A loudspeaker includes: a diaphragm; a magnetic circuit; a frame that holds the magnetic circuit; an edge that is annular and connects the diaphragm and the frame; and a voice coil body that is disposed in a magnetic gap of the magnetic circuit. The diaphragm includes: a central portion; and an outer-circumferential portion that is provided as a single piece together with the central portion in an outer periphery of the central portion, and is bonded to the edge at a location in a vicinity of the central portion.

The present invention discloses a micro speaker, including a frame with a containment space, a magnetic circuit system and a vibration system accommodated in the containment space. The vibration system includes a first diaphragm, a dome skeleton fixed to the first diaphragm, and a voice coil fixed on the dome skeleton. A welding plate structure is fixed on the dome skeleton, and a first circuit board and a second circuit board fixed to the frame respectively. The first diaphragm includes a first diaphragm area and a second diaphragm area. The thickness of the first diaphragm area is greater than the thickness of the second diaphragm area. The local thickening material is adopted to avoid the problem of speaker rigidity asymmetry caused by unbalanced heat distribution, so as to realize the stable operation of the speaker, and the manufacturing process is simple.

Some embodiments of the present invention disclose a miniature sounder. The miniature sounder includes a frame, and a vibration system and a magnetic system that are fixedly connected to the frame; the magnetic system includes a lower clamping board, a primary magnet that disposed on the lower clamping board, a cushion that disposed on the lower clamping board and surrounding the primary magnet and a secondary magnet that disposed on the cushion and surrounding the primary magnet, the cushion being disposed between the secondary magnet and the lower clamping board; and the vibration system includes a voice diaphragm, a voice coil that disposed below the voice diaphragm and causing the voice diaphragm to vibrate and generate a sound and a vibration diaphragm elastically supporting the voice coil, the vibration diaphragm comprising a corrugated rim portion, a fixing portion and a connecting portion.

Speakers for locating in a vehicle exhaust system having a speaker surround that is formed from a rubber compounded using a polyacrylate polymer. Speakers having a speaker surround that is integral with a coating that covers or substantially covers at least one surface of the diaphragm.

An electronic device and a loudspeaker are provided. The loudspeaker includes: a hollow frame for being connected to the electronic device, a vibration means for producing sound through vibration, a voice coil for driving the vibration apparatus means and a magnetic circuit having a magnetic property and arranged at a lower end of an interior of the hollow frame, wherein an end face opening is provided at an upper end of the hollow frame; the vibration means covers the end face opening; one end of the voice coil is connected to the vibration means, and the other end can enter a gap of the magnetic circuit to perform reciprocating motion; the vibration means includes a vibrating diaphragm and a top dome fixedly installed in the middle of the vibrating diaphragm; an outer edge of the vibrating diaphragm is connected to an edge of the end face opening.

A surround that is generally arched in shape and that includes a radial exterior flange that extends downward from exterior side of the arched portion of the surround and that adhesively attaches to the inner wall or edge of the mounting ring of the frame or the loudspeaker.

A loudspeaker diaphragm includes a cone having a curved surface from the outer to the inner periphery, and an annular edge of which inner peripheral part is bonded to the front side of the outer peripheral part of the cone. When seen from the front, the outer periphery of the cone is defined by smooth connection of three larger-diameter parts tangent to a first circle with a larger diameter, and three smaller-diameter parts each located between adjacent two of the three larger-diameter parts and tangent to a second circle with a smaller diameter. In the cone, a shape defined by connecting together points at the same position on the central axis is more circular as the points approach the inner periphery from the outer periphery. The inner periphery of the edge has a smaller radius than the second circle.

A bone conduction transducer includes a yoke having a pair of arms, a layer of high permeability steel on a surface of the yoke between the arms, a metal coil, a metallic post that extends into a center portion of the metal coil, a diaphragm, an anvil attached to a surface of the diaphragm, a pair of permanent magnets attached to an opposite surface of the diaphragm, and a pair of springs. A first end of each spring is attached to a respective one of the arms of the yoke, and a second end of each spring is coupled to the diaphragm. The diaphragm is configured to vibrate in response to a signal supplied to the metal coil. The diaphragm, anvil, and/or metallic post could be formed from a high permeability steel.

Disclosed is a vibrating film comprising a vibrating film body, wherein the vibrating film body comprises a central plane part and a peripheral fixing part, a Dome reinforcing part is arranged on the plane part, a first thermosetting adhesive layer is provided between the plane part and the Dome reinforcing part, and the plane part and the Dome reinforcing part are adhered together by thermosetting through the first thermosetting adhesive layer. Further disclosed is an assembling process for the vibrating film. The vibrating film of the present invention is high in adhesive force between parts and good in high frequency properties

The present disclosure discloses a method for forming a silica gel diaphragm and a silica gel diaphragm prepared using the method. The method for forming a silica gel diaphragm includes at least the following steps: step S1: providing a hot pressing mould, and placing at least a dome as an embedment into the hot pressing mould; step S2: injecting liquid silica gel into the hot pressing mould; and step S3: molding the liquid silica gel via hot pressing so as to obtain a silica gel membrane which is at least connected with the dome. The method for forming a silica gel diaphragm provided by the present disclosure is easy to conduct and the formed silica gel diaphragm has good performance.