37results about "Diaphragm materials" patented technology

The present invention relates to the technical field of acoustic-electric conversion, and provides a piezoelectric MEMS microphone, including: a base with a cavity back and a piezoelectric diaphragm, the piezoelectric diaphragm includes a suspension part and a base fixing part connected to the base, The piezoelectric diaphragm also includes a support part connecting the fixed part of the base and the suspension part, and the suspension part is suspended above the back cavity through the support part. The piezoelectric MEMS microphone also includes a limit structure, and the suspension part includes a position-limiting structure. The middle film overlaps with the projection range along the vibration direction, and the limiting structure and the middle film form a fixed structure of the piezoelectric diaphragm. After the piezoelectric diaphragm is released from the oxide layer, under the action of the residual stress in the piezoelectric diaphragm, the middle film deforms upwards or downwards and connects with the corresponding limiting structure to completely release the stress and gradient stress. The application of the technical solution solves the technical problem in the prior art that the diaphragm is deformed due to uneven stress distribution in the process of processing, which further affects the consistency of performance such as the sensitivity of the microphone.

A sound apparatus comprises a plurality of vibration devices and a vibration member including a same main surface connected to the plurality of vibration devices, the plurality of vibration devices include a first vibration device and a second vibration device, which transfer vibrations having different phases each other to the vibration member.

An object of the present invention is to provide a waterproof speaker with a waterproof rating of 8 or above, which can provide a waterproof function under high water pressure. The present invention provides a high water pressure waterproof loudspeaker, which has a frame and a vibrating part inside the frame. a diaphragm inside the frame; and a waterproof ring placed on a side wall of the frame and configured to protrude outwardly from the flange portion of the frame.

The display device comprises: a display panel; a sound generator under the display panel; a frame disposed under the display panel and the sound generator; and a porous layer disposed adjacent to the sound generator between the display panel and the frame and having a plurality of air pockets, wherein the porous layer has a porosity of about 90% or more.

The invention provides a preparation method and device for an electrostatic speaker diaphragm, which relates to the technical field of electronic equipment, including: sequentially covering graphene and P solution on copper foil to obtain a target whose surface is covered with graphene film and P film Copper foil; perform etching treatment and initial surface treatment on the target copper foil in sequence to obtain the initial speaker diaphragm; perform square resistance surface treatment on the initial speaker diaphragm to obtain the target speaker diaphragm; place the target speaker diaphragm on the first preset In the environment, the target speaker diaphragm is polarized to obtain the electrostatic speaker diaphragm, which solves the technical problems of edge vibration distortion and phase lag of the electrostatic speaker diaphragm in the prior art.

The invention discloses a sounder and an electronic product including the sounder, comprising: a housing; a magnetic circuit system located in the housing; the magnetic circuit system includes a side magnetic part and a central magnetic part; the central magnetic part includes a Support plate; and two central magnets located on both sides of the support plate; the central magnetic part is a central hollow structure; two sets of vibration components are located on both sides of the support plate, each set of vibration components includes a diaphragm and a voice coil; sound The device also includes a centering structure located on the inner side of the central hollow edge of the central magnetic part. The centering structure includes two ring skeletons respectively connected and fixed on the central parts of the two diaphragms. The adjacent ends of the two ring skeletons are connected and fixed with elastic supports. The outer edge of the elastic support is connected and fixed on the central magnetic part of the hollow edge. The invention can reduce the polarization generated when the double-diaphragm vibrates in the two-way sounder structure, reduce product distortion, and improve product performance and stability.

A dynamic loudspeaker driver comprising a magnet-system; a membrane; the membrane being movably mounted with respect to the magnet-system; at least one voice coil attached to the membrane and operatively coupled with the magnet-system, wherein the voice coil comprises an upper edge facing the membrane and a lower edge being arranged opposite the upper edge of the voice coil; at least one voice coil extension element comprising an upper surface facing the membrane and a lower surface facing the upper edge of the voice coil, wherein the lower surface of the voice coil extension element is attached the upper edge of the voice coil while the upper surface of the voice coil extension element is attached to the membrane.

The invention relates to a vibration device and equipment comprising the same. A vibration device includes a vibration portion, a first electrode portion disposed at a first surface of the vibration portion, and a second electrode portion disposed at a second surface of the vibration portion, where the first electrode portion and the second electrode portion include at least one of conductive metal particles and carbon particles.

A dipole loudspeaker for producing sound at bass frequencies. The dipole loudspeaker includes: a diaphragm having a first radiating surface and a second radiating surface, wherein the first radiating surface and the second radiating surface are located on opposite faces of the diaphragm; a drive unit configured to move the diaphragm at bass frequencies such that the first and second radiating surfaces produce sound at bass frequencies, wherein the sound produced by the first radiating surface is in antiphase with sound produced by the second radiating surface; a frame, wherein the diaphragm is suspended from the frame via one or more suspension elements, wherein the frame is configured to allow sound produced by the first radiating surface to propagate out from a first side of the dipole loudspeaker and to allow sound produced by the second radiating surface to propagate out from a second side of the dipole loudspeaker. The diaphragm includes a region of porous material having a specific airflow resistance in the range 5-5000 Pa·s / m, wherein the diaphragm is configured to permit airflow through at least part of said region of porous material from the first radiating surface of the diaphragm to the second radiating surface of the diaphragm.