CN114466289B - Speaker and electronic device - Google Patents
Speaker and electronic device Download PDFInfo
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- CN114466289B CN114466289B CN202210150942.2A CN202210150942A CN114466289B CN 114466289 B CN114466289 B CN 114466289B CN 202210150942 A CN202210150942 A CN 202210150942A CN 114466289 B CN114466289 B CN 114466289B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
Abstract
The invention discloses a loudspeaker and electronic equipment, wherein the loudspeaker comprises a basin frame, a magnetic circuit system and a vibration system, the basin frame is provided with an installation cavity, the magnetic circuit system is arranged in the installation cavity, 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 the basin frame and is arranged opposite to the magnetic circuit system, one end of the voice coil is connected with the vibrating diaphragm, 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 invention aims to provide a loudspeaker capable of eliminating the reverse electromotive force of a voice coil, which can effectively reduce distortion, improve loudness and improve subjective listening quality.
Description
Technical Field
The invention relates to the technical field of electroacoustic conversion, in particular to a loudspeaker and electronic equipment using the loudspeaker.
Background
Along with the rapid development of technology, people have higher and higher requirements on sound quality of electronic equipment, and sound emitting devices in the electronic equipment are affected by the appearance structure of the electronic equipment, so that the volume of the sound emitting devices is smaller and smaller. The sound generating device is used as an important and indispensable functional component of the electronic equipment, and the magnetic circuit system is used for driving the voice coil to vibrate, so that the sound generating device radiates more sound outwards. However, in the related art, when current is supplied to the voice coil, a reverse electromotive force is generated, which causes distortion of the sound emitting device, and reduces the loudness and subjective listening quality of the sound emitting device.
Disclosure of Invention
The invention mainly aims to provide a loudspeaker and electronic equipment, and aims to provide a loudspeaker capable of eliminating the reverse 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 proposes a speaker including:
the basin stand is provided with a mounting cavity;
the magnetic circuit system is arranged in the mounting cavity and is provided with a magnetic gap; and
The vibration system comprises a vibrating diaphragm and a voice coil, wherein the vibrating diaphragm is connected with the basin frame and is opposite to the magnetic circuit, one end of the voice coil is connected with the vibrating diaphragm, 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.
In one embodiment, the magnetic circuit 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 apart from the central magnetic circuit portion to define the magnetic gap.
In an embodiment, the central magnetic circuit portion includes 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 along an axial direction of the magnetic gap;
the side magnetic circuit part comprises a first side washer, a side magnet and a second side Bian Huasi, wherein the first side washer, the side magnet and the second side Bian Huasi are sequentially stacked along the axial direction of the magnetic gap;
at least a portion of the first coil segment corresponds to the first central washer and the first side washer, and at least a portion of the second coil segment corresponds to the second central washer and the second Bian Huasi.
In one embodiment, the first central washer and the first side washer have opposite polarities of magnetic poles adjacent to one end of the magnetic gap, and the second central washer and the second side washer have opposite polarities of magnetic poles adjacent to one end of the magnetic gap;
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 side washer and the second side washer Bian Huasi adjacent to one end of the magnetic gap are opposite.
In one embodiment, the width of the magnetic gap ranges from 0.2mm to 0.5mm;
and/or the length of the first coil section along the axial direction of the magnetic gap is greater than or equal to 2 times the thickness of the first central washer or the first side washer;
and/or the second coil section has a length along the axial direction of the magnetic gap that is greater than or equal to 2 times the thickness of the second central washer or the second Bian Huasi;
and/or the thickness of the central magnet is greater than or equal to 4 times the thickness of the first central washer or the second central washer;
and/or the thickness of the side magnet is greater than or equal to 4 times the thickness of the first side washer or the second side washer Bian Huasi.
In an embodiment, the voice coil includes a voice coil pipe and a voice coil wire wound around the voice coil pipe, one end of the voice coil pipe is connected to the diaphragm, the other end of the voice coil pipe 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 pipe.
In an embodiment, the first coil segment and the second coil segment are connected at adjacent ends, and a winding direction of the first coil segment along a circumferential direction of the voice coil tube is opposite to a winding direction of the second coil segment along the circumferential direction of the voice coil tube.
In an 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 are enclosed to form the mounting cavity, the magnetic circuit system is arranged on the bottom wall, and the periphery of the vibrating diaphragm is connected with the side wall and enclosed to form a vibrating space;
the bottom wall is also provided with a pressure relief hole communicated with the vibration space.
In an embodiment, the bottom wall is convexly provided with a mounting column, the magnetic circuit system is further provided with mounting holes which are arranged at intervals with the magnetic gaps, the mounting column penetrates through the mounting holes, and the pressure relief holes penetrate through the bottom wall and the mounting column;
and/or, the diapire is protruding to be equipped with the erection column and encircle the erection table that the erection column set up, the erection table is equipped with the mounting groove, magnetic circuit still be equipped with the mounting hole that the magnetic gap interval set up, the erection column wears to locate in the mounting hole, part magnetic circuit holds and is located in the mounting groove, the diapire of mounting groove corresponds the magnetic gap is equipped with dodges the groove.
The invention also provides electronic equipment, which comprises an equipment shell and the loudspeaker, wherein the loudspeaker is arranged on the equipment shell.
According to the loudspeaker of the technical scheme, the mounting cavity is formed in the basin frame, and the magnetic circuit system and the vibration system are arranged in the mounting cavity of the basin frame, so that the magnetic circuit system and the vibration system are mounted and fixed; the magnetic gap is arranged in the magnetic circuit system, and the voice coil is inserted into the magnetic gap, so that the magnetic circuit system generates a stronger magnetic field in the magnetic gap, the driving force to the voice coil is increased, and the voice coil drives the vibrating diaphragm to realize vibration sounding; simultaneously, form first coil section and second coil section on the voice coil for first coil section and second coil section arrange in proper order along the axial direction of magnetic gap, and the current direction in the first coil section is opposite with the current direction in the second coil section, so utilizes first coil section and second coil section to produce the equal size in magnetic gap, the opposite direction induced electromotive force, make two induced electromotive forces can offset each other, compare with traditional sound production device, under the condition of the same electric current of input, this application can effectively reduce distortion, it is high to improve electroacoustic conversion efficiency, make the subjective hearing 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 that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a speaker according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view illustrating a magnetic circuit system and a voice coil of a speaker according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an audio coil according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of the voice coil of fig. 3.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Loudspeaker | 222 | Center magnet |
| 1 | Basin stand | 223 | Second center washer |
| 11 | Mounting cavity | 224 | Mounting hole |
| 12 | Bottom wall | 23 | Side magnetic circuit part |
| 13 | Side wall | 231 | First side washer |
| 14 | Pressure relief hole | 232 | Side magnet |
| 15 | Avoidance groove | 233 | Second Bian Huasi |
| 16 | Mounting column | 3 | Vibration system |
| 17 | Mounting table | 31 | Vibrating diaphragm |
| 18 | Mounting groove | 32 | Voice coil |
| 2 | Magnetic circuit system | 321 | Voice coil pipe |
| 21 | Magnetic gap | 322 | Voice coil wire |
| 22 | Central magnetic circuit part | 323 | First coil section |
| 221 | First center washer | 324 | Second coil section |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Along with the rapid development of technology, people have higher and higher requirements on sound quality of electronic equipment, and sound emitting devices in the electronic equipment are affected by the appearance structure of the electronic equipment, so that the volume of the sound emitting devices is smaller and smaller. The sound generating device is used as an important and indispensable functional component of the electronic equipment, and the magnetic circuit system is used for driving the voice coil to vibrate, so that the sound generating device radiates more sound outwards. However, in the related art, when current is supplied to the voice coil, a reverse electromotive force is generated, which causes distortion of the sound emitting device, and reduces the loudness and subjective listening quality of the sound emitting device.
Based on the above concepts and problems, the present invention proposes a speaker 100. It will be appreciated that the speaker 100 may be used in electronic devices such as, for example, speakers, cell phones, headphones, computers, etc., and is not limited thereto.
Referring to fig. 1 to 4, in an embodiment of the invention, the speaker 100 includes a frame 1, a magnetic circuit 2 and a vibration system 3, wherein the frame 1 is provided with a mounting cavity 11, the magnetic circuit 2 is disposed in the mounting cavity 11, the magnetic circuit 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 with the frame 1 and is disposed opposite to the magnetic circuit 2, one end of the voice coil 32 is connected with the diaphragm 31, 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 an axial direction of the magnetic gap 21, and a current direction in the first coil section 323 is opposite to a current direction in the second coil section 324.
In this embodiment, as shown in fig. 1, the basin stand 1 is used for installing, fixing and protecting the components of the magnetic circuit system 2, the vibration system 3 and the like, that is, the basin stand 1 provides an installation basis for the components of the magnetic circuit system 2, the vibration system 3 and the like. It will be appreciated that the basin stand 1 may be a casing, a box or a case having the installation cavity 11, and is not limited herein.
It will be appreciated that the basin stand 1 may be of a single structure or a split structure, and is not limited thereto. The mounting cavity 11 of the basin stand 1 may be a cavity structure with one end open and one end closed, or may be a cavity structure with two ends open, which is not limited herein. In this embodiment, the mounting cavity 11 of the basin stand 1 may have a cavity structure with one open end and one closed end, that is, the basin stand 1 is disposed in a groove structure, the components such as the magnetic circuit system 2 and the vibration system 3 are installed in the groove structure, and the vibrating diaphragm 31 of the vibration system 3 covers the notch of the groove structure and encloses to form a vibration space.
In this embodiment, the magnetic circuit 2 and the vibration system 3 form a main structure of the speaker 100, a magnetic gap 21 is disposed in the magnetic circuit 2, a voice coil 32 of the vibration system 3 is inserted into the magnetic gap 21, when the voice coil 32 is connected with an external power source, electric energy is transmitted into the magnetic gap 21 of the magnetic circuit 2 by using the voice coil 32, and under the action of magnetic force lines generated by the magnetic gap 21, the voice coil 32 moves up and down, that is, the electric energy is converted into mechanical energy by using a magnetic field generated by the magnetic circuit 2, so that the voice coil 32 vibrates.
In this embodiment, after receiving an externally-changed ac signal through the voice coil 32 disposed in the magnetic gap 21, the voice coil 32 is driven by the magnetic force of the magnetic circuit system 2 to reciprocate to cut 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 sound.
It will be appreciated that the magnetic circuit 2 is configured to form a magnetic field, and the magnetic gap 21 is provided in the magnetic circuit 2, so that the magnetic circuit 2 forms a strong magnetic field in the magnetic gap 21, and the voice coil 32 is inserted into the magnetic gap 21, so that the strong magnetic field in the magnetic gap 21 provides 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 receives an externally-changed alternating current signal and then moves to cut magnetic force lines in a reciprocating manner under the driving of the magnetic field force of the magnetic circuit system 2, so that the voice coil 32 moves up and down.
Because the current can produce reverse electromotive force in the voice coil, the reverse electromotive force can hinder the vibration of the voice coil 32, so after the driving assembly is applied to the loudspeaker, the voice coil 32 is connected with the vibrating diaphragm 31, and then the vibration of the vibrating diaphragm 31 can be influenced by the reverse electromotive force formed by the voice coil 32, so that the loudspeaker is distorted, and the loudness and subjective listening quality of the loudspeaker are reduced.
In this embodiment, by arranging 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, and thus the first coil section 323 and the second coil section 324 generate induced electromotive forces with equal magnitudes and opposite directions in the magnetic gap 21, so that the two induced electromotive forces can cancel each other, and under the condition of inputting the same current, the driving assembly can effectively reduce distortion, improve the electroacoustic conversion efficiency of the speaker, and make the loudness of the primary hearing sense larger.
In this embodiment, the vibration system 3 includes a diaphragm 31 and a voice coil 32, the diaphragm 31 has a dome, and the dome is connected to the diaphragm 31 and located at a center position of the diaphragm 31, and a rim portion frame 1 of the diaphragm 31 is connected. By connecting the dome to the center of the diaphragm 31, the edge of the diaphragm 31 is connected to the frame 1, and the strength of the center of the diaphragm 31 is improved by the dome.
It can be understood that the diaphragm 31 has an upwardly convex or downwardly concave ring portion, the dome is connected to the inner side of the ring portion of the diaphragm 31, and the outer side of the ring portion of the diaphragm 31 is connected to the frame 1, which is not limited herein. In this embodiment, the ring-folding portion of the diaphragm 31 may be a ring-folding portion that is concave downward or a ring-folding portion that is convex upward, that is, the ring-folding portion has a U-shaped structure with elastic recovery, so that the diaphragm 31 occupies a small vibration radiation surface on the basis of providing greater compliance, and effectively increases the vibration sound-producing area.
In this embodiment, the diaphragm 31 and the dome may be manufactured as a single structure by an integral molding technique. It can be understood that the planar portion of the diaphragm 31 is tightly pressed against the dome, and the outer edge of the diaphragm 31 is coupled to the frame 1, and the diaphragm 31 is integrally formed and connected to the frame 1, so that the contact is reliable and durable.
According to the loudspeaker 100, the installation cavity 11 is arranged in the basin frame 1, and the magnetic circuit system 2 and the vibration system 3 are arranged in the installation cavity 11 of the basin frame 1, so that the installation and the fixation of the magnetic circuit system 2 and the vibration system 3 are realized; by arranging the magnetic gap 21 in the magnetic circuit system 2 and inserting the voice coil 32 in the magnetic gap 21, the magnetic circuit system 2 generates a stronger magnetic field in the magnetic gap 21, so that the driving force to the voice coil 32 is increased, and the voice coil 32 drives the diaphragm 31 to realize vibration sounding; meanwhile, the first coil section 323 and the second coil section 324 are formed 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 the first coil section 323 and the second coil section 324 are utilized to generate induced electromotive forces with equal size and opposite direction in the magnetic gap 21, the two induced electromotive forces can offset each other, and compared with a traditional sounding device, distortion can be effectively reduced under the condition of inputting the same current, electroacoustic conversion efficiency is improved, and the main hearing feeling loudness is larger. Meanwhile, the voice coil 32 structure in the present application does not increase or change the size of the speaker 100.
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 being disposed outside the central magnetic circuit portion 22 and spaced from the central magnetic circuit portion 22 to define the magnetic gap 21.
In this embodiment, as shown in fig. 1, the central magnetic circuit portion 22 and the side magnetic circuit portion 23 of the magnetic circuit 2 are disposed in the mounting cavity 11 of the basin stand 1, and the central magnetic circuit portion 22 and the side magnetic circuit portion 23 of the magnetic circuit 2 are disposed at intervals and opposite to define the magnetic gap 21. It will be appreciated that the side magnetic path portion 23 is provided outside the center magnetic path portion 22, and the side magnetic path portion 23 is provided at a distance from the center magnetic path portion 22 to define the magnetic gap 21, so that a strong magnetic field is formed in the magnetic gap 21 by the center magnetic path portion 22 and the side magnetic path portion 23 to enhance the driving force of the voice coil 32 inserted in the magnetic gap 21. Alternatively, the side magnetic circuit portion 23 is disposed around the center magnetic circuit portion 22 such that the magnetic gap 21 is disposed in a ring shape, and the voice coil 32 is disposed in a ring shape voice coil and inserted into the ring-shaped magnetic gap 21, without limitation.
It will be appreciated that the central magnetic circuit portion 22 of the magnetic circuit system 2 may be a unitary structure, and the central magnetic circuit portion 22 may alternatively be a plate-like structure, without limitation. Of course, in other embodiments, the central magnetic circuit portion 22 may be a split structure, for example, the central magnetic circuit portion 22 is formed of multiple portions, and the multiple portions enclose the central magnetic circuit portion 22 with a hollow structure therebetween. The side magnetic circuit portion 23 of the magnetic circuit system 2 may be a unitary structure, the side magnetic circuit portion 23 may alternatively be a ring-shaped structure, and the central magnetic circuit portion 22 is located in the ring-shaped side magnetic circuit portion 23 and spaced from the inner ring of the ring-shaped side magnetic circuit portion 23, which is not limited herein. Of course, in other embodiments, the side magnetic circuit portion 23 may be a split structure, for example, the side magnetic circuit portion 23 is made up of a plurality of portions that are spaced apart and disposed around the center magnetic circuit portion 22.
In an embodiment, the magnetic circuit 2 is square, the central magnetic circuit portion 22 has a first long side portion and a first short side portion that are sequentially arranged, and the first long side portion and the first short side portion may be an integral long side or short side, or may be separate, for example, the first long side portion and the first short side portion of the central magnetic circuit portion 22 are completely broken, which is not limited herein. It is understood that the length of the first long side portion may be the same as or different from the length of the first short side portion, which 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 ring-shaped integral long side or short side, or may be separate, for example, the second long side portion and the second short side portion of the side magnetic circuit portion 23 are provided in a complete interruption. In the present 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 the present invention is not limited thereto.
Alternatively, the side magnetic circuit portion 23 and the central magnetic circuit portion 22 of the magnetic circuit system 2 are all separately disposed, where the first long side portion of the central magnetic circuit portion 22 corresponds to and is spaced from the second long side portion of the side magnetic circuit portion 23, and the first short side portion of the central magnetic circuit portion 22 corresponds to and is spaced from the second short side portion of the side magnetic circuit 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, the first central washer 221, the central magnet 222, and the second central washer 223 being sequentially stacked along the axial direction of the magnetic gap 21; the side magnetic path portion 23 includes a first side washer 231, a side magnet 232, and a second Bian Huasi 233, and the first side washer 231, the side magnet 232, and the second Bian Huasi 233 are stacked in this order along the axial direction of the magnetic gap 21.
In the present embodiment, the structures of the center magnetic circuit portion 22 and the side magnetic circuit portions 23 may be the same or different, and are not limited herein. As shown in fig. 1 and 2, the central magnetic circuit portion 22 includes a first central washer 221, a central magnet 222, and a second central washer 223 that are stacked in order, the side magnetic circuit portion 23 includes a first side washer 231, a side magnet 232, and a second Bian Huasi 233 that are stacked in order, 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 Bian Huasi, and are each stacked in order along the axial direction of the magnetic gap 21.
It will be appreciated that the center magnet 222 of the center magnetic circuit portion 22 and the side magnet 232 of the side magnetic circuit portion 23 form a magnetic field therebetween and form a ring-shaped magnetic induction line, such that the first and second center washer 221 and 223 of the center magnetic circuit portion 22 and the first and second washer 231 and Bian Huasi 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 selected as magnetic conductive plates, and the first side washer 231 and the second side washer Bian Huasi 233 may be selected as magnetic conductive plates, which have a magnetism collecting effect and can have a homogenizing effect on the magnetic fields generated by the central magnet 222 and the side magnets 232. Alternatively, the center magnet 222 and the side magnets 232 may be selected to be permanent magnets. It is understood that the shape profile of the central magnet 222 may be the same as or different from the shape profile of the first central washer 221 and the second central washer 223, which is not limited herein. The shape profile of the side magnet 232 may be the same as or different from the shape profile of the first side washer 231 and the second side washer Bian Huasi 233, and is not limited thereto.
As shown in fig. 1 and 2, at least a portion of the first coil segment 323 of the voice coil 32 corresponds to the first central washer 221 and the first side washer 231, and at least a portion of the second coil segment 324 of the voice coil 32 corresponds to the second central washer 223 and the second Bian Huasi 233.
By means of 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, the polarized first center washer 221 and the polarized first side washer 231 generate induced electromotive force in the first direction under the action of the magnetic field generated by the magnetic circuit system 2, the second coil section 324 generates induced electromotive force opposite to the first direction under the action of the polarized second center washer 223 and the second Bian Huasi 233, the magnitude of the induced electromotive force of the first coil section 323 is equal to that of the induced electromotive force of the second coil section 324, the directions are opposite, and accordingly the two induced electromotive forces can cancel each other, distortion can be effectively reduced under the condition that the same current is input, electroacoustic conversion efficiency is improved, and the primary hearing sense loudness is larger.
In one embodiment, as shown in fig. 1 and 2, the first central washer 221 and the first side washer 231 have opposite polarities of magnetic poles adjacent to one end of the magnetic gap 21, and the second central washer 223 and the second side washer Bian Huasi 233 have opposite polarities of magnetic poles adjacent to one end of the magnetic gap 21.
It will be appreciated that if the magnetic pole polarity of the first central washer 221 of the central magnetic circuit portion 22 is N, the magnetic pole polarity of the first side washer 231 of the side magnetic circuit portion 23 is S; if the magnetic pole polarity of the first central washer 221 of the central magnetic circuit portion 22 is S-pole, the magnetic pole polarity of the first side washer 231 of the side magnetic circuit portion 23 is N-pole.
Of course, if the magnetic pole polarity of the second central washer 223 of the central magnetic circuit portion 22 is N pole, the magnetic pole polarity of the second Bian Huasi 233 of the side magnetic circuit portion 23 is S pole; if the magnetic pole polarity of the second central washer 223 of the central magnetic circuit portion 22 is S-pole, the magnetic pole polarity of the second Bian Huasi 233 of the side magnetic circuit portion 23 is N-pole.
In one embodiment, as shown in fig. 1 and 2, the first central washer 221 and the second central washer 223 have opposite polarities of the magnetic poles adjacent to the end of the magnetic gap 21, and the first side washer 231 and the second side washer Bian Huasi 233 have opposite polarities of the magnetic poles adjacent to the end of the magnetic gap 21.
It will be appreciated that if the magnetic pole polarity of the first central washer 221 of the central magnetic circuit portion 22 is N, the magnetic pole polarity of the second central washer 223 of the central magnetic circuit portion 22 is S; if the magnetic pole polarity of the first central washer 221 of the central magnetic circuit portion 22 is S-pole, the magnetic pole polarity of the second central washer 223 of the central magnetic circuit portion 22 is N-pole.
Of course, if the magnetic pole polarity of the first side washer 231 of the side magnetic circuit portion 23 is N, the magnetic pole polarity of the second Bian Huasi 233 of the side magnetic circuit portion 23 is S; if the magnetic pole polarity of the first side washer 231 of the side magnetic circuit portion 23 is S-pole, the magnetic pole polarity of the second side Bian Huasi 233 of the side magnetic circuit portion 23 is N-pole.
In one embodiment, as shown in fig. 1 and 2, the width of the magnetic gap 21 is defined as the spacing between the center magnetic circuit portion 22 and the side magnetic circuit portions 23. Alternatively, the width of the magnetic gap 21 ranges from 0.2mm to 0.5mm.
It will be appreciated that setting the width of the magnetic gap 21 to be in the range of 0.2mm to 0.5mm ensures that the magnetic field strength generated by the magnetic circuit system 2 within the magnetic gap 21 is ensured, while also ensuring that the voice coil 32 is not affected within the magnetic gap 21. Alternatively, the width of the magnetic gap 21 is 0.2mm, 0.3mm, 0.4mm, 0.5mm, or the like, which is not limited herein.
In one embodiment, as shown in fig. 1 and 2, 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 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 in the direction of inserting the magnetic gap 21. Alternatively, the thickness of the first central washer 221 is the same as the thickness of the first side washer 231.
In the present embodiment, by setting the length of the first coil section 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, the length of the first coil section 323 within the magnetic gap 21 is ensured to ensure that the first coil section 323 generates a sufficient driving force in the voice coil 32.
In one embodiment, as shown in fig. 1 and 2, 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 Bian Huasi 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 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 Bian Huasi 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 Bian Huasi 233.
In the present embodiment, by setting the length of the second coil segment 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 Bian Huasi 233, the length of the second coil segment 324 within the magnetic gap 21 is ensured to ensure that the second coil segment 324 generates a sufficient driving force in the voice coil 32.
Alternatively, 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 side washer 231 is the same as the thickness of the second Bian Huasi 233. The length of the first coil section 323 along the axial direction of the magnetic gap 21 is the same as the length of the second coil section 324 along 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. 1 and 2, 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 Bian Huasi 233. It will be appreciated that this arrangement ensures that the center magnet 222 and the side magnets 232 of the magnetic circuit 2 generate sufficient magnetic field strength such that the first center washer 221, the second center washer 223, the first side washer 231 and the second side washer Bian Huasi 233 can be polarized.
In an 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.
In this embodiment, as shown in fig. 3 and 4, the voice coil 32 is disposed in a ring shape, so that after one end of the voice coil 32 is connected to the diaphragm 31, the ring-shaped voice coil 32 can drive the diaphragm 31 to vibrate in the circumferential direction, thereby improving the vibration effect of the diaphragm 31 and the acoustic performance of the speaker.
It will be appreciated that by providing voice coil 32 as voice coil tube 321 and voice coil wire 322, voice coil tube 321 is of annular tubular or cylindrical configuration, and voice coil tube 321 provides a mounting or support base for voice coil wire 322. The material of the voice coil tube 321 may be 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 this embodiment, the voice coil wire 322 may be made of a conductive metal wire, such as a copper wire or an aluminum wire, or other metal wire capable of conducting electricity, which is not limited herein. It is understood that the voice coil wire 322 is wound in the circumferential direction of the voice coil bobbin 321 to be fixed on 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.
Alternatively, 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 along the circumferential direction of the voice coil pipe 321 to form an annular coil, and the annular coil extends along the axial direction of the voice coil pipe 321 and is arranged at intervals, that is, the voice coil wire 322 is wound on the voice coil pipe 321 in a spiral manner, at this time, as shown in fig. 3 and fig. 4, one 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 along the circumferential direction of the voice coil pipe 321 is opposite to the winding direction of the second coil section 324 along the circumferential direction of the voice coil pipe 321.
It will be appreciated that when the number of voice coil wires 322 is plural, 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 wound from one end of the voice coil pipe 321 at the same time, and the winding manner of the plurality of voice coil wires 322 is identical to that of one voice coil wire 322 in the above embodiment. When the plurality of voice coil wires 322 are respectively wound from both ends of the voice coil pipe 321, the plurality of voice coil wires 322 form the first coil section 323 and the second coil section 324 at both ends of the voice coil pipe 321, respectively, i.e., 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 pipe 321 in the axial direction thereof; alternatively, a part of the voice coil wires 322 form a first coil section 323 on the voice coil bobbin 321, and the other part of the voice coil wires 322 form a second coil section 324 on the voice coil bobbin 321, which is not limited herein.
In one embodiment, the basin stand 1 comprises a bottom wall 12 and a side wall 13 arranged at the periphery of the bottom wall 12, the side wall 13 and the bottom wall 12 are enclosed to form a mounting cavity 11, the magnetic circuit system 2 is arranged at the bottom wall 12, and the periphery of the vibrating diaphragm 31 is connected with the side wall 13 and enclosed to form a vibrating space; the bottom wall 12 is also provided with a pressure relief hole 14 communicating with the vibration space.
In this embodiment, as shown in fig. 1, the bottom wall 12 and the side wall 13 of the basin stand 1 enclose the installation cavity 11 forming a groove structure, and the central magnetic circuit portion 22 and the side magnetic circuit portion 23 of the magnetic circuit system 2 are both disposed on the bottom wall 12, and the side magnetic circuit portion 23 is located between the central magnetic circuit portion 22 and the side wall 13.
It will be appreciated that the peripheral edge 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 vibrating space when the diaphragm 31 vibrates, the bottom wall 12 is further provided with a pressure relief hole 14 communicating with the vibrating space.
In an embodiment, the bottom wall 12 is convexly provided with a mounting post 16, the magnetic circuit system 2 is further provided with a mounting hole 224 spaced from the magnetic gap 21, the mounting post 16 is disposed in the mounting hole 224 in a penetrating manner, and the pressure release hole 14 is disposed through the bottom wall 12 and the mounting post 16.
As shown in fig. 1, the mounting post 16 is protruded on the bottom wall 12, and the mounting hole 224 is formed 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 mounted by using the mounting post 16, that is, the mounting post 16 is penetrated in the mounting hole 224. It will be appreciated that the mounting holes 224 are spaced from the magnetic gap 21 and the pressure relief holes 14 are provided through the bottom wall 12 and the mounting posts 16.
In an embodiment, the bottom wall 12 is convexly provided with a mounting post 16 and a mounting table 17 arranged around the mounting post 16, the mounting table 17 is provided with a mounting groove 18, the magnetic circuit system 2 is further provided with a mounting hole 224 arranged at intervals with the magnetic gap 21, the mounting post 16 is arranged in the mounting hole 224 in a penetrating manner, part of the magnetic circuit system 2 is accommodated and limited in the mounting groove 18, and the bottom wall 12 of the mounting groove 18 is provided with an avoidance groove 15 corresponding to the magnetic gap 21.
In the present embodiment, as shown in fig. 1, by providing the mounting post 16 and the mounting table 17 on the bottom wall 12 such that the mounting table 17 is provided around the mounting post 16, and providing the mounting groove 18 on the mounting table 17, the center magnetic circuit portion 22 and the side magnetic circuit portion 23 of the spacing magnetic circuit system 2 are mounted with the cooperation of the mounting groove 18 and the mounting post 16.
It will be appreciated that the mounting hole 224 is formed 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 mounted by using the mounting post 16, that is, the mounting post 16 is inserted into the mounting hole 224. It will be appreciated that the mounting holes 224 are spaced from the magnetic gap 21 and the pressure relief holes 14 are provided through the bottom wall 12 and the mounting posts 16.
In the present embodiment, the bottom wall 12 of the mounting groove 18 is provided with the escape groove 15 corresponding to the magnetic gap 21, so that the escape groove 15 provides an escape space for the voice coil 32 to vibrate in the magnetic gap 21.
In one embodiment, the speaker 100 includes a centering pad having one end connected to the housing and the other end connected to the voice coil 32. It will be appreciated that the spider is provided with an inner pad to which the lead portion of the voice coil 32 is soldered.
It can be appreciated that by providing the centering support, the swing limitation of the voice coil 32 in the vibration process is effectively avoided by using the centering support, and meanwhile, the voice coil 32 is connected and conducted with an external circuit by using the centering support. It will be appreciated that the centering tabs may be of unitary construction or may comprise a plurality of centering tabs.
In this embodiment, the centering support is provided with the inner bonding pad and the outer bonding pad, so that the lead portion of the voice coil 32 is soldered with the inner bonding pad, and the outer bonding pad is electrically connected with the external circuit, so that the centering support can be utilized to realize the electrical connection between the voice coil 32 and the external circuit, thereby effectively avoiding the problem that the lead of the voice coil 32 is broken in the vibration process, resulting in unsmooth circuit conduction, and avoiding the swing of the voice coil 32 in the vibration process, and further improving the acoustic performance of the loudspeaker 100.
It can be understood that the centering support piece comprises an inner fixing part, an outer fixing part and an elastic part connected with the inner fixing part and the outer fixing part respectively, wherein the inner fixing part is provided with an inner bonding pad, so that the centering support piece can be fixed on the magnetic circuit system 2 or the basin frame 1 through the outer fixing part, and the installation stability of the centering support piece is improved. Meanwhile, the elastic part can generate sound and elastically deform when the voice coil 32 vibrates, so that the voice coil 32 and an external circuit can be conducted through the centering support piece, and the problems of poor conduction and the like caused by the breakage of a voice coil lead in the vibration process of the voice coil 32 can be avoided.
In one embodiment, the loudspeaker 100 may also eliminate the centering pad, and the thickness is greatly reduced from the axial direction by adding magnetic fluid in the magnetic gap 21 instead of the centering action of the centering pad. Meanwhile, by enlarging the width of the folded ring of the diaphragm 31, more compliance is ensured for the loudspeaker 100, and the problem caused by removing the centering support piece is solved.
The first coil section 323 and the second coil section 324 of the voice coil 32 in the speaker 100 according to the present invention may be formed by winding the same voice coil wire 322, wherein the voice coil wire 322 is wound reversely at the middle of the voice coil tube 321, i.e. at the middle position of the center magnet 222 and the side magnet 232, i.e. as shown in fig. 1 to 4, when the current in the first coil section 323 in the upper voice coil wire 322 is out of the paper surface, the current in the second coil section 324 is in the paper surface.
It can be understood that the polarities of the first central washer 221 and the first side washer 231 and the second central washer 223 and the second Bian Huasi 233 at the left end and the right end of the magnetic gap 11 are opposite, that is, as shown in fig. 1, when the first side washer 231 at the left end of the magnetic gap 11 is S-pole, the first central washer 221 at the right end of the magnetic gap 11 is N-pole, the magnetic induction line at the upper end of the magnetic gap 11 is from right to left, and the driving force generated by the first coil section 323 is upward according to the rule of left hand; the second Bian Huasi 233 at the left end of the magnetic gap 11 is an N pole, the second central washer 223 at the right end of the magnetic gap 11 is an S pole, and the magnetic induction lines at the lower end of the magnetic gap 11 are directed upward by the driving force generated by the second coil section 324 according to the left hand rule from left to right. The stress directions of the first coil section 323 and the second coil section 324 are consistent, and meanwhile, the voice coil pipe 321 is driven to move up and down, so that the vibrating diaphragm is pushed to radiate sound outwards. Compared with a conventional loudspeaker magnetic circuit system, the electroacoustic conversion efficiency is higher and the loudness is larger under the same power.
When the first coil section 323 and the second coil section 324 move upward to the highest stroke, in the conventional speaker design, the voice coil 321 is driven downward by the bending ring and the centering support of the diaphragm 31, so that the voice coil 321 moves downward, but according to the left hand rule, the voice coil 32 is driven upward, but the induction lines are cut in the downward movement process, and the 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 electroacoustic conversion efficiency is low. However, in the solution 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 because the first coil section 323 and the second coil section 324 are communicated, these two induced electromotive forces cancel each other, which is equivalent to that the input current can be used to push the diaphragm 31 to sound outwards to the greatest extent, i.e. the electroacoustic conversion efficiency is high, and the subjective hearing loudness is larger. In addition, no anti-electric obstruction exists, subjective tone quality is cleaner, and distortion is greatly reduced. At the same time, the loudness improvement is further increased because the first coil segment 323 and the second coil segment 324 are driven within the magnetic gap 11.
The invention also provides an electronic device, which comprises a device shell and the loudspeaker 100, wherein the loudspeaker 100 is arranged in the device shell. The specific structure of the speaker 100 refers to the foregoing embodiments, and since the electronic device adopts all the technical solutions of all the foregoing embodiments, at least the beneficial effects of the technical solutions of the foregoing embodiments are all provided, and will not be described in detail herein.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (7)
1. A loudspeaker, the loudspeaker comprising:
the basin frame is of an integrated structure, the basin frame comprises a bottom wall and a side wall arranged on the periphery of the bottom wall, a mounting cavity is formed by enclosing the side wall and the bottom wall, the mounting cavity is of a cavity structure with one end open and one end closed, so that the basin frame is of a groove structure, and mounting columns are convexly arranged on the bottom wall;
the magnetic circuit system is arranged in the mounting cavity and is arranged on the bottom wall, the magnetic circuit system comprises a central magnetic circuit part and a side magnetic circuit part, the side magnetic circuit part is arranged on the outer side of the central magnetic circuit part and is spaced with the central magnetic circuit part to limit a magnetic gap, the central magnetic circuit part is also provided with a mounting hole which is spaced with the magnetic gap, the mounting column penetrates through the mounting hole, the central magnetic circuit part 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 Bian Huasi, wherein the first side washer, the side magnet and the second side Bian Huasi are sequentially stacked along the axial direction of the magnetic gap; and
The vibration system comprises a vibrating diaphragm and a voice coil, wherein the periphery of the vibrating diaphragm is connected with the side wall and surrounds the vibrating diaphragm to form a vibration space, the vibrating diaphragm is arranged opposite to the magnetic circuit, one end of the voice coil is connected with the vibrating diaphragm, 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 length of the first coil section along the axial direction of the magnetic gap is greater than or equal to 2 times the thickness of the first central washer or the first side washer, the length of the second coil section along the axial direction of the magnetic gap is greater than or equal to 2 times the thickness of the second central washer or the second Bian Huasi, and the length of the first coil section along the axial direction of the magnetic gap is the same as the length of the second coil section along the axial direction of the magnetic gap;
the bottom wall is further provided with a pressure relief hole communicated with the vibration space, and the pressure relief hole penetrates through the bottom wall and the mounting column.
2. The speaker of claim 1 wherein the first central washer and the first side washer have opposite polarity poles adjacent one end of the magnetic gap and the second central washer and the second side washer have opposite polarity poles adjacent one end of the magnetic gap;
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 side washer and the second side washer Bian Huasi adjacent to one end of the magnetic gap are opposite.
3. The loudspeaker of claim 1, wherein the magnetic gap has a width in the range of 0.2mm to 0.5mm;
and/or the thickness of the central magnet is greater than or equal to 4 times the thickness of the first central washer or the second central washer;
and/or the thickness of the side magnet is greater than or equal to 4 times the thickness of the first side washer or the second side washer Bian Huasi.
4. The loudspeaker of 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 along an axial direction of the voice coil tube.
5. The speaker of claim 4, wherein the first coil segment and the second coil segment are connected at adjacent ends thereof, and wherein a winding direction of the first coil segment in a circumferential direction of the voice coil tube is opposite to a winding direction of the second coil segment in the circumferential direction of the voice coil tube.
6. The loudspeaker of any one of claims 1 to 5, wherein the bottom wall projection is further provided with a mounting table arranged around the mounting post, the mounting table is provided with a mounting groove, a part of the magnetic circuit system is accommodated and limited in the mounting groove, and a bottom wall of the mounting groove is provided with an avoidance groove corresponding to the magnetic gap.
7. An electronic device comprising a device housing and a speaker according to any one of claims 1 to 6, the speaker being provided in the device housing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210150942.2A CN114466289B (en) | 2022-02-18 | 2022-02-18 | Speaker and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210150942.2A CN114466289B (en) | 2022-02-18 | 2022-02-18 | Speaker and electronic device |
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| CN114466289B true CN114466289B (en) | 2024-03-12 |
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| CN114466289A (en) | 2022-05-10 |
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