An apparatus is provided that includes the following: a surface arranged to be mechanically displaced; a first magnet coupled with the surface; at least one supporting member for supporting the surface; a base comprising a second magnet, wherein the second magnet is arranged, at least partially, to face the first magnet; a coil coupled with the second magnet: and a signal port electrically coupled with the coil, wherein an electrical signal is configured to travel between the signal port and the coil, and wherein the electrical signal in the coil is proportional to mechanic displacement of the surface when a force equilibrium state of the surface is broken either by the electrical signal in the coil or the mechanic displacement of the surface from a position of the force equilibrium state.

A panel audio loudspeaker includes an actuator module. The actuator module includes an intermediate layer. The intermediate layer has a voice coil connected to the intermediate layer at a first surface. The actuator module includes a magnet assembly including a plurality of magnets. At least one pair of magnets are separated by an air gap. The actuator module includes a frame connected to the intermediate layer at the first surface, one or more springs connected to the frame and suspending the magnet assembly relative to the frame so that the voice coil extends at least partially into the air gap, and a spacer connected along a portion of the intermediate layer at a second surface of the intermediate layer opposite the first surface. A stiffness of the spacer at a region of connection to the intermediate layer is less than a stiffness of the intermediate layer at the connection portion.

The application discloses a bone conduction earphone and a method for assembling bone conduction earphone. The bone conduction earphone includes: a first bone conduction acoustic device; a second bone conduction acoustic device; the control compartment, which includes a main control board for controlling the first bone conduction acoustic device and the second bone conduction acoustic device; and the battery compartment, which includes a power supply for supplying power to the first bone conduction acoustic device, the second bone conduction acoustic device and the main control board. The bone conduction earphone of the present application has a more compact structure and a more convenient and efficient assembly.

Disclosed is a multifunctional sounding device which combines functions of emitting sounds and providing vibrations and includes a housing; a speaker unit including a vibration assembly vibrating along a first direction and a magnetic assembly including a main magnet and an auxiliary magnet; an elastic member suspending the speaker unit in the housing; a flexible sealing membrane assembly connected between the housing and the speaker unit including an outer ring, an inner ring, and a flexible sealing membrane connected between the two rings; and a driving coil driving the speaker unit for vibrating in a second direction including two sides respectively facing the main magnet and the auxiliary magnet in the first direction. The two directions are perpendicular. The outer ring, the flexible sealing membrane and the inner ring are integrally formed, thereby achieving a high structural consistency and avoiding glue width requirements so as to release spaces.

Provided is a multifunctional sounding device and an electronic device. The multifunctional sounding device includes a casing, a sounding body accommodated in the casing, a vibrator assembly and an elastic supporting member for suspending the vibrator assembly in the accommodating space and providing elastic restoring force. The sounding body includes a vibration system and a magnetic circuit system for driving the vibration system to sound. The elastic supporting member includes a first supporting arm fixed to the vibrator assembly, bent portions bent and extended from both ends of the first supporting arm, and second supporting arms extended away from the first supporting arm and both fixed to the casing. A thickening member is arranged on each bent portion, and a sum of a thicknesses of each bent portion and the thickening member is greater than a thicknesses of the first supporting arm and the second supporting arm.

An exciter (1) includes a vibrator (2) including a yoke and a magnet, a frame (3) incorporating the vibrator (2) with a damper (4) therebetween, and a voice coil bobbin (5) disposed inside the frame (3) and having another end (5b) that extends to near the vibrator (2) and is provided with a voice coil (11). The frame (3) has an opening (3b), and the voice coil bobbin (5) is mounted on the edge of the opening (3b). One end (5a) of the voice coil bobbin (5) is opened to the outside of the frame (3). The voice coil bobbin (5) is provided with a vibrating member (10) that covers the opened portion.

The present disclosure provides a speaker, including a vibrating system and a magnetic circuit system driving the vibrating system to vibrate and sound, the magnetic circuit system includes a main magnet assembly, the main magnet assembly includes a first main magnet, a magnetic conductive piece and a second magnet which are arranged by stacking, poles of the first main magnet and the second main magnet having a same polarity are opposite to each other, the magnetic conductive piece includes a body portion clamped between the first main magnet and the second main magnet, and a clamping portion bending and extending from the body portion, the clamping portion includes a first clamping portion for fixing the first main magnet and a second clamping portion for fixing the second main magnet. The speaker provided by the present disclosure improves acoustic performance through providing the clamping portion on the magnetic conductive piece.

A loudspeaker unit includes: a housing (100), a magnetic assembly (300) disposed in the housing (100), a diaphragm (220) disposed on the housing (100), a first voice coil (210a) connected to the diaphragm (220), and the magnetic assembly (300) is connected to the housing (100) by an elastic element (400). The magnetic assembly (300) vibrates along with the elastic element (300) with respect to the housing (100) when the elastic element (400) vibrates.

A loudspeaker is provided with a magnet assembly with an overall length aligned along a longitudinal axis and a frame with a wall encircled around the magnet assembly with a length aligned along the longitudinal axis, wherein the magnet assembly and the wall define a voice coil gap. The loudspeaker is also provided with a voice coil disposed in the voice coil gap; wherein the magnet assembly is symmetrically aligned with the wall such that a halfway point of the overall length of the magnet assembly coincides with a midpoint of the length of the wall.

Electroacoustic drivers that can be utilized in loudspeaker systems that utilize drivers having a magnetic negative spring (MNS) (such as reluctance assist drivers (RAD) and permanent magnet crown (PMC) drivers). The electroacoustic drivers can be used at all audio frequencies, including subwoofer frequencies. The magnetic negative springs of the electroacoustic drivers can cancel, or partially cancel, the large pressure forces on a sound panel (of an audio speaker) so that substantial subwoofer notes can be efficiently and cost effectively produced in small/portable speakers. The electroacoustic drivers can include a stabilizing/centering mechanism to overcome the destabilizing forces of a MNS that are too large for a voice coil alone to produce.