Abstract: The invention relates to a tamping assembly for tamping sleepers (2) of a track (3), comprising a tamping unit (1) having a lowerable tool carrier (4) and oppositely positioned tamping tools (5), wherein each tamping tool (5) is connected via a pivot arm (6) to a squeezing drive (7) for generating a squeezing motion, and wherein a vibration drive (8) is provided for actuation of the tamping tools (5) with a vibratory motion. In this, it is provided that the vibration drive (8) comprises an electromagnetic actuator (11).

Abstract: Each of holders which holds a coil or a magnet used in a magnetic drive circuit, in a stacked manner in a first direction without causing rattling in an actuator (1), a first coil holder (65) of a first magnetic drive circuit (6), a second coil holder (75) of a second magnetic drive circuit (7), and a third coil holder (85) of a third magnetic drive circuit (8) are arranged in a stacked manner in a Z direction, and the first coil holder, the second coil holder, and the third coil holder are fastened in the Z direction by a restraining member (90). Thus, the first coil holder, the second coil holder, and the third coil holder can be arranged in a stacked manner in the Z direction without causing rattling. The restraining member is constituted by a first member (91) and a second member (92) having the same configuration, including size and shape.

Abstract: An electric hair clipper comprises a blade and a casing, consisting of an upper shell, a lower shell and a screen removable from the lower shell to leave the blade in evidence.

Abstract: A vibration actuator includes: a fixing body having N-fold (N is a natural number) of 2 of core pole parts and a coil wound around each of the core pole parts; a movable body having a magnet part disposed being separated from each of the core pole parts in an axial direction of each of the core pole parts, for each of the core pole parts; and an elastic support part that movably supports the movable body, in which the magnet part has a magnetic pole disposed on each of the core pole part sides and facing each of the core pole parts, and in which the movable body vibrates in a direction orthogonal to both directions including a direction in which the N-fold of 2 of the core pole parts are aligned and the axial direction of the coil by the energization of the coil.

Abstract: There is provided a pole-piece for a torque motor, the pole-piece comprising a first section formed separate from a second section, wherein the first section and the second section are configured to abut each other to form one or more lines of abutment on an outer surface thereof, and each line of abutment follows an S- or Z-shape when the first section abuts the second section.

Abstract: Provided is a linear vibration motor, including: a housing; a vibration unit received in the housing, including a mass with a through hole and a permanent magnet mounted in the through hole; an elastic module; and a driving unit including an iron core fixedly mounted in the housing and passing through the through hole and a coil. The iron core includes an iron core body portion passing through the through hole and two iron core propping portions extending from two ends of the iron core body portion facing away from a central axis of the iron core body portion. The coil is wound on the iron core body portion. A side of the permanent magnet close to the coil and a side of the permanent magnet close to the mass have opposite magnetic polarities, and after the coil is energized, the two iron core propping portions have opposite magnetic polarities.

Abstract: A vibration motor includes a stationary portion including a casing, a substrate disposed above a bottom portion of the casing, and a coil disposed above the substrate and wound with a conductive wire in a circumferential direction, a vibrating body that includes a magnet and weight and that is supported so as to be capable of vibrating up and down with respect to the stationary portion, and an elastic member disposed between bottom and lower end portions of the vibrating body, in which a lead-out portion led out from the coil is connected to the substrate at a connection portion, a lower end portion of the weight includes at least one protrusion protruding downward, and the protrusion, as viewed in an axial direction, is disposed at a radial position on a radial-direction outer side of the lead-out portion and the connection portion and in a region overlapping the elastic member.

Abstract: Control method for oscillating motor and osculating motor The control unit is further used for storing the set pulse parameters, and outputting alternating pulses with corresponding pulse widths and frequencies according to the set pulse parameters, so that the oscillating arm oscillates in an oscillation mode corresponding to the pulse parameters; wherein the oscillation mode comprises at least one of a full-amplitude oscillation mode, a sub-amplitude oscillation mode, an in-situ shaking mode and a composite oscillation mode, wherein the composite oscillation mode is generated by superposition of the full-amplitude oscillation mode and the in-situ shaking mode, or is generated by superposition of the sub-amplitude oscillation mode and the in-situ shaking mode.

Abstract: For the purpose of obtaining a switchgear that can perform a reliable operation, the switchgear includes: opening and closing coils that drive a movable element, opening and closing capacitors that supply energy to the coils, opening and closing control sections that perform control of charging the capacitors and of energizing the coils, an opening coil that drives the movable element to the open side, an opening capacitor frat supplies energy to the coil, a second opening control section that performs control of charging the opening capacitor and of energizing the opening coil, and an interlock circuit that energizes the second opening control section; and a signal showing that the second opening control section is in operation is supplied to an interlock circuit.

Abstract: An electromagnetic drive mechanism for use in powering vibratory equipment is provided. As one example, a drive mechanism may include a plurality of deflectable elastomeric springs in a configuration that allows the auxiliary springs to achieve a vertical, non-linear spring rate increase.

Abstract: Myofascial release tools may include a head covering and coupled to a post. The head may be constructed of at least partially of a polymeric material having a therapeutically effective durometer. The head may have a number of designs and configurations that may be used for treating different body parts and/or body tissues. An example head may have a partially concave portion that resembles an indent. Another example head may have an angled tip for more pointed therapy. Yet another example head may have a partially convex portion. These heads may be interchangeably and removably coupled to an oscillating device and used for myofascial release by a health care provider or patient.

Abstract: There are provided a headphone and an electrodynamic speaker unit exhibiting proper vibration characteristics and excellent reproduced sound quality. First, second, and third coupling portions of a frame of the headphone defining adjacent two opening holes extend from a magnetic circuit fixing portion to a diaphragm fixing portion such that each of the first, second, and third coupling portions is inclined with respect to a radial line passing through a center point, and are formed such that a first separation distance between the first coupling portion and the second coupling portion and a second separation distance between the second coupling portion and the third coupling portion in a circumferential direction are different from each other and that the opening hole areas of at least two opening holes are unequal to each other.

Abstract: The present invention relates to a sensory signal output apparatus, and more particularly, to a sensory signal output apparatus for generating a sound or a vibration force, in which a magnetic circuit thereof is vibrating in response to an alternating signal of the coil fixed to a case, the magnetic circuit being elastically rebounded and supported by an elastic rebound body, and the elastic rebound body being fixed to an open part of the case; wherein elastic rebound and support paths of the elastic rebound body are traversing the center of the open part of the case in a straight line having the shortest distance, are three-dimensionally traversing such that both the side ends and the middle part thereof have an altitude difference therebetween, and elastically rebounds and supports the magnetic circuit.

Abstract: A magnetic spring assembly that uses the bistable magnetic nature of permanent magnets mediated by a spring material to allow one or more attached vibrating masses to take on the damping characteristics of the magnetic spring assembly includes a permanent magnet body with an attach point 15 for a first vibrating mass, two spring materials, and two magnetic disks firmly attached to a shaft having an attach point 23 for a second vibrating mass to manufacture a mass damper 20 for damping vibrations on at least one of the attached masses. The spring materials can be an elastic material or a spring that is placed between the magnetic disks and the magnetic body to allow the magnetic disks to vibrate in a spring like manner.

Abstract: Disclosed is an electromagnetic vibratory pump, comprising a first C-shaped winding and a first magnet. The first C-shaped winding comprises a first coil and a first electromagnetizable member. The first coil covers the first electromagnetizable member, which comprises a first main body, a first leg and a second leg. The legs are connected to the first main body, and the distance between the legs is reduced from a first width to a second width from the first main body. The first magnet swings in a circular tangential direction. A point of tangency of the circular tangential direction is configured apart from the first leg and the second leg respectively by a first minimum distance. The first minimum distance is less than a half of the second width. The first magnet is driven by the first magnetic line of force to move in the first circular tangential direction, and the first magnet is driven by the second magnetic line of force to move in the second circular tangential direction.

Abstract: A vibration motor, includes a fixed part having a housing with an accommodation space, and a coil fixed in the housing, the housing having an elongated direction; a vibration part comprising an elastic connector for suspending the vibration part in the accommodation space, a magnet assembly including a magnet and a weight for accommodating the magnet, the magnet having a magnetized surface. An extending direction of the magnetized surface is parallel to the elongated direction of the housing, and a vibration direction of the magnet assembly is vertical to the elongated direction of the housing.

Abstract: An elastic member is provided in the present disclosure. The elastic member includes a first elastic part for providing a first amplitude and a second elastic part connected to the first elastic part for providing a second amplitude. The first elastic part includes a first connecting part and a first connecting arm extending from the first connecting part; the second elastic part includes a second connecting arm and a second connecting part extending from the second connecting arm; the second connecting part is parallel to the first connecting part, the second connecting arm extends substantially towards the first connecting parts. A vibrating motor using the elastic member is also provided in the present disclosure.

Abstract: An integrated actuator drive unit (ADU) assembly for an electric motor actuator is disclosed. The integrated ADU assembly may comprise at least one of an integrally formed ring gear, an integrally formed thrust bearing and integrally formed load cell. The integrated ADU assembly may comprise a portion of an electromechanical actuator. The electromechanical actuator may be utilized for aircraft braking systems.

Abstract: A linear vibrator includes a stator having a housing including a receiving space, a moveable unit received in the receiving space, a coil attached to one of the stator and the moveable unit, a magnet assembly attached to the other of the stator and the moveable unit, an elastic member having one end connecting to the moveable unit and another end connecting to the stator for suspending the moveable unit in the receiving space, and a damping block located between the moveable unit and the elastic member, and deformable by the elastic member during the vibration of the moveable unit within a predetermined vibration amplitude. A boost force is produced by the damping block for accelerating the moveable unit to return to balanced position.

Abstract: An integrated actuator drive unit (ADU) assembly for an electric motor actuator is disclosed. The integrated ADU assembly may comprise at least one of an integrally formed ring gear, an integrally formed thrust bearing and integrally formed load cell. The integrated ADU assembly may comprise a portion of an electromechanical actuator. The electromechanical actuator may be utilized for aircraft braking systems.

Abstract: A power tool includes an inner housing (50) at least partially housed within and spaced from an outer housing (30). The inner housing supports a tool (102, 302), such as a pair of shear blades, and houses a motor (80) that drives the tool. The outer housing includes a grip (14, 18) to be grasped by a user. At least one vibration insulator (71-75) can be disposed between the inner housing and the outer housing and in a manner such that the vibration insulator(s) is(are) protected by the outer housing. An intake opening (60a, 60b) and exhaust opening (64a, 64b) can be formed in the inner housing and can be shielded by respective portions of an inner surface of the outer housing.

Abstract: An electromagnetic actuator includes a coil that is selectively energizable by an electric current. The electromagnetic actuator further includes an armature having a outwardly extending prong. The armature is movably disposed with respect to the coil such that when the coil is energized with the electric current, the armature moves in relation to the coil and disposing thereby the prong on a first side of the coil. A flux gatherer is provided to be disposed around a second side of the coil, thereby channeling magnetic flux emanating from the coil back into the armature and prong.

Abstract: An operator control device includes: an activation element configured to provide haptic feedback to an operator, the activation element having a touch-sensitive operator control surface, and the activation element being configured to be activatable by an input member of the operator, triggering an activation signal; a pivoting axis to which the activation element is mounted so as to be pivotable about the axis between a position of rest and a switching position; a rotationally mounted magnetically influenceable element; and an electromagnetic actuator configured to be actuatable by the activation signal so as to generate a magnetic field that moves the rotationally mounted magnetically influenceable element from an initial position into a pivoting position. The movement of the magnetically influenceable element results in a torque sufficient to move the activation element out of the position of rest into the switching position being applied directly or indirectly to the activation element.

Abstract: A linear electric motors including a housing, a first armature movable on a first essentially linear path with respect to the housing, and a second armature movable on a second essentially linear path with respect to the housing, wherein the first armature is mounted to the housing by a first mounting spring, wherein the first armature and the second armature are coupled to each other by a coupling spring, and wherein the second armature is mounted to the housing by a second mounting spring.

Abstract: An electromagnetic drive mechanism (10) comprises a rotor (50) configured to rotate within a stator (30). The rotor (50) and stator (30) have multiple poles (56, 36), wherein each pole comprises a radial inner portion (564, 362) and a radial outer portion (562, 364). The radial inner portions (564, 362) and radial outer portions (562, 364) of the rotor (50) and stator (30) have different heights, forming a step (566, 366) between the radial inner and outer portions of the rotor (50) and stator (30). This configuration allows for overlapping radial surfaces in addition to overlapping axial surfaces during operation of the drive mechanism (10), thereby increasing the total overlap area and thus the reluctance torque, and potentially improving response speed while allowing for a more compact device (10).

Abstract: A membrane pump (1) for pumping a medium has a pump housing (2), a membrane (3) mounted to the pump housing and delimiting a pump chamber (4) inside the pump housing (2) and an actuating device for moving the membrane (3) to and fro to expand and contract the pump chamber (4). In a first operating mode, the actuating device moves the membrane (3) in a frequency suitable for pumping the medium into and out of the pump chamber (4), and in a second operating mode, the actuating device moves the membrane (3) in a frequency in the audible frequency region.

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: A linear vibration device is disclosed. The linear vibration device includes a housing, a plurality of elastic members received in the housing, each of the elastic member has a fastening portion connecting to the housing, an elastic arm extending from the fastening portion, and a mounting portion extending from the elastic arm, a moving unit suspended in the housing by the elastic members, a coil located below the moving unit, a supporting portion coupling to the elastic member, the supporting portion has a supporting plate covering at least a part of a top surface of the moving unit and a supporting arm extending downwardly from the supporting plate for pushing the mounting portion toward the positioning portion of the moving unit, the mounting portion has a fender defining a top part above the top surface of the moving unit for restricting the position of the supporting plate.

Abstract: An electric energy generator from a vibrational field includes a body of non-ferromagnetic material, at least one pair of permanent magnets pivotally hung from the body in such a way that they are arranged therebetween. The magnets have faces of equal magnetic polarity turned to each other from opposite sides of the body, whereby a repulsive force is established between the magnets tending to keep them spread apart in an equilibrium position. A plurality of electric coils is arranged on the surface of the body so as to intercept the magnetic field generated by the magnets. The body is configured to be connectable to a vibration source, the vibration contrasting the repulsive force and causing an oscillation of the magnets about the equilibrium position, thereby generating a magnetic flux variation and thus an electric power production as an output from the electric coils.

Abstract: A vibration generator making a closed loop of a magnetic circuit of a permanent magnet to obtain a high vibrating force while kept small in size, including a reciprocating vibrator having a ring-shaped permanent magnet in a center hole of a ring-shaped weight, a first and second plate springs supporting this reciprocating vibrator at a recessed case and end plate to be able to elastically displace in a thickness direction spanning a first and a second end faces, a tubular toroidal coil passing through a center hole of the permanent magnet and generating a reciprocating vibrating magnetic field for reciprocatingly driving the permanent magnet in the thickness direction, and a columnar core passing through this toroidal coil, the ring-shaped permanent magnet being magnetized in the thickness direction, and the toroidal coil having a lower toroidal coil and an adjoining reversely wound series connected upper toroidal coil coaxial with the same.

Abstract: Disclosed is a vibration motor for a portable terminal, including a flat spring; a cylindrical magnetic substance mounted on the flat spring; an annular magnetic substance disposed around the cylindrical magnetic substance mounted on the flat spring; and a coil disposed between the cylindrical magnetic substance and the annular magnetic substance, wherein the magnetic substances perform a linear reciprocal movement by the electromagnetic force generated between the magnetic substances and the coil and by the elastic force of the flat spring as an electric current is applied to the coil. The vibration motor operates at higher resonant frequencies than those of conventional vibration motors, thereby improving the sense of an after-vibration and realizing a delicate haptic feedback function.

Abstract: A mover includes a permanent magnet array including permanent magnets magnetized in a perpendicular direction perpendicular to a motion direction of the mover such that magnetic poles having different polarities alternately appear on magnetic pole surfaces of the permanent magnets along the motion direction. A stator includes first and second magnetic pole portion assemblies disposed on both sides of the permanent magnet array in the perpendicular direction and each including magnetic pole portions facing the magnetic pole surfaces, and a single phase winding that excites the magnetic pole portions forming the first and second magnetic pole portion assemblies. The winding has a hollow structure formed by winding a winding conductor into a coil such that the magnetic pole portions included in the first magnetic pole portion assembly and the magnetic pole portions included in the second magnetic pole portion assembly are located in an internal space of the winding.

Abstract: An electromechanical generator for converting mechanical vibrational energy into electrical energy, the electromechanical generator comprising a housing, an electrically conductive coil assembly movably mounted in the housing, the coil assembly having radially inner and outer sides, and upper and lower edges, thereof, a mount for the coil assembly extending inwardly of the radially inner side for mounting the coil assembly for linear vibrational motion along an axis about, a first biasing device mounted between the housing and the mount to bias the electrically conductive coil assembly in opposed directions along the axis towards a central coil position, a magnetic core assembly movably mounted in the housing for linear vibrational motion along the axis, and a second biasing device mounted between the housing and the magnetic core assembly to bias the magnetic core assembly in opposed directions along the axis towards a central magnet position, wherein the magnetic core assembly encloses the electrically cond

Abstract: A spring plate includes an engaging portion, a connecting portion, a first elastic portion, a second elastic portion, a first fixing portion, and a second fixing portion. The first elastic portion and the second elastic portion are connected to the engaging portion and the connecting portion, the first fixing portion and the second fixing portion are formed on opposite ends of the connecting portion. The engaging portion defines a recess. The present disclosure further provides a voice coil motor using the spring plate.

Abstract: A permanent magnet motor having three chambers aligned end to end where each chamber has a bar magnet. The north pole of the bar magnet in the center chamber faces the north pole of the bar magnet in the chamber to its right and the south pole of the bar magnet in the center chamber faces the south pole of the bar magnet in the chamber to its left. Structure is provided to move the end magnets away from the center magnet and, by means of springs, alternately sequentially snap the end magnets toward the center magnet to drive the center magnet back and forth in its chamber. Shaft members which are connected to gears are provided to control the movement of the end magnets and to convert the back and forth motion of the center magnet to a rotary motion.

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: 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: An electromagnetic driven membrane pump has a pump housing inside which at least one pump chamber (15) having at least one intake and outlet is formed and delimited between a gable (1) of the pump housing and at least one completely-sealed membrane (14) attached to a wall (4) of the pump housing and, in an axial direction of the pump housing, to a running axle (13) suspended in at least two separated suspensions in a longitudinal direction of the axle (13). At least one of the suspensions is composed of a flat spring (9) attached to the axle (13) in a radial direction out toward the wall (4) of the pump housing. The axle (13) is composed of magnetic material to be driven by a magnetic field from an electromagnet (7) for oscillation in its longitudinal direction and moving the membrane (14) in corresponding oscillating movement. The flat spring (9) is composed of an inner and at least one outer part, with the inner part attached to the axle (13) and the outer part(s) attached to the pump housing.

Abstract: A vibration motor is disclosed. In accordance with an embodiment of the present invention, the vibration motor includes a base, a vibrator, which reciprocates in the base, a protruding part, which is formed on at least one of the base and the vibrator, and an elastic body, which is interposed between the base and the vibrator and has a through-part formed therein and in which the protruding part is inserted into the through-part and the elastic body is coupled to the base or the vibrator by caulking or bending the protruding part which is protruded through the through-part. Thus, the vibration motor can have a uniform resonant frequency characteristic since a spring is coupled by way of caulking or bending.

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: A reciprocating vibrator able to prevent detachment of a spindle even without an outer cover, that is, a vibration linear actuator provided with a ring-shaped weight 20 having a permanent magnet 30, 31 at its inner circumference side, a first plate spring 40 fastened to a first end face 20a of this weight 20 at outer circumference side tail parts 41a, 42a, a second plate spring 50 fastened to a second end face 20b of the weight 20 at outer circumference side tail parts 51a, 52a, and a stator supporting the first and second plate springs 40, 50 and having an excitation coil 60 generating a reciprocating vibrating magnetic field with respect to the weight 20 at an inner circumference side of the permanent magnet 30, 31, wherein the stator further has a metal end plate 70 fastening the second plate spring 50 by the ring-shaped plate part 53.

Abstract: A linear electric motors including a housing, a first armature movable on a first essentially linear path with respect to the housing, and a second armature movable on a second essentially linear path with respect to the housing, wherein the first armature is mounted to the housing by a first mounting spring, wherein the first armature and the second armature are coupled to each other by a coupling spring, and wherein the second armature is mounted to the housing by a second mounting spring.

Abstract: A reciprocating vibration generator of a structure enabling force of a reciprocating vibrating body striking a coil to be absorbed by magnetic fluid even if an external impact force is applied, that is, a reciprocating vibration generator provided in a case body 100 with an upper plate spring 40 and a lower plate spring 50 for supporting a ring-shaped weight 20 having a ring-shaped permanent magnet 30 comprised of a combination of semi-ring-shaped permanent magnets 30R, 30L at its inner circumference side so as to be able to reciprocally vibrate in a vertical direction and a cylindrical excitation coil 60 passing through the inside of the ring-shaped permanent magnet 30 in the vertical direction and generating a reciprocating vibrating magnetic field, wherein the semi-ring-shaped permanent magnets 30R, 30L are magnetized in a direction spanning the inner circumferential surface and outer circumferential surface, the inner circumferential surface and top and bottom end faces of the semi-ring-shaped permanent m

Abstract: An electromechanical generator for converting mechanical vibrational energy into electrical energy, the electromechanical generator comprising a substantially annular high-permeability core, the core including at least one magnet therein to define a magnetic circuit, at least one rotatable bearing mounting the core to at least one bearing support, the at least one bearing permitting the core to pivot about a pivot axis, a gap provided in the core, a body of high-permeability material located in the gap, the body being spaced from respective end faces of the core by a respective spacing whereby pivoting movement of the core about the pivot axis causes relative movement between the end faces of the core and the body, and a rotationally fixed coil surrounding a length of the core coaxially with the pivot axis.

Abstract: A permanent magnet motor having three chambers aligned end to end where each chamber has a bar magnet. The north pole of the bar magnet in the center chamber faces the north pole of the bar magnet in the chamber to its right and the south pole of the bar magnet in the center chamber faces the south pole of the bar magnet in the chamber to its left. Structure is provided to move the end magnets away from the center magnet and, by means of springs, alternately sequentially snap the end magnets toward the center magnet to drive the center magnet back and forth in its chamber. Shaft members which are connected to gears are provided to control the movement of the end magnets and to convert the back and forth motion of the center magnet to a rotary motion.

Abstract: Disclosed herein is a spring for a linear vibration motor. The spring elastically supports a vibrator to a stator of the linear vibration motor. The vibrator linearly vibrates using electromagnetic force generated by interaction between a coil and a magnet. The spring is provided between the stator and the vibrator. The spring includes a body part and an elastic part. The elastic part is coupled at a first end thereof to the body part. The elastic part extends a predetermined length such that a second end thereof is spaced apart from the body part.

Abstract: A vibration motor is disclosed. In accordance with an embodiment of the present invention, the vibration motor includes a base, a vibrator, which reciprocates, a coupling part, which is protruded on at least one of the base and the vibrator, and a leaf spring, which includes a frame and an elastic part. Here, the frame is coupled to the coupling part and disposed apart from the base or the vibrator in which the coupling part is formed, and the elastic part is extended from the frame and elastically supports the vibrator. Thus, the leaf spring can be prevented from having concentrated stress and damage occurred, thereby improving the lifetime of the leaf spring.

Abstract: A vibration motor is disclosed. In accordance with an embodiment of the present invention, the vibration motor includes a cylinder-shaped coil unit, a vibrator, which is inserted into the coil unit and includes a magnet that forms an asymmetric magnetic field in a vibration direction, and an elastic body, which elastically supports the vibrator. Thus, the vibration motor can have a nonlinear characteristic, and thus a frequency bandwidth in which a resonance occurs can be expanded.

Abstract: A vibration motor is disclosed. In accordance with an embodiment of the present invention, the vibration motor includes a base, a vibrator, which reciprocates in the base, a protruding part, which is formed on at least one of the base and the vibrator, and an elastic body, which is interposed between the base and the vibrator and has a through-part formed therein and in which the protruding part is inserted into the through-part and the elastic body is coupled to the base or the vibrator by caulking or bending the protruding part which is protruded through the through-part. Thus, the vibration motor can have a uniform resonant frequency characteristic since a spring is coupled by way of caulking or bending.

Abstract: A linear vibrator is disclosed. 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, and a plurality of leaf springs, which are interposed between the magnet and the base. Here, the plurality of leaf springs face one another and are coupled to one another Thus, the linear vibrator can increase the range of vibration displacement in a structure and increase the amount of vibration in the linear vibrator. Also, even though the linear vibrator becomes thinner, the range of displacement can be increased because the weight is vibrated horizontally.