CN114363778A - Sound production device and electronic equipment - Google Patents
Sound production device and electronic equipment Download PDFInfo
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- CN114363778A CN114363778A CN202111677055.2A CN202111677055A CN114363778A CN 114363778 A CN114363778 A CN 114363778A CN 202111677055 A CN202111677055 A CN 202111677055A CN 114363778 A CN114363778 A CN 114363778A
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Abstract
The invention discloses a sound generating device and electronic equipment, wherein the sound generating device comprises a magnetic circuit system, a vibration system and a centering disk, the magnetic circuit system is provided with a magnetic gap, the magnetic circuit system is arranged in a hollow mode to limit a containing space, the vibration system comprises a vibration diaphragm assembly, a voice coil and a framework, the vibration diaphragm assembly is located in the containing space, the voice coil is inserted into the magnetic gap, the first end of the framework is connected with the vibration diaphragm assembly, the second end of the framework extends into the magnetic gap and is connected with the voice coil, the voice coil drives the vibration diaphragm assembly to vibrate through the framework, the inner end of the centering disk is connected with the second end of the framework, the centering disk is provided with an inner bonding pad and an outer bonding pad, the lead part of the voice coil is welded with the inner bonding pad, and the outer bonding pad is electrically connected with an external circuit. The sound generating device provided by the invention not only greatly reduces the thickness and size of the sound generating device, but also effectively reduces high-frequency resonance, improves the acoustic performance, is convenient to process and assemble, and simultaneously avoids the problems of voice coil swing, unsmooth voice coil circuit conduction and the like.
Description
Technical Field
The invention relates to the technical field of electroacoustic conversion, in particular to a sound generating device and electronic equipment using the same.
Background
With the rapid development of science and technology, people have higher and higher requirements on the tone quality of electronic equipment, and a sounding device in the electronic equipment is influenced by the appearance structure of the electronic equipment, so that the volume of the sounding device is smaller and smaller. The sound generating device is an important and indispensable functional component of the electronic device, and is an important part of the light and thin design of the electronic device, so the light and thin design of the sound generating device is very important.
In the related art, in order to reduce the volume of the electronic device, a sound generating device is proposed, which includes a magnetic circuit system and a vibration system disposed around the magnetic circuit system, an inner side of a diaphragm of the vibration system is fixedly connected to the magnetic circuit system, and an outer side of the diaphragm is connected to a housing of the sound generating device. The structure can reduce the thickness of the sounding device to a certain extent, and plays a role in thinning the electronic equipment. However, the above structure design is complicated, which is inconvenient to process and assemble, and the connection mode between the voice coil lead of the sound production device and the external circuit is complicated, and the voice coil still has polarization in the vibration process, thereby affecting the sound production effect of the sound production device.
Disclosure of Invention
The invention mainly aims to provide a sound generating device and electronic equipment, and aims to provide the sound generating device capable of effectively reducing the thickness of a product.
In order to achieve the above object, the present invention provides a sound generating device, including:
the magnetic circuit system is provided with a magnetic gap and is arranged in a hollow manner to limit an accommodating space;
the vibration system comprises a vibration diaphragm assembly, a voice coil and a framework, the vibration diaphragm assembly is located in the containing space, the voice coil is inserted into the magnetic gap, a first end of the framework is connected with the vibration diaphragm assembly, a second end of the framework extends into the magnetic gap and is connected with the voice coil, and the voice coil drives the vibration diaphragm assembly to vibrate through the framework; and
the inner of the centering support sheet is connected with the second end of the framework, the centering support sheet is provided with an inner bonding pad and an outer bonding pad, the lead part of the voice coil is welded with the inner bonding pad, and the outer bonding pad is electrically connected with an external circuit.
In one embodiment, the outer end of the centering branch piece is fixed on the magnetic circuit system;
or, the sound generating device further comprises a shell, the magnetic circuit system and the vibration system are arranged in the shell, and the outer end of the centering support piece is fixed on the shell.
In one embodiment, the magnetic circuit system is arranged in a square shape;
the number of the centering branch pieces is two, avoidance ports are formed in at least one pair of diagonal positions of the magnetic circuit system, one centering branch piece is arranged in each avoidance port, and two ends of each centering branch piece are respectively connected with the framework and the shell; or, the number of the centering branch pieces is four, avoidance ports are arranged at four diagonal positions of the magnetic circuit system, one centering branch piece is arranged in each avoidance port, and two ends of each centering branch piece are respectively connected with the framework and the shell.
In an embodiment, the framework comprises a supporting portion and an extending portion, the supporting portion is arranged in an annular shape, one end of the supporting portion is connected with the vibrating diaphragm assembly, the extending portion is arranged at the other end of the supporting portion, the extending portion extends into the magnetic gap and is connected with the voice coil, and the inner end of the centering disk is connected with the extending portion.
In one embodiment, the magnetic circuit system is arranged in a square shape;
the two extending parts are distributed at intervals along the circumferential direction of the supporting part, extend into the magnetic gap respectively through a pair of diagonal positions of the magnetic circuit system and are connected with the voice coil; or, the number of the extension parts is four, the four extension parts are distributed at intervals along the circumferential direction of the support part, and the four extension parts respectively extend into the magnetic gap through four diagonal positions of the magnetic circuit system and are connected with the voice coil.
In an embodiment, the number of the centering branch pieces is the same as that of the extending portions, and the plurality of centering branch pieces and the plurality of extending portions are arranged in a one-to-one correspondence manner.
In one embodiment, one end of the extension portion connected to the voice coil includes a first fixing portion and a second fixing portion, the first fixing portion is formed in a circular arc shape and connected to the voice coil, the second fixing portion is formed in a long strip shape, and the inner pad of the spider is fixed to the second fixing portion.
In one embodiment, the support portion and the extension portion are formed as an integral molding;
or, the support part and the extension part are welded or bonded.
In one embodiment, the magnetic circuit system comprises:
a central magnetic circuit portion which is arranged in a hollow manner to define the accommodating space;
a side magnetic path portion provided on an outer periphery of the central magnetic path portion and spaced apart from the central magnetic path portion to define the magnetic gap; and
a yoke to which the center magnetic path portion and the side magnetic path portions are fixed, respectively;
the central magnetic circuit part is provided with a first avoidance port, and the framework penetrates through the first avoidance port and is connected with the voice coil.
In an embodiment, the central magnetic circuit portion includes a first long side portion and a first short side portion arranged in sequence, the first long side portion and the first short side portion are separately disposed and enclose to form the accommodating space, and the first long side portion and the adjacent first short side portion are disposed at an interval to define the first avoidance opening.
In one embodiment, the side magnetic circuit part comprises a second long side part and a second short side part which are sequentially arranged, the second long side part and the second short side part are separately arranged, and the second long side part and the adjacent second short side part are arranged at intervals to define a second avoidance port communicated with the first avoidance port.
In an embodiment, the side magnetic circuit part comprises a first side magnet, a side washer and a second side magnet which are sequentially stacked, the first side magnet and the second side magnet are magnetized in the vertical direction and opposite in magnetizing direction, the second side magnet is fixed on the magnetic yoke, the sound generating device further comprises a shell, the shell comprises a metal cover plate, and the metal cover plate is arranged on one side, away from the side washer, of the first side magnet in a covering mode.
In one embodiment, the diaphragm assembly includes a diaphragm and a dome, the dome is connected to the diaphragm and located at a center of the diaphragm, and an edge portion of the diaphragm is connected to the housing.
In one embodiment, the housing further comprises a plastic part integrally injection-molded with the metal cover plate;
the edge part of the vibrating diaphragm and the plastic part are integrally injection molded; or the edge part of the vibrating diaphragm and the plastic part are integrally hot-pressed and molded; or the edge part of the vibrating diaphragm is connected with the plastic part in an adhesive mode.
In an embodiment, the central magnetic circuit portion includes a first central magnet, a central washer and a second central magnet, which are stacked in sequence, the first central magnet and the second central magnet are magnetized in a vertical direction and in opposite directions, the second central magnet is fixed to the magnetic yoke, and the metal cover plate covers both the first side magnet and the first central magnet on a side away from the magnetic yoke.
In one embodiment, the side magnetic circuit part comprises a first side washer, a first side magnet, a second side washer and a second side magnet which are sequentially stacked, the first side magnet and the second side magnet are magnetized along the vertical direction and have opposite magnetizing directions, and the second side magnet is fixed on the magnetic yoke;
and/or the central magnetic circuit part comprises a first central washer, a first central magnet, a second central washer and a second central magnet which are sequentially stacked, the first central magnet and the second central magnet are magnetized in the vertical direction and in opposite directions, the second central magnet is fixed on the magnetic guide yoke, and the periphery of the diaphragm component is fixed on the first central washer.
In one embodiment, the diaphragm assembly includes a diaphragm and a dome, the dome is connected to the diaphragm and located at the center of the diaphragm, one end of the bobbin is connected to the dome, and the other end of the bobbin extends into the magnetic gap and is connected to the voice coil.
In one embodiment, in the vertical direction, a distance between a top surface of the dome and the bottom wall of the accommodating space is smaller than a distance between a top surface of the magnetic circuit system and the bottom wall of the accommodating space.
In one embodiment, the dome and the armature are formed as an integrally formed piece of metal.
The invention also provides electronic equipment comprising the sound generating device.
According to the sound generating device, the magnetic gap is arranged in the magnetic circuit system, and the magnetic circuit system is arranged in a hollow mode, so that the containing space is defined in the middle of the magnetic circuit system, the containing space of the magnetic circuit system is used for containing the vibrating diaphragm assembly of the vibrating system, namely, the vibrating radiation surface is placed in the middle of the magnetic circuit system, the thickness of the magnetic circuit system is parallel to the vibrating height of the vibrating diaphragm assembly, the thickness and the size of the sound generating device can be greatly reduced, in addition, the structure of the sound generating device can be simplified by arranging the magnetic circuit system on the periphery of the vibrating diaphragm assembly, and the processing and the assembly are convenient; the voice coil is inserted into the magnetic gap and connected with the vibrating diaphragm assembly through one end of the framework, and the other end of the framework extends into the magnetic gap and is connected with the voice coil, so that the voice coil is connected with the vibration radiation surface of the vibrating diaphragm assembly through the framework, the motion load is transmitted, the torsional rigidity is improved through the framework, the high-frequency resonance is effectively reduced, and the acoustic performance is improved; simultaneously, through setting up the centering piece, the inner that utilizes the centering piece is held with the second of skeleton and is linked to each other, and be equipped with interior pad and outer pad at the centering piece, make the lead wire portion and the interior pad welding of voice coil loudspeaker voice coil, outer pad is connected with external circuit electricity, thereby effectively avoid the voice coil loudspeaker voice coil to take place the lead wire fracture at the vibration in-process, lead to the not smooth problem of circuit conduction, still do benefit to the centering piece simultaneously and play the effect of stabilizing the skeleton vibration, avoid the voice coil loudspeaker voice coil vibration in-process to take place the swing, thereby further improve sound generating mechanism's acoustic performance.
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 structural diagram of a sound generating device according to an embodiment of the present invention;
FIG. 2 is an exploded view of the sound generator according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a sound generator according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a sound generating device with a housing and a diaphragm assembly removed according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a sound generating device with a housing and a magnetic circuit removed in accordance with an embodiment of the present invention;
FIG. 6 is an exploded view of FIG. 5;
fig. 7 is a partially exploded view of a vibration system in accordance with an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
14 | Magnetic |
| 1 | |
15 | |
| 11 | |
2 | |
| 12 | Central |
21 | |
| 121 | |
211 | Vibrating |
| 122 | First avoiding |
213 | Ball top |
| 123 | First |
22 | |
| 124 | First |
23 | |
| 126 | |
231 | Supporting |
| 127 | |
232 | |
| 13 | Side |
2321 | First |
| 131 | Second |
2322 | Second |
| 132 | Second |
3 | |
| 133 | Second avoiding |
31 | |
| 134 | First side magnet | 4 | |
| 135 | |
41 | |
| 136 | |
42 | Plastic part |
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 the directional indicators (such as up, down, 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 provides a sound generating device 100. It is understood that the sound generating apparatus 100 can be applied to electronic devices such as a sound box, an earphone, a mobile phone, and the like, and is not limited herein.
Referring to fig. 1 to 7, in an embodiment of the present invention, the sound generating device 100 includes a magnetic circuit system 1, a vibration system 2, and a centering pad 3, wherein the magnetic circuit system 1 has a magnetic gap 11, the magnetic circuit system 1 is hollow to define an accommodating space 121, the vibration system 2 includes a diaphragm assembly 21, a voice coil 22, and a bobbin 23, the diaphragm assembly 21 is located in the accommodating space 121, the voice coil 22 is inserted into the magnetic gap 11, a first end of the bobbin 23 is connected to the diaphragm assembly 21, a second end of the bobbin 23 extends into the magnetic gap 11 and is connected to the voice coil 22, the voice coil 22 drives the diaphragm assembly 21 to vibrate through the bobbin 23, an inner end of the centering pad 3 is connected to a second end of the bobbin 23, the centering pad 3 has an inner bonding pad 31 and an outer bonding pad (not shown), a lead portion of the voice coil 22 is welded to the inner bonding pad 31, and the outer bonding pad is electrically connected to an external circuit.
In this embodiment, the magnetic circuit system 1 and the vibration system 2 constitute a main structure of the sound generating apparatus 100, a magnetic gap 11 is disposed in the magnetic circuit system 1, the voice coil 22 of the vibration system 2 is inserted into the magnetic gap 11, when the voice coil 22 is connected to an external power source, the voice coil 22 is used to transmit electric energy to the magnetic gap 11 of the magnetic circuit system 1, and under the action of magnetic lines of force generated by the magnetic gap 11, the voice coil 22 moves up and down, that is, the magnetic field generated by the magnetic circuit system 1 is used to convert the electric energy into mechanical energy, so that the voice coil 22 vibrates.
It can be understood that magnetic circuit 1 is a hollow setting, and defines accommodation space 121, through locating vibrating diaphragm assembly 21 of vibration system 2 in accommodation space 121, also place the vibration radiation surface of vibrating diaphragm assembly 21 in the middle of magnetic circuit 1, thereby effectively reduce the thickness dimension of sound generating mechanism 100, and utilize one end of skeleton 23 to link to each other with vibrating diaphragm assembly 21, the other end of skeleton 23 stretches into magnetic gap 11, and links to each other with voice coil 22, so when voice coil 22 takes place the vibration, drive vibrating diaphragm assembly 21 through skeleton 23 and vibrate.
In this embodiment, after receiving an externally varying alternating current signal through the voice coil 22 disposed in the magnetic gap 11, the voice coil 22 is driven by the magnetic field force of the magnetic circuit system 1 to perform a reciprocating motion of cutting magnetic lines of force, so that the voice coil 22 moves up and down, and the framework 23 drives the diaphragm assembly 21 of the vibration system 2 to vibrate and generate sound. It can be understood that the voice coil 22 is connected with the vibration radiation surface of the diaphragm assembly 21 through the framework 23, the motion load is transmitted, and the torsional rigidity is improved by the framework 23, so that the high-frequency resonance is effectively reduced, and the acoustic performance is improved.
It can be understood that, by defining the accommodating space 121 in the middle of the magnetic circuit system 1 and accommodating the diaphragm assembly 21 in the accommodating space 121, the thickness of the magnetic circuit system 1 and the vibration height of the diaphragm assembly 21 can be made parallel, rather than being added, and the thickness dimension of the sound generating device 100 can be reduced. Meanwhile, the diaphragm assembly 21 and the portion of the magnetic circuit system 1 around the accommodating space 121 form a short sound-emitting channel, which is beneficial to vibration propagation. Meanwhile, the above-mentioned structure arrangement can facilitate the fixing and installation of the diaphragm assembly 21, thereby simplifying the assembly process of the sound generating apparatus 100.
In this embodiment, through setting up centering branch piece 3, and set up inner pad 31 and outer pad on centering branch piece 3, make the inner of centering branch piece 3 link to each other with the second end of skeleton 23, and the lead wire portion and the inner pad 31 welding of voice coil 22, the outer pad is connected with the external circuit electricity, so usable centering branch piece 3 realizes the electricity between voice coil 22 and the external circuit and is connected, effectively avoid voice coil 22 to take place the lead wire fracture at the vibration in-process, lead to the not smooth problem of circuit conduction, centering branch piece 3 still plays the effect of stabilizing skeleton 23 vibration simultaneously, avoid voice coil 22 to vibrate in-process and take place the swing, thereby further improve sound generating apparatus 100's acoustic performance.
According to the sound generating device 100, the magnetic gap 11 is arranged in the magnetic circuit system 1, and the magnetic circuit system 1 is arranged in a hollow manner, so that the accommodating space 121 is defined in the middle of the magnetic circuit system 1, the diaphragm component 21 of the vibration system 2 is accommodated in the accommodating space 121 of the magnetic circuit system 1, namely, the vibration radiation surface is placed in the middle of the magnetic circuit system 1, so that the thickness of the magnetic circuit system 1 is parallel to the vibration height of the diaphragm component 21, the thickness size of the sound generating device 100 can be reduced, and the magnetic circuit system 1 is arranged on the periphery of the diaphragm component 21, so that the mounting and fixing of the diaphragm component 21 can be facilitated; the voice coil 22 is inserted into the magnetic gap 11 and connected with the vibrating diaphragm assembly 21 through one end of the framework 23, and the other end of the framework 23 extends into the magnetic gap 11 and is connected with the voice coil 22, so that the voice coil 22 is connected with the vibration radiation surface of the vibrating diaphragm assembly 21 through the framework 23, the motion load is transmitted, the torsional rigidity is improved through the framework 23, the high-frequency resonance is effectively reduced, and the acoustic performance is improved; simultaneously, through setting up centering disk 3, the inner that utilizes centering disk 3 links to each other with the second end of skeleton 23, and be equipped with inner pad 31 at centering disk 3, make the lead wire portion and the welding of inner pad 31 of voice coil loudspeaker voice coil 22, thereby effectively avoid voice coil loudspeaker voice coil 22 to take place the lead wire fracture at the vibration in-process, lead to the not smooth problem of circuit conduction, still do benefit to centering disk 3 simultaneously and play the effect of stabilizing skeleton 23 vibration, avoid voice coil loudspeaker voice coil 22 vibration in-process to take place the swing, thereby further improve sound generating mechanism 100's acoustic performance.
In one embodiment, the outer end of the centering disk 3 is fixed to the magnetic circuit system 1. It can be understood that the centering branch piece 3 includes an inner fixing portion, an outer fixing portion and an elastic portion respectively connected to the inner fixing portion and the outer fixing portion, the inner fixing portion is provided with an inner pad 31, so that the centering branch piece 3 can be fixed to the magnetic circuit system 1 through the outer fixing portion, thereby improving the installation stability of the centering branch piece 3. Meanwhile, the elastic part can generate sound and elastically deform when the voice coil 22 vibrates, so that the voice coil 22 can be conducted with an external circuit through the centering support piece 3, and the problems of unsmooth conduction and the like caused by the fact that the lead of the voice coil is broken in the vibration process of the voice coil 22 can be solved.
In this embodiment, the inner fixing portion at the inner end of the centering branch piece 3 is further connected to the second end of the bobbin 23, so that the centering branch piece 3 can be used to further stabilize the bobbin 23, thereby further avoiding the swing phenomenon of the voice coil 22 during the vibration process and improving the acoustic performance of the sound generating apparatus 100.
In one embodiment, the sound generating apparatus 100 further includes a housing 4, the magnetic circuit system 1 and the vibration system 2 are both disposed in the housing 4, and the outer end of the centering branch piece 3 is fixed to the housing 4. It can be understood that the magnetic circuit system 1 and the vibration system 2 are conveniently installed and fixed by the housing 4 through the provision of the housing 4, so as to protect the magnetic circuit system 1 and the vibration system 2.
In the present embodiment, the damper 3 may be fixed to the housing 4 by the outer fixing portion, thereby improving the mounting stability of the damper 3. Meanwhile, the elastic part of the centering support 3 is elastically deformed in the vibration process of the voice coil 22, so that the voice coil 22 can be conducted with an external circuit through the centering support 3, and the problems of unsmooth conduction and the like caused by the breakage of a lead of the voice coil in the vibration process of the voice coil 22 can be solved. It can be understood that the inner fixing portion at the inner end of the centering branch piece 3 is further connected to the second end of the bobbin 23, so that the centering branch piece 3 can be utilized to further stabilize the bobbin 23, thereby further avoiding the swing phenomenon of the voice coil 22 during the vibration process and improving the acoustic performance of the sound generating apparatus 100.
Through setting up spider 3 to utilize spider 3 to effectively avoid the swing of voice coil 22 appearance at the vibration in-process to prescribe a limit to, utilize spider 3 to realize voice coil 22 and external circuit connection and switch on simultaneously, and play the effect of stabilizing skeleton 23 vibration. It will be appreciated that the centring disk 3 may be of one integral construction or may comprise a plurality of centring disks.
In one embodiment, the magnetic circuit system 1 is square, the number of the centering branch pieces 3 is two, avoidance openings 15 are arranged at least one pair of diagonal positions of the magnetic circuit system 1, one centering branch piece 3 is arranged in each avoidance opening 15, and two ends of each centering branch piece 3 are respectively connected with the framework 23 and the shell 4.
It can be understood that, as shown in fig. 2 and 4, by providing the avoiding opening 15 on the magnetic circuit system 1, the avoiding opening 15 is conveniently utilized to provide an installation space for the damper 3, so that the damper 3 can be installed, and the increase of the thickness of the sound generating device 100 can be avoided.
In this embodiment, two centering fins 3 are selected, avoidance holes 15 are formed in at least one pair of diagonal positions of the magnetic circuit system 1, so that one centering fin 3 is arranged in each avoidance hole 15, two ends of each centering fin 3 are respectively connected with the framework 23 and the shell 4, that is, the outer fixing portion of each centering fin 3 is connected with the shell 4, and the elastic portion of each centering fin 3 is connected with the framework 23. It can be understood that the escape opening 15 of the magnetic circuit system 1 communicates with the magnetic gap 11, so that the elastic part of the centering branch piece 3 can be conveniently connected with the framework 23 extending into the magnetic gap 11.
Of course, in other embodiments, the avoiding opening 15 may be only used for installing the limiting centralizer 3, the avoiding opening 15 is not connected to the magnetic gap 11 or the accommodating space 121, and at this time, the elastic portion of the centralizer 3 may be bent to achieve connection with the framework 23, which is not limited herein.
In an embodiment, the magnetic circuit system 1 is square, the number of the centering branch pieces 3 is four, the avoiding openings 15 are formed in four diagonal positions of the magnetic circuit system 1, one centering branch piece 3 is arranged in each avoiding opening 15, and two ends of each centering branch piece 3 are connected with the framework 23 and the shell 4 respectively.
It can be understood that, as shown in fig. 2 and fig. 4 to fig. 6, the number of the centering branch pieces 3 can be four, and four diagonal positions of the magnetic circuit system 1 are provided with the avoiding opening 15, so that one centering branch piece 3 is arranged in each avoiding opening 15, and two ends of each centering branch piece 3 are respectively connected with the framework 23 and the housing 4, thereby further improving the connection stability and the vibration balance of the framework 23, and effectively avoiding the phenomena of the voice coil 22 such as swinging in the vibration process.
In an embodiment, the bobbin 23 includes a supporting portion 231 and an extending portion 232, the supporting portion 231 is disposed in a ring shape, one end of the supporting portion 231 is connected to the diaphragm assembly 21, the extending portion 232 is disposed at the other end of the supporting portion 231, the extending portion 232 extends into the magnetic gap 11 and is connected to the voice coil 22, and the inner end of the centering support 3 is connected to the extending portion 232.
In the present embodiment, as shown in fig. 2, 4 to 7, the framework 23 is provided with the supporting portion 231 and the extending portion 232, so that the supporting portion 231 is disposed in a ring shape, and the supporting portion 231 is connected to the dome 213 of the diaphragm assembly 21, thereby realizing vibration transmission on the one hand and saving the cost of the framework 23 on the other hand. It is understood that the extension 232 is disposed at the other end of the supporting portion 231, so that the extension 232 can extend into the magnetic gap 11 through the first avoiding opening 122 and is connected to the voice coil 22.
It can be understood that the annular support 231 of the framework 23 is connected with the dome 213, which is beneficial to improving torsional rigidity of the framework 23 and reducing high-frequency resonance. Optionally, the supporting portion 231 is a rectangular ring, the four corners of the supporting portion 231 are symmetrically provided with extending portions 232, and the bending portions of the extending portions 232 are connected to the fixed voice coil 22.
In this embodiment, the inner end of the damper 3 is connected to the extension 232. It can be understood that the avoiding opening 15 of the magnetic circuit system 1 is communicated with the magnetic gap 11, so that the extending portion 232 of the framework 23 can conveniently extend into the avoiding opening 15 from the magnetic gap 11 and is connected with the elastic portion of the centering branch piece 3. Of course, in other embodiments, the avoiding opening 15 of the magnetic circuit system 1 is not communicated with the magnetic gap 11, and at this time, the extending portion 232 of the framework 23 or the elastic portion of the damper 3 is bent, so that the extending portion 232 of the framework 23 and the elastic portion of the damper 3 are connected from the upper end or the lower end of the magnetic circuit system 1, which is not limited herein.
In an embodiment, the magnetic circuit system 1 is disposed in a square shape, the number of the extension portions 232 is two, the two extension portions 232 are distributed at intervals along the circumferential direction of the supporting portion 231, and the two extension portions 232 respectively extend into the magnetic gap 11 through a pair of opposite angular positions of the magnetic circuit system 1 and are connected to the voice coil 22.
It can be understood that the central magnetic circuit portion 12 of the magnetic circuit system 1 is provided with the first avoiding opening 122 corresponding to the two extending portions 232, respectively, so that the two extending portions 232 respectively extend into the magnetic gap 11 through a pair of opposite positions of the magnetic circuit system 1 and are connected to the voice coil 22. Optionally, the two first avoidance holes 122 are located at a pair of diagonal positions of the central magnetic circuit portion 12, so that not only can the balanced placement of the bobbin 23 be achieved, but also the voice coil 22 can drive the diaphragm 211 to vibrate smoothly through the bobbin 23.
In another embodiment, the magnetic circuit system 1 is square, the number of the extending portions 232 is four, the four extending portions 232 are distributed at intervals along the circumferential direction of the supporting portion 231, and the four extending portions 232 respectively extend into the magnetic gap 11 through four diagonal positions of the magnetic circuit system 1 and are connected to the voice coil 22.
It can be understood that the four diagonal positions of the central magnetic circuit portion 12 of the magnetic circuit system 1 are provided with the first avoidance openings 122, and the four extension portions 232 respectively extend into the magnetic gap 11 through the four diagonal positions of the magnetic circuit system 1 and are connected to the voice coil 22. By such an arrangement, the stability of the connection of the voice coil 22 and the diaphragm 211 through the bobbin 23 can be effectively improved.
Optionally, the number of the centering fins 3 is the same as that of the extending portions 232, and the plurality of centering fins 3 are disposed in one-to-one correspondence with the plurality of extending portions 232. By such an arrangement, not only can the connection stability and the vibration balance of the framework 23 be improved, but also the phenomena of swinging and the like of the voice coil 22 in the vibration process can be effectively avoided.
In a specific example of the present invention, four centering fins 3 may be selected, the framework 23 includes a supporting portion 231 and four extending portions 232, the supporting portion 231 is disposed in an annular shape, the four extending portions 232 are distributed at intervals along a circumferential direction of the supporting portion 231, the four extending portions 232 are respectively inserted into the avoidance ports 15 at four diagonal positions of the magnetic circuit system 1, the four centering fins 3 are correspondingly disposed at the four avoidance ports 15, an inner end of each centering fin 3 is connected to the corresponding extending portion 232, and an outer end of each centering fin 3 is connected to the housing of the sound generating apparatus 100.
In one embodiment, the supporting portion 231 and the extending portion 232 are formed as an integral molding. It is understood that such an arrangement is advantageous to improve the connection strength of the supporting portion 231 and the extending portion 232, so that the structural strength of the framework 23 can be improved. Of course, the support portion 231 and the extension portion 232 are welded or adhesively connected, and not limited herein.
In an embodiment, an end of the extension 232 connected to the voice coil 22 includes a first fixing portion 2321 and a second fixing portion 2322, the first fixing portion 2321 is formed in a circular arc shape and connected to the voice coil 22, the second fixing portion 2322 is formed in a long strip shape, and the inner pad 31 of the spider 3 is fixed to the second fixing portion 2322.
In the present embodiment, as shown in fig. 2, 4 to 7, the first fixing portion 2321 and the second fixing portion 2322 are disposed on the extension portion 232 of the bobbin 23, so that the bobbin 23 can be connected to both the voice coil 22 and the damper 3 by the extension portion 232. It can be understood that the extension portion 232 of the framework 23 is made of a metal material, or a circuit for connecting and conducting the inner pad 31 of the centering leg 3 and the voice coil 22 is disposed in the second fixing portion 2322 of the extension portion 232, which is not limited herein.
Optionally, the first fixing portion 2321 of the extension portion 232 is optionally formed in an arc shape, so that the first fixing portion 2321 can be conveniently connected with the annular voice coil 22, the contact area is increased, and the connection stability is improved. By forming the second fixing portion 2322 into a long strip shape, the inner pad 31 of the spider 3 is conveniently fixed to the second fixing portion 2322, so that the contact area between the inner pad 31 and the second fixing portion 2322 can be increased, the connection stability is improved, and the voice coil 22 and the inner pad 31 of the spider 3 can be sequentially connected on the extension portion 232 of the bobbin 23, thereby avoiding interference.
In one embodiment, the magnetic circuit system 1 includes a central magnetic circuit portion 12, a side magnetic circuit portion 13 and a magnetic yoke 14, wherein the central magnetic circuit portion 12 is disposed in a hollow manner to define a receiving space 121, the side magnetic circuit portion 13 is disposed at an outer periphery of the central magnetic circuit portion 12 and is spaced apart from the central magnetic circuit portion 12 to define a magnetic gap 11, and the central magnetic circuit portion 12 and the side magnetic circuit portion 13 are respectively fixed to the magnetic yoke 14; wherein, the central magnetic circuit portion 12 is provided with a first avoiding opening 122, and the bobbin 23 passes through the first avoiding opening 122 and is connected to the voice coil 22.
In the present embodiment, as shown in fig. 2 to 4, the central magnetic circuit portion 12 and the side magnetic circuit portion 13 of the magnetic circuit system 1 are both fixed to the side of the magnetic yoke 14 facing the diaphragm assembly 21, the side magnetic circuit portion 13 is located on the outer peripheral side of the central magnetic circuit portion 12, and the side magnetic circuit portion 13 is spaced from the central magnetic circuit portion 12 to define the magnetic gap 11, so that a stronger magnetic field is formed in the magnetic gap 11 by the central magnetic circuit portion 12 and the side magnetic circuit portion 13 to improve the driving force of the voice coil 22 inserted in the magnetic gap 11. The middle of the central magnetic circuit portion 12 is hollow, so that an accommodating space 121 is formed in the middle of the central magnetic circuit portion 12, the diaphragm assembly 21 is accommodated in the accommodating space 121, the thickness of the magnetic circuit system 1 is parallel to the vibration height of the diaphragm assembly 21, and the thickness of the sound generating device 100 can be reduced.
It is understood that the central magnetic path portion 12 of the magnetic circuit system 1 may be a unitary structure, and the central magnetic path portion 12 may be a plate-shaped structure, and a hollow structure is disposed in the middle of the plate-shaped structure, i.e. the central magnetic path portion 12 is a ring-shaped plate-shaped structure, which is not limited herein. Of course, in other embodiments, the central magnetic path portion 12 may also be a separate structure, for example, the central magnetic path portion 12 is composed of a plurality of portions, and the plurality of portions surround the central magnetic path portion 12 with a hollow structure in the middle.
In the present embodiment, the first avoiding opening 122 is provided in the central magnetic circuit portion 12, so that the first avoiding opening 122 is communicated with the magnetic gap 11, thereby facilitating the bobbin 23 to penetrate through the first avoiding opening 122 into the magnetic gap 11 and be connected to the voice coil 22. It is understood that the first avoiding opening 122 may be a through hole or an opening or a through groove structure passing through the central magnetic path portion 12 and communicating the accommodating space 121 and the magnetic gap 11, which is not limited herein.
It will be appreciated that the side magnetic path portions 13 may be of unitary construction, the side magnetic path portions 13 may alternatively be of annular construction disposed around the central magnetic path portion 12, with the inner ring of the side magnetic path portions 13 being spaced from the outer peripheral wall of the central magnetic path portion 12 to form the magnetic gap 11. Of course, in other embodiments, the side magnetic path portion 13 may also be a separate structure, for example, the side magnetic path portion 13 is composed of a plurality of strip-shaped structures, and the plurality of strip-shaped structures are disposed around the central magnetic path portion 12 and spaced from the outer peripheral wall of the central magnetic path portion 12, which is not limited herein.
In an embodiment, the central magnetic circuit portion 12 includes a first long side portion 123 and a first short side portion 124 sequentially arranged, the first long side portion 123 and the first short side portion 124 are separately disposed and enclose to form the accommodating space 121, and the first long side portion 123 is spaced apart from the adjacent first short side portion 124 to define the first avoiding opening 122.
In the present embodiment, as shown in fig. 2 and 4, the central magnetic path portion 12 of the magnetic path system 1 is provided as a separate body, and the central magnetic path portion 12 includes a first long side portion 123 and a first short side portion 124 which are sequentially arranged. It is understood that the first long side portion 123 and the first short side portion 124 include at least one. Optionally, the first long side parts 123 and the first short side parts 124 include a plurality of first long side parts 123 and a plurality of first short side parts 124, which are alternately arranged and enclose the accommodating space 121, that is, the plurality of first long side parts 123 and the plurality of first short side parts 124 are alternately arranged to form a hollow ring-shaped structure. And adjacent first long side portions 123 and first short side portions 124 are spaced apart to define a first avoidance opening 122.
It is understood that the first long side portion 123 and the first short side portion 124 of the central magnetic circuit portion 12 are completely broken to define a first avoiding opening 122 communicating the accommodating space 121 and the magnetic gap 11, so that one end of the bobbin 23 is connected to the diaphragm assembly 21 located in the accommodating space 121, and the other end of the bobbin 23 extends into the magnetic gap 11 through the first avoiding opening 122 and is connected to the voice coil 22.
Alternatively, the first long side portion 123 and the first short side portion 124 of the central magnetic path portion 12 enclose to form a polygonal ring structure such as a circular ring, a rectangular ring, etc., which is not limited herein. In this embodiment, the length of the first long side 123 may be the same as or different from the length of the first short side 124, and is not limited herein.
In one embodiment, the side magnetic path portion 13 includes second long side portions 131 and second short side portions 132 arranged in sequence, the second long side portions 131 and the second short side portions 132 are separately disposed, and the second long side portions 131 are spaced apart from the adjacent second short side portions 132 to define second avoidance ports 133 communicating with the first avoidance ports 122.
In the present embodiment, as shown in fig. 2 and 4, the side magnetic path portion 13 of the magnetic path system 1 is provided as a separate body, and the side magnetic path portion 13 includes a second long side portion 131 and a second short side portion 132 arranged in sequence. It is understood that the second long side portion 131 and the second short side portion 132 include at least one. Alternatively, the second long side portion 131 and the second short side portion 132 include a plurality of portions, and the plurality of second long side portions 131 and the plurality of second short side portions 132 are alternately arranged and are disposed around the central magnetic path portion 12, that is, the plurality of second long side portions 131 and the plurality of second short side portions 132 are alternately arranged to form a ring structure. And adjacent second long side portions 131 and second short side portions 132 are spaced apart to define a second escape opening 133.
It will be appreciated that the second long side portion 131 and the second short side portion 132 of the side magnetic path portion 13 are provided as complete interruptions to define a second avoiding opening 133 communicating with the magnetic gap 11. Alternatively, the second long side portion 131 and the second short side portion 132 of the side magnetic path portion 13 enclose to form a polygonal ring-shaped structure such as a circular ring, a rectangular ring, etc., which is not limited herein. In this embodiment, the length of the second long side 131 may be the same as or different from the length of the second short side 132, and is not limited herein.
In this embodiment, the side magnetic path portion 13 and the central magnetic path portion 12 of the magnetic circuit system 1 are both separately disposed, and at this time, the first long side portion 123 of the central magnetic path portion 12 corresponds to and is spaced apart from the second long side portion 131 of the side magnetic path portion 13, and the first short side portion 124 of the central magnetic path portion 12 corresponds to and is spaced apart from the second short side portion 132 of the side magnetic path portion 13, so that the second avoiding opening 133 is correspondingly communicated with the first avoiding opening 122.
In an embodiment, the side magnetic circuit portion 13 includes a first side magnet 134, a side washer 135 and a second side magnet 136 that are sequentially stacked, the first side magnet 134 and the second side magnet 136 are magnetized along a vertical direction and opposite to each other, the second side magnet 136 is fixed to the magnetic yoke 14, the sound generating device 100 further includes a housing 4, the housing 4 includes a metal cover plate 41, and the metal cover plate 41 covers a side of the first side magnet 134 away from the side washer 135.
In this embodiment, the side magnetic circuit portion 13 may be integrally disposed or separately disposed, and when the side magnetic circuit portion 13 is disposed as an integral structure, the side magnetic circuit portion 13 includes a first side magnet 134, a side washer 135 and a second side magnet 136 that are sequentially stacked; when the side magnetic circuit portion 13 is separately disposed, that is, the side magnetic circuit portion 13 includes the second long side portion 131 and the second short side portion 132 which are sequentially arranged, and at this time, the second long side portion 131 and the second short side portion 132 both include the first side magnet 134, the side washer 135 and the second side magnet 136 which are sequentially stacked, which is not limited herein.
It is understood that the first side magnet 134 and the second side magnet 136 of the side magnetic circuit portion 13 may be permanent magnets, and the side washer 135 of the side magnetic circuit portion 13 may be a magnetic conductive plate. The shape profile of the edge washer 135 is adapted to the shape profile of the first edge magnet 134 and the second edge magnet 136. With this arrangement, the magnetic field strength of the magnetic circuit system 1 can be effectively increased. It can be understood that limit magnetic circuit portion 13 is including stacking first limit magnet 134, limit china 135 and the second limit magnet 136 that sets up in proper order, can promote magnetic circuit 1's magnetic field intensity from this greatly, under the prerequisite of the same magnetic field intensity of magnetic circuit 1, above-mentioned structure setting can reduce magnetic circuit 1's volume to can increase sound generating mechanism 100's back cavity volume, and then can promote sound generating mechanism 100's vocal effect.
Optionally, the first side magnet 134 and the second side magnet 136 are both magnetized in a vertical direction and in opposite directions. With this arrangement, the magnetic fluxes generated by the first side magnet 134 and the second side magnet 136 of the second long side portion 131 pass through the side washer 135 located between the first side magnet 134 and the second side magnet 136, and the magnetic fluxes generated by the first side magnet 134 and the second side magnet 136 of the second short side portion 132 pass through the side washer 135 located between the first side magnet 134 and the second side magnet 136 and the central magnetic circuit portion 12 to form a region with a large magnetic flux density, so that the first side magnet 134 and the second side magnet 136 cover the voice coil 22 as much as possible, the BL value is increased, the voice coil 22 generates a high driving force in the region, and the vibration system 2 is driven to move.
In the present embodiment, the housing 4 is provided, so that the magnetic circuit system 1 and the vibration system 2 are fixedly mounted by the housing 4. It can be understood that shell 4 includes metal covering plate 41, utilize metal covering plate 41 lid to locate first edge magnet 134 and keep away from one side of limit china department 135, utilize metal covering plate 41 to realize that magnetic circuit 1's installation is fixed on the one hand, on the other hand, utilize metal covering plate 41 to realize sound generating mechanism 100's quick heat dissipation, improve the radiating effect, moreover, metal covering plate 41 lid fits first edge magnet 134 and keeps away from one side of limit china department 135, can play the effect that china department gathers magnetism, promote the magnetic field intensity in magnetic field.
In one embodiment, the diaphragm assembly 21 includes a diaphragm 211 and a dome 213, the dome 213 is connected to the diaphragm 211 and is located at the center of the diaphragm 211, and an edge portion of the diaphragm 211 is connected to the housing 4.
In the present embodiment, as shown in fig. 1 to 3, 5, and 6, by attaching the dome 213 to the center position of the diaphragm 211, the edge portion of the diaphragm 211 is connected to the housing 4, so that the strength of the center position of the diaphragm 211 is increased by the dome 213.
In an embodiment, as shown in fig. 1 to 3, 5 and 6, the housing 4 further includes a plastic part 42 integrally molded with the metal cover plate 41, and the plastic part 42 of the housing 4 is connected to an edge portion of the diaphragm 211. It can be understood that the edge portion of the diaphragm 211 is integrally injection-molded with the plastic part 42, thereby improving the connection strength and sealing performance of the diaphragm 211 with the plastic part 42 of the housing 4. Of course, in other embodiments, the edge portion of the diaphragm 211 and the plastic part 42 are integrally formed by hot pressing; alternatively, the edge portion of the diaphragm 211 is adhesively connected to the plastic member 42, which is not limited herein.
In one embodiment, the central magnetic circuit portion 12 includes a central washer 126 and a second central magnet 127 stacked in sequence, the second central magnet 127 is fixed to the yoke 14, and the metal cover plate 41 covers both the first side magnet 134 and the central washer 126 on the side away from the yoke 14.
As shown in fig. 2 and 3, the central magnetic circuit portion 12 may be integrally disposed or separately disposed, and when the central magnetic circuit portion 12 is disposed as an integral structure, the central magnetic circuit portion 12 includes a central washer 126 and a second central magnet 127 which are sequentially stacked; when the central magnetic circuit portion 12 is provided as a separate body, that is, the central magnetic circuit portion 12 includes a first long side portion 123 and a first short side portion 124 which are sequentially arranged, and at this time, the first long side portion 123 and the first short side portion 124 both include a central washer 126 and a second central magnet 127 which are sequentially stacked, which is not limited herein.
It is understood that the second central magnet 127 of the central magnetic circuit portion 12 may be a permanent magnet, and the central washer 126 of the central magnetic circuit portion 12 may be a magnetic conductive plate. The shape profile of the central washer 126 is adapted to the shape profile of the second central magnet 127. With this arrangement, the magnetic field strength of the magnetic circuit system 1 can be effectively increased.
In this embodiment, the first side magnet 134 and the side of the center washer 126 far away from the yoke 14 are covered by the housing 4, that is, the metal cover plate 41 and the plastic part 42 of the housing 4 are covered by the first side magnet 134 far away from the side washer 135 and the center washer 126 far away from the second center magnet 127, on the one hand, the metal cover plate 41 is used for fixing the magnetic circuit system 1, and the metal cover plate 41 can also play a role in magnet gathering of the washer, on the other hand, the metal cover plate 41 is used for achieving rapid heat dissipation of the sound generating device 100, and the heat dissipation effect is improved.
In an embodiment, the central magnetic circuit portion 12 includes a first central magnet, a central washer 126 and a second central magnet 127, which are stacked in sequence, the first central magnet and the second central magnet 127 are magnetized in opposite directions, the second central magnet 127 is fixed to the magnetic yoke 14, and the metal cover plate 41 covers both the first side magnet 134 and the first central magnet on the side away from the magnetic yoke 14.
In this embodiment, the central magnetic circuit portion 12 may be integrally disposed or separately disposed, and when the central magnetic circuit portion 12 is disposed as an integral structure, the central magnetic circuit portion 12 includes a first central magnet, a central washer 126 and a second central magnet 127 which are sequentially stacked; when the central magnetic circuit portion 12 is separately disposed, that is, the central magnetic circuit portion 12 includes a first long side portion 123 and a first short side portion 124 sequentially arranged, and at this time, the first long side portion 123 and the first short side portion 124 both include a first central magnet, a central washer 126 and a second central magnet 127 which are sequentially stacked, which is not limited herein.
It is understood that the first and second central magnets 127 of the central magnetic circuit portion 12 may be permanent magnets and the central washer 126 of the central magnetic circuit portion 12 may be a magnetic conductive plate. The shape profile of the central washer 126 is adapted to the shape profile of the first and second central magnets 127. With this arrangement, the magnetic field strength of the magnetic circuit system 1 can be effectively increased. It can be understood that, because central magnetic circuit portion 12 is including stacking the first central magnet and the second central magnet 127 that set up, can increase magnetic circuit 1's magnetic field intensity from this, under the prerequisite of the same magnetic field intensity of magnetic circuit 1, above-mentioned structural arrangement can reduce magnetic circuit 1's volume to can increase sound generating mechanism 100's back cavity volume, and then can promote sound generating mechanism 100's vocal effect.
Optionally, the first and second central magnets 127 are both magnetized in a vertical direction and in opposite directions. With this arrangement, the magnetic fluxes generated by the first center magnet and the second center magnet 127 of the center magnetic circuit portion 12 and the magnetic fluxes generated by the first side magnet 134 and the second side magnet 136 of the side magnetic circuit portion 13 form a region with a relatively large magnetic flux density through the center washer 126 located between the first center magnet and the second center magnet 127 and the side washers 135 located between the first side magnet 134 and the second side magnet 136, so that the first side magnet 134 and the second side magnet 136 and the first center magnet and the second center magnet 127 are covered along the voice coil 22 as much as possible, the BL value is increased, and the voice coil 22 generates a high driving force in the region to drive the vibration system 2 to move.
It can be understood, through utilizing the shell 4 to cover simultaneously and locate the one side of keeping away from yoke 14 of first edge magnet 134 and first central magnet, also utilize metal covering 41 and the plastic part 42 of shell 4 to cover simultaneously and locate one side that first edge magnet 134 kept away from limit china 135 and one side that center china 126 was kept away from to first edge magnet 134, utilize metal covering 41 to realize that magnetic circuit 1's installation is fixed on the one hand, on the other hand, utilize metal covering 41 to realize sound generating mechanism 100's quick heat dissipation, and the heat dissipation effect is improved, moreover, metal covering 41 covers simultaneously in one side that first edge magnet 134 and first central magnet kept away from the yoke, can play the effect that china department gathers magnetism, promote the magnetic field intensity in magnetic field.
In an embodiment, the side magnetic circuit portion 13 includes a first side washer, a first side magnet 134, a second side washer and a second side magnet 136, which are sequentially stacked, wherein the first side magnet 134 and the second side magnet 136 are magnetized in a vertical direction and opposite to each other, and the second side magnet 136 is fixed to the magnetic yoke 14.
It will be appreciated that the metal cover plate 41 covers the side of the first rim washer remote from the first rim magnet 134. In this embodiment, the first edge washer and the second edge washer of the edge magnetic circuit portion 13 may be magnetic conductive plates, the first edge magnet 134 and the second edge magnet 136 may be permanent magnets, the first edge magnet 134 and the second edge magnet 136 generate magnetic fluxes, and the first edge washer and the second edge washer homogenize the magnetic fluxes generated by the first edge magnet 134 and the second edge magnet 136, so as to further improve the magnetic field strength of the magnetic circuit system 1.
In an embodiment, the central magnetic circuit portion 12 includes a first central washer, a first central magnet, a second central washer, and a second central magnet 127, which are sequentially stacked, wherein the first central magnet and the second central magnet 127 are magnetized in opposite directions, the second central magnet 127 is fixed to the magnetic yoke 14, and the outer periphery of the diaphragm assembly 21 is fixed to the first central washer.
It will be appreciated that the plastic part 42 of the housing 4 covers the side of the first central washer remote from the first central magnet. In this embodiment, the first central washer and the second central washer of the central magnetic circuit portion 12 may be selected as magnetic conductive plates, the first central magnet and the second central magnet 127 may be selected as permanent magnets, magnetic fluxes are generated by the first central magnet and the second central magnet 127, the magnetic fluxes generated by the first central magnet and the second central magnet 127 are uniformized by the first central washer and the second central washer, and the magnetic field strength of the magnetic circuit system 1 is further improved.
In the present embodiment, as shown in fig. 2 to 4, in order to avoid the center washer 126 of the central magnetic circuit portion 12 from affecting the vibration of the diaphragm 211, one end of the center washer 126 near the diaphragm 211 is provided with a chamfer. It is understood that the diaphragm assembly 21 includes a diaphragm 211 and a dome 213, the dome 213 is connected to the diaphragm 211 and is located at the center of the diaphragm 211, one end of the bobbin 23 is connected to the dome 213, and the other end of the bobbin 23 extends into the magnetic gap 11 through the first avoiding opening 122 and is connected to the voice coil 22.
It can be understood that, as shown in fig. 4, by providing chamfers at the ends of the first long side portion 123 and the first short side portion 124 of the central magnetic path portion 12 adjacent to the first avoidance opening 122, the extended portion 232 of the framework 23 can be avoided by the chamfers, so that the area of the central magnetic path portion 12 can be increased, and the interference influence of the central magnetic path portion 12 on the extended portion 232 of the framework 23 can be avoided.
It is understood that the diaphragm 211 has an upwardly convex or downwardly concave corrugated portion, the dome 213 is connected to the inner side of the corrugated portion of the diaphragm 211, and the outer side of the corrugated portion of the diaphragm 211 is connected to the plastic part 42 of the housing 4, which is not limited herein. In this embodiment, the bending portion of the vibrating diaphragm 211 can be selected as the bending portion of the downward depression, and the bending portion is a U-shaped structure with elastic recovery, so as to be disposed, so that the vibrating diaphragm 211 occupies a small vibration radiation surface on the basis of providing a large compliance, and the vibration sound-emitting area is effectively increased.
In this embodiment, the diaphragm 211 and the dome 213 of the diaphragm assembly 21 may be integrally formed by an integral molding technique. It can be understood that the planar portion of the diaphragm 211 is tightly pressed to the dome 213, and the outer edge of the diaphragm 211 is coupled to the plastic part 42 of the housing 4, the integrally formed diaphragm assembly 21 is connected through the housing 4, and the three integrally formed techniques ensure reliable and durable contact.
In an embodiment of the present invention, the magnetic conductive yoke 14 includes a main body portion and a bent portion (not shown), the side magnetic path portion 13 is disposed on the main body portion, the bent portion is disposed on a side of the main body portion close to the accommodating space 121 and extends in a direction close to the diaphragm assembly 21 with respect to the main body portion, and the bent portion is spaced apart from the side magnetic path portion 13 to define the magnetic gap 11. The housing 4 includes a metal cover plate 41 and a plastic part 42 integrally injection-molded with the metal cover plate 41, the metal cover plate 41 covers the magnetic circuit portion 13, and the plastic part 42 is located above the bending portion and connected to the edge portion of the diaphragm 211. Thus, the above arrangement can simplify the structural design of the magnetic circuit system 1.
In one embodiment, as shown in fig. 2 to 7, the diaphragm assembly 21 includes a diaphragm 211 and a dome 213, the dome 213 is connected to the diaphragm 211 and located at the center of the diaphragm 211, one end of the bobbin 23 is connected to the dome 213, and the other end of the bobbin 23 extends into the magnetic gap 11 and is connected to the voice coil 22.
It can be understood that the strength of the center of the diaphragm 211 is increased by the dome 213 by attaching the dome 213 to the center of the diaphragm 211. The supporting portion 231 of the bobbin 23 is connected to the dome 213, and the extending portion 232 of the bobbin 23 passes through the first avoiding opening 122 and extends into the magnetic gap 11 to connect to the voice coil 22, so that the annular supporting portion 231 can be used to improve the stability of connection to the dome 213, and the annular supporting portion 231 is favorable to improving the torsional rigidity of the bobbin 23 and reducing the high-frequency resonance, and the extending portion 232 of the bobbin 23 can transmit the vibration of the voice coil 22 to the diaphragm 211.
In one embodiment, the distance between the top surface of the dome 213 and the bottom wall of the accommodating space 121 is smaller than the distance between the top surface of the magnetic circuit system 1 and the bottom wall of the accommodating space 121 in the vertical direction. It is understood that, as shown in fig. 3, the thickness of the magnetic circuit system 1 is set to be parallel to the vibration height of the diaphragm assembly 21, so that the thickness of the sound generating apparatus 100 can be reduced.
In one embodiment, the dome 213 and the armature 23 are formed as an integrally formed piece of metal. It can be understood that, by such an arrangement, the connection strength between the dome 213 and the bobbin 23 can be improved, and the vibration effect of the voice coil 22 transmitting the vibration to the diaphragm 211 through the bobbin 23 can be improved.
The invention also provides an electronic device, which comprises the sound generating device 100. The specific structure of the sound generating device 100 refers to the foregoing embodiments, and since the electronic device adopts all the technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and no further description is given here.
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 (20)
1. A sound generating device, the sound generating device comprising:
the magnetic circuit system is provided with a magnetic gap and is arranged in a hollow manner to limit an accommodating space;
the vibration system comprises a vibration diaphragm assembly, a voice coil and a framework, the vibration diaphragm assembly is located in the containing space, the voice coil is inserted into the magnetic gap, a first end of the framework is connected with the vibration diaphragm assembly, a second end of the framework extends into the magnetic gap and is connected with the voice coil, and the voice coil drives the vibration diaphragm assembly to vibrate through the framework; and
the inner of the centering support sheet is connected with the second end of the framework, the centering support sheet is provided with an inner bonding pad and an outer bonding pad, the lead part of the voice coil is welded with the inner bonding pad, and the outer bonding pad is electrically connected with an external circuit.
2. The sound generating apparatus as claimed in claim 1, wherein the outer end of the centering branch piece is fixed to the magnetic circuit system;
or, the sound generating device further comprises a shell, the magnetic circuit system and the vibration system are arranged in the shell, and the outer end of the centering support piece is fixed on the shell.
3. The sound generating apparatus as claimed in claim 2, wherein the magnetic circuit system is disposed in a square shape;
the number of the centering branch pieces is two, avoidance ports are formed in at least one pair of diagonal positions of the magnetic circuit system, one centering branch piece is arranged in each avoidance port, and two ends of each centering branch piece are respectively connected with the framework and the shell; or, the number of the centering branch pieces is four, avoidance ports are arranged at four diagonal positions of the magnetic circuit system, one centering branch piece is arranged in each avoidance port, and two ends of each centering branch piece are respectively connected with the framework and the shell.
4. The sounding device according to claim 1, wherein the frame comprises a supporting portion and an extending portion, the supporting portion is disposed in an annular shape, one end of the supporting portion is connected to the diaphragm assembly, the extending portion is disposed at the other end of the supporting portion, the extending portion extends into the magnetic gap and is connected to the voice coil, and an inner end of the centering piece is connected to the extending portion.
5. The sound generating apparatus as claimed in claim 4, wherein the magnetic circuit system is disposed in a square shape;
the two extending parts are distributed at intervals along the circumferential direction of the supporting part, extend into the magnetic gap respectively through a pair of diagonal positions of the magnetic circuit system and are connected with the voice coil; or, the number of the extension parts is four, the four extension parts are distributed at intervals along the circumferential direction of the support part, and the four extension parts respectively extend into the magnetic gap through four diagonal positions of the magnetic circuit system and are connected with the voice coil.
6. The apparatus according to claim 4, wherein the number of said centering fins is the same as the number of said extending portions, and a plurality of said centering fins are provided in one-to-one correspondence with a plurality of said extending portions.
7. The sound generating apparatus according to claim 4, wherein an end of the extension portion connected to the voice coil includes a first fixing portion and a second fixing portion, the first fixing portion is formed in a circular arc shape and connected to the voice coil, the second fixing portion is formed in a long strip shape, and the inner pad of the spider is fixed to the second fixing portion.
8. The sound emitting device of claim 4, wherein the support portion is formed as an integral molding with the extension portion;
or, the support part and the extension part are welded or bonded.
9. The sound generating apparatus as claimed in claim 1, wherein the magnetic circuit system comprises:
a central magnetic circuit portion which is arranged in a hollow manner to define the accommodating space;
a side magnetic path portion provided on an outer periphery of the central magnetic path portion and spaced apart from the central magnetic path portion to define the magnetic gap; and
a yoke to which the center magnetic path portion and the side magnetic path portions are fixed, respectively;
the central magnetic circuit part is provided with a first avoidance port, and the framework penetrates through the first avoidance port and is connected with the voice coil.
10. The sound generating apparatus as claimed in claim 9, wherein the central magnetic circuit portion includes a first long side portion and a first short side portion arranged in sequence, the first long side portion and the first short side portion are separately disposed and enclose to form the receiving space, and the first long side portion is disposed at an interval from the adjacent first short side portion to define the first avoidance opening.
11. The sound generating apparatus as claimed in claim 9, wherein the side magnetic path portion includes a second long side portion and a second short side portion arranged in series, the second long side portion and the second short side portion are separately provided, and the second long side portion is provided at an interval from the adjacent second short side portion to define a second avoidance port communicating with the first avoidance port.
12. The sounding device according to claim 9, wherein the side magnetic circuit portion includes a first side magnet, a side washer, and a second side magnet, which are stacked in sequence, the first side magnet and the second side magnet are magnetized in a vertical direction and in opposite directions, the second side magnet is fixed to the magnetic yoke, the sounding device further includes a housing, the housing includes a metal cover plate, and the metal cover plate is covered on a side of the first side magnet away from the side washer.
13. The sound production device of claim 12, wherein the diaphragm assembly includes a diaphragm and a dome, the dome is connected to the diaphragm and located at a center of the diaphragm, and an edge portion of the diaphragm is connected to the housing.
14. The sound generating apparatus of claim 13, wherein the housing further comprises a plastic member integrally injection molded with the metal cover plate;
the edge part of the vibrating diaphragm and the plastic part are integrally injection molded; or the edge part of the vibrating diaphragm and the plastic part are integrally hot-pressed and molded; or the edge part of the vibrating diaphragm is connected with the plastic part in an adhesive mode.
15. The sounding device according to claim 13, wherein the central magnetic circuit portion includes a first central magnet, a central washer and a second central magnet stacked in sequence, the first central magnet and the second central magnet are magnetized in opposite directions, the second central magnet is fixed to the yoke, and the metal cover plate covers both the first side magnet and the first central magnet on a side away from the yoke.
16. The sounding device according to claim 9, wherein the side magnetic circuit portion comprises a first side washer, a first side magnet, a second side washer and a second side magnet, which are sequentially stacked, wherein the first side magnet and the second side magnet are magnetized in a vertical direction and opposite to each other, and the second side magnet is fixed to the magnetic yoke;
and/or the central magnetic circuit part comprises a first central washer, a first central magnet, a second central washer and a second central magnet which are sequentially stacked, the first central magnet and the second central magnet are magnetized in the vertical direction and in opposite directions, the second central magnet is fixed on the magnetic guide yoke, and the periphery of the diaphragm component is fixed on the first central washer.
17. The sound generating device according to claim 1, wherein said diaphragm assembly comprises a diaphragm and a dome, said dome is connected to said diaphragm and located at the center of said diaphragm, one end of said bobbin is connected to said dome, and the other end of said bobbin extends into said magnetic gap and is connected to said voice coil.
18. The sound generating apparatus as claimed in claim 17, wherein a distance between a top surface of the dome and the bottom wall of the accommodating space in the vertical direction is smaller than a distance between a top surface of the magnetic circuit system and the bottom wall of the accommodating space.
19. The sound emitting device of claim 17, wherein the dome and the skeleton are formed as an integrally formed piece of metal.
20. An electronic device characterized by comprising the sound emitting apparatus according to any one of claims 1 to 19.
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| CN114363778B (en) | 2023-12-22 |
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