WO2022121836A1 - Haut-parleur et dispositif électronique - Google Patents

Haut-parleur et dispositif électronique Download PDF

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Publication number
WO2022121836A1
WO2022121836A1 PCT/CN2021/135687 CN2021135687W WO2022121836A1 WO 2022121836 A1 WO2022121836 A1 WO 2022121836A1 CN 2021135687 W CN2021135687 W CN 2021135687W WO 2022121836 A1 WO2022121836 A1 WO 2022121836A1
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WO
WIPO (PCT)
Prior art keywords
magnetic circuit
edge
connecting edge
loudspeaker
vibration system
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PCT/CN2021/135687
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English (en)
Chinese (zh)
Inventor
刘书明
曹明君
Original Assignee
歌尔股份有限公司
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Publication of WO2022121836A1 publication Critical patent/WO2022121836A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present invention relates to the technical field of sound and electricity, in particular to a loudspeaker and an electronic device applying the loudspeaker.
  • Speaker is a transducer device that converts electrical signals into acoustic signals. It is widely used in personal computers, children's toys, PADs and other terminal equipment. It is an important component that affects the sound reproduction effect of end products. With the rapid development of the information industry and the electronics industry, thinning has become a new development trend in the design of micro speakers.
  • a micro speaker generally includes a magnetic circuit system and a vibration system. After the voice coil of the vibration system is energized, a current is generated. Under the action of the magnetic field lines of the magnetic circuit system, the voice coil and the diaphragm are driven to move up and down, and the diaphragm is thus compressed air to generate electricity. sound. Because the bottom of the voice coil is suspended in the air and limited by the manufacturing accuracy, the mass distribution of the vibration system is uneven, which will cause the vibration of the vibration system to be polarized when the speaker is working, that is, one side has a small amplitude and one side has a large amplitude. The limited size of the micro-speaker makes the gap between the vibration system and the magnetic circuit system extremely small. The polarization problem will cause the lead wire of the product to be disconnected, or the voice coil will collide with the magnet, resulting in poor hearing and other problems.
  • the main purpose of the present invention is to provide a loudspeaker and electronic equipment, aiming at effectively preventing the polarizing of the loudspeaker and improving the acoustic performance of the loudspeaker.
  • the present invention provides a loudspeaker, the loudspeaker comprising:
  • the casing is provided with a cavity
  • the magnetic circuit system is arranged in the cavity
  • the vibration system is arranged in the cavity and opposite to the magnetic circuit system;
  • the anti-polarization mechanism is arranged between the magnetic circuit system and the vibration system, and is connected with the magnetic circuit system and the vibration system, the anti-polarization mechanism is provided with a deformation cavity, and the When the vibration system vibrates, the anti-polarization mechanism is elastically deformed.
  • the anti-polarization mechanism includes at least one link structure, and the link structure includes:
  • the first connection side is connected with the magnetic circuit system
  • the second connecting edge is disposed opposite the first connecting edge and is connected to the vibration system;
  • each side part is arranged oppositely, the two ends of each side part are respectively connected with the first connecting edge and the second connecting edge, the first connecting edge, The second connecting edge and the two side edge portions are enclosed to form the deformation cavity, and each of the side edge portions is provided with at least one first deformation edge.
  • each of the side portions includes at least two side edges, and two adjacent side edges are connected at an included angle to form the first deformed edge.
  • the shape of the cross section of the connecting rod structure is a hexagon, an octagon or a decagon.
  • the anti-polarization mechanism includes a plurality of the link structures
  • a plurality of the connecting rod structures are arranged at intervals; or, a plurality of the connecting rod structures are arranged crosswise.
  • the anti-polarization mechanism includes a plurality of the connecting rod structures, and the magnetic circuit system is arranged in a rectangle;
  • a plurality of the connecting rod structures are arranged in parallel and spaced apart along the long side direction of the magnetic circuit system; or, a plurality of the connecting rod structures are arranged in parallel and spaced apart along the short side direction of the magnetic circuit system; Or, a plurality of the connecting rod structures are arranged vertically.
  • the connecting rod structure further includes at least one connecting end, two ends of the connecting end are connected with the ends of the first connecting edge and the second connecting edge, and the connecting end There is a gap between the side part and the two side parts, the connecting end is provided with at least one second deformation edge, and the plane where the second deformation edge and the first deformation edge are located is the same as the The first connecting edge and the second connecting edge are arranged in parallel.
  • a limit slot is provided on a side of the magnetic circuit system facing the vibration system, and the first connecting edge is accommodated in the limit slot.
  • the height of the limiting groove is defined as H
  • the thickness of the first connecting edge is defined as W
  • the height H of the limiting groove satisfies the relational formula: H>2W;
  • the width of the limiting groove is defined as L 1
  • the width of the first connecting edge is defined as L 2
  • the length from the first connecting edge to the first deformed edge is defined as L 3
  • the width of the limiting groove is L 1 , which satisfies the relation: L 1 >L 2 +2L 3 .
  • the magnetic circuit system includes:
  • the magnetic conductive yoke is arranged in the cavity
  • the central magnetic circuit portion is arranged on the magnetic conductive yoke, the limiting slot is provided on the side of the central magnetic circuit portion facing away from the magnetic conductive yoke, and the first connecting edge accommodates in the limiting slot and connected with the central magnetic circuit portion;
  • a side magnetic circuit portion is provided on the magnetic permeable yoke and is arranged around the central magnetic circuit portion, and a magnetic gap is formed between the side magnetic circuit portion and the central magnetic circuit portion.
  • the central magnetic circuit portion includes a central magnet and a central washer, the central magnet is disposed on the magnetic conductive yoke, and the central washer is disposed on the central magnet facing away from the magnetic conductive yoke On one side of the center washer, the side of the center washer facing away from the center magnet is provided with the limiting slot, and the limiting slot is a groove structure or a through-slot structure.
  • the vibration system includes:
  • a diaphragm the periphery of the diaphragm is connected with the casing;
  • a voice coil one end of the voice coil is connected to the side of the diaphragm facing the central magnetic circuit part, and the other end of the voice coil is suspended in the magnetic gap and is arranged around the anti-polarization mechanism ;
  • the spherical top is arranged in the middle of the diaphragm and connected with the second connecting edge.
  • the vibrating membrane includes an inner ring portion, a folding ring portion arranged around the inner ring portion, and a fixing portion arranged on the outer periphery of the folding ring portion, and the fixing portion is connected with the outer casing, so that the The voice coil is connected to the inner ring portion, and the dome is connected to a side of the inner ring portion facing away from the voice coil.
  • the first connecting edge, the second connecting edge and the two side edge portions include a base body and a reinforcing member covering the surface of the base body, the base body is a polymer fiber, and the The reinforcement is metal or composite.
  • the present invention also provides an electronic device, comprising a casing and the above-mentioned speaker, wherein the loudspeaker is arranged in the casing.
  • the loudspeaker forms the main part of the loudspeaker by arranging a cavity in the casing, and disposing the magnetic circuit system in the cavity, so that the vibration system is arranged in the cavity and opposite to the magnetic circuit system, thereby forming the main part of the loudspeaker.
  • An anti-polarization mechanism is set between the magnetic circuit system and the vibration system, and the anti-polarization mechanism is provided with a deformation cavity, which is connected with the magnetic circuit system and the vibration system, so that when the vibration system vibrates, the deformation cavity of the anti-polarization mechanism can make the vibration system Drive the anti-polarization mechanism to stretch and compress in the vertical direction, that is, the anti-polarization mechanism undergoes elastic deformation.
  • the anti-polarization mechanism resists polarization through its own stiffness, and the rigidity of the vibration system is far. It is smaller than the stiffness of the anti-polarization mechanism, so the polarization of the vibration system will be corrected by the anti-polarization mechanism, so the polarization situation will be greatly improved.
  • the loudspeaker of the present invention can effectively prevent polarization, thereby improving the acoustic performance of the loudspeaker.
  • FIG. 1 is a schematic structural diagram of a speaker in an embodiment of the present invention.
  • FIG. 2 is an exploded schematic diagram of a speaker in an embodiment of the present invention.
  • FIG. 3 is an exploded schematic diagram of a speaker in another embodiment of the present invention.
  • FIG. 4 is a schematic cross-sectional view of a speaker according to an embodiment of the present invention.
  • FIG. 5 is a partial cross-sectional schematic diagram of a speaker according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a connecting rod structure in an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a connecting rod structure in another embodiment of the present invention.
  • the width of the limiting groove is defined as L 1
  • the width of the first connecting edge is defined as L 2
  • the length from the first connecting edge to the first deformed edge is defined as L 3 , L 1 >L 2 +2*L 3 .
  • Speaker is a transducer device that converts electrical signals into acoustic signals. It is widely used in personal computers, children's toys, PADs and other terminal equipment. It is an important component that affects the sound reproduction effect of end products. With the rapid development of the information industry and the electronics industry, thinning has become a new development trend in the design of micro speakers.
  • Micro speakers generally include a magnetic circuit system and a vibration system. After the voice coil of the vibration system is energized, a current is generated. Under the action of the magnetic field lines of the magnetic circuit system, the voice coil and the diaphragm are driven to move up and down, and the diaphragm thus compresses the air to generate sound. Because the bottom of the voice coil is suspended in the air and limited by the manufacturing accuracy, the mass distribution of the vibration system is uneven, which will cause the vibration of the vibration system to be polarized when the speaker is working, that is, one side has a small amplitude and one side has a large amplitude. The limited size of the micro-speaker makes the gap between the vibration system and the magnetic circuit system extremely small. The polarization problem will cause the lead wire of the product to be disconnected, or the voice coil will collide with the magnet, resulting in poor hearing and other problems.
  • the present invention provides a speaker 100 .
  • the speaker 100 is applied to an electronic device, and the electronic device may be an electronic terminal, such as a mobile phone, a stereo, a computer, an earphone, a watch, a TV or a tablet computer, etc., which is not limited herein.
  • the speaker 100 includes a housing 1, a magnetic circuit system 2, a vibration system 3 and an anti-polarization mechanism 4, wherein the housing 1 is provided with a cavity 11;
  • the circuit system 2 is set in the cavity 11;
  • the vibration system 3 is set in the cavity 11 and is set opposite to the magnetic circuit system 2;
  • the anti-polarization mechanism 4 is set between the magnetic circuit system 2 and the vibration system 3, and is connected with the magnetic circuit system 2.
  • the system 2 is connected to the vibration system 3, the anti-polarization mechanism 4 is provided with a deformation cavity 411, and the anti-polarization mechanism 4 is elastically deformed when the vibration system 3 vibrates.
  • the housing 1 is used to install, fix and protect the magnetic circuit system 2 , the vibration system 3 , the anti-polarization mechanism 4 and other components of the speaker 100 .
  • mounting shell, mounting bracket and other structures are not limited here.
  • the casing 1 is a metal part, the magnetic circuit system 2 and the casing 1 are fixed by bonding.
  • the housing 1 is plastic injection-molded, the side magnetic conductive plates of the magnetic circuit system 2 are firstly injected into the housing 1 as inserts, and then other parts are glued and fixed.
  • the magnetic circuit system 2 is provided with a magnetic gap 24
  • the vibration system 3 includes a diaphragm 31 and a voice coil 32
  • the diaphragm 31 of the vibration system 3 is arranged opposite to the magnetic circuit system 2
  • the periphery of the diaphragm 31 is connected to the outer casing. 1 connection
  • the voice coil 32 is arranged on the side of the diaphragm 31 facing the magnetic circuit system 2 , and the end of the voice coil 32 away from the diaphragm 31 is suspended in the magnetic gap 24 of the magnetic circuit system 2 .
  • the voice coil 32 When the voice coil 32 is connected to the external circuit, the voice coil 32 is used to transfer the electrical energy to the magnetic gap 24 of the magnetic circuit system 2, and under the action of the magnetic field lines generated by the magnetic gap 24, the voice coil 32 and the diaphragm 31 move up and down, That is, the magnetic field generated by the magnetic circuit system 2 is used to convert electrical energy into mechanical energy, so that the voice coil 32 vibrates, and drives the diaphragm 31 of the vibration system 3 to vibrate and produce sound, and further convert the mechanical energy into sound energy.
  • the voice coil 32 disposed in the magnetic gap 24 receives the externally changing AC signal, it is driven by the magnetic field force of the magnetic circuit system 2 to perform a reciprocating motion of cutting the magnetic lines of force, which drives the diaphragm 31 of the vibration system 3 to vibrate and emit sound. .
  • the anti-polarization mechanism 4 is provided between the magnetic circuit system 2 and the vibration system 3, and the anti-polarization mechanism 4 is provided with a deformation cavity 411, and is connected with the magnetic circuit system 2 and the vibration system 3, so that the vibration system When the diaphragm 31 of 3 vibrates, the deformation cavity 411 of the anti-polarization mechanism 4 can enable the diaphragm 31 or the dome 33 of the vibration system 3 to drive the anti-polarization mechanism 4 to stretch and compress in the vertical direction.
  • the anti-polarization mechanism 4 resists the polarization through its own stiffness, and the rigidity of the vibration system 3 is much smaller than the stiffness of the anti-polarization mechanism 4, so the polarization of the vibration system 3 will be blocked by the anti-polarization mechanism 4. Correction, so the polarization situation will be greatly improved.
  • the loudspeaker 100 of the present invention forms the loudspeaker 100 by disposing the cavity 11 in the housing 1 and disposing the magnetic circuit system 2 in the cavity 11, so that the vibration system 3 is disposed opposite the magnetic circuit system 2 and connected to the housing 1, thereby forming the loudspeaker 100
  • the main body part of the magnetic circuit system 2 is further provided with an anti-polarization mechanism 4 between the magnetic circuit system 2 and the vibration system 3, and the anti-polarization mechanism 4 is provided with a deformation cavity 411, and is connected with the magnetic circuit system 2 and the vibration system 3, so that in the vibration system 3
  • the deformation cavity 411 of the anti-polarization mechanism 4 can enable the vibration system 3 to drive the anti-polarization mechanism 4 to stretch and compress in the vertical direction, that is, the anti-polarization mechanism 4 is elastically deformed.
  • the anti-polarization mechanism 4 resists polarization through its own stiffness, and the rigidity of the vibration system 3 is much smaller than that of the anti-polarization mechanism 4, so the polarization of the vibration system 3 will be corrected by the anti-polarization mechanism 4, so the polarization situation will be extremely Great improvement.
  • the speaker 100 of the present invention can effectively prevent polarization, thereby improving the acoustic performance of the speaker 100 .
  • the anti-polarization mechanism 4 includes at least one link structure 41 .
  • the link structure 41 includes a first connecting edge 412 , a second connecting edge 413 and two side parts 414 , wherein the first connecting edge 412 is connected with the magnetic circuit system 2 ; the second connecting edge 413 is connected with The first connecting edge 412 is arranged oppositely and is connected with the vibration system 3; the two side portions 414 are arranged oppositely, and the two ends of each side portion 414 are respectively connected with the first connecting edge 412 and the second connecting edge 413.
  • the connecting edge 412 , the second connecting edge 413 and the two side portions 414 enclose the deformation cavity 411 , and each side portion 414 is provided with at least one first deforming edge 4141 .
  • first connecting edge 412 and the second connecting edge 413 are in a planar plate-like structure, and the first connecting edge 412 and the second connecting edge 413 are arranged in parallel and spaced apart.
  • the two side portions 414 are located between the first connecting side 412 and the second connecting side 413, and are arranged oppositely, and two ends of each side portion 414 are connected with the first connecting side 412 and the second connecting side 413, In this way, the first connecting edge 412 , the second connecting edge 413 and the two side edge portions 414 are enclosed to form the deformation cavity 411 .
  • a connecting plane is formed on the side of the first connecting edge 412 facing away from the second connecting edge 413 , and the connecting plane is connected to the magnetic circuit system 2 , and the side of the second connecting edge 413 facing away from the first connecting edge 412 is formed
  • a connection plane which is connected to the vibration system 3 .
  • the connecting rod structure 41 can only move up and down. Therefore, when the vibration system 3 is polarized, the second connecting edge 413 of the link structure 41 is connected with the two side portions 414 to form its own rigidity, so that the second connecting edge 413 and the two side portions 414 pass through their own rigidity. It resists the polarization of the vibration system 3, and the stiffness of the vibration system 3 is much smaller than the stiffness of the connecting rod structure 41, so the polarization of the vibration system 3 will be corrected by the connecting rod structure 41, so the polarization situation will be greatly improved.
  • the two side portions 414 are located on opposite sides of the first connecting side 412/the second connecting side 413, and each side portion 414 forms an included angle with the first connecting side 412/the second connecting side 413 It is provided that the included angle formed by the connection between the side portion 414 and the first connecting edge 412/the second connecting edge 413 is not equal to 90° or 180°.
  • the first connecting edge 412 includes a base body and a reinforcing member covering the surface of the base body.
  • the matrix is a polymer fiber (such as aramid, glass fiber) and other anti-fatigue soft materials
  • the reinforcement is a metal or composite material (such as a carbon fiber sheet) or other material with an elastic modulus greater than 70 Gpa, thereby It can meet the structural strength requirements of the reinforcement.
  • the second connecting edge 413 includes a base body and a reinforcing member covering the surface of the base body.
  • the matrix is a polymer fiber (such as aramid, glass fiber) and other anti-fatigue soft materials
  • the reinforcement is a metal or composite material (such as a carbon fiber sheet) or other material with an elastic modulus greater than 70 Gpa, thereby It can meet the structural strength requirements of the reinforcement.
  • each side portion 414 includes a base and a reinforcing member covering the surface of the base.
  • the matrix is a polymer fiber (such as aramid, glass fiber) and other anti-fatigue soft materials
  • the reinforcement is a metal or composite material (such as a carbon fiber sheet) or other material with an elastic modulus greater than 70 Gpa, thereby It can meet the structural strength requirements of the reinforcement.
  • first connecting edge 412 , the second connecting edge 413 and the two side parts 414 of the link structure 41 are formed by using polymer fibers as the matrix, and metal or composite materials as reinforcements to cover the surface of the matrix.
  • polymer fibers as the matrix
  • metal or composite materials as reinforcements to cover the surface of the matrix.
  • aramid fiber or other polymer (fiber) materials can also be used as the matrix to cover high-strength materials such as aluminum reinforcements or composite materials (such as carbon fiber), etc., to form the first connecting edge 412 and the second connecting edge of the connecting rod structure 41 .
  • the connecting edge 413 and the two side edge portions 414 are not limited herein.
  • each side portion 414 includes at least two side edges 4142 , and two adjacent side edges 4142 are connected at an included angle to form a first deformed edge 4141 .
  • the side portion 414 includes two, three, four, five or more side edges 4142, and the side edges 4142 at the two ends of the side portion 414 are respectively connected with the first connecting edge 412 and the second connecting edge 412.
  • the sides 413 are connected, and the two adjacent side edges 4142 of the side portion 414 are connected at an included angle to form a first deformed edge 4141 , that is, a first deformed edge 4141 is formed at the connection of two adjacent side edges 4142 .
  • the included angle formed by the connection of the two side edges 4142 is not equal to 90° or 180°.
  • the shape of the cross section of the link structure 41 is a hexagon, an octagon, or a decagon, etc., which is not limited in the present invention.
  • the anti-polarization mechanism 4 includes a plurality of link structures 41 . It can be understood that the plurality of link structures 41 of the anti-polarization mechanism 4 may be arranged at intervals or intersected, which is not limited herein.
  • the magnetic circuit system 2 is arranged in a rectangular parallelepiped shape, and the plurality of link structures 41 are arranged in parallel and spaced apart along the longitudinal direction of the magnetic circuit system 2; or, the plurality of link structures 41 are arranged along the length of the magnetic circuit system 2.
  • the short side directions are parallel and spaced apart.
  • the ability of the plurality of link structures 41 to resist polarization in the radial direction is stronger than the ability to resist polarization in the axial direction. Therefore, when the multiple link structures 41 are placed, their axial directions should be perpendicular to the main polarization direction, that is, the multiple link structures 41 are arranged in parallel and at intervals along the long or short side of the magnetic circuit system 2 .
  • the plurality of link structures 41 are arranged vertically. It can be understood that the ability of the multiple link structures 41 to resist polarization in the radial direction is stronger than the ability to resist polarization in the axial direction. When the multiple link structures 41 are placed, their axial directions should be perpendicular to the main polarization direction. At the same time, in order to enhance the ability of suppressing polarization in another direction, a plurality of connecting rod structures 41 may be additionally arranged vertically to form a cross-shaped layout, as shown in FIG. 3 .
  • the link structure 41 further includes at least one connecting end 415 , and two ends of the connecting end 415 are connected to the ends of the first connecting edge 412 and the second connecting edge 413 .
  • This layout can be arranged separately or combined into one, sharing the first connecting edge 412 and the second connecting edge 413 to simplify the number of components, which is not limited here.
  • the connecting end portion 415 by disposing the connecting end portion 415 at the end of the connecting rod structure 41 , the two ends of the connecting end portion 415 are connected to the ends of the first connecting edge 412 and the second connecting edge 413 , so that they are connected to each other.
  • the two vertically arranged connecting rod structures 41 are combined into one and share the first connecting edge 412 and the second connecting edge 413 , which simplifies the number of components, which is not limited here. It can be understood that there is a gap 4152 between the connecting end portion 415 and the two side portions 414 , so that the connecting end portion 415 does not affect the deformability of the connecting rod structure 41 .
  • the connecting end portion 415 is provided with at least one second deformed edge 4151 , that is, the connecting end portion 415 includes two, three, four, five or more side plates, and the two ends of the connecting end portion 415
  • the side plates of the first connecting edge 412 and the end of the second connecting edge 413 are respectively connected, and the two adjacent side plates of the connecting end 415 are connected at an included angle, and form a second deformed edge 4151, which is the same
  • a second deformed edge 4151 is formed adjacent to the connection between the two side plates.
  • the included angle formed by the connection of the two side plates of the connection end 415 is not equal to 90° or 180°.
  • a limit slot 223 is provided on the side of the magnetic circuit system 2 facing the vibration system 3 , and the first connecting edge 412 is accommodated in the limit slot 223 .
  • the limit slot 223 is used to realize the limit installation of the connecting rod structure 41, so as to avoid the displacement of the connecting rod structure 41, thereby affecting the anti-polarization of the connecting rod structure 41. performance.
  • the setting of the limiting groove 223 makes the connecting rod structure 41 move down, so as to avoid occupying the vibration space. Continue to dig grooves on the center magnet 221, and the link structure 41 can move down further, which is not limited herein.
  • the limiting slot 223 can also be arranged on the side of the vibration system 3 facing the magnetic circuit system 2 , so that the second connecting edge 413 is accommodated in the limiting slot 223 .
  • both the vibration system 3 and the magnetic circuit system 2 are provided with limit slots 223 , which are not limited herein.
  • the height of the limiting groove 223 is defined as H
  • the thickness of the first connecting edge 412 is defined as W
  • the height H of the limiting groove 223 satisfies the relationship: H>2W.
  • the height H of the limiting slot 223 is the depth of the limiting slot 223 in the direction perpendicular to the magnetic circuit system 2 .
  • the thickness W of the first connecting edge 412 is the thickness of the first connecting edge 412 in the direction perpendicular to the magnetic circuit system 2 .
  • the width of the limiting groove 223 is defined as L 1
  • the width of the first connecting edge 412 is defined as L 2
  • the length from the first connecting edge 412 to the first deforming edge 4141 is defined. is L 3
  • the width of the limiting groove 223 is L 1 to satisfy the relation: L 1 >L 2 +2L 3 .
  • the width L 1 of the limiting slot 223 is the length of the limiting slot 223 along the short side direction of the magnetic circuit system 2 .
  • the width L 2 of the first connection side 412 is the length of the first connection side 412 along the short side direction of the magnetic circuit system 2 .
  • the magnetic circuit system 2 faces the vibration.
  • One side surface of the system 3 is grooved to form a limiting groove 223 , and the first connecting edge 412 of the connecting rod structure 41 is placed at the bottom of the limiting groove 223 , as shown in FIGS. 4 and 5 .
  • the height H of the limiting groove 223 needs to be greater than twice the thickness W of the first connecting edge 412 , that is, H>2W.
  • the thickness of the first connecting edge 412 is equal to the thickness of the second connecting edge 413 .
  • the width L 1 of the limiting groove 223 needs to be greater than the total width of the connecting rod structure 41 at the compression limit (the width of the first connecting edge 412 and the length of one side edge), that is, L 1 >L 2 +2L 3 .
  • the setting of the limit slot 223 may cause the magnetic permeability of the magnetic circuit system 2 to be weakened.
  • the simulation results are analyzed as shown in the following table:
  • the limiting slot 223 Since the limiting slot 223 is located in the center of the magnetic circuit system 2, it has little effect on the magnetic permeability of the overall magnetic circuit system 2. As shown in the above table, the change of the BL value of the speaker 100 can be ignored. Therefore, the setting of the limiting groove 223 will not affect the performance of the speaker 100 .
  • the magnetic circuit system 2 includes a magnetic conductive yoke 21 , a central magnetic circuit portion 22 and a side magnetic circuit portion 23 , wherein the magnetic conductive yoke 21 is arranged in the cavity 11 ;
  • the central magnetic circuit portion 22 is disposed on the magnetic conductive yoke 21 , and a limiting groove 223 is provided on the side of the central magnetic circuit portion 22 facing away from the magnetic conducting yoke 21 . 22 is connected;
  • the side magnetic circuit portion 23 is arranged on the magnetic conductive yoke 21 and is arranged around the central magnetic circuit portion 22 , and a magnetic gap 24 is formed between the side magnetic circuit portion 23 and the central magnetic circuit portion 22 .
  • the magnetic conductive yoke 21 is fixed to the housing 1 , the central magnetic circuit portion 22 and the side magnetic circuit portion 23 are provided on the side of the magnetic conductive yoke 21 facing the vibration system 3 , and the side magnetic circuit portion 23 surrounds the central magnetic circuit
  • the voice coil 32 of the vibration system 3 is suspended in the magnetic gap 24, that is, between the central magnetic circuit portion 22 and the side magnetic circuit portion 23.
  • the side magnetic circuit portion 23 that is, the side magnetic circuit portion 23 without interruption design has a larger volume, so that the magnetic field strength is higher, thereby improving the acoustic performance of the speaker 100 .
  • the central magnetic circuit portion 22 includes a central magnet 221 and a central washer 222 .
  • the side of the guide yoke 21 and the side of the center washer 222 facing away from the center magnet 221 is provided with a limiting slot 223 , and the limiting slot 223 is a groove structure or a through-slot structure.
  • the side magnetic circuit portion 23 includes a side magnet 231 and a side washer 232.
  • the side magnet 231 is arranged on the magnetic conducting yoke 21 and is arranged around the center magnetic circuit portion 22. side.
  • the limiting slot 223 may be provided at the center of the center magnet 221 .
  • the central magnet 221 and the central washer 222 have the same structural outline, and the central magnet 221 and the central washer 222 can be selected as plate-like structures.
  • the side magnets 231 and the side washer 232 have the same structure and outline, and the side magnets 231 and the side washer 232 can be optionally a ring-shaped structure or a plurality of strip-shaped structures, which are not limited herein.
  • edge washer 232 can be fixed to the magnetic conductive yoke 21 and abut against the edge magnet 231 .
  • the edge washer 232 can also be disposed in the housing 1 , so that the edge washer 232 and the housing 1 are provided as an integral structure, thereby simplifying the processing technology of the speaker 100 .
  • the materials of the casing 1 and the edge washer 232 are both metal materials, which is beneficial to improve the heat conduction and heat dissipation effect.
  • the vibration system 3 includes a diaphragm 31 , a voice coil 32 and a dome 33 , wherein the periphery of the diaphragm 31 is connected to the housing 1 ; one end of the voice coil 32 is connected to the The side of the membrane 31 facing the central magnetic circuit portion 22 is connected, the other end of the voice coil 32 is suspended in the magnetic gap 24, and is arranged around the anti-polarization mechanism 4; the dome 33 is arranged in the middle of the diaphragm 31, and is connected with the second The connecting edge 413 is connected.
  • the diaphragm 31 includes an inner ring portion 311 , a folding ring portion 312 disposed around the inner ring portion 311 , and a fixing portion 313 disposed on the outer periphery of the folding ring portion 312 .
  • the fixing portion 313 is connected to the housing 1 , and the voice coil 32 Connected to the inner ring portion 311 , the dome 33 is connected to the side of the inner ring portion 311 facing away from the voice coil 32 .
  • the inner ring portion 311 , the folding ring portion 312 and the fixing portion 313 of the diaphragm 31 are integrally formed.
  • the inner ring portion 311 of the diaphragm 31 is surrounded by an opening, and the dome 33 is arranged corresponding to the opening formed by the inner ring portion 311.
  • the inner ring portion 311 has oppositely arranged upper and lower sides, so The peripheral edge of the spherical top 33 is connected to the upper side or the lower side, so that the central portion of the diaphragm 31 is reinforced by the spherical top 33 .
  • the inner ring portion 311 is a hollow structure.
  • the inner ring portion 311 may be a flat plate structure connected as a whole, so that the inner ring portion 311 has an upper side and a lower side arranged oppositely, and the dome 33 is connected to the upper side or the lower side.
  • the lower side is connected to reinforce the central portion of the diaphragm 31 by the dome 33 .
  • the folding ring portion 312 is convex or concave
  • the fixing portion 313 is formed by extending outward from the outer edge of the folding ring portion 312 .
  • the fixing portion 313 may be connected to the housing 1 by means of bonding or welding, which is not limited herein.
  • the fixing portion 313 can also be formed by extending downward from the outer edge of the folded ring portion 312, that is, the fixing portion 313 and the outer wall of the housing 1 are bonded or the like. connect.
  • a plurality of positioning portions are provided on the outer side of the ring portion 312 , that is, each length of the diaphragm 31 is A positioning portion is provided at the connection between the side and each short side, so that a plurality of positioning portions are arranged at intervals.
  • each positioning portion is formed by bending and extending the outer edge of the ring portion 312 outward, that is, the extending direction of the positioning portion and the extending direction of the fixing portion 313 are perpendicular to each other, so that the fixing portion 313 and a plurality of The edges of the positioning parts are connected and arranged vertically.
  • the diaphragm 31 is covered with the opening of the cavity 11 of the casing 1, the plurality of positioning portions of the diaphragm 31 are in limited contact with the end of one end of the casing 1, so that the diaphragm 31 can be effectively installed in a limited position.
  • the vibration performance of the diaphragm 31 is ensured, so as to improve the acoustic performance of the speaker 100 .
  • the vibrating membrane 31 is arranged in a rectangular shape, that is, the vibrating membrane 31 has two long sides and two short sides, and the ring portion 312 of the vibrating membrane 31 and the fixing portion 313 are enclosed to form a limit space, so that the vibrating membrane When 31 covers the opening of the cavity 11 of the housing 1, the fixed portion 313 of the diaphragm 31 abuts against the outer wall of the housing 1, thereby effectively improving the connection stability and improving the sealing and waterproof performance.
  • the anti-polarization mechanism 4 is arranged between the diaphragm 31 of the vibration system 3 and the center washer 222 of the magnetic circuit system 2, so that the link structure 41 of the anti-polarization mechanism 4 is connected to the center washer 222 and the diaphragm. 31 / dome 33 is connected so that the polarization of the vibration system 3 is limited by the link structure 41 .
  • the speaker 100 relies on the mechanical structure of the link structure 41 to physically suppress the occurrence of polarization of the vibration system 3 without affecting the size and performance of the speaker 100 .
  • the connecting rod structure 41 can use polymer fibers as the base body, and use aluminum or other reinforcements to cover the surface of the base body, so as to form the first connecting edge 412 , the second connecting edge 413 , and the two side edges of the connecting rod structure 41 . part 414 and the connecting end part 415, so that the link structure 41 neither affects the performance of the speaker 100, but can also generate rigidity against polarization.
  • the link structure 41 can limit the polarization trends in both X and Y directions at the same time.
  • the second connecting edge 413 of the polygonal link structure 41 When the vibration system 3 of the speaker 100 vibrates up and down, the second connecting edge 413 of the polygonal link structure 41 is connected to the dome 33 of the vibration system 3, so the second connecting edge 413 of the link structure 41 will be together with the dome 33 Make vertical movements up and down. The movement of the second connecting edge 413 will drive the polygonal link structure 41 to perform a stretching and compressing movement in the vertical direction. Due to the geometrical limitation of polygons, the link structure 41 can only move up and down.
  • the second connecting edge 413 and its polygonal link structure 41 will resist the polarization through its own stiffness, and the stiffness of the vibration system 3 is much smaller than that of the polygon link structure 41, so the vibration system The polarization of 3 will be corrected by the polygon link structure 41, so the polarization situation will be greatly improved.
  • the present invention also provides an electronic device, the electronic device includes a housing and a speaker 100, and the speaker 100 is arranged in the housing.
  • the specific structure of the speaker 100 refers to the foregoing embodiments. Since this electronic device adopts all the technical solutions of the foregoing embodiments, it has at least all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be repeated here. .
  • the casing is provided with a cavity, and the speaker 100 is provided in the cavity.
  • the electronic device may be an electronic device, such as a mobile phone, a stereo, a computer, an earphone, a watch, a TV, or a tablet computer, etc., which is not limited herein.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

L'invention concerne un haut-parleur et un dispositif électronique ; ledit haut-parleur comprend un boîtier, un système de circuit magnétique, un système de vibration et un mécanisme d'anti-polarisation ; ledit boîtier est muni d'une chambre de logement ; ledit système de circuit magnétique est disposé dans ladite chambre de logement ; ledit système de vibration est disposé dans la chambre de logement et agencé à l'opposé du système de circuit magnétique ; ledit mécanisme d'anti-polarisation est disposé entre le système de circuit magnétique et le système de vibration, et est relié au système de circuit magnétique et au système de vibration, le mécanisme d'anti-polarisation étant muni d'une chambre de déformation, et le mécanisme d'anti-polarisation subissant une déformation élastique lorsque le système de vibration vibre. La présente invention vise à empêcher efficacement l'apparition de la polarisation dans le haut-parleur, améliorant ainsi les performances acoustiques du haut-parleur.
PCT/CN2021/135687 2020-12-09 2021-12-06 Haut-parleur et dispositif électronique WO2022121836A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011435856.3A CN112492464B (zh) 2020-12-09 2020-12-09 扬声器和电子设备
CN202011435856.3 2020-12-09

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WO2022121836A1 true WO2022121836A1 (fr) 2022-06-16

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CN112492464B (zh) * 2020-12-09 2022-03-25 歌尔股份有限公司 扬声器和电子设备

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CN105812998A (zh) * 2016-04-27 2016-07-27 创达电子(潍坊)有限公司 一种平衡电枢扬声器
CN205961430U (zh) * 2016-07-18 2017-02-15 歌尔股份有限公司 一种扬声器
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CN110662139A (zh) * 2019-09-30 2020-01-07 歌尔股份有限公司 一种发声装置及辅助振动方法
CN111918188A (zh) * 2020-07-10 2020-11-10 瑞声科技（南京）有限公司 一种mems扬声器及其制造工艺
CN111918179A (zh) * 2020-07-10 2020-11-10 瑞声科技（南京）有限公司 发声装置及具有其的电子设备
CN211982130U (zh) * 2020-09-23 2020-11-20 共达电声股份有限公司 一种扬声器
CN112492464A (zh) * 2020-12-09 2021-03-12 歌尔股份有限公司 扬声器和电子设备

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CN206517605U (zh) * 2017-01-26 2017-09-22 厦门冠音泰科技有限公司 一种具有焊接弹片自勾结构的扬声器

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CN105812998A (zh) * 2016-04-27 2016-07-27 创达电子(潍坊)有限公司 一种平衡电枢扬声器
CN205961430U (zh) * 2016-07-18 2017-02-15 歌尔股份有限公司 一种扬声器
CN110662139A (zh) * 2019-09-30 2020-01-07 歌尔股份有限公司 一种发声装置及辅助振动方法
CN111918188A (zh) * 2020-07-10 2020-11-10 瑞声科技（南京）有限公司 一种mems扬声器及其制造工艺
CN111918179A (zh) * 2020-07-10 2020-11-10 瑞声科技（南京）有限公司 发声装置及具有其的电子设备
CN211982130U (zh) * 2020-09-23 2020-11-20 共达电声股份有限公司 一种扬声器
CN112492464A (zh) * 2020-12-09 2021-03-12 歌尔股份有限公司 扬声器和电子设备

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