CN113473333A - Electroacoustic device and electronic apparatus - Google Patents
Electroacoustic device and electronic apparatus Download PDFInfo
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- CN113473333A CN113473333A CN202110730655.4A CN202110730655A CN113473333A CN 113473333 A CN113473333 A CN 113473333A CN 202110730655 A CN202110730655 A CN 202110730655A CN 113473333 A CN113473333 A CN 113473333A
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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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
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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
- H04R9/04—Construction, mounting, or centering of coil
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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
- H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
- H04R2209/041—Voice coil arrangements comprising more than one voice coil unit on the same bobbin
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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
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The application provides an electroacoustic device and an electronic device. The electroacoustic device comprises a vibration component and a magnetic component. The vibration component comprises a first coil, a second coil and a diaphragm. The first coil is electrically connected with the second coil, the winding direction of the first coil is opposite to that of the second coil, and the first coil is connected with the vibrating diaphragm. The magnetic assembly is provided with a first magnetic structure, the first coil is positioned in a magnetic circuit formed by the first magnetic structure, and the second coil is positioned outside the magnetic circuit formed by the first magnetic structure. The application provides an electroacoustic device and electronic equipment have better interference killing feature.
Description
Technical Field
The application relates to the technical field of electronics, in particular to an electroacoustic device and electronic equipment.
Background
The complexity of the integrated circuit inside the electronic device is high, which results in a complicated internal electromagnetic field, so that the electroacoustic device disposed inside the electronic device is easily interfered by the electromagnetic field to generate noise, which affects the sound transmission effect.
Disclosure of Invention
The application provides an electroacoustic device and electronic equipment that can promote interference killing feature.
In one aspect, the present application provides an electro-acoustic apparatus comprising:
the vibration component comprises a first coil, a second coil and a vibrating diaphragm, the first coil is electrically connected with the second coil, the winding direction of the first coil is opposite to that of the second coil, and the first coil is connected with the vibrating diaphragm; and
the magnetic assembly is provided with a first magnetic structure, the first coil is positioned in a magnetic circuit formed by the first magnetic structure, and the second coil is positioned outside the magnetic circuit formed by the first magnetic structure.
On the other hand, this application still provides an electronic equipment, including the shell and electroacoustic device, electroacoustic device locates in the shell.
The application provides an electroacoustic device is through setting up vibration subassembly and magnetic component for vibration subassembly's first coil links to each other with the vibrating diaphragm and realizes electroacoustic conversion under the effect of the magnetic circuit that magnetic component's first magnetic structure formed. Because the first coil is electrically connected with the second coil, and the winding direction of the first coil is opposite to that of the second coil, in the process of realizing electroacoustic conversion, if an interference magnetic field is arranged outside the electroacoustic device, the induced current generated by the first coil cutting the magnetic induction line in the interference magnetic field and the induced current generated by the second coil cutting the magnetic induction line in the interference magnetic field can be at least partially offset, so that the anti-interference capability of the electroacoustic device can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
fig. 2 is an exploded schematic view of the electronic device of fig. 1 including a housing, a display screen, and an electro-acoustic apparatus;
fig. 3 is a schematic cross-sectional view of an electro-acoustic device of the electronic apparatus of fig. 2 including a vibrating assembly and a magnetic assembly;
fig. 4 is a schematic structural view of a vibration assembly of the electroacoustic device shown in fig. 3, the vibration assembly including a first coil, a second coil and a diaphragm, and a magnetic assembly including a first magnetic structure;
fig. 5 is a schematic cross-sectional view of the electro-acoustic apparatus shown in fig. 3 further including a second magnetic structure, and a second coil connected to the diaphragm;
fig. 6 is a schematic structural view of a magnetic assembly of the electroacoustic device shown in fig. 5, including a first magnetic member, a second magnetic member and a third magnetic member;
fig. 7 is a schematic cross-sectional view of the electro-acoustic device shown in fig. 6, wherein the first magnetic element and the second magnetic element form a first magnetic structure, and the second magnetic element and the third magnetic element form a second magnetic structure;
fig. 8 is a schematic view of a magnetic pole of the first magnetic member, the second magnetic member and the third magnetic member of the electro-acoustic device shown in fig. 7;
fig. 9 is a schematic cross-sectional view of the magnetic assembly of the electro-acoustic device shown in fig. 8 further including a first magnetically permeable member and a second magnetically permeable member;
fig. 10 is an exploded schematic view of the vibratory assembly of the electro-acoustic apparatus shown in fig. 8 further including a centering chip;
fig. 11 is a schematic structural view of the first coil, the second coil and the damper in the electroacoustic device shown in fig. 10.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The embodiments listed in the present application may be appropriately combined with each other.
As shown in fig. 1, fig. 1 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 may be a mobile phone, a tablet computer, a notebook computer, an earphone, a recording device, a sound box, a media player, an automobile, a home appliance, etc. The embodiment of the application takes a mobile phone as an example. The electronic device 100 includes an electroacoustic apparatus 1 and a housing 2. The electroacoustic device 1 may be a speaker, a receiver, a buzzer, a microphone, or the like. The embodiment of the application takes a loudspeaker as an example. It is to be understood that, in the embodiments of the present application, the electroacoustic device 1 is a device that converts electric energy into sound without specific description. However, in other embodiments, the electro-acoustic device 1 of the present application may also be a device that converts sound into electrical energy.
The numbering of the components in the present application, such as "first", "second", etc., is used merely to distinguish between the objects depicted and not to imply any order or technique or other meanings.
As shown in fig. 2, the electroacoustic device 1 is provided in the housing 2. Specifically, the housing 2 includes a center frame 21 and a back plate 22. The middle frame 21 and the back plate 22 are integrally formed or connected. The electronic device 100 further comprises a display 3. The display screen 3 is connected to the side of the middle frame 21 facing away from the back plate 22. An accommodating space 24 is formed among the display screen 3, the middle frame 21 and the back plate 22. The electroacoustic device 1 is provided in the housing space 24. Wherein, one or more sound holes corresponding to the electroacoustic device 1 are arranged on the middle frame 21 and/or the back plate 22. In the embodiment of the present application, the electroacoustic device 1 faces the bottom of the middle frame 21, and one or more sound holes corresponding to the electroacoustic device 1 are provided on the bottom of the middle frame 21. Of course, in other embodiments, the electroacoustic device 1 may also face the top of the middle frame 21, the side of the middle frame 21, or the back plate 22, etc.
As shown in fig. 3, fig. 3 is a schematic structural diagram of an electroacoustic device 1 according to an embodiment of the present application. The electro-acoustic apparatus 1 comprises a vibration assembly 10 and a magnetic assembly 20.
Specifically, referring to fig. 3 and 4, the vibration assembly 10 includes a first coil 101, a second coil 102 and a diaphragm 103. The first coil 101 and the second coil 102 are annular wire windings. In the embodiment of the present application, the first coil 101 and the second coil 102 are both circular. Of course, in other embodiments, the first coil 101 and the second coil 102 may also be square, rectangular, other polygonal shapes, and the like. Optionally, the first coil 101 includes a bobbin and a conductive wire wound around the bobbin. Wherein, the skeleton is used for supporting the conducting wire. The material of the framework can comprise one or more of kraft paper, asbestos paper, polyimide, aluminum foil, copper foil and glass fiber. The conductive line may be a metal line, for example: copper wire, aluminum wire, copper-clad aluminum wire, oxygen-free copper wire, etc.; but also non-metallic wires, such as: graphite wire, carbon fiber wire, and the like. The structure of the second coil 102 may be the same as that of the first coil 101. The first coil 101 is electrically connected to the second coil 102. Optionally, the first coil 101 and the second coil 102 are electrically connected through a conductive wire or a circuit board. The winding direction of the first coil 101 is opposite to the winding direction of the second coil 102. In one embodiment, the first coil 101 is wound in a clockwise direction. The second coil 102 is wound in a counterclockwise direction. The winding direction of the first coil 101 may refer to the m direction in fig. 4. The winding direction of the second coil 102 may refer to the n direction in fig. 4. Of course, in other embodiments, the first coil 101 may be wound in a counterclockwise direction. The second coil 102 may be wound in a clockwise direction.
The diaphragm 103 includes, but is not limited to, a paper-bowl, a ball-top, a ribbon, a flat diaphragm. In one embodiment, the diaphragm 103 is a dome-type diaphragm. The diaphragm 103 includes a vibrating portion 130, a corrugated portion 131, and a dome 132. The loop portion 131 extends along the circumferential side of the vibrating portion 130. The dome 132 is provided on the vibration part 130. The folded ring part 131 is fixedly connected with the magnetic component 20. The term "connected" in the embodiments of the present application includes direct connection and indirect connection. In this embodiment, the corrugated portion 131 and the magnetic assembly 20 may be indirectly connected. For example: the folded ring part 131 is connected with the magnetic assembly 20 through the steel ring 30. The diaphragm 103 is connected to the first coil 101, and the diaphragm 103 is configured to vibrate under the driving of the first coil 101 to generate sound, or the diaphragm 103 is configured to drive the first coil 101 to vibrate. It is understood that when the electro-acoustic device 1 is a device for converting electric energy into sound, since the first coil 101 is connected to the diaphragm 103, the first coil 101 vibrates to drive the diaphragm 103 to generate sound. When the electroacoustic device 1 is a device for converting sound into electrical energy, the vibration of air causes the diaphragm to vibrate, and the diaphragm 103 is connected to the first coil 101, so that the diaphragm 103 can drive the first coil 101 to vibrate to make the first coil 101 cut the magnetic induction line to generate an electrical signal. In other words, the first coil 101 is configured to vibrate under the driving of the diaphragm 103 to generate an electrical signal. Wherein the first coil 101 is operable to vibrate in a direction of its central axis. The vibration mode of the diaphragm 103 driven by the first coil 101 includes, but is not limited to, axial vibration, radial vibration, circumferential vibration, and the like. The central axis of the first coil 101 may refer to the M-line in fig. 3.
The magnetic assembly 20 has a first magnetic structure 201. The first coil 101 is located inside the magnetic circuit formed by the first magnetic structure 201, and the second coil 102 is located outside the magnetic circuit formed by the first magnetic structure 201. Wherein the magnetic circuit formed by the first magnetic structure 201 may be a closed magnetic loop. It can be understood that when the first coil 101 is supplied with an alternating current, an alternating magnetic field is generated around the first coil 101, and the first coil 101 is subjected to the action of the magnetic circuit formed by the alternating magnetic field and the first magnetic structure 201 to vibrate along the central axis direction thereof, and drive the diaphragm 103 to vibrate. At this time, since the second coil 102 is located outside the magnetic path formed by the first magnetic structure 201, the second coil 102 is not influenced by the magnetic path formed by the first magnetic structure 201 or is influenced by a small magnetic path formed by the first magnetic structure 201. However, when the external disturbance magnetic field exists outside the electroacoustic device 1, the first coil 101 and the second coil 102 are both in the external disturbance magnetic field, and at this time, because the winding directions of the first coil 101 and the second coil 102 are opposite, the directions of the induced current generated by the first coil 101 cutting the magnetic induction line in the disturbance magnetic field and the induced current generated by the second coil 102 cutting the magnetic induction line in the disturbance magnetic field are opposite to each other, so as to cancel each other, thereby avoiding or reducing the influence of the external disturbance magnetic field on the vibration of the first coil 101, improving the anti-interference capability of the electroacoustic device 1, and improving the output sound quality of the electroacoustic device 1.
The electroacoustic device 1 provided by the present application is provided with the vibration component 10 and the magnetic component 20, so that the first coil 101 of the vibration component 10 is connected to the diaphragm 103 and performs electroacoustic conversion under the action of the magnetic circuit formed by the first magnetic structure 201 of the magnetic component 20. Since the first coil 101 is electrically connected to the second coil 102, and the winding direction of the first coil 101 is opposite to the winding direction of the second coil 102, in the process of implementing the electroacoustic conversion, if an interference magnetic field exists outside the electroacoustic device 1, an induced current generated by the first coil 101 cutting the magnetic induction line in the interference magnetic field and an induced current generated by the second coil 102 cutting the magnetic induction line in the interference magnetic field can be at least partially cancelled, so that the anti-interference capability of the electroacoustic device 1 can be improved.
Further, referring to fig. 4 and 5, the second coil 102 is connected to the diaphragm 103. In one embodiment, the first coil 101 and the second coil 102 are respectively connected to different positions of the diaphragm 103. The magnetic assembly 20 also has a second magnetic structure 202. Wherein the magnetic circuit formed by the second magnetic structure 202 may be a closed magnetic loop. The direction of the magnetic circuit formed by the second magnetic structure 202 is opposite to the direction of the magnetic circuit formed by the first magnetic structure 201. The second coil 102 is located inside the magnetic circuit formed by the second magnetic structure 202 and the first coil 101 is located outside the magnetic circuit formed by the second magnetic structure 202. It can be understood that when the first coil 101 is supplied with an alternating current, the second coil 102 is electrically connected to the first coil 101, the alternating current is provided on the second coil 102, an alternating magnetic field is generated around the second coil 102, and the second coil 102 is vibrated along the central axis direction thereof by the magnetic circuit formed by the alternating magnetic field and the second magnetic structure 202. Since the second coil 102 is connected to the diaphragm 103, the second coil 102 can drive the diaphragm 103 to vibrate when vibrating. At this time, since the first coil 101 is located outside the magnetic path formed by the second magnetic structure 202, the first coil 101 is not influenced by the magnetic path formed by the second magnetic structure 202 or is influenced by a smaller magnetic path formed by the second magnetic structure 202. Since the direction of the magnetic circuit formed by the second magnetic structure 202 is opposite to the direction of the magnetic circuit formed by the first magnetic structure 201, and the winding direction of the second coil 102 is opposite to the winding direction of the first coil 101, the first coil 101 and the second coil 102 of the electroacoustic device 1 vibrate in the same direction and drive the diaphragm 103 to vibrate to generate sound under the action of the magnetic circuit formed by the first magnetic structure 201 and the magnetic circuit formed by the second magnetic structure 202, respectively. In this embodiment, since the first coil 101 and the second coil 102 can both drive the diaphragm 103 to vibrate, the vibration amplitude of the diaphragm 103 is increased, and thus, the electroacoustic conversion rate of the electroacoustic device 1 can be increased. In addition, the impedance of the electroacoustic device 1 may be adjusted by changing the electrical connection (e.g., series connection, parallel connection) between the first coil 101 and the second coil 102, so as to increase the operating frequency band of the electroacoustic device 1 and widen the effective bandwidth of the electroacoustic device 1.
Alternatively, as shown in fig. 5, the second coil 102 is provided around and spaced apart from the outer periphery side of the first coil 101. It will be appreciated that the diameter of the second coil 102 is greater than the diameter of the first coil 101, and the second coil 102 encircles the first coil 101. In this embodiment, by disposing the second coil 102 around the outer periphery of the first coil 101, the size of the electroacoustic device 1 in the axial direction and the radial direction can be reduced compared to the case where the second coil 102 is disposed in parallel, side by side, and offset with respect to the first coil 101. Further, the second coil 102 is disposed around the outer periphery of the first coil 101, and the second coil 102 and the first coil 101 have an overlapping region, so that when the magnetic induction line of the external disturbance magnetic field penetrates the first coil 101, it is likely to penetrate the second coil 102. Therefore, for the external interference magnetic field with a small coverage area, the second coil 102 and the first coil 101 can still cut the magnetic induction lines in the external interference magnetic field to generate induced currents with opposite directions, so as to reduce the noise of the electroacoustic device 1 and improve the sound quality of the electroacoustic device 1.
In one embodiment, the second coil 102 surrounds and is spaced apart from the outer periphery of the first coil 101, and the first coil 101 and the second coil 102 are coaxially disposed. In other words, the central axis of the first coil 101 coincides with the central axis of the second coil 102. The central axis of the first coil 101 and the second coil 102 may refer to the M-line in fig. 5. In this embodiment, the first coil 101 and the second coil 102 are coaxially disposed, which is beneficial to improving the structural symmetry of the vibrating assembly 10, so that the noise of the electroacoustic device 1 is reduced, the sound quality of the electroacoustic device 1 is improved, the vibration uniformity of the diaphragm 103 is also improved, and the distortion phenomenon of the electroacoustic device 1 during sound transmission is reduced.
Optionally, referring to fig. 6 and 7, the magnetic assembly 20 includes a first magnetic member 203, a second magnetic member 204, and a third magnetic member 205. The first magnetic member 203, the second magnetic member 204, and the third magnetic member 205 may be permanent magnets or electromagnets. Of course, one of the first magnetic member 203, the second magnetic member 204 and the third magnetic member 205 may also be a magnetizer. The magnetizer is understood to be a magnetic member which has no magnetism but has magnetic permeability. In one embodiment, the first magnetic member 203, the second magnetic member 204, and the third magnetic member 205 are all permanent magnets or all electromagnets. In another embodiment, the first magnetic member 203 is a magnetizer. The second magnetic member 204 and the third magnetic member 205 are permanent magnets. Specifically, the first magnetic member 203 is T-iron. The second magnetic member 204 and the third magnetic member 205 are magnetic steels. The first magnetic member 203, the second magnetic member 204, and the third magnetic member 205 may be annular magnetic members. In this embodiment, the first magnetic member 203, the second magnetic member 204 and the third magnetic member 205 are all circular. Of course, in other embodiments, the first magnetic member 203, the second magnetic member 204, and the third magnetic member 205 may also have a square shape, a rectangular shape, other polygonal shapes, and the like. The shapes of the first magnetic member 203, the second magnetic member 204, and the third magnetic member 205 may be the same as or different from the shapes of the first coil 101 and the second coil 102. For example: the first magnetic element 203, the second magnetic element 204, the third magnetic element 205, the first coil 101 and the second coil 102 are all circular; alternatively, the first magnetic element 203, the second magnetic element 204, and the third magnetic element 205 are square, and the first coil 101 and the second coil 102 are circular, for example.
The first magnetic member 203 includes a support portion 230 and a protrusion 231 provided on the support portion 230. The supporting portion 230 and the protruding portion 231 may be integrally formed or connected. The material of the supporting portion 230 may be the same as or different from that of the protrusion 231. Optionally, the supporting portion 230 and the protruding portion 231 may both be T-iron, or the supporting portion 230 is T-iron and the protruding portion 231 is magnetic steel. In one embodiment, the supporting portion 230 is T-iron, and the protruding portion 231 is magnetic steel. The second magnetic member 204 and the third magnetic member 205 are disposed on the supporting portion 230. Specifically, the second magnetic member 204 is fixedly connected to the supporting portion 230 of the first magnetic member 203. The third magnetic member 205 is fixedly connected to the supporting portion 230 of the first magnetic member 203. In this embodiment, the second magnetic member 204 is directly contacted or hermetically connected to the supporting portion 230 of the first magnetic member 203. The third magnetic member 205 is in direct contact with or hermetically connected to the supporting portion 230 of the first magnetic member 203. The second magnetic member 204 surrounds and is spaced apart from the outer circumferential side of the protruding portion 231. The third magnetic member 205 surrounds and is spaced apart from the outer circumferential side of the second magnetic member 204. In other words, the first magnetic element 203, the second magnetic element 204 and the third magnetic element 205 are sequentially arranged along the radial direction of the electroacoustic device 1, and a gap is formed between the protrusion 231 of the first magnetic element 203 and the second magnetic element 204, and a gap is formed between the third magnetic element 205 and the second magnetic element 204. Wherein, the radial direction of the electroacoustic device 1 can refer to the X direction in fig. 7. The first magnetic structure 201 includes a second magnetic member 204, a protrusion 231, and a portion of the supporting portion 230. In other words, the second magnetic member 204, the protrusion 231 and a portion of the supporting portion 230 form the first magnetic structure 201. The second magnetic element 204, the protrusion 231 and a portion of the supporting portion 230 are surrounded to form a first magnetic gap. The first magnetic gap is used to accommodate the first coil 101. The second magnetic structure 202 includes a third magnetic element 205, a second magnetic element 204, and another supporting portion 230. In other words, the third magnetic element 205, the second magnetic element 204 and another portion of the supporting portion 230 form the second magnetic structure 202. The second magnetic element 204, the third magnetic element 205 and another part of the supporting portion 230 are surrounded to form a second magnetic gap. The second magnetic gap is used to accommodate the second coil 102. By forming the first magnetic structure 201 by the second magnetic member 204 and the protrusion 231, a magnetic field can be provided to the first coil 101. The gap between the second magnetic member 204 and the protrusion 231 can be used for accommodating the first coil 101. The third magnetic element 205 and the second magnetic element 204 form a second magnetic structure 202, which provides a magnetic field for the second coil 102. The gap between the third magnetic element 205 and the second magnetic element 204 can be used for receiving the second coil 102.
In this embodiment, since the supporting portion 230 is used for supporting the first magnetic member 203 and the second magnetic member 204, and the protruding portion 231 is used for forming the first magnetic structure 201 with the second magnetic member 204, by setting the supporting portion 230 as T-iron, and the protruding portion 231 is magnetic steel, the magnetic field strength between the protruding portion 231 and the second magnetic member 204 can be increased while the total weight of the first magnetic member 203 is reduced, that is, the sound transmission performance of the electroacoustic device 1 is enhanced while the weight of the electroacoustic device 1 is reduced. In addition, the second magnetic member 204 is directly contacted or hermetically connected with the supporting portion 230 of the first magnetic member 203, which is beneficial to forming a closed magnetic loop for the first magnetic structure 201, and reducing or avoiding magnetic leakage between the second magnetic member 204 and the supporting portion 230 of the first magnetic member 203. The third magnetic element 205 is directly contacted or hermetically connected with the supporting portion 230 of the first magnetic element 203, which is beneficial to forming a closed magnetic loop for the second magnetic structure 202, and reducing or avoiding magnetic leakage between the third magnetic element 205 and the supporting portion 230 of the first magnetic element 203.
In one embodiment, as shown in fig. 8, the first magnetic member 203 includes a first end and a second end arranged along the axial direction of the electroacoustic device 1. The second magnetic member 204 includes a third end and a fourth end arranged in the axial direction of the electro-acoustic device 1. The third magnetic member 205 includes a fifth end and a sixth end aligned in the axial direction of the electro-acoustic device 1. In this embodiment, the first end and the second end of the first magnetic member 203 may be understood as two regions where the first magnetic member 203 is arranged in the axial direction of the electroacoustic device 1, which is not intended to limit the first end and the second end as two end surfaces or end portions of the first magnetic member 203 arranged in the axial direction of the electroacoustic device 1. The third end and the fourth end of the second magnetic member 204 may be understood as two regions of the second magnetic member 204 arranged in the axial direction of the electro-acoustic device 1, which is not intended to limit the third end and the fourth end as two end surfaces or ends of the second magnetic member 204 arranged in the axial direction of the electro-acoustic device 1. The fifth end and the sixth end of the third magnetic member 205 may be understood as two regions of the third magnetic member 205 arranged in the axial direction of the electro-acoustic device 1, which is not intended to limit the fifth end and the sixth end to two end surfaces or end portions of the third magnetic member 205 arranged in the axial direction of the electro-acoustic device 1. The axial direction of the electroacoustic device 1 may refer to the Z-axis direction in the figure.
The first end and the fifth end are respectively positioned at two opposite sides of the third end. In other words, the first end of the first magnetic member 203, the third end of the second magnetic member 204, and the fifth end of the third magnetic member 205 are sequentially arranged along the radial direction of the electroacoustic device 1. The second end and the sixth end are respectively positioned at two opposite sides of the fourth end. In other words, the second end of the first magnetic member 203, the fourth end of the second magnetic member 204, and the sixth end of the third magnetic member 205 are arranged in sequence along the radial direction of the electroacoustic device 1. The first end, the fourth end and the fifth end are provided with a first magnetic pole. The second end, the third end and the sixth end are provided with a second magnetic pole. The first magnetic pole is an N pole, and the second magnetic pole is an S pole; alternatively, the first magnetic pole is an S pole and the second magnetic pole is an N pole. In one embodiment, the first end of the first magnetic element 203, the fourth end of the second magnetic element 204, and the fifth end of the third magnetic element 205 are N-poles. The second end of the first magnetic element 203, the third end of the second magnetic element 204 and the sixth end of the third magnetic element 205 are S poles. In another embodiment, the first end of the first magnetic element 203, the fourth end of the second magnetic element 204, and the fifth end of the third magnetic element 205 are S-poles. The second end of the first magnetic member 203, the third end of the second magnetic member 204, and the sixth end of the third magnetic member 205 are N-poles.
The first end, the fourth end and the fifth end are provided with the first magnetic pole, and the second end, the third end and the sixth end are provided with the second magnetic pole, so that the directions of a magnetic circuit formed by the first magnetic structure 201 and a magnetic circuit formed by the second magnetic structure 202 are opposite, and the realization of the same-direction vibration of the first coil 101 and the second coil 102 with opposite winding directions is facilitated. In addition, the protrusion 231 side of the second magnetic member 204 facing the first magnetic member 203 and the protrusion 231 form the first magnetic structure 201, and the protrusion 231 side of the second magnetic member 204 facing the third magnetic member 205 and the third magnetic member 205 form the second magnetic structure 202, so that the number of magnetic members in the electroacoustic device 1 can be reduced, and the structural compactness of the electroacoustic device 1 can be improved.
Further, as shown in fig. 9, the magnetic assembly 20 further includes a first magnetic conductive member 206 and a second magnetic conductive member 207 which are spaced apart from each other. It is understood that the first magnetic conductive member 206 and the second magnetic conductive member 207 have no magnetism, but have magnetic conductive capability. In other words, the first magnetic conductive member 206 and the second magnetic conductive member 207 can be magnetized. The first magnetic conductive member 206 and the second magnetic conductive member 207 may be washers. The first magnetic conductive member 206 is disposed on a side of the second magnetic member 204 away from the supporting portion 230. The second magnetic conductive member 207 is disposed on a side of the third magnetic member 205 facing away from the supporting portion 230. In one embodiment, the first magnetic conductive member 206 is fixed to a side of the second magnetic member 204 away from the supporting portion 230, and the first magnetic conductive member 206 and the second magnetic member 204 are directly contacted or hermetically connected to each other at the side away from the supporting portion 230. The second magnetic conductive member 207 is fixed on a side of the third magnetic member 205 departing from the supporting portion 230, and the second magnetic conductive member 207 and the side of the third magnetic member 205 departing from the supporting portion 230 are directly contacted or hermetically connected.
In the present embodiment, the first magnetic conducting member 206 is disposed on the second magnetic member 204, and the first magnetic conducting member 206 can more uniformly concentrate the magnetic path formed by the magnetic field of the second magnetic member 204 through the first magnetic structure 201 into the gap between the second magnetic member 204 and the protrusion 231, and can more uniformly concentrate the magnetic path formed by the magnetic field of the second magnetic member 204 through the second magnetic structure 202 into the gap between the second magnetic member 204 and the third magnetic member 205. The second magnetic conducting member 207 is disposed on the third magnetic member 205, and the second magnetic conducting member 207 can concentrate the magnetic field of the third magnetic member 205 through the magnetic circuit formed by the second magnetic structure 202 into the gap between the third magnetic member 205 and the second magnetic member 204 more uniformly. Thus, the gap between the second magnetic member 204 and the protruding portion 231 and the gap between the second magnetic member 204 and the third magnetic member 205 have stronger and more uniform magnetic fields, and the first coil 101 and the second coil 102 can be subjected to the stronger and more uniform magnetic fields, so as to improve the sound transmission efficiency and stability of the electroacoustic device 1 and reduce the distortion of the electroacoustic device 1.
Optionally, referring to fig. 9 and 10, the vibration assembly 10 further includes a spider 104. The spider 104 covers and connects to the first coil 101. In this embodiment, the damper 104 covers and is connected to the same side of the first coil 101 and the second coil 102, and a side of the damper 104 away from the first coil 101 and the second coil 102 is connected to the diaphragm 103. In other words, the damper 104 is disposed between the diaphragm 103 and the first coil 101, and the damper 104 is disposed between the diaphragm 103 and the second coil 102. The first coil 101 and the second coil 102 are electrically connected by a spider 104. By providing a spider 104 between the diaphragm 103 and the first coil 101, stability of the vibration assembly 10 during vibration is maintained. In addition, the centering branch 104 is disposed between the first coil 101, the second coil 102 and the diaphragm 103, and the first coil 101 and the second coil 102 can be connected to the diaphragm 103 through the same centering branch 104, so that the number of the centering branches 104 in the electroacoustic device 1 can be reduced, and the structure of the electroacoustic device 1 can be simplified.
In one embodiment, referring to fig. 9-11, the stiffener 104 is a flexible stiffener. The centering branch 104 includes a first electrical connection portion 140, a second electrical connection portion 141, a fixing portion 142, at least one first suspension arm 143, and at least one second suspension arm 144. The first electrical connection portion 140, the second electrical connection portion 141 and the first suspension 143 are made of conductive materials. Optionally, the first electrical connection portion 140, the second electrical connection portion 141, and the first suspension 143 are made of metal, alloy, or the like, for example: copper, aluminum, copper alloys. The first electrical connection portion 140, the second electrical connection portion 141 and the first cantilever 143 are all disposed on the insulating substrate. The first electrical connection portion 140, the second electrical connection portion 141 and the fixing portion 142 are all ring-shaped. The second electrical connection portion 141 is disposed around and spaced apart from the outer circumferential side of the first electrical connection portion 140. It can be understood that the diameter of the second electrical connection portion 141 is larger than that of the first electrical connection portion 140, the second electrical connection portion 141 surrounds the first electrical connection portion 140 for a circle, and a gap is formed between the second electrical connection portion 141 and the first electrical connection portion 140. The fixing portions 142 are disposed around and spaced apart from the outer peripheral side of the second electrical connection portion 141. It can be understood that the fixing portion 142 surrounds the second electrical connection portion 141, and a gap is formed between the fixing portion 142 and the second electrical connection portion 141. In other words, the first electrical connection portion 140, the second electrical connection portion 141 and the fixing portion 142 are sequentially arranged along the radial direction of the electroacoustic device 1. The first electrical connection portion 140 covers and is connected to the first coil 101. The first electrical connection portion 140 is electrically connected to the first coil 101. The second electrical connection portion 141 covers and is connected to the second coil 102. The second electrical connection portion 141 is electrically connected to the second coil 102. The fixing portion 142 is fixedly connected to the magnetic assembly 20.
At least one first cantilever 143 is connected between the first electrical connection 140 and the second electrical connection 141. The first electrical connection portion 140 and the second electrical connection portion 141 are electrically connected through the first suspension arm 143. The number of the first suspension arms 143 is not limited in the present application, and the centering branch 104 may include one or more first suspension arms 143. When the first coil 101 and the second coil 102 vibrate in the same direction, the first electrical connection portion 140, the second electrical connection portion 141 and the first suspension 143 are driven to vibrate. In this embodiment, the first electrical connection portion 140 and the second electrical connection portion 141 are connected by at least one first suspension arm 143, and the first suspension arm 143 is supported between the first electrical connection portion 140 and the second electrical connection portion 141, so that the first coil 101 and the second coil 102 can be reduced from swinging and colliding along the radial direction of the electroacoustic device 1, and the stability of the vibration assembly 10 during the vibration process can be maintained. In addition, the first electric connection part 140 vibrates with the first coil 101, the second electric connection part 141 vibrates with the second coil 102, and the first electric connection part 140 and the second electric connection part 141 are connected through at least one first cantilever 143, so that the first cantilever 143 can buffer and absorb the vibration, and the first coil 101 and the second coil 102 can be kept in co-frequency resonance.
In one embodiment, the number of first cantilevers 143 is multiple. The plurality of first suspension arms 143 are symmetrically disposed along the geometric center of the first electrical connection portion 140. In the present embodiment, the number of first cantilevers 143 is four. The four first suspension arms 143 are symmetrically disposed along the geometric center of the first electrical connection portion 140. In other words, two adjacent first suspension arms 143 are 90 ° apart from each other. By arranging the plurality of first cantilevers 143 symmetrically arranged along the geometric center of the first electrical connection portion 140, the circumferential stress of the first coil 101 and the circumferential stress of the second coil 102 are balanced, so that the swing of the first coil 101 and the second coil 102 in the vibration process is reduced, and the sound transmission performance of the electroacoustic device 1 is improved.
At least one second suspension arm 144 is connected between the fixing portion 142 and the second electrical connection portion 141. In one embodiment, the number of the second cantilevers 144 is plural. The plurality of second cantilevers 144 are symmetrically disposed along the geometric center of the second electrical connection portion 141. In the present embodiment, the number of the second cantilevers 144 is four. The four second suspension arms 144 are symmetrically disposed along the geometric center of the second electrical connection portion 141. Each of the second suspension arms 144 extends in the circumferential direction of the second electrical connection portion 141. By providing a plurality of second cantilevers 144 symmetrically disposed along the geometric center of the second electrical connection portion 141, the plurality of the damper pads 104 are uniformly stressed, which can prolong the service life of the damper pads 104. In addition, each second cantilever 144 extends along the circumferential direction of the second electrical connection portion 141, so that the length of the second cantilever 144 can be increased, which is beneficial to enhancing the strength of the spider 104.
The foregoing is a partial description of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.
Claims (11)
1. An electro-acoustic apparatus, comprising:
the vibration component comprises a first coil, a second coil and a vibrating diaphragm, the first coil is electrically connected with the second coil, the winding direction of the first coil is opposite to that of the second coil, and the first coil is connected with the vibrating diaphragm; and
the magnetic assembly comprises a first magnetic structure, the first coil is positioned in a magnetic circuit formed by the first magnetic structure, and the second coil is positioned outside the magnetic circuit formed by the first magnetic structure.
2. The electro acoustic device in accordance with claim 1, characterized in that said second coil is connected to said diaphragm; the magnetic assembly further comprises a second magnetic structure, the direction of a magnetic circuit formed by the second magnetic structure is opposite to the direction of a magnetic circuit formed by the first magnetic structure, the second coil is positioned in the magnetic circuit formed by the second magnetic structure, and the first coil is positioned outside the magnetic circuit formed by the second magnetic structure.
3. The electro acoustic device in accordance with claim 2, characterized in that said second coil is provided around and spaced apart from an outer circumferential side of said first coil.
4. The electro acoustic apparatus according to claim 3, wherein said magnetic assembly includes a first magnetic member, a second magnetic member, and a third magnetic member, said first magnetic member includes a support portion and a protruding portion provided on said support portion, said second magnetic member and said third magnetic member are provided on said support portion, said second magnetic member is provided around and spaced apart from an outer peripheral side of said protruding portion, said third magnetic member is provided around and spaced apart from an outer peripheral side of said second magnetic member, said first magnetic structure includes said second magnetic member, said protruding portion, and a portion of said support portion, said second magnetic member, said protruding portion, and a portion of said support portion are provided around to form a first magnetic gap for receiving said first coil, said second magnetic structure includes said third magnetic member, said second magnetic member, and another portion of said support portion, the third magnetic part, the second magnetic part and the other part of the support part are arranged in a surrounding mode to form a second magnetic gap, and the second magnetic gap is used for containing the second coil.
5. The electro-acoustic device in accordance with claim 4, wherein said first magnetic member includes a first end and a second end arranged along an axial direction of said electro-acoustic device, said second magnetic member includes a third end and a fourth end arranged along the axial direction of said electro-acoustic device, said third magnetic member includes a fifth end and a sixth end arranged along the axial direction of said electro-acoustic device, said first end and said fifth end are respectively located at opposite sides of said third end, said second end and said sixth end are respectively located at opposite sides of said fourth end, said first end, said fourth end and said fifth end have a first magnetic pole, said second end, said third end and said sixth end have a second magnetic pole; the first magnetic pole is an N pole, and the second magnetic pole is an S pole; alternatively, the first magnetic pole is an S pole, and the second magnetic pole is an N pole.
6. The electro acoustic device in accordance with claim 4, wherein said magnetic assembly further comprises a first magnetic conductive member and a second magnetic conductive member disposed at an interval, said first magnetic conductive member being disposed on a side of said second magnetic member facing away from said supporting portion, said second magnetic conductive member being disposed on a side of said third magnetic member facing away from said supporting portion.
7. The electro acoustic device in accordance with any one of claims 1 to 6, characterised in that said first coil is arranged coaxially with said second coil.
8. The electro acoustic device in accordance with any one of claims 1 to 6, wherein said vibration assembly further comprises a damper, said damper covering and connecting said first coil, a side of said damper facing away from said first coil being connected to said diaphragm, said first coil and said second coil being electrically connected through said damper.
9. The electro acoustic device in accordance with claim 8, characterised in that said centring disk is a flexible centring disk, the centering support sheet comprises a first electric connection part, a second electric connection part, a fixing part, at least one first cantilever and at least one second cantilever, the first electric connection part is annular and covers and is connected with the first coil, the second electric connection part is annular and covers and is connected with the second coil, the fixing parts are arranged around the outer periphery of the second electric connecting part and the first electric connecting part at intervals, the fixing part is fixedly connected with the magnetic component, at least one first cantilever is connected between the first electric connection part and the second electric connection part, and at least one second cantilever is connected between the fixing part and the second electric connection part.
10. The electro-acoustic apparatus according to claim 9, wherein the second electrical connection portion is disposed around and spaced apart from an outer peripheral side of the first electrical connection portion, the number of the first cantilevers is plural, and the plural first cantilevers are symmetrically disposed along a geometric center of the first electrical connection portion; the number of the second cantilevers is multiple, and the second cantilevers are symmetrically arranged along the geometric center of the second electric connection part.
11. An electronic device comprising a housing and an electro-acoustic apparatus as claimed in any one of claims 1 to 10, said electro-acoustic apparatus being disposed within said housing.
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| CN202110730655.4A CN113473333B (en) | 2021-06-28 | 2021-06-28 | Electroacoustic device and electronic apparatus |
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| CN202110730655.4A CN113473333B (en) | 2021-06-28 | 2021-06-28 | Electroacoustic device and electronic apparatus |
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| CN113473333A true CN113473333A (en) | 2021-10-01 |
| CN113473333B CN113473333B (en) | 2023-04-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115226010A (en) * | 2022-09-07 | 2022-10-21 | 荣耀终端有限公司 | Anti-magnetic interference structure and electronic equipment |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9407916D0 (en) * | 1993-04-21 | 1994-06-15 | Samsung Electro Mech | Speaker |
| JPH10304493A (en) * | 1997-04-25 | 1998-11-13 | Sony Corp | Electroacoustic transducer and acoustoelectric transducer |
| US20060002578A1 (en) * | 2004-07-02 | 2006-01-05 | Samsung Electro-Mechanics Co., Ltd. | Multi-function actuator capable of preventing vibration |
| CN1832635A (en) * | 2005-03-11 | 2006-09-13 | 三星电子株式会社 | Speaker apparatus |
| WO2007054592A1 (en) * | 2005-11-08 | 2007-05-18 | Zertan, S.A. | Disturbance elimination system for inductive sensors |
| CN104424938A (en) * | 2013-08-26 | 2015-03-18 | 张学民 | Double-row single-coil double-pickup unit |
| CN204408438U (en) * | 2015-01-20 | 2015-06-17 | 深圳市鑫友鑫电子有限公司 | Mobile phone demagnetization loudspeaker |
| CN204425652U (en) * | 2015-01-23 | 2015-06-24 | 瑞声光电科技(常州)有限公司 | Electro-acoustic element |
| CN109769183A (en) * | 2019-03-08 | 2019-05-17 | 歌尔股份有限公司 | Loudspeaker |
| CN110418260A (en) * | 2018-04-27 | 2019-11-05 | 歌尔股份有限公司 | A kind of sounding monomer, sounding module and electric terminal |
| CN210986410U (en) * | 2019-12-19 | 2020-07-10 | 瑞声科技(新加坡)有限公司 | Sounding device |
| WO2020181889A1 (en) * | 2019-03-14 | 2020-09-17 | 歌尔股份有限公司 | Double-sided sound production apparatus and electronic device |
-
2021
- 2021-06-28 CN CN202110730655.4A patent/CN113473333B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9407916D0 (en) * | 1993-04-21 | 1994-06-15 | Samsung Electro Mech | Speaker |
| JPH10304493A (en) * | 1997-04-25 | 1998-11-13 | Sony Corp | Electroacoustic transducer and acoustoelectric transducer |
| US20060002578A1 (en) * | 2004-07-02 | 2006-01-05 | Samsung Electro-Mechanics Co., Ltd. | Multi-function actuator capable of preventing vibration |
| CN1832635A (en) * | 2005-03-11 | 2006-09-13 | 三星电子株式会社 | Speaker apparatus |
| WO2007054592A1 (en) * | 2005-11-08 | 2007-05-18 | Zertan, S.A. | Disturbance elimination system for inductive sensors |
| CN104424938A (en) * | 2013-08-26 | 2015-03-18 | 张学民 | Double-row single-coil double-pickup unit |
| CN204408438U (en) * | 2015-01-20 | 2015-06-17 | 深圳市鑫友鑫电子有限公司 | Mobile phone demagnetization loudspeaker |
| CN204425652U (en) * | 2015-01-23 | 2015-06-24 | 瑞声光电科技(常州)有限公司 | Electro-acoustic element |
| CN110418260A (en) * | 2018-04-27 | 2019-11-05 | 歌尔股份有限公司 | A kind of sounding monomer, sounding module and electric terminal |
| CN109769183A (en) * | 2019-03-08 | 2019-05-17 | 歌尔股份有限公司 | Loudspeaker |
| WO2020181889A1 (en) * | 2019-03-14 | 2020-09-17 | 歌尔股份有限公司 | Double-sided sound production apparatus and electronic device |
| CN210986410U (en) * | 2019-12-19 | 2020-07-10 | 瑞声科技(新加坡)有限公司 | Sounding device |
Non-Patent Citations (1)
| Title |
|---|
| 陶涛: "双面对称布线印制电路板型Rogowski线圈", 《高电压技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115226010A (en) * | 2022-09-07 | 2022-10-21 | 荣耀终端有限公司 | Anti-magnetic interference structure and electronic equipment |
| CN115226010B (en) * | 2022-09-07 | 2023-02-17 | 荣耀终端有限公司 | Anti-magnetic interference structure and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113473333B (en) | 2023-04-11 |
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