Articles and methods are provided for miniature acoustic transducers having highly compliant suspension systems despite their small size. In various examples the suspension system is molded of a liquid silicone rubber (LSR) and is molded in an interior cavity geometry that includes at least one of a radial offset or an axial offset from a desired geometry of the suspension.

A non-dispensing manufacturing process includes forming a paper cone; engaging the paper cone with a voice coil to form a vibration assembly; fixing a yoke, a magnet set, and a washer to form a magnetic circuit assembly; engaging a basket with the magnetic circuit assembly; and engaging the basket with the vibration assembly to form a speaker, where no glue is used in the manufacturing process. A speaker includes a paper cone; a voice coil engaged with the paper cone to form a vibration assembly, where a junction between a bobbin of the voice coil and the paper cone has a first welding layer; a magnetic circuit assembly including a yoke, a magnet set, and a washer that are integrally fixed; and a basket engaged with the magnetic circuit assembly and the vibration assembly.

A method and system for manufacturing a conical shaped acoustic structure. A sheet of acoustical material is cut to form individual pieces using a cutter system. Each individual piece in the individual pieces has a flat pattern for the conical shaped acoustic structure. An individual piece is positioned around a mandrel with a conical shape using an actuator system. Two edges of the individual piece are positioned for joining. The two edges of the individual piece positioned around the mandrel are joined to form the conical shaped acoustic structure.

Disclosed are a vibrating diaphragm for a sound generating device, a method for preparing the vibrating diaphragm, and a sound generating device. The vibrating diaphragm comprises at least one modified thermoplastic polyester elastomer layer, wherein a modifier is involved which is at least one of a temperature: resistant resin, an inorganic filler and an anti-aging agent, and the modifier is added to a themoplastic polyester elastomer material. In an embodiment of the present invention, by adding the modifier to the themoplastic polyester elastomer material and sufficiently mixing the modifier when making a film layer, the aim of improving the temperature resistance of a moulded vibrating diaphragm is achieved.

The present invention provides a diaphragm including a first polymer substrate material made of polymer material, a second polymer substrate material made of polymer material, and a porous damping substrate material made of porous damping material. The porous damping substrate material has a first side surface and a second side surface opposite to the first side surface. The first polymer substrate material is fixed to the first side surface, and the second polymer substrate material is fixed to the second side surface. The first polymer substrate material and/or the second polymer substrate material are at least partially embedded in the porous damping substrate material. The diaphragm in the invention can reduce the amplitude deviation under high temperature. Further, the invention provides a method for forming the diaphragm and a speaker using the same.

The invention discloses a substrate material and a preparation method thereof, and a diaphragm. The substrate material comprises a first adhesive layer, a second adhesive layer, a first polymer material layer made of polymer material, a second polymer material layer made of polymer material, and a porous damping material layer made of porous damping material. The porous damping material layer comprises a first side surface and a second side surface arranged opposite to each other, the first polymer material layer is glued to the first side surface through the first adhesive layer, the second polymer material layer is glued to the second side surface through the second adhesive layer. The vibration amplitude of products using the substrate material of the present invention has a smaller deviation with increasing temperature, which improves stability of product performance.

The present invention provides a sound generation device and a preparation method of a metal plastic part. The sound generation device comprises a metal plastic part. The metal plastic part comprises a plastic part and a metal insert that is combined with the plastic part. An oxidation film that is obtained through metal nanocrystallization and a nanopore that is formed in a surface of the oxidation film and has a pore diameter of 20-1,000 nm are arranged on a surface of the metal insert. The nanopore is filled with a resin composition from which the plastic part is made. As the nanopore is filled with the resin composition from which the plastic part is made, the metal insert and the plastic part are in close fit with each other, which greatly enhances the gluing capability of the metal insert and prevents the metal insert and the plastic part which are formed through injection molding from being separated. A length of a portion embedded into the plastic part of the metal insert is greatly reduced, such that transfer of ultrasonic energy is smooth. The metal plastic part is effectively prevented from ultrasonic unmelting. Thus, the waterproofness and the sealing property of the metal plastic part are improved. Accordingly, the performance of the sound generation device is improved.

Articles and methods are provided for miniature acoustic transducers having highly compliant suspension systems despite their small size. In various examples the suspension system is molded of a liquid silicone rubber (LSR) and is molded in an interior cavity geometry that includes and apex radially offset and/or axially offset from a desired cured position of an apex of the suspension.

A vibration plate manufacturing device includes: a defibration unit which defibrates a material including fibers and generates a defibrated material formed of fibers having a fibril area of 0.5% to 2.0%; a mixing unit which mixes a binding material for binding the fibers to each other, into the defibrated material; a second web formation unit which accumulates a mixture mixed by the mixing unit; and a molding unit and a heating unit which perform a molding process including pressing and heating on the second web to obtain a molded product.

A passive horn integrally formed by using liquid silicone rubber, includes a first outer casing, a second outer casing, an inner casing and an iron piece. The first outer casing includes a sealing ring, a folding ring and a vibrating membrane, and the sealing ring, the folding ring and the vibrating membrane are integrally injection molded into the first outer casing. A groove is disposed in the second outer casing, and the first outer casing is disposed in the groove. The back surface of the vibrating membrane is provided with a casing groove, which is sequentially embedded with the inner casing and the iron piece. A preparation method of a passive horn integrally formed by using liquid silicone rubber, under the condition of integrated injection molding, may improve the yield rate, ensure product quality, save assembly time and labor cost, and improve production efficiency.