183results about "Polymeric diaphragms" patented technology

A rubber voice diaphragm is composed of main rubber, distortion improving agent, vulcanizing agent, accelerant, reinforcing filler, and other processing aids. The distortion improving agent is a substance with number-average molecular weight ranging from 1000 to 1000000, and structure of distortion improving agent has special chemical crosslinking points that participate in rubber vulcanization reaction. The special chemical crosslinking points are present in amount of 0.01% to 30% based on mass of distortion improving agent. The distortion improving agent is added in amount of 0.1% to 100% based on mass of main rubber. Frequency bands for improving distortion of distortion improving agent range from 0.1 HZ to 20000 Hz. In the rubber voice diaphragm provided in the present disclosure, a special distortion improving agent is selected, which solves the problems of molecular migration, poor reliability, a high modulus change rate, and poor rubber mechanical properties existing in traditional modified method.

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.

A diaphragm for a microspeaker has an organic polymer film layer in direct contact with one or both skin layers. The one or two skin layers independently include a block copolymer having a hard segment and a soft segment, wherein a portion of the hard segment is included in a crystalline physically crosslinked domain. The organic polymer film layer is not sticky at 25 DEG C. A method of making the diaphragm is also described. The method includes co-extruding the block copolymer and an organic polymer to provide a multilayer film comprising the one or two skin layers and the organic polymer film layer in direct contact with the one or two skin layers. A microspeaker including the diaphragm is also described.

Rubber diaphragm, sound device and application thereof are provided; rubber diaphragm includes distortion improving agent with mass percentage of 0.5-50%; distortion improving agent is random linear polymer with more than two monomer components randomly arranged on main chain, and distortion performance is synergistically regulated by monomer components; end group and / or side group and side chain of distortion improving agent includes special chemical reaction crosslinking points with mass percentage of 0.01-20, and number average molecular weight of distortion improving agent is 500-1200000; and distortion improving agent or main chain thereof is prepared by one-step method. Rubber diaphragm includes distortion improving agent, which is random linear polymer that components are randomly arranged on main chain. Sound device of rubber diaphragm is used to reduce distortion of low-frequency band obviously while maintaining good frequency response characteristics; and preparation method of distortion improving agent is simple, low in cost and has wide application.

The present invention discloses a diaphragm for a speaker and a speaker. The diaphragm is made of a single-layer foamed polyester material, and the foamed polyester material is formed into a structure with a dense surface and multiple closed pores inside. The density range of the foamed polyester material is 0.2 g / cm<supgt;3< / supgt> - 1.2 g / cm<supgt;3< / supgt>. The diaphragm is formed into an integrally molded convex structure. The diaphragm includes a first arched portion and a second arched portion arranged in a ring around the first arched portion. The first arched portion is connected to the second arched portion, and the outer periphery of the second arched portion is connected to the housing of the speaker. According to the diaphragm of the present invention, by using a single-layer foamed polyester material to form an integrally molded convex structure, the foamed polyester material has a high specific modulus, enabling the speaker to exhibit better acoustic performance in the medium and high frequencies. Moreover, the integrally molded convex structure can not only simplify the assembly process of the diaphragm but also have good consistency during the vibration process, thereby greatly improving the sound production effect of the speaker.

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.

A loudspeaker transducer diaphragm or cone (e.g., 201, 301 or 401) is configured with arcuate protrusions that project distally from the main forward or distal surface 230 to provide stiffening and a break-up of resonant vibration modes when the loudspeaker is in use. The protrusions (e.g., 210, 310 or 410) are convex on one surface 230 and concave on the opposite surface 234, so their average thickness is similar to the frustoconical areas of the cone, i.e. they are shell-like in nature rather than solid mounds or walls. The protrusions 210 are generally curved as they run radially from the inner opening 204 to the outer peripheral edge to encourage modal break-up (suppressing strong vibrational modes, e.g., as in region 155).

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.

A sound output device may include: a vibration member including a vibration plate including a pattern portion; and a vibrating device configured to vibrate the vibrating member based on the piezoelectric effect. The pattern portion includes one or more of a plurality of holes and a plurality of grooves and is configured to increase an average sound pressure level of the sound output device.

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.

A rubber sound film, and a sound production device and a use thereof. The rubber sound film contains 0.2-60% by mass of a distortion improver. The distortion improver is a block polymer, and an end group or at least one block component of the distortion improver comprises 0.02-25% by mass of a special chemical crosslinking site at which a chemical reaction can occur. The number average molecular weight of each block of the distortion improver is from 300 to 100,000. The distortion improver can be accurately prepared by means of living polymerization or the main body structure can be accurately prepared by means of living polymerization. The rubber sound film contains the distortion improver, and the structure and the content of the special chemical crosslinking site of the distortion improver are accurately controllable, so that the position, height, and width of a damping peak thereof are accurately controllable, and the damping characteristics of the obtained rubber sound film are accurately controllable. When the rubber sound film is applied to the sound production device, the distortion in a low-frequency band can be accurately reduced while good frequency response characteristics are maintained, and the rubber sound film has high controllability, stable performance, and extremely board application range.

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)

A diaphragm is injection-molded using cellulose composite pellets, the cellulose composite pellets comprise at least one of a transparent cellulose material, a resin material, a light diffuser, a dispersant, and a pigment, and the transparent cellulose material is in 30wt% to 70wt%.

A speaker and a method are disclosed, where the speaker comprises a rotary actuator comprising a wound laminate. The laminate comprises a first layer and a second layer each comprising or consisting of a dielectric elastomer, a first electrode disposed between the first layer and the second layer in direct contact therewith. The laminate also comprises a second metal layer disposed between and electrically conductively connected to a first sub-layer of the first electrode and a second sub-layer of the first electrode. The laminate also comprises a second electrode disposed on a side of the first layer distal from the first electrode and in direct contact with the first layer; a third electrode disposed on a side of the second layer distal from the first electrode and in direct contact with the second layer. The laminate also comprises a first metal layer electrically conductively connected to the third electrode.

The present invention discloses a dome, a diaphragm assembly, a sound-generating device, and an electronic device for a sound-generating device; wherein the dome includes a heat-conducting layer and a heat-dissipating layer formed outside the heat-conducting layer; the heat-conducting layer includes at least an organic aerogel material and a heat-conducting filler, the organic aerogel material is oriented in a direction perpendicular to the surface of the dome, and the heat-conducting filler is added to the organic aerogel material and arranged along the orientation direction of the organic aerogel material. The dome of the present invention uses an organic aerogel material to reduce its own mass. Moreover, the present invention adds a heat-conducting filler to the organic aerogel material so that the heat-conducting filler is arranged along the orientation direction of the organic aerogel material, so that the heat can be transferred to the heat-dissipating layer outside the heat-conducting layer, thereby improving the heat dissipation efficiency of the dome.

An electroacoustic transducer 1, particularly a flexural wave transducer, comprising at least one bend-resistant acoustic diaphragm 2 and a solid-state acoustic converter 3 for exciting this acoustic diaphragm 2 is described. In order to achieve an improved acoustic situation, it is proposed that this acoustic diaphragm 2 comprises a support material 4 coated with a synthetic resin, and that its acoustic output surface 5 is composed of at least two, particularly at least three, synthetic resin layers 6 which are joined to one another in a material-bonded form without joining means.

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.