34results about "Diaphragm materials" patented technology

The invention discloses a sounder and an electronic product comprising the sounder. The sounder comprises a shell; a magnetic circuit system positioned in the shell; wherein the magnetic circuit system comprises a side magnetic part and a central magnetic part; the central magnetic part comprises a support plate located in the middle. The sounder also comprises two central magnets positioned on two sides of the supporting plate. Central magnetic parts are of central hollow structures. The sounder also comprises two groups of vibration assemblies positioned on two sides of the support plate; each group of vibration assembly comprises a vibrating diaphragm and a voice coil; the sounder further comprises a centering structure located on the inner side of the central hollowed-out edge of thecentral magnetic part, the centering structure comprises two annular frameworks which are fixedly connected to the central parts of the two vibrating diaphragms, the adjacent ends of the two annular frameworks are fixedly connected with elastic supporting pieces, and the outer side edges of the elastic supporting pieces are fixedly connected to the central magnetic part of the hollowed-out edge. Polarization generated when double vibrating diaphragms in the bidirectional sounder structure vibrate can be reduced, product distortion is reduced, and product performance and stability are improved.

The invention provides a net charge generating device and an electron generator used for the net charge generating device, and also provides a vibrating diaphragm used in an electrostatic loudspeaker.In the prior art, electrostatic charges required by a vibrating diaphragm of an electrostatic loudspeaker are injected through a high-voltage direct-current power supply, and the high-voltage direct-current power supply is large in size, so that the electrostatic loudspeaker is not suitable for being used on portable electronic equipment, which is a defect of the electrostatic loudspeaker. The invention provides a net charge generation device to replace a high-voltage direct-current power supply in an electrostatic loudspeaker in the prior art. The net charge generating device is simple in structure and convenient to miniaturize, so that the size of the electrostatic loudspeaker designed by the net charge generating device is greatly reduced, and the using requirements of miniaturization,lightness and thinness of the electrostatic loudspeaker in mobile portable equipment can be met.

The invention discloses a drum paper assembling method. The drum paper assembling method comprises the following steps that S1, a vibration ring material is cut into an annular body, and an annular material is obtained; s2, pasting the annular material to the outer edge of a drum paper carcass to obtain a combined body; s3, positioning the assembly by using the center of the drum paper carcass, and forming the annular material of the assembly to obtain a semi-finished product; and S4, the edge of the semi-finished product is punched, and a finished product is obtained. According to the drum paper assembling method, the carcass can be grabbed for forming, damage to the vibrating ring is avoided, the production progress and the machining precision are guaranteed, and the product yield is increased.

A method, system and devices to selectively control modal vibrations in an elastic panel with a number of force actuators distributed throughout the surface of the elastic panel to excite/depress the response of one or more vibrational resonant modes included in a prescribed subset. The force actuators are disposed such that prescribed modal excitation/depression may be realized when the actuators are driven by a common source signal.

A sound control system comprises a sound generating device disposed at a vehicle ceiling corresponding to a seat region of the vehicle and disposed at a sound space formed within the vehicle to correspond to the seat region, and a sound processing circuit for providing a vibration driving signal to the sound generating device, the sound generating device vibrates based on the vibration driving signal to vibrate a vibration region of the vehicle ceiling corresponding to the sound space to provide a sound to the sound space.

The invention discloses a drum paper carcass production method. The drum paper carcass production method comprises the following steps: S1, mixing a fiber material with water, and crushing the fiber material to form fiber slurry; s2, the fiber slurry is quantitatively taken out and formed, and an initial pressing piece is formed; s3, the initial pressing piece is soaked in pigment liquid for second preset time, and the initial pressing piece with pigment is formed; s4, water of the initial pressing piece with the pigment is pumped out, and a semi-finished product is formed; and S5, the semi-finished product is subjected to hot press molding, and a primary finished product is formed. According to the drum paper carcass production method, materials can be continuously supplied, pigments and chemical agents do not need to be added, the drum paper carcass production method is environmentally friendly, the water treatment cost and the cost of water resources and fiber material resources are greatly saved, the concentration of fiber pulp in each batch is consistent, and the consistency and the yield of products are guaranteed.

A loudspeaker for producing sound at bass frequencies including: a diaphragm; a frame, wherein a proximal end of the diaphragm is suspended from the frame by at least one proximal suspension element, wherein the at least one proximal suspension element is configured to substantially prevent translational movement of the proximal end of the diaphragm relative to the frame, whilst permitting translational movement of a distal end of the diaphragm which is opposite to the proximal end of the diaphragm; a drive unit configured to move the distal end of the diaphragm based on an electrical signal.

The invention discloses a sensitive film, an MEMS microphone and a manufacturing method thereof, and the sensitive film comprises: a sensing part which is used for sensing a vibration signal; a connecting part which is arranged around the sensing part and is used for fixing the sensing part; an action part which is connected with the sensing part and the connecting part, wherein the rigidity of the action part is smaller than that of the sensing part and/or that of the connecting part; and a reinforcing part, wherein the reinforcing part is arranged on the action part. According to the technical scheme, the structural strength of the sensitive film is improved, and the probability that the sensitive film is broken and fails is reduced.

The invention relates to the technical field of acoustoelectric conversion and provides a piezoelectric MEMS microphone. The piezoelectric MEMS microphone comprises a substrate with a back cavity anda piezoelectric vibrating diaphragm, the piezoelectric vibrating diaphragm comprises a suspension part and a substrate fixing part connected with the substrate; the piezoelectric vibrating diaphragm further comprises a supporting part connected with the substrate fixing part and the suspension part, the suspension part is suspended above the back cavity through the supporting part; the piezoelectric MEMS microphone further comprises a limiting structure, the suspension part comprises a middle film overlapped with the projection range of the limiting structure in the vibration direction, and the limiting structure and the middle film form a fixing structure of the piezoelectric vibrating diaphragm. After the oxide layer of the piezoelectric vibrating diaphragm is released, the middle diaphragm deforms upwards or downwards under the action of residual stress in the piezoelectric vibrating diaphragm and is connected with the corresponding limiting structure so as to completely release stress and gradient stress. By applying the technical scheme, the technical problem that in the prior art, due to uneven stress distribution in the machining process, deformation of the diaphragm is notuniform, and then consistency of performance such as sensitivity of the microphone is affected is solved.

The invention provides a frequency response adjustable miniature sound pressure amplification structure which comprises a shell (1), a plurality of primary sensitive membranes (2), a plurality of connecting rods (3), a plurality of secondary sensitive membranes (4) and a terminal sensitive membrane (5), and the shell is of a rigid structure and comprises two cavity structures; the plurality of primary sensitive membranes are used as receiving ends of sound pressure signals and are fixed on the upper surface frame of the shell (1) to form a first boundary condition of peripheral fixed support; the plurality of connecting rods are respectively connected with the centers of the plurality of primary sensitive membranes and the plurality of secondary sensitive membranes, so that the primary sensitive membranes and the secondary sensitive membranes move together under the action of sound pressure; the plurality of primary sensitive membranes, the plurality of secondary sensitive membranes and the shell jointly form a first sealing cavity; a plurality of secondary sensitive membranes are fixed on the frame in the shell to form the second boundary condition of the peripheral fixed support, and form the second sealing cavity with the terminal sensitive membrane and the shell; and the terminal sensitive membranes serving as the amplification end of thea sound pressure signal is fixed on the lower surface of the shell to form a third boundary condition of the peripheral fixed support.

A vibration device can include a vibration portion; a first electrode portion disposed on a first surface of the vibration portion; and a second electrode portion disposed on a second surface of the vibration portion, in which each of the first and second electrode portions include at least one of a conductive metal particle and a carbon particle.

The invention discloses a drum paper carcass production device. The drum paper carcass production device comprises a pulping mechanism, a feeding mechanism, a pumping mechanism and a forming mechanism, the pulping mechanism comprises a pulping container, and the pulping container is used for mixing fiber materials and water and beating the mixture into fiber pulp; the feeding mechanism comprises a feeding container and a supplementing container, the feeding container is used for quantitatively providing a first volume of fiber slurry, and the supplementing container is used for quantitatively supplementing the first volume of fiber slurry to the feeding container; the material pumping mechanism is communicated with the material supply container and is used for quantitatively pumping the fiber slurry from the material supply container; the forming mechanism comprises an initial pressing component, a coloring container, a displacement assembly and a pressing assembly. According to the drum paper carcass production device, continuous feeding can be achieved, and the production efficiency is greatly improved; pigment and chemical agents do not need to be added in the early stage, no wastewater is discharged, environment friendliness is achieved, and the water treatment cost and the water resource cost are greatly saved; and the concentration of each batch of fiber pulp is consistent, so that the consistency and yield of products are ensured.

The invention discloses a dustproof cap-support chip integrated loudspeaker. The loudspeaker comprises a basin stand, a magnetic circuit system arranged at the center of the basin stand and a vibration system located at the periphery of the magnetic circuit system, wherein the vibration system comprises a sound cone and a voice coil; the outer side of the sound cone is fixed with the basin stand through a folding ring. The center of the sound cone is provided with a through hole, wherein the through hole is fixed with the voice coil, the voice coil is arranged at the periphery of the magneticcircuit system, the voice coil is connected with a support chip, the other end of the support chip is fixed on the magnetic circuit system, the magnetic circuit system sequentially comprises a magnetic sheet, magnetic steel and a magnetic bowl from top to bottom, and the magnetic bowl is arranged inside the basin stand. The loudspeaker has the beneficial effects that the support chip is designed above the voice coil and the magnetic circuit, and the characteristics of high power, low distortion and good stability are realized on the premise that the loudspeaker is ultrathin.

The microphone comprises a substrate, a first sacrificial layer, a lower back polar plate, a second sacrificial layer, a vibrating diaphragm, a third sacrificial layer and an upper back polar plate which are sequentially stacked from bottom to top, the first conductive channel downwards penetrates through the second sacrificial layer from the surface of the second sacrificial layer to the lower back electrode plate; the second conductive channel penetrates through the third sacrificial layer and is connected with the first conductive channel; the first electrode and the third electrode are isolated from each other and located on the upper back pole plate, the first electrode is electrically connected with the lower back pole plate through the second conductive channel and the first conductive channel, and the third electrode is electrically connected with the upper back pole plate. According to the microphone with the double back polar plates, the electrode on the lower back polar plate and the electrode of the vibrating diaphragm are connected to the upper back polar plate when the vibrating diaphragm and the upper back polar plate layer are deposited, so that the adhesive force between the conductive channel and the lower back polar plate and the vibrating diaphragm is improved, and the yield and the reliability of a device are improved.

The invention discloses a drum paper carcass forming device. The drum paper carcass forming device comprises a forming mechanism and a forming mechanism, wherein the forming mechanism is used for receiving fiber pulp and forming the fiber pulp into an initial pressing piece; the coloring mechanism is arranged on one side of the forming mechanism and used for containing coloring liquid; the shifting mechanism comprises a shifting driving part and a mechanical arm installed on the shifting driving part, and the mechanical arm is driven by the shifting driving part to move so as to move the primary pressing piece into the coloring mechanism to be colored and then move the colored primary pressing piece; and the pressing mechanism is used for receiving the colored primary pressing piece and pressing and forming the colored primary pressing piece. According to the drum paper carcass forming device, the drum paper carcass is dyed after being formed, no chemical component is added into the pigment, and the pigment is not in direct contact with the environment, so that the drum paper carcass forming device is environment-friendly, and the water treatment cost is greatly saved.

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 discloses a drum paper assembling method. The drum paper assembling method comprises the following steps that S1, foam materials are formed, meanwhile, the middle part is cut off, and a vibration ring semi-finished product is formed; s2, pasting the vibration ring semi-finished product to the outer edge of a drum paper carcass to obtain a combined body; and S3, positioning the assembly by using the center of the drum paper carcass, and punching the vibration ring semi-finished product of the assembly to remove residual edges so as to obtain a finished product. According to the drum paper assembling method, the vibration ring can be prevented from being damaged, the production progress and the machining precision are guaranteed, and the product yield is increased.

The invention relates to a tympanic membrane production device which comprises a vibrating ring cutting mechanism, a laminating mechanism, a hot pressing mechanism and a material arranging mechanism, the laminating mechanism comprises a vibrating ring feeding manipulator, a carcass feeding manipulator, a material placing assembly and a pressing assembly; the material arranging mechanism comprises a punching feeding mechanical arm, a punching assembly, a punching taking mechanical arm and a stacking assembly. And the punching and feeding manipulator is used for conveying the heated and dried semi-finished tympanic membrane to the punching assembly for punching so as to obtain a finished tympanic membrane product. According to the tympanic membrane production device, the vibrating ring is firstly subjected to hot-press fitting and hot-press forming, and finally the tympanic membrane with the unified size specification is obtained through punching, so that the influence of high temperature on the size change of the vibrating ring is eliminated, and the machining precision of the tympanic membrane is improved; and the carcass is made of a hard material, and the carcass is firstly attached to the vibrating ring, so that the moving of the vibrating ring can be realized by grabbing the carcass, the deformation of the soft vibrating ring is further prevented, and the processing precision of the tympanic membrane is further ensured.