96 results about "Vibrating membrane" patented technology

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.

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.

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.

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 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 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.

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.

A high-acoustic-resistance piston motion loudspeaker disclosed in the present disclosure belongs to the field of sound-electricity conversion. The loudspeaker includes a substrate, a driving assembly, a vibrating diaphragm, a connecting assembly and a vibration cavity. The connecting assembly is not coplanar with the vibrating diaphragm, which is of a concealed connecting structure. The driving assembly is configured to drive the vibrating diaphragm to generate a piston motion. The vibrating diaphragm is located in the vibration cavity, and a displacement range of the vibrating diaphragm in a perpendicular direction is within a height range of the vibration cavity formed by a supporting structure extending in a thickness direction of a base, so as to achieve purposes of reducing air leakage and improving a sound pressure level in a working process of the loudspeaker.

The present application relates to the technical field of piezoelectric thin film material, and particularly relates to a piezoelectric thin film nozzle suitable for a micro-electro-mechanical system and a preparation method thereof. The nozzle comprises a silicon substrate, a composite vibrating membrane layer, a lower electrode, a gradient lanthanum-doped lead zirconate titanate piezoelectric thin film and a ring-shaped upper electrode. The piezoelectric thin film is sequentially provided with a lanthanum-rich bottom layer, a lanthanum-transition middle layer and a lanthanum-depleted surface layer along the thickness direction. Through gradient doping, layered atmosphere heat treatment and full-film three-stage gradient crystallization annealing, residual stress is effectively released, warping deformation and micro-crack propagation are inhibited, and the piezoelectric coefficient is improved. The design of the ring-shaped upper electrode and the center reserved spray hole can stably convert the low stress advantage of the material level into the improvement of the liquid droplet spraying direction precision, volume consistency and long-term stability, thereby solving the problem that the piezoelectric thin film is prone to warping and cracking, and the spraying precision and reliability are difficult to be considered in the prior art.

An audio transducer assembly and an apparatus incorporating the same are disclosed. The assembly includes an audio transducer, comprising a diaphragm and a transducing mechanism, which is substantially encapsulated by a metallic enclosure. The enclosure is an integrally formed unit that provides structural reinforcement to a host apparatus, such as a slender housing of a wearable device. To ensure a durable interface, the enclosure may feature a profiled edge region that facilitates a stress-reducing junction with the housing. In some embodiments, the transducer is an armature-type transducer where the diaphragm is rigidly coupled to a pivoting armature. Apertures in the enclosure provide an acoustic pathway from the diaphragm to an exterior of the housing, allowing the assembly to function as a loudspeaker or a microphone.

The invention relates to a listening device (1) configured to generate and transmit sound frequencies to a user by bone conduction, and comprising a main body (2) defining an internal volume (6), at least one electroacoustic transducer (7) configured to generate vibrations of varying frequencies and intensities, a control unit (CU) configured to control the operation of the listening device, a vibrating diaphragm (8), and a receiving element (9) configured to be in contact with the user. The receiving element (9) comprises a plurality of support members (10) including an upper end portion (11) configured to be in contact with the user, and a lower end portion (12) extending substantially opposite the vibrating diaphragm (8).Each support member (10) is movable between a rest position and an operating position in which the lower end portion (12) of the support member (10) is in contact with the vibrating membrane (8). Figure 1.

The piezoelectric driving silicon-based micro-electro-mechanical resonator with the high quality factor comprises a substrate silicon layer with a cavity and a vibrating membrane layer which is arranged on the substrate silicon layer and covers the cavity, and the vibrating membrane layer sequentially comprises a bottom electrode layer, a piezoelectric layer and a top electrode layer from bottom to top. The bottom electrode layer sequentially comprises a device silicon layer, a dielectric layer and a first metal layer from bottom to top, the dielectric layer covers part of the device silicon layer, the first metal layer at least covers part of the dielectric layer, and the first metal layer at least partially extends to the outer side of the dielectric layer and covers at least part of the device silicon layer; according to the piezoelectric driving silicon-based micro-electro-mechanical resonator, the dielectric layer is covered by the first metal layer, and the dielectric layer is wrapped or half wrapped by the first metal layer, so that the piezoelectric driving silicon-based micro-electro-mechanical resonator obtains a high quality factor Q value and low electrical loss, namely low series resonance impedance, in a full-temperature range.

Provides are an ultrasonic transducer, a fabrication method thereof and an electronic device. The ultrasonic transducer includes: an array substrate having a groove, a bottom electrode and an insulation layer, wherein an orthographic projection of the groove on the array substrate is within an orthographic projection of the bottom electrode on the array substrate, and the insulation layer covers the bottom electrode; and an opposite substrate, the opposite substrate and the array substrate are oppositely arranged and are attached to each other, the opposite substrate and the array substrate form a cavity in the groove, the opposite substrate has a top electrode and a vibrating diaphragm layer which are arranged in stack, and an orthographic projection of the top electrode on the array substrate is within the orthographic projection of the bottom electrode on the array substrate.

The invention discloses a compound control full-frequency-domain moving iron driving unit which comprises a shell, a sound outlet nozzle, a vibration system, a magnetic circuit system and an electric connection assembly. The vibrating system is composed of a vibrating diaphragm support, a low and medium frequency vibrating diaphragm, a high frequency vibrating diaphragm, a first driving rod and a second driving rod, and the two groups of vibrating diaphragms are installed on the vibrating diaphragm support side by side and respond to signals of different frequency bands respectively. The magnetic circuit system comprises a balanced armature, a coil, a magnet and a magnet yoke, and the coil generates an alternating magnetic field after being electrified and interacts with a constant magnetic field of the magnet, so that the balanced armature swings around a balance point. And the mechanical displacement of the armature is simultaneously transmitted to the low and medium frequency vibrating diaphragm and the high frequency vibrating diaphragm through the two driving rods, so that collaborative sound production of different frequency bands is realized. The structure realizes full-frequency-domain output of 20 Hz-20 KHz in a single moving iron unit, and has the advantages of compact structure, high energy utilization rate and balanced tone quality.

A fluid pump system (200) for generating sound waves in the audible wavelength spectrum, comprising one or more chip frames (220), a substrate (206), and at least two vibrating membranes (202) which have a resting state and can be deflected into a first deflection state (224) or a second deflection state (226) upon actuation. The at least two vibrating membranes (202) are connected to the chip frame(s) (220) and arranged in series on the substrate (206), with a spatially defined volume (208) formed between the substrate (206) and each of the at least two vibrating membranes (202). The chip frame (220) has at least one connection area (230) for attaching the at least two vibrating membranes (202).The connection area (230) is designed to connect the at least two vibrating membranes (202) either transversely or longitudinally to the pumping direction (212) of a fluid in the fluid pumping system (200).

The invention provides an ultrasonic sensor and a preparation method thereof, an underwater ultrasonic detection system and an application method, a single-mode fiber-multimode fiber-grapefruit type photonic crystal fiber cascade structure is adopted, a PDMS elastomer is locally filled in a photonic crystal fiber, a built-in solid-gas Fabry-Perot interference cavity is formed, an external vibrating membrane is not needed, and the ultrasonic sensor is simple in structure and convenient to operate. Therefore, the structure is simplified, and the manufacturing cost is reduced. By optimizing welding parameters and a PDMS filling and curing process, stable and efficient preparation of the sensor is realized. The design enables the sensor to have high sensitivity and broadband ultrasonic response capability, and PDMS built-in packaging improves environmental durability and measurement stability. The all-fiber passive sensing mode has the advantages of electromagnetic interference resistance, miniaturization and narrow space measurement adaptation, the system is easy and convenient to build, and the system is suitable for ultrasonic detection under complex environments such as underwater and high-temperature environments.

The invention provides a piezoelectric actuator structure, an MEMS component and a liquid ejection head. The piezoelectric actuator structure comprises a vibrating membrane layer, a lower electrode layer, a piezoelectric material layer and an upper electrode layer which are sequentially stacked from bottom to top. The lower electrode layer covers the vibrating membrane layer; the piezoelectric actuator structure further comprises a dielectric material layer which covers the exposed area of the lower electrode layer and the exposed area of the piezoelectric material layer. The dielectric material layer partially covers the upper electrode layer so that the upper electrode layer is partially exposed. According to the invention, the resistance of the common ground electrode of the piezoelectric actuator structure is reduced, and the heating of the piezoelectric actuator structure is effectively reduced; the vibrating membrane layer is reinforced through the dielectric material layer, so that the vibration frequency of the piezoelectric actuator structure is effectively improved, and the production efficiency is improved; as the dielectric material layer comprehensively shields the exposed area of the piezoelectric material layer, erosion of water vapor in the atmosphere to the piezoelectric material is avoided, the service life of the piezoelectric actuator is prolonged, and the reliability of the piezoelectric actuator is improved.

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; a vibration film that is connected to the film support portion and capable of displacing in a thickness direction; a base material having an opposed surface that is opposed to the vibration film; and a first piezoelectric element that is provided with a pair of electrodes and a piezoelectric film sandwiched between the pair of electrodes, and is arranged on the vibration film, in which the transducer maintains a pressure in a space between the base material and the vibration film so as to keep displacement of the vibration film within a certain range.

The application relates to the technical field of loudspeaking equipment, and discloses a hanging ear type composite conduction earphone, which comprises a shell, an opening for mounting a vibrating diaphragm, a closed vibrating cavity formed by the shell and the vibrating diaphragm, a substrate installed in the vibrating cavity, a power supply electrically connected to the substrate, a coil fixed on the substrate and electrically connected to the substrate, and a magnet provided with a recessed cavity, wherein the coil can extend into the recessed cavity, and the magnet is fixedly connected to the inner wall of the vibrating cavity through a connecting sheet. The earphone can solve the problem of high cost of the prior art earphone.

The invention relates to a suspension device (1) for a loudspeaker comprising: - an outer edge (2); - an inner edge (3); - a suspension (4) extending between the outer and inner edges; the suspension being able to absorb movement stresses produced on the inner edge by means of a predetermined deformation of the suspension. According to the invention, the suspension comprises at least three distinct portions: a rotating mass (7); a first lip (8) attached to the end of the inner edge; and a second lip (9) attached to the end of the outer edge; the first lip and the second lip also being connected to the rotating mass such that the pistonic movements of the diaphragm cause the rotating mass of the suspension to rotate.

The invention provides a one-way flow driver. The one-way flow driver comprises a packaging shell and a vibration unit. A first opening and a second opening are formed in the packaging shell in a penetrating mode, and the first opening and the second opening are located in different faces of the packaging shell respectively and communicate with each other through a cavity so that fluid can flow in from one of the first opening and the second opening and flow out from the other one of the first opening and the second opening; the vibration unit comprises a fixed part fixed in the packaging shell and a vibration membrane fixed on the fixed part; a resonant cavity is defined by the vibrating diaphragm, the fixing part and the packaging shell together. The vibrating diaphragm is provided with a third opening penetrating through the vibrating diaphragm along the vibrating direction of the vibrating diaphragm; the first opening and the third opening are oppositely arranged at an interval, and the first opening and the third opening are at least partially overlapped in the vibration direction of the vibration membrane; when the vibrating diaphragm vibrates, out-of-plane vibration is generated and the volume of the resonant cavity is changed. According to the one-way flow driver, the high-flow one-way flow function can be achieved, and the long-term working reliability is greatly improved.

A piezoelectric material composite membrane acoustic component with broadband and high sound quality includes a vibrating membrane which is an electrically conductive membrane, a supporting frame having a hollow portion penetrating the supporting frame, a piezoelectric plat set including a first-piezoelectric-plate and a second-piezoelectric-plate formed on and electrically connected to the first-piezoelectric-plate and an AC power source. A fixing portion of the vibrating membrane is fixed by the supporting frame. Each of the first-piezoelectric-plate and the second-piezoelectric-plate includes a top-electrode-layer, a piezoelectric-layer and a bottom-electrode-layer. The bottom-electrode-layer of the first-piezoelectric-plate is fixed on and electrically connected to a piezoelectric-plate fixing portion of the vibrating membrane. A spacing portion of the vibrating membrane is between the fixing portion and the piezoelectric-plate fixing portion. The AC power source includes a first electrode and a second electrode electrically connected to the top-electrode-layer of the first-piezoelectric-plate and the vibrating membrane, respectively.

A sound assembly includes a carrier, a first electrode structure, a second electrode structure, and a vibration diaphragm. The first electrode structure is arranged on one side of the carrier. The second electrode structure is arranged facing and insulated from the first electrode structure. The vibration diaphragm is arranged on one side of the second electrode structure that faces away from the first electrode structure. The first electrode structure and the second electrode structure are configured to cooperate with each other to provide a first force that acts on a first end of the vibration diaphragm and a second force that acts on a second end of the vibration diaphragm. Magnitudes and / or acting directions of the first force and the second force are different.

The invention discloses a piezoelectric micromechanical ultrasonic transducer array and a manufacturing method thereof and electronic equipment, the piezoelectric micromechanical ultrasonic transducer array comprises a substrate, a film layer and a plurality of cavities arranged on the substrate, the film layer comprises a vibrating film layer and a fixed film layer, release channels are arranged on the cavities of the substrate, the vibrating film layer covering the cavities is arranged on the upper portion of the cavities of the substrate, and the fixed film layer is arranged on the lower portion of the substrate. A fixed film layer is arranged on the upper portion of the non-cavity area of the substrate, the depth of each cavity is smaller than or equal to 1.2 m, and the distance between every two adjacent cavities is smaller than or equal to 5 m; the center frequency of ultrasonic signals of the piezoelectric micromechanical ultrasonic transducer array is larger than or equal to 5 MHz. According to the structure, the area proportion of the vibrating membrane layer in the piezoelectric micromechanical ultrasonic transducer array is improved, and the performance indexes such as the emission sound pressure and the bandwidth of the piezoelectric micromechanical ultrasonic transducer are improved.

The invention discloses an integrated MEMS acoustic device which comprises an MEMS loudspeaker and an MEMS microphone, and the MEMS loudspeaker and the MEMS microphone are fixedly and integrally connected and installed in an earphone loudspeaker ring. The MEMS loudspeaker is of a capacitive or piezoelectric driving structure, and sound waves are generated through a vibrating diaphragm; the MEMS microphone is of a capacitive pickup structure and picks up sound waves through another independent or shared diaphragm. Compared with the prior art, the earphone has the advantages that the structure is simplified, the loudspeaker and the microphone are integrated in the same device, the number of independent devices is reduced, and the internal structure layout of the earphone is optimized; the microphone is not located in the front end channel of the loudspeaker any more, so that the sound transmission is prevented from being blocked, and the sound quality performance is improved; compared with a traditional moving coil loudspeaker and independent microphone scheme, the overall size is remarkably reduced, and more space is released for the interior of the earphone; the saved space can be used for increasing the battery capacity and improving the cruising ability of the earphone; the manufacturing cost is reduced; and the production process is simplified.

The utility model belongs to the technical field of earphones, and particularly discloses an earphone head with a damage-reducing and efficiency-improving dangling edge structure and a bone conduction earphone with the earphone head. The earphone head comprises a machine body, a vibration output end of the machine body is provided with a soft rubber vibration diaphragm, a vibrator is arranged in the machine body, a vibration sheet of the vibrator is arranged towards one side of a vibration hole of the machine body, a hard rubber sheet is fixed on the vibration sheet, and the soft rubber vibration diaphragm is fixedly sleeved on the hard rubber sheet. Concave-convex structures are arranged on the inner surface and the outer surface of the soft rubber vibrating diaphragm to form dangling edges with wave-shaped sections, and the dangling edges are located in the vibrating hole and arranged in a circle around the hard rubber sheet. The earphone head not only can reduce the energy loss in the vibration process and improve the vibration transmission efficiency so as to reduce the sound wave conduction loss and improve the sound wave conduction efficiency, but also can disperse the vibration energy and improve the wearing comfort and the sound quality. The bone conduction earphone comprises the earphone head, and the earphone head enables the whole bone conduction earphone to realize high-efficiency sound wave conduction, and the bone conduction earphone is comfortable to wear and good in sound quality.

The utility model relates to the technical field of vibrating diaphragms, and relates to a vibrating diaphragm and a loudspeaker. The diaphragm includes: a diaphragm body including an outer edge and an inner edge; the reinforcing rib is arranged on one side face of the film body and comprises at least one first reinforcing piece and at least two second reinforcing pieces, the first reinforcing pieces are arranged in the direction of the outer edge and / or the inner edge of the film body, and the second reinforcing pieces and the first reinforcing pieces are arranged in a crossed mode and form a containing cavity; and the filling layer is arranged on the side surface of the film main body and is filled in the accommodating cavity between the first reinforcing piece and the second reinforcing piece. According to the embodiment, the filling layers are arranged on the back surface of the diaphragm main body and are respectively filled among the reinforcing ribs, and the strength of the vibrating diaphragm is effectively improved through the filling layers, so that the segmentation vibration of the vibrating diaphragm is effectively inhibited, the distortion of a loudspeaker is reduced, the weight of the vibrating diaphragm is reduced while the strength is improved, and the specific modulus of the vibrating diaphragm is improved. And the bearing power of the loudspeaker is improved.