WO2023274148A1 - 压电扬声器以及电子设备 - Google Patents

压电扬声器以及电子设备 Download PDF

Info

Publication number
WO2023274148A1
WO2023274148A1 PCT/CN2022/101518 CN2022101518W WO2023274148A1 WO 2023274148 A1 WO2023274148 A1 WO 2023274148A1 CN 2022101518 W CN2022101518 W CN 2022101518W WO 2023274148 A1 WO2023274148 A1 WO 2023274148A1
Authority
WO
WIPO (PCT)
Prior art keywords
protrusion
vibrating membrane
piezoelectric speaker
speaker according
vibrating
Prior art date
Application number
PCT/CN2022/101518
Other languages
English (en)
French (fr)
Inventor
何琼
刘峥
秦仁轩
黎椿键
刘石磊
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
Publication of WO2023274148A1 publication Critical patent/WO2023274148A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery

Definitions

  • the present application relates to the technical field of loudspeakers, in particular to a piezoelectric loudspeaker and electronic equipment.
  • Piezoelectric speakers are widely used in consumer electronics. Piezoelectric speakers have slim structural features, and their application in ultra-thin end products has unique advantages and values.
  • a piezoelectric speaker usually consists of a housing, a diaphragm, and a vibration source. However, the boundary energy loss of the piezoelectric speaker is large and the sound quality is poor.
  • Embodiments of the present application provide a piezoelectric speaker and an electronic device including the piezoelectric speaker, aiming to obtain a piezoelectric speaker with low energy consumption and good sound quality.
  • a piezoelectric speaker in a first aspect, includes a first fixing part, a second fixing part, a vibrating membrane and a vibration source, the second fixing part is fixedly connected to the first fixing part, the first fixing part includes a first protrusion, and the second fixing part includes a second protrusion , the second protrusion is arranged opposite to the first protrusion, the vibrating membrane includes a middle part and an edge part, the middle part is located inside the edge part, the edge part includes a clamping part and a non-clamping part, and the clamping part is clamped on the first protrusion Between and the second protrusion, the non-clamping part is located on the side of the clamping part away from the middle, the first protrusion and the second protrusion jointly form a simple support structure to support the vibrating film, and the vibration source is fixed to the vibrating film .
  • the clamping part of the vibrating membrane in the present application is clamped between the first protrusion and the second protrusion, and the non-clamping part is located on the side of the clamping part away from the middle part, that is to say, the edge of the edge part is not covered by the second protrusion.
  • the first protrusion and the second protrusion are clamped.
  • the first protrusion and the second protrusion jointly form a simple support structure to support the diaphragm, the first protrusion and the second protrusion only constrain the displacement of the diaphragm in the vertical direction, and the edge of the diaphragm can have a vertical direction Rotation with a certain degree of freedom releases the degree of freedom at the edge of the vibrating membrane.
  • the more constraints on the degrees of freedom of the vibrating membrane the faster the energy consumption.
  • the degree of freedom of the boundary of the vibrating membrane of the present application is not completely constrained, thereby effectively reducing the vibration of the vibrating membrane during the vibration process.
  • the energy consumption of the piezoelectric speaker is improved, the vibration energy is increased, the frequency response sensitivity of the piezoelectric speaker is effectively improved, the low-frequency distortion effect of the piezoelectric speaker is weakened, the sound quality of the piezoelectric speaker is improved, and the user experience is improved.
  • the vibration assembly further includes an elastic connector, one end of which is connected to the first fixing member and the other end is connected to the vibrating membrane; or one end of the elastic connecting member is connected to the second fixing member and the other end is connected to the vibrating membrane.
  • the simply supported structure supports the diaphragm.
  • the simply supported structure does not fully restrict the degree of freedom of the diaphragm, the piezoelectric speaker will have poor pure tone. The problem is that you can hear the noise generated by the vibrating membrane beating the first and second protrusions.
  • the present application connects the vibrating membrane and the fixing piece (the first fixing piece and/or the second fixing piece) by setting an elastic connecting piece to connect the vibrating membrane and the fixing piece.
  • the elastic connector has a certain degree of elasticity, connecting the diaphragm and the fixing member can not only ensure that the degree of freedom of the diaphragm is not restricted by the elastic connector, nor change the frequency response curve of the piezoelectric speaker, but also prevent the diaphragm from beating the first convex
  • the first and second protrusions avoid the generation of noise, avoid the generation of noise, and play a role in improving the full-frequency pure tone.
  • one end of the elastic connecting member is connected to the first protrusion, and the other end is connected to the vibrating membrane.
  • the first protrusion and the vibrating membrane are bonded by the elastic connecting member, so that the vibrating membrane will not beat the first protrusion and the second protrusion, thereby avoiding the generation of noise.
  • the first protrusion includes a first side and a second side opposite to each other, the first side is close to the middle, the second side is away from the middle, one end of the elastic connector is connected to the first side, and the other end is connected to the a vibrating membrane; or, one end of the elastic connecting piece is connected to the second side, and the other end is connected to the vibrating membrane.
  • the first protrusion includes a first side and a second side opposite to each other, the first side is close to the middle, the second side is away from the middle, the first side forms a groove, and one end of the elastic connector is connected to the The other end is connected to the vibrating membrane on the groove wall of the groove. Since the groove is formed on the first side, the elastic connecting piece is partially accommodated in the groove, and the groove has a certain position-limiting effect on the elastic connecting piece, so that the elastic connecting piece is stably connected to the first side.
  • the elastic connecting member is damping glue. Since the damping glue has a certain elasticity, connecting the vibrating film and the first fixing part (or the second fixing part) can not only ensure that the degree of freedom of the vibrating film is not restricted by the damping glue, but also not change the frequency response curve of the piezoelectric speaker. It avoids the vibrating film from beating the first and second protrusions, avoids the generation of noises, avoids the generation of noises, and plays the role of improving the full-frequency pure tone.
  • the elastic connecting member is ring-shaped, that is to say, the periphery of the edge of the vibrating membrane is connected to the fixing member through damping glue, thereby effectively preventing the vibrating membrane from beating the first protrusion and the second protrusion. From the beginning, the generation of noise is avoided, and the generation of noise is avoided, which plays a role in improving the full-frequency pure tone.
  • the vibrating membrane may also be partially connected to the first fixing member (or the second fixing member) through damping glue.
  • the first protrusion and the second protrusion are made of elastic material, so that the first protrusion and the second protrusion will not affect the vibrating film due to the high hardness during the process of clamping the vibrating film. damage.
  • the line contact between the first protrusion and the vibrating membrane there is a line contact between the first protrusion and the vibrating membrane, and the line of contact between the first protrusion and the vibrating membrane extends along the periphery of the edge portion.
  • the part of the first protrusion in contact with the vibrating membrane forms a line, and the surface of the vibrating membrane in contact with the first protrusion is a plane, so as to realize the line contact between the first protrusion and the vibrating membrane.
  • the smaller the contact area of the first protrusion with the vibrating membrane the smaller the constraints on the degree of freedom of the boundary of the vibrating membrane, and the smaller the energy loss of the vibrating membrane during the vibration process.
  • the contact area between the first protrusion and the vibrating film is reduced, thereby reducing the degree of freedom constraint of the first protrusion on the boundary of the vibrating film, and the vibrating film is vibrating during the vibration process.
  • the energy consumption of the piezoelectric speaker is small, the frequency response sensitivity of the piezoelectric speaker is effectively improved, the low-frequency distortion effect of the piezoelectric speaker is weakened, the sound quality of the piezoelectric speaker is improved, and the user experience is improved.
  • the end of the first protrusion facing the vibrating membrane is pointed, or the end surface of the first protrusion facing the vibrating membrane is an arc surface.
  • the contact surface of the first protrusion and the vibrating membrane extends along the periphery of the edge portion.
  • the contact surface of the first protrusion and the edge portion of the vibrating membrane is a plane, and the surface of the vibrating membrane in contact with the first protrusion is a plane, so as to realize the surface contact between the first protrusion and the vibrating membrane.
  • the contact surface of the first protrusion for supporting the vibrating membrane and the vibrating membrane is ensured to be large enough to ensure that the first protrusion can stably support the vibrating membrane. It can be understood that the width of the end surface of the first protrusion in contact with the vibrating membrane is very narrow, which restricts the degree of freedom of the vibrating membrane to a certain extent, but does not restrict the degree of freedom of the boundary of the vibrating membrane too much.
  • the line contact between the second protrusion and the vibrating membrane there is a line contact between the second protrusion and the vibrating membrane, and the line of contact between the second protrusion and the vibrating membrane extends along the periphery of the edge portion.
  • the contact area between the second protrusion and the vibrating film is reduced, thereby reducing the degree of freedom constraints of the second protrusion on the boundary of the vibrating film, and the vibrating film is vibrating during the vibration process.
  • the energy consumption of the piezoelectric speaker is small, the frequency response sensitivity of the piezoelectric speaker is effectively improved, the low-frequency distortion effect of the piezoelectric speaker is weakened, the sound quality of the piezoelectric speaker is improved, and the user experience is improved.
  • the end of the second protrusion facing the vibrating membrane is pointed, or the end surface of the second protrusion facing the vibrating membrane is an arc surface.
  • the contact surface of the second protrusion and the vibrating membrane extends along the periphery of the edge portion.
  • the contact surface of the second protrusion for supporting the vibrating membrane and the vibrating membrane as a plane, the contact area between the second protrusion and the vibrating membrane is ensured to be large enough to ensure that the second protrusion can stably support the vibrating membrane.
  • the width of the end surface of the second protrusion in contact with the vibrating membrane is very narrow, which restricts the degree of freedom of the vibrating membrane to a certain extent, but does not restrict the degree of freedom of the boundary of the vibrating membrane too much.
  • the first fixing part includes a connected first clamping part and a first connecting part
  • the second fixing part includes a connected second clamping part and a second connecting part
  • the first protrusion is formed on The first clamping part
  • the second protrusion is formed on the second clamping part
  • the first connecting part and the second connecting part are fixed to clamp the vibrating membrane between the first protrusion and the second protrusion.
  • the number of the first protrusion is one, and the first protrusion is arranged on the first clamping part; or, the number of the first protrusion is multiple, and the plurality of first protrusions are arranged at intervals The first holding part. That is to say, not all parts of the clamping part of the vibrating film are clamped between the first protrusion and the second protrusion, but are only partially clamped between the first protrusion and the second protrusion.
  • the clamping part of the vibrating film shown is entirely clamped between the first protrusion and the second protrusion.
  • the degree of freedom of the vibrating film is less constrained, so that the vibrating film can be effectively reduced on the basis shown in the figure.
  • the energy consumption in the vibration process increases the vibration energy, effectively improves the frequency response sensitivity of the piezoelectric speaker, reduces the low-frequency distortion effect of the piezoelectric speaker, improves the sound quality of the piezoelectric speaker, and improves user experience.
  • the vibrating assembly further includes a first counterweight, and the first counterweight is fixed at the middle of the vibration source.
  • the first counterweight can reduce the bending vibration amplitude of the central area of the piezoelectric sheet through its own weight, so that the energy can be transmitted to the edge area of the piezoelectric sheet, and the overall vibration amplitude of the piezoelectric sheet can be increased.
  • the first counterweight can achieve the purpose of suppressing the unbalanced amplitude between the center area and the edge area of the piezoelectric sheet, and the situation that the vibration direction of the center area and the edge area are opposite to each other disappears accordingly, so that the piezoelectric sheet is more inclined to the piston vibration, Finally, the effect of improving the low-frequency sensitivity of the piezoelectric speaker is achieved.
  • the vibrating assembly further includes a second counterweight, and the second counterweight is fixed to the vibrating membrane.
  • the damping effect is added to the vibrating membrane, the vibration mode of the vibrating membrane is changed, and the resonance is improved, thereby reducing the mechanical quality factor value of the piezoelectric speaker.
  • the piezoelectric speaker significantly improves the problems of many peaks and valleys and large distortion in the frequency response curve of the piezoelectric speaker, and makes the frequency response curve flat.
  • the second counterweight is arranged close to the vibration source, so that the flatness of the frequency response curve of the piezoelectric speaker is better.
  • the vibrating membrane further includes a connecting part, the connecting part is connected between the middle part and the edge part; the vibration source is fixed to the middle part, the second counterweight is arranged on the connecting part, and is arranged close to the middle part, and the connecting part includes The first width and the second counterweight are located between 1/4 of the first width and 1/3 of the first width, so that the sound effect of the piezoelectric speaker is better.
  • the middle part of the vibrating membrane is hollowed out.
  • the bonding area between the vibrating film and the vibration source can be reduced, and the constraint of the bonding on the vibration of the vibration source can be reduced, thereby reducing the energy dissipation of the vibration source and achieving the purpose of improving sensitivity.
  • the piezoelectric speaker further includes a housing, and a side of the first fixing member away from the second fixing member is fixedly connected to the housing.
  • the first fixing member and the housing are integrally formed.
  • the first fixing part and the housing can be formed by insert molding and other processes. Due to the integral structure composed of the first fixing part and the casing, the steps of assembling the first fixing part to the casing are reduced, and the production efficiency of the product is improved.
  • an electronic device in a second aspect, includes a casing and the above-mentioned piezoelectric speaker, and the piezoelectric speaker is arranged inside the casing.
  • Electronic equipment having the piezoelectric speaker has good sound quality.
  • an electronic device in a third aspect, includes a casing and the above-mentioned piezoelectric speaker, the piezoelectric speaker is arranged inside the casing, and the piezoelectric speaker and the casing form a cavity. That is to say, the cavity is jointly formed by the partial structure of the electronic device and the piezoelectric speaker, which is beneficial to the thinning of the electronic device.
  • Electronic equipment having the piezoelectric speaker has good sound quality.
  • the casing includes a middle frame, and the middle frame and the piezoelectric speaker form a cavity. That is to say, the cavity is jointly formed by the partial structure of the electronic device and the piezoelectric speaker, which is beneficial to the thinning of the electronic device.
  • Electronic equipment having the piezoelectric speaker has good sound quality.
  • the first fixing part of the vibrating component is integrally formed with the housing, thereby reducing the steps of fixing the first fixing part to the housing and improving product production efficiency.
  • FIG. 1 is a schematic structural diagram of an electronic device provided by the present application in some embodiments.
  • Fig. 2 is a structural schematic diagram of a piezoelectric speaker provided by the present application in some embodiments
  • Fig. 3 is a schematic diagram of an exploded structure of the piezoelectric speaker shown in Fig. 2;
  • Fig. 4 is a structural schematic diagram of some embodiments of the piezoelectric speaker shown in Fig. 2 cut along A-A;
  • Fig. 5 is a schematic diagram of an exploded structure of the vibrating assembly in Fig. 3;
  • Fig. 6 is a structural schematic view of the second fixing member at another angle in the structure shown in Fig. 5;
  • Fig. 7 is a comparative schematic diagram of the frequency response curves of the piezoelectric speaker of the present application and the traditional piezoelectric speaker;
  • Fig. 8 is a partially enlarged schematic diagram of a part of the structure shown in Fig. 4;
  • Fig. 9 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7;
  • Fig. 10 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7;
  • Fig. 11 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7;
  • Fig. 12 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7;
  • Fig. 13 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7;
  • Fig. 14 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7;
  • Fig. 15 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7;
  • Fig. 16 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7;
  • Fig. 17 is a structural schematic diagram of another angle of the structure such as the vibrating membrane in the structure shown in Fig. 5;
  • Fig. 18 is a schematic diagram of the amplitude of the piezoelectric speaker without the first counterweight
  • Fig. 19 is a schematic diagram of the amplitude of the piezoelectric speaker when the first counterweight is set
  • Fig. 20 is a graph showing the influence of the second counterweight at different positions of the vibrating membrane on the resonance of the piezoelectric speaker
  • Fig. 21 is a schematic diagram of the comparison between the piezoelectric speaker in the present application and the traditional piezoelectric speaker;
  • Fig. 22 is a schematic structural view of another embodiment of the piezoelectric speaker shown in Fig. 2;
  • Fig. 23 is a schematic diagram of an exploded structure of the vibration assembly of the piezoelectric speaker shown in Fig. 22;
  • Fig. 24 is a schematic cross-sectional structure diagram of the structure shown in Fig. 22 in the B-B direction;
  • Fig. 25 is a schematic cross-sectional structure diagram of the structure shown in Fig. 22 in the C-C direction;
  • Fig. 26 is a structural schematic diagram of another embodiment of the piezoelectric speaker shown in Fig. 2;
  • FIG. 27A is a schematic cross-sectional structure diagram of the piezoelectric speaker shown in FIG. 26 in the D-D direction;
  • Fig. 27B is a partial structural schematic diagram of the structure shown in Fig. 27A;
  • Fig. 27C is a structural schematic diagram of another embodiment of the structure shown in Fig. 27B;
  • Figure 27D is a schematic structural view of another embodiment of the structure shown in Figure 27B;
  • Fig. 28 is a structural schematic diagram of another embodiment of the piezoelectric speaker shown in Fig. 2;
  • FIG. 29 is a schematic diagram of an exploded structure of the piezoelectric speaker shown in FIG. 28;
  • Fig. 30 is a structural schematic diagram of another embodiment of the piezoelectric speaker shown in Fig. 2;
  • Fig. 31 is a schematic cross-sectional structure diagram of another embodiment of the piezoelectric speaker shown in Fig. 30;
  • Fig. 32 is a schematic top view of a partial structure of the piezoelectric speaker shown in Fig. 31;
  • Fig. 33 is a comparison diagram between the piezoelectric speaker in the present application and the traditional piezoelectric speaker;
  • Fig. 34 is a schematic structural diagram of another embodiment of the electronic device shown in Fig. 1;
  • FIG. 35 is a schematic diagram of an exploded structure of a partial structure of the structure shown in FIG. 34 .
  • connection can be detachably connected, or It is a non-detachable connection; it can be directly connected or indirectly connected through an intermediary.
  • FIG. 1 is a schematic structural diagram of an electronic device 1000 provided in this application in some embodiments.
  • the electronic device 1000 may be a mobile phone, a tablet computer, a notebook computer, an earphone, an audio system, a vehicle-mounted device, a wearable device, a foldable terminal device, a TV, and other electronic devices with speakers.
  • the wearable device may be a smart bracelet, a smart watch, a smart head display, smart glasses, and the like.
  • the electronic device 1000 in the embodiment shown in FIG. 1 is described by taking a mobile phone as an example.
  • the electronic device 1000 may include a housing 100 , a display module 200 , an external speaker 300 (also called a speaker), a non-external speaker 400 (also called an earpiece), a motherboard 500 , a processor 600 , a memory 700 and a battery 800 .
  • the casing 100 includes a frame 1001 and a rear cover 1002 , and the frame 1001 is connected to an edge of the rear cover 1002 .
  • the frame 1001 and the rear cover 1002 may be integrally formed, or may be assembled to form an integral structure.
  • the shell 100 is provided with a sound hole.
  • the number of speaker holes can be one or more. Exemplarily, there are multiple speaker holes 1003 , and the plurality of speaker holes 1003 are disposed 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 plate and a display panel.
  • the cover plate is fixed on the housing 100 , for example, the cover plate is fixed on a side of the frame 1001 away from the rear cover 1002 .
  • the display panel is fixed on the inner surface of the cover plate facing the rear cover 1002 .
  • the cover is used to protect the display panel.
  • the cover plate is provided with a telephone hole.
  • the receiving hole 2001 is a through hole penetrating through the cover plate.
  • the projection of the display panel on the cover plate is staggered from the receiver hole 2001 .
  • the display panel is used to display images, videos, etc., and the display panel may also integrate a touch function.
  • the display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active matrix organic light emitting diode or an active matrix organic light emitting diode (active-matrix organic light emitting diode, AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light emitting diodes (quantum dot light emitting diodes, QLED), etc.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • AMOLED active matrix organic light emitting diode
  • FLED flexible light-emitting diode
  • Miniled MicroLed, Micro-oLed
  • quantum dot light emitting diodes quantum dot light emitting diodes (quantum dot light emitting diodes, QLED), etc.
  • Both the loudspeaker 300 and the loudspeaker 400 are located inside the frame 1001 and between the display module 200 and the back cover 1002 .
  • the sound emitted by the external speaker 300 can be transmitted to the outside of the electronic device 1000 through the sound hole 1003 to realize the sound playing function of the electronic device 1000 .
  • the sound emitted by the non-external loudspeaker 400 is transmitted to the outside of the electronic device 1000 through the phone hole 2001 , so as to realize the sound playing function of the electronic device 1000 .
  • the external loudspeaker 300 and/or the non-external loudspeaker 400 may adopt piezoelectric speakers described in subsequent embodiments.
  • "A and/or B" includes "A", "B” and "A and B".
  • the motherboard 500 is located inside the casing 100 , and the processor 600 , memory 700 and other various circuit devices are integrated on the motherboard 500 .
  • the display panel, the external loudspeaker 300 and the non-external loudspeaker 400 are coupled to the processor 600 .
  • the processor 600 may include one or more processing units, for example: the processor 600 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processor (neural-network processing unit, NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.
  • the processor 600 can generate an operation control signal according to the instruction operation code and the timing signal, and complete the control of fetching and executing the instruction.
  • An internal memory may also be provided in the processor 600 for storing instructions and data.
  • the memory in processor 600 may be a cache memory.
  • the memory may store instructions or data used by the processor 600 or frequently used. If the processor 600 needs to use the instruction or data, it can be called directly from the memory. Repeated access is avoided, and the waiting time of the processor 600 is reduced, thereby improving the efficiency of the system.
  • processor 600 may include one or more interfaces.
  • the interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous transmitter (universal asynchronous receiver/transmitter, UART) interface, mobile industry processor interface (mobile industry processor interface, MIPI), general-purpose input and output (general-purpose input/output, GPIO) interface, subscriber identity module (subscriber identity module, SIM) interface, and /or universal serial bus (universal serial bus, USB) interface, etc.
  • the processor 600 may be connected to modules such as a touch sensor, a wireless communication module, a display, and a camera through at least one of the above interfaces.
  • Memory 700 may be used to store computer-executable program code, including instructions.
  • the memory 700 may include an area for storing programs and an area for storing data.
  • the storage program area can store an operating system, at least one application program required by a function (such as a camera function, a video function, etc.) and the like.
  • the storage data area can store data created during the use of the electronic device 1000 (such as image data, video data, etc.) and the like.
  • the memory 700 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (universal flash storage, UFS) and the like.
  • the processor 600 executes various functions, methods or data processing of the electronic device 1000 by executing the instructions stored in the memory 700 and/or the instructions stored in the memory provided in the processor 600, for example, making the external loudspeaker 300 emit sound , so that the non-external loudspeaker 400 collects sound and the like.
  • the battery 800 is used for powering the electronic device 1000 .
  • An audio module 30 for processing audio signals may also be integrated on the motherboard 500 , and the audio module 30 may include an audio signal transmitting chip 31 and a power amplifier 32 .
  • the audio signal transmitting chip 31 is used for transmitting audio signals.
  • the audio signal transmitting chip 31 is an independent chip. It can be understood that, by setting an independent chip to independently operate the function of transmitting audio signals, the transmission efficiency of audio signals can be improved.
  • the function of transmitting audio signals may also be integrated on a central processing unit (central processing unit, CPU).
  • CPU central processing unit
  • the interior of the electronic device 1000 can save the occupied space of one chip, thereby improving the utilization rate of the internal space of the electronic device 1000 .
  • the function of transmitting audio signals can also be integrated on other chips, such as the battery management chip 800 .
  • one end of the power amplifier 32 is electrically connected to the audio signal transmitting chip 31 , and the other end is electrically connected to the external speaker 300 .
  • the audio signal transmitting chip 31 transmits an audio signal
  • the audio signal is transmitted to the power amplifier 32
  • the power amplifier 32 processes the audio signal and transmits the processed audio signal to the external speaker 300 .
  • the external speaker 300 emits sound to the outside of the electronic device 1000 according to the audio signal.
  • the electronic device 1000 may also include one or more functional modules such as an antenna module, a mobile communication module, a sensor module, a motor, and a camera module.
  • the functional modules are coupled with the processor 600 .
  • the antenna module is used to transmit and receive electromagnetic wave signals, and the antenna module may include multiple antennas, and each antenna may be used to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas.
  • the mobile communication module can provide wireless communication solutions including 2G/3G/4G/5G applied on the electronic device 1000 .
  • the sensor module may include one or more of a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor or an ambient light sensor.
  • the motor can generate a vibrating prompt.
  • the motor can be used for incoming call vibration prompts, and can also be used for touch vibration feedback.
  • the camera module is used to collect template images and the like.
  • FIG. 2 is a schematic structural diagram of the piezoelectric speaker 10 provided by the present application in some embodiments.
  • FIG. 3 is a schematic diagram of an exploded structure of the piezoelectric speaker 10 shown in FIG. 2 .
  • the piezoelectric speaker 10 includes a housing 11 and a vibrating assembly 12.
  • the vibrating assembly 12 is installed at the opening 110 of the housing 11 and forms a cavity together with the housing 11. That is to say, the vibrating assembly 12 seals the housing 11. Opening 110.
  • the vibration component 12 is electrically connected to the power amplifier 32 on the main board 500 , and the vibration component 12 vibrates according to the audio signal sent by the power amplifier 32 .
  • the casing 11 is roughly a square cylinder.
  • the housing 11 may include a top surface 111 and an opening 110 formed on the top surface 111.
  • the opening 110 communicates with the interior of the housing 11.
  • the vibration assembly 12 is connected to the top surface 111 of the housing 11 and covers the opening 110, that is, the housing 11 and
  • the vibrating components 12 jointly surround and form a cavity A ( FIG. 4 ).
  • cavity A is a sealed cavity.
  • the sounding direction of the piezoelectric speaker 10 is the direction in which the vibrating assembly 12 faces away from the housing 11. By sealing the cavity A facing away from the sounding direction, the sound emitted by the piezoelectric speaker 10 is prevented from entering the cavity A to cause loss and affect the pressure. The sound quality of the electric speaker 10.
  • the casing 11 may also be in the form of a cylinder, a rectangular cylinder or a special-shaped body.
  • the cavity A may also be an open cavity.
  • FIG. 4 is a schematic structural diagram of some embodiments of the piezoelectric speaker 10 shown in FIG. 2 cut along A-A.
  • the housing 11 also includes a positioning slot 112 and a fixing hole 113 .
  • the positioning groove 112 is disposed on the top surface 111 , surrounds the opening 110 and communicates with the cavity A.
  • the vibrating assembly 12 includes a positioning protrusion 120 , and the positioning protrusion 120 is limited in the positioning slot 112 so that the vibrating assembly 12 is accurately and stably installed on the casing 11 .
  • the number of fixing holes 113 is four, and the four fixing holes 113 are respectively disposed at four corners of the top surface 111 , and the four fixing holes 113 are located at the periphery of the positioning groove 112 .
  • the vibrating assembly 12 is connected to the fixing hole 113 by screws, so that the vibrating assembly 12 is fixed on the top surface 111 .
  • the number of fixing holes 113 may be one or more, and multiple fixing holes may be arranged at intervals around the periphery of the positioning groove.
  • the housing 11 may not include a fixing hole, and the vibrating assembly 12 may also be fixed to the housing 11 through other connection methods such as bonding and clipping. This application does not apply to the vibrating assembly 12 and The fixing method between the housings 11 is limited.
  • the housing 11 may not include a positioning slot, or the housing 11 may not include a positioning slot and a fixing hole.
  • FIG. 5 is a schematic exploded view of the vibrating assembly 12 in FIG. 3 .
  • the vibrating assembly 12 includes a fixing part 121 , a vibrating membrane 122 and a vibrating source 123 .
  • the fixing part 121 is a hollow frame in the middle, the edge of the vibrating membrane 122 is fixed on the fixing part 121, and the part of the vibrating membrane 122 except the edge is located in the hollowed out place, that is, the middle part of the vibrating membrane 122 is located in the hollowed out place for vibration.
  • the fixing member 121 is fixed on the housing 11 to fix the vibrating assembly 12 to the housing 11 .
  • the vibration source 123 is fixed to the vibrating membrane 122 . Exemplarily, the vibration source 123 is fixed on the side of the vibrating membrane 122 facing the cavity A. As shown in FIG.
  • the vibration source 123 is electrically connected to the power amplifier 32 on the main board 500 .
  • the vibration source 123 is used to generate vibration to drive the vibrating membrane 123 to vibrate.
  • the vibration source 123 can vibrate according to the audio signal sent by the power amplifier 32, so as to drive the vibrating membrane 122 to vibrate to generate sound.
  • the vibration source 123 may also be fixed on the side of the vibrating membrane 122 facing away from the cavity A. As shown in FIG.
  • the fixing part 121 includes a first fixing part 1211 and a second fixing part 1212 oppositely disposed.
  • the second fixing part 1212 is fixedly connected to the first fixing part 1211 .
  • the first fixing part 1211 includes a connected first clamping part 2111 and a first connecting part 2112
  • the second fixing part 1212 includes a connected second clamping part 2121 and a second connecting part 2122 .
  • the first clamping part 2111 and the second clamping part 2121 are arranged oppositely, the diaphragm 122 is clamped between the first clamping part 2111 and the second clamping part 2121, and the first connecting part 2112 and the second connecting part 2122 are fixed , so as to clamp the vibrating membrane 122 between the first clamping portion 2111 and the second clamping portion 2121 .
  • the first fixing part 1211 may not have the first connecting part
  • the second fixing part 1212 may not have the second connecting part
  • the first clamping part 2111 and the second clamping part 2121 are not used.
  • the part that holds the vibrating membrane 122 can be fixed by bonding, clipping or screwing.
  • the first fixing part 1211 is fixed at the opening 110 of the casing 11 , so that the second fixing part 1212 is located on a side of the first fixing part 1211 facing away from the casing 11 .
  • the surface of the first clamping portion 2111 of the first fixing member 1211 facing away from the second clamping portion 2121 is disposed on the top surface 111 of the housing 11 , so that the vibrating membrane 122 fixed on the fixing member 121 covers the opening 110 .
  • the positioning protrusion 120 is formed on the surface of the first clamping portion 2111 facing away from the second clamping portion 2121 , and the positioning protrusion 120 is accommodated in the positioning groove 112 to realize the positioning of the vibrating assembly 12 .
  • first clamping portion 2111 and the second clamping portion 2121 are substantially square plates, and the middle parts of the first clamping portion 2111 and the second clamping portion 2121 are hollowed out.
  • the number of the first connecting parts 2112 is four, and the four first connecting parts 2112 are respectively connected to the four sides of the first clamping part 2111 , and are arranged opposite to each other.
  • the number of the second connecting parts 2122 is also four, and the four second connecting parts 2122 are connected to the four sides of the second locking part 2121 respectively, and are arranged opposite to each other.
  • the four first connecting parts 2112 and the four second connecting parts 2122 are connected in one-to-one correspondence.
  • the number of the first connecting part 2112 and the second connecting part 2122 are four, and they are arranged opposite to each other, so as to ensure the force balance on the four sides of the fixing part 121 .
  • the first connection part 2112 and the second connection part 2122 can be fixed by screwing.
  • the first connecting part 2112 includes a threaded hole
  • the second connecting part 2122 includes a through hole
  • a screw is fixed to the threaded hole of the first connecting part 2112 through the through hole.
  • the first connection part 2112 and the second connection part 2122 may also be fixed by clamping, bonding and other connection methods.
  • FIG. 6 is a structural schematic view of the second fixing member 1212 at another angle in the structure shown in FIG. 5 .
  • the second fixing part 1212 in FIG. 6 is obtained by turning the second fixing part 1212 in FIG. 5 laterally.
  • the first fixing member 1211 includes a first protrusion 2113 formed on a side of the first locking portion 2111 facing away from the positioning protrusion 120 .
  • the second fixing member 1212 includes a second protrusion 2123 formed on a side of the second locking portion 2121 facing the first locking portion 2111 .
  • the first protrusion 2113 and the second protrusion 2123 are arranged oppositely, the vibrating membrane 122 includes a middle part 1221 and an edge part 1223, the middle part 1221 is located inside the edge part 1223, the edge part 1223 includes a clamping part and a non-clamping part, and the clamping part Clamped between the first protrusion 2113 and the second protrusion 2123, the non-clamping part is located on the side of the clamping part away from the middle part 1221, the first protrusion 2113 and the second protrusion 2123 together form a simple support structure, to support the vibrating membrane 122 .
  • the clamping part of the edge part 1223 of the vibrating membrane 122 is clamped between the first protrusion 2113 and the second protrusion 2123, and the non-clamping part is located on the side of the clamping part away from the middle part 1221, that is to say , the edge of the edge portion 1223 is not clamped by the first protrusion 2113 and the second protrusion 2123 .
  • the first protrusion 2113 and the second protrusion 2123 jointly form a simple support structure to support the vibrating membrane 122, the first protrusion 2113 and the second protrusion 2123 only constrain the displacement of the vibrating membrane 122 in the vertical direction, and the vibrating membrane 122
  • the edge portion can rotate with a certain degree of freedom in the vertical direction, and the degree of freedom of the edge portion of the vibrating membrane 122 is released.
  • the degree of freedom of the boundary of the vibrating membrane 122 of the present application is not completely constrained, thereby effectively reducing the vibration of the vibrating membrane 122
  • the energy consumption in the process increases the vibration energy, effectively improves the frequency response sensitivity of the piezoelectric speaker 10, weakens the low-frequency distortion effect of the piezoelectric speaker 10, improves the sound quality of the piezoelectric speaker 10, and improves user experience.
  • FIG. 7 is a schematic diagram comparing the frequency response curves of the piezoelectric speaker 10 of the present application and the traditional piezoelectric speaker.
  • the curve labeled L1 in Fig. 7 is the frequency response curve of the piezoelectric speaker 10 of the present application (supporting the vibrating membrane 122 through a simply supported structure), and the curve labeled L2 is the traditional piezoelectric speaker (the vibrating membrane is fixed to shell) frequency response curve. It can be seen from FIG. 7 that since the piezoelectric speaker 10 of the present application supports the vibrating membrane 122 through a simply supported structure, the energy consumption of the vibrating membrane 122 is lower, and compared with the traditional piezoelectric speaker, the low-frequency and high-frequency sensitivity is significantly improved.
  • the first locking portion 2111 includes a first surface 21 and a second surface 22 opposite to each other, and a first through hole 23 passing through the first locking portion 2111 .
  • the positioning protrusion 120 is formed on the second surface 22, and the first surface 21 is provided with a groove 24 surrounding the hollow, and the groove 24 communicates with the hollow.
  • the first protrusion 2113 is formed on the bottom wall of the groove 24 and is disposed around the hollow. It can also be understood that the two sides of the first protrusion 2113 are provided with avoidance spaces, so that when the first clamping part 2111 clamps the clamping part of the vibrating membrane 122, only the end of the first protrusion 2113 is in contact with the vibrating membrane 122. Contact, to avoid contact with other parts of the vibrating membrane 122, which will affect the degree of freedom of rotation of the vibrating membrane 122.
  • first protrusion 2113 there is one first protrusion 2113 , and one first protrusion 2113 is disposed on the first clamping portion 2111 and surrounds the hollow portion of the first clamping portion 2111 . That is to say, the first protrusion 2113 continuously surrounds the periphery of the vibrating membrane 122 .
  • the first through hole 23 runs through the first surface 21 and the second surface 22 .
  • the number of the first through holes 23 in this embodiment is four, and the four first through holes 23 are respectively located at the four corners of the first clamping portion 2111 .
  • the four first through holes 23 correspond to the four fixing holes 113 of the housing 11 respectively.
  • the first clamping portion 2111 may not be provided with the first through hole.
  • the second clamping portion 2121 includes a clamping surface 25 and a second through hole 26 .
  • the clamping surface 25 is provided with a groove 27 arranged around the hollow, and the groove 27 communicates with the hollow.
  • the second protrusion 2123 is formed on the bottom wall of the groove 27 and is disposed around the hollow. It can also be understood that the two sides of the second protrusion 2123 are provided with avoidance spaces, so that when the second clamping part 2121 clamps the clamping part of the vibrating membrane 122, only the end of the second protrusion 2123 is in contact with the vibrating membrane 122. Contact, to avoid contact with other parts of the vibrating membrane 122, which will affect the degree of freedom of rotation of the vibrating membrane 122.
  • the second protrusion 2123 there is one second protrusion 2123 , and one second protrusion 2123 is disposed on the second clamping portion 2121 and surrounds the hollow portion of the second clamping portion 2121 . That is to say, the second protrusion 2123 continuously surrounds the periphery of the vibrating membrane 122 .
  • the second through hole 26 runs through the clamping surface 25 and the surface opposite to the clamping surface 25 .
  • the number of the second through holes 26 in this embodiment is four, and the four second through holes 26 are respectively located at the four corners of the second clamping portion 2121.
  • the four second through holes 26 are provided in one-to-one correspondence with the four first through holes 23 .
  • the screws sequentially pass through the second through hole 26 and the first through hole 23 to be fixed in the fixing hole 113 of the housing 11 , so as to fix the fixing member 121 to the housing 11 .
  • the second clamping portion 2121 may not be provided with a second through hole, and the fixing member 121 may also be fixed to the housing 11 by other connection methods such as bonding or clamping.
  • first protrusion 2113 and the second protrusion 2123 can have various shapes, and the first protrusion 2113 and the second protrusion 2123 of different shapes can be matched in various ways.
  • first protrusion 2113 and the second protrusion 2123 will be described in detail below in conjunction with related drawings.
  • FIG. 8 is a partially enlarged schematic view of a part of the structure shown in FIG. 4 .
  • the first protrusion 2113 is in surface contact with the vibrating membrane 122 , and the surface of the first protrusion 2113 in contact with the vibrating membrane 122 extends along the periphery of the edge of the vibrating membrane 122 .
  • There is a line contact between the second protrusion 2123 and the vibrating membrane 122 and the line of contact between the second protrusion 2123 and the vibrating membrane 122 extends along the periphery of the edge of the vibrating membrane 122 .
  • the end surface of the first protrusion 2113 facing the end of the vibrating membrane 122 is a plane, that is, the contact surface of the first protrusion 2113 and the edge of the vibrating membrane 122 is a plane, and the width of the plane is greater than or equal to 0.3 mm and less than 3 mm.
  • the surface of the vibrating membrane 122 in contact with the first protrusion 2113 is a plane, so as to realize the surface contact between the first protrusion 2113 and the vibrating membrane 122 .
  • the end surface of the second protrusion 2123 facing the vibrating membrane 122 is an arc surface
  • the part of the second protrusion 2123 in contact with the vibrating membrane 122 is the most protruding part of the arc surface
  • the most protruding part of the arc surface forms a line.
  • the surface of the vibrating membrane 122 in contact with the second protrusion 2123 is a plane, and the vibrating membrane 122 is in contact with the second protrusion 2123 to realize the line contact between the second protrusion 2123 and the vibrating membrane 122 . It can be understood that the width of a line formed by the most protruding part of the arc surface is very narrow.
  • the vibrating membrane 122 can be stably clamped in the first protrusion 2113 and the second protrusion 2123 .
  • the contact surface between the first protrusion 2113 for supporting the vibrating membrane 122 and the vibrating membrane 122 is defined as a plane, so as to ensure that the contact area between the first protrusion 2113 and the vibrating membrane 122 is large enough to ensure that the first protrusion 2113
  • the vibrating membrane 122 can be stably supported.
  • the width of the end surface of the first protrusion 2113 in contact with the vibrating membrane 122 is very narrow, and the width of the end surface is greater than or equal to 0.3mm and less than 3mm, so as to ensure that the width of the end surface is greater than the tolerance of the assembly concentricity, and it is convenient to realize the contact between the first protrusion 2113 and the vibration
  • the assembly of the membrane 122 also ensures that the first protrusion 2113 does not constrain the degree of freedom of the boundary of the vibrating membrane 122 too much.
  • the end surface of the second protrusion 2123 used to cooperate with the first protrusion 2113 to clamp the vibrating film 122 and the vibrating film 122 is designed as a circular arc surface, which can realize the cooperation with the first protrusion 2113 to clamp the vibrating film 122 , and the contact area between the second protrusion 2123 and the vibrating membrane 122 is small, the constraint on the degree of freedom of the boundary of the vibrating membrane 122 is small, the energy loss of the vibrating membrane 122 during the vibration process is small, and the frequency response sensitivity of the piezoelectric speaker 10 is effectively improved , weaken the low-frequency distortion effect of the piezoelectric speaker 10, improve the sound quality of the piezoelectric speaker 10, and improve user experience.
  • FIG. 9 is a structural schematic diagram of another embodiment of the structure shown in FIG. 7 .
  • the end surface where the first protrusion 2113 contacts the vibrating membrane 122 is a plane, and the width of the plane is greater than or equal to 0.3 mm and less than 3 mm.
  • the end of the second protrusion 2123 facing the vibrating membrane 122 is pointed. 2123 The pointed most protruding part, the most pointed part forming a line.
  • the surface of the vibrating membrane 122 in contact with the second protrusion 2123 is a plane, so that there is a line contact between the second protrusion 2123 and the vibrating membrane 122, and the line of contact between the second protrusion 2123 and the vibrating membrane 122 is along the edge of the vibrating membrane 122. Peripheral extension.
  • the degree of freedom constraint of the second protrusion 2123 on the boundary of the vibrating membrane 122 is small, the energy loss of the vibrating membrane 122 during the vibration process is small, and the piezoelectric speaker 10 is effectively improved.
  • the frequency response sensitivity of the piezoelectric speaker 10 is weakened, the low-frequency distortion effect of the piezoelectric speaker 10 is reduced, the sound quality of the piezoelectric speaker 10 is improved, and user experience is improved.
  • the end of the second protrusion 2123 in contact with the vibrating membrane 122 is pointed. Compared with the end surface in contact with the vibrating membrane 122 having an arc surface, the pointed second protrusion 2123 is more inconvenient to assemble.
  • FIG. 10 is a structural schematic diagram of another embodiment of the structure shown in FIG. 7 .
  • the end surface where the first protrusion 2113 contacts the vibrating membrane 122 is a plane, and the width of the plane is greater than or equal to 0.3 mm and less than 3 mm.
  • the second protrusion 2123 is in surface contact with the vibrating membrane 122 , that is, the end surface of the second protrusion 2123 facing the vibrating membrane 122 is a plane.
  • the width of the plane where the second protrusion 2123 is in contact with the vibrating membrane 122 is relatively narrow, which restricts the degree of freedom of the vibrating membrane 122 to a certain extent, but does not restrict the degree of freedom of the boundary of the vibrating membrane 122 too much.
  • both the first protrusion 2113 and the second protrusion 2123 in this embodiment are in surface contact with the vibrating membrane 122, so that the contact area between the vibrating membrane 122 and the first protrusion 2113 and the second protrusion 2123 is relatively large. , the vibrating membrane 122 can be clamped more firmly between the first protrusion 2113 and the second protrusion 2123 .
  • the first protrusion 2113 and the second protrusion 2123 have less constraints on the degree of freedom of the boundary of the vibrating membrane 122, and the energy loss of the vibrating membrane 122 during the vibration process is smaller, effectively improving the frequency response sensitivity of the piezoelectric speaker 10,
  • the low-frequency distortion effect of the piezoelectric speaker 10 is weakened, the sound quality of the piezoelectric speaker 10 is improved, and user experience is improved.
  • FIG. 11 is a structural schematic diagram of another embodiment of the structure shown in FIG. 7 .
  • FIG. 12 is a structural schematic diagram of another embodiment of the structure shown in FIG. 7 .
  • Fig. 13 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7 .
  • the first protrusion 2113 is in line contact with the vibrating membrane 122
  • the second protrusion 2123 is in surface contact with the vibrating membrane 122
  • the surface of the first protrusion 2113 in contact with the vibrating membrane 122 is an arc surface
  • the surface of the second protrusion 2123 in contact with the vibrating membrane 122 is a plane
  • the width of the plane is greater than or equal to 0.3 mm and less than 3 mm.
  • the first protrusion 2113 is in line contact with the vibrating membrane 122
  • the second protrusion 2123 is in line contact with the vibrating membrane 122
  • the surface of the first protrusion 2113 in contact with the vibrating membrane 122 is an arc surface
  • the surface of the second protrusion 2123 in contact with the vibrating membrane 122 is an arc surface.
  • both the first protrusion 2113 and the second protrusion 2123 are in line contact with the vibrating membrane 122, and the positions where the first protrusion 2113 and the second protrusion 2123 contact the vibrating membrane 122 are not easy to align , compared with the scheme in which at least one of the first protrusion 2113 and the second protrusion 2123 is in surface contact with the vibrating membrane 122 , the stability is poorer.
  • the degrees of freedom of the first protrusion 2113 and the second protrusion 2123 to the boundary of the vibrating membrane 122 in this embodiment With smaller constraints, the energy loss of the vibrating membrane 122 during the vibration process is smaller, effectively improving the frequency response sensitivity of the piezoelectric speaker 10, reducing the low-frequency distortion effect of the piezoelectric speaker 10, improving the sound quality of the piezoelectric speaker 10, and improving user experience.
  • first clamping portion 2111 and the second clamping portion 2121 may also be provided with a positioning structure to ensure that the first protrusion 2113 and the second protrusion 2123 are aligned with the vibrating membrane 122 .
  • the first protrusion 2113 is in line contact with the vibrating membrane 122
  • the second protrusion 2123 is in line contact with the vibrating membrane 122
  • the surface of the first protrusion 2113 in contact with the vibrating membrane 122 is an arc surface
  • the end of the second protrusion 2123 in contact with the vibrating membrane 122 is pointed.
  • the first clamping part 2111 and the second clamping part 2121 can also be provided with a positioning structure to ensure that the first protrusion 2113 and the second protrusion 2123 are aligned with the vibrating membrane 122 .
  • FIG. 14 is a structural schematic diagram of another embodiment of the structure shown in FIG. 7 .
  • Fig. 15 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7 .
  • Fig. 16 is a structural schematic diagram of another embodiment of the structure shown in Fig. 7 .
  • the first protrusion 2113 is in line contact with the vibrating membrane 122
  • the second protrusion 2123 is in surface contact with the vibrating membrane 122 .
  • the end of the first protrusion 2113 in contact with the vibrating membrane 122 is pointed
  • the surface of the second protrusion 2123 in contact with the vibrating membrane 122 is a plane
  • the width of the plane is greater than or equal to 0.3 mm and less than 3 mm.
  • the first protrusion 2113 is in line contact with the vibrating membrane 122
  • the second protrusion 2123 is in line contact with the vibrating membrane 122 .
  • the end of the first protrusion 2113 in contact with the vibrating membrane 122 is pointed
  • the surface of the second protrusion 2123 in contact with the vibrating membrane 122 is an arc surface.
  • the end of the first protrusion 2113 in contact with the vibrating membrane 122 is pointed, and the end of the second protrusion 2123 in contact with the vibrating membrane 122 is pointed.
  • the first protrusion 2113 and the second protrusion 2123 are made of elastic material, so that the first protrusion 2113 and the second protrusion 2123 will not be due to the relatively large hardness during the process of clamping the vibrating membrane 122 Damage occurs to the vibrating membrane 122 .
  • FIG. 17 is a structural schematic diagram of another angle of the vibrating membrane 122 and other structures in the structure shown in FIG. 5 .
  • the structures such as vibration in FIG. 17 are obtained by laterally flipping the structures such as the vibrating membrane 122 in FIG. 5 .
  • the vibrating membrane 122 is roughly a rectangular pure aluminum metal diaphragm. On the one hand, the vibrating membrane is used for vibrating and sounding, and on the other hand, it can also be sealed with the housing 11 to avoid short-circuiting of the sound on both sides of the vibrating membrane 122 .
  • the vibrating membrane 122 further includes a connecting portion 1222 , and the connecting portion 1222 of the vibrating membrane 122 is connected between the middle portion 1221 of the vibrating membrane 122 and the edge portion 1223 of the vibrating membrane 122 .
  • the vibration source 123 is fixed at the middle portion 1221 of the vibrating membrane 122 .
  • the vibrating membrane 122 may be a non-metal diaphragm, a double-layer diaphragm formed by bonding a metal diaphragm and a non-metal diaphragm, or a metal and non-metal composite diaphragm.
  • the vibration source 123 can be fixed to the middle portion 1221 of the vibrating membrane 122 through the vibration transmission adhesive layer 124 ( FIG. 4 ).
  • the vibration source 123 transmits the vibration to the vibrating membrane 122 through the vibration transmission adhesive layer 124 . That is to say, the vibration transmission adhesive layer 124 can not only fix the vibration source 123 to the vibrating membrane 122 , but also transmit the vibration to the vibrating membrane 122 .
  • the vibration-transmitting adhesive layer 124 may be an adhesive layer, polyethylene terephthalate, or a sandwich-structure adhesive of the adhesive layer.
  • glue can also be used to transmit the vibration of the vibration source 123 to the vibrating membrane 122 .
  • the non-clamping portion of the edge portion 1223 of the vibrating membrane 122 protrudes from the side of the first protrusion 2113 and the second protrusion 2123 away from the middle portion 1221 of the vibrating membrane 122 ( FIG. 5 ).
  • the first protrusion 2113 and the second protrusion 2123 only limit the displacement of the vibrating membrane 122 in the vertical direction, but do not limit the displacement of the vibrating membrane 122 in the horizontal direction, so when the vibrating membrane 122 vibrates, it will The edge portion 1223 of the diaphragm 122 is pulled toward the middle portion 1221 .
  • the non-clamping part of the vibrating film 122 protrudes from the side of the first protrusion 2113 and the second protrusion 2123 away from the middle part 1221 of the vibrating film 122, so that even if the vibrating film 122 vibrates, the edge part 1223 will Moving toward the middle portion 1221 will not break away from the clamping of the first protrusion 2113 and the second protrusion 2123 .
  • the vibration source 123 is a piezoelectric sheet.
  • the piezoelectric sheet and the vibration source 123 have the same reference numerals.
  • the piezoelectric sheet 123 is fixed to the middle part 1221 of the vibrating membrane 122 through the vibration transmission adhesive layer 124 , and is located on the side of the vibrating membrane 122 facing the housing 11 . That is to say, the piezoelectric sheet 123 is located in the cavity A. As shown in FIG.
  • the piezoelectric sheet 123 is made of single-crystal or twin-crystal piezoelectric ceramics, and the number of layers, stack thickness and external dimensions of the piezoelectric sheet 123 can be set according to actual needs.
  • the positive and negative lines are electrically connected between the piezoelectric sheet 123 and the power amplifier 32 , so that the power amplifier 32 is connected to the piezoelectric sheet 123 , and the piezoelectric sheet 123 vibrates according to the signal transmitted by the power amplifier 32 .
  • the positioning protrusion 120 of the first fixing member 1211 is provided with two wire through holes B, so that the two lines connected to the piezoelectric sheet 123 can extend out of the cavity through the wire through holes B Body A is electrically connected to a power amplifier 32 .
  • the number of wire through holes B is not limited to two, and may also be one or more than two.
  • the piezoelectric sheet 123 may also be connected to the power amplifier 32 through an electrical connection structure other than a circuit, such as a flexible circuit board.
  • the vibration source 123 may also be a vibration source such as a magnetostrictive element or an electric actuator.
  • the vibrating assembly 12 further includes a first counterweight 125 , and the first counterweight 125 is fixed to the middle part 1221 of the vibration source 123 .
  • the first counterweight 125 is fixed at the middle portion 1221 of the piezoelectric sheet 123 .
  • the first counterweight 125 can be a metal counterweight, a non-metal counterweight or a composite of metal and non-metal.
  • the material of the metal counterweight can be steel, copper, tungsten, aluminum and other pure metals and their alloy materials
  • the material of the non-metallic counterweight can be non-metallic such as plastic, polymethacrylimide foam, glue, etc. Material.
  • the first counterweight 125 can be bonded and fixed to the piezoelectric sheet 123 by glue (ultraviolet light curing glue or hot melt glue or two-component glue).
  • glue ultraviolet light curing glue or hot melt glue or two-component glue.
  • the shape of the first counterweight 125 can be a cube, a cylinder, a cone, a special-shaped body, and the like.
  • the first counterweight 125 may also be an annular structure with a cross-section of an axisymmetric shape such as a rectangle, a trapezoid, or a triangle.
  • the number of the first counterweight 125 is one, and it is arranged in the middle part 1221 of the piezoelectric sheet 123, so that when the piezoelectric sheet 123 bends and vibrates, the first counterweight 125 can reduce the piezoelectricity by its own weight.
  • the bending vibration amplitude of the central area of the sheet 123 enables the energy to be transmitted to the edge area of the piezoelectric sheet 123 and increases the overall vibration amplitude of the piezoelectric sheet 123 .
  • the first counterweight 125 can achieve the purpose of suppressing the unbalanced amplitude of the central area and the edge area of the piezoelectric sheet 123, and the situation that the vibration directions of the central area and the edge area are opposite to each other disappears accordingly, so that the piezoelectric sheet 123 is more inclined to The piston vibrates to finally achieve the effect of improving the low-frequency sensitivity of the piezoelectric speaker 10 .
  • the number of the first counterweights 125 can also be multiple, and the multiple first counterweights 125 are symmetrically pasted on the corresponding regions of the piezoelectric sheet 123 .
  • the weight of the first counterweight 125 of different types of piezoelectric speakers 10 may be different. Specifically, the weight of the first counterweight 125 can be set according to the requirement of the resonance frequency of the piezoelectric speaker 10 .
  • FIG. 18 is a schematic diagram of the vibration amplitude of the piezoelectric speaker 10 without the first counterweight 125 .
  • FIG. 19 is a schematic diagram of the vibration amplitude when the piezoelectric speaker 10 is provided with the first weight 125 .
  • the left side of FIG. 18 is a 3D amplitude schematic diagram of the piezoelectric speaker 10 without the first counterweight 125
  • the right side of FIG. 18 is a 2D amplitude schematic diagram of the piezoelectric speaker 10 without the first counterweight 125
  • the left side of FIG. 19 is a 3D amplitude schematic diagram when the piezoelectric speaker 10 is provided with the first counterweight 125
  • the right side of FIG. 19 is a 2D amplitude schematic diagram when the piezoelectric speaker 10 is provided with the first counterweight 125
  • the line labeled L3 on the right side of Figure 18 is the standard line
  • the line labeled L4 is the curve when the piezoelectric sheet vibrates.
  • the line labeled L5 on the right side of FIG. 19 is the standard line
  • the line labeled L6 is the curve when the piezoelectric sheet 123 vibrates.
  • the piezoelectric sheet 123 exhibits arched bending vibration when vibrating, that is, the central region of the piezoelectric sheet 123 has a large amplitude and the edge region has a low amplitude.
  • adding the first counterweight 125 to the central area of the piezoelectric sheet 123 increases the vibration mass of the central area, suppresses the amplitude of the central area, increases the amplitude of the edge area, and can also improve the phenomenon that the vibration directions of the central area and the edge area are different, thereby suppressing
  • the vibration amplitude of different regions caused by the bending vibration of the piezoelectric sheet 123 is unbalanced.
  • the piezoelectric sheet 123 is optimized from the bending vibration to the approximate piston movement, which increases the effective vibration area, so the low-frequency sensitivity is improved, and the resonance frequency of the speaker is moved forward.
  • the vibrating assembly 12 further includes a second counterweight 126 , and the second counterweight 126 is fixed to the vibrating membrane 122 .
  • the second counterweight 126 can be fixed on the side of the vibrating membrane 122 facing the vibration source 123 , of course, the second counterweight 126 can also be arranged on the side of the vibrating membrane 122 facing away from the vibration source 123 .
  • the second counterweight 126 can be fixed to the vibrating membrane 122 by glue bonding, adhesive backing (double-sided tape), welding, riveting, etc., or can be integrally formed with the vibrating membrane 122 .
  • the number of the second counterweights 126 is four, and the four second counterweights 126 are arranged around the vibration source 123 and are arranged close to the vibration source 123 .
  • the number of second counterweights 126 can also be other than four.
  • the second counterweight 126 can also be a ring, which is set close to or around the vibration source 123 .
  • the frequency response curve of the piezoelectric speaker 10 has many peaks and valleys, and the distortion is large.
  • the second counterweight 126 is fixed to the vibrating membrane 122 to increase the damping effect of the vibrating membrane 122, change the vibration mode of the vibrating membrane 122, and improve the resonance, thereby reducing the mechanical quality factor of the piezoelectric speaker 10.
  • the piezoelectric speaker 10 significantly improves the problem of many peaks and valleys and large distortion in the frequency response curve of the piezoelectric speaker 10 , making the frequency response curve flat.
  • FIG. 20 is a graph showing the influence of different positions of the second weight member 126 on the vibrating membrane 122 on the resonance of the piezoelectric speaker 10 . It can be seen from FIG. 20 that as the distance between the second counterweight 126 on the vibrating membrane 122 and the vibration source 123 increases, the resonance frequency of the piezoelectric speaker 10 increases, so the distance between the second counterweight 126 and the second counterweight 126 can be set according to the required resonance frequency. Vibration source 123 distance.
  • the weight of the second counterweight 126 can be set according to the requirement of the resonance frequency of the piezoelectric speaker 10 .
  • the second counterweight 126 is disposed on the connecting portion 1222 of the vibrating membrane 122, the second counterweight 126 is disposed close to the middle portion 1222 of the vibrating membrane 122, the connecting portion 1222 includes a first width W, and the second counterweight 126 is located between 1/4 of the first width W ⁇ 1/3 of the first width W ( FIG. 4 ).
  • the sound effect of the piezoelectric speaker 10 is improved by defining that the second weight member 126 is disposed close to the middle portion 1222 of the vibrating membrane 122 and located between 1/4 of the first width W ⁇ 1/3 of the first width W.
  • the material of the second counterweight 126 may be butyl glue, damping glue, photosensitive resin, metal and so on.
  • the material of the second counterweight 126 may also be the same as that of the first counterweight 125 .
  • the shape of the second counterweight 126 can be a cube, a cylinder, a cone, a special-shaped body, and the like.
  • the second counterweight 126 may also be an annular structure with a cross-section of an axisymmetric shape such as a rectangle, a trapezoid, or a triangle.
  • the second counterweight 126 can be bonded to the vibrating membrane 122 by glue, and the glue can be, for example, ultraviolet curing glue, hot melt glue or two-component glue.
  • the second counterweight 126 can also be fixed to the vibrating membrane 122 by adhesive, welding and other connection methods.
  • the vibration assembly 12 may further include one of the first counterweight 125 and the second counterweight 126 .
  • FIG. 21 is a schematic diagram of a comparison between the piezoelectric speaker 10 of the present application and the traditional piezoelectric speaker 10 .
  • the piezoelectric speaker 10 of the present application including the first counterweight 125 and the second counterweight 126, supporting the diaphragm 122 through a simple support structure
  • the traditional piezoelectric speaker 10 not including the first counterweight Part and the second counterweight, the vibrating membrane is directly fixed to the housing
  • L7 and L8 are the frequency response curves of the piezoelectric speaker 10 of the present application and the traditional speaker respectively
  • L9 and L10 are the distortion curves of the piezoelectric speaker 10 of the present application and the traditional speaker respectively.
  • the evaluation frequency point of the low-frequency characteristics of the piezoelectric speaker 10 is 200 Hz.
  • the low-frequency improvement of the piezoelectric speaker 10 scheme in this implementation case is 6.5dB to 12.2dB.
  • the higher the low-frequency sensitivity the stronger the low-frequency expressiveness of the piezoelectric speaker 10 of this application. , the better the sense of hearing.
  • the frequency response curve of the piezoelectric speaker 10 of the present application is compared with the frequency response curve of the traditional piezoelectric speaker 10.
  • Conventional moving coil speakers are far thinner than dynamic speakers, achieving the acoustic characteristics of conventional moving coil speakers with the same radiation area size.
  • the piezoelectric speaker 10 of the present application significantly optimizes the high-frequency and low-frequency total harmonic distortion of the frequency response curve, and the high-frequency total harmonic distortion is reduced from 30% to 8.4 %, low-frequency THD dropped from 95% to 48%.
  • the vibrating membrane 122 is supported by a simple support structure to reduce the constraints on the degree of freedom of the vibrating membrane 122.
  • the inherent characteristics of the piezoelectric speaker 10 are optimized through the cooperation of the counterweight with the vibrating membrane 122 and the vibration source 123. , reducing the low-frequency and high-frequency vibration noise and distortion of the piezoelectric speaker 10, so that it has a listening experience comparable to or even better than that of a conventional dynamic speaker.
  • FIG. 22 is a structural schematic diagram of another embodiment of the piezoelectric speaker 10 shown in FIG. 2 .
  • FIG. 23 is a schematic diagram of an exploded structure of the vibration assembly 12 of the piezoelectric speaker 10 shown in FIG. 22 .
  • Fig. 24 is a schematic cross-sectional view of the structure shown in Fig. 22 along the B-B direction.
  • the structure of the piezoelectric speaker 10 in this embodiment is substantially the same as that of the piezoelectric speaker 10 shown in FIG. 2 , and the same parts will not be repeated here.
  • the difference is that the structure of the fixing part 121 of the vibrating assembly 12 in this embodiment is slightly different.
  • the number of the first protrusions 2113 in this embodiment is four, and the four first protrusions 2113 are arranged at intervals on the first clamping portion 2111 and surround the hollow portion of the first clamping portion 2111 .
  • the number of the second protrusions 2123 is also four, and the four second protrusions 2123 are arranged at intervals on the second clamping portion 2121 and surround the hollow portion of the second clamping portion 2121 .
  • the four first protrusions 2113 and the four second protrusions 2123 are provided in one-to-one correspondence to clamp the edge portion 1223 of the vibrating membrane 122 . That is to say, part of the edge portion 1223 of the diaphragm 122 is clamped between the first protrusion 2113 and the second protrusion 2123, that is, the first protrusion 2113 and the second protrusion 2123 discontinuously surround the diaphragm 122 The edge portion 1223 of.
  • the number of the first protrusions 2113 and the second protrusions 2123 may also be other numbers than four.
  • FIG. 25 is a schematic cross-sectional view of the structure shown in FIG. 22 along the C-C direction.
  • edge portion 1223 of the vibrating membrane 122 is clamped between the first protrusion 2113 and the second protrusion 2123 (as shown in FIG. 24 ), and the edge portion 1223 of the vibrating membrane 122 is not clamped by the first protrusion 2113 and the second protrusion 2123 (as shown in FIG. 24 ).
  • the protrusion 2113 and the second protrusion 2123 are clamped, but are in a suspended state (as shown in FIG. 25 ).
  • the four first protrusions 2113 and the four protrusions respectively clamp the four corners of the edge portion 1223 of the vibrating membrane 122 , so as to support the position-limiting vibrating membrane 122 more stably.
  • the first protrusion 2113 and the second protrusion 2123 are not limited to only clamp the four corners of the vibrating membrane 122 , or can also clamp other places of the edge portion 1223 of the vibrating membrane 122 .
  • FIG. 26 is a schematic structural diagram of another embodiment of the piezoelectric speaker 10 shown in FIG. 2 .
  • FIG. 27A is a schematic cross-sectional structure diagram of the piezoelectric speaker 10 shown in FIG. 26 along the D-D direction.
  • the structure of the piezoelectric speaker 10 in this embodiment is substantially the same as that of the piezoelectric speaker 10 shown in FIG. 2 , and the same parts will not be repeated here.
  • the vibrating assembly 12 in this embodiment further includes an elastic connecting member 127 , one end of the elastic connecting member 127 is connected to the fixing member 121 , and the other end is connected to the vibrating membrane 122 .
  • one end of the elastic connecting member 127 in this embodiment may be connected to the first fixing member 1211 and the other end may be connected to the vibrating membrane 122 , or one end may be connected to the second fixing member 1212 and the other end may be connected to the vibrating membrane 122 .
  • the first fixing member 1211 and the vibrating membrane 122 and between the second fixing member 1212 and the vibrating membrane 122 may also be connected by elastic connecting members 127 .
  • the simply supported structure supports the vibrating membrane 122.
  • the simply supported structure does not fully restrict the degrees of freedom of the vibrating membrane 122, the piezoelectric speaker 10 will There is a problem of poor pure sound, and the noise generated by the vibrating membrane 122 beating the first protrusion 2113 and the second protrusion 2123 can be heard.
  • the present application connects the vibrating membrane 122 and the fixing member 121 (the first fixing member 1211 and/or the second fixing member 1212 ) by setting the elastic connecting member 127 to connect the vibrating membrane 122 and the fixing member 121 .
  • the elastic connector 127 has a certain degree of elasticity, connecting the vibrating membrane 122 and the fixing member 121 can ensure that the degree of freedom of the vibrating membrane 122 is not constrained by the elastic connector 127, does not change the frequency response curve of the piezoelectric speaker 10, and avoids
  • the vibrating membrane 122 beats the first protrusion 2113 and the second protrusion 2123, avoiding the generation of noise, avoiding the generation of noise, and improving the full-frequency pure tone.
  • FIG. 27B is a partial structural diagram of the structure shown in FIG. 27A .
  • one end of the elastic connecting member 127 is connected to the first protrusion 2113 of the first fixing member 1211 , and the other end is connected to the vibrating membrane 122 .
  • one end of the elastic connecting member 127 is connected to the part of the first protrusion 2113 that is not in contact with the vibrating membrane 122 .
  • the first protrusion 2113 includes two first side 81 and second side 82 opposite to each other, the first side 81 is close to the middle part 1221 , the second side 82 is away from the middle part 1221 , the first side 81 and the second side 82 It is not in contact with the vibrating membrane 122 .
  • One end of the elastic connecting member 127 is connected to the first side 81 , and the other end is connected to the vibrating membrane 122 .
  • the first side 81 forms a groove, and one end of the elastic connecting member 127 is connected to the groove wall of the groove, and the other end is connected to the vibrating membrane 122 . Since the first side 81 forms a groove, the elastic connecting member 127 is partially accommodated in the groove, and the groove has a certain positioning effect on the elastic connecting member 127 , so that the elastic connecting member 127 is stably connected to the first side 81 .
  • the groove can be formed by designing the first side 81 as a concave curved surface, or forming a groove on the first side 82 , or forming a groove near the first side 81 on the first fixing member.
  • the first side 81 can also be a convex curved surface, a plane or a surface with different concavities and convexities.
  • one end of the elastic connecting member 127 may also be connected to the second side 82 , and the other end may be connected to the vibrating membrane 122 .
  • the second side 82 may form a groove, or the second side 82 may be one of a concave curved surface, a convex curved surface, a plane or an uneven surface.
  • the first side 81 and the second side 82 can also be respectively connected to the vibrating membrane 122 through elastic connecting members 127 .
  • the first side 81 and the second side 82 can respectively form grooves, or the first side 81 and the second side 82 can respectively be one of concave curved surface, convex curved surface, plane or uneven surface.
  • one end of the elastic connecting member may also be connected to the second protrusion of the second fixing member, and the other end may be connected to the vibrating membrane.
  • the elastic connecting piece connects the part of the second protrusion not in contact with the vibrating membrane.
  • the second protrusion also includes two opposite sides, and the elastic connecting member may have one end connected to one side of the second protrusion, and the other end connected to the vibrating membrane. Or both sides of the second protrusion are respectively connected to the vibrating membrane through elastic connecting pieces.
  • the elastic connecting member may also be connected between the first protrusion of the first fixing member and the vibrating membrane.
  • the elastic connecting member may also be connected between the second protrusion of the second fixing member and the vibrating membrane.
  • the elastic connecting member 127 is ring-shaped damping glue, and the periphery of the edge portion 1223 of the vibrating membrane 122 is connected to the fixing member 121 through the damping glue 127 .
  • the damping glue 127 can be connected between the vibrating membrane 122 and the fixing part 121 by coating.
  • the damping glue 127 may be formed by applying glue between the vibrating membrane 122 and the fixing member 121 and then curing the glue with ultraviolet light, that is, curing the glue by ultraviolet light irradiation.
  • the cured damping glue 127 has a low hardness within the shore (00) viscosity range and a low tensile strength, usually less than 1 MPa (commonly tens of MPa for conventional glue), so as to ensure that the degree of freedom of the vibrating membrane 122 is not restricted by the damping glue 127.
  • the vibrating membrane may also be partially connected to the fixing member through damping glue.
  • the elastic connecting piece can also be other elastic connecting structures other than damping glue, such as elastic connecting foam, etc., as long as it can connect the vibrating membrane and the first fixing piece (or the second fixing piece), so that the vibrating membrane can vibrate It is sufficient that the first protrusion and the second protrusion are not flapped and the degrees of freedom of the vibrating membrane are not restricted.
  • the vibrating assembly 12 of the piezoelectric speaker 10 shown in FIG. 22 may also include an elastic connecting piece connected between the vibrating membrane 122 and the fixing piece 121 .
  • FIG. 28 is a structural schematic diagram of another embodiment of the piezoelectric speaker 10 shown in FIG. 2 .
  • FIG. 29 is a schematic diagram of an exploded structure of the piezoelectric speaker 10 shown in FIG. 28 .
  • the structure of the piezoelectric speaker 10 in this embodiment is substantially the same as that of the piezoelectric speaker 10 shown in FIG. 2 , and the same parts will not be repeated here.
  • the first fixing member 1211 and the casing 11 are integrally formed.
  • the first fixing member 1211 and the housing 11 can be formed by insert molding and other processes. Due to the integrated structure of the first fixing part 1211 and the casing 11 , the steps of assembling the first fixing part 1211 to the casing 11 are reduced, and the production efficiency of the product is improved.
  • FIG. 30 is a schematic structural diagram of another embodiment of the piezoelectric speaker 10 shown in FIG. 2 .
  • the structure of the piezoelectric speaker 10 in this embodiment is substantially the same as that of the piezoelectric speaker 10 shown in FIG. 2 , and the same parts will not be repeated here.
  • the difference is that the housing 11 in this embodiment is cylindrical, and the corresponding vibrating assembly 12 is also circular.
  • the circular piezoelectric speaker 10 can be used in headphone products or other products. Of course, in other embodiments, the piezoelectric speaker 10 can also be set in different shapes as required.
  • FIG. 31 is a schematic cross-sectional structure diagram of another embodiment of the piezoelectric speaker 10 shown in FIG. 30 .
  • FIG. 32 is a schematic plan view of a partial structure of the piezoelectric speaker 10 shown in FIG. 31 .
  • the structure of the piezoelectric speaker 10 in this embodiment is substantially the same as that of the piezoelectric speaker 10 shown in FIG. 31 , and the same parts will not be repeated here.
  • the difference is that the middle part of the vibrating membrane 122 in this embodiment is hollowed out.
  • the position corresponding to the hollowing out of the vibrating membrane 122 in the vibration transmission adhesive layer 124 in this application is also hollowed out.
  • the middle part of the vibrating membrane 122 as a hollow structure, the bonding area between the vibrating membrane 122 and the vibration source 123 can be reduced, and the constraint of the bonding on the vibration of the vibration source 123 can be reduced, thereby reducing the energy dissipation of the vibration source 123.
  • the vibrating membrane 122 may not be hollowed out.
  • the first counterweight is not provided, and the second counterweight 126 a is provided on the side of the vibrating membrane 122 away from the vibration source 123 .
  • the second counterweight 126a is a ring structure.
  • the second counterweight 126a is made of white rigid photosensitive resin material, which can be bonded to the vibrating membrane 122 through adhesive, or can be fixed to the vibrating membrane 122 through glue.
  • the vibrating membrane 122 is used to improve the high-frequency peaks and valleys of the frequency response curve, reduce low-frequency distortion, and achieve a level where the distortion of the entire frequency band is lower than 2%, thereby improving the user's sense of hearing.
  • the second counterweight can also be a plurality of block-shaped pieces, and the multiple block-shaped pieces are arranged at intervals on the vibrating membrane 122 .
  • FIG. 33 is a comparison diagram between the piezoelectric speaker 10 in the present application and the traditional piezoelectric speaker 10 .
  • the piezoelectric speaker 10 of the present application (including the second counterweight 126) and the traditional piezoelectric speaker 10 (not including the second counterweight 126) were tested under the same test conditions (AC voltage, anechoic chamber free field environment) It is the same as 100Hz ⁇ 20kHz frequency sweep signal, etc.) test.
  • L11 and L12 are the distortion curves of the conventional piezoelectric speaker 10 and the piezoelectric speaker 10 of the present application, respectively.
  • the piezoelectric speaker 10 of the present application reduces the distortion at the 30Hz frequency point from 4.5% to 1.8%, and reduces the distortion at the 260Hz frequency point from 2.7% to 1.2%.
  • the electric speaker 10 distorts at low frequencies, reaching the level of earphone speaker distortion.
  • FIG. 34 is a schematic structural diagram of another embodiment of the electronic device 1000 shown in FIG. 1 .
  • FIG. 35 is a schematic diagram of an exploded structure of a partial structure of the structure shown in FIG. 34 .
  • the structure of the electronic device 1000 in this embodiment is substantially the same as that of the electronic device 1000 shown in FIG. 1 , and the same parts will not be repeated here.
  • the difference is that the cavity of the piezoelectric speaker 10 a in this embodiment is composed of a housing 11 a and a vibrating assembly 12 , wherein the housing 11 a may be a part of the housing 100 . That is to say, the cavity of the piezoelectric speaker 10a is composed of the vibrating assembly 12 and the housing 100 .
  • the housing 100 includes a frame 1001 , a rear cover 1002 and a surrounding wall 1004 .
  • the frame 1001 is connected to the edge of the back cover 1002, and the wall 1004 is connected to the surface of the back cover 1002 facing the display module 200, and forms the housing 11 of the piezoelectric speaker 10 as shown in FIG. 2 with the back cover 1002, and the vibration component 12 is connected to the wall 1004 faces away from the side of the rear cover 1002 to form a cavity of the piezoelectric speaker 10 a together with the surrounding wall 1004 and the rear cover 1002 .
  • the cavity part of the piezoelectric speaker 10a in this embodiment is formed by the partial structure of the rear cover 1002, and the rear cover 1002 is effectively used to form the housing 11a, reducing the pressure.
  • the electric speaker occupies the space of the electronic device 1000 , which is beneficial to the thinning of the electronic device 1000 .
  • the frame 1001 and the rear cover 1002 may be integrally formed, or may be assembled to form an integral structure.
  • the enclosure wall 1004 and the rear cover 1002 may be integrally formed, or may be assembled to form an integral structure.
  • the housing 11 a may also be a part of the frame 1001 or the main board 500 .
  • the housing 100 may also include a middle frame, and the housing 11a is a part of the middle frame.
  • the first fixing part of the vibrating assembly 12 can be integrally formed with the casing 11a. That is to say, the first fixing part can be integrally formed with the rear cover 1002 , which reduces the steps of fixing the first fixing part to the casing 11 a (the back cover 1002 ), and improves the production efficiency of the product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

本申请提供一种压电扬声器以及电子设备。所述压电扬声器包括第一固定件、第二固定件、振动膜以及振源，所述第二固定件固定连接所述第一固定件，所述第一固定件包括第一凸起，第二固定件包括第二凸起，所述第二凸起与所述第一凸起相对设置，所述振动膜包括中部和边缘部，所述中部位于所述边缘部的内侧，所述边缘部包括夹持部分和非夹持部分，所述夹持部分夹持于所述第一凸起和所述第二凸起之间，所述非夹持部分位于所述夹持部分背离所述中部的一侧，所述第一凸起和所述第二凸起共同形成简支支撑结构，以支撑所述振动膜，所述振源与所述振动膜相固定。本申请的压电扬声器能量耗损小，音质好。

Description

压电扬声器以及电子设备
本申请要求于2021年06月30日提交中国专利局、申请号为202110738523.6、申请名称为“压电扬声器以及电子设备”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
本申请涉及扬声器技术领域，尤其涉及到一种压电扬声器以及电子设备。
背景技术
压电扬声器在消费者电子产品中应用广泛。压电扬声器具有纤薄的结构特征，在超薄类终端产品中的应用具备得天独厚的优势和价值。压电扬声器通常由壳体、振动膜、振源构成。但是，压电扬声器的边界能量损耗大，音质差。
发明内容
本申请实施例提供一种压电扬声器以及包括压电扬声器的电子设备，旨在获得一种能量耗损小，音质好的压电扬声器。
第一方面，提供了一种压电扬声器。压电扬声器包括第一固定件、第二固定件、振动膜以及振源，第二固定件固定连接第一固定件，第一固定件包括第一凸起，第二固定件包括第二凸起，第二凸起与第一凸起相对设置，振动膜包括中部和边缘部，中部位于边缘部的内侧，边缘部包括夹持部分和非夹持部分，夹持部分夹持于第一凸起和第二凸起之间，非夹持部分位于夹持部分背离中部的一侧，第一凸起和第二凸起共同形成简支支撑结构，以支撑振动膜，振源与振动膜相固定。
本申请中的振动膜的夹持部分夹持于第一凸起和第二凸起之间，非夹持部分位于夹持部分背离中部的一侧，也就是说，边缘部的边缘未被第一凸起和第二凸起夹持。第一凸起和第二凸起共同形成简支支撑结构，以支撑振动膜，第一凸起和第二凸起仅约束振动膜在垂直方向的位移，振动膜的边缘部可在垂直方向具有一定自由度的转动，振动膜的边缘部的自由度释放。可以理解的是，振动膜的自由度约束越多，能量消耗越快。相比于将振动膜的边缘固定至壳体上，振动膜的边缘自由度被完全约束的方案，本申请的振动膜的边界的自由度没有被完全约束，从而有效降低振动膜在振动过程中的能量耗损，提升振动能量，有效提升压电扬声器的频响灵敏度，减弱压电扬声器低频失真效应，提高压电扬声器的音质，提高用户体验。
一种可能的实现方式中，述振动组件还包括弹性连接件，弹性连接件一端连接第一固定件，另一端连接振动膜；或弹性连接件一端连接第二固定件，另一端连接振动膜。
可以理解的是，简支支撑结构支撑振动膜，相对于相关技术中将振动膜固定于壳体的方案，由于简支支撑结构对振动膜的自由度未完全约束，压电扬声器会存在纯音不良的问题，可听见振动膜拍打第一凸起和第二凸起产生的杂音。
鉴于此，本申请通过设置弹性连接件连接振动膜和固定件(第一固定件和/或第二固定件)，以连接振动膜和固定件。由于弹性连接件具有一定弹性，连接振动膜和固定件，既能保证振动膜的自由度不被弹性连接件约束，不会改变压电扬声器的频响曲线，还能避免振动膜拍打第一凸起和第二凸起，避免了杂音的产生，避免了杂音的产生，起到改善全频纯音的作用。
一种可能的实现方式中，弹性连接件一端连接第一凸起，另一端连接振动膜。通过弹性 连接件粘接第一凸起和振动膜，以使振动膜不会拍打第一凸起和第二凸起，避免了杂音的产生。
一种可能的实现方式中，第一凸起包括相背对设置的第一侧面和第二侧面，第一侧面靠近中部，第二侧面背离中部，弹性连接件一端连接第一侧面，另一端连接振动膜；或者，弹性连接件一端连接第二侧面，另一端连接振动膜。
一种可能的实现方式中，第一凸起包括相背对设置的第一侧面和第二侧面，第一侧面靠近中部，第二侧面背离中部，第一侧面形成凹槽，弹性连接件一端连接于凹槽的槽壁，另一端连接振动膜。由于第一侧面形成凹槽，弹性连接件部分收容于凹槽，凹槽对弹性连接件有一定限位作用，使得弹性连接件稳定的连接于第一侧面。
一种可能的实现方式中，弹性连接件为阻尼胶。由于阻尼胶具有一定弹性，连接振动膜和第一固定件(或第二固定件)，既能保证振动膜的自由度不被阻尼胶约束，不会改变压电扬声器的频响曲线，还能避免振动膜拍打第一凸起和第二凸起，避免了杂音的产生，避免了杂音的产生，起到改善全频纯音的作用。
一种可能的实现方式中，弹性连接件为环状，也就是说，振动膜的边缘部的周缘均通过阻尼胶连接至固定件，从而能有效避免振动膜拍打第一凸起和第二凸起，避免了杂音的产生，避免了杂音的产生，起到改善全频纯音的作用。当然，在其他实施例中，振动膜还可以局部通过阻尼胶连接于第一固定件(或第二固定件)。
一种可能的实现方式中，第一凸起和第二凸起采用弹性材料制成，从而第一凸起和第二凸起在夹持振动膜的过程中不会因为硬度较大对振动膜产生损坏。
一种可能的实现方式中，第一凸起和振动膜之间为线接触，第一凸起和振动膜接触的线沿边缘部的周缘延伸。第一凸起与振动膜接触的部分形成一条线，振动膜与第一凸起接触的面为平面，以实现第一凸起和振动膜之间的线接触。
可以理解的是，第一凸起与振动膜接触的面积越小，对振动膜的边界的自由度约束越小，振动膜在振动过程中的能量耗损越小。通过限制第一凸起与振动膜之间为线接触，减少第一凸起与振动膜接触的面积，从而减小第一凸起对振动膜的边界的自由度约束，振动膜在振动过程中的能量耗损小，有效提升压电扬声器的频响灵敏度，减弱压电扬声器低频失真效应，提高压电扬声器的音质，提高用户体验。
一种可能的实现方式中，第一凸起朝向振动膜的一端为尖状，或者第一凸起朝向振动膜的一端的端面为圆弧面。
一种可能的实现方式中，第一凸起和振动膜之间为面接触，第一凸起和振动膜接触的面沿边缘部的周缘延伸。第一凸起与振动膜的边缘部接触表面为平面，振动膜与第一凸起接触的面为平面，以实现第一凸起和振动膜之间的面接触。
通过将用于支撑振动膜的第一凸起与振动膜接触的面限定为平面，从而保证第一凸起和振动膜的接触面积足够大，保证第一凸起能够稳定支撑振动膜。可以理解的是，第一凸起与振动膜接触的端面宽度很窄，对振动膜的自由度有一定约束，但是不会对振动膜的边界的自由度约束过大。
一种可能的实现方式中，第二凸起和振动膜之间为线接触，第二凸起和振动膜接触的线沿边缘部的周缘延伸。通过限制第二凸起与振动膜之间为线接触，减少第二凸起与振动膜接触的面积，从而减小第二凸起对振动膜的边界的自由度约束，振动膜在振动过程中的能量耗损小，有效提升压电扬声器的频响灵敏度，减弱压电扬声器低频失真效应，提高压电扬声器的音质，提高用户体验。
一种可能的实现方式中，第二凸起朝向振动膜的一端为尖状，或者第二凸起朝向振动膜的一端的端面为圆弧面。
一种可能的实现方式中，第二凸起和振动膜之间为面接触，第二凸起和振动膜接触的面沿边缘部的周缘延伸。通过将用于支撑振动膜的第二凸起与振动膜接触的面限定为平面，从而保证第二凸起和振动膜的接触面积足够大，保证第二凸起能够稳定支撑振动膜。可以理解的是，第二凸起与振动膜接触的端面宽度很窄，对振动膜的自由度有一定约束，但是不会对振动膜的边界的自由度约束过大。
一种可能的实现方式中，第一固定件包括连接的第一卡持部和第一连接部，第二固定件包括连接的第二卡持部和第二连接部，第一凸起形成于第一卡持部，第二凸起形成于第二卡持部，第一连接部和第二连接部固定，以将振动膜夹持于第一凸起和第二凸起之间。
一种可能的实现方式中，第一凸起的数量为一个，第一凸起设于第一卡持部；或者，第一凸起的数量为多个，多个第一凸起间隔设于第一卡持部。也就是说，振动膜的夹持部分不是所有部分均夹持于第一凸起和第二凸起之间，只是局部夹持于第一凸起和第二凸起之间，相比于图所示的振动膜的夹持部分整个夹持于第一凸起和第二凸起之间，本申请中对振动膜的自由度约束更小，从而在图所示的基础上有效降低振动膜在振动过程中的能量耗损，提升振动能量，有效提升压电扬声器的频响灵敏度，减弱压电扬声器低频失真效应，提高压电扬声器的音质，提高用户体验。
一种可能的实现方式中，振动组件还包括第一配重件，第一配重件固定于振源的中部。第一配重件可以通过自身的重量降低压电片中心区域的弯曲振动振幅，使能量传递至压电片边缘区域，提升压电片整体的振动振幅。也就是说，第一配重件能够达到抑制压电片中心区域和边缘区域振幅不均衡的目的，中心区域和边缘区域振动方向相反的情况也相应消失，使压电片更倾向于活塞振动，最终达到提升压电扬声器低频灵敏度的效果。
一种可能的实现方式中，振动组件还包括第二配重件，第二配重件固定于振动膜。通过将第二配重件固定于振动膜，为振动膜增加阻尼作用，改变振动膜的振动模态，改善共振，从而降低压电扬声器机械品质因数值的效果。该压电扬声器显著改善压电扬声器频响曲线中峰谷较多、失真大的问题，使频响曲线平坦。
一种可能的实现方式中，第二配重件靠近振源设置，从而压电扬声器的频响曲线平坦度更好。
一种可能的实现方式中，振动膜还包括连接部，连接部连接中部与边缘部之间；振源与中部相固定，第二配重件设于连接部，并靠近中部设置，连接部包括第一宽度，第二配重件位于1/4第一宽度～1/3第一宽度之间,以使压电扬声器的音效更佳。
一种可能的实现方式中，振动膜的中部镂空。通过将振动膜的中部设置为镂空结构，能够减少振动膜和振源的粘接区域，减少粘接对振源的震动的约束，从而减少振源的能量耗散，达到提升灵敏度的目的。
一种可能的实现方式中，压电扬声器还包括壳体，第一固定件背离第二固定件的一侧固定连接至壳体。
一种可能的实现方式中，第一固定件和壳体为一体成型结构。通过将第一固定件和壳体限定位一体成型结构，从而第一固定件和壳体可以通过嵌件成型等工艺形成。由于第一固定件和壳体组成的一个整体的结构，从而减少了第一固定件组装于壳体的步骤，提高产品生产效率。
第二方面，提供了一种电子设备。电子设备包括外壳和上述的压电扬声器，压电扬声器 设于外壳内侧。具有该压电扬声器的电子设备音质好。
第三方面，提供了一种电子设备。电子设备包括外壳和上述的压电扬声器，压电扬声器设于外壳内侧，压电扬声器和外壳形成腔体。也就是说，腔体由电子设备的部分结构和压电扬声器共同形成，有利于电子设备的薄型化。具有该压电扬声器的电子设备音质好。
一种可能的实现方式中，壳体包括中框，中框和压电扬声器形成腔体。也就是说，腔体由电子设备的部分结构和压电扬声器共同形成，有利于电子设备的薄型化。具有该压电扬声器的电子设备音质好。
一种可能的实现方式中，振动组件的第一固定件与外壳为一体成型结构，从而减少了第一固定件固定于外壳的步骤，提高产品生产效率。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1是本申请提供的电子设备在一些实施例中的结构示意图；
图2是本申请提供的压电扬声器在一些实施例中的结构示意图；
图3是图2所示的压电扬声器的分解结构示意图；
图4是图2所示压电扬声器沿A-A剖开的在一些实施例中的结构示意图；
图5是图3中的振动组件的分解结构示意图；
图6是图5所示结构中第二固定件在另一角度的结构示意图；
图7是本申请压电扬声器与传统压电扬声器的频响曲线的对比示意图；
图8是图4所示结构的部分结构局部放大示意图；
图9是图7所示结构的另一种实施方式的结构示意图；
图10是图7所示结构的另一种实施方式的结构示意图；
图11是图7所示结构的另一种实施方式的结构示意图；
图12是图7所示结构的另一种实施方式的结构示意图；
图13是图7所示结构的另一种实施方式的结构示意图；
图14是图7所示结构的另一种实施方式的结构示意图；
图15是图7所示结构的另一种实施方式的结构示意图；
图16是图7所示结构的另一种实施方式的结构示意图；
图17是图5所示结构中的振动膜等结构的另一角度的结构示意图；
图18是压电扬声器未设置第一配重件时的振幅示意图；
图19是压电扬声器设置第一配重件时的振幅示意图；
图20是第二配重件设于振动膜的不同位置对压电扬声器的谐振影响的曲线图；
图21是本申请中的压电扬声器与传统的压电扬声器的对比示意图；
图22是图2所示的压电扬声器的另一实施例的结构示意图；
图23是图22所示的压电扬声器的振动组件的分解结构示意图；
图24是图22所示结构在B-B方向的剖面结构示意图；
图25是图22所示结构在C-C方向的剖面结构示意图；
图26是图2所示的压电扬声器的另一实施例的结构示意图；
图27A是图26所示的压电扬声器在D-D方向的剖面结构示意图；
图27B是图27A所示结构的部分结构示意图；
图27C是图27B所示结构的另一种实施方式的结构示意图；
图27D是图27B所示结构的另一种实施方式的结构示意图；
图28是图2所示的压电扬声器的另一实施例的结构示意图；
图29是图28所示的压电扬声器的分解结构示意图；
图30是图2所示的压电扬声器的另一实施例的结构示意图；
图31是图30所示的压电扬声器的另一实施例的剖面结构示意图；
图32是图31所示的压电扬声器的部分结构的俯视结构示意图；
图33是本申请中的压电扬声器与传统的压电扬声器的对比图；
图34是图1所示的电子设备中的另一种实施例的结构示意图；
图35是图34所示结构的部分结构的分解结构示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。
在本申请实施例的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“连接”应做广义理解，例如，“连接”可以是可拆卸地连接，也可以是不可拆卸地连接；可以是直接连接，也可以通过中间媒介间接连接。本申请实施例中所提到的方位用语，例如，“左”、“右”、“内”、“外”等，仅是参考附图的方向，因此，使用的方位用语是为了更好、更清楚地说明及理解本申请实施例，而不是指示或暗指所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。“多个”是指至少两个。
可以理解的是，此处所描述的具体实施例用于解释相关方案，而非对该方案的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与方案相关的部分。
下面将参考附图并结合实施例来详细说明本申请。
请参阅图1，图1是本申请提供的电子设备1000在一些实施例中的结构示意图。
电子设备1000可以为手机、平板电脑、笔记本电脑、耳机、音响、车载设备、可穿戴设备、折叠终端设备、电视等具有扬声器的其他形态的电子设备。其中，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。图1所示实施例的电子设备1000以手机为例进行阐述。
电子设备1000可以包括外壳100、显示模组200、外放扬声器300(也称为喇叭)、非外放扬声器400(也称为听筒)、主板500、处理器600、存储器700以及电池800。
外壳100包括边框1001和后盖1002，边框1001连接后盖1002的边缘。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。
外壳100设有扬声孔。扬声孔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包括盖板和显示面板。盖板固定于外壳100，例如盖板固定于边框1001远离后盖1002的一侧。显示面板固定于盖板朝向后盖1002的内表面。盖板用于保护显示面板。盖板设有受话孔。示例性的，受话孔2001为贯穿盖板的通孔。显示面板在盖板上的投影与受话孔2001错开设置。
显示面板用于显示图像、视频等，显示面板还可以集成触摸功能。显示面板可以采用液晶显示屏(liquid crystal display，LCD)，有机发光二极管(organic light-emitting diode，OLED)，有源矩阵有机发光二极体或主动矩阵有机发光二极体(active-matrix organic light emitting  diode，AMOLED)，柔性发光二极管(flex light-emitting diode，FLED)，Miniled，MicroLed，Micro-oLed，量子点发光二极管(quantum dot light emitting diodes，QLED)等。
外放扬声器300及非外放扬声器400均位于边框1001内侧，且位于显示模组200与后盖1002之间。外放扬声器300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。非外放扬声器400发出的声音经受话孔2001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。外放扬声器300和/或非外放扬声器400可以采用后续实施例描述的压电扬声器。在本申请中，“A和/或B”包括“A”、“B”以及“A和B”三种情况。
主板500位于外壳100内侧，主板500上集成了处理器600、存储器700以及其他各类电路器件。显示面板、外放扬声器300及非外放扬声器400耦合处理器600。处理器600可以包括一个或多个处理单元，例如：处理器600可以包括应用处理器(application processor，AP)，调制解调处理器，图形处理器(graphics processing unit，GPU)，图像信号处理器(image signal processor，ISP)，控制器，视频编解码器，数字信号处理器(digital signal processor，DSP)，基带处理器，和/或神经网络处理器(neural-network processing unit，NPU)等。其中，不同的处理单元可以是独立的器件，也可以集成在一个或多个处理器中。
处理器600可以根据指令操作码和时序信号，产生操作控制信号，完成提取指令和执行指令的控制。
处理器600中还可以设置内部存储器，用于存储指令和数据。在一些实施例中，处理器600中的存储器可以为高速缓冲存储器。该存储器可以保存处理器600用过或使用频率较高的指令或数据。如果处理器600需要使用该指令或数据，可从该存储器中直接调用。避免了重复存取，减少了处理器600的等待时间，因而提高了系统的效率。
在一些实施例中，处理器600可以包括一个或多个接口。接口可以包括集成电路(inter-integrated circuit，I2C)接口，集成电路内置音频(inter-integrated circuit sound，I2S)接口，脉冲编码调制(pulse code modulation，PCM)接口，通用异步收发传输器(universal asynchronous receiver/transmitter，UART)接口，移动产业处理器接口(mobile industry processor interface，MIPI)，通用输入输出(general-purpose input/output，GPIO)接口，用户标识模块(subscriber identity module，SIM)接口，和/或通用串行总线(universal serial bus，USB)接口等。处理器600可以通过以上至少一种接口连接触摸传感器、无线通信模块、显示器、摄像头等模块。
存储器700可以用于存储计算机可执行程序代码，该可执行程序代码包括指令。存储器700可以包括存储程序区和存储数据区。其中，存储程序区可存储操作系统，至少一个功能所需的应用程序(比如拍照功能，录像功能等)等。存储数据区可存储电子设备1000使用过程中所创建的数据(比如图像数据，视频数据等)等。此外，存储器700可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件，闪存器件，通用闪存存储器(universal flash storage，UFS)等。
处理器600通过运行存储在存储器700的指令，和/或存储在设置于处理器600中的存储器的指令，执行电子设备1000的各种功能方法或数据处理，例如，使外放扬声器300发出声音，使非外放扬声器400采集声音等。电池800用于为电子设备1000供电。
主板500上还可以集成用于处理音频信号的音频模块30，音频模块30可以包括音频信号发射芯片31和功率放大器32。
音频信号发射芯片31用于发射音频信号。音频信号发射芯片31为一独立的芯片。可以理解的是，通过设置一独立的芯片来独立运行发射音频信号的功能，从而提高音频信号的传 输效率。
当然，在其他实施方式中，发射音频信号的功能也可以集成在中央处理器(central processing unit，CPU)上。此时，因为CPU具有发射音频信号的功能，所以电子设备1000的内部可以节省一个芯片的占用空间，从而提高电子设备1000的内部空间的利用率。此外，发射音频信号的功能也可以集成在其他芯片上，例如电池800管理芯片。
此外，功率放大器32的一端电连接于音频信号发射芯片31，另一端电连接于外放扬声器300。当音频信号发射芯片31发射音频信号时，音频信号传输至功率放大器32，功率放大器32对音频信号进行处理，并将处理后的音频信号传输至外放扬声器300。外放扬声器300根据音频信号向电子设备1000的外部发出声音。
电子设备1000还可以包括天线模组、移动通信模组、传感器模组、马达、摄像模组等功能模组中的一者或多者。功能模组耦合处理器600。天线模组用于发射和接收电磁波信号，天线模组可以包括多个天线，每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。移动通信模组可以提供应用在电子设备1000上的包括2G/3G/4G/5G等无线通信的解决方案。
传感器模组可以包括压力传感器、陀螺仪传感器、气压传感器、磁传感器、加速度传感器、距离传感器、接近光传感器、指纹传感器、温度传感器、触摸传感器或环境光传感器的一者或多者。马达可以产生振动提示。马达可以用于来电振动提示，也可以用于触摸振动反馈。摄像模组用于采集模板图像等等。
请一并参阅图2和图3，图2是本申请提供的压电扬声器10在一些实施例中的结构示意图。图3是图2所示的压电扬声器10的分解结构示意图。
压电扬声器10包括壳体11及振动组件12，振动组件12安装于壳体11的开口110处，并与壳体11共同围设形成腔体，也就是说，振动组件12密封壳体11的开口110。本实施例中，振动组件12与主板500上的功率放大器32电连接，振动组件12根据功率放大器32发送的音频信号发生振动。
壳体11大致呈方形柱体。壳体11可以包括顶面111和形成于顶面111的开口110，开口110连通壳体11的内部，振动组件12连接于壳体11的顶面111，并覆盖开口110，即壳体11和振动组件12共同围设形成腔体A(图4)。本实施例中，腔体A为密封腔体。压电扬声器10的发声方向为振动组件12背向壳体11的方向，通过将背向发声方向的腔体A密封，以避免压电扬声器10发出的声音进入腔体A中产生损耗，影响压电扬声器10的发声质量。
当然，在其他实施例的一种实施场景中，壳体11还可以呈圆柱体、长方形柱体或者异形体。在其他实施例的另一种实施场景中，腔体A还可以是开放式腔体。
请参阅图3和图4，图4是图2所示压电扬声器10沿A-A剖开的在一些实施例中的结构示意图。
壳体11还包括定位槽112和固定孔113。定位槽112设于顶面111，围绕开口110设置并与腔体A连通。振动组件12包括定位凸起120，定位凸起120限位于定位槽112内，以使振动组件12准确且稳定的安装于壳体11。固定孔113的数量为四个，四个固定孔113分别设于顶面111的四个角落，四个固定孔113位于定位槽112的外围。振动组件12通过螺钉与固定孔113配合连接的方式，以使振动组件12固定于顶面111。
当然，在其他实施例的一种实施场景中，固定孔113的数量还可以为一个或多个，多个固定孔可以围绕定位槽的外周间隔设置。
在其他实施例的又一种实施场景中，壳体11还可以不包括固定孔，振动组件12还可以 通过粘接、卡接等其他连接方式固定于壳体11，本申请不对振动组件12和壳体11之间的固定方式作限定。
在其他实施例中的另一种实施场景中，壳体11还可以不包括定位槽，或者，壳体11还可以不包括定位槽和固定孔。
请参阅图4和图5，图5是图3中的振动组件12的分解结构示意图。
振动组件12包括固定件121、振动膜122以及振源123。固定件121为中间镂空的框架，振动膜122的边缘部固定于固定件121，振动膜122除边缘的部分位于镂空处，即振动膜122的中间部分位于镂空处，以用于振动。固定件121固定于壳体11，以将振动组件12固定于壳体11。振源123与振动膜122相固定。示例的，振源123固定于振动膜122朝向腔体A的一侧。本实施例中，振源123电连接至主板500上的功率放大器32。振源123用于发生振动，以带动振动膜123振动。具体的，振源123可以根据功率放大器32发送的音频信号发生振动，以带动振动膜122振动产生声音。当然，在其他实施例中，振源123也可以固定于振动膜122背向腔体A的一侧。
固定件121包括相对设置的第一固定件1211和第二固定件1212。第二固定件1212固定连接第一固定件1211。示例的，第一固定件1211包括连接的第一卡持部2111和第一连接部2112，第二固定件1212包括连接的第二卡持部2121和第二连接部2122。第一卡持部2111和第二卡持部2121相对设置，振动膜122夹持在第一卡持部2111和第二卡持部2121之间，第一连接部2112和第二连接部2122固定，以将振动膜122夹持于第一卡持部2111和第二卡持部2121之间。
当然，在其他实施例中，第一固定件1211还可以不具有第一连接部，第二固定件1212也可以不具有第二连接部，第一卡持部2111和第二卡持部2121不用于卡持振动膜122的部分可以通过粘接、卡接或者螺接等连接方式固定。
第一固定件1211固定于壳体11的开口110处，从而第二固定件1212位于第一固定件1211背向壳体11的一侧。具体的，第一固定件1211的第一卡持部2111背向第二卡持部2121的表面设于壳体11的顶面111，以使固定于固定件121的振动膜122覆盖开口110。定位凸起120形成于第一卡持部2111背向第二卡持部2121的表面，定位凸起120收容于定位槽112，以将实现振动组件12的限位。
本实施例中，第一卡持部2111和第二卡持部2121大致为方形板体，第一卡持部2111和第二卡持部2121两者的中部均镂空。第一连接部2112的数量为四个，四个第一连接部2112分别连接于第一卡持部2111的四边，且两两相对设置。第二连接部2122的数量也为四个，四个第二连接部2122分别连接于第二卡持部2121的四边，且两两相对设置。四个第一连接部2112和四个第二连接部2122一一对应连接。
可以理解的是，第一连接部2112和第二连接部2122的数量均为四个，且分别两两相对设置，保证了固定件121四边受力平衡。
第一连接部2112和第二连接部2122可以通过螺接固定。示例的，第一连接部2112包括螺纹孔，第二连接部2122包括通孔，螺钉穿过通孔固定至第一连接部2112的螺纹孔。当然，在其他实施例中，第一连接部2112和第二连接部2122还可以通过卡接，粘接等其他连接方式固定。
请参阅图4、图5和图6，图6是图5所示结构中第二固定件1212在另一角度的结构示意图。其中，图6中的第二固定件1212由图5中的第二固定件1212横向翻转得到。
第一固定件1211包括第一凸起2113，第一凸起2113形成于第一卡持部2111背向定位凸 起120的一侧。第二固定件1212包括第二凸起2123，第二凸起2123形成于第二卡持部2121朝向第一卡持部2111的一侧。第一凸起2113和第二凸起2123相对设置，振动膜122包括中部1221和边缘部1223，中部1221位于边缘部1223的内侧，边缘部1223包括夹持部分和非夹持部分，夹持部分夹持于第一凸起2113和第二凸起2123之间，非夹持部分位于夹持部分背离中部1221的一侧，第一凸起2113和第二凸起2123共同形成简支支撑结构，以支撑振动膜122。
本申请中的振动膜122的边缘部1223的夹持部分夹持于第一凸起2113和第二凸起2123之间，非夹持部分位于夹持部分背离中部1221的一侧，也就是说，边缘部1223的边缘未被第一凸起2113和第二凸起2123夹持。第一凸起2113和第二凸起2123共同形成简支支撑结构，以支撑振动膜122，第一凸起2113和第二凸起2123仅约束振动膜122在垂直方向的位移，振动膜122的边缘部可在垂直方向具有一定自由度的转动，振动膜122的边缘部的自由度释放。
可以理解的是，振动膜122的自由度约束越多，能量消耗越快。相比于将振动膜的边缘固定至壳体上，振动膜的边缘自由度被完全约束的方案，本申请的振动膜122的边界的自由度没有被完全约束，从而有效降低振动膜122在振动过程中的能量耗损，提升振动能量，有效提升压电扬声器10的频响灵敏度，减弱压电扬声器10低频失真效应，提高压电扬声器10的音质，提高用户体验。
请参阅图7，图7是本申请压电扬声器10与传统压电扬声器的频响曲线的对比示意图。
其中，图7中标号为L1的曲线为本申请的压电扬声器10(通过简支支撑结构支撑振动膜122)的频响曲线，标号为L2的曲线为传统压电扬声器(将振动膜固定至壳体)的频响曲线。通过图7可知，由于本申请压电扬声器10通过简支支撑结构支撑振动膜122，以使振动膜122的能量消耗较低，相较于传统压电扬声器，低频和高频灵敏度有明显提升。
请参阅图5，第一卡持部2111包括相背设置的第一表面21和第二表面22，以及贯穿第一卡持部2111的第一通孔23。定位凸起120形成于第二表面22，第一表面21设有围绕镂空处设置的凹槽24，凹槽24与镂空连通。第一凸起2113形成于凹槽24的底壁且围绕镂空设置。也可以理解为，第一凸起2113的两侧设有避让空间，以使第一卡持部2111夹持振动膜122的夹持部分时，仅第一凸起2113的端部与振动膜122接触，避免其他部分振动膜122接触，影响振动膜122的转动自由度。
本实施例中，第一凸起2113的数量为一个，一个第一凸起2113设于第一卡持部2111，并环绕第一卡持部2111的镂空部。也就是说，第一凸起2113连续的环绕振动膜122的周缘。
第一通孔23贯穿第一表面21和第二表面22。本实施例中的第一通孔23的数量为四个，四个第一通孔23分别位于第一卡持部2111的四角。四个第一通孔23分别与壳体11的四个固定孔113一一对应。当然，在其他实施例中，第一卡持部2111还可以不设置第一通孔。
请参阅图6，第二卡持部2121包括夹持面25和第二通孔26。夹持面25设有围绕镂空处设置的凹槽27，凹槽27与镂空连通。第二凸起2123形成于凹槽27的底壁且围绕镂空设置。也可以理解为，第二凸起2123的两侧设有避让空间，以使第二卡持部2121夹持振动膜122的夹持部分时，仅第二凸起2123的端部与振动膜122接触，避免其他部分振动膜122接触，影响振动膜122的转动自由度。
本实施例中，第二凸起2123的数量为一个，一个第二凸起2123设于第二卡持部2121，并环绕第二卡持部2121的镂空部。也就是说，第二凸起2123连续的环绕振动膜122的周缘。
第二通孔26贯穿夹持面25和与夹持面25向背的表面。本实施例中的第二通孔26的数 量为四个，四个第二通孔26分别位于第二卡持部2121的四角。四个第二通孔26与四个第一通孔23一一对应设置。螺钉依次贯穿第二通孔26、第一通孔23固定至壳体11的固定孔113内，以将的固定件121固定于壳体11。
当然，在其他实施例中，第二卡持部2121也可以不设置第二通孔，固定件121还可以通过粘接、卡接等其他连接方式固定至壳体11。
本实施例中，第一凸起2113和第二凸起2123的形状均可以有多种，不同形状的第一凸起2113和第二凸起2123有多种配合方式。下文将结合相关附图具体介绍第一凸起2113和第二凸起2123的几种配合方式。
请参阅图8，图8是图4所示结构的部分结构局部放大示意图。
本实施例中，第一凸起2113和振动膜122之间为面接触，第一凸起2113与振动膜122接触的面沿振动膜122边缘部的周缘延伸。第二凸起2123和振动膜122之间为线接触，第二凸起2123与振动膜122接触的线沿振动膜122边缘部的周缘延伸。示例的，第一凸起2113朝向振动膜122的一端的端面为平面，也就是说，第一凸起2113与振动膜122的边缘部接触表面为平面，平面的宽度大于等于0.3mm且小于3mm。振动膜122与第一凸起2113接触的面为平面，以实现第一凸起2113和振动膜122之间的面接触。
第二凸起2123朝向振动膜122的一端的端面为圆弧面，第二凸起2123与振动膜122接触的部分为圆弧面最突出的部分，圆弧面最突出的部分形成一条线。振动膜122与第二凸起2123接触的面为平面，振动膜122与第二凸起2123接触，以实现第二凸起2123与振动膜122之间的线接触。可以理解的是，圆弧面最突出的部分形成的一条线的宽度非常窄。
可以理解的是，第一凸起2113和第二凸起2123与振动膜122接触的面积越小，对振动膜122的边界的自由度约束越小，振动膜122在振动过程中的能量耗损越小。但是也同时需要考虑振动膜122能够稳定夹持于第一凸起2113和第二凸起2123中。
本申请通过将用于支撑振动膜122的第一凸起2113与振动膜122接触的面限定为平面，从而保证第一凸起2113和振动膜122的接触面积足够大，保证第一凸起2113能够稳定支撑振动膜122。可以理解的是，第一凸起2113与振动膜122接触的端面宽度很窄，端面宽度大于等于0.3mm且小于3mm，从而保证端面宽度大于组装同心度公差，便于实现第一凸起2113与振动膜122的组装，还保证第一凸起2113不会对振动膜122的边界的自由度约束过大。
同时，将用于与第一凸起2113配合夹持振动膜122的第二凸起2123与振动膜122接触的端面设计成圆弧面，能实现与第一凸起2113配合夹持振动膜122，且第二凸起2123与振动膜122接触的面积小，对振动膜122的边界的自由度约束小，振动膜122在振动过程中的能量耗损小，有效提升压电扬声器10的频响灵敏度，减弱压电扬声器10低频失真效应，提高压电扬声器10的音质，提高用户体验。
请参阅图9，图9是图7所示结构的另一种实施方式的结构示意图。
在一些实施方式中，第一凸起2113和振动膜122接触的端面为平面，平面的宽度大于等于0.3mm且小于3mm。第二凸起2123朝向振动膜122的一端为尖状，也就是说，第二凸起2123与振动膜122接触的一端为尖状，第二凸起2123与振动膜122接触的部分第二凸起2123尖状最凸出的部分，尖状最凸出的部分形成一条线。振动膜122与第二凸起2123接触的面为平面，从而第二凸起2123与振动膜122之间为线接触，第二凸起2123与振动膜122接触的线沿振动膜122边缘部的周缘延伸。第二凸起2123与振动膜122之间为线接触，第二凸起2123对振动膜122的边界的自由度约束小，振动膜122在振动过程中的能量耗损小，有效提升压电扬声器10的频响灵敏度，减弱压电扬声器10低频失真效应，提高压电扬声器10的音 质，提高用户体验。第二凸起2123与振动膜122接触的一端为尖状，相比于与振动膜122接触的端面为圆弧面，尖状的第二凸起2123更不方便组装。
可以理解的是，两个面逐渐靠近至接触的端部为尖状。
请参阅图10，图10是图7所示结构的另一种实施方式的结构示意图。
在一些实施方式中，第一凸起2113和振动膜122接触的端面为平面，平面的宽度大于等于0.3mm且小于3mm。第二凸起2123和振动膜122之间为面接触，也就是说，第二凸起2123朝向振动膜122的一端的端面为平面。同样的，第二凸起2123与振动膜122接触的平面的宽度较窄，对振动膜122的自由度有一定约束，但是不会对振动膜122的边界的自由度约束过大。也就是说，本实施例中的第一凸起2113和第二凸起2123均与振动膜122为面接触，从而振动膜122与第一凸起2113和第二凸起2123接触面积都较大，振动膜122能够更加稳固的夹持于第一凸起2113和第二凸起2123之间。
同时，第一凸起2113和第二凸起2123对振动膜122的边界的自由度约束较小，振动膜122在振动过程中的能量耗损较小，有效提升压电扬声器10的频响灵敏度，减弱压电扬声器10低频失真效应，提高压电扬声器10的音质，提高用户体验。
请参阅图11、图12和图13，图11是图7所示结构的另一种实施方式的结构示意图。图12是图7所示结构的另一种实施方式的结构示意图。图13是图7所示结构的另一种实施方式的结构示意图。
在一些实施方式中，如图11，第一凸起2113和振动膜122之间为线接触，第二凸起2123和振动膜122之间为面接触。示例的，第一凸起2113与振动膜122接触的表面为圆弧面，第二凸起2123和振动膜122接触的表面为平面，平面的宽度大于等于0.3mm且小于3mm。
在一些实施方式中，如图12，第一凸起2113和振动膜122之间为线接触，第二凸起2123和振动膜122之间为线接触。示例的，第一凸起2113与振动膜122接触的表面为圆弧面，第二凸起2123和振动膜122接触的表面为圆弧面。
在该实施方式中，第一凸起2113和第二凸起2123与振动膜122之间均为线接触，第一凸起2113和第二凸起2123与振动膜122接触的位置不容易对准，相对于第一凸起2113和第二凸起2123至少一个与振动膜122之间面接触的方案，稳定性较差。但是，由于第一凸起2113和第二凸起2123与振动膜122之间均为线接触，本实施方式中的第一凸起2113和第二凸起2123对振动膜122的边界的自由度约束更小，振动膜122在振动过程中的能量耗损更小，有效提升压电扬声器10的频响灵敏度，减弱压电扬声器10低频失真效应，提高压电扬声器10的音质，提高用户体验。
当然，在其他实施例中，第一卡持部2111和第二卡持部2121还可以设置定位结构，以保证第一凸起2113和第二凸起2123与振动膜122接触的位置对准。
在一些实施方式中，如图13，第一凸起2113和振动膜122之间为线接触，第二凸起2123和振动膜122之间为线接触。示例的，第一凸起2113与振动膜122接触的表面为圆弧面，第二凸起2123和振动膜122接触的一端为尖状。第一卡持部2111和第二卡持部2121还可以设置定位结构，以保证第一凸起2113和第二凸起2123与振动膜122接触的位置对准。
请参阅图14、图15和图16，图14是图7所示结构的另一种实施方式的结构示意图。图15是图7所示结构的另一种实施方式的结构示意图。图16是图7所示结构的另一种实施方式的结构示意图。
在一些实施方式中，如图14，第一凸起2113和振动膜122之间为线接触，第二凸起2123和振动膜122之间为面接触。示例的，第一凸起2113与振动膜122接触的一端为尖状，第二 凸起2123和振动膜122接触的表面为平面，平面的宽度大于等于0.3mm且小于3mm。
在一些实施方式中，如图15，第一凸起2113和振动膜122之间为线接触，第二凸起2123和振动膜122之间为线接触。示例的，第一凸起2113与振动膜122接触的一端为尖状，第二凸起2123和振动膜122接触的表面为圆弧面。
在一些实施方式中，如图16，第一凸起2113和振动膜122之间为线接触，第二凸起2123和振动膜122之间为线接触。示例的，第一凸起2113与振动膜122接触的一端为尖状，第二凸起2123和振动膜122接触的一端为尖状。
在一些实施方式中，第一凸起2113和第二凸起2123采用弹性材料制成，从而第一凸起2113和第二凸起2123在夹持振动膜122的过程中不会因为硬度较大对振动膜122产生损坏。
请参阅图4、图5和图17，图17是图5所示结构中的振动膜122等结构的另一角度的结构示意图。其中，图17中的振动等结构为图5中振动膜122等结构横向翻转得到。
振动膜122大致为矩形纯铝金属膜片，振动膜一方面用于振动发声，另一方面还可以与壳体11密封，避免振动膜122两侧的声音发声短路。振动膜122还包括连接部1222，振动膜122的连接部1222连接在振动膜122的中部1221与振动膜122的边缘部1223之间。振源123固定于振动膜122的中部1221。
当然，在其他实施例中，振动膜122可以为非金属膜片，还可以为金属膜片和非金属膜片粘接而成的双层膜片，也可以为金属、非金属复合膜片。
本实施例中，振源123可以通过振动传递粘接层124(图4)固定于振动膜122的中部1221。振源123将振动通过振动传递粘接层124传递给振动膜122。也就是说，振动传递粘接层124既能将振源123固定于振动膜122，还能将振动传递给振动膜122。
示例的，振动传递粘接层124可以为胶层、聚对苯二甲酸乙二醇酯、胶层的三明治结构背胶。当然，也可采用胶水，将振源123的振动传递给振动膜122。
请结合图16和图17，振动膜122的边缘部1223的非夹持部分伸出第一凸起2113和第二凸起2123远离振动膜122的中部1221(图5)的一侧。可以理解的是，第一凸起2113和第二凸起2123仅限制了振动膜122在垂直方向的位移，没有限制振动膜122在水平方向的位移，所以当振动膜122在振动过程中，会拉动振动膜122的边缘部1223朝向中部1221运动。本实施例通过限制振动膜122的非夹持部分伸出第一凸起2113和第二凸起2123远离振动膜122的中部1221的一侧，从而就算振动膜122在振动过程中边缘部1223会朝向中部1221运动，也不至于脱离第一凸起2113和第二凸起2123的夹持。
本实施例中，如图4、图5和图17，振源123为压电片。下文中压电片和振源123标号相同。压电片123通过振动传递粘接层124固定于振动膜122中部1221，并位于振动膜122朝向壳体11的一侧。也就是说，压电片123位于腔体A内。压电片123采用单晶或双晶的压电陶瓷制成，压电片123的层数、叠层厚度及外形尺寸均可以根据实际需要设定。分别为正极和负极的线路电连接在压电片123和功率放大器32之间，以使功率放大器32与压电片123导通，压电片123根据功率放大器32传输的信号进行振动。
示例的，请结合图5和图17，第一固定件1211的定位凸起120上设有两个电线通孔B，以供电连接压电片123的两条线路通过电线通孔B伸出腔体A与功率放大器32电连接。当然，在其他实施例中，电线通孔B的数量不限于两个，还可以是一个或两个以上。或者压电片123还可以通过除线路以外的电连接结构连接功率放大器32，例如柔性电路板等。
当然，在其他实施例中，振源123还可以是磁致伸缩件或电激励器等振源。
在一些实施方式中，如图4、图5和图17，振动组件12还包括第一配重件125，第一配 重件125固定于振源123的中部1221。具体的，第一配重件125固定于压电片123的中部1221。第一配重件125可以为金属配重件、非金属配重件或金属和非金属复合件。示例的，金属配重件的材料可以是钢、铜、钨、铝等纯金属及其合金材料，非金属配重件的材料可以是塑料、聚甲基丙烯酰亚胺泡沫、胶水等非金属材料。第一配重件125可以通过胶水(紫外光固化胶或热熔胶或双组分胶水)与压电片123粘接固定。第一配重件125的形状可以是立方体、圆柱体圆锥体及异形体等形状。第一配重件125也可以是截面为矩形、梯形、三角形等轴对称形状的环状结构。
本实施方式中，第一配重件125的数量为一个，设于压电片123的中部1221，从而在压电片123弯曲振动时，第一配重件125可以通过自身的重量降低压电片123中心区域的弯曲振动振幅，使能量传递至压电片123边缘区域，提升压电片123整体的振动振幅。也就是说，第一配重件125能够达到抑制压电片123中心区域和边缘区域振幅不均衡的目的，中心区域和边缘区域振动方向相反的情况也相应消失，使压电片123更倾向于活塞振动，最终达到提升压电扬声器10低频灵敏度的效果。
当然，第一配重件125的数量还可以为多个，多个第一配重件125呈对称粘贴于压电片123对应的区域。
可以理解的是，不同类型的压电扬声器10的第一配重件125的重量可以不同。具体的，第一配重件125的重量可以根据压电扬声器10的谐振频率要求设置。
请参阅图18和图19，图18是压电扬声器10未设置第一配重件125时的振幅示意图。图19是压电扬声器10设置第一配重件125时的振幅示意图。
其中，图18左侧为压电扬声器10未设置第一配重件125时的3D振幅示意图，图18右侧为压电扬声器10未设置第一配重件125时的2D振幅示意图。图19左侧为压电扬声器10设置第一配重件125时的3D振幅示意图，图19右侧为压电扬声器10设置第一配重件125时的2D振幅示意图。图18右侧标号为L3的线为标准线，标号为L4的线为压电片振动时的曲线。图19右侧标号为L5的线为标准线，标号为L6的线为压电片123振动时的曲线。
如图18，压电片123在振动时呈现拱形弯曲振动，即压电片123的中心区域振幅大，边缘区域振幅低。如图19，压电片123中心区域增加第一配重件125使中心区域振动质量增加，抑制中心区域振幅，提升边缘区域振幅，也可以改善中心区域和边缘区域振动方向不同的现象，从而抑制压电片123的弯曲振动造成的不同区域振幅不均衡的现象，压电片123由弯曲振动优化向近似的活塞运动，提升了有效振动面积，所以低频灵敏度提升，扬声器谐振频率前移。
在一些实施方式中，如图4、图5和图17，振动组件12还包括第二配重件126，第二配重件126固定于振动膜122。本实施例中第二配重件126可以固定于振动膜122朝向振源123的一侧，当然，第二配重件126也可以设于振动膜122背向振源123的一侧。第二配重件126可以通过胶水粘接、背胶(双面胶)粘接、焊接、铆接等方式固定于振动膜122，也可以是与振动膜122为一体成型结构。
具体的，第二配重件126的数量为四个，四个第二配重件126围绕振源123设置，并靠近振源123设置。当然，在其他实施例中，第二配重件126还可以为除四个以外的其他数量。或者第二配重件126还可以为一个圆环，靠近或环绕振源123设置。
可以理解的是，当振动膜122上未设有第二配重件126时，压电扬声器10的频响曲线中峰谷较多，失真大。本申请通过将第二配重件126固定于振动膜122，为振动膜122增加阻尼作用，改变振动膜122的振动模态，改善共振，从而降低压电扬声器10机械品质因数值的 效果。该压电扬声器10显著改善压电扬声器10频响曲线中峰谷较多、失真大的问题，使频响曲线平坦。
可以理解的是，不同类型的压电扬声器10，第二配重件126设置于振动膜122的位置也可以不同，以使压电扬声器10的音效更佳。示例的，如图20，图20是第二配重件126设于振动膜122的不同位置对压电扬声器10的谐振影响的曲线图。从图20可知，随着振动膜122上的第二配重件126距振源123距离的增加，压电扬声器10的谐振频率增加，因此可以根据需要的谐振频率设置第二配重件126距振源123距离。
可以理解的是，不同类型的压电扬声器10的第二配重件126的重量可以不同。具体的，第二配重件126的重量可以根据压电扬声器10的谐振频率要求设置。
本实施例中，第二配重件126设于振动膜122的连接部1222，第二配重件126靠近振动膜122的中部1222设置，连接部1222包括第一宽度W，第二配重件126位于1/4第一宽度W～1/3第一宽度W(图4)之间。通过限定第二配重件126靠近振动膜122的中部1222设置，且位于1/4第一宽度W～1/3第一宽度W之间，以使压电扬声器10的音效更佳。
本实施例中，第二配重件126的材料可以是丁基不老胶、阻尼胶、光敏树脂、金属等等。第二配重件126的材料也可以和第一配重件125的材料相同。第二配重件126的形状可以是立方体、圆柱体圆锥体及异形体等形状。第二配重件126也可以是截面为矩形、梯形、三角形等轴对称形状的环状结构。第二配重件126可以通过胶水与振动膜122粘接，胶水例如可以是紫外光固化胶、热熔胶或双组分胶水。当然，第二配重件126也可以通过背胶、焊接等连接方式固定于振动膜122。
在一些实施方式中，振动组件12还可以包括第一配重件125和第二配重件126中的一者。
请参阅图21，图21是本申请中的压电扬声器10与传统的压电扬声器10的对比示意图。
如图21，本申请的压电扬声器10(包括第一配重件125和第二配重件126，通过简支支撑结构支撑振动膜122)和传统压电扬声器10(不包括第一配重件和第二配重件，振动膜直接固定于壳体)在同等测试条件下(交流电压、消音室自由场环境和100Hz～20kHz扫频信号等均相同)测试。
其中，如图21，L7、L8分别为本申请压电扬声器10和传统扬声器的频响曲线，L9、L10分别为本申请压电扬声器10和传统扬声器的失真曲线。我们设定压电扬声器10的低频特性评估频点为200Hz，本实施案例的压电扬声器10方案低频提升6.5dB～12.2dB，低频灵敏度越高，代表本申请压电扬声器10低频表现力越强，听感越佳。
通过图21中曲线L7和曲线L8可知，本申请的压电扬声器10的频响曲线相比于传统压电扬声器10的频响曲线，中高频峰谷改善非常显著，频响曲线平坦度，接近常规动圈式扬声器，以远薄于动圈式扬声器的厚度，达到了同辐射面积尺寸的常规动圈式扬声器的声学特性。通过图21中曲线L9和曲线L10可知，本申请的压电扬声器10对频响曲线的高频和低频总谐波失真起到显著的优化作用，高频总谐波失真由30％降至8.4％以下，低频总谐波失真由95％降至48％以下。本申请通过简支支撑结构支撑振动膜122，减少对振动膜122的自由度的束缚，同时还通过配重件与振动膜122和振源123配合，对压电扬声器10的固有特性进行了优化，降低了压电扬声器10低频和高频振动噪声和失真，使其具备媲美甚至优于常规动圈扬声器的听感体验。
请参阅图22、图23和图24，图22是图2所示的压电扬声器10的另一实施例的结构示意图。图23是图22所示的压电扬声器10的振动组件12的分解结构示意图。图24是图22所示结构在B-B方向的剖面结构示意图。
本实施例中的压电扬声器10与图2所示的压电扬声器10的结构大致相同，相同的部分不再赘述。不同的是，本实施例中的振动组件12的固定件121的结构稍有不同。具体的，本实施例中的第一凸起2113的数量为四个，四个第一凸起2113间隔设置于第一卡持部2111，并围绕第一卡持部2111的镂空部。第二凸起2123的数量也为四个，四个第二凸起2123间隔设置于第二卡持部2121，并围绕第二卡持部2121的镂空部。四个第一凸起2113和四个第二凸起2123一一对应设置，以配合夹持振动膜122的边缘部1223。也就是说，振动膜122的边缘部1223的局部夹持于第一凸起2113和第二凸起2123之间，即，第一凸起2113和第二凸起2123非连续的环绕振动膜122的边缘部1223。
当然，在其他实施例中，第一凸起2113和第二凸起2123的数量还可以是除四个以外的其他数量。
请参阅图24和图25，图25是图22所示结构在C-C方向的剖面结构示意图。
可以理解的是，振动膜122的边缘部1223的部分夹持于第一凸起2113和第二凸起2123之间(如图24)，振动膜122的边缘部1223的部分并没有被第一凸起2113和第二凸起2123夹持，而是处于悬空状态(如图25)。
也就是说，振动膜122的边缘部1223不是所有部分均夹持于第一凸起2113和第二凸起2123之间，只是局部夹持于第一凸起2113和第二凸起2123之间，相比于图2所示的振动膜122的边缘部1223整个夹持于第一凸起2113和第二凸起2123之间，本申请中对振动膜122的自由度约束更小，从而在图2所示的基础上有效降低振动膜122在振动过程中的能量耗损，提升振动能量，有效提升压电扬声器10的频响灵敏度，减弱压电扬声器10低频失真效应，提高压电扬声器10的音质，提高用户体验。
本实施例中，四个第一凸起2113和四个凸起分别夹持振动膜122的边缘部1223的四角，从而能够更加稳固的支持限位振动膜122。当然，在其他实施例中，第一凸起2113和第二凸起2123不限于仅夹持振动膜122的四角，或者还可以夹持振动膜122的边缘部1223的其他地方。
请参阅图26和图27A，图26是图2所示的压电扬声器10的另一实施例的结构示意图。图27A是图26所示的压电扬声器10在D-D方向的剖面结构示意图。
本实施例中的压电扬声器10与图2所示的压电扬声器10的结构大致相同，相同的部分不再赘述。不同的是，本实施例中振动组件12还包括弹性连接件127，弹性连接件127一端连接固定件121，另一端连接振动膜122。具体的，本实施例中的弹性连接件127可以一端连接第一固定件1211，另一端连接振动膜122，也可以一端连接第二固定件1212，另一端连接振动膜122。当然，第一固定件1211与振动膜122之间，第二固定件1212与振动膜122之间还可以均通过弹性连接件127连接。
可以理解的是，简支支撑结构支撑振动膜122，相对于相关技术中将振动膜固定于壳体的方案，由于简支支撑结构对振动膜122的自由度未完全约束，压电扬声器10会存在纯音不良的问题，可听见振动膜122拍打第一凸起2113和第二凸起2123产生的杂音。
鉴于此，本申请通过设置弹性连接件127连接振动膜122和固定件121(第一固定件1211和/或第二固定件1212)，以连接振动膜122和固定件121。由于弹性连接件127具有一定弹性，连接振动膜122和固定件121，既能保证振动膜122的自由度不被弹性连接件127约束，不会改变压电扬声器10的频响曲线，还能避免振动膜122拍打第一凸起2113和第二凸起2123，避免了杂音的产生，避免了杂音的产生，起到改善全频纯音的作用。
请参阅图27A和图27B，图27B是图27A所示结构的部分结构示意图。
本实施例中，弹性连接件127一端连接第一固定件1211的第一凸起2113，另一端连接振动膜122。具体的，弹性连接件127一端连接第一凸起2113未与振动膜122接触的部分。示例的，第一凸起2113包括两个相背设置的第一侧面81和第二侧面82，第一侧面81靠近中部1221，第二侧面82背离中部1221，第一侧面81和第二侧面82与振动膜122不接触。弹性连接件127一端连接第一侧面81，另一端连接振动膜122。
示例的，第一侧面81形成凹槽，弹性连接件127一端连接于凹槽的槽壁，另一端连接振动膜122。由于第一侧面81形成凹槽，弹性连接件127部分收容于凹槽，凹槽对弹性连接件127有一定限位作用，使得弹性连接件127稳定的连接于第一侧面81。凹槽可以通过将第一侧面81设计成凹曲面形成，也可以在第一侧面82上形成凹槽，还可以通过在第一固定件靠近第一侧面81处形成凹槽。当然，第一侧面81还可以为凸曲面、平面或者凹凸不同的面。
当然，在其他实施例中，如图27C，弹性连接件127一端还可以连接第二侧面82，另一端连接振动膜122。第二侧面82可以形成凹槽，或者第二侧面82可以为凹曲面、凸曲面、平面或凹凸不平的面中的一种。或者，如图27D，第一侧面81和第二侧面82还可以分别通过弹性连接件127与振动膜122连接。第一侧面81和第二侧面82分别可以形成凹槽，或者第一侧面81和第二侧面82分别可以为凹曲面、凸曲面、平面或凹凸不平的面中的一种。
当然，在其他实施例中，弹性连接件还可以一端连接第二固定件的第二凸起，另一端连接振动膜。弹性连接件连接第二凸起未与振动膜接触的部分。示例的，第二凸起也包括两个相背设置的侧面，弹性连接件可以一端连接第二凸起其中一个侧面，另一端连接振动膜。或者第二凸起的两个侧面均分别通过弹性连接件与振动膜连接。
在其他实施例中，弹性连接件还可以连接在第一固定件的第一凸起和振动膜之间。或者弹性连接件还可以连接在第二固定件的第二凸起和振动膜之间。
本实施例中，弹性连接件127为环状的阻尼胶，振动膜122的边缘部1223的周缘均通过阻尼胶127连接至固定件121。阻尼胶127可以通过涂覆连接在振动膜122和固定件121之间。示例的，可以通过在振动膜122和固定件121之间涂覆胶水，然后用紫外光固化胶水，即通过紫外光光照射的方式对胶水进行固化形成阻尼胶127。阻尼胶127固化后的硬度低，在shore(00)粘度范围，且抗拉强度低，通常不到1MPa(常规胶水几十MPa)，以保证振动膜122的自由度不被阻尼胶127约束。
当然，在其他实施例中，振动膜还可以局部通过阻尼胶连接于固定件。或者，弹性连接件还可以是除阻尼胶以外的其他弹性连接结构，例如弹性连接泡棉等，只要能起到连接振动膜与第一固定件(或第二固定件)，使振动膜在振动时不会拍打第一凸起和第二凸起，且不会约束振动膜的自由度即可。
在其他实施例中，图22所示的压电扬声器10的振动组件12也可以包括连接在振动膜122和固定件121之间的弹性连接件。
请参阅图28和图29，图28是图2所示的压电扬声器10的另一实施例的结构示意图。图29是图28所示的压电扬声器10的分解结构示意图。
本实施例中的压电扬声器10与图2所示的压电扬声器10的结构大致相同，相同的部分不再赘述。不同的是，本实施例中第一固定件1211和壳体11为一体成型结构。通过将第一固定件1211和壳体11限定位一体成型结构，从而第一固定件1211和壳体11可以通过嵌件成型等工艺形成。由于第一固定件1211和壳体11组成的一个整体的结构，从而减少了第一固定件1211组装于壳体11的步骤，提高产品生产效率。
请参阅图30，图30是图2所示的压电扬声器10的另一实施例的结构示意图。
本实施例中的压电扬声器10与图2所示的压电扬声器10的结构大致相同，相同的部分不再赘述。不同的是，本实施例中的壳体11为圆柱状，对应的振动组件12也为圆形。圆形压电扬声器10可以用于头戴耳机产品，也可以应用于其他产品。当然，在其他实施例中，压电扬声器10还可以根据需要设置成不同形状。
请参阅图31和图32，图31是图30所示的压电扬声器10的另一实施例的剖面结构示意图。图32是图31所示的压电扬声器10的部分结构的俯视结构示意图。
本实施例中的压电扬声器10与图31所示的压电扬声器10的结构大致相同，相同的部分不再赘述。不同的是，本实施例中的振动膜122的中部镂空，相适应的，本申请中的振动传递粘接层124对应振动膜122镂空的位置也为镂空。本申请通过将振动膜122的中部设置为镂空结构，能够减少振动膜122和振源123的粘接区域，减少粘接对振源123的震动的约束，从而减少振源123的能量耗散，达到提升灵敏度的目的。当然，在其他实施例中，振动膜122的也可以不镂空。
本申请未设有第一配重件，第二配重件126a设于振动膜122远离振源123的一侧。第二配重件126a为环形结构。第二配重件126a采用白色刚性光敏树脂材料制成，可以通过背胶与振动膜122粘接，也可通过胶水固定于振动膜122。振动膜122用于改善频响曲线高频峰谷，减小低频失真，达到全频段失真低于2％的水平，提升用户听感。当然，在其他实施例中，第二配重件还可以为多个块状件，多个块状件间隔设置于振动膜122。
请参阅图33，图33是本申请中的压电扬声器10与传统的压电扬声器10的对比图。
如图33，本申请的压电扬声器10(包括第二配重件126)和传统压电扬声器10(不包括第二配重件126)在同等测试条件下(交流电压、消音室自由场环境和100Hz～20kHz扫频信号等均相同)测试。其中L11和L12分别为传统压电扬声器10和本申请压电扬声器10的失真曲线。通过对比，本申请压电扬声器10将30Hz频点失真由4.5％降低至1.8％，将260Hz频点失真由2.7％降低至1.2％；本实施例的全频段失真低于2％，显著改善压电扬声器10低频失真，达到耳机扬声器失真水平。
请参阅图34和图35，图34是图1所示的电子设备1000中的另一种实施例的结构示意图。图35是图34所示结构的部分结构的分解结构示意图。
本实施例中的电子设备1000与图1所示的电子设备1000的结构大致相同，相同的部分不再赘述。不同的是，本实施例中的压电扬声器10a的腔体由壳体11a和振动组件12组成，其中，壳体11a可以为外壳100的一部分。也就是说，压电扬声器10a的腔体由振动组件12和外壳100组成。
示例的，外壳100包括边框1001、后盖1002和围墙1004。边框1001连接后盖1002的边缘，围墙1004连接于后盖1002朝向显示模组200的表面，并与后盖1002形成如图2所示压电扬声器10的壳体11，振动组件12连接于围墙1004背向后盖1002的一侧，以与围墙1004和后盖1002共同构成压电扬声器10a的腔体。可以理解的是，相对于图2的压电扬声器10，本实施例中的压电扬声器10a的腔体部分由后盖1002的部分结构形成，有效利用后盖1002形成壳体11a，减少了压电扬声器占用电子设备1000的空间，有利于电子设备1000的薄型化。
示例的，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。围墙1004于后盖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。
当然，在其他实施例中，壳体11a还可以为边框1001或主板500的一部分。或者，外壳100还可以包括中框，壳体11a为中框的一部分。
可以理解的是，振动组件12的具体结构、壳体11a与振动组件12的配合关系与图2所 示的压电扬声器10的振动组件12的具体结构、壳体11与振动组件12的配合关系相同，不再赘述。
在一些实施例中，振动组件12的第一固定件可以与壳体11a为一体成型结构。也就是说，第一固定件可以与后盖1002为一体成型结构，减少了第一固定件固定于壳体11a(后盖1002)的步骤，提高产品生产效率。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合，不同实施例中的特征任意组合也在本申请的保护范围内，也就是说，上述描述的多个实施例还可根据实际需要任意组合。
以上，仅为本申请的部分实施例和实施方式，本申请的保护范围不局限于此，任何熟知本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。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (23)

  1. 一种压电扬声器，其特征在于，所述压电扬声器包括第一固定件、第二固定件、振动膜以及振源，所述第二固定件固定连接所述第一固定件，所述第一固定件包括第一凸起，第二固定件包括第二凸起，所述第二凸起与所述第一凸起相对设置，所述振动膜包括中部和边缘部，所述中部位于所述边缘部的内侧，所述边缘部包括夹持部分和非夹持部分，所述夹持部分夹持于所述第一凸起和所述第二凸起之间，所述非夹持部分位于所述夹持部分背离所述中部的一侧，所述第一凸起和所述第二凸起共同形成简支支撑结构，以支撑所述振动膜，所述振源与所述振动膜相固定。
  2. 根据权利要求1所述的压电扬声器，其特征在于，所述振动组件还包括弹性连接件，所述弹性连接件一端连接所述第一固定件，另一端连接所述振动膜；或所述弹性连接件一端连接所述第二固定件，另一端连接所述振动膜。
  3. 根据权利要求2所述的压电扬声器，其特征在于，所述弹性连接件一端连接所述第一凸起，另一端连接所述振动膜。
  4. 根据权利要求2所述的压电扬声器，其特征在于，所述第一凸起包括相背设置的第一侧面和第二侧面，所述第一侧面靠近所述中部，所述第二侧面背离所述中部，所述弹性连接件一端连接所述第一侧面，另一端连接所述振动膜；或者，所述弹性连接件一端连接所述第二侧面，另一端连接所述振动膜。
  5. 根据权利要求2所述的压电扬声器，其特征在于，所述第一凸起包括相背设置的第一侧面和第二侧面，所述第一侧面靠近所述中部，所述第二侧面背离所述中部，所述第一侧面形成凹槽，所述弹性连接件一端连接于所述凹槽的槽壁，另一端连接所述振动膜。
  6. 根据权利要求1至5中任一项所述的压电扬声器，其特征在于，所述第一凸起和所述第二凸起采用弹性材料制成。
  7. 根据权利要求1至6中任一项所述的压电扬声器，其特征在于，所述第一凸起和所述振动膜之间为线接触，所述第一凸起和所述振动膜接触的线沿所述边缘部的周缘延伸。
  8. 根据权利要求7所述的压电扬声器，其特征在于，所述第一凸起朝向所述振动膜的一端为尖状，或者第一凸起朝向所述振动膜的一端的端面为圆弧面。
  9. 根据权利要求1至6中任一项所述的压电扬声器，其特征在于，所述第一凸起和所述振动膜之间为面接触，所述第一凸起和所述振动膜接触的面沿所述边缘部的周缘延伸。
  10. 根据权利要求7至9中任一项所述的压电扬声器，其特征在于，所述第二凸起和所述振动膜之间为线接触，所述第二凸起和所述振动膜接触的线沿所述边缘部的周缘延伸。
  11. 根据权利要求10所述的压电扬声器，其特征在于，第二凸起朝向所述振动膜的一端为尖状，或者第二凸起朝向所述振动膜的一端的端面为圆弧面。
  12. 根据权利要求7至9中任一项所述的压电扬声器，其特征在于，所述第二凸起和所述振动膜之间为面接触，所述第二凸起和所述振动膜接触的面沿所述边缘部的周缘延伸。
  13. 根据权利要求1至12中任一项所述的压电扬声器，其特征在于，所述第一固定件包括连接的第一卡持部和第一连接部，第二固定件包括连接的第二卡持部和第二连接部，所述第一凸起形成于所述第一卡持部，所述第二凸起形成于第二卡持部，所述第一连接部和所述第二连接部固定，以将所述振动膜夹持于所述第一凸起和所述第二凸起之间。
  14. 根据权利要求13所述的压电扬声器，其特征在于，所述第一凸起的数量为一个，所述第一凸起设于所述第一卡持部；或者，所述第一凸起的数量为多个，多个所述第一凸起间 隔设于所述第一卡持部。
  15. 根据权利要求1至14中任一项所述的压电扬声器，其特征在于，所述振动组件还包括第一配重件，所述第一配重件固定于所述振源的中部。
  16. 根据权利要求1至15中任一项所述的压电扬声器，其特征在于，所述振动组件还包括第二配重件，所述第二配重件固定于所述振动膜。
  17. 根据权利要求16所述的压电扬声器，其特征在于，所述第二配重件靠近所述振源设置。
  18. 根据权利要求17所述的压电扬声器，其特征在于，所述振动膜还包括连接部，所述连接部连接所述中部与所述边缘部之间；所述振源与所述中部相固定，所述第二配重件设于所述连接部，并靠近所述中部设置，所述连接部包括第一宽度，所述第二配重件位于1/4所述第一宽度～1/3所述第一宽度之间。
  19. 根据权利要求1至18中任一项所述的压电扬声器，其特征在于，所述振动膜的中部镂空。
  20. 根据权利要求1至19中任一项所述的压电扬声器，其特征在于，所述压电扬声器还包括壳体，所述第一固定件背离所述第二固定件的一侧固定连接至所述壳体。
  21. 根据权利要求20所述的压电扬声器，其特征在于，所述第一固定件和所述壳体为一体成型结构。
  22. 一种电子设备，其特征在于，所述电子设备包括外壳和权利要求1至21中任一项所述的压电扬声器，所述压电扬声器设于所述外壳内侧。
  23. 一种电子设备，其特征在于，所述电子设备包括外壳和权利要求1至20中任一项所述的压电扬声器，所述压电扬声器设于所述外壳内侧，所述压电扬声器和所述外壳形成腔体。
PCT/CN2022/101518 2021-06-30 2022-06-27 压电扬声器以及电子设备 WO2023274148A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110738523.6 2021-06-30
CN202110738523.6A CN115550822B (zh) 2021-06-30 2021-06-30 压电扬声器以及电子设备

Publications (1)

Publication Number Publication Date
WO2023274148A1 true WO2023274148A1 (zh) 2023-01-05

Family

ID=84690095

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/101518 WO2023274148A1 (zh) 2021-06-30 2022-06-27 压电扬声器以及电子设备

Country Status (2)

Country Link
CN (1) CN115550822B (zh)
WO (1) WO2023274148A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4430529A (en) * 1980-12-24 1984-02-07 Murata Manufacturing Co., Ltd. Piezoelectric loudspeaker
CN202750226U (zh) * 2012-07-31 2013-02-20 广州市番禺奥迪威电子有限公司 一种点约束压电扬声器
JP2013074464A (ja) * 2011-09-28 2013-04-22 Mitsubishi Electric Corp 動電型放音体
WO2013141373A1 (ja) * 2012-03-23 2013-09-26 ヤマハ株式会社 スピーカ用振動板
CN207665202U (zh) * 2017-11-21 2018-07-27 商丘华亿通电子科技有限公司 一种手持式扩音器
CN113055794A (zh) * 2019-12-28 2021-06-29 华为技术有限公司 扬声器内核、扬声器模组和电子设备

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1174911A (en) * 1966-06-20 1969-12-17 Audio & Design Ltd Improvements in or relating to Electro-Acoustic Transducers
JP2894276B2 (ja) * 1996-05-02 1999-05-24 日本電気株式会社 圧電音響変換器
ATE485685T1 (de) * 2006-06-08 2010-11-15 Nxp Bv Akustische vorrichtung und deren herstellungsverfahren
EP2088801B1 (en) * 2006-11-09 2014-05-07 NEC Corporation Piezoelectric speaker and electronic apparatus with piezoelectric speaker
CN102761801B (zh) * 2012-04-28 2015-03-11 李世煌 模块型音箱构件
CN203984643U (zh) * 2014-06-10 2014-12-03 常州声泰龙电子音响有限公司 无源辐射器
CN204350297U (zh) * 2015-02-06 2015-05-20 歌尔声学股份有限公司 压电扬声器
DE102017204006B3 (de) * 2017-03-10 2018-08-02 Infineon Technologies Ag MEMS-Schallwandler, MEMS-Mikrophon und Verfahren zum Bereitstellen eines MEMS-Schallwandlers
CN106954145A (zh) * 2017-03-31 2017-07-14 苏州逸巛声学科技有限公司 一种应用于受话器的振膜机构
CN206865731U (zh) * 2017-06-09 2018-01-09 绍兴创乐电子有限公司 一种微型扬声器用腰形音膜
JP2019029748A (ja) * 2017-07-27 2019-02-21 学校法人ものつくり大学 圧電振動体およびこれを用いた圧電スピーカ
CN209526874U (zh) * 2018-12-30 2019-10-22 瑞声科技(新加坡)有限公司 扬声器
CN110545514B (zh) * 2019-08-16 2021-01-08 瑞声声学科技(深圳)有限公司 压电式mems麦克风
CN113037904A (zh) * 2019-12-25 2021-06-25 华为技术有限公司 扬声器模组和电子设备
CN113055791B (zh) * 2019-12-28 2022-10-28 荣耀终端有限公司 扬声器内核、扬声器模组及电子设备
CN212064059U (zh) * 2020-03-26 2020-12-01 华为技术有限公司 电子设备
CN211909160U (zh) * 2020-04-09 2020-11-10 精拓丽音科技（北京）有限公司 扬声器及电子设备
CN213094482U (zh) * 2021-03-19 2021-04-30 共达电声股份有限公司 一种微型扬声器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4430529A (en) * 1980-12-24 1984-02-07 Murata Manufacturing Co., Ltd. Piezoelectric loudspeaker
JP2013074464A (ja) * 2011-09-28 2013-04-22 Mitsubishi Electric Corp 動電型放音体
WO2013141373A1 (ja) * 2012-03-23 2013-09-26 ヤマハ株式会社 スピーカ用振動板
CN202750226U (zh) * 2012-07-31 2013-02-20 广州市番禺奥迪威电子有限公司 一种点约束压电扬声器
CN207665202U (zh) * 2017-11-21 2018-07-27 商丘华亿通电子科技有限公司 一种手持式扩音器
CN113055794A (zh) * 2019-12-28 2021-06-29 华为技术有限公司 扬声器内核、扬声器模组和电子设备

Also Published As

Publication number Publication date
CN115550822B (zh) 2024-06-25
CN115550822A (zh) 2022-12-30

Similar Documents

Publication Publication Date Title
WO2020186971A1 (zh) 振动发声装置和电子设备
US9553960B1 (en) Loudspeaker with laminate panel for mobile computing platforms
CN110557705B (zh) 电子设备
CN113055794B (zh) 扬声器内核、扬声器模组和电子设备
WO2020140540A1 (zh) 扬声器箱
JP2012114747A (ja) 開口用の被覆ユニット、およびそれを備えた電子機器
US9288582B2 (en) Suspension system for micro-speakers
WO2021197114A1 (zh) 一种电子设备
WO2021139632A1 (zh) 扬声器、扬声器模组及电子设备
US9271084B2 (en) Suspension system for micro-speakers
CN114401477A (zh) 扬声器模组和电子设备
WO2022042317A1 (zh) 一种电声换能器、扬声器模组及电子设备
US10291990B2 (en) Unibody diaphragm and former for a speaker
US10820115B2 (en) Speaker
WO2023274148A1 (zh) 压电扬声器以及电子设备
US20160127824A1 (en) Woofer speaker and the rear sound cavity forming method thereof
WO2023071887A1 (zh) 扬声器及电子设备
US20230283945A1 (en) Speaker device and electronic equipment
WO2021129333A1 (zh) 扬声器内核、扬声器模组及电子设备
US10827243B1 (en) Method and apparatus for fabricating an information handling system with a vibration actuator speaker system assembly
US20170013333A1 (en) Mobile terminal
CN210518433U (zh) 电子设备
CN111262982A (zh) 电子设备
CN113348678A (zh) 具有显示面板扬声器的电子装置
WO2021169410A1 (zh) 一种电子设备的振动组件和电子设备

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: 22831962

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22831962

Country of ref document: EP

Kind code of ref document: A1