Abstract: Disclosed herein is a linear vibration motor including: a stator part including a flexible printed circuit board (FPCB) having a coil fixedly coupled to an upper portion thereof; a vibrator part received in an inner portion of the stator part and including a vibration motor generating independent vibration in a linear direction and a magnet fixedly coupled to an outer peripheral surface of the vibration motor; and an elastic member having an upper end portion coupled to an upper surface of an inner side of the case and a lower end portion coupled to an upper portion of the vibrator part to thereby elastically support vibration force generated in the vibrator part.

Abstract: Actuator apparatus having a drive element (26) which can tilt and/or pivot in a predetermined manner in response to electrical activation and which is formed such that it can be contacted by an output partner in order to transmit mechanical drive energy, wherein the drive element, as a connection element, is operatively connected to two expansion units (10, 12; 40, 42), which are formed by means of magnetic shape-memory alloy material, such that the connection element executes a tilting and/or pivoting movement in response to an expansion or contraction movement of one of the expansion units, expansion or contraction movement being produced by the electrical activation and also a magnetic field which is generated by said electrical activation.

Abstract: A VCM is disclosed, the VCM including a bobbin formed with a coil at an outer surface thereof; at least one permanent magnet facing the coil formed at the bobbin; a cylindrical yoke encompassing the bobbin and the permanent magnet and including a metal member for blocking a magnetic field generated by the coil; a base coupled to the yoke; and an elastic member including a first elastic member interposed between the yoke and the permanent magnet for elastically supporting the bobbin and a second elastic member interposed between the base and the permanent magnet.

Abstract: An instantaneous magnetodynamic generator includes a magnetic plate and a first metallic electrode plate. The magnetic plate has at least one pair of N and S magnetic poles. One magnetic pole of the pair of N and S magnetic poles has a first magnetic pole face, and the other magnetic pole of the pair of N and S magnetic poles has a second magnetic pole face. The first metallic electrode plate has an electrode face and at least one metallic wire. The electrode face faces the first and second magnetic pole faces. The metallic wire has a free end moving between a position beneath the first magnetic pole face and a position beneath the second magnetic pole face to induce a positive or negative tunneling current on the first metallic electrode plate.

Abstract: A voice coil motor (VCM) is disclosed. The VCM includes a base formed with an opening; a movable body including a bobbin arranged on the base and formed with a hollow hole and a coil arranged along a periphery of the bobbin; a stator including a frame-shaped magnet arranged on the base, the magnet being discrete from the coil and wrapping a periphery of the coil; and a case covering an upper surface and an outer surface of the magnet, the case being coupled to the base.

Abstract: A diaphragm pump (1) having a diaphragm (11), a solenoid with a movable magnetic armature (8) as a drive element for the diaphragm (11), and a stop element (9) for adjusting the stroke for the drive element (8). The diaphragm pump includes at least one elastic damper (36) between the drive element (8) and the stop element (9), which elastic damper (36) has at least one compression chamber (26) which is surrounded and formed by at least one elastic boundary wall and by at least one rigid boundary wall of the drive element (8) and/or stop element (9).

Abstract: A magnetically actuated reciprocating motor utilizes the stored energy of rare earth magnets and an electromagnetic field provided by a solenoid to reciprocally drive a solenoid assembly. A converting mechanism, such as a connecting rod and crankshaft, converts the reciprocating motion of the solenoid assembly to power a work object. The solenoid assembly comprises a solenoid having a nonferromagnetic spool with a tubular center section and a coil of wire wrapped around the center section. A magnetic actuator has a permanent magnet at each end of an elongated shaft that is received through the center section of the spool. A switching mechanism switches magnetic polarity at the ends of the solenoid so the solenoid assembly is alternatively repelled and attracted by the permanent magnets. A controlling mechanism interconnecting an output shaft and the switching mechanism provides the timing to switch the polarity of the solenoid and reciprocate the solenoid assembly.

Abstract: A linear vibrator is disclosed. The linear vibrator includes a housing having a base and a cover, a number of elastic members connected to the housing, a vibrating unit suspended in the housing by the elastic members, and a coil positioned in the housing. The base has a bottom wall and a plurality of sidewalls extending vertically from the bottom wall. The vibrating unit has a magnet assembly and vibrates along a direction parallel to the bottom wall.

Abstract: A vibrator motor in a hair clipper has a stationary piece and a moving piece. The stationary piece has a primary leg and at least one secondary leg. The primary leg fits through an opening in a coil. A flange is then press fit onto the leg so that the coil is captured on the primary leg. The flange provides a magnetic pole face that is larger than the opening in the coil, which increases the efficiency of the motor. The flange is press fit in a single operation by pressing a primary prong into a primary socket, and pressing two secondary prongs into secondary sockets. The secondary prongs are guided inwardly as they enter the secondary sockets, which closes the primary socket around the primary prong. A drive arm is secured to an arm of the moving piece. The arm is angled in relation to the drive arm to put even pressure on the moving blade in the hair clipper.

Abstract: The invention relates to an electromagnetic drive (11), which is connected or can be connected to an open-loop control device or closed-loop control device (54) and together with the latter can form an electromagnetic drive installation. The electromagnetic drive (11) contains a hollow-cylindrical drive coil (12), in which an armature (14) can be driven in each case from one to the other of two end stations (26, 28) or back by an electromagnetic pulse of the drive coil (12). Holding means (40, 42), preferably permanent magnets, hold the armature (14) in the end station respectively reached until the electromagnetic pulse is generated once again.

Abstract: A wireless switch comprises a mechanical oscillator, a mechanical impulse deliverer, a first array of magnets positioned on a planar surface, a first conductor, and a power management circuit. The mechanical impulse deliverer delivers a mechanical impulse to the mechanical oscillator when the wireless switch is switched. The first array comprises a one dimensional or two dimensional array of magnets. The first conductor comprises a first serpentine conductor. The power management circuit provides DC power as a result of relative motion due to the mechanical oscillator between the first array of magnets and the first conductor.

Abstract: A magnetically actuated reciprocating motor utilizes the stored energy of magnets, particularly rare earth magnets, and an electromagnetic field to reciprocally drive a magnetic actuator. A converting mechanism, such as a connecting rod and crankshaft, converts the reciprocating motion of the magnetic actuator to rotary motion for powering a work object. A solenoid, comprising a nonferromagnetic spool having a tubular center section with a coil of wire wrapped around the center section, is connected to a source of power and a switching mechanism. The switching mechanism switches the magnetic polarity at the ends of the solenoid to alternatively repel and attract permanent magnets at the ends of the magnetic actuator. A shaft interconnecting the magnets is received through the center section of the solenoid. A controlling mechanism interconnecting an output shaft and the switching mechanism provides the timing to switch the polarity of the solenoid to drive the magnetic actuator.

Abstract: The electrical generator allows energy to be recovered and stored from a rotating wheel, cam, gear or the like. The electrical generator includes at least one hollow tube mounted radially on a wheel rim. The wheel rim has a central portion and a circumferential edge, and the hollow tube has opposed first and second ends, respectively positioned adjacent the central portion and the circumferential edge of the wheel rim. At least one first elastic member and at least one second elastic member are mounted within the hollow tube and respectively cover the first and second ends thereof. At least one magnet is slidably received within the hollow tube, and at least one induction coil is mounted about an exterior surface of the hollow tube. An AC to DC converter is in communication with the induction coil, and an electrical battery is in communication with the AC to DC converter.

Abstract: Provided are a lens driving motor and an elastic member of the lens driving motor. The elastic member of a lens driving motor, the elastic member includes a first spring and a second spring. The second spring is different from the first spring and disposed together with the first spring on one side of a carrier to support the carrier. A first lead line of a coil and a first external power source are connected to the first spring, and a second lead line of the coil and a second external power source are connected to the second spring to supply power to the coil. Since the carrier can be assembled to other part after a (+) lead line and a (?) lead line of the coil are connected to the first and second springs, respectively, using solder, a process is simple and convenient.

Abstract: An electromagnetic, reciprocating linear motor or alternator having at least two armatures that are adjacent along an axis of reciprocation. The armatures have gaps that are linearly aligned along a gap path parallel to the axis. Field magnets reciprocate within the gap path. The field magnets include a main field magnet associated with each armature, each main field magnet having a magnetic polarization in the same direction across the gap path. A secondary magnet provides a centering spring force and is interposed between the main magnets. The secondary magnet extends in an axial direction from within a gap of one armature core to within an adjacent gap of an adjacent armature core. The secondary magnet is magnetically polarized in a direction opposite the polarization of the main magnets.

Abstract: An AMPG device for generation of electrical energy, including a bobbin, at least one magnet, and at least one spring member. The magnet is arranged to be movable together with the spring member. The device is arranged so that when exposed to an acceleration component in a possible path of mobility of the first magnet, the first magnet will, due to its association with the spring member, move in an oscillating manner in relation to the bobbin, so as to generate electrical energy. The device is arranged to at a limiting position of the mobile magnet's path of mobility a spring member with an equal or higher spring constant than the remainder portions of the magnet's mobile path acting on the magnet. An AMPG device assembly includes several AMPG devices. A method to optimize the electrical output of the device adapts the device to the frequencies appearing in the application where it shall be used.

Abstract: A horizontal linear vibrator includes: a bracket providing an internal space; a vibration unit mounted in the internal space and making a horizontal, linear movement; a magnetic field unit providing an electromagnetic force to allow the vibration unit to move horizontally; and a cover unit formed to cover an upper portion of the bracket, wherein the bracket includes a support plate part so as to support the vibration unit to make a horizontal, linear movement, and the cover unit is formed to overlap with the support plate part.

Abstract: In one embodiment, a system for providing cyclic motion includes a magnetic drive having an electrically conductive coil defining a bore and a magnetic member movable through the bore. A control provides current to the coil and selectively reverses the direction of the current to move the magnetic member through the bore. In another embodiment, the system includes a counterbalance. The counterbalance includes a biasing member for reacting against a load applied to a support, and a lever arm coupled to the biasing member for varying a preload of the biasing member. In another embodiment, the magnetic drive and the counterbalance may be incorporated into an apparatus for reciprocating a person.

Abstract: A linear vibrator is disclosed. In accordance with an embodiment of the present invention, the linear vibrator includes a base, a coil unit, which is coupled to the base, a magnet, which is coupled to the coil unit such that the magnet can move relatively with respect to the coil unit, and a leaf spring, which is interposed between the magnet and the base and includes a plurality of plate-shaped members having center portions thereof being separated from one another and both respective ends thereof being coupled to one another. Thus, the linear vibrator can increase the range of displacement in the leaf spring and increase the magnitude of vibration in the linear vibrator.

Abstract: A linear vibrator is disclosed. The linear vibrator in accordance with an embodiment of the present invention includes a base, a coil unit, which is coupled to the base, a magnet assembly, which forms a closed circuit of a magnetic force perpendicular to an electric current flowing through the coil unit and in which the magnet assembly relatively moves with respect to the coil unit, and an elastic member, which elastically supports the magnet assembly. Thus, a linear vibrator with an increased driving force can be provided by preventing the leakage of magnetic flux.

Abstract: A reciprocating motor and a reciprocating compressor having the same are provided. One side of each of outer and inner cores forming a stator are connected to each other, to prevent a magnetic flux generated by the coil and a magnet from leaking out of the stator. Hence, it is possible to fabricate components of the reciprocating compressor employing such a reciprocating motor by using a relatively low-cost magnetic substance, resulting in a decrease in fabricating costs of the compressor. Also, a length of the magnet may be reduced, which results in a reduction of the cost for the magnet, thereby decreasing fabricating costs of the reciprocating motor and the reciprocating compressor employing the reciprocating motor.

Abstract: The drive system for a personal care appliance, such as a toothbrush, includes a first opposing pair of permanent magnet assemblies positioned longitudinally along the length of the internal surface of a cylindrical appliance housing, each first permanent magnet assembly having one portion with a north polarity and the other portion a south polarity, and a second pair of permanent magnet assemblies which are orthogonal to the first pair of permanent magnet assemblies, one second permanent magnet assembly having a plurality of abutting first parts along the length thereof, the parts alternating between a north polarity and a south polarity, the other second permanent magnet assembly having similar parts with reversed polarity. First and second armatures are mounted on, or a portion thereof forms, a spindle element which extends along the length of and outward from the cylindrical housing.

Abstract: An energy harvesting apparatus, for deployment on a vehicle, comprises a vehicle shock absorber including a dust tube, and a damper tube telescopically mounted within the dust tube and configured for oscillating translational movement with respect thereto. A magnet is fixedly coupled to one of the dust tube or the damper tube, and a coil is fixedly coupled to the other of the dust tube or the damper tube to achieve relative translational movement between the magnet and the coil to induce a current in the coil.

Abstract: A spring-less buried magnet linear-resonant motor is provided. The motor includes a buried magnet system and a stator operable to produce an alternating magnetic field exerting alternating axial forces on the buried magnet system that has a self-centering force and a required stiffness to reciprocate at a frequency near an alternating current (AC) supply frequency.

Abstract: A vibration actuator includes a coil that extends in a vibration direction and has a flat shape and a magnet that extends in the vibration direction and has a flat shape, so that a case can be made flat or low profile. A weight portion is supported by a shaft, so that, when a drop impact is applied, the weight portion can move along the shaft and the weight portion is not freely moved in the case. A coil spring is disposed between a spring receiving portion and a weight portion. Therefore there is no unnecessary space in the case, so that space can be saved and the vibration actuator can be made compact.

Abstract: A vibration motor includes a first resilient member and a second resilient member providing resilient forces in opposite directions; a first vibrator and a second vibrator coupled to the first resilient member and the second resilient member respectively; a magnetic body coupled to the first vibrator to create a magnetic field; and a coil applying a current of a predetermined frequency band in the region where the magnetic field is created.

Abstract: Disclosed herein is a horizontal linear vibrator. The horizontal linear vibrator includes: a case and a bracket that are assembled with each other to form an inner space; a hollow coil that is installed in the case or the bracket; a vibrator that includes a magnetic field unit including one or more magnet disposed to penetrate through the inside of the hollow coil and a yoke formed to enclose the hollow coil and the magnets to generate magnetic field and a weight mounted in the magnetic field unit; a buffer member that is provided between the hollow coil and the yoke; and a spring member whose one end is fixed to the case or the bracket and other end is fixed to the vibrator and elastically supports the vibrator so as to horizontally move the vibrator.

Abstract: The present invention replaces the internal combustion engine utilizing a conventional 12 voltage system that is used in automobiles today. The combustion engine can be a 90 degree V-Type or Inline type of cylinder block. This magnetic drive engine of the present invention comprises a head assembly supported by a cylinder engine block. The cylinder block houses the pistons and the head assembly houses a plurality of corresponding plug assemblies. Each plug assembly has an electromagnet on its bottom end which switches polarity based upon the polarity sent by the sensors on the crankshaft. By integrating the mechanics and the electromagnetism needed to push and pull the magnets on the pistons, the plug assembly is a staging area, for the coils and rods (mediums), to initiate the changing of polarity. A computer controls the switching of polarity and voltage needed for top performance.

Abstract: An electromagnetic energy transducer configured to convert mechanical energy into electrical energy comprises two magnetic elements including a permanent magnetic element and a soft-magnetic element and an electrical coil. The permanent magnetic element and the soft-magnetic element are arranged to form a magnetic circuit and one of the two magnetic elements is movable in relation to the other of the two magnetic elements. The electrical coil surrounds a part of the soft magnetic element. The movable magnetic element is held in a first position by a spring force and moved into a second position by applying an external mechanical force exceeding the spring force, and at the first position the magnetic flux within the soft magnetic element is different than the flux at the second position.

Abstract: Disclosed herein is a linear vibration motor. A stator includes a coil which forms a magnetic field using an external power applied thereto. A vibrator includes a magnet which faces the coil, and a yoke which has a coupling part. The magnet is coupled to the coupling part. An elastic member has a first end coupled to the stator, and a second end coupled to the yoke. The elastic member elastically supports linear vibration motion of the vibrator. The coupling part has a plurality of openings therein so that an electromagnetic force generated by electromagnetic induction of the magnet and the coil leaks out through the openings.

Abstract: Methods and apparatus for increasing the efficiency of a voice coil motor (VCM) are disclosed. According to one aspect of the present invention, a cylindrical and radially symmetric VCM includes a plurality of sets of magnets, and a single coil. The plurality of sets of the magnets are each arranged in an array configuration, and cooperate to form a magnetic field. The coil receives current and has a plurality of windings. A first space is defined within the coil, and the plurality of sets of the magnets are arranged such that a first set of the magnets is positioned within the first space and a second set of the magnets is positioned external to the coil.

Abstract: The present invention relates to a linear motor for a linear compressor reciprocating a moving member linearly inside a stationary member to compress refrigerant, and more particularly, to a linear motor for a linear compressor capable of decreasing an iron loss of a flux generated when a current flows in a coil and increasing an inductance. A linear motor for a linear compressor includes an inner stator formed by stacking core blocks in a circumference direction to be insulated from each other, an outer stator formed by arranging core blocks in a circumference direction at a predetermined intervals, and winding a coil around the core blocks, and a plurality of permanent magnets formed between the inner stator and the outer stator with a predetermined gap, and reciprocated linearly due to a mutual electromagnetic force.

Abstract: A new approach to achieving greater fuel efficiencies in the design and implementation of hybrid automotive vehicles. Efficiency and power benefits accrue from the integration of electric motor components into various components of combustion-fueled engines, thus obviating the need for much separate equipment, such as discrete electric motor(s) and gear arrangements in order to obtain hybrid operation. Among other things, a significant savings of weight in the vehicle and increased control of the coordination between combustion-fueled and electric motor propulsion of the vehicle is obtained.

Abstract: A magnetic drive motor includes a housing; a plurality of cylinders bored in the housing, each cylinder having an upper end; a piston reciprocatingly received within each cylinder; a cylinder head covering the upper end of each cylinder; an electromagnet secured within each cylinder head; a source of electrical energy coupled with each electromagnet for delivering electrical energy to each said electromagnet; means for controlling delivery of electrical energy to each electromagnet such that when the electromagnet receives electrical energy, the electromagnet produces a magnetic force which impinges and attractive force upon the piston, urging the piston toward the electromagnet; and a magnetic shield within each cylinder, each magnetic shield actuatable between a first position shielding the piston from the magnetic force produced by the electromagnet and a second position exposing the piston to the magnetic force produced by the electromagnet.

Abstract: The present invention provides a horizontal linear vibrator which can increase vibration strength while at the same time guaranteeing a sufficiently long lifetime and satisfactory responsivity. The horizontal linear vibrator includes a casing, a bracket, a vibration unit and springs. The bracket and the casing form the internal space therein. A coil is provided above the bracket such that the center axis thereof is oriented in a horizontal direction. The vibration unit is disposed through the coil and comprises a magnetic field generating unit and a weight. The magnetic field generating unit includes a magnet assembly and a yoke. The magnet assembly has magnets which are provided on opposite sides of a magnetic body core such that the similar magnetic poles of the magnets face each other. The weight is mounted to the magnetic field generating unit. The springs are coupled to the casing or the bracket and elastically support the vibration unit.

Abstract: An energy harvester comprising: a substrate; two magnets coupled to the substrate in close proximity to each other with like magnetic poles facing each other creating a flux gap; a coil coupled to the substrate and disposed within the flux gap, wherein the coil and the magnets are coupled to the substrate such that substrate acceleration causes relative elastic motion between the magnets and the coil thereby exposing the coil to a changing magnetic flux; and a resonant frequency tuner coupled to the substrate and configured to adjust the resonant frequency between the coil and the magnets.

Abstract: Disclosed herein is a linear vibration motor. The motor includes a casing surrounding the top and widthwise side of the motor, and a bracket surrounding the bottom and lengthwise side of the motor. A plate is provided on an inner surface of a side of the bracket and integrally has a cylindrical part to accommodate a coil. A mass body is provided in a central portion of the bracket and vibrates horizontally, a yoke is provided on a side surface of the mass body, and a magnet is mounted to a central portion of the yoke to be inserted into an internal space of the coil. A spring couples the plate with the yoke, thus transmitting vibratory force to the motor. An extension part extends from an end of the spring, and a bearing is provided on an end of the extension part, thus minimizing friction with the casing.

Abstract: In a compressor, a motor includes a stator and a moving member that reciprocates. A frame supports the stator and a conductivity member flows at least a portion of magnetic flux flowing away from the stator back to the stator. Accordingly, the reciprocating compressor has enhanced energy efficiency.

Abstract: A linear compressor includes a cylinder part with a cylinder bore. A piston is disposed in the bore and slidable therein. A main spring connects the cylinder part to the piston. A connecting member connects between the main spring and the piston. The connecting member passes through the air gap of a stator of a linear electric motor. At least one armature pole of the motor is located along the connecting member. The stator comprises a plurality stator parts opposed across the air gap. The cylinder part includes a tapered clamp for each stator part. The tapered clamp widens outward from the air gap. Each stator part has a matching taper and is engaged in the tapered clamp.

Abstract: A vibration generator 1 has an attachment structure of a spring by which the attachment error of the spring elastically supporting a mover composed of a magnet and a yoke does not become the error of the span of the spring to make it possible to improve the ease and yield of manufacture. The vibration generator 1 includes a mover which is composed of a magnet 5 and yokes 4, 7a and 7b, and a spring 6 which is composed of an integrally molded article made of an elastomeric material and elastically supports the mover to allow the mover to vibrate in the central axis direction C. The spring is arranged on the outside of a coil 3 in a radial direction thereof and extends along the radial direction.

Abstract: An electrical linear motor for propelling a marine vessel through a liquid medium, comprises a housing secured to the marine vessel and submerged in the liquid medium, an insert within the housing and having at least two electrical coil windings disposed on internal walls of the insert; a thruster subassembly moves between the internal walls of the insert, the thruster subassembly having a front cover, an internal channel with check valve and at least two sets of permanent magnets attached to the thruster subassembly and maintained in sufficiently close proximity to the electrical coil windings so that an electromagnetic field created by a controlled energizing of the electrical coil windings interacts with a magnetic field from the permanent magnets to provide a resulting linear force, which causes a reciprocating linear motion of the thruster subassembly, wherein the check valve is in an open position during a back stroke of the thruster subassembly so that the liquid medium flows freely through the thruste

Abstract: A converter converts mechanical energy of a piston to and from electrical energy during each piston cycle.

Abstract: An electromagnetic actuator includes a stator and a movable body. The stator includes a core provided with magnetic poles and a coil wound on at least one of the magnetic poles. The movable body includes a permanent magnet and supported in such a manner as to make reciprocating in a direction perpendicular to a direction in which the permanent magnet opposes the magnetic poles. The movable body is reciprocated upon applying an alternating voltage to the coil. An electromagnetic actuator driving method for driving the electromagnetic actuator includes performing feedback control of the alternating voltage in which the alternating voltage is applied to the coil during a first half of a control period and in which an induced electromotive force generated in the coil during a second half of the control period is used as a control signal.

Abstract: Disclosed herein is a linear vibrator. The linear vibrator includes a casing defining an internal space. A vibratory unit is accommodated in the casing to vibrate up and down. A spring is mounted at an upper circumferential end thereof to an upper surface of the casing and secured at a lower end thereof to an upper portion of the vibratory unit, thus elastically supporting the vibratory unit. An annular locking ring has a larger outer diameter than an outer diameter of the vibratory unit and an outer diameter of the spring so that the upper circumferential end of the spring is locked to the casing through press-fitting. A bracket supports the casing and the vibratory unit, with a circuit board being mounted on the bracket.

Abstract: A magnetic force intensifying drive system for generating a large drive force, and that is arranged so that polarities of at least one of a movable magnet and stationary magnets may be inverted to achieve continuous rotary movement or back-and-forth movement of the movable magnet relative to the stationary magnets in which the movable magnet or the stationary magnets is/are provided with permanent magnets for intensifying magnetic force.

Abstract: Disclosed herein is a linear vibrator. The linear vibrator includes a stationary unit which has on an upper portion thereof a magnet generating a predetermined magnetic force and a yoke, and defines an internal space. A vibratory unit includes a coil mounted to face the magnet and applying an electric current, and a mass body. A spring is secured at a lower end thereof to the stationary unit and secured at an upper end thereof to the vibratory unit, thus elastically supporting the linear motion of the vibratory unit. A lubricating part is provided between an outer circumference of each of the magnet and the yoke and the coil, thus preventing noise and abrasion when the vibratory unit moves linearly, in addition to maintaining a vibration.

Abstract: An asymmetric folded spring flexure suspension system can enable an ultra-compact linear reciprocative device wherein a reciprocative mass suspended from a base by a single folded flexure assembly extends in a single generally radial direction perpendicular to the intended travel path. The folded flexure assembly can be configured as three side-by-side stacks of flexure strips of spring material, tied together at a “yoke-idler” end; at the opposite “working” end, a central stack of nominal width is tied to the mass, and, flanking the central stack, a pair of half-width stacks are tied to opposite sides of the base. In an embodiment for active vibration control, a cylindrical enclosure, of magnetically-permeable material and attached to the working end of the flexure assembly, contains a driver system including an internally-mounted pair of permanent magnets that provide a magnetic flux gap and also constitute the main portion of the mass.

Abstract: An electromagnetic vibrator is composed of vibration sheet, suspension edge, basin frame and magnetic return path system. The electromagnetic vibrator is prepared as connecting back surface of vibration sheet to voice coil being set in magnetic return path system, injecting the vibration sheet and suspension edge to be an integral unit, connecting suspension edge with basin frame by ultrasonic mode and connecting vice coil wire to terminal sheet on basin frame after the wire is connected by vibration sheet.

Abstract: Techniques for providing directional force induction in a handheld device for use in, e.g., personal navigation applications. In an exemplary embodiment, a magnetic element is provided on a mechanical support fixedly attached to a chassis of the handheld device. One or more conducting coils surround the support. Current is generated in the one or more conducting coils to accelerate the magnetic element relative to the support, causing a tactilely perceptible force to a user of the handheld device due to the recoil of the chassis from the movement of the magnetic element. In an exemplary embodiment, passive movement of the magnetic element due to, e.g., physical jostling of the handheld device, may be used to deliver energy back to the system for energy harvesting.

Abstract: The present invention provides a linear vibrator comprising a weight having an auxiliary magnet which is provided in a lower end of the weight and generates magnetic force with respect to the bracket. Therefore, a magnetic attractive force between auxiliary magnet and the bracket prevents undesirable fine vibrations and prevents the vibration unit from coming into direct contact with the casing.