of the loudspeaker 100 is improved; meanwhile, a first coil section 323 and a second coil section 324 are formed on the voice coil 32, so that the first coil section 323 and the second coil section 324 are sequentially arranged along the axial direction of the magnetic gap 21, and the current direction in the first coil section 323 is opposite to the current direction in the second coil section 324, so that the first coil section 323 and the second coil section 324 are utilized to generate equal magnitude in the magnetic gap 21, induced electromotive forces with opposite directions are generated, so that the two induced electromotive forces can be mutually offset.

In one embodiment, loudspeaker 100 may also eliminate spider 4, thereby greatly reducing the thickness from the axial direction by adding a magnetic fluid in magnetic gap 21 instead of the centering effect of spider 4. Meanwhile, the width of the corrugated rim of the diaphragm 31 is increased, so that more smoothness is guaranteed for the loudspeaker 100, and the problem caused by removal of the centering disk is solved.

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

In this embodiment, as shown in fig. 3, the side wall 13 of the frame 1 is disposed at the periphery of the bottom wall 12, the side wall 13 and the bottom wall 12 enclose to form an installation cavity 11, and the periphery of the diaphragm 31 is connected to the side wall 13 and encloses to form a vibration space; the bottom wall 12 is further provided with a pressure relief hole 121 communicated with the vibration space.

It can be understood that the bottom wall 12 and the side wall 13 of the frame 1 enclose a mounting cavity 11 with a groove structure, and the magnetic circuit system 2 is arranged on the bottom wall 12. It is understood that, for the convenience of mounting and fixing the damper 4, the bottom wall 12 is provided with a groove 126, so that the magnetic circuit system 2 is disposed on the bottom wall 12 and covers the notch of the groove 126, that is, the magnetic circuit system 2 and the groove 126 cooperate to form a mounting space, in which case the magnetic gap 21 communicates with the groove 126, and the damper 4 is disposed in the groove 126 and connected to the voice coil 32.

It will be appreciated 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 communicated with the vibration space.

In one embodiment, as shown in fig. 3, the side wall of the groove 126 is provided with a connection stage 127, one end of the damper 4 is connected to the connection stage 127, and the other end of the damper 4 is connected to the voice coil 32. It can be understood that the connection table 127 having a step structure is disposed on the side wall of the groove 126, so that the clip 4 is easily mounted and fixed, one end of the clip 4 is connected to the connection table 127, and the other end of the clip 4 is connected to one end of the voice coil 32 penetrating through the magnetic gap 21.

In one embodiment, as shown in fig. 2 and 3, the sidewall 13 is convexly provided with a fixed platform 131, and the periphery of the diaphragm 31 is connected with the fixed platform 131. As can be appreciated, such an arrangement can effectively improve the mounting stability of the diaphragm 31. Alternatively, the diaphragm 31 may be fixed to the fixing base 131 by adhesive.

In this embodiment, the fixing platform 131 may be a step structure formed at an end portion of the side wall 13, or may be a boss structure formed by protruding a side of the side wall 13 facing the inside of the mounting cavity 11, which is not limited herein.

The first coil section 323 and the second coil section 324 of the voice coil 32 of the speaker 100 of the audio device 700 of the present invention may be formed by winding the same voice coil wire 322, wherein the voice coil wire 322 is reversely wound at the middle portion of the voice coil tube 321, i.e., the middle portions of the center magnet 222 and the edge magnet 232, i.e., when the current in the first coil section 323 of the upper voice coil wire 322 is out of the vertical plane of the paper, the current in the second coil section 324 is in the vertical plane of the paper, as shown in fig. 5 and 6.

It can be understood that the polarities of the first center washer 221 and the first side washer 231 and the polarities of the second center washer 223 and the second side washer 233 at the left and right ends of the magnetic gap 21 are opposite, that is, as shown in fig. 2 to 4, when the first side washer 231 at the left end of the magnetic gap 21 is an S pole, the first center washer 221 at the right end of the magnetic gap 21 is an N pole, the magnetic induction line at the upper end of the magnetic gap 21 is from right to left, and according to left-hand rule, the driving force generated by the first coil section 323 is directed upward; the second side washer 233 at the left end of the magnetic gap 21 is an N pole, the second center washer 223 at the right end of the magnetic gap 21 is an S pole, the magnetic induction lines at the lower end of the magnetic gap 21 are from left to right, and the direction of the driving force generated by the second coil section 324 is upward according to the left-hand rule. The first coil section 323 and the second coil section 324 are stressed in the same direction, and simultaneously drive the voice coil tube 321 to move up and down, so as to push the diaphragm to radiate sound outwards. Compared with a conventional loudspeaker magnetic circuit system, the design has the advantages that the electro-acoustic conversion efficiency is higher and the loudness is higher under the same power.

When the first coil section 323 and the second coil section 324 move upward to the highest point of the stroke, in the conventional speaker design, the voice coil tube 321 is driven by the downward driving force provided by the corrugated rim and the centering chip of the diaphragm 31 to drive the voice coil tube 321 to move downward, but according to the left-hand rule, the voice coil 32 is actually driven by the upward driving force, but the magnetic induction line is cut during the downward movement, and an induced electromotive force opposite to the current is generated in the voice coil line 322, which is very bad for the operation of the speaker 100, and is equivalent to blocking the movement of the diaphragm 31, i.e. the electro-acoustic conversion efficiency is low. However, in the scheme of the present application, the induced electromotive forces generated by the first coil section 323 and the second coil section 324 are equal in magnitude and opposite in direction, and since the first coil section 323 and the second coil section 324 are communicated, the two induced electromotive forces can be mutually offset, which is equivalent to that the input current can be used to push the diaphragm 31 to sound outwards to the maximum extent, that is, the electroacoustic conversion efficiency is high, and the subjective listening loudness is larger. In addition, the subjective tone quality is cleaner without the obstruction of an inverse electrodynamic type, and the distortion is greatly reduced. At the same time, the loudness enhancement is further increased by the fact that the first coil section 323 and the second coil section 324 are driven in the magnetic gap 21.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An audio device, characterized in that the audio device comprises:

2. The audio device of claim 1, wherein the input module is configured to input a first current and a second current to the voice coil, the first current being less than the second current;

the control module is used for controlling the input module to switch at least between the first current and the second current, so that the loudspeaker at least has a low power consumption mode or a high-quality sound effect mode.

3. The audio device as claimed in claim 2, wherein the control module is provided with an adjustment gear for adjusting the first current and the second current input by the input module to the voice coil.

4. The audio device according to claim 2, wherein the control module is provided with a stepless adjustment structure for adjusting the first current and the second current input by the input module to the voice coil.

5. The audio device according to claim 1, wherein the voice coil includes 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 section and the second coil section in an axial direction of the voice coil tube;

the input module is electrically connected with the voice coil wire.

6. The audio device as claimed in claim 5, wherein adjacent ends of the first coil section and the second coil section are connected, and a winding direction of the first coil section in a circumferential direction of the voice coil bobbin is opposite to a winding direction of the second coil section in the circumferential direction of the voice coil bobbin.

7. The audio device as claimed in claim 1, wherein the magnetic circuit system includes a central magnetic circuit portion and a side magnetic circuit portion, the side magnetic circuit portion being provided outside the central magnetic circuit portion and spaced from the central magnetic circuit portion to define the magnetic gap.

8. The audio device as claimed in claim 7, wherein the central magnetic circuit portion comprises a first central washer, a central magnet and a second central washer, the first central washer, the central magnet and the second central washer being sequentially stacked in an axial direction of the magnetic gap;

9. The audio device as claimed in claim 8, wherein the first center washer and the first side washer have opposite poles adjacent one end of the magnetic gap, and the second center washer and the second side washer have opposite poles adjacent one end of the magnetic gap;

10. The audio device of any of claims 1 to 9, wherein the speaker further comprises a frame, the frame being provided with a mounting cavity;

11. The audio device as claimed in claim 10, wherein the frame comprises a bottom wall and a side wall disposed at a periphery of the bottom wall, the side wall and the bottom wall enclose the mounting cavity, the magnetic circuit system is disposed at the bottom wall, and a periphery of the diaphragm is connected to the side wall and encloses a vibration space;

12. The audio device of claim 11, wherein the speaker further comprises a spider disposed within the mounting cavity and coupled to the voice coil.

13. The audio device as claimed in claim 12, wherein the bottom wall has a recess, the magnetic circuit is disposed on the bottom wall and covers a notch of the recess, the magnetic gap communicates with the recess, and the centering pad is disposed in the recess and connected to the voice coil.

14. The audio device as claimed in claim 13, wherein the side wall of the recess is provided with a connection pad, one end of the damper is connected to the connection pad, and the other end of the damper is connected to the voice coil;