A transducer assembly comprising: a magnet motor assembly comprising a first magnet plate and a second magnet plate arranged along an axis, a first support plate positioned between inward facing surfaces of the first magnet plate and the second magnet plate, a second support plate positioned along an outward facing surface of the first magnet plate to form a first magnetic gap between the first support plate and the second support plate, and a third support plate positioned along an outward facing surface of the second magnet plate to form a second magnetic gap between the first support plate and the third support plate; a voice coil coupled to the magnet motor assembly, wherein the voice coil is positioned around the first support plate and within the first magnetic gap and the second magnetic gap; and a piston coupled to the voice coil, wherein the piston is operable to vibrate in a direction parallel to the axis.

The present invention discloses a receiver comprising an outer housing that consists of a first housing, a second housing and a third housing fitting to each other from top to bottom. The third housing is an integral structure, and includes a magnetic conductive piece and a plastic piece integrally injection-molded therewith. The magnetic conductive piece is bonded and fixed with a magnet and a washer. The magnetic conductive piece, the magnet and the washer together form a magnetic circuit system of the receiver, and the third housing is fixed with the second housing by ultrasonic welding through the plastic piece. The receiver of the present invention can realize one-step assembly of the rear cavity housing of the product, simplify the production process of the product, save the production time, and further reduce the production cost of the product.

A speaker apparatus capable of operating in a large amplitude regime by minimizing magnetic loss, is provided. The speaker device includes a magnet configured to generate a magnetic flux, a pole piece configured to form a path of the magnetic flux generated by the magnet, a back plate provided at a lower end of the pole piece to support the magnet, and a plate provided to form a magnetic gap between the plate and the pole piece. Several plates may be provided so that the magnetic gap is expanded to enlarge amplitude of output sound.

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.

Disclosed is a miniature loudspeaker, comprising a magnetic circuit system which comprises a yoke, a magnet and a washer, the yoke and the magnet are fixedly bonded, the magnet and the washer are fixedly bonded, a snap-fitting portion and a limiting portion, which are mutually cooperated, are disposed on the yoke and the magnet and/or on the magnet and the washer, the limiting portion is a structure formed by removing material, the snap-fitting portion and the limiting portion are both located on bonding surfaces of two components, and the limiting portion and the snap-fitting portion are coupled and fixed.

Disclosed is a speaker device, comprising a vibration system, a magnetic circuit system, and an auxiliary system fixedly accommodating the magnetic circuit system and the vibration system. The vibration system comprises a center suspension comprising a first fixing portion, a second fixing portion within the first fixing portion, and a connecting arm connecting the first fixing portion and the second fixing portion. A central position of the second fixing portion is provided with a piezoelectric piece, the center suspension is provided with a first pad corresponding to the piezoelectric piece, and the piezoelectric piece is electrically connected to the first pad. The second fixing portion is provided with an antenna circuit. In the speaker device of the present invention, the signal emitted by the piezoelectric piece effectively increases the medium and high frequency effect and enhances the acoustic performance. The antenna circuit integrates the antenna device and the speaker device.

A magnetic circuit includes: a magnet including a first and a second surface; a top plate disposed on the first surface; a bottom plate coupled magnetically with the second surface; and a yoke coupled magnetically with the bottom plate and disposed so as to protrude from the bottom plate along a first direction. The second surface is parallel to the first surface. The first and the second surfaces are magnetized. The yoke includes a magnetic pole face that opposes the top plate. In a portion where the magnetic pole face is formed, of the yoke, a magnetic saturation part is disposed to generate magnetic saturation. The magnetic saturation part has a shape in which an area of a cross section perpendicular to the first direction decreases with nearness to a tip of the yoke along the first direction.

A transducer system, comprising an electrodynamic acoustic transducer (1) with a membrane (3), a plurality of voice coils (7, 8) electrically switched in series, and a magnet system (9, 10, 11) is presented, wherein just an outer tap/terminal (T2) of the serially connected voice coils (7, 8) is electrically connected to an audio output of an amplifier (17). Moreover, a method for feeding a sound signal to an electrodynamic acoustic transducer (1) is presented, wherein the voice coils (7, 8) are driven by an audio signal just via an outer tap/terminal (T2) of the serially connected voice coils (7, 8).

The invention provides a loudspeaker with a fin-reinforced voice coil structure, comprising a voice coil, fins, an upper magnetic conductor, and a magnetic conduction column, wherein a magnetic gap is formed between the upper magnetic conductor and the magnetic conduction column located in the center thereof; the voice coil works in the magnetic gap; wherein the inner wall of the voice coil is connected to the fins; wherein one end of each fin is connected and fixed to the inner wall of the voice coil; wherein the magnetic conduction column is provided with fin grooves for accommodating the other ends of the fins; wherein the width of the fin grooves is at least 0.2 mm greater than the thickness of the fins, so that the balance performance and the stability of the voice coil are greatly improved. The distortion is greatly reduced compared, by measurement, with the traditional voice coil.

The present invention discloses a receiver comprising an outer housing that consists of a first housing, a second housing and a third housing fitting to each other from top to bottom. The third housing is an integral structure, and includes a magnetic conductive piece and a plastic piece integrally injection-molded therewith. The magnetic conductive piece is bonded and fixed with a magnet and a washer. The magnetic conductive piece, the magnet and the washer together form a magnetic circuit system of the receiver, and the third housing is fixed with the second housing by ultrasonic welding through the plastic piece. The receiver of the present invention can realize one-step assembly of the rear cavity housing of the product, simplify the production process of the product, save the production time, and further reduce the production cost of the product.