WO2021104006A1 - 电声换能器、扬声器模组及电子设备 - Google Patents

电声换能器、扬声器模组及电子设备 Download PDF

Info

Publication number
WO2021104006A1
WO2021104006A1 PCT/CN2020/127758 CN2020127758W WO2021104006A1 WO 2021104006 A1 WO2021104006 A1 WO 2021104006A1 CN 2020127758 W CN2020127758 W CN 2020127758W WO 2021104006 A1 WO2021104006 A1 WO 2021104006A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
branch
side magnet
flexible circuit
pole piece
Prior art date
Application number
PCT/CN2020/127758
Other languages
English (en)
French (fr)
Inventor
刘金华
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20894300.1A priority Critical patent/EP4040802B1/en
Priority to US17/777,764 priority patent/US11937062B2/en
Publication of WO2021104006A1 publication Critical patent/WO2021104006A1/zh

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/04Construction, mounting, or centering of coil
    • H04R9/046Construction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/02Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12Non-planar diaphragms or cones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/025Magnetic circuit
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/04Construction, mounting, or centering of coil
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/04Construction, mounting, or centering of coil
    • H04R9/041Centering
    • H04R9/043Inner suspension or damper, e.g. spider
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/04Construction, mounting, or centering of coil
    • H04R9/045Mounting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/06Arranging circuit leads; Relieving strain on circuit leads
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10General applications
    • H04R2499/11Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/16Mounting or tensioning of diaphragms or cones
    • H04R7/18Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands

Definitions

  • the embodiments of the present application relate to the field of audio technology, and in particular, to an electroacoustic transducer, a speaker module, and an electronic device.
  • Moving-coil micro speakers are electro-acoustic transducers, which are commonly used audio components for portable electronic devices. As consumers have higher and higher requirements for the sound quality of electronic devices, speakers usually need to be designed with greater amplitude.
  • the speaker includes a voice coil and a wire connecting the voice coil. Since the wire needs to vibrate greatly along with the voice coil, flexible printed circuit (FPC) is used to form the wire in the industry to reduce the risk of the wire breaking due to fatigue .
  • FPC flexible printed circuit
  • the flexible circuit board Since the voice coil is inserted into the magnetic circuit of the speaker, the flexible circuit board needs to vibrate in the magnetic circuit with the voice coil. Therefore, the structural size of the flexible circuit board and the magnetic circuit size of the speaker affect each other, and there is a need to reserve between the two A certain design gap is designed to prevent friction between the flexible circuit board and the magnetic circuit when the flexible circuit board vibrates. Therefore, when the flexible circuit board adopts a longer design size in order to reduce the local stress during large-scale vibration, it will cause the size of the magnetic circuit to be shortened, which in turn leads to a decrease in the driving force of the speaker, and the sensitivity of the speaker is not good.
  • the purpose of this application is to provide an electroacoustic transducer, speaker module and electronic equipment with better sensitivity.
  • an embodiment of the present application provides an electro-acoustic transducer. Electroacoustic transducers are used to convert electrical signals into sound signals.
  • the electroacoustic transducer includes a center magnet, two first side magnets, two second side magnets, a voice coil, a sound film, and two flexible circuit boards.
  • the two first side magnets are symmetrically arranged on both sides of the center magnet, and a first gap is formed between the first side magnet and the center magnet.
  • the two second side magnets are symmetrically arranged on both sides of the center magnet, and the second side magnet is located on the side of the first side magnet away from the center magnet.
  • One end of the voice coil is located in the first gap, and the sound film is fixedly connected to the other end of the voice coil.
  • Two flexible circuit boards are arranged symmetrically on both sides of the central magnet.
  • the flexible circuit board is located on the side of the magnet on the first side away from the central magnet, and between the magnet on the second side and the sound film.
  • the two branches of the flexible circuit board The ends are respectively fixed to the two corners of the voice coil.
  • the electroacoustic transducer of this embodiment changes the relative positional relationship between the flexible circuit board and the first side magnet, As a result, the gap between the first side magnet and the center magnet is narrower, and the magnetic induction intensity of the magnetic circuit of the electroacoustic transducer is higher, which helps to improve the sensitivity of the electroacoustic transducer.
  • the electro-acoustic transducer uses the space below the flexible circuit board to add a pair of second side magnets, thereby effectively improving the magnetic induction intensity of its magnetic circuit, significantly increasing the driving force of the magnetic circuit, making the electro-acoustic transducer more Good sensitivity.
  • the first side magnet is spaced apart from the flexible circuit board.
  • the distance between the magnet on the first side and the flexible circuit board It can be in the range of 0.1 mm to 0.5 mm.
  • the second side magnet is spaced apart from the flexible circuit board.
  • the distance between the flexible circuit board and the second side magnet may be in the range of 0.1 mm to 0.7 mm.
  • the electro-acoustic transducer further includes a basin frame.
  • the frame of the basin frame includes a first surface and a second surface opposite to each other.
  • the periphery of the sound membrane is fixed to the first surface of the frame.
  • the voice coil is located inside the frame.
  • Both flexible circuit boards are partially fixed on the second surface of the frame. The part of the flexible circuit board that is not fixed to the frame can vibrate with the voice coil relative to the frame.
  • both the sound film and the flexible circuit board are fixed to the frame of the basin frame, so that the assembly accuracy of the two is higher.
  • the voice coil vibrates, it can better synchronously drive the sound film and the fixing fixed on the upper end of the voice coil.
  • the probability of roll vibration of the voice coil is small, so that the electro-acoustic transducer has better sound quality.
  • the periphery of the sound membrane can be fixed to the first surface of the frame of the basin frame by bonding.
  • the vibration direction of the sound membrane is parallel to the thickness direction of the electroacoustic transducer.
  • the inner space of the frame is formed into a shape with a narrow bottom and a wide top, so that the sound film has a larger vibration space, which is beneficial for the sound film to achieve a large vibration.
  • the sound diaphragm includes a diaphragm and a dome.
  • the dome is roughly in the shape of a rectangular plate.
  • the dome includes a top surface and a bottom surface arranged opposite to each other, and the peripheral area of the top surface of the dome is recessed to form a limiting groove.
  • the diaphragm is roughly in a rectangular ring shape.
  • the diaphragm includes a first fixing part, a vibrating part, and a second fixing part connected in sequence, the first fixing part is located inside the vibrating part, and the second fixing part is located outside the vibrating part.
  • the first fixing part of the diaphragm is partially received in the limiting groove of the dome and is fixed to the dome.
  • the bottom surface of the first fixing part of the diaphragm contacts the bottom wall of the limiting groove of the dome.
  • the top surface of the first fixing part of the diaphragm is flush with the top surface of the dome.
  • the cross-sectional shape of the vibrating part of the diaphragm is arc-shaped or approximately arc-shaped, and the extension track of the vibrating part is rectangular with rounded corners.
  • the vibrating part of the vibrating membrane is recessed, that is, the vibrating part is recessed in a direction away from the top surface of the first fixing part and the top surface of the second fixing part of the vibrating membrane. At this time, the vibrating part of the diaphragm can be deformed when receiving an external force, so that the first fixed part and the second fixed part move relative to each other, and the dome and the second fixed part move relative to each other.
  • the electroacoustic transducer can save the upper space thereof, and it is easy to restore the original shape after the diaphragm is deformed under the influence of water pressure or air pressure.
  • the sound diaphragm includes a diaphragm and a dome.
  • the dome is roughly in the shape of a rectangular plate.
  • the dome includes a top surface and a bottom surface opposite to each other, and the peripheral area of the bottom surface of the dome is concave to form a limiting groove.
  • the diaphragm is roughly in a rectangular ring shape.
  • the diaphragm includes a first fixing part, a vibrating part, and a second fixing part connected in sequence, the first fixing part is located inside the vibrating part, and the second fixing part is located outside the vibrating part.
  • the first fixing part of the diaphragm is partially received in the limiting groove of the dome and is fixed to the dome.
  • the top surface of the first fixing part of the diaphragm contacts the bottom wall of the limiting groove of the dome.
  • the bottom surface of the first fixing portion of the diaphragm is flush with the bottom surface of the dome.
  • the cross-sectional shape of the vibrating part of the diaphragm is arc-shaped or approximately arc-shaped, and the extension track of the vibrating part is rectangular with rounded corners.
  • the vibrating portion of the diaphragm is convexly arranged, that is, the vibrating portion is convex in a direction away from the bottom surface of the first fixing portion and the bottom surface of the second fixing portion of the diaphragm.
  • the vibrating part of the diaphragm can be deformed when receiving an external force, so that the first fixing part and the second fixing part move relative to each other, and the dome and the second fixing part move relative to each other.
  • the space under the diaphragm is released, and the magnetic circuit under the diaphragm is allowed to be set with a larger height dimension, thereby increasing the magnetic induction intensity of the electro-acoustic transducer.
  • Improve the sensitivity of the electroacoustic transducer because the vibrating part of the diaphragm is arranged convexly, the space under the diaphragm is released, and the magnetic circuit under the diaphragm is allowed to be set with a larger height dimension, thereby increasing the magnetic induction intensity of the electro-acoustic transducer.
  • the flexible circuit board includes a body, a first branch and a second branch.
  • the main body is fixed to the second surface of the frame.
  • the first branch includes a head end, an end and a connecting section connected between the head end and the end.
  • the second branch includes a head end, an end, and a connecting section connected between the head end and the end.
  • the head end of the first branch and the head end of the second branch are both connected to the middle of the body.
  • the end of the first branch is fixed to one corner of the voice coil, and the end of the second branch is fixed to the other corner of the voice coil.
  • the head end of the first branch and the head end of the second branch are arranged directly opposite to the second side magnet.
  • the first branch and the second branch are spaced apart from the second side magnet and the first side magnet.
  • the end of the first branch and the end of the second branch vibrate with the voice coil.
  • the connecting section of the first branch to the head end of the first branch the amplitude gradually decreases.
  • the connecting section of the second branch to the head end of the second branch the amplitude gradually decreases, and the amplitude of the head end of the first branch and the head end of the second branch is very small.
  • the second side magnet is directly facing the head end of the first stub and the head end of the second stub, so that it can have a larger height or a larger height locally to increase the magnetic field of the electroacoustic transducer. The magnetic flux density of the circuit.
  • the part of the connecting section of the first branch near the head end may be arranged directly opposite to the second side magnet, and the part of the connecting section of the second branch near the head end may be arranged directly opposite to the second side magnet.
  • the middle part of the main body can also be arranged directly opposite to the second side magnet.
  • the second side magnet is arranged directly opposite to the head end of the first stub, the head end of the second stub and the middle of the body. Therefore, the second side magnet can be fully positioned in the length direction of the electroacoustic transducer. Utilize the space below the flexible circuit board to have a larger size to effectively increase the magnetic induction intensity of the magnetic circuit.
  • the magnet on the second side is facing the head end of the first branch with smaller amplitude and the connecting section near the head end, the head end of the second branch and the connecting section near the head end, so the second side magnet can be used for electro-acoustic transduction.
  • the space under the flexible circuit board is fully utilized, so that it has a larger size to effectively improve the magnetic induction intensity of the magnetic circuit.
  • the head end of the first branch and the head end of the second branch are connected, and the two are connected to the middle of the body after splicing.
  • the head end of the first branch and the head end of the second branch are respectively connected to different positions in the middle of the body, and a gap is formed between the two.
  • the first branch and the second branch of the flexible circuit board are symmetrically arranged. At this time, when the voice coil vibrates, the stress on the two positions where the voice coil is connected to the flexible circuit board is relatively uniform, which is beneficial to the stable vibration of the voice coil.
  • the first branch includes a bent section and a straight section, one end of the bent section is connected to the end of the first branch, the other end of the bent section is connected to one end of the straight section, and the other end of the straight section One end is connected to the head end of the first branch, the bending section includes one or more arc segments, and each arc segment protrudes in a direction away from the central magnet.
  • the shape of the flexible circuit board can better adapt to the deformation and displacement requirements, so that the flexible circuit The board has better reliability and longer service life.
  • the bending section can also make full use of the outer space of the corner of the voice coil, thereby arranging longer-sized traces, so that the flexible circuit board will have less stress when the voice coil vibrates greatly, and the reliability of the flexible circuit board higher.
  • the end of the body arranged close to the bent portion can have a larger area, and the end of the body has both sufficient area and auxiliary diaphragm (see Later) are fixed to each other, and also have a sufficient area to be fixed to the external structure of the electro-acoustic transducer.
  • the voice coil is rectangular with rounded corners
  • the end of the first branch is fixedly connected to a rounded corner of the voice coil
  • each arc segment is coaxially arranged with the rounded corner of the voice coil connected to the first branch .
  • the shape of the flexible circuit board can better adapt to the deformation and displacement requirements, so that Flexible circuit boards have better reliability and longer service life.
  • the extension direction of the straight section of the first branch may be substantially parallel to the width direction of the electroacoustic transducer.
  • the length of the straight section is larger, so that the length of the flexible circuit board is longer, and it is easier to achieve a large amplitude.
  • the straight section occupies less space in the length direction of the electro-acoustic transducer, which is beneficial to suppress the space compression of the magnetic circuit by the flexible circuit board, so that the magnetic circuit has a larger layout space to ensure the electro-acoustic transducer The magnetic induction intensity and sensitivity of the device.
  • the bending section of the first branch also includes multiple transition sections.
  • the transition sections can be arranged between adjacent arc segments, or between arc segments and straight segments, or they can be arranged Between the arc segment and the end of the first branch.
  • the electroacoustic transducer further includes four auxiliary diaphragms.
  • the four auxiliary diaphragms are arranged at intervals on the side of the two flexible circuit boards away from the voice coil.
  • One ends of the four auxiliary diaphragms are respectively fixed to the ends of the first branch and the second branch of the two flexible circuit boards, and the other end of each auxiliary diaphragm is fixed to one end of the body of the adjacent flexible circuit board.
  • the two ends of each auxiliary diaphragm can move relative to each other.
  • the electroacoustic transducer includes two compliant systems, the sound membrane is the first compliant system located on the upper part of the voice coil, and the flexible circuit board and the auxiliary diaphragm are the second compliant system located on the lower part of the voice coil ,
  • the two compliant systems vibrate with the voice coil, which can suppress the roll vibration of the voice coil and help ensure the better sound quality of the electro-acoustic transducer.
  • the auxiliary diaphragm is roughly fan-shaped.
  • the auxiliary diaphragm includes a first fixing part, a vibrating part, and a second fixing part connected in sequence, the first fixing part is located inside the vibrating part, and the second fixing part is located outside the vibrating part.
  • the first fixing part is fixed to the end of the branch of the flexible circuit board, and the second fixing part is fixed to one end of the body of the flexible circuit board.
  • the cross-sectional shape of the vibrating part of the auxiliary diaphragm is arc-shaped or approximately arc-shaped, and the extension track of the vibrating part is arc-shaped.
  • the vibration part of the auxiliary diaphragm is recessed, that is, the vibration part is recessed in a direction away from the top surface of the first fixing part and the top surface of the second fixing part.
  • the first fixing part of the auxiliary diaphragm is fan-shaped.
  • a gap is formed on the side of the second fixing part of the auxiliary diaphragm away from the first fixing part. The vibrating part of the auxiliary diaphragm can be deformed when subjected to an external force, so that the first fixed part and the second fixed part move relative to each other.
  • one end of the auxiliary diaphragm fixed to the flexible circuit board exposes a part of the flexible circuit board.
  • the end of the body of the flexible circuit board can be exposed through the notch of the second fixing part of the auxiliary diaphragm.
  • the exposed area of the end of the body of the flexible circuit board relative to the auxiliary diaphragm can be used to connect other parts of the electro-acoustic transducer.
  • the extension track of the vibrating part of the auxiliary diaphragm is coaxially arranged with the rounded corner of the voice coil connected to the auxiliary diaphragm.
  • the shape of the vibration part of the auxiliary diaphragm can better adapt to the deformation and displacement requirements, so that the reliability of the auxiliary diaphragm is better and the use of Longer life.
  • the arc segments of the bent sections of the branches of the flexible circuit board are also coaxially arranged with the rounded corners of the voice coil, the bent sections of the branches of the flexible circuit board and the vibrating part of the auxiliary diaphragm are vibrating with the voice coil.
  • the deformation trend is similar, which can reduce the risk of collision between the two, making the electro-acoustic transducer more reliable.
  • the height of the first side magnet is greater than the height of the second side magnet.
  • the thickness direction of the center magnet is parallel to the thickness direction of the electroacoustic transducer.
  • the height of the first side magnet can be greater than the height of the second side magnet to make full use of space, Increasing the magnetic induction intensity of the magnetic circuit makes the sensitivity of the electro-acoustic transducer better.
  • the height of the first side magnet in the thickness direction of the electro-acoustic transducer, may be greater than the sum of the height of the second side magnet, the height of the flexible circuit board, and the distance between the second side magnet and the flexible circuit board.
  • the second side magnet includes a first surface and a second surface disposed opposite to each other, and the first surface faces the flexible circuit board.
  • the first surface includes a first plane, a first inclined surface, and a second inclined surface.
  • the first plane is parallel to the second surface.
  • One end of the first inclined surface is connected to one end of the first plane, and the other end of the first inclined surface is close to the first plane.
  • the two surfaces extend in the direction, one end of the second inclined surface is connected to the other end of the first plane, and the other end of the second inclined surface extends in a direction close to the second surface.
  • the second side magnet has a structure with a middle height and a gradually decreasing height on both sides.
  • the middle height position can be facing the part of the flexible circuit board with a small amplitude, and the position with the decreasing height on both sides can be facing the flexible circuit board.
  • the part where the amplitude gradually increases can not only reserve the vibration space of the flexible circuit board, but also make full use of the non-interference height and increase the size of the magnet, so that the magnetic induction intensity of the electro-acoustic transducer can be higher.
  • the size of the second side magnet in the width direction of the electro-acoustic transducer may be in the range of 2 mm to 10 mm.
  • the first plane faces the head end of the first branch and the head end of the second branch.
  • the first plane may also face other parts of the flexible circuit board with a smaller amplitude, for example, the part of the connecting section of the first branch near the head end and the part of the connecting section of the second branch near the head end.
  • the second side magnet has a larger volume, which can increase the magnetic induction intensity of the electroacoustic transducer.
  • the second inclined surface and the first inclined surface may be symmetrically arranged, and the symmetry plane is perpendicular to the second surface. Since the first branch and the second branch of the flexible circuit board are symmetrically arranged, and the vibration amplitudes of the two are symmetrical, the symmetrically arranged second inclined surface and the first inclined surface can better match the first branch. Match the vibration of the second branch.
  • the first side magnet and the second side magnet are of separate design, and the two can be fixed to each other by bonding adjacent surfaces. Since the second side magnet and the first side magnet have different shapes in the YZ plane (that is, the plane where the width direction and the thickness direction of the electroacoustic transducer are located), they are formed separately and then assembled into an integrated structure, which can reduce the cost. , Making the cost of the electro-acoustic transducer lower.
  • the first side magnet and the second side magnet may also be an integrally formed special-shaped magnet.
  • the second side magnets, the first side magnets and the center magnet are arranged in the first direction.
  • the size of the magnet on the first side in the second direction is the first width
  • the second direction is perpendicular to the first direction and the thickness direction of the center magnet
  • the size of the magnet on the second side in the second direction is the second width
  • the second width Less than the first width
  • the width of the second side magnet in the width direction of the electro-acoustic transducer is small, and the second side magnet is directly facing the part of the flexible circuit board with a small amplitude, for example, the first end and the second side of the first branch.
  • the first end of the two branches; the space on both sides of the second side magnet in the width direction of the electroacoustic transducer can be used as the vibration space of the flexible circuit board, facing the part with larger amplitude of the flexible circuit board, such as the first branch
  • the connecting segment and the connecting segment of the second branch is used as the vibration space of the flexible circuit board, facing the part with larger amplitude of the flexible circuit board, such as the first branch.
  • the second side magnet can also face other parts of the flexible circuit board with a smaller amplitude, such as the part of the connecting section of the first branch near the head end and the part of the connecting section of the second branch near the head end, so as to have a larger volume.
  • the second width of the second side magnet can be appropriately increased, or the height of the second side magnet can be reduced and the height of the second side magnet can be reduced while meeting the vibration space requirements of the first branch and the second branch.
  • the second width of the second side magnet is increased (in this case, the second width may be equal to or greater than the first width of the first side magnet), so that the volume of the second side magnet is larger.
  • the first surface of the second side magnet is parallel to the second surface.
  • the first surface faces the head end of the first branch and the head end of the second branch of the flexible circuit board.
  • the second side magnet further includes a first side surface and a second side surface.
  • the first side surface connects one end of the first surface and one end of the second surface, and the second side surface connects the other end of the first surface and the other end of the second surface.
  • the first side faces the connecting section of the first branch, and the second side faces the connecting section of the second branch.
  • the second side magnet makes full use of the space below the flexible circuit board, so that the electro-acoustic transducer has a higher magnetic induction intensity.
  • first side magnet and the second side magnet are integrally formed, which is beneficial to simplify the assembly process of the electroacoustic transducer and improve the assembly accuracy.
  • the second side magnets, the first side magnets and the center magnet are arranged in the first direction.
  • the cross-sectional shape of the magnet on the first side is the same as the cross-sectional shape of the magnet on the second side, and the cross-section of the magnet on the first side and the cross-section of the magnet on the second side are both perpendicular to the first direction.
  • the cross-section of the second side magnet can be irregular, so that when the vibration space of the flexible circuit board is reserved, the area should be as large as possible, so that the volume of the second side magnet and the first side magnet is larger.
  • the second side magnets, the first side magnets and the center magnet are arranged in the first direction.
  • the height of the first side magnet is the same as the height of the second side magnet
  • the size of the first side magnet in the second direction is the first width
  • the second direction is perpendicular to the first direction and the center magnet
  • the size of the second side magnet in the second direction is the second width
  • the second width is smaller than the first width.
  • the shapes of the second side magnet and the first side magnet can be a relatively regular rectangular parallelepiped to reduce processing difficulty and cost.
  • the second side magnet includes a first magnetic part and a second magnetic part, and the first magnetic part is located between the second magnetic part and the first side magnet.
  • the second magnetic part is arranged facing the body of the flexible circuit board, the first magnetic part is arranged facing the head end of the first branch and the head end of the second branch of the flexible circuit board, and the first magnetic part can also face the first branch.
  • the part of the connecting section of the node near the head end and the part of the connecting section of the second branch near the head end are arranged.
  • the length of the first magnetic part in the longitudinal direction of the electro-acoustic transducer is shorter than that of the second side magnet of the previous embodiment.
  • the first magnetic part please refer to the second part of the previous embodiment. Side magnet.
  • the height of the second magnetic part is greater than the height of the first magnetic part, and the height of the second magnetic part is less than the height of the first side magnet.
  • the top surface of the second magnetic part may be in contact with the body of the flexible circuit board, so as to make full use of the space under the flexible circuit board.
  • first magnetic part and the second magnetic part may be integrally formed, or an integrated structure may be formed by assembly (for example, bonding).
  • the flexible circuit board includes a body, a first branch and a second branch.
  • the body is fixed to the second surface of the frame, the head of the first branch and the head of the second branch are respectively connected to the two ends of the body, the end of the first branch is fixed to a corner of the voice coil, and the second branch is fixed to the corner of the voice coil. The end is fixed to the other corner of the voice coil.
  • the transducer can compress the length of the second side magnet and increase the length of the first side magnet in its length direction, so that the magnetic induction intensity of the magnetic circuit is greater.
  • the length of the first side magnet may be greater than the length of the second side magnet.
  • the height of the first side magnet is greater than the height of the second side magnet.
  • the thickness direction of the center magnet is parallel to the thickness direction of the electroacoustic transducer.
  • the height of the first side magnet can be greater than the height of the second side magnet to make full use of space, Increasing the magnetic induction intensity of the magnetic circuit makes the sensitivity of the electro-acoustic transducer better.
  • the magnet on the first side is a rectangular parallelepiped
  • the magnet on the second side is a rectangular parallelepiped.
  • the height of the magnet on the first side may be greater than the height of the magnet on the second side.
  • the width of the second side magnet may be greater than the width of the first side magnet.
  • the basin frame further includes a plurality of legs.
  • a plurality of supporting legs are fixed to the second surface of the frame body at intervals.
  • the electro-acoustic transducer also includes a lower pole piece, which is fixedly connected to a plurality of supporting legs and is spaced apart from the frame. The center magnet, the two first side magnets and the two second side magnets are all fixed on the side of the lower pole piece facing the frame.
  • the electro-acoustic transducer is supported between the frame and the lower pole piece through a plurality of legs.
  • the multiple legs can not only support and connect, but also occupy the space between the frame and the lower pole piece.
  • the space is small, so that a large magnetic circuit arrangement space is formed between the frame and the lower pole piece.
  • the magnetic circuit can make full use of this space to arrange the magnets, so that the electro-acoustic transducer has higher magnetic induction intensity and better sensitivity. .
  • the lower pole piece is used as a magnetic conductive part, which can not only enclose the magnetic field, reduce the bad influence of the magnetic field of the electro-acoustic transducer on the surrounding environment, but also can be used as a carrier to fix the center magnet, the two first side magnets and the two The second side magnet makes the relative positional relationship between the multiple magnets stable and reliable, so that the reliability of the electro-acoustic transducer is high.
  • the electroacoustic transducer further includes a center pole piece and a side pole piece.
  • the center pole piece is fixed on the side of the center magnet away from the lower pole piece.
  • the side pole piece is fixed on the inner side of the frame body and is spaced apart from the flexible circuit board.
  • the side pole piece includes a first pole piece part, and the first pole piece part is arranged directly opposite to the first side magnet and the second side magnet.
  • a second gap is formed between the first pole piece part and the center pole piece, and the second gap communicates with the first gap.
  • the voice coil part is located in the second gap.
  • the body of the flexible circuit board and the side pole pieces can be stacked and arranged spaced apart from each other in the thickness direction of the electro-acoustic transducer, and the body and the side pole pieces of the flexible circuit board fixed to the basin frame are formed by the partial structure of the basin frame.
  • a fixing groove is formed on the inner side of the frame, and the fixing groove is arranged around the inner space of the frame.
  • the opening of the fixing groove is located on the inner side surface of the frame body, and the fixing groove is recessed in a direction close to the outer side surface.
  • the connecting frame part of the side pole piece can be clamped into the fixing groove of the frame body.
  • the connecting frame part is partly located in the fixing groove and partly outside the fixing groove.
  • the first and second pole piece parts of the side pole piece are located outside the fixing groove. .
  • the first pole piece part is substantially T-shaped, the first pole piece part includes a first part and a second part, and the second part connects the first part and the connecting frame part.
  • An escape gap is formed on both sides of the second part of the first pole piece part, and the escape gap is located between the first part of the first pole piece part and the connecting frame part.
  • the four corners inside the frame are connected to form a corner gap. The corner gap connects adjacent avoidance gaps.
  • the first part of the first pole piece part is arranged facing the first side magnet
  • the second part of the first pole piece part is arranged facing the second side magnet
  • the connecting frame part of the side pole piece is connected to the first pole piece part.
  • the straight side part of the two parts is arranged directly opposite to the second side magnet.
  • the first part of the first pole piece part and the first side magnet can be fixed by bonding.
  • a gap is formed between the second part of the first pole piece part and the connecting frame part and the second side magnet.
  • a second gap is formed between the first pole piece part and the center pole piece, and the second gap communicates with the first gap.
  • the head end of the first branch of the flexible circuit board is directly opposite to the second part of the first pole piece part of the side pole piece.
  • the head end of the first branch and the second part of the first pole piece part are in the electro-acoustic transducer Spaced from each other in the thickness direction.
  • the connecting section and the end of the first branch are directly opposite to the avoidance gap and the corner gap on the side of the second part of the first pole piece part.
  • the amplitude of the first branch gradually decreases from the end to the head end, and the amplitude of the head end of the first branch is small or does not vibrate, so the first branch can Making full use of the gap of the side pole piece to vibrate, and will not rub against the side pole piece during vibration, which is beneficial to improve the reliability of the electro-acoustic transducer.
  • the head end of the second branch of the flexible circuit board is directly opposite to the second part of the first pole piece part of the side pole piece, and the head end of the second branch and the second part of the first pole piece part are in the thickness direction of the electro-acoustic transducer Spaced on each other.
  • the connecting section and the end of the second branch are directly opposite to the avoidance gap and the corner gap on the other side of the second part of the first pole piece part.
  • the electro-acoustic transducer further includes two third-side magnets, and the two third-side magnets are fixed on the side of the lower pole piece facing the frame, and are arranged symmetrically on the side of the center magnet. On the other two sides, a third gap is formed between the third side magnet and the center magnet.
  • the side pole piece also includes a second pole piece portion, the second pole piece portion is facing the third side magnet, a fourth gap is formed between the second pole piece portion and the center pole piece, the fourth gap is connected to the third gap, and the voice coil portion Located in the fourth gap, partly in the third gap.
  • the third side magnet is spaced apart from the flexible circuit board.
  • both ends of the third side magnet are close to the end of the branch of the flexible circuit board, and the end faces of both ends of the third side magnet are partially recessed to form a avoidance area, the avoidance area is connected to the third gap, and the end of the branch of the flexible circuit board is located in the avoidance area. Area, and form a gap with the wall of the avoidance area.
  • the connecting frame portion of the side pole piece is connected to the straight side portion of the second pole piece portion and is arranged directly opposite to the third side magnet.
  • the third side magnet makes full use of the space between the side pole piece and the lower pole piece to have a larger size in the width direction of the electroacoustic transducer, so that the magnetic induction intensity of the magnetic circuit is higher.
  • the electroacoustic transducer further includes a connecting frame, the connecting frame is located between the voice coil and the sound film, one end of the connecting frame is fixedly connected to the voice coil, and the other end of the connecting frame is fixedly connected to the sound film.
  • the connecting frame isolates the voice coil from the sound film so that the sound film is far away from the voice coil. At the same time, the connecting frame can dissipate heat to the voice coil, thereby reducing the risk of damage to the sound film due to overheating of the voice coil.
  • the voice coil is connected to the sound film through the connecting frame, so the distance between the end of the voice coil far away from the sound film and the sound film is large, so that the voice coil can be fully inserted into the magnetic circuit, and the magnetic field generated by the magnetic circuit effectively acts on the voice coil. , And the distance between the sound film and the magnetic circuit is large, and the vibration space of the sound film is larger, which helps the sound film to achieve large-scale vibration.
  • the cross-sectional shape of the connecting frame is roughly Z-shaped, and the extension track of the connecting frame is a rectangle with rounded corners.
  • the connecting frame includes a main part, an extension part and an inner extension part.
  • the extension part is connected to the bottom surface of the main part and extends to the outside of the main part.
  • the area of the bottom surface of the extension part is larger than the area of the bottom surface of the main part to increase the connection area between the connection frame and other components.
  • the inner extension part is connected to the top surface of the main part and extends to the inner side of the main part.
  • the area of the top surface of the inner extension part is larger than the area of the top surface of this part, so as to increase the connection area between the connection frame and other components.
  • the two end surfaces of the connecting frame (that is, the bottom surface of the outer extension portion and the top surface of the inner extension portion) have a larger area, so that the connecting area of the connecting frame and the external structure is larger, and the connection relationship is more stable.
  • the connecting frame can be integrally formed.
  • the cross-sectional shape of the connecting frame may also be a vertical "one" shape, L shape, inverted L shape, T shape, inverted T shape, " ⁇ " shape, etc.
  • an embodiment of the present application also provides a speaker module.
  • the speaker module includes the upper shell of the module and the electroacoustic transducer of any one of the above.
  • the electroacoustic transducer is used as the speaker core of the speaker module.
  • the electroacoustic transducer is fixedly connected to the upper shell of the module, and a front sound cavity is formed between the sound film and the upper shell of the module.
  • the upper shell of the module is provided with a sound outlet, and the sound outlet communicates with the front sound cavity and the outside of the speaker module.
  • the volume of the speaker module is larger, so as to have a wider application range.
  • the speaker module further includes a lower module shell, the lower module shell is fixed to the upper module shell, the electroacoustic transducer is located inside the lower module shell and the upper module shell, and the sound membrane The side facing away from the front sound cavity forms a rear sound cavity, and the lower shell of the module is provided with a leakage hole, which connects the rear sound cavity and the outside of the speaker module.
  • the speaker module is covered by the lower module shell and the upper module shell to form a modular structure.
  • the lower module shell and the upper module shell can fully protect the electro-acoustic transducer located inside it, as well as It is beneficial to simplify the assembly structure of the speaker module and other components.
  • the speaker module also includes a buffer, which is fixed between the lower shell of the module and the electroacoustic transducer, so that the electroacoustic transducer and the upper shell of the module are firmly connected to avoid shaking of the electroacoustic transducer The risk of this makes the speaker module more reliable.
  • an embodiment of the present application also provides an electronic device.
  • the electronic device includes a housing and any one of the above-mentioned speaker modules.
  • the speaker module is housed in the housing, and the housing is provided with a speaker hole, which communicates the sound hole with the outside of the electronic device.
  • the speaker module can emit a larger volume, so that the sound playback performance of the electronic device is better, which helps to improve the user experience.
  • an embodiment of the present application also provides an electronic device.
  • the electronic equipment includes a casing, a display module and a receiver.
  • the display module includes a cover plate and a display panel.
  • the cover plate is fixed to the casing, and the display panel is fixed to the inner surface of the cover plate facing the casing.
  • the receiver is housed in the housing, and the receiver is any one of the electroacoustic transducers mentioned above.
  • the cover plate is provided with a receiving hole, or a receiving hole is formed between the edge of the cover plate and the housing, or the housing is provided with a receiving hole. The sound from the receiver is transmitted to the outside of the electronic device through the voice hole.
  • the earpiece using the electro-acoustic transducer can emit a larger volume, so that the sound playback performance of the electronic device is better. Help improve the user experience.
  • FIG. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of the structure of the speaker module of the electronic device shown in FIG. 1;
  • Fig. 3 is an exploded schematic diagram of the speaker module shown in Fig. 2;
  • Fig. 4 is a schematic structural diagram of the speaker module shown in Fig. 3 from another angle;
  • Fig. 5 is a schematic structural diagram of the speaker module shown in Fig. 2 taken along A-A;
  • Fig. 6 is a schematic structural diagram of the speaker module shown in Fig. 2 taken along B-B;
  • Fig. 7 is a schematic structural diagram of the speaker module shown in Fig. 2 taken along A-A in another embodiment
  • FIG. 8 is a schematic diagram of a part of the structure of the speaker module shown in FIG. 2;
  • Fig. 9 is a structural diagram of the electroacoustic transducer shown in Fig. 3.
  • Fig. 10 is a partially exploded schematic diagram of the electro-acoustic transducer shown in Fig. 9;
  • Fig. 11 is a schematic structural view of the basin frame shown in Fig. 10 cut along C-C;
  • Fig. 12 is an exploded schematic view of the vibration assembly shown in Fig. 11;
  • Fig. 13 is an exploded schematic diagram of the sound film shown in Fig. 12;
  • Fig. 14 is a schematic structural view of the sound film shown in Fig. 12 cut along D-D;
  • FIG. 15 is a schematic structural diagram of the sound film of FIG. 12 in another embodiment
  • Fig. 16 is a schematic structural view of the sound film shown in Fig. 15 taken along E-E;
  • Fig. 17 is a schematic structural view of the connecting frame shown in Fig. 12 taken along F-F;
  • Fig. 18 is a schematic structural view of the vibration assembly shown in Fig. 10 taken along G-G;
  • FIG. 19 is a schematic view of the structure of the vibrating assembly shown in FIG. 10 at another angle;
  • FIG. 20 is a schematic diagram of the assembly structure of the flexible circuit board and the voice coil of the vibrating assembly shown in FIG. 10;
  • 21 is a schematic diagram of the assembly structure of the auxiliary diaphragm, flexible circuit board and voice coil of the vibration component shown in FIG. 10;
  • Fig. 22 is an exploded schematic diagram of the magnetic circuit assembly shown in Fig. 10;
  • FIG. 23 is a schematic diagram of a part of the structure of the magnetic circuit assembly shown in FIG. 10;
  • Fig. 24 is a schematic structural view of the magnetic circuit assembly shown in Fig. 10 taken along H-H;
  • Fig. 25 is a schematic structural view of the magnetic circuit assembly shown in Fig. 10 taken along I-I;
  • Fig. 26 is a schematic structural diagram of the electroacoustic transducer shown in Fig. 9 taken along J-J;
  • Fig. 27 is a schematic structural diagram of the electroacoustic transducer shown in Fig. 9 taken along K-K;
  • FIG. 28 is a schematic diagram of the assembled structure of the side pole piece and the basin frame of the electroacoustic transducer shown in FIG. 9;
  • FIG. 29 is a schematic diagram of the magnetic circuit assembly and voice coil shown in FIG. 26;
  • FIG. 30 is a schematic diagram of the magnetic circuit assembly and voice coil shown in FIG. 27;
  • Fig. 31 is a partial structural diagram of the electro-acoustic transducer shown in Fig. 9;
  • FIG. 32 is a schematic diagram of another part of the structure of the electroacoustic transducer shown in FIG. 9;
  • Fig. 33 is a structural schematic diagram of the electro-acoustic transducer shown in Fig. 9 taken along L-L;
  • FIG. 34 is a schematic diagram of the structure of the first side magnet and the second side magnet shown in FIG. 32;
  • 35 is a schematic diagram of the structure of the first side magnet and the second side magnet of FIG. 32 in another embodiment
  • FIG. 36 is a schematic diagram of the positional relationship between the first side magnet and the second side magnet and the flexible circuit board shown in FIG. 35;
  • FIG. 37 is a schematic diagram of the structure of the first side magnet and the second side magnet of FIG. 32 in another embodiment
  • FIG. 38 is a schematic diagram of the positional relationship between the first side magnet and the second side magnet and the flexible circuit board shown in FIG. 37;
  • FIG. 39 is a schematic diagram of the structure of the first side magnet and the second side magnet of FIG. 32 in another embodiment
  • FIG. 40 is a schematic diagram of the positional relationship between the first side magnet and the second side magnet and the flexible circuit board shown in FIG. 39;
  • 41 is a schematic diagram of the structure of the first side magnet and the second side magnet of FIG. 32 in another embodiment
  • FIG. 42 is a schematic diagram of the structure of the first side magnet and the second side magnet of FIG. 32 in another embodiment
  • FIG. 43 is a schematic diagram of the positional relationship between the first side magnet and the second side magnet and the flexible circuit board shown in FIG. 42;
  • FIG. 44 is a schematic diagram of the structure of the flexible circuit board, the first side magnet, and the second side magnet of FIG. 32 in another embodiment
  • FIG. 45 is a schematic diagram of the structure of the first side magnet and the second side magnet shown in FIG. 44.
  • the embodiment of the present application provides an electroacoustic transducer, which is used to convert an electric signal into a sound signal.
  • the electro-acoustic transducer optimizes the structure of the magnetic circuit component and the flexible circuit board to ensure the driving force of the magnetic circuit component, so that the sensitivity of the electro-acoustic transducer is better.
  • the embodiment of the present application also provides an electronic device including the electro-acoustic transducer.
  • the electronic device can be a product with a sound playback function such as a mobile phone, a tablet computer, a notebook computer, a wearable device, and a walkman.
  • the wearable device may be a smart bracelet, smart watch, smart head display, smart glasses, etc.
  • the electro-acoustic transducer can be used as a speaker core of a speaker module (also referred to as a horn) to be applied to an electronic device, and can also be used as a receiver (also referred to as an earpiece) to be applied to an electronic device.
  • a speaker module also referred to as a horn
  • a receiver also referred to as an earpiece
  • FIG. 1 is a schematic structural diagram of an electronic device 1000 according to an embodiment of the present application.
  • the electronic device 1000 shown in FIG. 1 is described by taking a mobile phone as an example.
  • the electronic device 1000 includes a housing 100, a display module 200, a receiver 300, a camera module 500, a speaker module 600, a first circuit board 700, a second circuit board 800, and a battery 900.
  • the housing 100 includes a frame 1001 and a back cover 1002, and the frame 1001 is connected to the periphery of the back cover 1002.
  • the frame 1001 and the back cover 1002 may be an integral structure, or may be assembled to form an integral structure.
  • the housing 100 is provided with a speaker hole 1003.
  • the number of speaker holes 1003 can be one or more. Exemplarily, the number of the speaker holes 1003 is multiple, and the multiple speaker holes 1003 are provided on the frame 1001.
  • the speaker hole 1003 connects the inside of the electronic device 1000 with the outside of the electronic device 1000.
  • the display module 200 includes a cover 2001 and a display panel 2002.
  • the cover plate 2001 is fixed to the housing 100, for example, the cover plate 2001 is fixed to the side of the frame 1001 away from the rear cover 1002.
  • the display panel 2002 is fixed on the inner surface of the cover plate 2001 facing the rear cover 1002.
  • the cover 2001 is used to protect the display panel 2002, the display panel 2002 is used to display images, and the display panel 2002 can also integrate a touch function.
  • the cover plate 2001 is provided with a light transmitting part 2003 and a receiving hole 2004.
  • the light-transmitting portion 2003 allows light to pass through, for example, the ink layer of the cover plate 2001 is hollowed out in the light-transmitting portion 2003.
  • the receiving hole 2004 is a through hole penetrating the cover plate 2001.
  • the projection of the display panel 2002 on the cover 2001 is staggered from the light-transmitting part 2003 and the receiving hole 2004.
  • a receiving hole is formed between the edge of the cover plate 2001 and the housing 100.
  • the cover 2001 is located at the edge of the top of the electronic device 1000 and the frame 1001 of the housing 100 is located at the top of the electronic device 1000 to form a receiving hole.
  • the housing 100 is provided with a receiving hole.
  • the frame 1001 of the housing 100 is located at the top of the electronic device 1000 to form a receiving hole. This application does not strictly limit the specific formation structure and position of the receiving hole.
  • the receiver 300 is housed in the inside of the housing 100.
  • the receiver 300 is located between the display module 200 and the back cover 1002.
  • the sound emitted by the receiver 300 is transmitted to the outside of the electronic device 1000 through the speech hole 2004, so as to realize the sound playback function of the electronic device 1000.
  • the receiver 300 may use the electro-acoustic transducer described in the following embodiments. In other embodiments, the receiver 300 may also adopt electro-acoustic transducers with other structures.
  • the camera module 500 is housed in the housing 100.
  • the camera module 500 is located between the display module 200 and the back cover 1002.
  • the camera module 500 collects light through the light-transmitting part 2003 of the cover 2001 for shooting.
  • the electronic device 1000 may further include another camera module housed in the housing 100, the back cover 1002 may be provided with a shooting through hole, and the other camera module may collect light through the shooting through hole for shooting.
  • the speaker module 600 is contained in the housing 100.
  • the speaker module 600 is located between the display module 200 and the back cover 1002.
  • the sound emitted by the speaker module 600 can be transmitted to the outside of the electronic device 1000 through the speaker hole 1003, so as to realize the sound playback function of the electronic device 1000.
  • the speaker module 600 includes a speaker core, and the speaker core may use the electroacoustic transducer described in the following embodiments. In other embodiments, the speaker core may also adopt electroacoustic transducers with other structures.
  • the first circuit board 700, the second circuit board 800 and the battery 900 are all contained in the housing 100.
  • the first circuit board 700 and the second circuit board 800 are respectively located on both sides of the battery 900.
  • the first circuit board 700 is located on the top of the electronic device 1000
  • the battery 900 is located in the middle of the electronic device 1000
  • the second circuit board 800 is located on the electronic device 1000. bottom of.
  • Multiple devices may be fixed on the first circuit board 700 and the second circuit board 800.
  • Devices include but are not limited to processors, memories, etc.
  • the functional modules of the electronic device 1000 such as the display module 200, the camera module 500, the speaker module 600, and the receiver 300 are coupled to the processor. This application does not strictly limit the specific devices fixed on the first circuit board 700 and the second circuit board 800.
  • the first circuit board 700 and the second circuit board 800 may be connected by wires such as a flexible circuit board, a coaxial cable, etc., to achieve electrical connection between each other.
  • the battery 900 is used to power the electronic device 1000.
  • the electronic device 1000 can also omit the first circuit board 700 or the second circuit board 800, and fix the devices that need to be fixed on the circuit board on the reserved circuit board.
  • FIG. 2 is a schematic structural diagram of the speaker module 600 of the electronic device 1000 shown in FIG. 1.
  • the speaker module 600 includes an electroacoustic transducer 10, an upper module housing 20, a lower module housing 30 and a circuit board 40.
  • the upper module housing 20 and the lower module housing 30 are fixed to each other to form a sound box.
  • the electroacoustic transducer 10 is located inside the sound box.
  • One end of the circuit board 40 is located inside the sound box to connect to the electroacoustic transducer 10.
  • the other end of the circuit board 40 is located outside the sound box to electrically connect the electro-acoustic transducer 10 and the external components of the speaker module 600.
  • one end of the circuit board 40 located outside the sound box may be fixed and electrically connected to the second circuit board 800.
  • the upper shell 20 of the module is provided with a sound outlet 201, and the sound outlet 201 connects the inside of the sound box with the outside of the sound box.
  • the sound emitted by the electroacoustic transducer 10 can be transmitted to the outside of the sound box through the sound hole 201.
  • the speaker hole 1003 of the housing 100 connects the sound hole 201 of the electro-acoustic transducer 10 with the outside of the electronic device 1000, and the sound emitted by the electro-acoustic transducer 10 can pass through the sound hole 201 And the speaker hole 1003 is transmitted to the outside of the electronic device 1000.
  • FIG. 3 is an exploded schematic diagram of the speaker module 600 shown in FIG. 2, and FIG. 4 is a schematic structural diagram of the speaker module 600 shown in FIG. 3 from another angle.
  • the upper housing 20 of the module includes a top surface 202 and a bottom surface 203 disposed opposite to each other, and a peripheral side surface 204 connected between the top surface 202 and the bottom surface 203.
  • the opening of the sound hole 201 is provided on the peripheral side surface 204 of the upper shell 20 of the module.
  • the upper module shell 20 also has a positioning groove 205, a first notch 206 and a receiving groove 207.
  • the opening of the positioning groove 205 is provided on the bottom surface 203 of the upper module casing 20.
  • the first notch 206 penetrates from the side wall of the positioning groove 205 to the peripheral side surface 204 of the upper module casing 20 and extends to the bottom surface 203 of the upper module casing 20.
  • the opening of the receiving groove 207 is provided on the bottom wall 2051 of the positioning groove 205.
  • the bottom wall 2071 of the receiving groove 207 is protruded with a first protrusion 2072 and a second protrusion 2073.
  • the first protrusions 2072 may be arranged approximately in a U shape to form a surrounding area 2076 which is connected to the sound hole 201.
  • the side wall 2074 of the receiving groove 207 is protrudingly provided with a third protrusion 2075, and the third protrusion 2075 is connected to two ends of the first protrusion 2072.
  • the second protrusion 2073 may include a continuous complete ridge, or may include a plurality of broken ridges.
  • One end of the second protrusion 2073 is disposed close to the first protrusion 2072, and the other end is disposed close to the first notch 206. It is understandable that the orientation terms such as “top” and “bottom” used in the speaker module 600 of the embodiment of the present application are mainly described based on the display orientation of the speaker module 600 in FIG. 3, and do not form a reference to the speaker module. 600 is limited to the position in the actual application scenario.
  • the electroacoustic transducer 10 includes a basin frame 1 and a sound film 2 fixed to the basin frame 1.
  • the electroacoustic transducer 10 generates sound through the vibration of the sound membrane 2.
  • the circuit board 40 may be a flexible circuit board. One end of the circuit board 40 includes two branches, and the ends of the two branches can form a connecting end.
  • the lower module housing 30 includes a substrate 301 and a limiting protrusion 302.
  • the substrate 301 includes a top surface 303 and a bottom surface 304 disposed opposite to each other, and a peripheral side surface 305 connected between the top surface 303 and the bottom surface 304.
  • the limiting protrusion 302 is fixed to the top surface 303 of the substrate 301 and is arranged around the periphery of the top surface 303 of the substrate 301.
  • a second notch 3021 may be provided on the limiting protrusion 302. The second notch 3021 is recessed from the top surface 3022 of the limiting protrusion 302 toward the top surface 303 of the substrate 301, and is connected to the inner space of the limiting protrusion 302 and Outside space.
  • the second notch 3021 and the first notch 206 directly face each other to form a larger-diameter notch.
  • the second notch 3021 can also be omitted from the lower module shell 30.
  • the base plate 301 is provided with a communication groove 3011 and a leakage hole 3012.
  • the opening of the communication groove 3011 is provided on the bottom surface 304 of the substrate 301 and extends to the peripheral side surface 305 of the substrate 301.
  • the openings at both ends of the leakage hole 3012 are respectively provided on the bottom wall 3013 of the communication groove 3011 and the top surface 303 of the substrate 301.
  • the leakage hole 3012 communicates the top space of the substrate 301 with the communication groove 3011, the bottom space of the substrate 301, and the substrate 301 ⁇ circumside space.
  • the leakage hole 3012 of the substrate 301 penetrates from the bottom surface 304 of the substrate 301 to the top surface 303 of the substrate 301, and the substrate 301 is not provided with the communication groove 3011.
  • FIG. 5 is a schematic structural diagram of the speaker module 600 shown in FIG. 2 taken along A-A
  • FIG. 6 is a schematic structural diagram of the speaker module 600 shown in FIG. 2 taken along B-B.
  • cut along AA refers to cut along the plane where the arrows at both ends of line AA and AA are located
  • cut along BB refers to where the arrows at both ends of line BB and BB are located. Plane cut.
  • the lower module housing 30 covers the upper module housing 20, the top surface 303 of the substrate 301 of the lower module housing 30 contacts the bottom surface 203 of the upper module housing 20, and the limiting protrusion 302 of the lower module housing 30 is clamped into the mold
  • the positioning groove 205 of the upper housing 20 is assembled, and a concave-convex matching structure is formed between the limiting protrusion 302 and the positioning groove 205, so that the lower module housing 30 and the upper module housing 20 are relatively fixed.
  • the lower module shell 30 and the upper module shell 20 jointly enclose a sound cavity space 6001.
  • the electroacoustic transducer 10 is housed in the sound cavity space 6001. That is, the electroacoustic transducer 10 is located inside the lower module housing 30 and the upper module housing 20.
  • the upper shell 20 of the module is fixedly connected to the basin frame 1 of the electroacoustic transducer 10.
  • the basin frame 1 is partially clamped into the surrounding area 2076 (as shown in FIG. 4 ), and the first protrusion 2072 and the third protrusion 2075 continuously abut the circumference of the basin frame 1.
  • the sound film 2 of the electroacoustic transducer 10 is located in the surrounding area 2076.
  • the sound film 2 divides the sound cavity space 6001 into a front sound cavity 6002 and a rear sound cavity 6003.
  • a front sound cavity 6002 is formed between the upper shell 20 of the module and the sound film 2. That is, the bottom wall 2071 of the accommodating groove 207 of the upper module shell 20 encloses the first protrusion 2072, the sound film 2, and the third protrusion 2075 together to form a front sound cavity 6002.
  • the sound outlet 201 communicates with the front sound cavity 6002 and the outside of the speaker module 600.
  • the rear sound cavity 6003 is located on the side of the sound membrane 2 away from the front sound cavity 6002.
  • the rear sound cavity 6003 is connected to the outside of the speaker module 600 through the leakage hole 3012 and the communicating groove 3011.
  • FIG. 7 is a structural diagram of the speaker module 600 shown in FIG. 2 taken along A-A in another embodiment.
  • the speaker module 600 may further include a buffer 50.
  • the buffer member 50 is fixed on the top surface 303 of the base plate 301 of the lower module housing 30, and the buffer member 50 is located inside the limiting protrusion 302.
  • the side of the buffer 50 away from the base plate 301 resists the electro-acoustic transducer 10, so that the electro-acoustic transducer 10 is firmly connected to the upper housing 20 of the module, and the risk of shaking of the electro-acoustic transducer 10 is avoided, so that the speaker module Group 600 is more reliable.
  • FIG. 8 is a partial structural diagram of the speaker module 600 shown in FIG. 2.
  • One end of the circuit board 40 is located inside the upper module casing 20, and the other end extends to the outside of the upper module casing 20 through the first gap 206.
  • the part of the circuit board 40 located inside the upper module housing 20 is laid on the second protrusion 2073.
  • the part of the circuit board 40 located inside the upper module housing 20 is fixed (for example, glued) to the second protrusion 2073.
  • the circuit board 40 is stably fixed to the upper housing 20 of the module, which can reduce the risk of damage due to shaking.
  • the ends of the two branches of the circuit board 40 are respectively fixed to two corners of the electroacoustic transducer 10 to electrically connect the electroacoustic transducer 10.
  • the structure and shape of the upper module shell 20, the lower module shell 30, and the circuit board 40 of the speaker module 600 can also be designed into other solutions according to their actual requirements (such as installation environment requirements, usage scenario requirements, etc.) .
  • FIG. 9 is a structural diagram of the electroacoustic transducer 10 shown in FIG. 3, and FIG. 10 is a partial exploded schematic diagram of the electroacoustic transducer 10 shown in FIG. 9.
  • the X direction is the length direction of the electroacoustic transducer 10
  • the Y direction is the width direction of the electroacoustic transducer 10
  • the Z direction is the thickness direction of the electroacoustic transducer 10.
  • orientation terms such as “top” and “bottom” used in the electro-acoustic transducer 10 of the embodiment of the present application are mainly described based on the display orientation of the electro-acoustic transducer 10 in FIG. 9 and do not form The orientation of the electroacoustic transducer 10 in the actual application scenario is limited.
  • the multiple components of the electro-acoustic transducer 10 are symmetrically arranged.
  • the symmetrical arrangement of the two components means that the two components are in an axisymmetric relationship with respect to a certain reference plane, which allows due to manufacturing tolerances, assembly tolerances, etc. The slight deviation produced.
  • some components may be symmetrical with respect to the first reference plane, and some components may be symmetrical with respect to the second reference plane, and the second reference plane intersects with the first reference plane.
  • the first reference plane may pass through the KK line and be parallel to the YZ plane.
  • the YZ plane is the plane where the width direction Y of the electroacoustic transducer 10 and the thickness direction Z of the electroacoustic transducer 10 are located.
  • the second reference plane may pass through the JJ line and be parallel to the XZ plane, which is the plane where the length direction X of the electroacoustic transducer 10 and the thickness direction Z of the electroacoustic transducer 10 are located.
  • the electroacoustic transducer 10 includes a support assembly 10a, a vibration assembly 10b, and a magnetic circuit assembly 10c.
  • the supporting assembly 10a includes the aforementioned basin frame 1.
  • the vibration assembly 10b and the magnetic circuit assembly 10c are installed on the basin frame 1.
  • the magnetic circuit assembly 10c is fixed relative to the basin frame 1, and the magnetic circuit assembly 10c is used to provide a driving magnetic field for the vibration assembly 10b.
  • FIG. 11 is a structural diagram of the basin frame 1 shown in FIG. 10 cut along the C-C.
  • the basin frame 1 includes a frame body 11 and a plurality of legs 12.
  • the frame body 11 is substantially a rectangular frame.
  • the frame 11 includes a first surface 111 and a second surface 112 opposite to each other, and a plurality of legs 12 are fixed to the second surface 112 at intervals.
  • two components are spaced or spaced apart from each other, which means that there is a gap between the two components.
  • the number of the plurality of legs 12 may be four, and they are fixed to the two sides of the frame 11 symmetrically two by one.
  • the plurality of legs 12 may be symmetrical with respect to the first reference plane, or may be symmetrical with respect to the second reference plane.
  • the frame 11 further includes an inner side surface 113 and an outer side surface 114 disposed opposite to each other, and the inner side surface 113 and the outer side surface 114 are connected between the first surface 111 and the second surface 112.
  • the inner side surface 113 is arranged obliquely with respect to the outer side surface 114, and the distance between the inner side surface 113 and the outer side surface 114 decreases in a direction close to the first surface 111, so that the inner space of the frame 11 can be formed into a shape with a narrow lower surface and a wide upper surface.
  • a fixing groove 115 is formed on the inner side of the frame 11, and the fixing groove 115 is arranged around the inner space of the frame 11. The opening of the fixing groove 115 is located on the inner side surface 113 of the frame 11, and the fixing groove 115 is recessed toward the outer side surface 114.
  • the basin frame 1 further includes two limiting blocks 13, and the two limiting blocks 13 are symmetrically fixed on the inner side of the two sides of the frame body 11.
  • the two limiting blocks 13 are symmetrical with respect to the second reference plane.
  • the limit block 13 includes a limit bar 131 and at least one limit pin 132.
  • the limiting strip 131 is fixed to the inner side surface 113 of the frame 11, and the bottom surface of the limiting strip 131 and the side wall of the fixing groove 115 are coplanar.
  • At least one limiting foot 132 is fixed on the bottom surface of the limiting bar 131 and extends into the fixing slot 115.
  • the limiting strip 131 includes a side surface connecting the bottom surface of the fixing groove 115 and the side wall of the fixing groove 115, and the side surface of the limiting strip 131 is inclined with respect to the inner side surface 113 of the frame 11.
  • the basin frame 1 is an integrally formed structure.
  • each part of the structure of the basin frame 1 may also be assembled to form an integrated structure (for example, bonding, clamping).
  • the basin frame 1 of the electro-acoustic transducer 10 is used to fix and support other parts of the electro-acoustic transducer 10. Under the condition that this requirement is met, the basin frame 1 can also have other design shapes, and is not limited to This embodiment.
  • FIG. 12 is an exploded schematic diagram of the vibration assembly 10 b shown in FIG. 11.
  • the vibration component 10b of the electroacoustic transducer 10 includes a sound diaphragm 2, a connection frame 3, a voice coil 4, two flexible circuit boards 5 and four auxiliary diaphragms 6.
  • the voice coil 4 is a rectangle with rounded corners. That is, the voice coil 4 includes four straight sides 41 and four rounded corners 42, and a rounded corner 42 is connected between two adjacent straight sides 41.
  • the shape of the sound membrane 2, the connecting frame 3, the two flexible circuit boards 5, and the four auxiliary diaphragms 6 are designed according to the shape of the voice coil 4.
  • the present application does not strictly limit the length relationship between the two adjacent straight sides 41 of the voice coil 4, and the length of one straight side 41 may be greater than, equal to, or less than the length of the other adjacent straight side 41.
  • the voice coil 4 is inserted into the magnetic circuit assembly 10c, and the magnetic circuit assembly 10c provides a magnetic field that drives the voice coil 4 to vibrate. When the voice coil 4 is energized, the voice coil 4 drives other parts of the vibration assembly 10b to vibrate.
  • the voice coil 4 may also be rectangular, and the description of the rounded corners 42 of the voice coil 4 below corresponds to the four corners of the voice coil 4.
  • the voice coil 4 may also have other shapes, and the specific shape of the voice coil 4 is not strictly limited in this application.
  • FIG. 13 is an exploded schematic view of the sound membrane 2 shown in FIG. 12, and FIG. 14 is a structural schematic view of the sound membrane 2 shown in FIG. 12 cut along D-D.
  • the sound diaphragm 2 includes a diaphragm 21 and a dome 22.
  • the dome 22 has a substantially rectangular plate shape.
  • the dome 22 includes a top surface 221 and a bottom surface 222 opposite to each other, and the peripheral area of the top surface 221 of the dome 22 is recessed to form a limiting groove 223.
  • the diaphragm 21 has a substantially rectangular ring shape.
  • the diaphragm 21 includes a first fixing portion 211, a vibrating portion 212 and a second fixing portion 213 connected in sequence.
  • the first fixing portion 211 is located inside the vibrating portion 212
  • the second fixing portion 213 is located outside the vibrating portion 212.
  • the first fixing portion 211 of the diaphragm 21 is partially received in the limiting groove 223 of the dome 22 and is fixed to the dome 22.
  • the bottom surface 2112 of the first fixing portion 211 of the diaphragm 21 contacts the bottom wall 2231 of the limiting groove 223 of the dome 22.
  • the top surface 2111 of the first fixing portion 211 of the diaphragm 21 is flush with the top surface 221 of the dome 22.
  • the cross-sectional shape of the vibrating portion 212 of the diaphragm 21 is arc-shaped or approximately arc-shaped, and the extension track of the vibrating portion 212 is a rectangle with rounded corners.
  • the vibrating portion 212 of the diaphragm 21 is recessed, that is, the vibrating portion 212 is recessed in a direction away from the top surface 2111 of the first fixing portion 211 and the top surface 2131 of the second fixing portion 213 of the diaphragm 21.
  • the vibrating portion 212 of the diaphragm 21 can be deformed when receiving an external force, so that the first fixing portion 211 and the second fixing portion 213 move relative to each other, and the dome 22 and the second fixing portion 213 move relative to each other.
  • the electroacoustic transducer 10 can save its upper space, and it is easy to restore the original shape after the diaphragm 21 is deformed under the influence of water pressure or air pressure. .
  • FIG. 15 is a schematic structural diagram of the sound membrane 2 of FIG. 12 in another embodiment
  • FIG. 16 is a structural schematic diagram of the sound membrane 2 shown in FIG. 15 cut along E-E.
  • the sound diaphragm 2 includes a diaphragm 21 and a dome 22.
  • the dome 22 has a substantially rectangular plate shape.
  • the dome 22 includes a top surface 221 and a bottom surface 222 opposite to each other, and the bottom surface 222 of the dome 22 is concavely formed with a limiting groove 223 on the peripheral area.
  • the diaphragm 21 has a substantially rectangular ring shape.
  • the diaphragm 21 includes a first fixing portion 211, a vibrating portion 212 and a second fixing portion 213 connected in sequence.
  • the first fixing portion 211 is located inside the vibrating portion 212
  • the second fixing portion 213 is located outside the vibrating portion 212.
  • the first fixing portion 211 of the diaphragm 21 is partially received in the limiting groove 223 of the dome 22 and is fixed to the dome 22.
  • the top surface 2111 of the first fixing portion 211 of the diaphragm 21 contacts the bottom wall 2231 of the limiting groove 223 of the dome 22.
  • the bottom surface 2112 of the first fixing portion 211 of the diaphragm 21 is flush with the bottom surface 222 of the dome 22.
  • the cross-sectional shape of the vibrating portion 212 of the diaphragm 21 is arc-shaped or approximately arc-shaped, and the extension track of the vibrating portion 212 is a rectangle with rounded corners.
  • the vibrating portion 212 of the diaphragm 21 is convexly disposed, that is, the vibrating portion 212 is convex in a direction away from the bottom surface 2112 of the first fixing portion 211 and the bottom surface 2132 of the second fixing portion 213 of the diaphragm 21.
  • the vibrating portion 212 of the diaphragm 21 can be deformed when receiving an external force, so that the first fixing portion 211 and the second fixing portion 213 move relative to each other, and the dome 22 and the second fixing portion 213 move relative to each other.
  • the vibrating portion 212 of the diaphragm 21 is arranged convexly, the space under the diaphragm 21 is released, and the magnetic circuit assembly 10c under the diaphragm 21 is allowed to have a larger height dimension, thereby increasing the electroacoustic
  • the magnetic induction intensity of the transducer 10 improves the sensitivity of the electroacoustic transducer 10.
  • FIG. 17 is a schematic structural view of the connecting frame 3 shown in FIG. 12 taken along F-F.
  • the cross-sectional shape of the connecting frame 3 is roughly Z-shaped, and the extension track of the connecting frame 3 is a rectangle with rounded corners.
  • the connecting frame 3 includes a main portion 31, an extension portion 32 and an extension portion 33.
  • the extension portion 32 is connected to the bottom surface 311 of the main portion 31 and extends to the outside of the main portion 31.
  • the area of the bottom surface 321 of the extension portion 32 is larger than the area of the bottom surface 311 of the main portion 31 to increase the connection area between the connection frame 3 and other components.
  • the inner extension portion 33 is connected to the top surface 312 of the main portion 31 and extends to the inner side of the main portion 31.
  • the area of the top surface 331 of the inner extension portion 33 is larger than the area of the top surface 312 of the main portion 31 to increase the connection area between the connection frame 3 and other components.
  • the two end surfaces of the connecting frame 3 (that is, the bottom surface 321 of the extension portion 32 and the top surface 331 of the extension portion 33) have a larger area, so that the connection area between the connecting frame 3 and the external structure is larger. More stable.
  • the connecting frame 3 can be integrally formed.
  • the cross-sectional shape of the connecting frame 3 may also be a vertical "one" shape, L shape, inverted L shape, T shape, inverted T shape, " ⁇ " shape, etc. This application does not strictly limit the cross-sectional shape of the connecting frame 3.
  • the flexible circuit board 5 includes a main body 51, a first branch 52 and a second branch 53.
  • the main body 51 includes a middle part 511 and two end parts 512 respectively connected to two sides of the middle part 511.
  • the first branch 52 includes a head end 521, an end 522, and a connecting section 523 connected between the head end 521 and the end 522.
  • the second branch 53 includes a head end 531, an end 532, and a connecting section 533 connected between the head end 531 and the end 532.
  • the head end 521 of the first branch 52 and the head end 531 of the second branch 53 are both connected to the middle part 511 of the body 51.
  • the head end 521 of the first branch section 52 is connected to the head end 531 of the second branch section 53, and the two are connected to the middle part 511 of the main body 51 after being spliced.
  • the head end 521 of the first branch section 52 and the head end 531 of the second branch section 53 are respectively connected to different positions of the middle part 511 of the body 51, and a gap is formed between the two.
  • the end 522 of the first branch 52 and the end 532 of the second branch 53 are spaced apart from each other and spaced apart from the body 51.
  • the end 522 of the first branch 52 and the end 532 of the second branch 53 are movable ends and can be opposed to each other.
  • the body 51 is active.
  • the connecting section 523 of the first branch 52 can be driven to move relative to the main body 51.
  • the connecting section 533 of the second branch 53 can be driven to move relative to the main body 51.
  • the four auxiliary diaphragms 6 have the same structure.
  • the auxiliary diaphragm 6 is roughly fan-shaped.
  • the auxiliary diaphragm 6 includes a first fixing part 61, a vibrating part 62 and a second fixing part 63 connected in sequence, the first fixing part 61 is located inside the vibrating part 62, and the second fixing part 63 is located outside the vibrating part 62.
  • the cross-sectional shape of the vibrating portion 62 of the auxiliary diaphragm 6 is arc-shaped or approximately arc-shaped, and the extension track of the vibrating portion 212 is arc-shaped.
  • the vibrating portion 62 of the auxiliary diaphragm 6 is recessed, that is, the vibrating portion 62 is recessed in a direction away from the top surface 611 of the first fixing portion 61 and the top surface 631 of the second fixing portion 63.
  • the first fixing portion 61 of the auxiliary diaphragm 6 has a fan shape.
  • a notch 632 is formed on the side of the second fixing portion 63 of the auxiliary diaphragm 6 away from the first fixing portion 61.
  • the vibration portion 62 of the auxiliary diaphragm 6 can be deformed when receiving an external force, so that the first fixing portion 61 and the second fixing portion 63 move relative to each other.
  • FIG. 18 is a schematic structural diagram of the vibrating assembly 10b shown in FIG. 10 taken along G-G
  • FIG. 19 is a structural schematic diagram of the vibrating assembly 10b shown in FIG. 10 at another angle.
  • the voice coil 4 is fixedly connected to the sound film 2.
  • the voice coil 4 is indirectly connected to the sound membrane 2 through the connection frame 3.
  • the connecting frame 3 is located between the voice coil 4 and the sound film 2, and one end of the connecting frame 3 is fixed to the voice coil 4, and the other end of the connecting frame 3 is fixed to the sound film 2.
  • the top surface 331 of the inner extension portion 33 of the connecting frame 3 contacts the bottom surface 222 of the dome 22 of the sound film 2, and the two can be fixed to each other by bonding.
  • the bottom surface 321 of the extension portion 32 of the connecting frame 3 contacts the top surface 43 of the voice coil 4, and the two can be fixed to each other by bonding.
  • the area of the bottom surface 321 of the extension portion 32 of the connecting frame 3 may be smaller than the area of the top surface 43 of the voice coil 4.
  • the connecting frame 3 isolates the voice coil 4 from the sound film 2 so that the sound film 2 is far away from the voice coil 4. At the same time, the connecting frame 3 can dissipate heat to the voice coil 4, thereby reducing the overheating of the voice coil 4 Risk of damage to the sound membrane 2.
  • the connecting frame 3 is omitted from the electroacoustic transducer 10, and the voice coil 4 is directly connected to the sound membrane 2, so as to simplify the structure of the electroacoustic transducer 10.
  • the two flexible circuit boards 5 are arranged symmetrically at a distance from each other.
  • the two flexible circuit boards 5 may be symmetrical with respect to the first reference plane.
  • Two flexible circuit boards 5 are respectively located outside the two sides of the voice coil 4.
  • the two branch ends (522, 532) of each flexible circuit board 5 are fixed to the two rounded corners 42 of the voice coil 4, respectively.
  • the end 522 of the first branch 52 is fixed to one rounded corner 42 of the voice coil 4
  • the end 532 of the second branch 53 is fixed to the other rounded corner 42 of the voice coil 4.
  • the voice coil 4 includes the left and right sides arranged in the length direction X of the electro-acoustic transducer 10, and two left round corners connecting the two ends of the left side, and two right round corners connecting the two ends of the right side.
  • the two flexible circuit boards 5 include a first flexible circuit board and a second flexible circuit board.
  • the first flexible circuit board is located on the outer side of the left side of the voice coil 4 and the second flexible circuit board is located on the outer side of the right side of the voice coil 4.
  • the end of the first branch and the end of the second branch of the first flexible circuit board are respectively connected to the two left corners of the voice coil 4, and the end of the first branch and the end of the second branch of the second flexible circuit board are respectively connected
  • the two right corners of voice coil 4 are rounded.
  • the branch ends (522, 532) of the flexible circuit board 5 are fixed to the bottom surface 44 of the voice coil 4.
  • the branch ends (522, 532) of the flexible circuit board 5 and the rounded corners 42 of the voice coil 4 can be fixed to each other by bonding.
  • the voice coil 4 includes two sub-voice coils, the two sub-voice coils are stacked in the thickness direction Z of the electroacoustic transducer 10, and the two ends of the lead wire of one sub-voice coil are electrically connected to the two flexible circuit boards 5 respectively.
  • One end of the branch and the two ends of the lead of the other sub-voice coil are respectively electrically connected to the other end of the branch of the two flexible circuit boards 5.
  • the two sub-voice coils include a first sub-voice coil and a second sub-voice coil
  • the end of the first branch of the first flexible circuit board is connected to one end of the lead of the first sub-voice coil
  • the end of the first branch of the second flexible circuit board is The end is connected to the other end of the lead of the first sub-voice coil
  • the end of the second branch of the second flexible circuit board is connected to one end of the lead of the second sub-voice coil
  • the end of the second branch of the first flexible circuit board is connected to the end of the second sub-voice coil.
  • the current can flow along "the end of the first branch of the first flexible circuit board-one end of the lead of the first sub voice coil-the other end of the lead of the first sub voice coil-the first branch of the second flexible circuit board End-the end of the second branch of the second flexible circuit board-one end of the lead of the second sub voice coil-the other end of the lead of the second sub voice coil-the end of the second branch of the first flexible circuit board"
  • the trajectory flows.
  • connection relationship between the two branch ends (522, 532) of the two flexible circuit boards 5 and the two sub-voice coils may also be different from the foregoing embodiment, which is not strictly limited in the embodiment of the present application.
  • the voice coil 4 may also include more sub-voice coils.
  • the voice coil 4 may also include a voice coil carrier, a plurality of sub-voice coils are wound and fixed to the voice coil carrier, one end of the voice coil carrier is fixedly connected to the sound film, and the other end is partially inserted into the magnetic circuit assembly.
  • the four auxiliary diaphragms 6 are respectively located outside the four rounded corners 42 of the voice coil 4.
  • the four auxiliary diaphragms 6 are arranged at intervals on the side of the two flexible circuit boards 5 away from the voice coil 4.
  • One end of the four auxiliary diaphragms 6 (that is, the first fixing portion 61) is respectively fixed to the end 522 of the first branch 52 and the end 532 of the second branch 53 of the two flexible circuit boards 5, and the other of each auxiliary diaphragm 6
  • One end ie, the second fixing portion 63
  • the four auxiliary diaphragms 6 include a first auxiliary diaphragm and a second auxiliary diaphragm located outside the left round corner of the voice coil 4, and further include a third auxiliary diaphragm located outside the right round corner of the voice coil 4. And the fourth auxiliary diaphragm.
  • the first fixing portion of the first auxiliary diaphragm and the first fixing portion of the second auxiliary diaphragm are respectively fixed to the end of the first branch and the end of the second branch of the first flexible circuit board.
  • the two fixing parts and the second fixing part of the second auxiliary diaphragm are respectively fixed to the two ends of the body of the first flexible circuit board.
  • the first fixing portion of the third auxiliary diaphragm and the first fixing portion of the fourth auxiliary diaphragm are respectively fixed to the end of the first branch and the end of the second branch of the second flexible circuit board.
  • the two fixing parts and the second fixing part of the fourth auxiliary diaphragm are respectively fixed to the two ends of the body of the second flexible circuit board.
  • one end of the auxiliary diaphragm 6 fixed to the flexible circuit board 5 exposes a part of the flexible circuit board 5.
  • the end portion 512 of the body 51 of the flexible circuit board 5 can be exposed through the notch 632 of the second fixing portion 63 of the auxiliary diaphragm 6.
  • the exposed area of the end portion 512 of the body 51 of the flexible circuit board 5 relative to the auxiliary diaphragm 6 can be used to connect other components of the electro-acoustic transducer 10. For example, as shown in FIG.
  • the exposed areas of the two end portions 512 of the body 51 of the flexible circuit board 5 can be used to fix (for example, solder) the two branch ends of the circuit board 40, so as to implement the electro-acoustic transducer 10 and Electrical connection of external devices.
  • FIG. 20 is a schematic diagram of the assembly structure of the flexible circuit board 5 and the voice coil 4 of the vibrating assembly 10 b shown in FIG. 10.
  • the first branch 52 and the second branch 53 of the flexible circuit board 5 are symmetrically arranged.
  • the first branch 52 and the second branch 53 may be symmetrical with respect to the second reference plane.
  • the connecting section 523 of the first branch section 52 includes a bending section 5231 and a straight section 5232.
  • One end of the bending section 5231 is connected to the end 522 of the first branch section 52, and the other end of the bending section 5231 is connected to one end of the straight section 5232.
  • the other end of the segment 5232 is connected to the head end 521 of the first branch 52.
  • the bending section 5231 includes one or more arc segments 5233, and each arc segment 5233 is coaxially arranged with the rounded corner 42 of the voice coil 4 connected to the first branch 52.
  • the two structures are arranged coaxially, which means that the center lines (or called center lines) of the two structures overlap, allowing slight deviations due to manufacturing tolerances, assembly tolerances, and the like.
  • the shape of the flexible circuit board 5 can be better. Adapting to the requirements of deformation and displacement, the flexible circuit board 5 has better reliability and longer service life.
  • the bending segment 5231 can make full use of the outer space of the rounded corner 42 of the voice coil 4, thereby arranging longer-sized traces. Therefore, when the flexible circuit board 5 vibrates greatly with the voice coil 4, the stress is smaller, and the reliability of the flexible circuit board 5 is higher.
  • the end portion 512 of the body 51 arranged close to the bent portion may have a larger area, and the end portion 512 of the body 51 has sufficient area and auxiliary
  • the diaphragm 6 is fixed to each other, and also has a sufficient area to be fixed to the external structure of the electro-acoustic transducer 10.
  • the extending direction of the straight section 5232 of the first branch 52 may be substantially parallel to the width direction Y of the electro-acoustic transducer 10.
  • the length of the straight section 5232 is larger, so that the length of the flexible circuit board 5 is longer, and it is easier to achieve a large amplitude.
  • the straight section 5232 occupies a small space in the length direction X of the electro-acoustic transducer 10, which is beneficial to suppress the space compression of the flexible circuit board 5 on the magnetic circuit assembly 10c, so that the magnetic circuit assembly 10c has a larger arrangement. Space to ensure the magnetic induction intensity and sensitivity of the electroacoustic transducer 10.
  • the bending section 5231 of the first branch section 52 also includes a multi-section transition section 5234.
  • the transition section 5234 can be arranged between adjacent arc segments 5233, or can be arranged between the arc segment 5233 and the straight segment 5232. It can also be arranged between the arc segment 5233 and the end 522 of the first branch 52.
  • FIG. 21 is a schematic diagram of the assembly structure of the auxiliary diaphragm 6, the flexible circuit board 5, and the voice coil 4 of the vibration assembly 10b shown in FIG.
  • the extension track of the vibrating portion 62 of the auxiliary diaphragm 6 is coaxially arranged with the rounded corner 42 of the voice coil 4 connected to the auxiliary diaphragm 6.
  • the shape of the vibration portion 62 of the auxiliary diaphragm 6 can better adapt to the deformation and displacement requirements, so that the auxiliary diaphragm 6 Better reliability and longer service life.
  • the arc segment 5233 of the bent section 5231 of the branch of the flexible circuit board 5 is also coaxially arranged with the rounded corner 42 of the voice coil 4 (refer to FIG.
  • the bent section 5231 of the branch of the flexible circuit board 5 and The vibration part 62 of the auxiliary diaphragm 6 has a similar deformation tendency during the vibration of the voice coil 4, which can reduce the risk of collision between the two, so that the reliability of the electroacoustic transducer 10 is higher.
  • FIG. 22 is an exploded schematic diagram of the magnetic circuit assembly 10c shown in FIG. 10
  • FIG. 23 is a partial structural diagram of the magnetic circuit assembly 10c shown in FIG.
  • the magnetic circuit assembly 10c of the electroacoustic transducer 10 includes a center pole piece 71, a side pole piece 72, a center magnet 81, two first side magnets 82, two second side magnets 83, two third side magnets 84, and Lower pole piece 9.
  • the center pole piece 71, the side pole piece 72 and the lower pole piece 9 are magnetic conductive parts.
  • the center magnet 81, the two first side magnets 82, the two second side magnets 83, and the two third side magnets 84 are permanent magnets, which together form a magnet group.
  • the lower pole piece 9 is roughly in the shape of a chamfered rectangle.
  • the lower pole piece 9 includes a top surface 91 and a bottom surface 92 opposite to each other, and a peripheral side surface 93 connected between the top surface 91 and the bottom surface 92.
  • the peripheral side surface 93 includes four side surfaces 931 and four chamfered surfaces 932, and a chamfered surface 932 is connected between two adjacent side surfaces 931.
  • Two opposite ends of the side surface 931 are recessed to form a clamping space 9311, and the lower pole piece 9 forms four clamping spaces 9311 arranged symmetrically in pairs.
  • the four detent spaces 9311 may be symmetrical with respect to the first reference plane, and may also be symmetrical with respect to the second reference plane.
  • the top surface 91 of the lower pole piece 9 is provided with a central groove 911 and four corner grooves 912.
  • the four corner grooves 912 are arranged around the central groove 911 and are spaced apart from the central groove 911.
  • the four corner grooves 912 are respectively located at the four corners of the top surface 303, and each corner groove 912 extends to the corresponding chamfered surface 932 and the side surface 931.
  • the center magnet 81, the two first side magnets 82, the two second side magnets 83 and the two third side magnets 84 are all fixed on the top surface 91 of the lower pole piece 9.
  • each magnet can be fixed to the top surface 91 of the lower pole piece 9 by bonding.
  • the lower pole piece 9 is perpendicular to the thickness direction Z of the electroacoustic transducer 10.
  • the thickness direction of the center magnet 81 is parallel to the thickness direction Z of the electroacoustic transducer 10.
  • the center magnet 81 is substantially rectangular or rectangular with rounded corners.
  • the central magnet 81 covers the central groove 911 of the lower pole piece 9.
  • the arrangement of the central groove 911 can not only reduce the weight of the lower pole piece 9, but also reduce the connection between the lower surface of the central magnet 81 and the top surface 91 of the lower pole piece 9 The area makes the connection between the surface and the surface easier to achieve and the connection quality is higher.
  • the central groove 911 may also be omitted from the lower pole piece 9.
  • the two first side magnets 82 are symmetrically arranged on both sides of the center magnet 81, and a first gap 85 is formed between the first side magnet 82 and the center magnet 81.
  • the two first side magnets 82 may be symmetrical with respect to the first reference plane.
  • the two second side magnets 83 are symmetrically arranged on both sides of the center magnet 81, and the second side magnet 83 is located on the side of the first side magnet 82 away from the center magnet 81.
  • the two second side magnets 83 may be symmetrical with respect to the first reference plane.
  • the second side magnet 83, the first side magnet 82, and the center magnet 81 are arranged in the first direction (that is, the length direction X of the electroacoustic transducer 10).
  • the second side magnet 83 and the first side magnet 82 located on the same side of the central magnet 81 are fixed to each other.
  • the two sides of the second side magnet 83 and the first side magnet 82 facing each other are bonded to each other to ensure the magnetic The reliability of the circuit assembly 10c.
  • the two third side magnets 84 are symmetrically arranged on the other two sides of the center magnet 81, and a third gap 86 is formed between the third side magnet 84 and the center magnet 81.
  • the two third side magnets 84 may be symmetrical with respect to the second reference plane.
  • the third side magnet 84 and the center magnet 81 are arranged in the second direction (that is, the width direction Y of the electroacoustic transducer 10).
  • four communicating spaces 87 are formed on the outer sides of the four corners of the central magnet 81, and each communicating space 87 communicates with the adjacent first gap 85 and the third gap 86, and also communicates with the outside of the magnetic circuit assembly 10c.
  • the four corner grooves 912 of the lower pole piece 9 communicate with the four communicating spaces 87 one-to-one to form a space with a larger volume.
  • the side pole piece 72 includes a connecting frame portion 721 and two first pole piece portions 722 and two second pole piece portions 723 located inside the connecting frame portion 721, two first pole pieces
  • the piece portion 722 is symmetrically connected to the two straight sides of the connecting frame portion 721
  • the two second pole piece portions 723 are symmetrically connected to the other two straight sides of the connecting frame portion 721.
  • the two first pole piece portions 722 may be symmetrical with respect to the first reference plane
  • the two second pole piece portions 723 may be symmetrical with respect to the second reference plane.
  • the first pole piece portion 722 is substantially T-shaped.
  • the first pole piece portion 722 includes a first portion 7221 and a second portion 7222, and the second portion 7222 connects the first portion 7221 and the connecting frame portion 721.
  • An escape gap 7223 is formed on both sides of the second portion 7222 of the first pole piece portion 722, and the escape gap 7223 is located between the first portion 7221 of the first pole piece portion 722 and the connecting frame portion 721.
  • Each corner gap 724 is located between the adjacent first pole piece portion 722 and the second pole piece portion 723, and each corner gap 724 communicates with the adjacent avoiding gap 7223.
  • At least one limiting hole 725 is formed on the outer side of two straight sides of the connecting frame portion 721. Exemplarily, the straight side provided with the limiting hole 725 is the same as the straight side connected to the second pole piece part 723.
  • FIG. 24 is a structural diagram of the magnetic circuit assembly 10c shown in FIG. 10 taken along the H-H section.
  • the center pole piece 71 is fixed to the side of the center magnet 81 away from the lower pole piece 9, and the center pole piece 71 can be fixed to the center magnet 81 by bonding.
  • the side pole piece 72 is located on the side of the first side magnet 82, the second side magnet 83 and the third side magnet 84 away from the lower pole piece 9.
  • the side pole piece 72 is arranged around the center pole piece 71.
  • the corner gap 724 of the side pole piece 72 and the communication space 87 outside the four corners of the center magnet 81 communicate with each other.
  • the first pole piece portion 722 of the side pole piece 72 is disposed directly opposite to the first side magnet 82 and the second side magnet 83.
  • the first part 7221 of the first pole piece part 722 is arranged opposite to the first side magnet 82
  • the second part 7222 of the first pole piece part 722 is arranged opposite to the second side magnet 83
  • the side pole piece 72 is connected to the frame part 721
  • the straight side portion of the second portion 7222 connected to the first pole piece portion 722 is disposed directly opposite to the second side magnet 83.
  • the first part 7221 of the first pole piece portion 722 and the first side magnet 82 can be fixed by bonding.
  • a gap is formed between the second portion 7222 of the first pole piece portion 722 and the connecting frame portion 721 and the second side magnet 83.
  • a second gap 88 is formed between the first pole piece portion 722 and the center pole piece 71, and the second gap 88 communicates with the first gap 85.
  • the second gap 88 also communicates with the corner gap 724 of
  • FIG. 25 is a schematic structural diagram of the magnetic circuit assembly 10c shown in FIG. 10 cut along the I-I.
  • the second pole piece portion 723 of the side pole piece 72 is disposed directly opposite to the third side magnet 84.
  • a fourth gap 89 is formed between the second pole piece portion 723 and the center pole piece 71, and the fourth gap 89 communicates with the third gap 86.
  • the fourth gap 89 also communicates with the corner gap 724 of the side pole piece 72.
  • the connecting frame portion 721 of the side pole piece 72 is connected to the straight side portion of the second pole piece portion 723 and is disposed directly opposite to the third side magnet 84.
  • the third side magnet 84 makes full use of the space between the side pole piece 72 and the lower pole piece 9 to have a larger size in the width direction Y of the electroacoustic transducer 10, so that the magnetic induction of the magnetic circuit assembly 10c The intensity is higher.
  • the specific positional relationship and connection relationship between the vibrating assembly 10b and the magnetic circuit assembly 10c of the electroacoustic transducer 10 and the basin frame 1 will be described below. It can be understood that the components of the electro-acoustic transducer 10 can be arranged as compactly as possible to facilitate the realization of electro-acoustic conversion under the condition that they meet the requirements of the relative position relationship and meet the performance requirements of the electro-acoustic transducer 10. The miniaturization, miniaturization and portability of the energy device 10.
  • FIG. 26 is a structural diagram of the electroacoustic transducer 10 shown in FIG. 9 cut along the JJ position
  • FIG. 27 is the electroacoustic transducer 10 shown in FIG. 9 cut along the KK position Schematic diagram of the structure.
  • the peripheral edge of the sound membrane 2 is fixed to the first surface 111 of the frame 11 of the basin frame 1.
  • the diaphragm 21 of the sound diaphragm 2 can be fixed to the first surface 111 of the frame 11 of the basin frame 1 by bonding.
  • the vibration direction of the sound membrane 2 is parallel to the thickness direction Z of the electroacoustic transducer 10.
  • the inner space of the frame 11 is formed into a shape with a narrow bottom and a wide top, so that the vibrating portion 212 of the diaphragm 21 has a larger vibration space, which is beneficial for the sound diaphragm 2 to achieve a large vibration.
  • the voice coil 4 is located inside the frame 11 and one end is fixedly connected to the sound membrane 2.
  • the voice coil 4 is connected to the sound film 2 through the connection frame 3.
  • the connecting frame 3 is fixedly connected to the dome 22 of the sound film 2.
  • the connecting frame 3 is fixedly connected to the diaphragm 21.
  • the lower pole piece 9 is fixedly connected to the plurality of legs 12 of the basin frame 1 and is spaced apart from the frame body 11. Among them, the ends of the plurality of legs 12 of the basin frame 1 can be accommodated in the clamping space 9311 of the lower pole piece 9 (as shown in FIG. 22), and are bonded to the surface of the lower pole piece 9 facing the clamping space 9311. Fixed to each other.
  • the vertical direction of the lower pole piece 9 is parallel to the thickness direction of the electroacoustic transducer.
  • the center magnet 81, the two first side magnets 82, the two second side magnets 83 and the two third side magnets 84 are all fixed to the side of the lower pole piece 9 facing the frame 11.
  • the two first side magnets 82 are located on both sides of the center magnet 81
  • the two second side magnets 83 are located on both sides of the center magnet 81
  • the first side magnet 82 is located between the second side magnet 83 and the center magnet 81.
  • One end of the voice coil 4 away from the sound film 2 is located in the first gap 85 between the first side magnet 82 and the center magnet 81.
  • the two third side magnets 84 are located on the other two sides of the center magnet 81.
  • the end portion of the voice coil 4 away from the sound film 2 is located in the third gap 86 between the third side magnet 84 and the center magnet 81.
  • the center pole piece 71 is fixed on the side of the center magnet 81 facing the sound membrane 2, and the center pole piece 71 is located between the center magnet 81 and the sound membrane 2.
  • the electroacoustic transducer 10 is supported between the frame body 11 and the lower pole piece 9 through a plurality of legs 12, and the multiple legs 12 can not only support and connect, but also occupy the frame body 11 and the lower pole piece 9.
  • the space between is very small, so that a larger magnetic circuit arrangement space is formed between the frame body 11 and the lower pole piece 9.
  • the magnetic circuit assembly 10c can make full use of this space to arrange the magnets so that the electro-acoustic transducer 10 The magnetic induction is higher and the sensitivity is better.
  • FIG. 28 is a schematic diagram of the assembled structure of the side pole piece 72 of the electro-acoustic transducer 10 and the basin frame 1 shown in FIG. 9.
  • the side pole piece 72 is fixed to the inner side of the frame 11.
  • the connecting frame portion 721 of the side pole piece 72 can be snapped into the fixing groove 115 of the frame body 11.
  • the connecting frame portion 721 is partly located in the fixing groove 115 and partly outside the fixing groove 115, and the first pole piece part of the side pole piece 72
  • the 722 and the second pole piece part 723 are located outside the fixing groove 115.
  • the limiting strip 131 of the limiting block 13 of the basin frame 1 abuts the connecting frame portion 721 of the side pole piece 72.
  • at least one limiting pin 132 of the limiting block 13 is locked into at least one limiting hole 725 of the connecting frame portion 721 in a one-to-one correspondence.
  • the two first pole piece portions 722 of the side pole piece 72 are respectively located on both sides of the center pole piece 71, a second gap 88 is formed between the first pole piece portion 722 and the center pole piece 71, and the second gap 88 is formed between the first pole piece portion 722 and the center pole piece 71.
  • the gap 88 communicates with the first gap 85, and the voice coil 4 is partially located in the second gap 88.
  • the two second pole piece portions 723 of the side pole piece 72 are respectively located on the other two sides of the center pole piece 71, and a fourth gap 89 is formed between the second pole piece portion 723 and the center pole piece 71.
  • the four gap 89 communicates with the third gap 86, and the voice coil 4 is located in the fourth gap 89.
  • FIG. 29 is a schematic diagram of the magnetic circuit assembly 10c and the voice coil 4 shown in FIG. 26, and FIG. 30 is a schematic diagram of the magnetic circuit assembly 10c and the voice coil 4 shown in FIG. 27.
  • the end of the central magnet 81 close to the central pole piece 71 is an N pole
  • the end close to the lower pole piece 9 is an S pole
  • the end of the first side magnet 82, the second side magnet 83, and the third side magnet 84 close to the side pole piece 72 is an S pole
  • the end close to the lower pole piece 9 is an N pole.
  • the path of the lines of magnetic force is "N pole of center magnet 81-center pole piece 71-second gap 88-side pole piece 72-S of first side magnet 82 Pole—N pole of magnet 82 on the first side—lower pole piece 9—S pole of center magnet 81", and “N pole of center magnet 81—center pole piece 71—second gap 88—side Pole piece 72—S pole of the second side magnet 83—N pole of the second side magnet 83—lower pole piece 9—S pole of the center magnet 81”, and “N pole of the center magnet 81—center Pole piece 71-the fourth gap 89-side pole piece 72-the S pole of the third side magnet 84-the N pole of the third side magnet 84-the lower pole piece 9-the S pole of the center magnet 81" .
  • the voice coil 4 Since the voice coil 4 is partially located in the second gap 88 and the fourth gap 89, the magnetic components form a magnetic field in the second gap 88 and the fourth gap 89. Therefore, when the voice coil 4 is energized, an ampere force is generated to drive the voice coil 4 and the connection The sound film 2 of the voice coil 4 vibrates.
  • the magnetic circuit assembly 10c is designed with a seven-magnetic circuit structure, so that the magnetic induction intensity of the second gap 88 is very high, and the magnetic circuit assembly 10c has a sufficiently high magnetic induction intensity, thereby increasing the driving force of the magnetic circuit, and the voice coil 4 is energized
  • the ampere force received at time is greater, and the sensitivity of the electro-acoustic transducer 10 is higher.
  • the end of the central magnet 81 close to the central pole piece 71 is an S pole
  • the end close to the lower pole piece 9 is an N pole
  • the end of the first side magnet 82, the second side magnet 83, and the third side magnet 84 close to the side pole piece 72 is the N pole
  • the end close to the lower pole piece 9 is the S pole.
  • the voice coil 4 is connected to the sound film 2 through the connection frame 3. Therefore, the distance between the end of the voice coil 4 far away from the sound film 2 and the sound film 2 is large, so that the voice coil 4 can be fully inserted.
  • the magnetic circuit assembly 10c, the magnetic field generated by the magnetic circuit assembly 10c effectively acts on the voice coil 4, and the distance between the sound membrane 2 and the magnetic circuit assembly 10c is large, and the vibration space of the sound membrane 2 is large, which helps the sound membrane 2 Achieve large-scale vibration.
  • FIG. 31 is a partial structural diagram of the electroacoustic transducer 10 shown in FIG. 9.
  • FIG. 31 illustrates the positional relationship between the flexible circuit board 5 and the basin frame 1 and the side pole piece 72.
  • the two flexible circuit boards 5 are both partially fixed on the second surface 112 of the frame body 11 of the basin 1 and are distributed symmetrically at intervals.
  • the two branch ends (522, 532) of the flexible circuit board 5 are fixed to the two rounded corners 42 of the voice coil 4, respectively.
  • the body 51 of the flexible circuit board 5 is fixed to the second surface 112 of the frame 11, the first branch 52 and the second branch 53 of the flexible circuit board 5 are suspended relative to the frame 11, and the first branch of the flexible circuit board 5
  • the end 522 of the joint 52 and the end 532 of the second branch 53 are respectively fixed to the two rounded corners 42 of the voice coil 4.
  • the flexible circuit board 5 and the side pole piece 72 are spaced apart from each other.
  • the main body 51 and the side pole pieces 72 of the flexible circuit board 5 may be stacked and spaced apart from each other in the thickness direction Z of the electroacoustic transducer 10, and are fixed to the main body 51 and the side of the flexible circuit board 5 of the basin frame 1.
  • the pole pieces 72 are separated by a partial structure of the basin frame 1.
  • the head end 521 of the first branch section 52 of the flexible circuit board 5 is directly opposite to the second part 7222 of the first pole piece portion 722 of the side pole piece 72, and the head end 521 of the first branch section 52 is connected to the first pole piece portion 722.
  • the second portions 7222 are spaced apart from each other in the thickness direction Z of the electroacoustic transducer 10.
  • the connecting section 523 and the end 522 of the first branch section 52 are directly opposite to the avoidance gap 7223 and the corner gap 724 on the side of the second portion 7222 of the first pole piece portion 722.
  • the first branch 52 vibrates under the drive of the voice coil 4, the amplitude of the first branch 52 gradually decreases from the end 522 to the head end 521, and the amplitude of the head end 521 of the first branch 52 is small or not. Therefore, the first branch 52 can make full use of the gap of the side pole piece 72 to vibrate, and will not rub against the side pole piece 72 when vibrating, which is beneficial to improve the reliability of the electroacoustic transducer 10.
  • the head end 531 of the second branch 53 of the flexible circuit board 5 is directly opposite to the second part 7222 of the first pole piece part 722 of the side pole piece 72, and the head end 531 of the second branch 53 is opposite to the second part 7222 of the first pole piece part 722.
  • the portions 7222 are spaced apart from each other in the thickness direction Z of the electroacoustic transducer 10.
  • the connecting section 533 and the end 532 of the second branch 53 are directly opposite to the avoidance gap 7223 and the corner gap 724 on the other side of the second portion 7222 of the first pole piece portion 722.
  • the amplitude of the second branch 53 gradually decreases from the end 532 to the head end 531, and the amplitude of the head end 531 of the second branch 53 is very small or does not vibrate, so
  • the second branch 53 can make full use of the gap of the side pole piece 72 to vibrate, and will not rub against the side pole piece 72 during vibration, which is beneficial to improve the reliability of the electro-acoustic transducer 10.
  • FIG. 32 is a schematic diagram of another part of the structure of the electroacoustic transducer 10 shown in FIG. 9.
  • FIG. 32 illustrates the positional relationship between the flexible circuit board 5 and the magnets of the magnetic circuit assembly 10c.
  • the two flexible circuit boards 5 are symmetrically arranged on both sides of the central magnet 81.
  • the flexible circuit board 5 is located on the side of the first side magnet 82 away from the center magnet 81.
  • the first side magnet 82 is located between the flexible circuit board 5 and the center magnet 81.
  • the flexible circuit board 5 is located between the second side magnet 83 and the sound film 2.
  • the second side magnet 83 is located between the flexible circuit board 5 and the lower pole piece 9.
  • the electroacoustic transducer 10 of this embodiment changes the relative relationship between the flexible circuit board 5 and the first side magnet 82.
  • the positional relationship makes the gap between the first side magnet 82 and the center magnet 81 narrower, and the magnetic induction intensity of the magnetic circuit assembly 10c is higher, which helps to improve the sensitivity of the electro-acoustic transducer 10.
  • the electro-acoustic transducer 10 uses the space between the flexible circuit board 5 and the lower pole piece 9 to add a pair of second side magnets 83, thereby effectively increasing the magnetic induction intensity of the magnetic circuit assembly 10c, and significantly improving the magnetic circuit assembly 10c.
  • the driving force, the electroacoustic transducer 10 has better sensitivity.
  • the electro-acoustic transducer 10 of the embodiment of the present application has improved the structure of the traditional 5-magnetic circuit (that is, including a central magnet and four side magnets) to a 7-magnetic circuit (that is, including a center magnet, six side magnets).
  • the structure of the side magnet can increase the sensitivity of the electroacoustic transducer 10 by 0.2 dB to 0.8 dB.
  • the first side magnet 82 is spaced apart from the flexible circuit board 5.
  • the distance between the first side magnet 82 and the flexible circuit board 5 may be 0.1 mm to 0.5 mm In the range.
  • the second side magnet 83 is spaced apart from the flexible circuit board 5.
  • the distance between the flexible circuit board 5 and the second side magnet 83 may be in the range of 0.1 mm to 0.7 mm. It can be understood that the distance between the flexible circuit board 5 and the first side magnet 82 and the second side magnet 83 can be designed according to the specific requirements of the electroacoustic transducer 10, which is not strictly limited in the embodiment of the present application.
  • the height of the first side magnet 82 is greater than the height of the second side magnet 83.
  • the first side magnet 82 and the flexible circuit board 5 are not stacked in the thickness direction Z of the electroacoustic transducer 10, the height of the first side magnet 82 can be greater than the height of the second side magnet 83 In order to make full use of the space and increase the magnetic induction intensity of the magnetic circuit assembly 10c, the sensitivity of the electro-acoustic transducer 10 is better.
  • the height of the first side magnet 82 may be greater than the height of the second side magnet 83, the height of the flexible circuit board 5, and the second side magnet 83 and the flexible circuit The sum of the pitches of the plates 5.
  • the third side magnet 84 is spaced apart from the flexible circuit board 5.
  • both ends of the third side magnet 84 are close to the branch ends (522, 532) of the flexible circuit board 5, and both end faces 841 of the third side magnet 84 are partially recessed to form an avoidance area 842, which is connected to the third side.
  • the gap 86 the branch ends (522, 532) of the flexible circuit board 5 are located in the avoidance area 842 and form a gap with the wall surface of the avoidance area 842.
  • FIG. 33 is a structural diagram of the electro-acoustic transducer 10 shown in FIG. 9 taken along L-L.
  • the body 51 of the flexible circuit board 5 is fixed to the frame 1, and the end 522 of the first branch 52 and the end 532 of the second branch 53 of the flexible circuit board 5 are respectively fixed to the two rounded corners 42 of the voice coil 4.
  • the voice coil 4 vibrates, the end 522 of the first branch 52 and the end 532 of the second branch 53 vibrate with the voice coil 4.
  • the connecting section 523 to the head end 521 the amplitude gradually decreases From the end 532 of the second branch 53 and the connecting section 533 to the head end 531, the amplitude gradually decreases, and the amplitude of the head end 521 of the first branch 52 and the head end 531 of the second branch 53 is very small.
  • the two end portions 512 of the main body 51 of the flexible circuit board 5 are arranged facing the communication space 87 of the magnetic circuit assembly 10c, and the middle portion 511 of the main body 51 is arranged facing the second side magnet 83.
  • the head end 521 of the first branch 52 and the head end 531 of the second branch 53 are arranged directly opposite to the second side magnet 83, and the part of the connecting section 523 of the first branch 52 close to the head end 521 is arranged directly opposite to the second side magnet 83
  • the part far away from the head end 521 is directly facing the communicating space 87
  • the part of the connecting section 533 of the second branch 53 close to the head end 531 is facing the second side magnet 83
  • the part far away from the head end 531 is facing the communicating space 87
  • the end 522 of the first branch 52 and the end 532 of the second branch 53 are arranged directly opposite to the communication space 87.
  • the first branch 52 and the second branch 53 of the flexible circuit board 5 can vibrate using the communication space 87 of
  • the second side magnet 83 is arranged directly opposite to the head end 521 of the first stub 52, the head end 531 of the second stub 53 and the middle part 511 of the main body 51, so the second side magnet 83 can be used for electro-acoustic exchange.
  • the space under the flexible circuit board 5 is fully utilized, thereby having a larger size, so as to effectively increase the magnetic induction intensity of the magnetic circuit assembly 10c.
  • the second side magnet 83 is facing the head end 521 of the first branch 52 with small amplitude and a part of the connecting section 523 close to the head end 521, the head end 531 of the second branch 53 and a part of the connecting section 533 close to the head end 531, Therefore, the second side magnet 83 can make full use of the space below the flexible circuit board 5 in the width direction Y of the electroacoustic transducer 10, thereby having a larger size, so as to effectively increase the magnetic induction intensity of the magnetic circuit assembly 10c.
  • auxiliary diaphragm 6 is connected to the end 512 of the main body 51 of the flexible circuit board 5, and the other end is connected to the branch ends (522, 532) of the flexible circuit board 5.
  • the auxiliary diaphragm 6 is located in the communication space 87 of the magnetic circuit assembly 10 c and vibrates in the communication space 87.
  • the electroacoustic transducer 10 includes two compliant systems, the sound membrane 2 is the first compliant system located on the upper part of the voice coil 4, and the flexible circuit board 5 and the auxiliary diaphragm 6 are the second compliant systems located on the lower part of the voice coil 4.
  • the two compliant systems vibrate with the voice coil 4, which can suppress the roll vibration of the voice coil 4, which helps to ensure that the electroacoustic transducer 10 has a better sound quality.
  • the compliance coefficient of the compliance system is the reciprocal of the elastic coefficient, and components with high compliance coefficients are more prone to deformation when subjected to force.
  • the hardness of the sound membrane 2 is greater and the compliance is less, so that the sound membrane 2 can smoothly push the air to produce sound; the rigidity of the flexible circuit board 5 and the auxiliary diaphragm 6 are less ,
  • the compliance is large, so that the total hardness of the two compliance systems is appropriate, so as to ensure that the volume of the electroacoustic transducer 10 is large.
  • the hardness of the auxiliary diaphragm 6 is greater than the hardness of the flexible circuit board 5, so that the hardness of the second compliant system is greater, and the stability is better, so as to better restrain the voice coil 4 from swinging and make the voice coil 4 roll. smaller.
  • FIG. 34 is a structural diagram of the first side magnet 82 and the second side magnet 83 shown in FIG. 32.
  • the electroacoustic transducer 10 designs the shape of the second side magnet 83 according to the vibration amplitude of the first branch 52 and the second branch 53 of the flexible circuit board 5.
  • the second side magnet 83 includes a first surface 831 and a second surface 832 disposed opposite to each other.
  • the first surface 831 faces the flexible circuit board 5.
  • the second surface 832 is fixed to the lower pole piece 9 (as shown in FIG. 23), and the second surface 832 is a flat surface.
  • the first surface 831 includes a first flat surface 8311, a first inclined surface 8312, and a second inclined surface 8313.
  • the first plane 8311 is directly opposite to the head end 521 of the first stub 52 and the head end 531 of the second stub 53, and the first plane 8311 is parallel to the second surface 832.
  • the first inclined surface 8312 faces the connecting section 523 of the first branch 52, one end of the first inclined surface 8312 is connected to one end of the first plane 8311, and the other end of the first inclined surface 8312 extends in a direction close to the second surface 832.
  • the second inclined surface 8313 faces the connecting section 523 of the first branch 52, one end of the second inclined surface 8313 is connected to the other end of the first plane 8311, and the other end of the second inclined surface 8313 extends in a direction close to the second surface 832.
  • the second side magnet 83 has a structure with a middle height and a gradually decreasing height on both sides.
  • the middle height position is facing the part of the flexible circuit board 5 with small amplitude
  • the position with the decreasing height on both sides is facing the flexible circuit board 5 with a gradually increasing amplitude.
  • the large part can not only reserve the vibration space of the flexible circuit board 5, but also make full use of the non-interference height and increase the size of the magnet, so that the magnetic induction intensity of the electro-acoustic transducer 10 can be higher.
  • the size of the second side magnet 83 in the width direction Y of the electro-acoustic transducer 10 may be in the range of 2 mm to 10 mm.
  • the first plane 8311 may also face other parts of the flexible circuit board 5 with a smaller amplitude, for example, the connecting section 523 of the first branch 52 is close to the head end 521 and the connecting section 533 of the second branch 53 is close to the head end. 531 part.
  • the second side magnet 83 has a larger volume, which can increase the magnetic induction intensity of the electroacoustic transducer 10.
  • the second inclined surface 8313 and the first inclined surface 8312 may be symmetrically arranged, and the symmetry plane is perpendicular to the second surface 832.
  • the second inclined surface 8313 and the first inclined surface 8312 may be symmetrical with respect to the second reference plane. Since the first stub 52 and the second stub 53 of the flexible circuit board 5 are symmetrically arranged, and the vibration amplitudes of the two are symmetrical, the symmetrically arranged second inclined surface 8313 and the first inclined surface 8312 can better It matches the vibration of the first branch 52 and the second branch 53.
  • the first side magnet 82 is a rectangular parallelepiped.
  • the second side magnet 83 also includes two opposite side surfaces (833, 834).
  • the side surface 833 is connected to an end of the second surface 832 and an end of the first inclined surface 8312 away from the first plane 8311.
  • the side surface 834 is connected to the first surface 8311. The other end of the two surfaces 832 and one end of the second inclined surface 8313 away from the first plane 8311.
  • the first side magnet 82 and the second side magnet 83 are of separate design, and the two can be fixed to each other by bonding adjacent surfaces. Since the second side magnet 83 and the first side magnet 82 have different shapes on the YZ plane (that is, the plane where the width direction Y and the thickness direction Z of the electroacoustic transducer 10 are located), they are formed separately and then assembled into an integrated form. The structure can reduce the cost, so that the cost of the electro-acoustic transducer 10 is lower.
  • first side magnet 82 and the second side magnet 83 may also be integrally formed special-shaped magnets.
  • FIG. 35 is a structural diagram of the first side magnet 82 and the second side magnet 83 of FIG. 32 in another embodiment
  • FIG. 36 is the first side magnet 82 shown in FIG. 35
  • the dimension of the second side magnet 83 in the width direction Y of the electroacoustic transducer 10 is the second width W2
  • the dimension of the first side magnet 82 in the width direction Y of the electroacoustic transducer 10 is the first width W1
  • the second width W2 is smaller than the first width W1.
  • the width of the second side magnet 83 in the width direction Y of the electro-acoustic transducer 10 is relatively small, and the second side magnet 83 faces the part of the flexible circuit board 5 with a small amplitude, for example, the first branch
  • the head end 521 of the 52 and the head end 531 of the second branch 53; the space on both sides of the second side magnet 83 in the width direction Y of the electroacoustic transducer 10 can be used as the vibration space of the flexible circuit board 5, facing the flexible circuit
  • the second side magnet 83 can also face other parts of the flexible circuit board 5 with a smaller amplitude, for example, the connecting section 523 of the first branch 52 is close to the head end 521 and the connecting section 533 of the second branch 53 is close to the head.
  • the end 531 has a larger volume.
  • the first surface 831 of the second side magnet 83 is parallel to the second surface 832, and the second side magnet 83 is a rectangular parallelepiped.
  • the second width W2 of the second side magnet 83 can be appropriately increased, or the height of the second side magnet 83 can be reduced while meeting the vibration space requirements of the first stub 52 and the second stub 53 And greatly increase the second width W2 of the second side magnet 83 (at this time, the second width W2 may be equal to or greater than the first width W1 of the first side magnet 82), so that the volume of the second side magnet 83 is more Big.
  • FIG. 37 is a structural diagram of the first side magnet 82 and the second side magnet 83 of FIG. 32 in another embodiment
  • FIG. 38 is the first side magnet 82 shown in FIG. 37
  • the cross-sectional shape of the second side magnet 83 parallel to the YZ plane is trapezoidal.
  • the first surface 831 of the second side magnet 83 is parallel to the second surface 832.
  • the first surface 831 faces the head end 521 of the first branch 52 and the head end 531 of the second branch 53 of the flexible circuit board 5.
  • the second side magnet 83 also includes a first side surface 835 and a second side surface 836.
  • the first side surface 835 connects one end of the first surface 831 to one end of the second surface 832, and the second side surface 836 connects the other end of the first surface 831 to the first surface 831.
  • the first side surface 835 is facing the connecting section 523 of the first branch 52
  • the second side surface 836 is facing the connecting section 533 of the second branch 53.
  • FIG. 39 is a structural diagram of the first side magnet 82 and the second side magnet 83 of FIG. 32 in another embodiment
  • FIG. 40 is the first side magnet 82 shown in FIG. 39
  • the first side magnet 82 and the second side magnet 83 are integrally formed.
  • the cross-sectional shape of the first side magnet 82 is the same as the cross-sectional shape of the second side magnet 83, the cross section of the first side magnet 82 and the cross section of the second side magnet 83 are both perpendicular to the length direction of the electroacoustic transducer 10 X.
  • the height of the first side magnet 82 is lower than that of the previous embodiment, and its multiple outer surfaces parallel to the length direction X of the electroacoustic transducer 10 are coplanar with the second side magnet 83, so that The first side magnet 82 and the second side magnet 83 can be integrally formed to simplify the assembly process and improve the assembly accuracy.
  • each surface of the first surface 831 of the second side magnet 83 and the flexible circuit board 5 can be the same as the foregoing embodiment, and the first side magnet 82 is arranged along with the position of the second side magnet 83.
  • FIG. 41 is a structural diagram of the first side magnet 82 and the second side magnet 83 of FIG. 32 in another embodiment. The following mainly describes the difference between this embodiment and the foregoing embodiment, and most of the same content of the two will not be repeated.
  • the first side magnet 82 and the second side magnet 83 are integrally formed.
  • the height H1 of the first side magnet 82 is the same as the height H2 of the second side magnet 83.
  • the dimension of the second side magnet 83 in the width direction Y of the electroacoustic transducer 10 is the second width W2
  • the dimension of the first side magnet 82 in the width direction Y of the electroacoustic transducer 10 is the first width W1
  • the second width W2 is smaller than the first width W1.
  • the height H1 of the first side magnet 82 of this embodiment is reduced, and the first side magnet 82 and the second side magnet 83 are located at two positions parallel to the XY plane. Both surfaces are coplanar, so that the first side magnet 82 and the second side magnet 83 can be integrally formed to simplify the assembly process and improve the assembly accuracy.
  • FIG. 42 is a structural diagram of the first side magnet 82 and the second side magnet 83 of FIG. 32 in another embodiment
  • FIG. 43 is the first side magnet 82 shown in FIG. 42
  • the second side magnet 83 includes a first magnetic portion 83 a and a second magnetic portion 83 b, and the first magnetic portion 83 a is located between the second magnetic portion 83 b and the first side magnet 82.
  • the second magnetic portion 83b is arranged facing the main body 51 of the flexible circuit board 5, and the first magnetic portion 83a is arranged facing the head end 521 of the first branch 52 and the head end 531 of the second branch 53 of the flexible circuit board 5.
  • the magnetic portion 83a can also be arranged directly opposite to the connecting section 523 of the first branch 52 near the head end 521 and the connecting section 533 of the second branch 53 near the head end 531.
  • the length of the first magnetic portion 83a in the longitudinal direction X of the electroacoustic transducer 10 is shorter than that of the second side magnet 83 of the foregoing embodiment.
  • the first magnetic portion 83a please refer to the foregoing The second side magnet 83 of the embodiment.
  • the height H4 of the second magnetic portion 83b is greater than the height H3 of the first magnetic portion 83a, and the height H4 of the second magnetic portion 83b is less than the height H1 of the first side magnet 82 .
  • the top surface of the second magnetic portion 83b may be in contact with the body 51 of the flexible circuit board 5, so as to make full use of the space under the flexible circuit board 5.
  • first magnetic portion 83a and the second magnetic portion 83b may be integrally formed, or may be assembled (for example, adhesive) to form an integrated structure.
  • first side magnet 82 and the second side magnet 83 described in the foregoing embodiments can be combined with each other to form a new embodiment.
  • FIG. 44 is a structural diagram of the flexible circuit board 5, the first side magnet 82 and the second side magnet 83 of FIG. 32 in another embodiment, and FIG. 45 is shown in FIG. 44 The structure diagram of the first side magnet 82 and the second side magnet 83. The following mainly describes the difference between this embodiment and the foregoing embodiment, and most of the same content of the two will not be repeated.
  • the flexible circuit board 5 includes a main body 51, a first branch 52 and a second branch 53.
  • the main body 51 includes a middle part 511 and two end parts 512 respectively connected to two sides of the middle part 511.
  • the head end 521 of the first branch 52 and the head end 531 of the second branch 53 are respectively connected to the two ends 512 of the body 51.
  • the second side magnet 83 faces the middle part 511 of the main body 51 of the flexible circuit board 5.
  • the two first side magnets 82 are located between the two second side magnets 83.
  • the electro-acoustic transducer 10 of this embodiment can compress the length of the second side magnet 83 and increase the length of the first side magnet 82 in the longitudinal direction X, so that the magnetic induction intensity of the magnetic circuit assembly 10c is greater.
  • the length L1 of the first side magnet 82 may be greater than the length L2 of the second side magnet 83.
  • the first side magnet 82 is a rectangular parallelepiped
  • the second side magnet 83 is a rectangular parallelepiped.
  • the height H1 of the first side magnet 82 may be greater than the height H2 of the second side magnet 83.
  • the width W2 of the second side magnet 83 may be greater than the width W1 of the first side magnet 82.

Landscapes

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

Abstract

本申请实施例公开一种电声换能器,包括中心磁铁、两个第一边磁铁、两个第二边磁铁、音圈、音膜以及两个柔性电路板。两个第一边磁铁对称地排布于中心磁铁的两侧,第一边磁铁与中心磁铁之间形成第一间隙,两个第二边磁铁对称地排布于中心磁铁的两侧,第二边磁铁位于第一边磁铁远离中心磁铁的一侧。音圈的一端部分位于第一间隙,音膜固接音圈的另一端。两个柔性电路板对称地排布于中心磁铁的两侧,柔性电路板位于第一边磁铁远离中心磁铁的一侧,且位于第二边磁铁与音膜之间,柔性电路板的两个枝节末端分别固接音圈的两个角。上述电声换能器的磁感应强度较高、灵敏度较佳。本申请实施例还提供一种扬声器模组及电子设备。

Description

电声换能器、扬声器模组及电子设备
本申请要求于2019年11月28日提交中国专利局、申请号为201911194492.1、申请名称为“电声换能器、扬声器模组及电子设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及音频技术领域,尤其涉及一种电声换能器、扬声器模组及电子设备。
背景技术
动圈式微型扬声器为电声换能器,是目前便携式电子设备常用的音频组件。随着消费者对电子设备的音质要求越来越高,扬声器通常需要设计更大的振幅。目前,扬声器包括音圈和连接音圈的导线,由于导线需要随音圈进行大幅度振动,因此业内采用柔性电路板(flexible printed circuit,FPC)形成导线,以降低导线因疲劳而发生断裂的风险。
由于音圈插入扬声器的磁路中,柔性电路板需要随音圈在磁路中振动,因此柔性电路板的结构尺寸与扬声器的磁路尺寸是相互影响的,且两者之间还需要预留一定的设计间隙,以防止柔性电路板振动时与磁路之间出现擦碰。故而,当柔性电路板为降低大幅度振动时的局部应力而采用较长的设计尺寸时,会导致磁路尺寸缩短,进而导致扬声器驱动力下降,扬声器的灵敏度不佳。
发明内容
本申请的目的在于提供了一种灵敏度较佳的电声换能器、扬声器模组及电子设备。
第一方面,本申请实施例提供一种电声换能器。电声换能器用于将电信号转换成声音信号。电声换能器包括中心磁铁、两个第一边磁铁、两个第二边磁铁、音圈、音膜以及两个柔性电路板。两个第一边磁铁对称地排布于中心磁铁的两侧,第一边磁铁与中心磁铁之间形成第一间隙。两个第二边磁铁对称地排布于中心磁铁的两侧,第二边磁铁位于第一边磁铁远离中心磁铁的一侧。音圈的一端部分位于第一间隙,音膜固接音圈的另一端。两个柔性电路板对称地排布于中心磁铁的两侧,柔性电路板位于第一边磁铁远离中心磁铁的一侧,且位于第二边磁铁与音膜之间,柔性电路板的两个枝节末端分别固接音圈的两个角。
相较于传统的将柔性电路板排布于边磁铁与中心磁铁的电声换能器,本实施例的电声换能器通过改变柔性电路板与第一边磁铁之间的相对位置关系,使得第一边磁铁与中心磁铁之间的间隙更窄,电声换能器的磁路的磁感应强度更高,有助于提高电声换能器的灵敏度。此外,电声换能器利用柔性电路板下方与的空间增加设置一对第二边磁铁,从而有效提高其磁路的磁感应强度,显著提升磁路的驱动力,使得电声换能器具有更佳的灵敏度。
一些实施例中,第一边磁铁与柔性电路板间隔设置。示例性的,在电声换能器的XY平面(也即电声换能器的长度方向和电声换能器的宽度方向所在平面)上,第一边磁铁与柔性电路板之间的间距在可以0.1毫米至0.5毫米的范围内。此时,柔性电路板随音圈振动时,与第一边磁铁之间不发生擦碰,从而保证柔性电路板的可靠性。
一些实施例中,第二边磁铁与柔性电路板间隔设置。在电声换能器的厚度方向上,柔 性电路板与第二边磁铁之间的间距可以在0.1毫米至0.7毫米的范围内。此时,柔性电路板随音圈振动时,与第二边磁铁之间不发生擦碰,从而保证柔性电路板的可靠性。
一种可选的实施例中,电声换能器还包括盆架。盆架的框体包括相背的第一面和第二面。音膜的周缘固定于框体的第一面。音圈位于框体内侧。两个柔性电路板均部分固定于框体的第二面。柔性电路板未固定于框体的部分可以随音圈相对框体振动。
在本实施例中,音膜及柔性电路板均固定于盆架的框体,使得两者的组装精度较高,音圈振动时,能够更好地同步带动固定于其上端的音膜和固定于其下端的柔性电路板,音圈发生滚振的几率较小,使得电声换能器具有较佳的音质。
示例性的,音膜的周缘可以通过粘接方式与盆架的框体的第一面相互固定。音膜的振动方向平行于电声换能器的厚度方向。框体的内侧空间形成下窄上宽的形状,使得音膜具有更大的振动空间,有利于音膜实现大幅度振动。
在一种实施例中,音膜包括振膜和球顶。球顶大致呈矩形板状。球顶包括相背设置的顶面和底面,球顶的顶面的周缘区域下凹形成限位槽。振膜大致呈矩形环状。振膜包括依次连接的第一固定部、振动部及第二固定部,第一固定部位于振动部的内侧,第二固定部位于振动部的外侧。振膜的第一固定部部分收容于球顶的限位槽,且与球顶相固定。振膜的第一固定部的底面接触球顶的限位槽的底壁。示例性的,振膜的第一固定部的顶面与球顶的顶面齐平。振膜的振动部的截面形状呈弧形或近似弧形,振动部的延伸轨迹呈圆角矩形。振膜的振动部下凹设置,也即振动部向远离振膜的第一固定部的顶面和第二固定部的顶面的方向凹陷。此时,振膜的振动部受外力时能够发生形变,使得第一固定部与第二固定部相对彼此移动、球顶与第二固定部相对彼此移动。
在本实施例中,由于振膜的振动部下凹设置,使得电声换能器能够节约其上部空间,而且在振膜受水压或气压影响发生变形后,容易恢复原状。
在另一种实施例中,音膜包括振膜和球顶。球顶大致呈矩形板状。球顶包括相背设置的顶面和底面,球顶的底面的周缘区域上凹形成限位槽。振膜大致呈矩形环状。振膜包括依次连接的第一固定部、振动部及第二固定部,第一固定部位于振动部的内侧,第二固定部位于振动部的外侧。振膜的第一固定部部分收容于球顶的限位槽,且与球顶相固定。振膜的第一固定部的顶面接触球顶的限位槽的底壁。示例性的,振膜的第一固定部的底面与球顶的底面齐平。振膜的振动部的截面形状呈弧形或近似弧形,振动部的延伸轨迹呈圆角矩形。振膜的振动部上凸设置,也即振动部向远离振膜的第一固定部的底面和第二固定部的底面的方向凸起。振膜的振动部受外力时能够发生形变,使得第一固定部与第二固定部相对彼此移动、球顶与第二固定部相对彼此移动。
在本实施例中,由于振膜的振动部上凸设置,释放了振膜下方的空间,允许位于振膜下方的磁路设置更大的高度尺寸,从而增加电声换能器的磁感应强度,提高电声换能器的灵敏度。
一种可选的实施例中,柔性电路板包括本体、第一枝节及第二枝节。本体固接框体的第二面。第一枝节包括首端、末端及连接于首端与末端之间的连接段。第二枝节包括首端、末端及连接于首端与末端之间的连接段。第一枝节的首端及第二枝节的首端均连接至本体的中部。第一枝节的末端固接音圈的一个角,第二枝节的末端固接音圈的另一个角。第一 枝节的首端及第二枝节的首端正对第二边磁铁设置。第一枝节及第二枝节与第二边磁铁及第一边磁铁间隔设置。
音圈振动时,第一枝节的末端和第二枝节的末端随音圈振动,从第一枝节的末端、第一枝节的连接段至第一枝节的首端,振幅逐渐减小,从第二枝节的末端、第二枝节的连接段至第二枝节的首端,振幅逐渐减小,第一枝节的首端及第二枝节的首端的振幅很小。在本实施例中,第二边磁铁正对第一枝节的首端及第二枝节的首端,从而能够较大的高度或者局部具有较大的高度,以增加电声换能器的磁路的磁感应强度。
一些实施例中,第一枝节的连接段靠近首端的部分可以正对第二边磁铁设置,第二枝节的连接段靠近首端的部分可以正对第二边磁铁设置。本体的中部也可以正对第二边磁铁设置。
在本实施例中,第二边磁铁正对第一枝节的首端、第二枝节的首端及本体的中部设置,因此第二边磁铁能够在电声换能器的长度方向上,充分利用柔性电路板下方的空间,从而具有较大的尺寸,以有效提升磁路的磁感应强度。
第二边磁铁正对振幅较小的第一枝节的首端及靠近首端的部分连接段、第二枝节的首端及靠近首端的部分连接段,因此第二边磁铁能够在电声换能器的宽度方向上,充分利用柔性电路板下方的空间,从而具有较大的尺寸,以有效提升磁路的磁感应强度。
示例性的,第一枝节的首端与第二枝节的首端相连接,两者拼接后连接至本体的中部。在其他一些实施例中,第一枝节的首端与第二枝节的首端分别连接至本体的中部的不同位置,两者之间形成间隙。
示例性的,柔性电路板的第一枝节及第二枝节对称设置。此时,音圈振动时,音圈与柔性电路板连接的两个位置受到的应力较为均匀,有利于音圈稳定振动。
一种可选的实施例中,第一枝节包括弯折段及直线段,弯折段的一端连接第一枝节的末端,弯折段的另一端连接直线段的一端,直线段的另一端连接第一枝节的首端,弯折段包括一节或多节弧线段,各弧线段朝远离中心磁铁方向凸起。
在本实施例中,由于弯折段的弧线段朝远离中心磁铁方向凸起,当音圈带动柔性电路板振动时,柔性电路板的形状能够更好地适应变形和位移需求,使得柔性电路板的可靠性更佳、使用寿命更长。此外,弯折段还能够充分利用音圈的角落的外侧空间,从而排布更长尺寸的走线,使得柔性电路板在随音圈大幅度振动时,应力较小,柔性电路板的可靠性更高。此外,在弯折部的长度满足需求,且占用空间较小时,靠近弯折部排布的本体的端部可以具有较大的面积,本体的端部既具有足够的面积与辅助振膜(见后文)相互固定,也具有足够的面积与电声换能器的外部结构相互固定。
一种可选的实施例中,音圈呈圆角矩形,第一枝节的末端固接音圈的一个圆角,各弧线段与连接第一枝节的音圈的圆角同轴设置。
在本实施例中,由于弯折段的弧线段与音圈的圆角同轴设置,当音圈带动柔性电路板振动时,柔性电路板的形状能够更好地适应变形和位移需求,使得柔性电路板的可靠性更佳、使用寿命更长。
其中,第一枝节的直线段的延伸方向可以大致平行于电声换能器的宽度方向。此时,直线段的长度较大,使得柔性电路板的长度较长,更易实现大振幅。并且,直线段对电声 换能器的长度方向占用的空间较小,有利于抑制柔性电路板对磁路的空间挤压,使得磁路具有更大的排布空间,以确保电声换能器的磁感应强度及敏感度。
其中,第一枝节的弯折段还包括多节过渡段,过渡段可以排布于相邻的弧线段之间,也可以排布于弧线段与直线段之间,也可以排布于弧线段与第一枝节的末端之间。
一种可选的实施例中,电声换能器还包括四个辅助振膜。四个辅助振膜彼此间隔地排布于两个柔性电路板远离音圈的一侧。四个辅助振膜的一端分别固接两个柔性电路板的第一枝节的末端及第二枝节的末端,各辅助振膜的另一端固接至相邻的柔性电路板的本体的一端。各辅助振膜的两端能够相对彼此移动。
在本实施例中,电声换能器包括两个顺性系统,音膜为位于音圈上部的第一顺性系统,柔性电路板及辅助振膜为位于音圈下部的第二顺性系统,两个顺性系统随音圈振动,能够抑制音圈滚振,有助于确保电声换能器的具有较佳音质。
示例性的,辅助振膜大致呈扇形。辅助振膜包括依次连接的第一固定部、振动部及第二固定部,第一固定部位于振动部内侧,第二固定部位于振动部的外侧。第一固定部固接柔性电路板的枝节末端,第二固定部固接柔性电路板的本体的一端。辅助振膜的振动部的截面形状呈弧形或近似弧形,振动部的延伸轨迹呈弧形。辅助振膜的振动部下凹设置,也即振动部向远离第一固定部的顶面和第二固定部的顶面的方向凹陷。辅助振膜的第一固定部呈扇形。辅助振膜的第二固定部远离第一固定部的一侧形成缺口。辅助振膜的振动部受外力时能够发生形变,使得第一固定部与第二固定部相对彼此移动。
示例性的,辅助振膜固定于柔性电路板的一端露出部分柔性电路板。换言之,柔性电路板的本体的端部可以经辅助振膜的第二固定部的缺口露出。柔性电路板的本体的端部相对辅助振膜外露的区域可以用于连接电声换能器的其他部件。
示例性的,辅助振膜的振动部的延伸轨迹与连接辅助振膜的音圈的圆角同轴设置。在本实施例中,当辅助振膜的第一固定部随音圈振动时,辅助振膜的振动部的形状能够更好地适应变形和位移需求,使得辅助振膜的可靠性更佳、使用寿命更长。此外,由于柔性电路板的枝节的弯折段的弧线段也与音圈的圆角同轴设置,因此柔性电路板的枝节的弯折段及辅助振膜的振动部,在随音圈振动的过程中,形变趋势相似,能够降低两者之间发生碰撞的风险,使得电声换能器的可靠性更高。
一种可选的实施例中,在中心磁铁的厚度方向上,第一边磁铁的高度大于第二边磁铁的高度。中心磁铁的厚度方向平行于电声换能器的厚度方向。
在本实施例中,由于第一边磁铁与柔性电路板在电声换能器的厚度方向上无堆叠关系,因此第一边磁铁的高度可以大于第二边磁铁的高度,以充分利用空间、提高磁路的磁感应强度,使得电声换能器的灵敏度较佳。
一些实施例中,在电声换能器的厚度方向上,第一边磁铁的高度可以大于第二边磁铁的高度、柔性电路板的高度及第二边磁铁与柔性电路板的间距的和。
一种可选的实施例中,第二边磁铁包括相背设置的第一表面和第二表面,第一表面朝向柔性电路板。第一表面包括第一平面、第一倾斜面及第二倾斜面,第一平面与第二表面平行,第一倾斜面的一端连接第一平面的一端,第一倾斜面的另一端向靠近第二表面的方向延伸,第二倾斜面的一端连接第一平面的另一端,第二倾斜面的另一端向靠近第二表面 的方向延伸。
在本实施例中,第二边磁铁为中间高、两边高度逐渐减小的结构,中间高的位置可以正对柔性电路板振幅小的部分,两边高度逐渐减小的位置可以正对柔性电路板振幅逐渐增大的部分,从而既能够充分预留柔性电路板的振动空间,还能够充分利用不干涉高度、提高磁铁尺寸,以使电声换能器的磁感应强度更高。示例性的,第二边磁铁在电声换能器的宽度方向上的尺寸可以在2毫米至10毫米范围内。
示例性的,第一平面正对第一枝节的首端和第二枝节的首端。其中,第一平面还可以正对柔性电路板的振幅较小的其他部分,例如第一枝节的连接段靠近首端的部分和第二枝节的连接段靠近首端的部分。此时,第二边磁铁具有更大的体积,能够增加电声换能器的磁感应强度。
示例性的,第二倾斜面与第一倾斜面可以对称设置,且对称平面垂直于第二表面。由于柔性电路板的第一枝节与第二枝节是对称设置的,且两者的振动幅度是对称的,故而对称设置的第二倾斜面及第一倾斜面能够更好地与第一枝节及第二枝节的振动情况相匹配。
在一些实施例中,第一边磁铁与第二边磁铁为分体设计,两者可以通过粘接相邻面相互固定。由于第二边磁铁与第一边磁铁在YZ平面(也即电声换能器的宽度方向和厚度方向所在平面)的形状不同,因此分别成型后再通过组装方式形成一体式结构,能够降低成本,使得电声换能器的成本更低。
在其他一些实施例中,第一边磁铁与第二边磁铁也可以为一体成型的异形磁铁。
一种可选的实施例中,第二边磁铁、第一边磁铁及中心磁铁排布于第一方向。第一边磁铁在第二方向上的尺寸为第一宽度,第二方向垂直于第一方向及中心磁铁的厚度方向,第二边磁铁在第二方向上的尺寸为第二宽度,第二宽度小于第一宽度。
在本实施例中,第二边磁铁在电声换能器的宽度方向上的宽度较小,第二边磁铁正对柔性电路板振幅小的部分,例如,第一枝节的首端和第二枝节的首端;第二边磁铁在电声换能器的宽度方向上的两侧空间可以作为柔性电路板的振动空间,正对柔性电路板振幅较大的部分,例如第一枝节的连接段和第二枝节的连接段。
其中,第二边磁铁还可以正对柔性电路板的振幅较小的其他部分,例如第一枝节的连接段靠近首端的部分和第二枝节的连接段靠近首端的部分,以具有更大的体积。
在一些实施例中,可以在满足第一枝节和第二枝节的振动空间需求的情况下,适当增加第二边磁铁的第二宽度,或者,降低第二边磁铁的高度并较大幅度地增加第二边磁铁的第二宽度(此时,第二宽度可以等于或大于第一边磁铁的第一宽度),以使第二边磁铁的体积更大。
一种可选的实施例中,第二边磁铁的第一表面平行于第二表面。第一表面正对柔性电路板的第一枝节的首端和第二枝节的首端。第二边磁铁还包括第一侧面和第二侧面,第一侧面连接第一表面的一端与第二表面的一端,第二侧面连接第一表面的另一端与第二表面的另一端。第一侧面正对第一枝节的连接段,第二侧面正对第二枝节的连接段。
在本实施例中,第二边磁铁充分利用柔性电路板下方的空间,以使电声换能器具有更高的磁感应强度。
一种可选的实施例中,第一边磁铁与第二边磁铁一体成型,有利于简化电声换能器的 组装工序,提高组装精度。
一种实施例中,第二边磁铁、第一边磁铁及中心磁铁排布于第一方向。第一边磁铁的横截面形状与第二边磁铁的横截面形状相同,第一边磁铁的横截面及第二边磁铁的横截面均垂直于第一方向。此时,第二边磁铁的横截面可以为异形,以在预留柔性电路板的振动空间的情况下,尽量具有较大的面积,以使第二边磁铁和第一边磁铁的体积较大。
另一种实施例中,第二边磁铁、第一边磁铁及中心磁铁排布于第一方向。在中心磁铁的厚度方向上,第一边磁铁的高度与第二边磁铁的高度相同,第一边磁铁在第二方向上的尺寸为第一宽度,第二方向垂直于第一方向及中心磁铁的厚度方向,第二边磁铁在第二方向上的尺寸为第二宽度,第二宽度小于第一宽度。此时,第二边磁铁和第一边磁铁的形状可以呈较为规则的长方体,以降低加工难度和成本。
一种可选的实施例中,第二边磁铁包括第一磁部和第二磁部,第一磁部位于第二磁部与第一边磁铁之间。第二磁部正对柔性电路板的本体设置,第一磁部正对柔性电路板的第一枝节的首端及第二枝节的首端设置,第一磁部还可以正对第一枝节的连接段靠近首端的部分及第二枝节的连接段靠近首端的部分设置。
其中,第一磁部在电声换能器的长度方向上的长度相较于前述实施例的第二边磁铁较短,第一磁部的其他结构及参数设计可参阅前述实施例的第二边磁铁。
其中,在电声换能器的厚度方向上,第二磁部的高度大于第一磁部的高度,第二磁部的高度小于第一边磁铁的高度。示例性的,在电声换能器中,第二磁部的顶面可以与柔性电路板的本体相接触,以充分利用柔性电路板下方的空间。
其中,第一磁部与第二磁部可以一体成型,也可以通过组装(例如粘接)形成一体化结构。
一种可选的实施例中,柔性电路板包括本体、第一枝节及第二枝节。本体固接框体的第二面,第一枝节的首端及第二枝节的首端分别连接本体的两个端部,第一枝节的末端固接音圈的一个角,第二枝节的末端固接音圈的另一个角。
在本实施例中,由于柔性电路板的第一枝节与第二枝节连接于本体的两个端部,因此本体的中部的内侧空间得以释放,相较于前述实施例,本实施例电声换能器能够在其长度方向上,压缩第二边磁铁的长度、增加第一边磁铁的长度,使得磁路的磁感应强度更大。示例性的,在电声换能器的长度方向上,第一边磁铁的长度可以大于第二边磁铁的长度。
一种可选的实施例中,在中心磁铁的厚度方向上,第一边磁铁的高度大于第二边磁铁的高度。中心磁铁的厚度方向平行于电声换能器的厚度方向。
在本实施例中,由于第一边磁铁与柔性电路板在电声换能器的厚度方向上无堆叠关系,因此第一边磁铁的高度可以大于第二边磁铁的高度,以充分利用空间、提高磁路的磁感应强度,使得电声换能器的灵敏度较佳。
示例性的,第一边磁铁呈长方体,第二边磁铁呈长方体。在电声换能器的厚度方向上,第一边磁铁的高度可以大于第二边磁铁的高度。在电声换能器的宽度方向上,第二边磁铁的宽度可以大于第一边磁铁的宽度。
一种可选的实施例中,盆架还包括多个支脚。多个支脚彼此间隔地固定于框体的第二面。电声换能器还包括下极片,下极片固接多个支脚且与框体间隔设置。中心磁铁、两个 第一边磁铁及两个第二边磁铁均固定于下极片朝向框体的一侧。
在本实施例中,电声换能器通过多个支脚支撑于框体与下极片之间,多个支脚不仅能够起到支撑、连接作用,而且占用的框体与下极片之间的空间很小,使得框体与下极片之间形成较大的磁路排布空间,磁路可以充分利用该空间排布磁铁,以使电声换能器的磁感应强度较高、灵敏度较佳。
此外,下极片作为导磁件,既可以封闭磁场,降低电声换能器的磁场对周边环境的不良影响,而且可以作为承载件,用于固定中心磁铁、两个第一边磁铁及两个第二边磁铁,使得多个磁铁之间的相对位置关系稳定、可靠,使得电声换能器的可靠性较高。
一种可选的实施例中,电声换能器还包括中心极片以及边极片。中心极片固定于中心磁铁远离下极片的一侧。边极片固定于框体的内侧,且与柔性电路板间隔设置。边极片包括第一极片部,第一极片部正对第一边磁铁及第二边磁铁设置。第一极片部与中心极片之间形成第二间隙,第二间隙连通第一间隙。音圈部分位于第二间隙。
示例性的,柔性电路板的本体与边极片可以在电声换能器的厚度方向上彼此间隔地堆叠设置,固定于盆架的柔性电路板的本体及边极片由盆架的部分结构隔开。例如,框体的内侧形成固定槽,该固定槽环绕框体的内侧空间设置。固定槽的开口位于框体的内侧面,固定槽向靠近外侧面的方向凹陷。边极片的连接框部可以卡入框体的固定槽,连接框部部分位于固定槽内、部分位于固定槽外,边极片的第一极片部及第二极片部位于固定槽外。
一些实施例中,第一极片部大致呈T形,第一极片部包括第一部分和第二部分,第二部分连接第一部分与连接框部。第一极片部的第二部分的两侧形成避让间隙,避让间隙位于第一极片部的第一部分与连接框部之间。连接框部内侧的四个角落形成角落间隙。角落间隙连通相邻的避让间隙。
其中,第一极片部的第一部分正对第一边磁铁设置,第一极片部的第二部分正对第二边磁铁设置,边极片的连接框部连接第一极片部的第二部分的直边部分正对第二边磁铁设置。第一极片部的第一部分与第一边磁铁之间可以通过粘接实现固定。第一极片部的第二部分及连接框部与第二边磁铁之间形成间隙。第一极片部与中心极片之间形成第二间隙,第二间隙连通第一间隙。
柔性电路板的第一枝节的首端正对边极片的第一极片部的第二部分,第一枝节的首端与第一极片部的第二部分在电声换能器的厚度方向上彼此间隔。第一枝节的连接段和末端正对位于第一极片部的第二部分一侧的避让间隙和角落间隙。由于第一枝节在音圈的带动下振动时,第一枝节的振幅由末端向首端逐渐减小,第一枝节的首端的振幅很小、或者不振动,因此第一枝节能够充分利用边极片的间隙进行振动,且振动时不会与边极片发生擦碰,有利于提高电声换能器的可靠性。
柔性电路板的第二枝节的首端正对边极片的第一极片部的第二部分,第二枝节的首端与第一极片部的第二部分在电声换能器的厚度方向上彼此间隔。第二枝节的连接段和末端正对位于第一极片部的第二部分另一侧的避让间隙和角落间隙。由于第二枝节在音圈的带动下振动时,第二枝节的振幅由末端向首端逐渐减小,第二枝节的首端的振幅很小、或者不振动,因此第二枝节能够充分利用边极片的间隙进行振动,且振动时不会与边极片发生擦碰,有利于提高电声换能器的可靠性。
一种可选的实施例中,电声换能器还包括两个第三边磁铁,两个第三边磁铁固定于下极片朝向框体的一侧,且对称地排布于中心磁铁的另外两侧,第三边磁铁与中心磁铁之间形成第三间隙。边极片还包括第二极片部,第二极片部正对第三边磁铁,第二极片部与中心极片之间形成第四间隙,第四间隙连通第三间隙,音圈部分位于第四间隙、部分位于第三间隙。
一些实施例中,第三边磁铁与柔性电路板间隔设置。示例性的,第三边磁铁的两端靠近柔性电路板的枝节末端,第三边磁铁的两端端面部分凹陷以形成避让区,避让区连通第三间隙,柔性电路板的枝节末端部分位于避让区,且与避让区的壁面之间形成间隙。
一些实施例中,边极片的连接框部连接第二极片部的直边部分正对第三边磁铁设置。此时,第三边磁铁充分利用边极片与下极片之间的空间,以在电声换能器的宽度方向上具有更大的尺寸,使得磁路的磁感应强度更高。
一种可选的实施例中,电声换能器还包括连接框,连接框位于音圈与音膜之间,且连接框的一端固接音圈,连接框的另一端固接音膜。
在本实施例中,连接框将音圈与音膜隔离,使得音膜远离音圈,同时连接框可以对音圈起到散热作用,从而降低因音圈过热而对音膜造成损伤的风险。此外,音圈通过连接框连接音膜,因此音圈远离音膜的端部与音膜之间的间距较大,使得音圈能够充分插入磁路,磁路产生的磁场有效地作用于音圈,而且音膜与磁路之间的间距较大,音膜的振动空间较大,有助于音膜实现大幅度振动。
示例性的,连接框的截面形状大致呈Z形,连接框的延伸轨迹呈圆角矩形。连接框包括本部、外延部及内延部。外延部连接于本部的底面,向本部的外侧延伸。外延部的底面面积大于本部的底面面积,以增加连接框与其他部件的连接面积。内延部连接于本部的顶面,向本部的内侧延伸。内延部的顶面面积大于本部的顶面面积,以增加连接框与其他部件的连接面积。
在本实施例中,连接框的两端端面(也即外延部的底面和内延部的顶面)面积较大,使得连接框与外部结构连接面积较大,连接关系更为稳固。其中,连接框可以一体成型。
在其他一些实施例中,连接框的截面形状也可以是竖直的“一”形、L形、倒L形、T形、倒T形、“匸”形等。
第二方面,本申请实施例还提供一种扬声器模组。扬声器模组包括模组上壳及上述任一项的电声换能器。电声换能器作为扬声器模组的扬声器内核。电声换能器固接模组上壳,音膜与模组上壳之间形成前音腔。模组上壳设有出音孔,出音孔连通前音腔与扬声器模组的外部。
在本实施例中,由于电声换能器的磁场强度较高、灵敏度较佳,使得扬声器模组的音量更大,以具有更广的适用范围。
一种可选的实施例中,扬声器模组还包括模组下壳,模组下壳与模组上壳相固定,电声换能器位于模组下壳与模组上壳内侧,音膜背离前音腔的一侧形成后音腔,模组下壳设有泄露孔,泄露孔连通后音腔与扬声器模组的外部。
在本实施例中,扬声器模组通过模组下壳与模组上壳封盖成模块化结构,模组下壳与模组上壳既能够充分保护位于其内侧的电声换能器,也有利于简化扬声器模组与其他部件 的组装结构。
其中,扬声器模组还包括缓冲件,缓冲件固定于模组下壳与电声换能器之间,以使电声换能器与模组上壳稳固连接,避免电声换能器发生晃动的风险,使得扬声器模组的可靠性更高。
第三方面,本申请实施例还提供一种电子设备。电子设备包括壳体及上述任一项的扬声器模组,扬声器模组收容于壳体的内部,壳体设有扬声孔,扬声孔连通出音孔与电子设备的外部。
在本实施例中,扬声器模组能够发出较大的音量,使得电子设备的声音播放性能更佳,有助于提高用户体验。
第四方面,本申请实施例还提供一种电子设备。电子设备包括壳体、显示模组及受话器。显示模组包括盖板及显示面板,盖板固定于壳体,显示面板固定于盖板朝向壳体的内表面。受话器收容于壳体的内部,受话器为上述任一项的电声换能器。盖板设有受话孔,或者,盖板的边缘与壳体之间形成受话孔,或者,壳体设有受话孔。受话器发出的声音经受话孔传输至电子设备的外部。
在本实施例中,由于电声换能器的磁场强度较高、灵敏度较佳,因此采用该电声换能器的听筒能够发出较大的音量,使得电子设备的声音播放性能更佳,有助于提高用户体验。
附图说明
图1是本申请实施例提供的一种电子设备的结构示意图;
图2是图1所示电子设备的扬声器模组的结构示意图;
图3是图2所示扬声器模组的分解示意图;
图4是图3所示扬声器模组在另一角度的结构示意图;
图5是图2所示扬声器模组沿A-A处剖开的结构示意图;
图6是图2所示扬声器模组沿B-B处剖开的结构示意图;
图7是图2所示扬声器模组在另一种实施例中沿A-A处剖开的结构示意图;
图8是图2所示扬声器模组的部分结构示意图;
图9是图3所示电声换能器的结构图;
图10是图9所示电声换能器的部分分解示意图;
图11是图10所示盆架沿C-C处剖开的结构示意图;
图12是图11所示振动组件的分解示意图;
图13是图12所示音膜的分解示意图;
图14是图12所示音膜沿D-D处剖开的结构示意图;
图15是图12的音膜在另一实施例中的结构示意图;
图16是图15所示音膜沿E-E处剖开的结构示意图;
图17是图12所示连接框沿F-F处剖开的结构示意图;
图18是图10所示振动组件沿G-G处剖开的结构示意图;
图19是图10所示振动组件在另一角度的结构示意图;
图20是图10所示振动组件的柔性电路板与音圈的组装结构示意图;
图21是图10所示振动组件的辅助振膜、柔性电路板及音圈的组装结构示意图;
图22是图10所示磁路组件的分解示意图;
图23是图10所示磁路组件的部分结构示意图;
图24是图10所示磁路组件沿H-H处剖开的结构示意图;
图25是图10所示磁路组件沿I-I处剖开的结构示意图;
图26是图9所示电声换能器沿J-J处剖开的结构示意图;
图27是图9所示电声换能器沿K-K处剖开的结构示意图;
图28是图9所示电声换能器的边极片与盆架的组装结构示意图;
图29是图26所示磁路组件及音圈的示意图;
图30是图27所示磁路组件与音圈的示意图;
图31是图9所示电声换能器的部分结构示意图;
图32是图9所示电声换能器的另一部分结构示意图;
图33是图9所示电声换能器沿L-L处剖开的结构示意图;
图34是图32所示第一边磁铁及第二边磁铁的结构示意图;
图35是图32的第一边磁铁及第二边磁铁在另一种实施例中的结构示意图;
图36是图35所示第一边磁铁和第二边磁铁与柔性电路板的位置关系示意图;
图37是图32的第一边磁铁及第二边磁铁在再一种实施例中的结构示意图;
图38是图37所示第一边磁铁和第二边磁铁与柔性电路板的位置关系示意图;
图39是图32的第一边磁铁及第二边磁铁在再一种实施例中的结构示意图;
图40是图39所示第一边磁铁和第二边磁铁与柔性电路板的位置关系示意图;
图41是图32的第一边磁铁及第二边磁铁在再一种实施例中的结构示意图;
图42是图32的第一边磁铁及第二边磁铁在再一种实施例中的结构示意图;
图43是图42所示第一边磁铁和第二边磁铁与柔性电路板的位置关系示意图;
图44是图32的柔性电路板、第一边磁铁及第二边磁铁在再一种实施例中的结构示意图;
图45是图44所示第一边磁铁和第二边磁铁的结构示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请以下各个实施例进行描述。
本申请实施例提供一种电声换能器,电声换能器用于将电信号转换成声音信号。该电声换能器通过优化磁路组件和柔性电路板的结构,以保证磁路组件的驱动力,使得电声换能器的灵敏度较佳。本申请实施例还提供一种包括该电声换能器的电子设备。电子设备可以是手机、平板电脑、笔记本电脑、可穿戴设备、随身听等具有声音播放功能的产品。可穿戴设备可以是智能手环、智能手表、智能头显、智能眼镜等。示例性的,电声换能器可以作为扬声器模组(也称为喇叭)的扬声器内核应用于电子设备,也可以作为受话器(也称为听筒)应用于电子设备。
请参阅图1,图1是本申请实施例提供的一种电子设备1000的结构示意图。图1所示电子设备1000以手机为例进行说明。
电子设备1000包括壳体100、显示模组200、受话器300、摄像模组500、扬声器模组600、第一电路板700、第二电路板800及电池900。
壳体100包括边框1001和后盖1002,边框1001连接后盖1002的周缘。边框1001与后盖1002可以是一体成型结构,也可以通过组装方式形成一体式结构。壳体100设有扬声孔1003。扬声孔1003的数量可以为一个或多个。示例性的,扬声孔1003的数量为多个,多个扬声孔1003设于边框1001。扬声孔1003连通电子设备1000的内部与电子设备1000的外部。
显示模组200包括盖板2001和显示面板2002。盖板2001固定于壳体100,例如盖板2001固定于边框1001远离后盖1002的一侧。显示面板2002固定于盖板2001朝向后盖1002的内表面。盖板2001用于保护显示面板2002,显示面板2002用于显示图像,显示面板2002还可以集成触摸功能。盖板2001设有透光部2003和受话孔2004。透光部2003允许光线穿过的区域,示例性的,盖板2001的油墨层在透光部2003镂空设置。受话孔2004为贯穿盖板2001的通孔。显示面板2002在盖板2001上的投影与透光部2003及受话孔2004错开设置。
在其他一些实施例中,盖板2001的边缘与壳体100之间形成受话孔。例如,盖板2001位于电子设备1000顶部的边缘、与壳体100的边框1001位于电子设备1000顶部的边缘之间形成受话孔。在其他一些实施例中,壳体100设有受话孔。例如,壳体100的边框1001位于电子设备1000顶部的区域处形成受话孔。本申请不对受话孔的具体形成结构及位置做严格限定。
受话器300收容于壳体100的内部。受话器300位于显示模组200与后盖1002之间。受话器300发出的声音经受话孔2004传输至电子设备1000的外部,以实现电子设备1000的声音播放功能。示例性的,受话器300可以采用后文实施例中描述的电声换能器。其他实施例中,受话器300也可以采用其他结构的电声换能器。
摄像模组500收容于壳体100的内部。摄像模组500位于显示模组200与后盖1002之间。摄像模组500经盖板2001的透光部2003采集光线,以进行拍摄。其中,电子设备1000还可以包括另一收容于壳体100的内部的摄像模组,后盖1002可以设置拍摄通孔,另一摄像模组可通过拍摄通孔采集光线,以进行拍摄。
扬声器模组600收容于壳体100内。扬声器模组600位于显示模组200与后盖1002之间。扬声器模组600发出的声音能够经扬声孔1003传输至电子设备1000的外部,以实现电子设备1000的声音播放功能。扬声器模组600包括扬声器内核,扬声器内核可以采用后文实施例描述的电声换能器。其他实施例中,扬声器内核也可以采用其他结构的电声换能器。
第一电路板700、第二电路板800及电池900均收容于壳体100内部。第一电路板700与第二电路板800分别位于电池900的两侧,例如第一电路板700位于电子设备1000的顶部,电池900位于电子设备1000的中部,第二电路板800位于电子设备1000的底部。第一电路板700及第二电路板800上可以固定有多个器件。器件包括但不限于处理器、存储器等。显示模组200、摄像模组500、扬声器模组600及受话器300等电子设备1000的功能模组耦合处理器。本申请不对第一电路板700及第二电路板800上固定的具体器件进行严格限定。第一电路板700与第二电路板800之间可以通过柔性电路板、同轴线等导线连接,以实现彼此之间的电连接。电池900用于为电子设备1000供电。其他实施例中,电子 设备1000也可以省去第一电路板700或第二电路板800,并将需要固定于电路板的器件固定在保留的电路板上。
请参阅图2,图2是图1所示电子设备1000的扬声器模组600的结构示意图。
扬声器模组600包括电声换能器10、模组上壳20、模组下壳30以及电路板40。模组上壳20与模组下壳30彼此固定,以形成音箱。电声换能器10位于音箱内部。电路板40的一端位于音箱内部,以连接电声换能器10。电路板40的另一端位于音箱外部,以电连接电声换能器10与扬声器模组600的外部器件。示例性的,电路板40位于音箱外部的一端可以固定并电连接至第二电路板800。
模组上壳20设有出音孔201,出音孔201连通音箱内部与音箱外部。电声换能器10发出的声音能够经出音孔201传输至音箱外部。结合参阅图1和图2,壳体100的扬声孔1003连通电声换能器10的出音孔201与电子设备1000的外部,电声换能器10发出的声音能够经出音孔201和扬声孔1003传输至电子设备1000的外部。
请一并参阅图3和图4,图3是图2所示扬声器模组600的分解示意图,图4是图3所示扬声器模组600在另一角度的结构示意图。
模组上壳20包括相背设置的顶面202和底面203、以及连接在顶面202与底面203之间的周侧面204。出音孔201的开口设于模组上壳20的周侧面204。模组上壳20还具有定位槽205、第一缺口206及容纳槽207。定位槽205的开口设于模组上壳20的底面203。第一缺口206自定位槽205的侧壁贯穿至模组上壳20的周侧面204,且延伸至模组上壳20的底面203。容纳槽207的开口设于定位槽205的底壁2051。容纳槽207的底壁2071凸设有第一凸起2072和第二凸起2073。第一凸起2072可以大致呈U形排布,以形成一环绕区域2076,该环绕区域2076连通出音孔201。容纳槽207的侧壁2074凸设有第三凸起2075,第三凸起2075连接第一凸起2072的两端。第二凸起2073可以包括连续的完整凸条,也可以包括断开的多个凸条。第二凸起2073的一端靠近第一凸起2072设置,另一端靠近第一缺口206设置。可以理解的是,本申请实施例的扬声器模组600所采用“顶”“底”等方位用词主要依据扬声器模组600于附图3中的展示方位进行阐述,并不形成对扬声器模组600于实际应用场景中的方位的限定。
电声换能器10包括盆架1及固定于盆架1的音膜2。电声换能器10通过音膜2振动发出声音。电路板40可以采用柔性电路板。电路板40的其中一端包括两个分支,两个分支的末端能够形成连接端。
模组下壳30包括基板301及限位凸条302。基板301包括相背设置的顶面303和底面304、以及连接在顶面303与底面304之间的周侧面305。限位凸条302固定于基板301的顶面303,且沿基板301的顶面303的周缘环绕设置。限位凸条302上可设置第二缺口3021,第二缺口3021自限位凸条302的顶面3022向靠近基板301的顶面303的方向凹陷,且连通限位凸条302的内侧空间与外侧空间。模组下壳30与模组上壳20组装后,第二缺口3021与正对第一缺口206,以拼接成一个口径较大的缺口。在其他一些实施例中,模组下壳30也可以省去第二缺口3021。
基板301设有连通槽3011和泄露孔3012。连通槽3011的开口设于基板301的底面304,且延伸至基板301的周侧面305。泄露孔3012的两端开口分别设于连通槽3011的底壁3013 和基板301的顶面303,泄露孔3012连通基板301的顶侧空间与连通槽3011、基板301的底侧空间、及基板301的周侧空间。在其他一些实施例中,基板301的泄露孔3012自基板301的底面304贯穿至基板301的顶面303,基板301不设置连通槽3011。
请一并参阅图5和图6,图5是图2所示扬声器模组600沿A-A处剖开的结构示意图,图6是图2所示扬声器模组600沿B-B处剖开的结构示意图。本申请附图中,沿“A-A处剖开”是指沿A-A线及A-A线两端箭头所在的平面剖开,沿“B-B处剖开”是指沿B-B线及B-B线两端箭头所在的平面剖开。后文中对附图的说明做相同理解。
模组下壳30盖合于模组上壳20,模组下壳30的基板301的顶面303接触模组上壳20的底面203,模组下壳30的限位凸条302卡入模组上壳20的定位槽205,限位凸条302与定位槽205之间形成凹凸配合结构,以使模组下壳30与模组上壳20相对固定。模组下壳30和模组上壳20共同围设出音腔空间6001。
电声换能器10收容于音腔空间6001。也即,电声换能器10位于模组下壳30和模组上壳20内侧。模组上壳20固接电声换能器10的盆架1。盆架1部分卡入环绕区域2076(如图4所示),第一凸起2072和第三凸起2075连续地抵持盆架1的四周。电声换能器10的音膜2位于环绕区域2076。音膜2将音腔空间6001分隔成前音腔6002和后音腔6003。模组上壳20与音膜2之间形成前音腔6002。也即,模组上壳20的容纳槽207的底壁2071、第一凸起2072、音膜2及第三凸起2075共同包围形成前音腔6002。出音孔201连通前音腔6002与扬声器模组600的外部。后音腔6003位于音膜2远离前音腔6002的一侧。后音腔6003经泄露孔3012及连通槽3011连通至扬声器模组600的外部。
请参阅图7,图7是图2所示扬声器模组600在另一种实施例中沿A-A处剖开的结构示意图。
扬声器模组600还可以包括缓冲件50。缓冲件50固定于模组下壳30的基板301的顶面303,缓冲件50位于限位凸条302的内侧。缓冲件50远离基板301的一侧抵持电声换能器10,以使电声换能器10与模组上壳20稳固连接,避免电声换能器10发生晃动的风险,使得扬声器模组600的可靠性更高。
请参阅图8,图8是图2所示扬声器模组600的部分结构示意图。
电路板40的一端位于模组上壳20的内部,另一端经第一缺口206伸出至模组上壳20外部。电路板40位于模组上壳20内部的部分搭设在第二凸起2073上,示例性的,电路板40位于模组上壳20内部的部分固接(例如粘接)于第二凸起2073的端面。此时,电路板40稳定固定于模组上壳20,能够降低因晃动而发生损坏的风险。电路板40的两个分支的端部分别固定于电声换能器10的两个角落,以电连接电声换能器10。
可以理解的是,扬声器模组600的模组上壳20、模组下壳30及电路板40的结构及形状也可以依据其实际需求(例如安装环境要求、使用场景需求等)设计成其他方案。
请一并参阅图9和图10,图9是图3所示电声换能器10的结构图,图10是图9所示电声换能器10的部分分解示意图。本申请实施例中,示意X方向为电声换能器10的长度方向,Y方向为电声换能器10的宽度方向,Z方向为电声换能器10的厚度方向。可以理解的是,本申请实施例的电声换能器10所采用“顶”“底”等方位用词主要依据电声换能器10于附图9中的展示方位进行阐述,并不形成对电声换能器10于实际应用场景中的方位 的限定。
在本申请实施例中,电声换能器10的多个部件是对称设置的,两个部件对称设置即为两个部件相对某个基准面呈轴对称关系,允许由于制作公差、组装公差等产生的稍许偏差。其中,部分部件可以相对第一基准面对称,部分部件可以相对第二基准面对称,第二基准面与第一基准面相交。示例性的,如图9所示,第一基准面可以经过K-K线且平行于YZ平面,YZ平面为电声换能器10的宽度方向Y和电声换能器10的厚度方向Z所在平面;第二基准面可以经过J-J线且平行于XZ平面,XZ平面为电声换能器10的长度方向X和电声换能器10的厚度方向Z所在平面。
电声换能器10包括支撑组件10a、振动组件10b及磁路组件10c。支撑组件10a包括前述盆架1。振动组件10b及磁路组件10c安装于盆架1。振动组件10b的各部件中固定于盆架1的部分相对盆架1不动,其余部分可以相对盆架1振动。磁路组件10c相对盆架1固定,磁路组件10c用于为振动组件10b提供驱动磁场。
请一并参阅图10和图11,图11是图10所示盆架1沿C-C处剖开的结构示意图。
盆架1包括框体11及多个支脚12。框体11大致为矩形框架。框体11包括相背的第一面111和第二面112,多个支脚12彼此间隔地固定于第二面112。本申请实施例中,两个部件之间彼此间隔或间隔设置,是指这两个部件之间存在间隙。多个支脚12的数量可以为四个,两两对称地固定于框体11的两个侧边。多个支脚12可以相对第一基准面对称,也可以相对第二基准面对称。
框体11还包括相背设置的内侧面113和外侧面114,内侧面113和外侧面114连接在第一面111与第二面112之间。示例性的,内侧面113相对外侧面114倾斜设置,内侧面113与外侧面114的间距在靠近第一面111的方向上递减,使得框体11的内侧空间能够形成下窄上宽的形状。框体11的内侧形成固定槽115,该固定槽115环绕框体11的内侧空间设置。固定槽115的开口位于框体11的内侧面113,固定槽115向靠近外侧面114的方向凹陷。
示例性的,盆架1还包括两个限位块13,两个限位块13对称地固定于框体11的两个侧边的内侧。两个限位块13相对第二基准面对称。限位块13包括限位条131和至少一个限位脚132。限位条131固定于框体11的内侧面113,限位条131的底面与固定槽115的侧壁共面设置。至少一个限位脚132固定于限位条131的底面且伸入固定槽115。示例性的,限位条131包括连接其底面与固定槽115的侧壁的侧表面,限位条131的侧表面相对框体11的内侧面113倾斜设置。
示例性的,盆架1为一体成型结构。在其他一些实施例中,盆架1的各部分结构也可以通过组装方式(例如粘接、卡接)形成一体化结构。
可以理解的是,电声换能器10的盆架1用于固定和支撑电声换能器10的其他部件,在满足该需求的情况下,盆架1也可以有其他设计形状,不限于本实施例。
请参阅图12,图12是图11所示振动组件10b的分解示意图。
电声换能器10的振动组件10b包括音膜2、连接框3、音圈4、两个柔性电路板5以及四个辅助振膜6。音圈4呈圆角矩形。也即,音圈4包括四个直边41和四个圆角42,相邻的两个直边41之间连接有一个圆角42。音膜2、连接框3、两个柔性电路板5以及四个 辅助振膜6的形状依据音圈4的形状进行设计。可以理解的是,本申请不对音圈4的相邻两个直边41的长度关系进行严格限定,其中一个直边41的长度可以大于、等于或小于相邻的另一个直边41的长度。在本实施例中,音圈4插入磁路组件10c,磁路组件10c提供驱动音圈4振动的磁场,当音圈4通电时,音圈4带动振动组件10b的其他部件振动。
在其他一些实施例中,音圈4也可以呈矩形,后文对音圈4的圆角42的描述对应于音圈4的四个角。当然,音圈4也可以有其他形状,本申请对音圈4的具体形状不作严格限定。
请一并参阅图13和图14,图13是图12所示音膜2的分解示意图,图14是图12所示音膜2沿D-D处剖开的结构示意图。
音膜2包括振膜21和球顶22。球顶22大致呈矩形板状。球顶22包括相背设置的顶面221和底面222,球顶22的顶面221的周缘区域下凹形成限位槽223。振膜21大致呈矩形环状。振膜21包括依次连接的第一固定部211、振动部212及第二固定部213,第一固定部211位于振动部212的内侧,第二固定部213位于振动部212的外侧。振膜21的第一固定部211部分收容于球顶22的限位槽223,且与球顶22相固定。振膜21的第一固定部211的底面2112接触球顶22的限位槽223的底壁2231。示例性的,振膜21的第一固定部211的顶面2111与球顶22的顶面221齐平。振膜21的振动部212的截面形状呈弧形或近似弧形,振动部212的延伸轨迹呈圆角矩形。振膜21的振动部212下凹设置,也即振动部212向远离振膜21的第一固定部211的顶面2111和第二固定部213的顶面2131的方向凹陷。振膜21的振动部212受外力时能够发生形变,使得第一固定部211与第二固定部213相对彼此移动、球顶22与第二固定部213相对彼此移动。
在本申请实施例中,由于振膜21的振动部212下凹设置,使得电声换能器10能够节约其上部空间,而且在振膜21受水压或气压影响发生变形后,容易恢复原状。
请一并参阅图15和图16,图15是图12的音膜2在另一实施例中的结构示意图,图16是图15所示音膜2沿E-E处剖开的结构示意图。
音膜2包括振膜21和球顶22。球顶22大致呈矩形板状。球顶22包括相背设置的顶面221和底面222,球顶22的底面222的周缘区域上凹形成限位槽223。振膜21大致呈矩形环状。振膜21包括依次连接的第一固定部211、振动部212及第二固定部213,第一固定部211位于振动部212的内侧,第二固定部213位于振动部212的外侧。振膜21的第一固定部211部分收容于球顶22的限位槽223,且与球顶22相固定。振膜21的第一固定部211的顶面2111接触球顶22的限位槽223的底壁2231。示例性的,振膜21的第一固定部211的底面2112与球顶22的底面222齐平。振膜21的振动部212的截面形状呈弧形或近似弧形,振动部212的延伸轨迹呈圆角矩形。振膜21的振动部212上凸设置,也即振动部212向远离振膜21的第一固定部211的底面2112和第二固定部213的底面2132的方向凸起。振膜21的振动部212受外力时能够发生形变,使得第一固定部211与第二固定部213相对彼此移动、球顶22与第二固定部213相对彼此移动。
在本申请实施例中,由于振膜21的振动部212上凸设置,释放了振膜21下方的空间,允许位于振膜21下方的磁路组件10c设置更大的高度尺寸,从而增加电声换能器10的磁感应强度,提高电声换能器10的灵敏度。
请一并参阅图12和图17,图17是图12所示连接框3沿F-F处剖开的结构示意图。
示例性的,连接框3的截面形状大致呈Z形,连接框3的延伸轨迹呈圆角矩形。连接框3包括本部31、外延部32及内延部33。外延部32连接于本部31的底面311,向本部31的外侧延伸。外延部32的底面321面积大于本部31的底面311面积,以增加连接框3与其他部件的连接面积。内延部33连接于本部31的顶面312,向本部31的内侧延伸。内延部33的顶面331面积大于本部31的顶面312面积,以增加连接框3与其他部件的连接面积。在本实施例中,连接框3的两端端面(也即外延部32的底面321和内延部33的顶面331)面积较大,使得连接框3与外部结构连接面积较大,连接关系更为稳固。其中,连接框3可以一体成型。
在其他一些实施例中,连接框3的截面形状也可以是竖直的“一”形、L形、倒L形、T形、倒T形、“匸”形等。本申请不对连接框3的截面形状作严格限定。
请再次参阅图12,两个柔性电路板5的结构相同。柔性电路板5包括本体51、第一枝节52及第二枝节53。本体51包括中部511及分别连接于中部511的两侧的两个端部512。第一枝节52包括首端521、末端522及连接于首端521与末端522之间的连接段523。第二枝节53包括首端531、末端532及连接于首端531与末端532之间的连接段533。
第一枝节52的首端521及第二枝节53的首端531均连接至本体51的中部511。示例性的,第一枝节52的首端521与第二枝节53的首端531相连接,两者拼接后连接至本体51的中部511。在其他一些实施例中,第一枝节52的首端521与第二枝节53的首端531分别连接至本体51的中部511的不同位置,两者之间形成间隙。
第一枝节52的末端522与第二枝节53的末端532彼此间隔设置,且与本体51间隔设置,第一枝节52的末端522及第二枝节53的末端532为活动端部,可以相对本体51活动。当第一枝节52的末端522受力相对本体51活动时,可以带动第一枝节52的连接段523相对本体51活动。当第二枝节53的末端532受力相对本体51活动时,可以带动第二枝节53的连接段533相对本体51活动。
如图12所示,四个辅助振膜6的结构相同。辅助振膜6大致呈扇形。辅助振膜6包括依次连接的第一固定部61、振动部62及第二固定部63,第一固定部61位于振动部62内侧,第二固定部63位于振动部62的外侧。辅助振膜6的振动部62的截面形状呈弧形或近似弧形,振动部212的延伸轨迹呈弧形。辅助振膜6的振动部62下凹设置,也即振动部62向远离第一固定部61的顶面611和第二固定部63的顶面631的方向凹陷。辅助振膜6的第一固定部61呈扇形。辅助振膜6的第二固定部63远离第一固定部61的一侧形成缺口632。辅助振膜6的振动部62受外力时能够发生形变,使得第一固定部61与第二固定部63相对彼此移动。
请一并参阅图18和图19,图18是图10所示振动组件10b沿G-G处剖开的结构示意图,图19是图10所示振动组件10b在另一角度的结构示意图。
音圈4的一端固接音膜2。示例性的,音圈4通过连接框3间接连接音膜2。例如,连接框3位于音圈4与音膜2之间,且连接框3的一端固接音圈4,连接框3的另一端固接音膜2。结合参阅图17和图18,连接框3的内延部33的顶面331接触音膜2的球顶22的底面222,两者之间可以通过粘接方式彼此固定。连接框3的外延部32的底面321接触音 圈4的顶面43,两者之间可以通过粘接方式彼此固定。其中,连接框3的外延部32的底面321面积可以小于音圈4的顶面43面积。
在本实施例中,连接框3将音圈4与音膜2隔离,使得音膜2远离音圈4,同时连接框3可以对音圈4起到散热作用,从而降低因音圈4过热而对音膜2造成损伤的风险。在其他一些实施例中,电声换能器10省去连接框3,音圈4直接连接音膜2,以简化电声换能器10的结构。
如图18和图19所示,两个柔性电路板5彼此间隔地对称排布。两个柔性电路板5可以相对第一基准面对称。两个柔性电路板5分别位于音圈4的两边的外侧。各柔性电路板5的两个枝节末端(522、532)分别固接音圈4的两个圆角42。在同一个柔性电路板5中,第一枝节52的末端522固接音圈4的一个圆角42,第二枝节53的末端532固接音圈4的另一个圆角42。
示例性的,音圈4包括排布于电声换能器10的长度方向X的左边和右边,以及连接左边两端的两个左边圆角,以及连接右边两端的两个右边圆角。两个柔性电路板5包括第一柔性电路板和第二柔性电路板,第一柔性电路板位于音圈4的左边的外侧,第二柔性电路板位于音圈4的右边的外侧。第一柔性电路板的第一枝节的末端和第二枝节的末端分别连接音圈4的两个左边圆角,第二柔性电路板的第一枝节的末端和第二枝节的末端分别连接音圈4的两个右边圆角。
其中,柔性电路板5的枝节末端(522、532)固定于音圈4的底面44。柔性电路板5的枝节末端(522、532)与音圈4的圆角42之间可以通过粘接方式彼此固定。示例性的,音圈4包括两个子音圈,两个子音圈在电声换能器10的厚度方向Z上堆叠设置,其中一个子音圈的引线两端分别电连接两个柔性电路板5的一个枝节末端,另一个子音圈的引线两端分别电连接两个柔性电路板5的另一个枝节末端。
例如,两个子音圈包括第一子音圈和第二子音圈,第一柔性电路板的第一枝节的末端连接第一子音圈的引线的一端,第二柔性电路板的第一枝节的末端连接第一子音圈的引线的另一端,第二柔性电路板的第二枝节的末端连接第二子音圈的引线的一端,第一柔性电路板的第二枝节的末端连接第二子音圈的引线的另一端。电流可以沿“第一柔性电路板的第一枝节的末端——第一子音圈的引线的一端——第一子音圈的引线的另一端——第二柔性电路板的第一枝节的末端——第二柔性电路板的第二枝节的末端——第二子音圈的引线的一端——第二子音圈的引线的另一端——第一柔性电路板的第二枝节的末端”的轨迹流动。
在其他一些实施例中,两个柔性电路板5的两个枝节末端(522、532)与两个子音圈的连接关系也可以与前述实施例不同,本申请实施例对此不作严格限定。在其他一些实施例中,音圈4也可以包括更多个子音圈。音圈4还可以包括音圈载体,多个子音圈缠绕地固定于音圈载体,音圈载体的一端固接音膜,另一端部分插入磁路组件中。
如图18和图19所示,四个辅助振膜6分别位于音圈4的四个圆角42的外侧。四个辅助振膜6彼此间隔排布于两个柔性电路板5远离音圈4的一侧。四个辅助振膜6的一端(即第一固定部61)分别固接两个柔性电路板5的第一枝节52的末端522及第二枝节53的末端532,各辅助振膜6的另一端(即第二固定部63)固接至相邻的柔性电路板5的本体51 的端部512,各辅助振膜6的两端能够相对彼此移动。
示例性的,四个辅助振膜6包括位于音圈4的左边圆角外侧的第一辅助振膜和第二辅助振膜,还包括位于音圈4的右边圆角外侧的第三辅助振膜和第四辅助振膜。第一辅助振膜的第一固定部和第二辅助振膜的第一固定部分别固接第一柔性电路板的第一枝节的末端及第二枝节的末端,第一辅助振膜的第二固定部和第二辅助振膜的第二固定部分别固接第一柔性电路板的本体的两个端部。第三辅助振膜的第一固定部和第四辅助振膜的第一固定部分别固接第二柔性电路板的第一枝节的末端及第二枝节的末端,第三辅助振膜的第二固定部和第四辅助振膜的第二固定部分别固接第二柔性电路板的本体的两个端部。
其中,辅助振膜6固定于柔性电路板5的一端露出部分柔性电路板5。换言之,柔性电路板5的本体51的端部512可以经辅助振膜6的第二固定部63的缺口632露出。柔性电路板5的本体51的端部512相对辅助振膜6外露的区域可以用于连接电声换能器10的其他部件。例如,如图8所示,柔性电路板5的本体51的两个端部512的外露区域可以用于固定(例如焊接)电路板40的两个分支末端,以实现电声换能器10与外部器件的电连接。
请参阅图20,图20是图10所示振动组件10b的柔性电路板5与音圈4的组装结构示意图。
示例性的,柔性电路板5的第一枝节52及第二枝节53对称设置。第一枝节52及第二枝节53可以相对第二基准面对称。第一枝节52的连接段523包括弯折段5231及直线段5232,弯折段5231的一端连接第一枝节52的末端522,弯折段5231的另一端连接直线段5232的一端,直线段5232的另一端连接第一枝节52的首端521。弯折段5231包括一节或多节弧线段5233,各弧线段5233与连接第一枝节52的音圈4的圆角42同轴设置。本申请实施例中,两个结构同轴设置,是指这两个结构的圆心线(或称为中心线)重合,允许由于制作公差、组装公差等产生的稍许偏差。
在本实施例中,由于弯折段5231的弧线段5233与音圈4的圆角42同轴设置,当音圈4带动柔性电路板5振动时,柔性电路板5的形状能够更好地适应变形和位移需求,使得柔性电路板5的可靠性更佳、使用寿命更长。此外,通过使弧线段5233与音圈4的圆角42同轴设置,也使得弯折段5231能够充分利用音圈4的圆角42的外侧空间,从而排布更长尺寸的走线,使得柔性电路板5在随音圈4大幅度振动时,应力较小,柔性电路板5的可靠性更高。
此外,在弯折部的长度满足需求,且占用空间较小时,靠近弯折部排布的本体51的端部512可以具有较大的面积,本体51的端部512既具有足够的面积与辅助振膜6相互固定,也具有足够的面积与电声换能器10的外部结构相互固定。
其中,第一枝节52的直线段5232的延伸方向可以大致平行于电声换能器10的宽度方向Y。此时,直线段5232的长度较大,使得柔性电路板5的长度较长,更易实现大振幅。并且,直线段5232对电声换能器10的长度方向X占用的空间较小,有利于抑制柔性电路板5对磁路组件10c的空间挤压,使得磁路组件10c具有更大的排布空间,以确保电声换能器10的磁感应强度及敏感度。
其中,第一枝节52的弯折段5231还包括多节过渡段5234,过渡段5234可以排布于 相邻的弧线段5233之间,也可以排布于弧线段5233与直线段5232之间,也可以排布于弧线段5233与第一枝节52的末端522之间。
请参阅图21,图21是图10所示振动组件10b的辅助振膜6、柔性电路板5及音圈4的组装结构示意图。
示例性的,辅助振膜6的振动部62的延伸轨迹与连接辅助振膜6的音圈4的圆角42同轴设置。在本实施例中,当辅助振膜6的第一固定部61随音圈4振动时,辅助振膜6的振动部62的形状能够更好地适应变形和位移需求,使得辅助振膜6的可靠性更佳、使用寿命更长。此外,由于柔性电路板5的枝节的弯折段5231的弧线段5233也与音圈4的圆角42同轴设置(参阅图20),因此柔性电路板5的枝节的弯折段5231及辅助振膜6的振动部62,在随音圈4振动的过程中,形变趋势相似,能够降低两者之间发生碰撞的风险,使得电声换能器10的可靠性更高。
请一并参阅图22和图23,图22是图10所示磁路组件10c的分解示意图,图23是图10所示磁路组件10c的部分结构示意图。
电声换能器10的磁路组件10c包括中心极片71、边极片72、中心磁铁81、两个第一边磁铁82、两个第二边磁铁83、两个第三边磁铁84以及下极片9。中心极片71、边极片72及下极片9为导磁件。中心磁铁81、两个第一边磁铁82、两个第二边磁铁83以及两个第三边磁铁84为永磁铁,共同形成磁铁组。
示例性的,下极片9大致呈倒角矩形。下极片9包括相背设置的顶面91和底面92、以及连接在顶面91与底面92之间的周侧面93。周侧面93包括四个侧边面931和四个倒角面932,相邻两个侧边面931之间连接有一个倒角面932。其中两个相背设置的侧边面931的两端凹陷形成卡位空间9311,下极片9形成两两对称设置的四个卡位空间9311。四个卡位空间9311可以相对第一基准面对称,还可以相对第二基准面对称。下极片9的顶面91设有中心凹槽911和四个角落凹槽912,四个角落凹槽912围绕中心凹槽911设置,且与中心凹槽911彼此间隔。四个角落凹槽912分别位于顶面303的四个角落,且各角落凹槽912均延伸至各自对应的倒角面932及侧边面931。
中心磁铁81、两个第一边磁铁82、两个第二边磁铁83及两个第三边磁铁84均固定于下极片9的顶面91。例如,各磁铁可通过粘接方式与下极片9的顶面91相互固定。下极片9垂直于电声换能器10的厚度方向Z。中心磁铁81的厚度方向平行于电声换能器10的厚度方向Z。
中心磁铁81大致呈圆角矩形或矩形。中心磁铁81覆盖下极片9的中心凹槽911,中心凹槽911的设置不仅可以减轻下极片9的重量,还可以减少中心磁铁81的下表面与下极片9的顶面91的连接面积,使得面与面的连接更易实现、连接质量更高。在其他一些实施例中,下极片9也可以省去中心凹槽911。
两个第一边磁铁82对称地排布于中心磁铁81的两侧,第一边磁铁82与中心磁铁81之间形成第一间隙85。两个第一边磁铁82可以相对第一基准面对称。两个第二边磁铁83对称地排布于中心磁铁81的两侧,第二边磁铁83位于第一边磁铁82远离中心磁铁81的一侧。两个第二边磁铁83可以相对第一基准面对称。第二边磁铁83、第一边磁铁82及中心磁铁81排布于第一方向(也即电声换能器10的长度方向X)。示例性的,位于中心磁铁 81同一侧的第二边磁铁83与第一边磁铁82彼此固定,例如第二边磁铁83和第一边磁铁82面向彼此的两个侧面相互粘接,以保证磁路组件10c的可靠性。
两个第三边磁铁84对称地排布于中心磁铁81的另外两侧,第三边磁铁84与中心磁铁81之间形成第三间隙86。两个第三边磁铁84可以相对第二基准面对称。第三边磁铁84及中心磁铁81排布于第二方向(也即电声换能器10的宽度方向Y)。在本实施例中,中心磁铁81的四角外侧分别形成四个连通空间87,各连通空间87连通相邻的第一间隙85和第三间隙86,还连通至磁路组件10c的外部。其中,下极片9的四个角落凹槽912一一对应地连通四个连通空间87,以拼接成一容积更大的空间。
如图22所示,示例性的,边极片72包括连接框部721及位于连接框部721内侧的两个第一极片部722和两个第二极片部723,两个第一极片部722对称地连接于连接框部721的两个直边,两个第二极片部723对称地连接于连接框部721的另外两个直边。两个第一极片部722可以相对第一基准面对称,两个第二极片部723可以相对第二基准面对称。
第一极片部722大致呈T形,第一极片部722包括第一部分7221和第二部分7222,第二部分7222连接第一部分7221与连接框部721。第一极片部722的第二部分7222的两侧形成避让间隙7223,避让间隙7223位于第一极片部722的第一部分7221与连接框部721之间。
连接框部721内侧空间的四角形成角落间隙724,各角落间隙724位于相邻的第一极片部722与第二极片部723之间,各角落间隙724连通相邻的避让间隙7223。连接框部721的其中两个直边的外侧形成至少一个限位孔725。示例性的,设有限位孔725的直边与连接第二极片部723的直边相同。
请一并参阅图10和图24,图24是图10所示磁路组件10c沿H-H处剖开的结构示意图。
中心极片71固定于中心磁铁81远离下极片9的一侧,中心极片71可以通过粘接方式与中心磁铁81相互固定。边极片72位于第一边磁铁82、第二边磁铁83及第三边磁铁84远离下极片9的一侧。边极片72围绕中心极片71设置。边极片72的角落间隙724与中心磁铁81四角外侧的连通空间87相互连通。
边极片72的第一极片部722正对第一边磁铁82及第二边磁铁83设置。例如,第一极片部722的第一部分7221正对第一边磁铁82设置,第一极片部722的第二部分7222正对第二边磁铁83设置,边极片72的连接框部721连接第一极片部722的第二部分7222的直边部分正对第二边磁铁83设置。第一极片部722的第一部分7221与第一边磁铁82之间可以通过粘接实现固定。第一极片部722的第二部分7222及连接框部721与第二边磁铁83之间形成间隙。第一极片部722与中心极片71之间形成第二间隙88,第二间隙88连通第一间隙85。第二间隙88还连通边极片72的角落间隙724。
请一并参阅图10和图25,图25是图10所示磁路组件10c沿I-I处剖开的结构示意图。
边极片72的第二极片部723正对第三边磁铁84设置。第二极片部723与中心极片71之间形成第四间隙89,第四间隙89连通第三间隙86。第四间隙89还连通边极片72的角落间隙724。边极片72的连接框部721连接第二极片部723的直边部分正对第三边磁铁84 设置。此时,第三边磁铁84充分利用边极片72与下极片9之间的空间,以在电声换能器10的宽度方向Y上具有更大的尺寸,使得磁路组件10c的磁感应强度更高。
以下说明电声换能器10的振动组件10b和磁路组件10c的各部件与盆架1的具体位置关系及连接关系。可以理解的是,电声换能器10的各部件在符合相对位置关系要求、以满足电声换能器10的性能要求的情况下,彼此可以尽量紧凑地排布,以利于实现电声换能器10的小型化、微型化及便携性。
请一并参阅图26和图27,图26是图9所示电声换能器10沿J-J处剖开的结构示意图,图27是图9所示电声换能器10沿K-K处剖开的结构示意图。
音膜2的周缘固定于盆架1的框体11的第一面111。例如,音膜2的振膜21可以通过粘接方式与盆架1的框体11的第一面111相互固定。音膜2的振动方向平行于电声换能器10的厚度方向Z。框体11内侧空间形成下窄上宽的形状,使得振膜21的振动部212具有更大的振动空间,有利于音膜2实现大幅度振动。音圈4位于框体11内侧,且一端固接音膜2。示例性的,音圈4通过连接框3连接音膜2。连接框3固接音膜2的球顶22。当音膜2采用图15所示结构时,连接框3固接振膜21。
下极片9固接盆架1的多个支脚12且与框体11间隔设置。其中,盆架1的多个支脚12的末端可以收容于下极片9的卡位空间9311(如图22所示),且与下极片9的面向卡位空间9311的表面通过粘接方式彼此固定。下极片9的垂直方向平行于电声变换器的厚度方向。
中心磁铁81、两个第一边磁铁82、两个第二边磁铁83以及两个第三边磁铁84均固定于下极片9朝向框体11的一侧。两个第一边磁铁82位于中心磁铁81的两侧,两个第二边磁铁83位于中心磁铁81的两侧,第一边磁铁82位于第二边磁铁83与中心磁铁81之间。音圈4远离音膜2的一端部分位于第一边磁铁82与中心磁铁81之间的第一间隙85。两个第三边磁铁84位于中心磁铁81的另外两侧。音圈4远离音膜2的一端部分位于第三边磁铁84与中心磁铁81之间的第三间隙86。中心极片71固定于中心磁铁81朝向音膜2的一侧,中心极片71位于中心磁铁81与音膜2之间。
其中,电声换能器10通过多个支脚12支撑于框体11与下极片9之间,多个支脚12不仅能够起到支撑、连接作用,而且占用的框体11与下极片9之间的空间很小,使得框体11与下极片9之间形成较大的磁路排布空间,磁路组件10c可以充分利用该空间排布磁铁,以使电声换能器10的磁感应强度较高、灵敏度较佳。
请一并参阅图26至图28,图28是图9所示电声换能器10的边极片72与盆架1的组装结构示意图。
边极片72固定于框体11的内侧。例如,边极片72的连接框部721可以卡入框体11的固定槽115,连接框部721部分位于固定槽115内、部分位于固定槽115外,边极片72的第一极片部722及第二极片部723位于固定槽115外。如图27所示,盆架1的限位块13的限位条131抵持边极片72的连接框部721。如图28所示,限位块13的至少一个限位脚132一一对应地卡入连接框部721的至少一个限位孔725。
如图26所示,边极片72的两个第一极片部722分别位于中心极片71的两侧,第一极片部722与中心极片71之间形成第二间隙88,第二间隙88连通第一间隙85,音圈4部分 位于第二间隙88。如图27所示,边极片72的两个第二极片部723分别位于中心极片71的另外两侧,第二极片部723与中心极片71之间形成第四间隙89,第四间隙89连通第三间隙86,音圈4部分位于第四间隙89。
请一并参阅图29和图30,图29是图26所示磁路组件10c及音圈4的示意图,图30是图27所示磁路组件10c与音圈4的示意图。
示例性的,中心磁铁81靠近中心极片71的一端为N极,靠近下极片9的一端为S极。第一边磁铁82、第二边磁铁83及第三边磁铁84靠近边极片72的一端为S极,靠近下极片9的一端为N极。磁力线(如图29和图30中虚线所示)的路径为“中心磁铁81的N极——中心极片71——第二间隙88——边极片72——第一边磁铁82的S极——第一边磁铁82的N极——下极片9——中心磁铁81的S极”,和“中心磁铁81的N极——中心极片71——第二间隙88——边极片72——第二边磁铁83的S极——第二边磁铁83的N极——下极片9——中心磁铁81的S极”,和“中心磁铁81的N极——中心极片71——第四间隙89——边极片72——第三边磁铁84的S极——第三边磁铁84的N极——下极片9——中心磁铁81的S极”。由于音圈4部分位于第二间隙88和第四间隙89,磁力组件于第二间隙88和第四间隙89形成磁场,故而,当音圈4通电时,产生安培力,带动音圈4及连接音圈4的音膜2振动。
在本实施例中,磁路组件10c通过七磁路结构设计,使得第二间隙88的磁感应强度很高,磁路组件10c具有足够高的磁感应强度,从而提高磁路驱动力,音圈4通电时受到的安培力更大,电声换能器10的灵敏度更高。
在其他一些实施例中,中心磁铁81靠近中心极片71的一端为S极,靠近下极片9的一端为N极。第一边磁铁82、第二边磁铁83及第三边磁铁84靠近边极片72的一端为N极,靠近下极片9的一端为S极。
请再次参阅图26和图27,音圈4通过连接框3连接音膜2,因此音圈4远离音膜2的端部与音膜2之间的间距较大,使得音圈4能够充分插入磁路组件10c,磁路组件10c产生的磁场有效地作用于音圈4,而且音膜2与磁路组件10c之间的间距较大,音膜2的振动空间较大,有助于音膜2实现大幅度振动。
请一并参阅图26和图31,图31是图9所示电声换能器10的部分结构示意图。图31中示意出柔性电路板5与盆架1及边极片72的位置关系。
两个柔性电路板5均部分固定于盆架1的框体11的第二面112,且彼此间隔地对称分布。柔性电路板5的两个枝节末端(522、532)分别固接音圈4的两个圆角42。例如,柔性电路板5的本体51固接框体11的第二面112,柔性电路板5的第一枝节52和第二枝节53相对框体11悬空设置,柔性电路板5的第一枝节52的末端522和第二枝节53的末端532分别固接音圈4的两个圆角42。
其中,柔性电路板5与边极片72彼此间隔设置。示例性的,柔性电路板5的本体51与边极片72可以在电声换能器10的厚度方向Z上彼此间隔地堆叠设置,固定于盆架1的柔性电路板5的本体51及边极片72由盆架1的部分结构隔开。
柔性电路板5的第一枝节52的首端521正对边极片72的第一极片部722的第二部分7222,第一枝节52的首端521与第一极片部722的第二部分7222在电声换能器10的厚度 方向Z上彼此间隔。第一枝节52的连接段523和末端522正对位于第一极片部722的第二部分7222一侧的避让间隙7223和角落间隙724。由于第一枝节52在音圈4的带动下振动时,第一枝节52的振幅由末端522向首端521逐渐减小,第一枝节52的首端521的振幅很小、或者不振动,因此第一枝节52能够充分利用边极片72的间隙进行振动,且振动时不会与边极片72发生擦碰,有利于提高电声换能器10的可靠性。
柔性电路板5的第二枝节53的首端531正对边极片72的第一极片部722的第二部分7222,第二枝节53的首端531与第一极片部722的第二部分7222在电声换能器10的厚度方向Z上彼此间隔。第二枝节53的连接段533和末端532正对位于第一极片部722的第二部分7222另一侧的避让间隙7223和角落间隙724。由于第二枝节53在音圈4的带动下振动时,第二枝节53的振幅由末端532向首端531逐渐减小,第二枝节53的首端531的振幅很小、或者不振动,因此第二枝节53能够充分利用边极片72的间隙进行振动,且振动时不会与边极片72发生擦碰,有利于提高电声换能器10的可靠性。
请一并参阅图26和图32,图32是图9所示电声换能器10的另一部分结构示意图。图32中示意出柔性电路板5与磁路组件10c的各磁铁的位置关系。
两个柔性电路板5对称地排布于中心磁铁81的两侧。柔性电路板5位于第一边磁铁82远离中心磁铁81的一侧。换言之,第一边磁铁82位于柔性电路板5与中心磁铁81之间。柔性电路板5位于第二边磁铁83与音膜2之间。换言之,第二边磁铁83位于柔性电路板5与下极片9之间。
相较于传统的将柔性电路板排布于边磁铁与中心磁铁的电声换能器,本实施例的电声换能器10通过改变柔性电路板5与第一边磁铁82之间的相对位置关系,使得第一边磁铁82与中心磁铁81之间的间隙更窄,磁路组件10c的磁感应强度更高,有助于提高电声换能器10的灵敏度。同时,电声换能器10利用柔性电路板5与下极片9之间的空间增加设置一对第二边磁铁83,从而有效提高磁路组件10c的磁感应强度,显著提升磁路组件10c的驱动力,电声换能器10具有更佳的灵敏度。
经仿真,本申请实施例的电声换能器10将传统的5磁路(也即包括一个中心磁铁、四个边磁铁)的结构改进为7磁路(也即包括一个中心磁铁、六个边磁铁)的结构,能够使电声换能器10的灵敏度提升0.2dB至0.8dB。
一些实施例中,第一边磁铁82与柔性电路板5间隔设置。示例性的,在电声换能器10的XY平面(也即长度方向X和宽度方向Y所在平面)上,第一边磁铁82与柔性电路板5之间的间距在可以0.1毫米至0.5毫米的范围内。第二边磁铁83与柔性电路板5间隔设置。在电声换能器10的厚度方向Z上,柔性电路板5与第二边磁铁83之间的间距可以在0.1毫米至0.7毫米的范围内。可以理解的是,柔性电路板5与第一边磁铁82及第二边磁铁83之间的间距可以依据电声换能器10的具体需求进行设计,本申请实施例对此不作严格限定。
示例性的,在电声换能器10的厚度方向Z上,第一边磁铁82的高度大于第二边磁铁83的高度。在本实施例中,由于第一边磁铁82与柔性电路板5在电声换能器10的厚度方向Z上无堆叠关系,因此第一边磁铁82的高度可以大于第二边磁铁83的高度,以充分利用空间、提高磁路组件10c的磁感应强度,使得电声换能器10的灵敏度较佳。一些实施例 中,在电声换能器10的厚度方向Z上,第一边磁铁82的高度可以大于第二边磁铁83的高度、柔性电路板5的高度及第二边磁铁83与柔性电路板5的间距的和。
一些实施例中,如图32所示,第三边磁铁84与柔性电路板5间隔设置。示例性的,第三边磁铁84的两端靠近柔性电路板5的枝节末端(522、532),第三边磁铁84的两端端面841部分凹陷以形成避让区842,避让区842连通第三间隙86,柔性电路板5的枝节末端(522、532)部分位于避让区842,且与避让区842的壁面之间形成间隙。
请一并参阅图32和图33,图33是图9所示电声换能器10沿L-L处剖开的结构示意图。
示例性,柔性电路板5的本体51固定于盆架1,柔性电路板5的第一枝节52的末端522及第二枝节53的末端532分别固接音圈4的两个圆角42。音圈4振动时,第一枝节52的末端522和第二枝节53的末端532随音圈4振动,从第一枝节52的末端522、连接段523至首端521,振幅逐渐减小,从第二枝节53的末端532、连接段533至首端531,振幅逐渐减小,第一枝节52的首端521及第二枝节53的首端531的振幅很小。
柔性电路板5的本体51的两个端部512正对磁路组件10c的连通空间87设置,本体51的中部511正对第二边磁铁83设置。第一枝节52的首端521及第二枝节53的首端531正对第二边磁铁83设置,第一枝节52的连接段523靠近首端521的部分正对第二边磁铁83设置、远离首端521的部分正对连通空间87设置,第二枝节53的连接段533靠近首端531的部分正对第二边磁铁83设置、远离首端531的部分正对连通空间87设置,第一枝节52的末端522及第二枝节53的末端532正对连通空间87设置。柔性电路板5的第一枝节52及第二枝节53能够利用磁路组件10c的连通空间87进行振动。
在本实施例中,第二边磁铁83正对第一枝节52的首端521、第二枝节53的首端531及本体51的中部511设置,因此第二边磁铁83能够在电声换能器10的长度方向X上,充分利用柔性电路板5下方的空间,从而具有较大的尺寸,以有效提升磁路组件10c的磁感应强度。
第二边磁铁83正对振幅较小的第一枝节52的首端521及靠近首端521的部分连接段523、第二枝节53的首端531及靠近首端531的部分连接段533,因此第二边磁铁83能够在电声换能器10的宽度方向Y上,充分利用柔性电路板5下方的空间,从而具有较大的尺寸,以有效提升磁路组件10c的磁感应强度。
如图33所示,辅助振膜6的一端连接柔性电路板5的本体51的端部512,另一端连接柔性电路板5的枝节末端(522、532)。辅助振膜6位于磁路组件10c的连通空间87,在连通空间87中振动。
其中,电声换能器10包括两个顺性系统,音膜2为位于音圈4上部的第一顺性系统,柔性电路板5及辅助振膜6为位于音圈4下部的第二顺性系统,两个顺性系统随音圈4振动,能够抑制音圈4滚振,有助于确保电声换能器10的具有较佳音质。其中,顺性系统的顺性系数是弹性系数的倒数,顺性系数高的部件受力时更易发生变形。
示例性的,在两个顺性系统中,音膜2的硬度较大、顺性较小,以使音膜2能够顺利推动空气发出声音;柔性电路板5和辅助振膜6的硬度较小、顺性较大,以使两个顺性系统的总硬度适当,从而确保电声换能器10的音量较大。其中,辅助振膜6的硬度大于柔性 电路板5的硬度,以使第二顺性系统的硬度较大,稳定性较佳,以更好地抑制音圈4摇摆,使音圈4的滚动幅度更小。
请一并参阅图32和图34,图34是图32所示第一边磁铁82及第二边磁铁83的结构示意图。
本申请实施例中,电声换能器10依据柔性电路板5的第一枝节52和第二枝节53的振动幅度,对第二边磁铁83的形状进行设计。例如,第二边磁铁83包括相背设置的第一表面831和第二表面832。第一表面831朝向柔性电路板5。第二表面832固定于下极片9(如图23所示),第二表面832为平面。第一表面831包括第一平面8311、第一倾斜面8312及第二倾斜面8313。第一平面8311正对第一枝节52的首端521和第二枝节53的首端531,第一平面8311平行于第二表面832。第一倾斜面8312面向第一枝节52的连接段523,第一倾斜面8312的一端连接第一平面8311的一端,第一倾斜面8312的另一端向靠近第二表面832的方向延伸。第二倾斜面8313面向第一枝节52的连接段523,第二倾斜面8313的一端连接第一平面8311的另一端,第二倾斜面8313的另一端向靠近第二表面832的方向延伸。
换言之,第二边磁铁83为中间高、两边高度逐渐减小的结构,中间高的位置正对柔性电路板5振幅小的部分,两边高度逐渐减小的位置正对柔性电路板5振幅逐渐增大的部分,从而既能够充分预留柔性电路板5的振动空间,还能够充分利用不干涉高度、提高磁铁尺寸,以使电声换能器10的磁感应强度更高。示例性的,第二边磁铁83在电声换能器10的宽度方向Y上的尺寸可以在2毫米至10毫米范围内。
其中,第一平面8311还可以正对柔性电路板5的振幅较小的其他部分,例如第一枝节52的连接段523靠近首端521的部分和第二枝节53的连接段533靠近首端531的部分。此时,第二边磁铁83具有更大的体积,能够增加电声换能器10的磁感应强度。
示例性的,第二倾斜面8313与第一倾斜面8312可以对称设置,且对称平面垂直于第二表面832。第二倾斜面8313与第一倾斜面8312可以相对第二基准面对称。由于柔性电路板5的第一枝节52与第二枝节53是对称设置的,且两者的振动幅度是对称的,故而对称设置的第二倾斜面8313及第一倾斜面8312能够更好地与第一枝节52及第二枝节53的振动情况相匹配。
其中,第一边磁铁82呈长方体。第二边磁铁83还包括两个相背设置的侧表面(833、834),侧表面833连接第二表面832的一端与第一倾斜面8312远离第一平面8311的一端,侧表面834连接第二表面832的另一端与第二倾斜面8313远离第一平面8311的一端。
如图34所示,在一些实施例中,第一边磁铁82与第二边磁铁83为分体设计,两者可以通过粘接相邻面相互固定。由于第二边磁铁83与第一边磁铁82在YZ平面(也即电声换能器10的宽度方向Y和厚度方向Z所在平面)的形状不同,因此分别成型后再通过组装方式形成一体式结构,能够降低成本,使得电声换能器10的成本更低。
在其他一些实施例中,第一边磁铁82与第二边磁铁83也可以为一体成型的异形磁铁。
请一并参阅图35和图36,图35是图32的第一边磁铁82及第二边磁铁83在另一种实施例中的结构示意图,图36是图35所示第一边磁铁82和第二边磁铁83与柔性电路板5的位置关系示意图。以下主要说明本实施例与前述实施例的区别,两者相同的大部分内 容不再赘述。
第二边磁铁83在电声换能器10的宽度方向Y上的尺寸为第二宽度W2,第一边磁铁82在电声换能器10的宽度方向Y上的尺寸为第一宽度W1,第二宽度W2小于第一宽度W1。
在本实施例中,第二边磁铁83在电声换能器10的宽度方向Y上的宽度较小,第二边磁铁83正对柔性电路板5振幅小的部分,例如,第一枝节52的首端521和第二枝节53的首端531;第二边磁铁83在电声换能器10的宽度方向Y上的两侧空间可以作为柔性电路板5的振动空间,正对柔性电路板5振幅较大的部分,例如第一枝节52的连接段523和第二枝节53的连接段533。
其中,第二边磁铁83还可以正对柔性电路板5的振幅较小的其他部分,例如第一枝节52的连接段523靠近首端521的部分和第二枝节53的连接段533靠近首端531的部分,以具有更大的体积。
其中,第二边磁铁83的第一表面831平行于第二表面832,第二边磁铁83呈长方体。
在一些实施例中,可以在满足第一枝节52和第二枝节53的振动空间需求的情况下,适当增加第二边磁铁83的第二宽度W2,或者,降低第二边磁铁83的高度并较大幅度地增加第二边磁铁83的第二宽度W2(此时,第二宽度W2可以等于或大于第一边磁铁82的第一宽度W1),以使第二边磁铁83的体积更大。
请一并参阅图37和图38,图37是图32的第一边磁铁82及第二边磁铁83在再一种实施例中的结构示意图,图38是图37所示第一边磁铁82和第二边磁铁83与柔性电路板5的位置关系示意图。以下主要说明本实施例与前述实施例的区别,两者相同的大部分内容不再赘述。
第二边磁铁83平行于YZ平面的截面形状呈梯形。具体的,第二边磁铁83的第一表面831平行于第二表面832。第一表面831正对柔性电路板5的第一枝节52的首端521和第二枝节53的首端531。第二边磁铁83还包括第一侧面835和第二侧面836,第一侧面835连接第一表面831的一端与第二表面832的一端,第二侧面836连接第一表面831的另一端与第二表面832的另一端。第一侧面835正对第一枝节52的连接段523,第二侧面836正对第二枝节53的连接段533。
请一并参阅图39和图40,图39是图32的第一边磁铁82及第二边磁铁83在再一种实施例中的结构示意图,图40是图39所示第一边磁铁82和第二边磁铁83与柔性电路板5的位置关系示意图。以下主要说明本实施例与前述实施例的区别,两者相同的大部分内容不再赘述。
第一边磁铁82与第二边磁铁83一体成型。第一边磁铁82的横截面形状与第二边磁铁83的横截面形状相同,第一边磁铁82的横截面及第二边磁铁83的横截面均垂直于电声换能器10的长度方向X。
在本实施例中,第一边磁铁82的高度相较于前述实施例降低,且其平行于电声换能器10的长度方向X的多个外表面与第二边磁铁83共面,使得第一边磁铁82与第二边磁铁83能够一体成型,以简化组装工序,提高组装精度。
其中,第二边磁铁83的第一表面831的各个面与柔性电路板5的位置关系可以与前述实施例相同,第一边磁铁82随第二边磁铁83的位置排布。
请参阅图41,图41是图32的第一边磁铁82及第二边磁铁83在再一种实施例中的结构示意图。以下主要说明本实施例与前述实施例的区别,两者相同的大部分内容不再赘述。
第一边磁铁82与第二边磁铁83一体成型。在电声换能器10的厚度方向Z上,第一边磁铁82的高度H1与第二边磁铁83的高度H2相同。第二边磁铁83在电声换能器10的宽度方向Y上的尺寸为第二宽度W2,第一边磁铁82在电声换能器10的宽度方向Y上的尺寸为第一宽度W1,第二宽度W2小于第一宽度W1。
相较于图35所示实施例的第一边磁铁82,本实施例的第一边磁铁82的高度H1降低,第一边磁铁82和第二边磁铁83在平行于XY平面方向上的两个表面均共面设置,使得第一边磁铁82与第二边磁铁83能够一体成型,以简化组装工序,提高组装精度。
请一并参阅图42和图43,图42是图32的第一边磁铁82及第二边磁铁83在再一种实施例中的结构示意图,图43是图42所示第一边磁铁82和第二边磁铁83与柔性电路板5的位置关系示意图。以下主要说明本实施例与前述实施例的区别,两者相同的大部分内容不再赘述。
第二边磁铁83包括第一磁部83a和第二磁部83b,第一磁部83a位于第二磁部83b与第一边磁铁82之间。第二磁部83b正对柔性电路板5的本体51设置,第一磁部83a正对柔性电路板5的第一枝节52的首端521及第二枝节53的首端531设置,第一磁部83a还可以正对第一枝节52的连接段523靠近首端521的部分及第二枝节53的连接段533靠近首端531的部分设置。
其中,第一磁部83a在电声换能器10的长度方向X上的长度相较于前述实施例的第二边磁铁83较短,第一磁部83a的其他结构及参数设计可参阅前述实施例的第二边磁铁83。
其中,在电声换能器10的厚度方向Z上,第二磁部83b的高度H4大于第一磁部83a的高度H3,第二磁部83b的高度H4小于第一边磁铁82的高度H1。示例性的,在电声换能器10中,第二磁部83b的顶面可以与柔性电路板5的本体51相接触,以充分利用柔性电路板5下方的空间。
其中,第一磁部83a与第二磁部83b可以一体成型,也可以通过组装(例如粘接)形成一体化结构。
可以理解的是,在不冲突的情况下,前述各实施例所描述第一边磁铁82及第二边磁铁83的特征可以相互组合,以形成新的实施例。
请一并参阅图44和图45,图44是图32的柔性电路板5、第一边磁铁82及第二边磁铁83在再一种实施例中的结构示意图,图45是图44所示第一边磁铁82和第二边磁铁83的结构示意图。以下主要说明本实施例与前述实施例的区别,两者相同的大部分内容不再赘述。
柔性电路板5包括本体51、第一枝节52及第二枝节53。本体51包括中部511及分别连接于中部511的两侧的两个端部512。第一枝节52的首端521及第二枝节53的首端531分别连接本体51的两个端部512。第二边磁铁83正对柔性电路板5的本体51的中部511。两个第一边磁铁82位于两个第二边磁铁83之间。
在本实施例中,由于柔性电路板5的第一枝节52与第二枝节53连接于本体51的两个端部512,因此本体51的中部511的内侧空间得以释放,相较于前述实施例,本实施例电 声换能器10能够在其长度方向X上,压缩第二边磁铁83的长度、增加第一边磁铁82的长度,使得磁路组件10c的磁感应强度更大。示例性的,在电声换能器10的长度方向X上,第一边磁铁82的长度L1可以大于第二边磁铁83的长度L2。
如图45所示,示例性的,第一边磁铁82呈长方体,第二边磁铁83呈长方体。在电声换能器10的厚度方向Z上,第一边磁铁82的高度H1可以大于第二边磁铁83的高度H2。在电声换能器10的宽度方向Y上,第二边磁铁83的宽度W2可以大于第一边磁铁82的宽度W1。
以上,仅为本申请的具体实施例,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内;在不冲突的情况下,本申请的实施例及实施例中的特征可以相互组合。因此,本申请的保护范围应以权利要求的保护范围为准。

Claims (20)

  1. 一种电声换能器,其特征在于,包括中心磁铁、两个第一边磁铁、两个第二边磁铁、音圈、音膜以及两个柔性电路板;
    两个所述第一边磁铁对称地排布于所述中心磁铁的两侧,所述第一边磁铁与所述中心磁铁之间形成第一间隙,两个所述第二边磁铁对称地排布于所述中心磁铁的两侧,所述第二边磁铁位于所述第一边磁铁远离所述中心磁铁的一侧;
    所述音圈的一端部分位于所述第一间隙,所述音膜固接所述音圈的另一端;
    两个所述柔性电路板对称地排布于所述中心磁铁的两侧,所述柔性电路板位于所述第一边磁铁远离所述中心磁铁的一侧,且位于所述第二边磁铁与所述音膜之间,所述柔性电路板的两个枝节末端分别固接所述音圈的两个角。
  2. 根据权利要求1所述的电声换能器,其特征在于,所述电声换能器还包括盆架,所述盆架的框体包括相背的第一面和第二面,所述音膜的周缘固定于所述框体的第一面,所述音圈位于所述框体内侧,两个所述柔性电路板均部分固定于所述框体的第二面。
  3. 根据权利要求2所述的电声换能器,其特征在于,所述柔性电路板包括本体、第一枝节及第二枝节,所述本体固接所述框体的第二面,所述第一枝节的首端及所述第二枝节的首端均连接至所述本体的中部,所述第一枝节的末端固接所述音圈的一个角,所述第二枝节的末端固接所述音圈的另一个角,所述第一枝节的首端及所述第二枝节的首端正对所述第二边磁铁设置,所述第一枝节及所述第二枝节与所述第二边磁铁及所述第一边磁铁间隔设置。
  4. 根据权利要求3所述的电声换能器,其特征在于,所述第一枝节包括弯折段及直线段,所述弯折段的一端连接所述第一枝节的末端,所述弯折段的另一端连接所述直线段的一端,所述直线段的另一端连接所述第一枝节的首端,所述弯折段包括一节或多节弧线段,各所述弧线段朝远离所述中心磁铁方向凸起。
  5. 根据权利要求4所述的电声换能器,其特征在于,所述音圈呈圆角矩形,所述第一枝节的末端固接所述音圈的一个圆角,各所述弧线段与连接所述第一枝节的所述音圈的圆角同轴设置。
  6. 根据权利要求3至5中任一项所述的电声换能器,其特征在于,所述电声换能器还包括四个辅助振膜,四个所述辅助振膜彼此间隔地排布于两个所述柔性电路板远离所述音圈的一侧,四个所述辅助振膜的一端分别固接两个所述柔性电路板的所述第一枝节的末端及所述第二枝节的末端,各所述辅助振膜的另一端固接至相邻的所述柔性电路板的所述本体的一端,各所述辅助振膜的两端能够相对彼此移动。
  7. 根据权利要求1至6中任一项所述的电声换能器,其特征在于,在所述中心磁铁的厚度方向上,所述第一边磁铁的高度大于所述第二边磁铁的高度。
  8. 根据权利要求7所述的电声换能器,其特征在于,所述第二边磁铁包括相背设置的第一表面和第二表面,第一表面朝向所述柔性电路板,所述第一表面包括第一平面、第一倾斜面及第二倾斜面,所述第一平面与所述第二表面平行,所述第一倾斜面的一端连接所述第一平面的一端,所述第一倾斜面的另一端向靠近所述第二表面的方向延 伸,所述第二倾斜面的一端连接所述第一平面的另一端,所述第二倾斜面的另一端向靠近所述第二表面的方向延伸。
  9. 根据权利要求7所述的电声换能器,其特征在于,所述第二边磁铁、所述第一边磁铁及所述中心磁铁排布于第一方向,所述第一边磁铁在第二方向上的尺寸为第一宽度,所述第二方向垂直于所述第一方向及所述中心磁铁的厚度方向,所述第二边磁铁在所述第二方向上的尺寸为第二宽度,所述第二宽度小于所述第一宽度。
  10. 根据权利要求1至6中任一项所述的电声换能器,其特征在于,所述第一边磁铁与所述第二边磁铁一体成型,所述第二边磁铁、所述第一边磁铁及所述中心磁铁排布于第一方向;
    所述第一边磁铁的横截面形状与所述第二边磁铁的横截面形状相同,所述第一边磁铁的横截面及所述第二边磁铁的横截面均垂直于所述第一方向;或者,
    在所述中心磁铁的厚度方向上,所述第一边磁铁的高度与所述第二边磁铁的高度相同,所述第一边磁铁在第二方向上的尺寸为第一宽度,所述第二方向垂直于所述第一方向及所述中心磁铁的厚度方向,所述第二边磁铁在所述第二方向上的尺寸为第二宽度,所述第二宽度小于所述第一宽度。
  11. 根据权利要求2所述的电声换能器,其特征在于,所述柔性电路板包括本体、第一枝节及第二枝节,所述本体固接所述框体的第二面,所述第一枝节的首端及所述第二枝节的首端分别连接所述本体的两个端部,所述第一枝节的末端固接所述音圈的一个角,所述第二枝节的末端固接所述音圈的另一个角。
  12. 根据权利要求11所述的电声换能器,其特征在于,在所述中心磁铁的厚度方向上,所述第一边磁铁的高度大于所述第二边磁铁的高度。
  13. 根据权利要求2至12中任一项所述的电声换能器,其特征在于,所述盆架还包括多个支脚,所述多个支脚彼此间隔地固定于所述框体的第二面;
    所述电声换能器还包括下极片,所述下极片固接所述多个支脚且与所述框体间隔设置,所述中心磁铁、两个所述第一边磁铁及两个所述第二边磁铁均固定于所述下极片朝向所述框体的一侧。
  14. 根据权利要求13所述的电声换能器,其特征在于,所述电声换能器还包括中心极片以及边极片,所述中心极片固定于所述中心磁铁远离所述下极片的一侧,所述边极片固定于所述框体的内侧,且与所述柔性电路板间隔设置,所述边极片包括第一极片部,所述第一极片部正对所述第一边磁铁及所述第二边磁铁设置,所述第一极片部与所述中心极片之间形成第二间隙,所述第二间隙连通所述第一间隙,所述音圈部分位于所述第二间隙。
  15. 根据权利要求14所述的电声换能器,其特征在于,所述电声换能器还包括两个第三边磁铁,两个所述第三边磁铁固定于所述下极片朝向所述框体的一侧,且对称地排布于所述中心磁铁的另外两侧,所述第三边磁铁与所述中心磁铁之间形成第三间隙;
    所述边极片还包括第二极片部,所述第二极片部正对所述第三边磁铁,所述第二极片部与所述中心极片之间形成第四间隙,所述第四间隙连通所述第三间隙,所述音圈部分位于所述第四间隙、部分位于所述第三间隙。
  16. 根据权利要求1至15中任一项所述的电声换能器,其特征在于,所述电声换能器还包括连接框,所述连接框位于所述音圈与所述音膜之间,且所述连接框的一端固接所述音圈,所述连接框的另一端固接所述音膜。
  17. 一种扬声器模组,其特征在于,包括模组上壳及权利要求1至16中任一项所述的电声换能器,所述电声换能器固接所述模组上壳,所述音膜与所述模组上壳之间形成前音腔,所述模组上壳设有出音孔,所述出音孔连通所述前音腔与所述扬声器模组的外部。
  18. 根据权利要求17所述的扬声器模组,其特征在于,所述扬声器模组还包括模组下壳,所述模组下壳与所述模组上壳相固定,所述电声换能器位于所述模组下壳与所述模组上壳内侧,所述音膜背离所述前音腔的一侧形成后音腔,所述模组下壳设有泄露孔,所述泄露孔连通所述后音腔与所述扬声器模组的外部。
  19. 一种电子设备,其特征在于,包括壳体及权利要求17或18所述的扬声器模组,所述扬声器模组收容于所述壳体的内部,所述壳体设有扬声孔,所述扬声孔连通所述出音孔与所述电子设备的外部。
  20. 一种电子设备,其特征在于,包括壳体、显示模组及受话器,所述显示模组包括盖板及显示面板,所述盖板固定于所述壳体,所述显示面板固定于所述盖板朝向所述壳体的内表面,所述受话器收容于所述壳体的内部,所述受话器为权利要求1至16中任一项所述的电声换能器;
    所述盖板设有受话孔,或者,所述盖板的边缘与所述壳体之间形成受话孔,或者,所述壳体设有受话孔;
    所述受话器发出的声音经所述受话孔传输至所述电子设备的外部。
PCT/CN2020/127758 2019-11-28 2020-11-10 电声换能器、扬声器模组及电子设备 WO2021104006A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20894300.1A EP4040802B1 (en) 2019-11-28 2020-11-10 Electroacoustic transducer, loudspeaker module and electronic device
US17/777,764 US11937062B2 (en) 2019-11-28 2020-11-10 Electroacoustic transducer, speaker module, and electronic device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911194492.1 2019-11-28
CN201911194492.1A CN112866880B (zh) 2019-11-28 2019-11-28 电声换能器、扬声器模组及电子设备

Publications (1)

Publication Number Publication Date
WO2021104006A1 true WO2021104006A1 (zh) 2021-06-03

Family

ID=75995829

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/127758 WO2021104006A1 (zh) 2019-11-28 2020-11-10 电声换能器、扬声器模组及电子设备

Country Status (4)

Country Link
US (1) US11937062B2 (zh)
EP (1) EP4040802B1 (zh)
CN (1) CN112866880B (zh)
WO (1) WO2021104006A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113365175A (zh) * 2021-06-26 2021-09-07 浙江欧赛电子有限公司 一种大功率超低音扬声器用盆架
CN114679674A (zh) * 2022-03-29 2022-06-28 维沃移动通信有限公司 扬声器及电子设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114501260B (zh) * 2021-07-23 2024-04-12 北京荣耀终端有限公司 一种内核、扬声器模组和电子设备
CN116055960B (zh) * 2022-06-27 2023-10-27 荣耀终端有限公司 扬声器模组的内核、扬声器模组和电子设备
CN117939366A (zh) * 2022-06-27 2024-04-26 荣耀终端有限公司 内核、扬声器模组及电子设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170265007A1 (en) * 2014-11-20 2017-09-14 Goertek, Inc. Speaker Structure
CN110418256A (zh) * 2018-04-27 2019-11-05 歌尔股份有限公司 发声装置单体、发声模组及电子终端
CN110418254A (zh) * 2018-04-27 2019-11-05 歌尔股份有限公司 发声装置单体、发声模组及电子终端
CN110418259A (zh) * 2018-04-27 2019-11-05 歌尔股份有限公司 发声装置单体、发声模组及电子终端
CN110418255A (zh) * 2018-04-27 2019-11-05 歌尔股份有限公司 发声单体、发声模组及电子终端
CN110418261A (zh) * 2018-04-27 2019-11-05 歌尔股份有限公司 发声单体、发声模组及电子终端

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090028877A (ko) * 2007-09-17 2009-03-20 김영안 전기역학적 전기음향 변환기
JP6270651B2 (ja) 2014-07-24 2018-01-31 アルパイン株式会社 スピーカ装置
CN105657614B (zh) * 2016-03-21 2019-06-07 歌尔股份有限公司 动圈式扬声器单体
CN206674192U (zh) 2017-04-13 2017-11-24 瑞声科技(新加坡)有限公司 微型扬声器
CN207968891U (zh) * 2018-01-27 2018-10-12 瑞声科技(新加坡)有限公司 发声器件
CN208158872U (zh) * 2018-05-02 2018-11-27 歌尔科技有限公司 扬声器单体
CN209517495U (zh) * 2018-12-03 2019-10-18 精拓丽音科技(北京)有限公司 一种电声转换装置
CN209526874U (zh) 2018-12-30 2019-10-22 瑞声科技(新加坡)有限公司 扬声器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170265007A1 (en) * 2014-11-20 2017-09-14 Goertek, Inc. Speaker Structure
CN110418256A (zh) * 2018-04-27 2019-11-05 歌尔股份有限公司 发声装置单体、发声模组及电子终端
CN110418254A (zh) * 2018-04-27 2019-11-05 歌尔股份有限公司 发声装置单体、发声模组及电子终端
CN110418259A (zh) * 2018-04-27 2019-11-05 歌尔股份有限公司 发声装置单体、发声模组及电子终端
CN110418255A (zh) * 2018-04-27 2019-11-05 歌尔股份有限公司 发声单体、发声模组及电子终端
CN110418261A (zh) * 2018-04-27 2019-11-05 歌尔股份有限公司 发声单体、发声模组及电子终端

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4040802A4

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113365175A (zh) * 2021-06-26 2021-09-07 浙江欧赛电子有限公司 一种大功率超低音扬声器用盆架
CN114679674A (zh) * 2022-03-29 2022-06-28 维沃移动通信有限公司 扬声器及电子设备

Also Published As

Publication number Publication date
CN112866880B (zh) 2022-06-10
EP4040802B1 (en) 2024-01-03
US11937062B2 (en) 2024-03-19
EP4040802A1 (en) 2022-08-10
CN112866880A (zh) 2021-05-28
US20220417666A1 (en) 2022-12-29
EP4040802A4 (en) 2022-11-30

Similar Documents

Publication Publication Date Title
WO2021104006A1 (zh) 电声换能器、扬声器模组及电子设备
US11592690B2 (en) Loudspeaker device
CN114554367B (zh) 发声装置和电子设备
US9344804B2 (en) Miniature moving-coil speaker
WO2021233204A1 (zh) 电声换能器、扬声器模组和电子设备
US11570534B2 (en) Speaker device
CN114401477B (zh) 扬声器模组和电子设备
WO2019000537A1 (zh) 一种扬声器单体
WO2022042317A1 (zh) 一种电声换能器、扬声器模组及电子设备
CN220292186U (zh) 发声装置和电子设备
CN220292185U (zh) 发声装置和电子设备
US10820115B2 (en) Speaker
WO2023071887A1 (zh) 扬声器及电子设备
US20230328450A1 (en) Speaker
CN114125663B (zh) 一种电声换能器、扬声器模组及电子设备
US11665479B2 (en) Sounding device
CN212936200U (zh) 发声装置和可穿戴设备
US10244326B2 (en) Miniature sounder
WO2019205658A1 (zh) 发声装置单体、发声模组及电子终端
CN117729488A (zh) 电子设备
CN117729486A (zh) 发声装置和电子设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20894300

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2020894300

Country of ref document: EP

Effective date: 20220504

NENP Non-entry into the national phase

Ref country code: DE