266 results about "Vibrating membrane" patented technology

The invention discloses an actuator structure and a liquid spraying device comprising the same, the actuator structure comprises a vibrating membrane, a piezoelectric material, a lower electrode and an upper electrode, the top surface and the bottom surface of the piezoelectric material are respectively connected to the upper electrode and the lower electrode, the vibrating membrane is connected to the bottom surface of the lower electrode, and the upper electrode is connected to the bottom surface of the piezoelectric material. The piezoelectric material is a single crystal piezoelectric film material. The liquid spraying device comprises the actuator structure. According to the actuator structure and the liquid spraying device comprising the actuator structure, the piezoelectric material is processed and manufactured by using the single crystal piezoelectric film material, so that the single crystal piezoelectric film material can be processed by using a wet etching technology, the problems in a dry etching process are effectively avoided, the preparation precision of the actuator structure is ensured, and the manufacturing cost of the actuator structure is reduced. The stability of the actuator structure is improved, and the manufacturing cost of the actuator structure is reduced.

The present disclosure relates to a display device which includes a cover window; a display panel disposed under the cover window; at least one plate disposed under the display panel; a vibration bracket attached to a lower portion of the at least one plate; and a vibration film attached to a lower portion of the vibration bracket, wherein the vibration bracket includes a leg protruding upward. A leg structure of the vibration bracket can reinforce vibrations in a depth direction, and a bridge structure can reinforce vibrations in a planar direction. A user may experience an in-depth haptic response and sound. The display device according to the present disclosure may be applied to a display for a vehicle.

An electroacoustic transducer includes a port that guides a component of at least a partial frequency band of a sound radiated from a first diaphragm in a direction opposite to a direction in which a front surface 38A of a second diaphragm faces, to an external space on a front surface side of the second diaphragm. As the port is provided, the electroacoustic transducer is configured such that a sound pressure of a synthesized sound in the vicinity of a crossover frequency of radiated sounds from the first diaphragm and the second diaphragm in a case in which a drive unit generates vibration is equal to or higher than a sound pressure of the radiated sound from only one of the first diaphragm and the second diaphragm at the crossover frequency.

The invention relates to the technical field of heat dissipation, in particular to a standing wave heat dissipation device and system, and the device comprises an active film and a passive film which are oppositely arranged. A standing wave cavity is arranged between the active film and the passive film. The cavity wall of the standing wave cavity is provided with an air flow hole channel. The active film and the passive film can vibrate in opposite directions at the same frequency, form standing waves in the standing wave cavity, continuously extrude gas in the cavity and present a surge state, so that the air in the standing wave cavity is continuously compressed and extruded from inside to outside to form an inside-outside pressure difference, and the gas in the standing wave cavity is repeatedly extruded to pass through the gas flow hole channel; and the air flow is jetted to the outside of the standing wave cavity at a high speed in a surge state to form a continuous constant high-speed air flow. When the standing wave heat dissipation device provided by the invention is used for heat dissipation, the active film and the passive film are subjected to reverse same-frequency vibration to form standing wave extrusion airflow, and compared with single vibration film vibration extrusion airflow, the airflow is faster, the efficiency is higher, and the heat dissipation effect is better.

A vibration sounding device includes a housing, a sounding unit, and a motor vibration system. The motor vibration system includes a vibration unit and elastic components, and the vibration unit includes coils. The sounding unit includes a frame, a vibration system, a magnetic circuit system, and a front cover. The vibration system includes a first vibration system and a second vibration system. The first vibration system surrounds the second vibration system and is coaxially disposed with the second vibration system. The first vibration system includes a first vibrating diaphragm and a first voice coil. The second vibration system includes a second vibrating diaphragm and a second voice coil. The magnetic circuit system is fixed to the housing. The magnetic circuit system includes a first magnetic gap and a second magnetic gap. The vibration sounding device is small in overall thickness and in size, and excellent in acoustic performance.

The utility model provides a pump body structure of a piezoelectric fan and the piezoelectric fan. The pump body structure of the piezoelectric fan comprises a piezoelectric vibrator, a pump body and a pump body, a vibrating diaphragm is arranged on one side of the piezoelectric vibrator; the vibrating membrane is provided with a first vent hole communicated with the interior of the piezoelectric vibrator; the piezoelectric vibrator is provided with a vibration node; a cavity; a first opening is formed in one side of the cavity; the side, close to the first vent hole, of the piezoelectric vibrator is located in the cavity, and the wall face of the first opening is connected with a vibration node through a flexible connecting piece so that the piezoelectric vibrator can be suspended in the first opening. A ventilation channel is formed in a space between the piezoelectric vibrator and the cavity; the cavity is provided with a second vent hole; the first ventilation hole, the ventilation channel, the second ventilation hole and the interior of the piezoelectric vibrator are communicated, and the second ventilation hole is formed below the vibrating membrane. According to the embodiment of the invention, vibration noise and airflow noise generated by the cavity due to vibration of the pump body of the piezoelectric fan can be reduced.

A liquid ejection head includes an actuator, a flow channel sheet, and a nozzle sheet, the actuator including an upper electrode, a lower electrode, a piezoelectric material, and a vibration membrane connected to a tip of the flow channel sheet, the piezoelectric material being disposed on the upper electrode, the piezoelectric material being disposed on the lower electrode, and the vibration membrane being disposed on the nozzle sheet. A pressure cavity is formed between the vibrating membrane and the flow channel piece, a nozzle opening is formed in the nozzle piece, the nozzle piece is connected to the bottom end of the flow channel piece, the nozzle opening is communicated with the pressure cavity, the top face and the bottom face of the piezoelectric material are connected to the upper electrode and the lower electrode respectively, and the piezoelectric material is arranged between the upper electrode and the lower electrode. The lower electrode is a common ground electrode, the lower electrode is connected to the top surface, back on to the pressure cavity, in the vibrating diaphragm, and the upper electrode is a signal electrode and corresponds to the pressure cavity. The preparation process is simple, the preparation stability of the liquid ejection head is improved, and the production cost is effectively reduced.

According to an embodiment, a sound absorption apparatus includes a front plate, an oscillator, a first frame member, a back plate, and a second frame member. The front plate includes sound holes. The first frame member is connected to the front plate and the oscillator, and forms a first space between the front plate and the oscillator. The second frame member is connected to the back plate and the oscillator, and forms a second space between the back plate and the oscillator. The oscillator includes a diaphragm, a third frame member and a central member which are attached to the diaphragm, and a connecting member coupling the third frame member and the central member. The first frame member includes a space dividing member that divides the first space.

The utility model discloses a three-dimensional (3D) ultrasonic sensor probe core, which comprises a shell, a vibrating diaphragm, a piezoelectric element and a plurality of ultrasonic receiving elements, the bottom of the shell is connected with the vibrating diaphragm, the shell is provided with a first through hole and a plurality of second through holes, the number of the second through holes is the same as that of the ultrasonic receiving elements, and the first through hole and the second through holes extend in the height direction of the shell; the piezoelectric element is arranged in the first through hole and is fixed on the vibrating diaphragm; the multiple ultrasonic receiving elements are arranged in the multiple second through holes in a one-to-one correspondence mode and fixed to the vibrating diaphragm or the side wall of the second through hole. The device is simple in structure, easy to manufacture and high in obstacle identification capability.

The invention relates to the technical field of sewage treatment, and discloses a membrane bioreactor and system based on piezoelectric vibration. The membrane component in the MBR comprises a composite membrane material and a membrane frame, the composite membrane material comprises a piezoelectric material and an MBR membrane material, the MBR membrane material is used for realizing solid-liquid separation; the piezoelectric material is used for driving the MBR membrane material to vibrate; and the membrane frame is used for fixing the two ends of the membrane filaments in the composite membrane material and providing membrane filament water producing and backwashing water channels and cable channels, so that the whole membrane component with certain mechanical strength is formed. The MBR membrane material is driven to vibrate through piezoelectric vibration, so that membrane pollution is inhibited, and the water production efficiency and the cleaning efficiency of the membrane are improved.

Disclosed herein is an array of ultrasound devices. Each ultrasound device includes a first piezoelectric stack carried by a membrane and forming, together with the membrane, a first piezoelectric micromachined ultrasonic transducer (PMUT), and a plurality of second piezoelectric stacks carried by the membrane and positioned about a periphery thereof, each second piezoelectric stack forming, together with the membrane, a second PMUT. During operation, the first piezoelectric stack is configured to vibrate the membrane in response to application of an alternating voltage to the first piezoelectric stack to thereby generate at least one outgoing ultrasonic pulse toward a target, and during operation, the plurality of second piezoelectric stacks are configured to generate sense voltages in response to bending thereof induced by vibration of the membrane by incoming ultrasonic reflections off the target.

The present invention provides an actuator capable of suppressing a decrease in the vibration displacement of a piezoelectric element, a liquid discharge head, a liquid discharge device, and a method for manufacturing the actuator. [Solution] The actuator 110 is laminated on a flow channel substrate 100, which is a substrate on which a pressurized liquid chamber 4 is formed, and comprises a vibrating membrane 103 that forms part of the wall surface of the pressurized liquid chamber 4, and a piezoelectric element 5 arranged on the side of the vibrating membrane 103 opposite to the side that forms the wall surface of the pressurized liquid 4. The insulating film 8 that electrically insulates at least the second lead wiring, which is a wiring portion drawn out from the second electrode 53, from the piezoelectric membrane 52 and the first electrode 51 has an insulating film opening 8a, and the central part of the second electrode 51 is an area that is not covered by the insulating film 8.

The present disclosure relates to a loudspeaker, including a plurality of sound-generating units arranged at intervals along a first direction, wherein each of the plurality of sound-generating units vibrates along the first direction; a shell configured to accommodate and support the plurality of sound-generating units, the shell being provided with a plurality of sound outlet holes, the shell and the plurality of sound-generating units form a plurality of acoustic cavities. Each acoustic cavity acoustically is coupled to at least one of the sound outlet holes in the shell. Each of the plurality of sound-generating units includes a vibration diaphragm and a driving structure provided on the vibration diaphragm.

The invention discloses a fixed end beam-cantilever beam type piezoelectric MEMS loudspeaker and a preparation method and application thereof. The piezoelectric MEMS loudspeaker comprises a substrate, an upper electrode, a piezoelectric layer, a lower electrode and a vibrating membrane, the upper electrode, the piezoelectric layer and the lower electrode are sequentially arranged on the substrate, and the vibrating membrane and an etching gap surrounding the vibrating membrane are formed on the upper electrode, the piezoelectric layer and the lower electrode in an etching mode; the vibration displacement of the fixed end beam-cantilever beam type piezoelectric MEMS loudspeaker is very large, and is mainly attributed to the superposition of the vibration displacement of the fixed end beam and the vibration displacement of the cantilever beam.

The present disclosure discloses a speaker box including: a housing and a speaker, including: a frame; a vibration system, including: a diaphragm; and a coil; a magnet system, including: a main yoke; a main magnet; and an elastic support member, including: a bottom wall surrounding the main yoke; and a side wall; a metal mesh cover surrounding the elastic support member and fixedly connected to the frame; an inner chamber is enclosed by the frame, the main yoke, the elastic support member and the diaphragm; a back chamber isolated from the inner chamber is enclosed by the main yoke, the elastic support member, the metal mesh cover and the housing; a plurality of air vents provided on the metal mesh cover is configured to connect the back chamber with the inner chamber. The speaker box in the present disclosure has higher reliability and higher sound quality.

A transducer includes: a film support portion having a hollow portion; a vibration film displaceable in a film thickness direction; a piezoelectric element, the piezoelectric element including a pair of electrodes and a piezoelectric film; and in regions overlapping the hollow portion, a plurality of first regions having a first total film thickness which is a sum of a film thickness of the vibration film and a film thickness of the piezoelectric element, and a plurality of second regions having a second total film thickness which is a sum of a film thickness of the vibration film and a film thickness of the piezoelectric element, the second total film thickness being different from the first total film thickness. The first regions and the second regions are alternately arranged, and one of the first regions is adjacent to a connection portion between the film support portion and the vibration film.

1. The name of the design product: integrated cabinet. 2. The use of the design product: used in the technical field of water treatment equipment, specifically used in the outer cover cabinet of the driving device in the vibrating membrane bioreactor system, integrating display, electrical control, ventilation, protection and other functions. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 front view. 5. Design 1 is designated as the basic design.

A microspeaker includes a frame defining a space; and an actuator positioned within the space, the actuator including a diaphragm configured to vibrate in a first direction during operation. A center axis of the diaphragm extends in the first direction. A plate assembly mechanically couples to the frame and defines a path for venting fluid from the space. The plate assembly includes: a first plate extending in a plane and defining first apertures that are offset from the center axis in the plane; and a second plate defining a second aperture intersected by the center axis. The second plate includes: an inner recessed region abutting the second aperture; and an outer non-recessed region. The first plate is mechanically coupled to the second plate, the first plate and the inner region of the second plate defining a channel that fluidly couples the first apertures to the second aperture.

Aspects of the present disclosure are directed to a speaker system that uses a single driver that results in both force and moment canceling. The speaker system can be mounted within a structure, such as a head mounted display. The speaker system includes a first moving mass, including a sound-producing diaphragm, connected by a primary suspension to a floating basket. The floating basket is both coupled to a second moving mass that controls a voice coil, inducing voice coil movement to produce sound via the diaphragm. A secondary suspension can couple the suspended basket and a fixed frame. The secondary suspension can reduce shaking and contamination generated by the magnet core / motor assembly from seeping into the fixed frame and subsequently to other connected components.

Embodiments herein provide for cooling assemblies provided within a handheld device. In one embodiment, a handheld device comprises a casing, a device package, and a cooling assembly. The casing has an air inlet opening and an air outlet opening disposed therethough. The casing volume is split into a device volume and a cooling volume, the cooling volume separated from the device volume by a dividing surface, and the cooling volume includes the air inlet opening and the air outlet opening. The device package is disposed within the device volume, and the cooling assembly is attached to the casing wall and disposed within the cooling volume. The cooling assembly comprises a vibrational membrane arranged to create a cooling airflow within the cooling volume by drawing air through the air inlet opening.

The present invention specifically relates to a method for preparing a piezoelectric MEMS smart speaker, including: using a theoretical formula for film vibration frequency to preliminarily calculate the film vibration frequency according to a target frequency range; using finite element analysis software to perform simulation and predict the resonance frequency of each vibration membrane to determine the material of each layer; selecting a piezoelectric material; selecting a substrate material; sputtering a first electrode material on the substrate, and etching to form a required electrode pattern; depositing a piezoelectric layer material to ensure uniform thickness; sputtering a second electrode material on the piezoelectric layer, and etching to form a required electrode pattern; testing the actual performance frequency of the speaker; adjusting the thickness or shape of the piezoelectric layer according to the test results; and also including using a dynamic algorithm to adjust the thickness or shape of the piezoelectric layer; re-depositing the piezoelectric layer and adjusting it; until the resonance frequencies of all vibration membranes are within the target range.

A 3D ultrasonic sensor probe, comprising a housing, a vibrating diaphragm, a piezoelectric element, and a plurality of ultrasonic receiving elements. The bottom of the housing is connected to the vibrating diaphragm. The housing is provided with a first through hole and a plurality of second through holes having the same number as that of the ultrasonic receiving elements, the first through hole and the plurality of second through holes all extending in the height direction of the housing. The piezoelectric element is arranged in the first through hole and is fixed to the vibrating diaphragm. The plurality of ultrasonic receiving elements are respectively arranged in the plurality of second through holes on a one-to-one basis and are fixed to the vibrating diaphragm or side walls of the second through holes. The present invention has a simple structure, is easy to manufacture, and has a great ability to identify obstacles.

The invention relates to an MEMS structure forming method and an MEMS structure, and the method comprises the steps: forming a graphical isolation layer on the front surface of a substrate, and enabling the isolation layer to expose a part of the front surface of the substrate; forming a vibration film on the surface of the isolation layer and the exposed part of the front surface of the substrate, the vibration film comprising a support part and a vibration part which are connected, the support part being located on the exposed part of the front surface of the substrate and the side surface of the isolation layer, and the vibration part being located on the top surface of the isolation layer; forming a sacrificial layer on the surface of the vibrating diaphragm; forming a back electrode plate on the sacrificial layer; forming a plurality of mutually independent sound holes in a first preset area of the back polar plate, wherein the sound holes penetrate through the back polar plate and expose the sacrificial layer; forming an opening from one side of the back surface of the substrate, the opening corresponding to the isolation layer up and down and penetrating through the substrate to expose the isolation layer; and taking the sound hole and the opening as release windows, and simultaneously removing the isolation layer and the sacrificial layer between the vibration part and the back polar plate. According to the invention, collapse of the MEMS structure can be avoided, and the MEMS structure has good performance.

The utility model discloses a modal shape demonstration device based on thin wall board vibration is constituted by the excited vibration thin wall board, support connecting piece, loudspeaker, cross support, fine sand recovery device and base, and the base is hollow cube structure, is provided with cross support at the top of base, is provided with loudspeaker support above cross support, and the upper surface of loudspeaker support is fixed loudspeaker, the bottom of support connecting piece is fixed on the diaphragm of loudspeaker, and the top is fixed with magnet A, and the excited vibration thin wall board is placed on magnet A, and magnet B is arranged on the upper surface of excited vibration thin wall board, and magnet A and magnet B are attracted to each other and realize the fixation to excited vibration thin wall board, and fine sand recovery device is composed of funnel structure and drawer, and the bottom of funnel structure is set up above cross support, and loudspeaker support, loudspeaker, support connecting piece, excited vibration thin wall board are surrounded, and the lower part of base is provided with drawer, and the back of base is equipped with power amplifier module.

The present invention provides a speaker including a frame, a vibration system, and a magnetic circuit system. The vibration system includes a diaphragm, a voice coil, and a supporting member. The diaphragm includes a first suspension, a second suspension, and a dome. The dome includes a main portion, a first extension portion bending and extending from an inner periphery of the main portion in a direction close to the supporting member, and a second extension portion bending and extending from the first extension portion in the direction close to the first suspension. An outer periphery of the main portion and the second extension portion are fixed to the supporting member, and the outer periphery of the first suspension is fixed to the second extension portion. The speaker of the present invention has a better reliability and a higher stability of acoustic performance.

The utility model relates to an engine active suspension which comprises a connecting shaft, a connecting shell, an upper shell and a lower shell, a rubber main spring is connected between the connecting shell and the upper shell in a vulcanization mode, a channel support is further installed in the upper shell, a vibrating diaphragm is installed in the middle of the channel support and comprises a rubber diaphragm on the edge and a decoupling disc in the center, and the rubber diaphragm is connected with the lower shell in a vulcanization mode. The bottom of the decoupling disc is provided with an actuator in a threaded mode, a shaping ring is further arranged at the connecting position of the rubber membrane and the decoupling disc, and a plurality of limiting structures are arranged on the upper portion and the lower portion of the shaping ring correspondingly. The sliding block can be limited to only slide up and down through the vertical shaft, and the sliding block is connected with the shaping ring in the vibrating membrane through the connecting rod; therefore, the vibrating diaphragm can be limited to only generate longitudinal wave vibration up and down, the actuator can be ensured to stably generate action cooperation, the influence on the actuator can be reduced, and the service life is prolonged.

The present disclosure provides a stator blade, a noise reduction method of an open rotor engine, and an open rotor engine. The stator blade is arranged at the axial rear side of the rotor blade of the open rotor engine. The surface of the stator blade is provided with a vibrating membrane. The vibrating membrane is arranged on the surface of the region where the airflow generated by the rotation of the rotor blade interacts with the stator blade, and the vibrating membrane can vibrate along the normal direction. The amplitude of the vibrating membrane is arranged to attenuate the airflow generated by the rotation of the rotor blade.

The utility model discloses a sound fish luring device capable of being used in deep water. The device comprises a floating body, a hydrophone and a low-frequency transmitting transducer, wherein the hydrophone and the low-frequency transmitting transducer are connected with the floating body through cables; a power supply, a memory and the like are arranged in the floating body. The hydrophone collects fish ingestion sound and stores the fish ingestion sound in the memory, and the fish ingestion sound is transmitted out by the low-frequency transmitting transducer to lure fish after being processed by the signal output module and the power amplifier. The low-frequency transmitting transducer is provided with a shell, a telescopic air bag and a vibrating membrane; the air bag and the vibration cabin balance internal pressure and external pressure through an air guide pipe, a copper coil is wound outside a vibration membrane extension cavity and matched with a permanent magnet to generate a magnetic field to enable the vibration membrane to produce sound, and the frequency band of 10 Hz to 3 kHz can be covered. The device has a recording mode and a playing mode, is connected and controlled through mobile phone APP Bluetooth, can accurately trap different fishes, improves the fishery yield, has automatic pressure compensation to adapt to deep water, realizes small size and low cost through a single array element, has the sounding frequency far better than that of a traditional underwater horn, and has remarkable advantages.

Provided is a mounting component held so as to be capable of attachment and detachment by a mounting machine. The mounting component includes a membrane support, a vibrating membrane connected to the membrane support and displaceable in a membrane thickness direction, and a contact member that is located on the membrane support and is subjected to an upward attractive force by the mounting machine without generating stress leading to shape deformation or breakage of the vibrating membrane during the attachment and detachment.

A liquid discharge head includes a common liquid chamber having multiple liquid chambers communicating with each other through the common liquid chamber, a vibration film having multiple nozzles, multiple vibration generators, and a flexible member. The common liquid chamber stores a liquid. The multiple nozzles respectively communicate with the multiple liquid chambers. The multiple vibration generators individually vibrate the vibration film around the multiple nozzles, respectively. The flexible member is opposed to the multiple nozzles in the common liquid chamber. The flexible member is deformable by the liquid in the common liquid chamber vibrated by the vibration film.