Abstract: The present exemplary embodiments proposes a vacuum tube amplifier module which removes a noise caused by external shock or vibration, including a vacuum tube amplifier which includes an amplifier in a vacuum tube to increase an energy of an input signal to output the energy as an output signal, an assembly unit which fixes at least one side of the vacuum tube amplifier so as to primarily remove the noise, and a magnet which is assembled in the assembly unit to levitate the amplifier so as to secondarily remove the noise to make the noise a predetermined reference value or lower.

Abstract: The present invention provides an acoustic device including a frame, a vibration system and a magnetic circuit system. The vibration system includes a diaphragm, a voice coil, a voice coil holder connecting the diaphragm and the voice coil, and a support assembly connecting the frame and the voice coil holder. The voice coil holder comprises a first fixing portion extending toward a direction of the voice coil, a second fixing portion extending toward to the support assembly, and a first connecting portion connecting the first fixing portion and the second fixing portion. The first fixing portion is mounted to the voice coil, and the second fixing portion is mounted to the support assembly. The first connecting portion provides with a reinforcing rib protruding and extending from the first fixing portion.

Abstract: The present disclosure provides a speaker including a frame having an accommodating space, a vibration system and a magnetic circuit system that are accommodated in the accommodating space. The vibration system includes a first diaphragm configured to vibrate and produce sound, a voice coil located below the first diaphragm and configured to drive the first diaphragm to vibrate and produce sound, a flexible circuit board electrically connected to the voice coil and elastically supporting the voice coil, and a second diaphragm fixed to the flexible circuit board. The flexible circuit board includes a first fixing portion connected to the voice coil, a second fixing portion disposed opposite to and separately from the first fixing portion, and an elastic arm connecting the first fixing portion and the second fixing portion. An orthogonal projection of the elastic arm toward the second diaphragm is partially located within a range of the second diaphragm.

Abstract: A speaker including a frame, and a magnet assembly coupled to the frame. The magnet assembly forms an air gap through which a magnetic flux is directed. The speaker further including a voice coil suspended in the air gap, a diaphragm coupled to the voice coil and a compliant suspension member for suspending the voice coil within the air gap. The suspension member includes an electrically conductive member for providing an electrical connection between the voice coil and a circuit coupled to the frame.

Abstract: A sound converter includes a rectangular frame, a first suspension seated on an upper side of the frame to vibrate, a second suspension attached to a bottom surface of the first suspension and electrically connected to a voice coil to vibrate, a magnetic circuit including a center magnet, a plurality of sub-magnets spaced apart from the center magnet by a certain distance to define a magnetic gap, a plurality of top plates positioned above the center magnet and each sub-magnet, and a bottom plate positioned below the center magnet and each sub-magnet, and a third suspension connecting a lower end or a lower end lateral surface of the voice coil to the frame to vibrate. The voice coil is attached to a bottom surface of the second suspension. The third suspension is positioned through spaces defined by the sub-magnets being spaced apart from each other.

Abstract: Provided is a speaker, including a holder, a vibration unit and a magnetic circuit unit, and a holder pad. The vibration unit includes a first diaphragm, a voice coil configured to drive the first diaphragm to vibrate and emit sound, and a flexible circuit board. The holder includes a bottom surface facing away from the first diaphragm, and the flexible circuit board is fixed to the bottom surface. The holder pad is arranged correspondingly to the flexible circuit board and sandwiched between the bottom surface and the flexible circuit board. The holder pad includes a first pad electrically connected to the flexible circuit board, a second pad exposed out of the holder, and a connection portion connecting the first pad with the second pad. The first pad is electrically conducted with the second pad, and the second pad is connected to an external circuit.

Abstract: A digital image of a speaker spider may be received from an optical microscope or laser microscope. The digital image is filtered to fill in voids in the digital image, where the voids are indicative of holes in the speaker spider. The filtered digital image is compared to design criteria. An indication on a display screen may indicate whether the fabricated speaker spider meets the design criteria.

Abstract: The present disclosure provides an acoustic device. A vibrating diaphragm includes an edge and a damper for fixing and supporting the edge, where the damper includes a middle dome and a circuit board for fixing and supporting the middle dome, the fixing part of the circuit board is provided with a conductive part electrically connected to a voice coil lead; and an orthographic projection of the middle dome on the circuit board is not overlapped with the conductive part. The orthographic projection of the middle dome of the acoustic device on the circuit board is not overlapped with the conductive part during spot welding between the circuit board and the voice coil, therefore the problem of a short circuit of an aluminum foil dome caused by the fact that the circuit board is broken down due to overhigh spot welding temperature and pressure can be avoided.

Abstract: An electro-acoustic transducer includes an accordion-type structure that functions as both an acoustic radiation element and an acoustic seal. In one example, the transducer includes parallel, accordion-type structures that attach to a flat, rectangular diaphragm. The diaphragm is connected to a voice coil. The voice coil and an associated frame are positioned between a magnet arrangement. The magnet arrangement includes stacked magnet pairs positioned between pole pieces to focus magnetic flux.

Abstract: An exemplary embodiment of the present disclosure may provide a sound generator which is connected to a vehicle body and generates sound, the sound generator including: a magnetic circuit generating vibration; a yoke contacting an upper surface of the magnetic circuit; an elastic member contacting at least a part of an upper surface of the yoke and performing vibration motion; a housing including an internal space formed as upper and lower sides of the housing are opened and lateral sides of the housing are closed; and a coil receiving an alternating current signal provided from the outside, wherein the coil is positioned in the internal space of the housing, wherein the sound generator transmits the vibration generated by the magnetic circuit to the vehicle body and vibrate at least a part of the vehicle body such that sound is generated from the vehicle body.

Abstract: A loudspeaker, includes a front cover; a frame forming an accommodation space together with the front cover, the frame including a side wall; a vibration system accommodated in the accommodation space; and a magnetic circuit system accommodated in the accommodation space. The magnetic circuit system includes a yoke and a magnet disposed on the yoke, and the yoke includes a support plate and a bending wall extending perpendicularly from an edge of the support plate. Some gaps are formed between the bending walls and the side wall of the frame for containing glue, and the side wall forms a plurality of lockholes communicated with the gaps.

Abstract: The present invention discloses a sound transducer with a ventilation structure capable of securing a flow path of air introduced from within and outside of the sound transducer to the maximum. The sound transducer with a ventilation structure includes a frame, a magnetic circuit installed within the frame, a voice coil vibrating according to mutual electromagnetic force with the magnetic circuit upon receiving an electrical signal, a vibration plate vibrating according to vibrations of the voice coil to generate a sound, and a drain hole formed to be adjacent to the corner of the frame and allowing air to flow between the interior and exterior of the frame.

Abstract: A loudspeaker unit comprising a loudspeaker housing and a first and a second loudspeaker, wherein the two loudspeakers are both placed in a flat front wall of the loudspeaker housing, the rear side of the first loudspeaker adjoins a first space in the loudspeaker box and the rear side of the second loudspeaker adjoins a second space in the loudspeaker box, and the first and the second space in the loudspeaker box are separated by a wedge-shaped body, the base of which is connected to a wall placed opposite the front wall and the intersection between the sloping surfaces of which is located in the vicinity of the front wall, wherein the wedge has a length in the direction transversely of the plane of the front wall that is at least twice the distance between the sloping surfaces at the position of the base of the wedge-shaped body.

Abstract: [Object] To lower a mechanical resonance sharpness and reduce oscillations near a minimum resonance frequency, to thereby improve the sound quality.

Abstract: A shaker transducer is disclosed, which comprises a magnetic unit (1) composed of a magnet (3) disposed between a first polar plate (2) and a second polar plate (4) in such a way to generate a toroidal air gap (5). A sound coil (6) is disposed in the air gap (5) to move axially and a centering element (100) is fixed to the coil to maintain it centered with respect to the magnetic unit (1). A rigid element (10) comprising a shank (12) fixed to said cylindrical support (61) of the sound coil and adapted to be anchored to a surface to transfer the sound vibrations generated by the magnetic unit (1). The centering element (100) comprises a central cylindrical shank (101) fixed to the coil, a peripheral shank (102) fixed to the second polar plate (4) and a plurality of elastic spokes (103, 103?) disposed between said central shank (101) and said peripheral shank (102).

Abstract: A loudspeaker includes an outer frame with an annular magnet partially exposed from a bottom thereof; a voice coil located inside the annular magnet; a diaphragm glued to between an expanded front opening of the outer frame and the voice coil; a flexible suspension ring having an outer edge fixed to a stepped section of the outer frame and a central opening edge clearance-fitted to a middle/front portion of the annular magnet; and an inner frame having a front portion fitted around the voice coil, a rear portion located on the central opening edge of the flexible suspension ring, and legs extended between the front and rear portions to locate in front of slots formed on the annular magnet. Therefore, the loudspeaker has reduced depth and volume, increased vibration amplitude and stability, and high quality sound output.

Abstract: A bobbin includes a stratiform composite structure. The stratiform composite structure includes an amorphous carbon structure and a carbon nanotube film structure composited with the amorphous carbon structure. The amorphous carbon structure and the carbon nanotube film structure are combined by van der Waals attractive force and covalent bonds therebetween.

Abstract: A speaker includes a frame, a diaphragm disposed in a top end of the frame of the speaker and a bobbin disposed below the diaphragm. A voice coil is wound around a bottom end of the bobbin and a magnetic member, which has a groove in which the bottom end of the bobbin around which the voice coil is wound, is inserted and reciprocated in a straight line upward and downward. A central pillar is fixed to the magnetic member at a center of the bobbin and extends parallel to the movement of the bobbin. A damper supports an inner circumferential surface of the bobbin from the central pillar. The damper additionally supports an outer circumferential surface of the bobbin, from the frame, so as to allow the bobbin to reciprocate in a straight line. This results in minimization of wobble and distortion, so that accurate sound is generated.

Abstract: Systems, methods, and devices for providing high quality speaker performance in a small-scale design are disclosed. In accordance with various embodiments of the present invention, a small-scale speaker assembly is provided which is capable of delivering high-fidelity wideband audio. The speaker assembly includes a speaker driver and a number of electronic components within an enclosure. In some embodiments at least one microphone is included in the assembly. In some embodiments the speaker assembly is well suited for audio conferencing. In some embodiments low-frequency performance is improved in a small-scale design.

Abstract: The present invention is to provide a loudspeaker, which includes a frame having a through hole centrally provided at a bottom side thereof, a coil tube with a coil unit fixedly mounted around the outer periphery thereof and having a first end fixed to the through hole and a second end received in a receiving space of the frame, a diaphragm attached to periphery of an opening of the frame, and a plurality of oppositely oriented magnetic elements fixed on the diaphragm, wherein every two adjacent magnetic elements are spaced apart by an appropriate distance, and the magnetic elements are located in the coil tube at positions that magnetic lines generated by the coil unit are highly concentrated. Since vibration of the magnetic elements caused by the magnetic forces generated from the coil unit is enhanced, output power of the loudspeaker will increase accordingly.

Abstract: In a speaker, a space surrounded by a frame on one side of a diaphragm is separated by a damper into a first internal space and a second internal space. The first internal space and the second internal space are caused to face one part and another part of an opening provided in the frame. A duct protrudes from the frame, and the opening is an open end of the duct on the base end side thereof. The speaker is installed, for example, outside a vehicle cabin with the duct inserted into an opening in a vehicle cabin wall, and the first and second internal spaces are caused to communicate with a space in the vehicle cabin through the duct. Therefore, reproduced sound in the bass range having a high sound pressure can be discharged through the duct to the space in the vehicle cabin.

Abstract: A damper includes at least one matrix and at least one carbon nanotube structure disposed on at least one surface of the at least one matrix. A loudspeaker using the damper is also disclosed. The loudspeaker includes a frame, a diaphragm secured on the frame, a bobbin having a voice coil, and a damper. The bobbin is secured to the diaphragm. The damper has a first engaging surface engaged with the frame and a second engaging surface engaged with the bobbin.

Abstract: A damper has ridges and furrows thereon and a through hole therein. The damper includes a carbon nanotube film structure and an amorphous carbon structure. The carbon nanotube film structure defines a number of micropores therein. The amorphous carbon structure is composited with the carbon nanotube structure. The amorphous carbon structure comprises a number of amorphous carbon particles received in the micropores.

Abstract: A speaker system includes: a baffle board having a first attachment portion, a second attachment portion, and a third attachment portion; a diaphragm, which is exposed to a front face side of the baffle board; an edge, which is disposed on an outer circumference of the diaphragm and is fixed to the first attachment portion to support the diaphragm; a magnetic circuit holding member, which is configured to be fixed to the second attachment portion so that a magnetic circuit is holed at a rear face side of the diaphragm; and a damper, which is disposed at the rear face side of the diaphragm and is fixed to the third attachment portion to support the diaphragm.

Abstract: A vibration device includes a support system member that supports a diaphragm to allow vibration, a tubular voice coil bobbin attached to the diaphragm, and a magnet disposed on at least one of inner and outer circumferential surface sides of the bobbin. The magnet is polarized in a vibration direction of the diaphragm, and forms a magnetic gap on a side that faces the bobbin. A voice coil is attached to the bobbin and disposed within the magnetic gap, and vibrates the diaphragm and the bobbin in response to a driving force generated when an electrical signal is inputted into the voice coil. A magnetic material member is attached to the bobbin, disposed in a balancing position within the magnetic gap, and, when vibrating with the bobbin, subjected to a magnetic attractive force in a direction away from the balancing position.

Abstract: To propose a speaker unit and a speaker apparatus enabling to improve the strength of a voice coil bobbin and sound output in high quality with a simple structure, there are provided that a magnetic circuit forming a magnetic gap in slit form, a frame for storing and holding the magnetic circuit, a diaphragm attached to be vibratable to the frame, a flat-type voice coil bobbin disposed so as to pass through the almost center of the magnetic gap, in that its one end is combined with the diaphragm, a voice coil is adhered to its surface, and convex and concave parts for improving the strength of the diaphragm in the vibrating direction are formed on the surface, and a damper attached to the frame to support the other end of the flat-type voice coil bobbin.

Abstract: The present invention relates to a loudspeaker in the acoustic field and the information communication field. The invention provides a loudspeaker that can realize a thinner size. To achieve this, the loudspeaker of the present invention is structured so that a part of a diaphragm is inserted to a dent or an opening formed at the center poles of a lower plate of a magnetic circuit. This structure allows the diaphragm to be stored within the height of the magnetic circuit, thus allowing the loudspeaker to have a thinner size.

Abstract: A spider for high-power, compact electro-acoustic transducers comprises a non-woven fiber blend encased in a thermoplastic elastomer. The spider is capable of supporting the longer stroke distances of the high-power, compact electro-acoustic transducers and exhibits improved fatigue and ageing resistance.

Abstract: A shaker transducer is disclosed, which comprises a magnetic unit (1) composed of a magnet (3) disposed between a first polar plate (2) and a second polar plate (4) in such a way to generate a toroidal air gap (5). A sound coil (6) is disposed in the air gap (5) to move axially and a centering element (100) is fixed to the coil to maintain it centered with respect to the magnetic unit (1). A rigid element (10) comprising a shank (12) fixed to said cylindrical support (61) of the sound coil and adapted to be anchored to a surface to transfer the sound vibrations generated by the magnetic unit (1). The centering element (100) comprises a central cylindrical shank (101) fixed to the coil, a peripheral shank (102) fixed to the second polar plate (4) and a plurality of elastic spokes (103, 103?) disposed between said central shank (101) and said peripheral shank (102).

Abstract: A speaker includes a frame, a diaphragm disposed in a top end of the frame of the speaker and a bobbin disposed below the diaphragm A voice coil is wound around a bottom end of the bobbin and a magnetic member having a groove in which the bottom end of the bobbin around which the voice coil is wound, is inserted and reciprocated in a straight line upward and downward A central pillar is fixed to the magnetic member at a center of the bobbin and extends parallel to the movement of the bobbin. A damper supports an inner circumferential surface of the bobbin from the central pillar. The damper additionally supports an outer circumferential surface of the bobbin, from the frame, so as to allow the bobbin to reciprocate in a straight line. Support of the bobbin by the damper in both lengthwise and width directions results in minimization of wobble and distortion, so that accurate sound is generated by the speaker.

Abstract: The present invention relates to a loudspeaker in the acoustic field and the information communication field. The invention provides a loudspeaker that can realize a thinner size. To achieve this, the loudspeaker of the present invention is structured so that a part of a diaphragm is inserted to a dent or an opening formed at the center poles of a lower plate of a magnetic circuit. This structure allows the diaphragm to be stored within the height of the magnetic circuit, thus allowing the loudspeaker to have a thinner size.

Abstract: A damper for a speaker for vibratably supporting a voice coil to a static part includes a first damper and a second damper formed in an annular shape having an inner periphery part and an outer periphery part, respectively. The first and second dampers are formed in a shape expandable and contractable in a direction crossing a circumferential direction of the annular shape. The inner periphery part of the second damper is connected to the first damper between the inner periphery part and the outer periphery part of the first damper, and each outer periphery part of the first damper and the second damper is connected to each other such that annular space is formed between the first damper and the second damper.

Abstract: A slim speaker includes a casing having an enlarged front opening and a rear end with a magnetic circuit mounted thereto; a voice coil located over a central area of the magnetic circuit; a diaphragm located between the enlarged front opening of the casing and the voice coil; and a damper located behind the diaphragm to space from the latter. The diaphragm has at least one V-shaped bent section provided at a middle portion for bearing on a corresponding position on the damper. With these arrangements, the diaphragm not only has an effectively reduced overall height to largely reduce the assembled volume of the slim speaker and allow the slim speaker to be easily mounted in the limited inner space of an electric product, but also stabilizes the vibration of the voice coil to enable good resonance of sound.

Abstract: The present invention relates to a damper of a rectangular-shaped slim speaker that is capable of preventing a vibration plate having an entire outer appearance of a slim oval/track-like shape extended to any one side thereof from being moved in forward and backward directions. The damper of a rectangular-shaped slim speaker includes: fixed end portions formed on either end thereof, respectively, to face each other in a vertical direction; support plate portions each extended backwardly from the fixed end portions; and an elastic portion extended backwardly from the support plate portions, wherein the fixed end portions, the support plate portions, and the elastic portion are formed integrally as an injection molded plastic product.

Abstract: A magnetic circuit part of a loudspeaker is formed of a plate, a magnet, and a yoke. A step is disposed in the plate that comes into contact with a disc-like magnet and forms a magnetic gap. A loudspeaker is provided where the step moves a voice coil away from the leakage magnetic field of the yoke, the influence of the leakage magnetic field is eliminated even when the output is large, the distortion is small, and the sound quality is high.

Abstract: A drive cone 11 and a diaphragm 14 are integrally driven by a voice coil 6 movably disposed in a magnetic gap 5. Peripheral edge portions of the drive cone 11 and the diaphragm 14 are supported by a frame 12 via different edge portions 13 and 15, respectively. The drive cone 11 is provided with a rising-up portion 11a which rises up toward an acoustic radiation direction from a inner circumferential end, and a rising-down portion 11b which rises down toward a direction reverse to the acoustic radiation direction. An inner circumferential edge of the diaphragm 14 is fixed at an annular top formed between the rising-up portion and the rising-down portion. Moreover, a first rib 11c and a second rib 11d are formed on the drive cone 11 in such a manner as to rise up toward the acoustic radiation direction integrally with the drive cone. The diaphragm 14 is supported also at the tips of the ribs.

Abstract: A miniature receiver or transducer with improved viscous damping. The receiver may be a moving armature receiver using shearing forces for damping the deflection of the diaphragm. In this receiver, the damping element, which may be a liquid, extend in a direction of the deflection of the armature or diaphragm. Another embodiment relates to a transducer where the damping element engages the diaphragm.

Abstract: A voice coil 6 is movably disposed in a magnetic gap 5. A drive cone (first diaphragm) 11 and a diaphragm (second diaphragm) 14 are integrally driven by the voice coil 6. Peripheral edge portion of the drive cone 11 and the diaphragm 14 are supported by a frame 12 through edge portions 13 and 15, respectively. An annular adhesive receiver 8 is disposed in a peripheral surface of a voice coil bobbin 7 around which the voice coil 6 is wound, and an inner peripheral edge 11a of the drive cone 11 is accommodated in the adhesive receiver 8. The drive cone 11, the adhesive receiver 8 and the voice coil bobbin 7 are connected to each other by an adhesive filled into the adhesive receiver 8.

Abstract: There is provided an elongated loudspeaker having high sound quality that is unlikely to cause break-up resonances and is capable of obtaining flat frequency characteristics. The loudspeaker includes: an elongated flat-plate-shaped diaphragm; a frame having an opening portion larger than the diaphragm; an edge placed between an inner periphery of the frame around the opening portion and an outer periphery of the diaphragm and supporting and allowing the diaphragm to easily vibrate in an emission direction of sound waves; a coupling cone extending from a rear surface of the diaphragm and including two elongated portions arranged parallel to a longitudinal direction of the diaphragm, the coupling cone vibrating in conjunction with the diaphragm; a voice coil wound around at least the two elongated portions; and a magnetic circuit that imparts, to the voice coil, driving force for generating sound waves.

Abstract: A transducer comprising a pair of spaced magnets at least partially forming a tunnel having a central axis. A coil having a first and a second side wall and an upper and a lower wall at least partially forms the tunnel. A reed having a central portion extends through the tunnel. The reed has a stationary end, a deflection end, and a tip portion which lies at least partially between the magnets, wherein the reed is mounted for deflection towards or away from the respective magnets.

Abstract: A speaker device including a diaphragm, a static part vibratably supporting the diaphragm, and a driving part provided at the static part and vibrating the diaphragm upon an audio signal. The driving part includes a voice coil vibrating in a direction different from the diaphragm upon the audio signal inputted, a magnetic circuit including a magnetic gap in which the voice coil is arranged, a rigid vibration direction converter part obliquely disposed with respect to the vibration direction of the voice coil and the diaphragm, and connected with the voice coil and the diaphragm, and a holding part holding the voice coil at the static part. The holding part restricts the vibration of the voice coil in one axis direction.

Abstract: A speaker device has a magnet, outer yokes, and inner yokes which are assembled so that a magnetic gap is formed between the outer yoke and inner yokes over which a magnetic flux which is generated from the magnet cuts across. A voice coil unit which is linked to a diaphragm is disposed within the magnetic gap, and positioning members determine the positions of the inner yokes and the outer yokes which attach magnetically to the magnet such that a magnetic gap is formed. The speaker device has a magnetic circuit of which the construction facilitates assembly, and recycling of various individual parts is relatively easy.

Abstract: An exciter apparatus outputs a sound by vibrating an interior material of a vehicle. The exciter apparatus includes a base part attachable to the interior material, a magnetic circuit generating a magnetic field in a space between a permanent magnet and a magnetic body member, a voice coil fixed to the base part and located in the space, and a damper part which is elastically deformable, is formed outside an outer circumference of the base part, and is connected to the magnetic body member.

Abstract: The invention provides a speaker damper (50) which can realize improvement of the productivity of a dynamic speaker (1), and a speaker (1) including the speaker damper. In the damper (50), lead portions (52) for guiding voice coil lead wires (21b) to external connection terminals (30) while laying the lead wires on one surface is disposed, and the process of laying the voice coil lead wires (21b) by means of forming is realized not in the air of the interior of a frame (60), but on one surfaces of the lead portions (52).

Abstract: The present disclosure provides a damper. The damper has alternating ridges and furrows thereon and has a through hole defined at a center of the damper. The ridges and furrows are concentric. The damper includes a matrix and at least one carbon nanotube structure disposed in the matrix. The present disclosure also provides a loudspeaker using the damper.

Abstract: A magnetic circuit for a speaker device includes a yoke having a pole piece main body formed into a cylindrical shape or a hollow cylindrical column shape, and a flange part provided on an outer side thereof, a magnet arranged on the flange part, a plate arranged on the magnet, and an annular T-shape forming member arranged on the pole piece main body. A magnetic gap is formed between an inner peripheral wall of the plate and an outer peripheral wall of the T-shape forming member. A configuration formed by combining the T-shape forming member and the pole piece main body forms a T-shaped pole piece.

Abstract: A damper 8 supports a yoke portion 16, 17 holding a magnet 18 therein. The damper 8 includes an annular yoke retainer portion 8a holding the yoke portion, a plurality of support portions 8b projecting radially outward from the yoke retainer portion 8a, a plurality of suspension spring portions 8c extending from each of the plurality of support portions 8b to an adjacent support portion along a periphery of the yoke retainer portion 8a, and a plurality of T-shaped projections 8T provided on an end of each of the plurality of suspension spring portions 8c. The plurality of T-shaped projections 8T are respectively fitted in notches K in a case so that the yoke portion 16, 17 is movable relative to the case. Because the damper 8 can be fixed to the case without any screws, the electromechanical vibration converter can readily be assembled and produced in a speaker manufacturing line.

Abstract: An improved structure of a speaker comprises a speaker frame disposed with a yoke at a lower end, the yoke is disposed with a magnet that is sleeved with a voice coil pipe; a lower damper is sleeved onto the voice coil pipe through a hole, with an outer edge of the damper attached to the outer edge of the bottom inside the speaker frame; a washer is overlapped at the outer edge of the lower damper, then an upper damper is sleeved onto the voice coil pipe through a hole, with its outer edge attached to the washer; two cones are hooked up and attached to each other with a hole of the two cones sleeved onto the voice coil pipe, and an outer edge of a cone surround is attached to a rim of the speaker frame to form the improved structure of the speaker.

Abstract: A dual loop speaker having a low profile is disclosed to include a bracket holding a magnet and a U-yoke around the magnet, a damper connected between the bracket and the U-yoke, a cone paper connected between the bracket and the damper and having an inside step, a dust cover bonded to the inside step of the cone paper, a sound coil mounted inside the dust cover and sleeved onto the magnet with the periphery thereof connected to the dust cover, and a tweeter mounted inside the sound coil. When electric current is connected to the sound coil to excite the magnet, the sound coil is cause to vibrate the cone paper and the damper, and the vibration of the cone paper causes sound. Because the sound coil is provided above the cone paper, the height of the speaker is minimized.

Abstract: A damper structure for a speaker is provided to preventing irregular vibrations, and the improvements comprises the damper having one or more elastic reinforcing pieces attached with a corrugated surface of the damper. The reinforcing pieces may be of smaller annular strips, larger annular strips, or straight strips corresponding to and attached to the corrugated surface of the damper in its inner region, outer region, and in its radial direction and preferably in equiangular distribution, respectively, to strengthen its structural strength and uniformity.