117results about "Polymeric diaphragms" patented technology

There is a composite material for an acoustic transducer diaphragm comprising: a thermoplastic polymer resin, a graphitic filler, and optionally a coupling agent. The thermoplastic polymer resin is selected from the group consisting of polypropylene, polyethylene, poly(methyl methacrylate), polycarbonate, polyoxymethylene, cyclic olefin copolymer, polyethylene terephthalate, acrylonitrile butadiene styrene, polybutylene terephthalate, polyamide, poly(ADP-ribose) polymerase, polyethylenimine, polyamide-imide, polyether ether ketone, polyolefin, polyester, polycarbonate, polysulfone, polyacetals, polyvinyl acetals, polyketone, polyamides, cyclic olefin copolymer, thermoplastic thermotropic liquid-crystal polymer, polyphenylene sulfide, polyimide and a mixture thereof. The graphitic filler is selected from the group consisting of graphene oxide, reduced graphene oxide, graphite, graphene and carbon nanotubes, and a mixture thereof. The coupling agent or a mixture is selected from the group consisting of titanium organometallics, aluminum organometallics, zirconium organometallics, and silicon organometallics.

Provided in the present application are an reinforced dome and a loudspeaker. Preparation raw materials for the reinforced dome comprise a main material and an reinforced material added to the main material, the particle size of the reinforced material being 1 nm-5 μm, and the mass percentage of the reinforced material added to the preparation raw materials being 1-50%. The reinforced dome of the present application comprises the main material and the reinforced material added to the main material. The reinforced material is added to the main material so as to enhance the mechanical properties of the dome, such that compared with those of domes in the prior art made of pure polymer materials or metal materials, the elastic modulus of the reinforced dome obtained in the present application is increased while the quality requirements of the dome is ensured, thus improving the high-frequency performance of loudspeaker products.

A textile enabling control related to sound output is to be provided. A textile according to the present application is characterized by being formed to include foil of an organic piezoelectric film.

The invention relates to a method for manufacturing a transducer unit (1), in particular a MEMS transducer unit, for converting electrical signals into displacements and / or displacements into electrical signals, in which at least one transducer element (3) is arranged on a carrier element (2), and the transducer element (3) is coupled to a membrane unit (5) that is deflectable along a stroke axis (H). According to the invention, to form at least one flexible membrane element (14), a flowable and curable membrane material is cast at least section by section onto a reinforcement element (4) of the membrane unit (5) that is coupled or can be coupled to the transducer element (3), so that the membrane element (14) together with the reinforcement element (4) at least partially forms the membrane unit (5). The invention further relates to the transducer unit (1).

This application discloses a diaphragm for a sound-generating device and its preparation method, as well as the sound-generating device itself. The diaphragm comprises at least one microporous polyurethane elastomer film layer, which includes a polyurethane elastomer and a micropore-forming material. The microporous polyurethane elastomer film layer has micropores. The micropore-forming material includes inorganic hollow microspheres, with the content of inorganic hollow microspheres accounting for 5wt% to 50wt% of the total amount of the microporous polyurethane elastomer film layer. The average pore size of the micropores is 1μm to 60μm, and the loss factor of the microporous polyurethane elastomer film layer at room temperature is ≤0.15. The diaphragm of this application, by incorporating inorganic hollow microspheres into the polyurethane elastomer to form a microporous polyurethane elastomer film layer, not only reduces the density of the diaphragm and improves the mid-frequency sensitivity of the sound-generating device, but also, by controlling the amount of inorganic hollow microspheres added, enables the diaphragm material to have suitable damping, balancing the strength and transient resilience required during diaphragm vibration.

The invention provides a UTG diaphragm loudspeaker comprising a magnetic assembly used for generating magnetic lines of force; the vibrating diaphragm comprises UTG glass, and the thickness of the vibrating diaphragm ranges from 0.01 mm to 0.1 mm; and the voice coil is configured corresponding to the vibrating diaphragm and is matched with the magnetic assembly to generate driving force to push the vibrating diaphragm to vibrate, and the thickness of the vibrating diaphragm is as thin as 0.01 mm.

The present disclosure provides a conductive diaphragm and a speaker using same. The conductive diaphragm includes a main portion made of polymer material and a conductive portion located on the main portion. The conductive portion includes a substrate with a film layer and conductive material dispersed in the substrate, the film layer is solidified from at least one material of thermoplastic elastomer, phenyl silicone, isoprene rubber, or fluoroelastomer. Compared with the related technologies, the conductive diaphragm disclosed by the present disclosure has excellent atigue-resistant property and could maintain good adhesive strength and toughness.

[Problem] To provide a higher performance and higher quality curved diaphragm speaker system that has sufficient performance for hard-of-hearing people and also for hearing people. [Solution] A speaker unit 10 according to the present invention at least includes: a first diaphragm 1 in a cone shape; a blade piece 5 in a plate shape to which a second diaphragm in a sheet shape forming a rounded surface portion that is curved from one end side to the other end side; and a driver unit 3 that drives those cone shaped diaphragm and blade piece together. The blade piece is connected via a center cap attached to a tip end of a voice coil of the driver unit so as to protrude from a small diameter 1a side to a large diameter 1b side of the first diaphragm. In the first diaphragm, the small diameter side is connected to the driver unit, and also the large diameter side is attached to a cone support frame 9. Additionally, the second diaphragm is arranged such that the one end side is overlapped with one surface of the blade piece.

Provided is a speaker diaphragm that can uniformly increase rigidity throughout the entire area. A speaker diaphragm 1 of the present invention includes a base material having a resin matrix 2 with a thermoplastic resin as a main component and fibers 3 dispersed in the resin matrix 2, the fibers 3 being poly-p-phenylene benzobisoxazole fibers, the average length of the fibers 3 being 0.5 mm or more and 3.0 mm or less, and the content of the fibers in the base material being 3 mass% or more and 15 mass% or less.

The present application discloses a diaphragm of a sound-generating device and a sound-generating device. The diaphragm includes at least one modified ethylene-vinyl acetate rubber membrane layer, which is prepared by mixing inorganic hollow microspheres, additives, and ethylene-vinyl acetate polymer to form a mixed rubber and then cross-linking the mixed rubber; the particle size of the inorganic hollow microspheres is 1 μm to 60 μm, and the distribution density of the inorganic hollow microspheres in the modified ethylene-vinyl acetate is 0.15 g / cm 3 ~0.9g / cm 3 The modified ethylene-vinyl acetate rubber membrane layer has a loss factor of ≥0.11 after being baked at 150°C for 168 hours. The diaphragm of the present application is made by cross-linking a modified ethylene-vinyl acetate rubber membrane layer prepared by mixing inorganic hollow microspheres, additives, and ethylene-vinyl acetate polymer to form a rubber mixture. This not only improves the mid-frequency sensitivity of the sound-generating device, but also ensures that the diaphragm material still has excellent damping performance in high-temperature environments.

The present invention belongs to the technical field of electroacoustics, and specifically relates to a diaphragm of a sound-producing device, and a sound-producing device. The diaphragm of the sound-producing device of the present invention comprises at least one phenyl silicone rubber layer, which contains a network polymer. The phenyl silicone rubber layer is formed by curing a liquid phenyl silicone rubber compound, which comprises methylphenyl vinyl polysiloxane, a methylphenyl vinyl silicone resin and a hydrogen-containing phenyl silicone oil. In the present invention, the diaphragm having the phenyl silicone rubber layer can significantly improve the adhesive force of the diaphragm to a housing and to a voice coil. Moreover, the hydrogen-containing phenyl silicone oil and methylphenyl vinyl polysiloxane have good compatibility, which makes the curing uniformity of the phenyl silicone rubber layer better, and the mechanical properties thereof more balanced and less prone to failing. In addition, the diaphragm of the present invention has high damping performance and can also significantly reduce THD distortion of the diaphragm, thus resulting in better acoustic performance.

A transducer is described. The transducer has a static structure having a magnetic gap surrounding an axis and a wall portion extending parallel to and facing the axis; a dynamic structure having a coil body surrounding the axis; a coil wound around the coil body, the coil body being housed in the magnetic gap; a diaphragm extending outwardly from the axis and secured to the coil body, the diaphragm having an outer peripheral edge proximate to the wall portion, the outer peripheral edge being not attached to the wall portion; and a suspension connecting the static structure to the dynamic structure, the suspension limiting a degree of freedom of movement of the dynamic structure relative to the static structure to axial movement along the axis, the suspension biasing the dynamic structure to a rest position, thereby defining a movement span xmax, the span of movement x maximum is axially defined parallel to the axis between an x positive position and an x negative position, and the wall portion covers the span of movement x maximum.

The present invention relates to an acoustic membrane (14a) for an acoustic transducer, the membrane comprising a substrate (21); and at least one reinforcement layer (23a-23b) of the substrate (21), the at least one reinforcement layer (23a-23b) enabling to improve the stiffness of the membrane (14a). The reinforcement layer (23a-23b) of the substrate (21) corresponds to an amorphous carbon layer belonging to the DLC family and has a stiffness greater than 300 GPa, a density lower than 3400 kg / m 3 and a thickness between 0.5 pm and 6 pm. The reinforcement layer (23a-23b) is attached to the substrate (21) with a bonding layer (22a-22b) having a thickness between 0.1 pm and 1 pm and comprising at least one metallic compound.

Described herein are thermoplastic core-sheath fibers. The thermoplastic core-sheath fibers include a core having a coextensive sheath layer disposed thereon, the core including a first polymeric resin and a charge-enhancing additive, and the sheath layer including a second polymeric resin, with the proviso that when the second polymeric resin includes poly(4-methyl-1-pentene), the second polymeric resin does not include 100% by weight of poly(4-methyl-1-pentene). These thermoplastic core-sheath fibers can be used in filtration applications.

Disclosed are a diaphragm for a miniature sound-generating device, and a miniature sound-generating device. The diaphragm is made of a polyacrylate copolymer, the polyacrylate copolymer comprises an "ethylene-acrylate copolymer", a mass ratio of a polyethylene block to a polyacrylate block in the polyacrylate copolymer is 0.05-10, a cross-linking agent is mixed in the polyacrylate copolymer, and the cross-linking agent comprises a peroxide cross-linking agent and an assistant cross-linking agent. The diaphragm provided in the disclosure possesses excellent sound performance. (Fig. 8)

The present application discloses a diaphragm of a sound-generating device and a sound-generating device. The diaphragm includes at least one modified acrylic rubber membrane layer, which is prepared by mixing inorganic hollow microspheres, additives, and acrylic polymer to form a mixed rubber and then subjecting it to a cross-linking reaction. The particle size of the inorganic hollow microspheres is 1 μm to 60 μm, and the distribution density of the inorganic hollow microspheres in the modified acrylic rubber membrane layer is 0.15 g / cm 3 ~0.9g / cm 3 After the modified acrylic rubber membrane layer is immersed in an oily solvent at 150°C for 70 hours, the fracture strength decrease ratio of the modified acrylic rubber membrane layer is ≤30%, and the swelling ratio is ≤20%. The diaphragm of the present application is prepared by cross-linking a modified acrylic rubber membrane layer prepared by mixing inorganic hollow microspheres, additives, and acrylic polymer to form a rubber compound. This not only reduces the density of the diaphragm material and improves the mid-frequency sensitivity of the sound-generating device, but also makes the diaphragm material have excellent resistance to solvent swelling.

In one or more examples, a sound apparatus includes an enclosure including an internal space, a sound generating module in the internal space of the enclosure, and a coupling member partially provided between the enclosure and the sound generating module. One or more examples of a vehicular apparatus having the sound apparatus are also disclosed.

Membrane (1) for use in an audio transducer, wherein the membrane (1) has a first outer surface, a second outer surface opposite the first outer surface, and a support structure, wherein a skin (8) defines the first outer surface of the membrane (1), wherein the support structure is arranged on or in the skin (8), and wherein the support structure has a honeycomb pattern structure (110) which has an arrangement of substantially regular cells (110b) with a defined geometry, wherein the skin (8) is a first skin (108), wherein the membrane (1) further comprises a second skin (112), wherein the honeycomb pattern structure (110) is arranged between the first and second skin (108, 112) and wherein the second skin (112) defines the second outer surface of the membrane (1), wherein the honeycomb pattern structure (110) is integrally formed with the first skin (108), and wherein the second skin (112) is connected to the honeycomb pattern structure (110) but is not integrally formed with it to form the membrane (1), or wherein the honeycomb pattern structure (110) is integrally formed with the second skin (112) and wherein the first skin (108) is connected to the honeycomb pattern structure (110) but is not integrally formed with it to form the membrane (1).

The present application belongs to the field of electroacoustic technology, and particularly relates to a diaphragm of a sound emitting device and the sound emitting device. The diaphragm of the sound emitting device comprises at least one phenyl silicone rubber layer, the phenyl silicone rubber layer contains a network polymer, the phenyl silicone rubber layer is formed by curing a liquid phenyl silicone rubber compound, and the liquid phenyl silicone rubber compound comprises methylphenylvinyl polysiloxane, methylphenylvinyl silicone resin and phenyl hydrogen-containing silicone oil. The diaphragm with the phenyl silicone rubber layer can significantly improve the adhesion of the diaphragm, the shell and the voice coil. Meanwhile, the phenyl hydrogen-containing silicone oil and the methylphenylvinyl polysiloxane have good compatibility, so that the curing uniformity of the phenyl silicone rubber layer is better, the mechanical properties are more balanced and the failure is less likely to occur. In addition, the diaphragm has high damping performance, can significantly reduce the THD distortion of the diaphragm, and has better acoustic performance.

The invention relates to a balanced armature, BA, receiver, a hearing device comprising the BA receiver and a method for producing the BA receiver. The BA receiver comprises a magnet assembly, an electromagnetic coil, an armature and a diaphragm element. The magnet assembly generates a magnetic field in an air gap. The coil comprises a coil tunnel. The armature extends through the air gap and the coil tunnel. The diaphragm element comprises a membrane portion and a sealing rim that are formed as an integral part. The membrane portion is directly attached to the armature for moving the membrane portion with the armature. The sealing rim extends along the perimeter of the membrane portion and is arranged to seal a front volume of the receiver from a back volume of the receiver.

The present application discloses a diaphragm of a sound-generating device and a sound-generating device. The diaphragm includes at least one modified styrene-butadiene rubber membrane layer, which is prepared by mixing inorganic hollow microspheres, additives, and polystyrene-butadiene copolymer to form a mixed rubber and then cross-linking the mixed rubber. The diameter of the inorganic hollow microspheres is 10 μm to 100 μm, and the distribution density of the inorganic hollow microspheres in the diaphragm is 0.15 g / cm 3 ~0.9g / cm 3 The strain recovery ratio of the diaphragm after relaxation for 5 minutes at 23°C and 10% strain is ≥70%. This invention uses a modified styrene-butadiene rubber membrane layer prepared by cross-linking inorganic hollow microspheres, additives, and polystyrene butadiene copolymer to form a rubber compound. This improves the resilience of the diaphragm material, reduces the density of the diaphragm, and improves the mid-frequency sensitivity of the sound-generating device.

Membrane material for loudspeaker drivers and material for dust caps of loudspeaker drivers, characterized in that it consists of pure or at least very pure β-polypropylene. The material preferably consists of isotactic polypropylene homopolymer. The crystallinity of the material is preferably between 40% and 65%. The crystals (β-polypropylene crystals) preferably have a size of 10 µm to 20 µm. For a crystal size of 15 µm, the side length is approximately 7.5 µm and the two large faces each have a size of approximately 146 µm. 2 The crystal's height is approximately 2.6 µm and its volume is approximately 380 µm³. 3 . The spherulites (clusters of crystals) of the material preferably have a size of 300 µm to 1200 µm.

The invention discloses a micro loudspeaker structure and a forming method thereof. The micro loudspeaker structure comprises a substrate, a vibrating diaphragm, a coil, a bearing plate and a permanent magnetic element. The substrate is provided with a hollow cavity. The vibrating diaphragm is arranged on the substrate and covers the hollow cavity. The diaphragm includes an etched pattern recessed from a first surface of the diaphragm. The etched pattern is used to increase a sound pressure level within a specific frequency range. The coil is embedded in the vibrating diaphragm. The bearing plate is arranged on the bottom surface of the substrate. The permanent magnetic element is arranged on the bearing plate and located in the hollow cavity. The first surface of the diaphragm faces the permanent magnetic element.

The present invention provides a loudspeaker assembly for use on the outside of a vehicle. The diaphragm and surround are formed of a single piece of material, the material comprising a single layer woven fabric of orthogonal, woven fibers and a thermoset resin.

The present application discloses a diaphragm of a sound-generating device and a sound-generating device. The diaphragm includes at least one modified nitrile rubber membrane layer. The modified nitrile rubber membrane layer is prepared by mixing inorganic hollow microspheres, additives, and a polymer of acrylonitrile and butadiene monomers to form a mixed rubber, followed by a cross-linking reaction. The diameter of the inorganic hollow microspheres is 10 μm to 100 μm, and the distribution density of the inorganic hollow microspheres in the modified nitrile rubber membrane layer is 0.15 g / cm 3 ~0.9g / cm 3 , the specific surface area of ​​the inorganic hollow microspheres is ≥0.9, and the loss factor of the modified nitrile rubber film layer at room temperature is >0.13. The present application can effectively reduce the density of the diaphragm by adding inorganic hollow microspheres to the polymer of acrylonitrile and butadiene monomers. Moreover, by controlling the diameter of the inorganic hollow microspheres and their distribution density in the modified nitrile rubber film layer, the specific surface area of ​​the inorganic hollow microspheres can be made ≥0.9, thereby improving the bonding strength between the inorganic hollow microspheres and the polymer, thereby improving the structural strength of the diaphragm.

The present invention provides a loudspeaker assembly for use on the outside of a vehicle. The diaphragm and surround are formed of a single piece of material, the material comprising a single layer woven fabric of orthogonal, woven fibers and a thermoset resin.

A micro speaker structure is provided, including a substrate, a diaphragm, a coil, a carrier board, and a permanent magnetic element. The substrate has a hollow chamber. The diaphragm is disposed over the substrate and covers the hollow chamber. The diaphragm includes an etching pattern recessed form a first surface of the diaphragm. Etching patterns are used to increase sound pressure level at special frequency range. The coil is embedded in the diaphragm. The carrier board is disposed on the bottom surface of the substrate. The permanent magnetic element is disposed on the carrier board and in the hollow chamber. The first surface of the diaphragm faces the permanent magnetic element.