CN110602614A - Sound production device and electronic equipment - Google Patents
Sound production device and electronic equipment Download PDFInfo
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- CN110602614A CN110602614A CN201910849665.2A CN201910849665A CN110602614A CN 110602614 A CN110602614 A CN 110602614A CN 201910849665 A CN201910849665 A CN 201910849665A CN 110602614 A CN110602614 A CN 110602614A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
Abstract
The embodiment of the application provides a sound generating mechanism and electronic equipment, sound generating mechanism includes: the first shell is provided with a first opening and a second opening, and the first opening and the second opening are both communicated with the outside of the electronic equipment; the second shell is arranged in the first shell and provided with a first cavity and a second cavity, the opening of the first cavity is communicated with the first opening hole, and the opening of the second cavity is communicated with the second opening hole; the sounding unit is arranged in the second shell and used for sending a sound signal, and the sound signal is transmitted to the outside through the first cavity and the first opening; the second cavity is used for providing a vibration space for the sounding unit to send out a sound signal. This application embodiment is through with second cavity and external intercommunication, vibration space when having increased the sound generating unit sound production for sound generating unit can have bigger amplitude, thereby improves sound generating mechanism's broadcast effect.
Description
Technical Field
The present disclosure relates to electronic devices, and particularly to a sound generating apparatus and an electronic device.
Background
The speaker is an indispensable component of modern electronic equipment, and whether playing music, watching video, playing games, carrying out hands-free calls and the like, the speaker of the electronic equipment is required to be relied on to emit sound. With the development of electronic device technology, people put higher demands on the performance of speakers. In order to achieve playing effects of higher loudness, more sound frequency which can be covered by low frequency and more stereo sound, the loudspeaker needs to have larger amplitude. The existing scheme can not effectively increase the amplitude of the loudspeaker, and the sound production effect of the loudspeaker is poor.
Disclosure of Invention
The embodiment of the application provides a sound generating device and electronic equipment, and the sound generating effect of the electronic equipment can be improved.
The embodiment of the application realizes the aim through the following technical scheme.
The embodiment of the application provides a sound generating mechanism, includes:
the first shell is provided with a first opening and a second opening, and the first opening and the second opening are communicated with the outside;
the second shell is arranged in the first shell and provided with a first cavity and a second cavity, the opening of the first cavity is communicated with the first opening hole, and the opening of the second cavity is communicated with the second opening hole; and
the sounding unit is arranged in the second shell and used for sounding a sound signal, and the sound signal is transmitted to the outside through the first cavity and the first opening;
the second cavity is used for providing a vibration space for the sounding unit to send out a sound signal.
The embodiment of the application also provides the electronic equipment with the sound generating device.
The embodiment of the application provides sound generating mechanism and electronic equipment, through with second cavity and external intercommunication to second cavity and whole external space have increased the vibration space when sound generating unit sound production as sound generating unit's equivalent back cavity, make sound generating unit can have bigger amplitude, thereby improve sound generating mechanism's broadcast effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a first structural schematic diagram of an electronic device according to an embodiment of the present application.
Fig. 2 is a second schematic structural diagram of an electronic device according to an embodiment of the present application.
Fig. 3 is a first structural schematic diagram of a sound generating device according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a second sound generating device according to an embodiment of the present application.
Fig. 5 is a third schematic structural diagram of a sound generating device according to an embodiment of the present application.
Fig. 6 is a fourth structural schematic diagram of a sound generating device according to an embodiment of the present application.
Fig. 7 is a fifth structural schematic diagram of a sound generating device according to an embodiment of the present application.
Fig. 8 is a schematic structural diagram of a piezoelectric ceramic single body in the sound generating device shown in fig. 7.
Fig. 9 is a schematic structural view of the piezoelectric ceramic unit shown in fig. 8 in a first bending state.
Fig. 10 is a structural diagram of the piezoelectric ceramic unit shown in fig. 8 in a second bending state.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides electronic equipment. The electronic device may be a smart phone, a tablet computer, or other devices, and may also be a game device, an AR (Augmented Reality) device, an automobile device, a data storage device, an audio playing device, a video playing device, a notebook computer, a desktop computing device, or other devices.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. The electronic device 10 includes a display screen 100, a cover plate 200, a middle frame 300, a circuit board assembly 400, a battery 500, a rear cover 600, and a sound emitting device 700. It is understood that the structure of the electronic device 10 provided in the embodiment of the present application is not limited thereto, and may further include other components, for example, the electronic device 10 may further include a camera, a flash, and the like, which is not limited thereto in the embodiment of the present application.
Among them, the display screen 100 may be mounted on the middle frame 300 and connected to the rear cover 600 through the middle frame 300 to form a display surface of the electronic device 10. The display screen 100 serves as a front case of the electronic device 10, and forms a housing of the electronic device 10 together with the rear cover 600, for accommodating other electronic elements or functional components of the electronic device 10. Meanwhile, the display screen 100 forms a display surface of the electronic device 10 for displaying information such as images, texts, and the like. The display screen 100 may be a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) display screen.
In some embodiments, the display screen 100 may include a display area and a non-display area. Wherein the display area performs a display function of the display screen 100 for displaying information such as images, text, and the like; the non-display area does not display information and can be used for setting functional components such as a camera and a display screen touch electrode.
In some embodiments, the display screen 100 may be a full-screen display, as shown in fig. 2, and fig. 2 is a second structural schematic diagram of an electronic device provided in the embodiments of the present application. At this time, the display screen 100 may display information in full screen, so that the electronic device 10 has a larger screen occupation ratio. The display screen 100 includes only a display region and does not include a non-display region, or the non-display region has a small area for a user. At this time, functional components such as a camera and a proximity sensor in the electronic device 10 may be hidden under the display screen 100, and the fingerprint recognition module of the electronic device 10 may be disposed on the back of the electronic device 10.
The cover plate 200 may be mounted on the middle frame 300, and the cover plate 200 covers the display screen 100 to protect the display screen 100 from being scratched or damaged by water. The cover 200 may be a transparent glass cover, so that a user can see the contents displayed on the display screen 100 through the cover 200. In some embodiments, the cover plate 200 may be a glass cover plate of sapphire material.
The middle frame 300 may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The middle frame 300 is used for providing a supporting function for the electronic components or functional assemblies in the electronic device 10, so as to mount the electronic components or functional assemblies in the electronic device 10 together. For example, functional components such as a camera, a receiver, the circuit board assembly 400, and the battery 500 in the electronic device 10 may be mounted on the middle frame 300 to be fixed. In some embodiments, the material of the middle frame 300 may include metal or plastic.
The circuit board assembly 400 may be mounted on the middle frame 300. The circuit board assembly 400 may be a motherboard of the electronic device 10. A ground point is provided on the circuit board assembly 400 to achieve grounding of the circuit board assembly 400. One, two or more functional components such as a microphone, a speaker, a receiver, an earphone interface, a universal serial bus interface (USB interface, hereinafter referred to as USB interface), a camera, a distance sensor, an ambient light sensor, a gyroscope, a processor, and a memory may be integrated on the circuit board assembly 400. Meanwhile, the display screen 100 may be electrically connected to the circuit board assembly 400.
In some embodiments, display control circuitry is disposed on circuit board assembly 400. The display control circuit outputs an electrical signal to the display screen 100 to control the display screen 100 to display information.
The battery 500 may be mounted on the middle frame 300. Meanwhile, the battery 500 is electrically connected to the circuit board assembly 400 to enable the battery 500 to power the electronic device 10. The circuit board assembly 400 may be provided thereon with a power management circuit. The power management circuit is used to distribute the voltage provided by battery 500 to the various electronic components in electronic device 10.
The rear cover 600 is used to form the outer contour of the electronic device 10. The rear cover 600 may be integrally formed. In the forming process of the rear cover 600, a microphone hole, a speaker hole, a receiver hole, an earphone hole, a USB interface hole, a rear camera hole, a fingerprint identification module mounting hole, and the like may be formed on the rear cover 600.
In some embodiments, the rear cover 600 may be a metal housing, such as a metal of magnesium alloy, stainless steel, or the like. Note that the material of the rear cover 600 according to the embodiment of the present application is not limited to this, and other methods may be adopted. For example, the rear cover 600 may be a plastic housing. As another example, the rear cover 600 may be a ceramic case. For another example, the rear cover 600 may include a plastic part and a metal part, and the rear cover 600 may be a housing structure in which the metal and the plastic are matched with each other. Specifically, the metal part may be formed first, for example, a magnesium alloy substrate is formed by injection molding, and then plastic is injected on the magnesium alloy substrate to form a plastic substrate, so as to form a complete housing structure.
It should be noted that the sound generating devices used in modern electronic devices generally have a sound generating unit, a front cavity and a rear cavity. The sounding unit is used for converting the electric signal into an acoustic signal and sounding through vibration; the front cavity is used for diffusing the sound emitted by the sound generating unit to the outside, so that the sound transmission effect is improved; and the rear cavity is used for providing a vibration space for the sound generating unit to generate sound. The loudness and the low-frequency intensity of the loudspeaker are positively correlated with the amplitude of the sound generating unit, and if the loudness is higher and the low-frequency coverable sound generating frequency is higher, the amplitude which can be reached by the low-frequency coverable sound generating unit is required to be higher. Under the prior art, when the sound generating unit is fixed, the amplitude is mainly enlarged by increasing the volume of the rear cavity. Because the sound volume of the air is smaller when the rear cavity is smaller, when the amplitude needs to be increased, the counter resistance of the air is larger, and the amplitude is difficult to increase; on the contrary, when the back cavity is larger, the sound volume of the air is larger, when the amplitude needs to be increased, the counter force of the air is smaller, the amplitude is easy to increase, and larger amplitude output can be easily realized by the same driving voltage.
Referring to fig. 3, fig. 3 is a first structural schematic diagram of a sound generating device according to an embodiment of the present disclosure. The sound emitting device 700 may include a first case such as the first case 710, a second case such as the second case 720, and a sound emitting unit such as the sound emitting unit 730.
The first housing 710 may be an outer shell of the electronic device 10. The first housing 710 is provided with a first opening 711 and a second opening 712, and both the first opening 711 and the second opening 712 are in communication with the outside of the electronic device 10. It is understood that the first opening 711 and the second opening 712 may each be a plurality of openings, such as the first opening 711 being a plurality of openings when the first opening 711 is a speaker opening of the electronic device 10. In some embodiments, the first opening 711 and the second opening 712 may be adhered with dust screens for use according to performance requirements and dust-proof requirements.
The second housing 720 may be disposed within the first housing 710. The second housing 720 has a first cavity 721 and a second cavity 722 that are not connected to each other. The opening 7210 of the first cavity 721 is disposed opposite to the first opening 711 of the first housing 710, the opening 7210 of the first cavity 721 is communicated with the first opening 711 of the first housing 710, and the opening 7210 of the first cavity 721 can be communicated with the outside of the electronic device 10 through the first opening 711. The opening 7220 of the second cavity 722 is disposed opposite to the second opening 712 of the first housing 710, the opening 7220 of the second cavity 722 is communicated with the second opening 712 of the first housing 710, and the opening 7220 of the second cavity 722 can be communicated with the outside of the electronic device 10 through the second opening 712. It is understood that the opening 7210 of the first cavity 721 and the first hole 711 may not be disposed opposite to each other, as long as the opening 7210 of the first cavity 721 is communicated with the first hole 711; the opening 7220 of the second cavity 722 and the second opening 712 may not be disposed opposite each other, so long as the opening 7220 of the second cavity 722 is in communication with the second opening 712.
The sound unit 730 may be disposed in the second housing 720, and the sound unit 730 is used for emitting a sound signal. A portion of the sound generating unit 730 is located in the first cavity 721, and another portion of the sound generating unit 730 is located in the second cavity 722, so that the first cavity 721 is used as a front cavity of the sound generating unit 730, the second cavity 722 and the outside of the electronic device 10 are used as a rear cavity of the sound generating unit 730. For example, the sound generating unit 730 may have a diaphragm disposed between the first cavity 721 and the second cavity 722, the diaphragm has a first surface and a second surface opposite to each other, the first surface of the diaphragm is communicated with the front cavity, and the second surface of the diaphragm is communicated with the back cavity. In the present embodiment, the position of the sound unit 730 is not limited to this, and other embodiments are also possible. For example, the sound generating unit 730 may be located in the second cavity 722, so long as the sound generating unit 730 is close to the first cavity 721, the first cavity 721 may achieve better sound amplification and transmission effects.
Compared with the prior art, the second cavity 722 and the external of the electronic device 10 are communicated in the embodiment of the application, the second cavity 722 and the external of the electronic device 10 are jointly used as the rear cavity of the sound generating unit 730, the vibration space of the sound generating unit 730 is greatly increased, the sound generating unit 730 can generate sound with larger amplitude, and the sound generating effect of the electronic device 10 is improved.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features.
Referring to fig. 4, fig. 4 is a second structural schematic diagram of a sound generating device according to an embodiment of the present disclosure. Unlike the sound generator shown in fig. 3, the sound generator shown in fig. 4 may further include a conduit 740 and a seal 750.
It should be noted that the prior art cannot process two absolutely close-fitting housings without a gap therebetween. Therefore, a gap is necessarily formed between the opening 7220 of the second cavity 722 and the communication position of the second opening 712, so that the inside of the first housing 710 and the inside of the second cavity 722 cannot be isolated from each other, when the sound generating unit 730 generates sound, the airflow generated by the air in the second cavity 722 due to the vibration of the sound generating unit 730 flows into the first housing 710, and the vibration of other devices inside the electronic device 10 is caused, which affects the user experience. In the embodiment, the conduit 740 is disposed at the position where the opening 7220 of the second cavity 722 communicates with the second opening 712 to enhance the sealing property, so that the inside of the first housing 710 is isolated from the inside of the second cavity 722. Therefore, the first housing 710 needs to be spaced apart from the second housing 720 to reserve a space for the duct 740.
One end of the conduit 740 is connected to the opening 7220 of the second cavity 722, the inner space of the conduit 740 is communicated with the second cavity 722, and the other end of the conduit is communicated with the second opening 712, so that the opening 7220 of the second cavity 722 can be communicated with the outside of the electronic device 10 through the second opening 712. The end of the conduit 740 is provided with a seal 750 to seal the communication position of the end of the conduit 740 so that the airflow in the second cavity 722 is communicated with the outside air of the electronic device 10 through the conduit 740 and the second opening 712 without leaking into the interior of the first housing 710. The sealing member 750 may be a sealing foam, or may be other materials such as silica gel, which is not limited in this embodiment.
The conduit 740 may be disposed at the opening 7220 of the second lumen 722 and be integrally formed with the second lumen 722, such that there is no gap at the end of the conduit 740 in communication with the second lumen 722, and a seal 750 may be disposed at the end of the conduit 740 in communication with the second aperture 712.
In some embodiments, the conduit 740 may be disposed at the second opening 712 of the first housing 710 and be integrally formed with the first housing 710, and thus there is no gap at the end of the conduit 740 in communication with the second opening 712, and only the seal 750 may be disposed at the end of the conduit 740 in communication with the second cavity 722.
In some embodiments, the conduit 740 may be separately formed and not integrally formed with the second cavity 722 and the first housing 710, and the sealing member 750 may be disposed at both the end of the conduit 740 communicating with the second cavity 722 and the end of the conduit 740 communicating with the second opening 712.
Referring to fig. 5 and fig. 6, fig. 5 is a third structural schematic diagram of the sound generating device according to the embodiment of the present application, and fig. 6 is a fourth structural schematic diagram of the sound generating device according to the embodiment of the present application. In the sound emitting device shown in fig. 5 and 6, the second opening 712 of the first housing 710 is also used for setting a functional interface of the electronic device 10.
In some embodiments, the first opening 711 of the first housing 710 may be a speaker hole of the electronic device 10, the second opening 712 of the first housing 710 may be a USB hole of the electronic device 10, and the second opening 712 may be used to provide a USB interface of the electronic device 10. The first housing 710 further has a third opening 713, and one end of the conduit 740 is connected to the second cavity 722 and the other end is connected to the third opening 713, so that the opening 7220 of the second cavity 722 is connected to the second opening 712 through the third opening 713.
In some embodiments, the first opening 711 of the first housing 710 may be a speaker opening of the electronic device 10, the second opening 712 of the first housing 710 may be an earphone opening of the electronic device 10, and the second opening 712 may be used to provide a headphone interface of the electronic device 10. The first housing 710 further has a fourth opening 714, one end of the conduit 740 is connected to the second cavity 722, and the other end is connected to the fourth opening 714, so that the opening 7220 of the second cavity 722 is connected to the second opening 712 via the fourth opening 714.
The orientations of the third opening 713 and the fourth opening 714 are not limited to those shown in the drawings, and may be in other embodiments. Such as: the third opening 713 is oriented perpendicular to the second opening 712, and the fourth opening 714 is oriented in the same direction as the second opening 712, such as: the third opening 713 is oriented in the same direction as the second opening 712, and the fourth opening 714 is also oriented in the same direction as the second opening 712, for example: the third opening 713 is oriented perpendicular to the second opening 712, and the fourth opening 714 is also oriented perpendicular to the second opening 712. The embodiments of the present application do not limit this.
It should be noted that the above-mentioned terms "third" and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
Referring to fig. 7, fig. 7 is a schematic view illustrating a fifth structure of a sound generating device according to an embodiment of the present disclosure. In the sound generating device 700 shown in fig. 7, the sound generating unit 730 may be a piezoelectric sound generating unit, for example, the sound generating unit 730 may include one or more piezoelectric ceramic units. It is understood that "a plurality" means two or more. The piezoelectric ceramic monomer is made of ceramic materials and can convert mechanical energy and electric energy into each other. When the piezoelectric ceramic monomer converts the electric energy into the mechanical energy, the piezoelectric ceramic monomer may output a sound signal, and at this time, the piezoelectric ceramic monomer may be used as a receiver or a speaker of the electronic device 10; when the piezoelectric ceramic single body converts mechanical energy into electrical energy, the piezoelectric ceramic single body may collect a sound signal, and at this time, the piezoelectric ceramic single body may serve as a microphone of the electronic device 10. The sound emitting unit 730 may be an electric sound emitting unit, which is not limited in the embodiment of the present application.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a piezoelectric ceramic single body in the sound generating device shown in fig. 7. The shape of the piezoelectric ceramic single body may be a regular shape, for example, the piezoelectric ceramic single body may have a rectangular structure, a rounded rectangular structure, a circular structure, or the like. The piezoelectric ceramic single body can also be irregular in shape.
The piezoelectric ceramic single body may include a first piezoelectric ceramic sheet 731, a diaphragm 732, and a second piezoelectric ceramic sheet 733, which are stacked. The first piezoelectric ceramic piece 731 and the second piezoelectric ceramic piece 733 are conductors, and may be used to conduct current. Diaphragm 732 is non-conductive and may not be used to conduct current.
The size of the diaphragm 732 is larger than the sizes of the first and second piezoelectric ceramic plates 731 and 733. The diaphragm 732 may include a first region and a second region, the second region being disposed at a periphery of the first region. For example, the second region may be disposed around the periphery of the first region. The first piezoelectric ceramic piece 731 and the second piezoelectric ceramic piece 733 are disposed in the first region, so that the second region is exposed.
The first piezoelectric ceramic piece 731 and the second piezoelectric ceramic piece 733 are respectively electrically connected to an ac power source of the electronic device 10, such as the ac power source 800, for converting the electric energy output by the ac power source 800 into mechanical energy. The ac power source 800 is used to output an ac voltage, and the ac power source 800 may include a first electrode 810 and a second electrode 820 having different potential values.
The first piezoceramic sheet 731 has a first end surface and a second end surface opposite to the first end surface, wherein the first end surface is a surface away from the diaphragm 732, and the second end surface is a surface connected to the first region. The first end surface is electrically connected to the first electrode 810 of the ac power supply 800, and the second end surface is electrically connected to the second electrode 820 of the ac power supply 800.
The second piezoceramic sheet 733 has a third end surface and a fourth end surface opposite to each other, wherein the third end surface is a surface connected to the first region, and the fourth end surface is a surface away from the diaphragm 732. The third end surface is electrically connected to the second electrode 820 of the ac power supply 800, and the fourth end surface is electrically connected to the first electrode 420 of the ac power supply 800.
Referring to fig. 9 and 10 together, fig. 9 is a schematic structural diagram of the piezoelectric ceramic single body shown in fig. 8 in a first bending state, and fig. 10 is a schematic structural diagram of the piezoelectric ceramic single body shown in fig. 8 in a second bending state.
The alternating voltage direction of the alternating current power supply 800 can change along with the direction along with time, the piezoelectric ceramic single body can perform deformation motion along with the alternating change of the alternating voltage direction, and the deformation motion of the piezoelectric ceramic single body can enable surrounding air to flow, so that sound is generated.
As shown in fig. 9, when the alternating voltage direction of the ac power supply 800 is output from the first electrode 810 and returns to the second electrode 820, the first piezoelectric ceramic piece 731 and the second piezoelectric ceramic piece 733 are polarized in a preferred orientation along the electric field direction under the action of the electric field, and the external electric field direction of the first piezoelectric ceramic piece 731 is opposite to the external electric field direction of the second piezoelectric ceramic piece 733, so that the polarization direction of the first piezoelectric ceramic piece 731 is opposite to the polarization direction of the second piezoelectric ceramic piece 733, the polarization direction of the first piezoelectric ceramic piece 731 is the same as the voltage direction of the ac power supply 800, and the first piezoelectric ceramic piece 731 is extended to bend the first piezoelectric ceramic piece 731 toward the vibrating diaphragm 732; the polarization direction of the second piezoelectric ceramic sheet 733 is opposite to the voltage direction of the ac power supply 800, the second piezoelectric ceramic sheet 733 is shortened, the second piezoelectric ceramic sheet 733 is bent in a direction away from the vibrating diaphragm 732, and the vibrating diaphragm 732 is also deformed under the action of the first piezoelectric ceramic sheet 731 and the second piezoelectric ceramic sheet 733, so that the piezoelectric ceramic monomer exhibits the first bending state.
As shown in fig. 10, when the alternating voltage direction of the ac power supply 800 is output from the second electrode 820 and returns to the first electrode 810, the polarization direction of the first piezoelectric ceramic piece 731 is opposite to the voltage direction of the ac power supply 800, the first piezoelectric ceramic piece 731 is shortened, the first piezoelectric ceramic piece 731 is bent in a direction away from the vibrating diaphragm 732, the second piezoelectric ceramic piece 733 is extended, the second piezoelectric ceramic piece 733 is bent in a direction toward the vibrating diaphragm 732, and the vibrating diaphragm 732 is also deformed under the action of the first piezoelectric ceramic piece 731 and the second piezoelectric ceramic piece 733, so that the piezoelectric ceramic monomer assumes a second bending state.
The electronic device 10 may control the alternating voltage of the alternating current power supply 800 to switch the piezoelectric ceramic single body between the first bending state and the second bending state, so as to control the piezoelectric ceramic single body to perform the deformation motion.
Wherein, the deformation amplitude of the piezoelectric ceramic monomer can be related to the voltage amplitude of the alternating voltage. For example, the deformation amplitude of the piezoelectric ceramic body can be proportional to the voltage amplitude of the alternating voltage. When the electronic device 10 controls the voltage amplitude of the alternating voltage of the alternating current power supply 800 to rise, the deformation amplitude of the piezoelectric ceramic monomer is increased, and stronger air fluctuation can be driven to form larger volume, so that the loudness of the audio signal is increased. Of course, it is also possible that the deformation amplitude of the piezoelectric ceramic single body is inversely proportional to the voltage amplitude of the alternating voltage, and at this time, the electronic device 10 may increase the deformation amplitude of the piezoelectric ceramic single body by decreasing the voltage amplitude of the alternating voltage.
In the embodiment of the present application, the first piezoelectric ceramic piece 731 and the second piezoelectric ceramic piece 733 are disposed in the first region, so that the second region of the diaphragm 732 is exposed to the outside, and the first region is deformed by the acting force applied by the first piezoelectric ceramic piece 731 and the second piezoelectric ceramic piece 733, and the second region maintains the original state without the action of external force, which can increase the deformation amplitude of the diaphragm 732 compared to the second region without the exposure.
It should be noted that the piezoelectric ceramic unit may also include only the first piezoelectric ceramic piece 731 and the diaphragm 732, and the first piezoelectric ceramic piece 731 may drive the diaphragm 732 to deform. Of course, the piezoelectric ceramic single body may also include a plurality of first piezoelectric ceramic pieces 731 and/or a plurality of second piezoelectric ceramic pieces 733, and the number of the first piezoelectric ceramic pieces 731 and the number of the second piezoelectric ceramic pieces 733 may be set according to practical situations, which is not limited in this embodiment of the application.
In the sound generating mechanism 700 that this application embodiment provided, through the second cavity 722 with sound generating mechanism 700 and the external intercommunication of electronic equipment 10 to the back cavity of sound generating unit 730 is regarded as jointly in second cavity 722 and the external of electronic equipment 10, vibration space when having increased sound generating unit 730 phonation, the air is very little to the reaction effect of sound generating unit 730 vibration, makes sound generating unit 730 can have bigger amplitude, thereby improves sound generating mechanism 700's broadcast effect. Meanwhile, since the inside of the second cavity 722 is isolated from the inside of the first housing 710, the airflow in the second cavity 722 circulates with the outside air of the electronic device 10 through the duct 740 and the second opening 712 and does not leak into the inside of the first housing 710, so that the airflow in the second cavity 722 can be prevented from directly impacting the internal structure of the electronic device 10 to generate vibration.
The sound generating device and the electronic device provided by the embodiment of the application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A sound generating device, comprising:
the first shell is provided with a first opening and a second opening, and the first opening and the second opening are communicated with the outside;
the second shell is arranged in the first shell and provided with a first cavity and a second cavity, the opening of the first cavity is communicated with the first opening hole, and the opening of the second cavity is communicated with the second opening hole; and
the sounding unit is arranged in the second shell and used for sounding a sound signal, and the sound signal is transmitted to the outside through the first cavity and the first opening;
the second cavity is used for providing a vibration space for the sounding unit to send out a sound signal.
2. The sound generating apparatus as claimed in claim 1, wherein the first casing is spaced from the second casing, the second casing is provided with a duct for closing a gap between the first casing and the second casing, one end of the duct is communicated with the opening of the second cavity, and the other end of the duct is communicated with the second opening.
3. The sound generator of claim 2, further comprising a seal disposed at an end of the conduit for closing a gap between the first housing and the second housing.
4. The sound generating apparatus of claim 1, wherein the second opening is further configured to provide a functional interface of the electronic device.
5. The apparatus according to claim 4, wherein the second opening is further configured to provide a first functional interface of the electronic device, the first housing is further provided with a third opening, the third opening is oriented in the same direction as the second opening, and the opening of the second cavity is communicated with the second opening through the third opening.
6. The apparatus according to claim 4, wherein the second opening is further configured to provide a second functional interface of the electronic device, the first housing further has a fourth opening, the fourth opening is oriented perpendicular to the second opening, and the opening of the second cavity is communicated with the second opening through the fourth opening.
7. The sound generating device according to any one of claims 1-6, wherein the sound generating unit is one or more piezoelectric ceramic units for generating sound.
8. The sound generating device according to claim 7, wherein the single piezoelectric ceramic comprises a first piezoelectric ceramic plate, a diaphragm and a second piezoelectric ceramic plate, which are stacked, the diaphragm comprises a first region and a second region, the second region is disposed at a periphery of the first region, and the first piezoelectric ceramic plate and the second piezoelectric ceramic plate are disposed in the first region so that the second region is exposed.
9. An electronic device, comprising a sound-generating device according to any one of claims 1 to 8.
10. The electronic device of claim 9, further comprising a functional interface disposed in the second opening, the functional interface configured to connect to an external device.
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| CN201910849665.2A CN110602614B (en) | 2019-09-09 | 2019-09-09 | Sound production device and electronic equipment |
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| CN201910849665.2A CN110602614B (en) | 2019-09-09 | 2019-09-09 | Sound production device and electronic equipment |
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