Abstract: An anti-twist structure of a voice coil motor includes a base, a lens housing, a first elastic sheet, a second elastic sheet, a magnet, and a yoke member. The lens housing has first margin wall and a second margin wall, and a first protrusion extends from the first margin wall. The yoke member has a first wall, a connection wall, a second wall, and a side wall. The first wall is disposed above the first protrusion, and the second wall is above the first margin wall. The lens housing has a deflectable angle relative to a horizontal reference line. When the lens housing deflects to a maximum value of the deflectable angle, the first margin wall abuts against the second wall and/or the first protrusion abuts against the first wall.

Abstract: A lens driving device is provided, the lens driving device including: a housing; a bobbin disposed at an inner side of the housing; a first driving part disposed on the bobbin; a second driving part disposed on the housing and facing the first driving part; a first mounting part disposed on the bobbin; a second mounting part disposed on the bobbin and disposed at an opposite side of the first mounting part based on a center of the bobbin; a first magnet disposed on the first mounting part; a sensor part sensing a position of the first magnet; and a second magnet disposed on the second mounting part.

Abstract: An anti-twist structure of voice coil motor includes a base, a lens housing, an elastic sheet, a magnet, and a yoke member. The lens housing has a margin wall, and the margin wall has a first protrusion and a contact portion. The elastic sheet has a hollowed slot, and the first protrusion pass through the hollowed slot, so that the elastic sheet is disposed on a portion of the margin wall and on the contact portion. The yoke member has an upper wall and a side wall. The side wall is disposed at one side of the upper wall and the side wall extends outward in a direction not parallel to the upper wall. The yoke member surrounds the lens housing, the elastic sheet, and the magnet. The lens housing has a deflectable angle relative to a horizontal reference line.

Abstract: A lens moving apparatus includes a housing for supporting a first magnet, a bobbin, which includes a first coil provided on an outer surface thereof and which moves in a first direction, a support member, which is disposed over one side surface of the housing, and which supports the bobbin and the housing such that the bobbin and the housing are movable in second and/or third directions, which are perpendicular to the first direction, a second coil, which is disposed over the housing, and which is spaced apart from the support member by a predetermined distance and which generates an electromagnetic force to move the support member in the second and/or third directions, and a printed circuit board disposed over the second coil.

Abstract: The present embodiment relates to a dual camera module comprising: a substrate; a first image sensor disposed on the substrate; a second image sensor disposed on the substrate while being spaced apart from the first image sensor; a housing disposed on the upper side of the substrate; a first bobbin disposed on the upper side of the first image sensor inside the housing; a second bobbin disposed on the upper side of the second image sensor inside the housing; a first coil disposed in the first bobbin; a second coil disposed in the second bobbin; and a first magnet which is disposed between the first coil and the second coil and faces the first coil and the second coil.

Abstract: A lens driving module for holding and moving a lens is provided, including a lens holder, a first electromagnetic driving assembly disposed on the lens holder, a base, a second electromagnetic driving assembly disposed on the base, and a first elastic member. The lens holder has an accommodating space, and the lens is disposed in the accommodating space. The second electromagnetic driving assembly is adjacent to the first electromagnetic driving assembly. The first elastic member has at least one first fixed portion and at least one moving portion. The first fixed portion is connected to the base, and the first moving portion is connected to the lens holder. The first fixed portion is disposed between the second electromagnetic driving assembly and the base.

Abstract: The VCM according to an exemplary embodiment of the present disclosure includes a base unit, a mover including a bobbin arranged at an upper surface of the base unit and formed with a plurality of rotation prevention units along a periphery and a first driving unit arranged at a periphery of the bobbin, a stator including a yoke configured to the base unit to surround the mover and inner yoke units each extended to between the rotation prevention units, and a second driving unit oppositely arranged to the first driving unit, and an elastic member elastically supporting the mover, wherein an object occurrence preventing portion is formed between the rotation prevention unit and the inner yoke units to decrease a contact area between the rotation prevention unit and the inner yoke units.

Abstract: A VCM (voice coil motor) is disclosed, the VCM including: a rotor including a cylindrical bobbin for accommodating a lens and protruded at a bottom end with a boss, and a coil block arranged at a periphery of the bobbin; a stator including a magnet facing the coil block and a yoke fixing the magnet; and an elastic member including a first elastic member formed with a through hole coupled to the boss of the bobbin and a second elastic member coupled to an upper end facing the bottom end of the bobbin; wherein the boss is formed with a disengagement prevention unit inhibiting the first elastic member from being disengaged from the boss, and the first elastic member is formed with a coupling unit contacting a joint where the disengagement prevention unit and the coupling unit meet.

Abstract: Embodiments provide a lens moving apparatus including a first magnet, a housing, a bobbin, around which a coil is wound and which moves in a first direction in the housing, an upper elastic member disposed on upper surfaces of the bobbin and the housing, a lower elastic member disposed under lower surfaces of the bobbin and the housing, and a damping member disposed between the upper or lower elastic member and the bobbin.

Abstract: A VCM (voice coil motor) is disclosed, the VCM including: a rotor including a lens-accommodating, both ends opened cylindrical bobbin and a coil block including a coil wound on a periphery of the bobbin; a stator including a cylindrical yoke formed with a lens-exposing opening, a plurality of magnets disposed inside the yoke and opposite to the coil block, and a housing disposed inside the yoke to fix the plurality of magnets; and an elastic member elastically supporting the bobbin.

Abstract: A lens driving device is provided, including: a cover member; a bobbin installed with at least one lens and having a coil unit arranged on an outer circumferential surface of the bobbin; a magnet arranged at a positon corresponding to that of the coil unit; first and second elastic members, where one end of each of the first and second elastic members may be respectively coupled to an upper surface and a lower surface of the bobbin and supporting movement of the bobbin in an optical axis direction; a detection unit configured to detect movement of the bobbin in a direction parallel to the optical axis direction; a damping member arranged at a connecting portion between the bobbin and the first elastic member; and a support unit provided at at least one of the bobbin and the first elastic member and maintaining an arranged position of the damping member.

Abstract: A driving mechanism is provided, including a fixed portion, a movable portion, a driving assembly and a connecting element. The movable portion may move relative to the fixed portion and is used for holding an optical module. The driving assembly moves the movable portion relative to the fixed portion. The connecting element is movably connected to the fixed portion and the movable portion.

Abstract: A planar coil linear actuator/transducer. A stack of individually driven planar coils are used. A common core passes through the center of the stack of coils. A mobile magnet resides in the core. The coils are selectively energized in order to drive the magnet as desired. It is possible to control both frequency and amplitude by controlling the motion of the magnet. In a preferred embodiment, each planar coil is created as a copper (or other conductive material) trace on a multi-layer printed circuit board.

Abstract: The VCM according to an exemplary embodiment of the present disclosure includes a base unit, a mover including a bobbin arranged at an upper surface of the base unit and formed with a plurality of rotation prevention units along a periphery and a first driving unit arranged at a periphery of the bobbin, a stator including a yoke configured to the base unit to surround the mover and inner yoke units each extended to between the rotation prevention units, and a second driving unit oppositely arranged to the first driving unit, and an elastic member elastically supporting the mover, wherein an object occurrence preventing portion is formed between the rotation prevention unit and the inner yoke units to decrease a contact area between the rotation prevention unit and the inner yoke units.

Abstract: The present embodiment relates to a dual camera module comprising: a substrate; a first image sensor disposed on the substrate; a second image sensor disposed on the substrate while being spaced apart from the first image sensor; a housing disposed on the upper side of the substrate; a first bobbin disposed on the upper side of the first image sensor inside the housing; a second bobbin disposed on the upper side of the second image sensor inside the housing; a first coil disposed in the first bobbin; a second coil disposed in the second bobbin; and a first magnet which is disposed between the first coil and the second coil and faces the first coil and the second coil.

Abstract: The present invention relates to a lens driving apparatus, comprising: a cover member which comprises an upper plate and a side plate extending downwardly from the upper plate; a housing which is located in an inner space formed by the upper plate and the side plate; a base which is positioned below the housing; a first driving unit which is positioned in the housing; a second driving unit which is located in the base and has an electromagnetic interaction with the first driving unit; and a side support member which elastically supports the housing with respect to the base, wherein the cover member comprises a first round portion formed to be rounded in at least a part of portion at which the upper plate and the side plate meet, and the housing comprises a second round portion which is formed in a part of the housing corresponding to the first round portion and has a curvature radius which is smaller than or equal to a curvature radius of the first round portion.

Abstract: A camera module according to an exemplary embodiment of the present disclosure is proposed, the camera module including a PCB (Printed Circuit Board) mounted with an image sensor, a housing member arranged at an upper surface of the PCB, a bobbin movably positioned at an inner side of the housing member, an upper elastic member connected to an upper surface of the housing member and to an upper surface of the bobbin, and a space forming part formed at one side of the housing member to provide a moving space to the upper elastic member when the bobbin makes a relatively vertical movement to the housing member.

Abstract: A planar coil linear actuator/transducer. A stack of individually driven planar coils are used. A common core passes through the center of the stack of coils. A mobile magnet resides in the core. The coils are selectively energized in order to drive the magnet as desired. It is possible to control both frequency and amplitude by controlling the motion of the magnet. In a preferred embodiment, each planar coil is created as a copper (or other conductive material) trace on a multi-layer printed circuit board.

Abstract: A lens driving device is proposed, including a cover can whose upper side surface includes an opening formed to expose a lens and whose side surface extends from the upper side surface to a base, a base that is secured to the cover can; a housing that is arranged on top of the base and moves in first and second directions that are perpendicular to an optical axis, a bobbin that is housed in the housing and moves in an optical axis direction, an actuator that includes a magnet unit arranged in the housing, a first coil unit arranged in an outer side surface of the bobbin, and a second coil unit that is arranged on top of the base, and a substrate that is disposed between the second coil unit and the base so as to control the first coil unit and the second coil unit.

Abstract: A camera module includes a PCB (Printed Circuit Board) installed with an image sensor, a base mounted on the PCB, and a bobbin reciprocatingly mounted above the base. A bottom elastic member is fixed to the base to support the bobbin, and a terminal is installed at the base, one end of which is conductively connected to the PCB and the other end of which is conductively connected to the bottom elastic member at a solder part. A solder cut-off part is formed at the base to cut off movement of overflowing solder from the solder part.

Abstract: A camera module according to an exemplary embodiment of the present disclosure is proposed, the camera module including a PCB (Printed Circuit Board) mounted with an image sensor, a housing member arranged at an upper surface of the PCB, a bobbin movably positioned at an inner side of the housing member, an upper elastic member connected to an upper surface of the housing member and to an upper surface of the bobbin, and a space forming part formed at one side of the housing member to provide a moving space to the upper elastic member when the bobbin makes a relatively vertical movement to the housing member.

Abstract: A VCM (voice coil motor) is disclosed, the VCM including: a rotor including a lens-accommodating, both ends opened cylindrical bobbin and a coil block including a coil wound on a periphery of the bobbin; a stator including a cylindrical yoke formed with a lens-exposing opening, a plurality of magnets disposed inside the yoke and opposite to the coil block, and a housing disposed inside the yoke to fix the plurality of magnets; and an elastic member elastically supporting the bobbin.

Abstract: Systems, devices, and methods of manufacture are provided for a cylindrical compressor with a standardized shell and core. The compressor including a cylindrical cast metal shell having a shell bore extending longitudinally therethrough and configured to receive a cylindrical cast metal core. The core having a core bore extending longitudinally therethrough defining a core bore diameter within a predefined range of diameters and corresponding to a shell bore diameter. The core having an outer diameter configured to provide an interference fit between the core and the shell when the core is disposed within the shell. The compressor including a plurality of valve assemblies extending through the shell and the core so as to interface a valve of the valve assembly with the core bore and further including cylinder head coupled to the shell, a piston rod assembly configured within the core bore, and a packing case coupled to the core.

Abstract: The VCM according to an exemplary embodiment of the present disclosure includes a base unit, a mover including a bobbin arranged at an upper surface of the base unit and formed with a plurality of rotation prevention units along a periphery and a first driving unit arranged at a periphery of the bobbin, a stator including a yoke configured to the base unit to surround the mover and inner yoke units each extended to between the rotation prevention units, and a second driving unit oppositely arranged to the first driving unit, and an elastic member elastically supporting the mover, wherein an object occurrence preventing portion is formed between the rotation prevention unit and the inner yoke units to decrease a contact area between the rotation prevention unit and the inner yoke units.

Abstract: A voice coil motor includes a housing, a cover plate, an upper elastic member; a movable assembly, an immovable assembly, a lower elastic member, and a base cooperating with the housing to receive the cover plate, the upper elastic member, the movable assembly, the immovable assembly, and the lower elastic member. The base is made of laser direct structuring material. A metal layer is formed on a region of the base connecting the housing by Laser Direct Structuring processes, and the metal layer is fixed on the housing by laser welding or solder paste spot welding. The disclosure also provides an electronic device having the voice coil motor.

Abstract: A lens driving device is provided, including: a cover member; a bobbin installed with at least one lens and having a coil unit arranged on an outer circumferential surface of the bobbin; a magnet arranged at a position corresponding to that of the coil unit; first and second elastic members, where one end of each of the first and second elastic members may be respectively coupled to an upper surface and a lower surface of the bobbin and supporting movement of the bobbin in an optical axis direction; a detection unit configured to detect movement of the bobbin in a direction parallel to the optical axis direction; a damping member arranged at a connecting portion between the bobbin and the first elastic member; and a support unit provided at at least one of the bobbin and the first elastic member and maintaining an arranged position of the damping member.

Abstract: An integrated structure of auto focus (AF) and optical image stabilizer (OIS) mechanisms includes a lens holder, a frame, magnets, suspension elements, and a driver board. The lens holder has an AF coil disposed outside thereof and is suspended in the frame. The inner edges of the sidewalls of the frame are close to but do not contact the outer edge of the AF coil. The magnets are disposed between the frame and the lens holder and correspond to the outer edge of the AF coil, for driving the lens holder back and forth along an optical axis (i.e. the Z axis). The suspension elements suspend the frame in the direction of the optical axis. The driving board has fine pattern coils each corresponding to one of the magnets, for driving the frame laterally (i.e. along the X-axis and/or Y-axis) with respect to the optical axis.

Abstract: A vibration device includes a housing having accommodating space, a vibrator, a stator and an elastic member configured to suspend the vibrator in the accommodating space, the vibrator, the stator and the elastic member are accommodated in the housing, one of the vibrator and the stator includes a magnetic circuit unit while the other one includes a coil, the housing includes a pair of first side walls symmetrically arranged in its long axis direction and a pair of second side walls symmetrically arranged in a short axis direction, the elastic member is a sheet-like spring perpendicular to vibrating direction of the vibrator, the elastic member includes a first fixing portion fixedly connected with the second side wall, a second fixing portion fixedly connected with the vibrator, and an S-shaped connecting portion which connects the first fixing portion with the second fixing portion and extends along long axis direction.

Abstract: Various examples are provided for digital sound reconstruction using piezoelectric array elements. In one example, a digital loudspeaker includes a fixed frame and an array of transducers disposed on the fixed frame. Individual transducers of the array of transducers can include a flexible membrane disposed on a piezoelectric actuation element positioned over a corresponding opening that extends through the fixed frame. In another example, a method includes forming a flexible membrane structure on a substrate and backetching the substrate opposite the flexible membrane structure. The flexible membrane structure can be formed by disposing a first electrode layer on a substrate, disposing a piezoelectric layer on the first electrode layer and disposing a second electrode layer on the piezoelectric layer. A flexible membrane layer (e.g., polyimide) can be disposed on the second electrode layer.

Abstract: The present invention relates to a lens driving apparatus, comprising: a cover member which comprises an upper plate and a side plate extending downwardly from the upper plate; a housing which is located in an inner space formed by the upper plate and the side plate; a base which is positioned below the housing; a first driving unit which is positioned in the housing; a second driving unit which is located in the base and has an electromagnetic interaction with the first driving unit; and a side support member which elastically supports the housing with respect to the base, wherein the cover member comprises a first round portion formed to be rounded in at least a part of portion at which the upper plate and the side plate meet, and the housing comprises a second round portion which is formed in a part of the housing corresponding to the first round portion and has a curvature radius which is smaller than or equal to a curvature radius of the first round portion.

Abstract: A vibration device, including a housing having accommodating space, a vibrator, a stator and an elastic member for making the vibrator suspended in the accommodating space, the vibrator, the stator and the elastic member are accommodated in the housing, one of the vibrator and the stator includes a magnetic circuit unit while the other one includes a coil, the housing includes a pair of first side walls symmetrically arranged in a long axis direction of the housing and a pair of second side walls symmetrically arranged in a short axis direction, the elastic member includes a sheet-like spring perpendicular to vibrating direction of the vibrator, the spring includes a first fixing portion fixedly connected with the housing, a second fixing portion fixedly connected with the vibrator, and an N-shaped connecting portion connects the first fixing portion with the second fixing portion and extends along the short axis direction.

Abstract: A lens driving device is provided with: a driving part including a movable part and a fixing part, a base member having a rectangular shape in plan view, wherein a shield cover is attached at a peripheral portion of the base member, and a side surface of the peripheral portion and a lower inner peripheral surface of the shield cover are bonded to each other, and a ground terminal part disposed in the base member. The base member includes at a first side of the peripheral portion a plurality of terminal housing parts recessed from the side surface. The ground terminal part includes a first ground terminal part integrally attached to the first side, and the first ground terminal part includes a plurality of ground terminals having different lengths, the ground terminals being respectively disposed in the plurality of terminal housing parts to be separated from the side surface.

Abstract: An oscillating device comprising: a vibrating table; an X-axis oscillating unit configured to oscillate the vibrating table in an X-axis direction; a Y-axis oscillating unit configured to oscillate the vibrating table in a Y-axis direction; a Z-axis oscillating unit configured to oscillate the vibrating table in a Z-axis direction; a first linear guideway configured to couple the vibrating table and the Z-axis oscillating unit slidably in the X-axis direction; and a second linear guideway configured to couple the vibrating table and the Z-axis oscillating unit slidably in the Y-axis direction, wherein the first linear guideway comprises: a first rail extending in the X-axis direction; and a first carriage configured to engage with the first rail slidably in the X-axis direction, wherein the second linear guideway comprises: a second rail extending in the Y-axis direction; and a second carriage configured to engage with the second rail slidably in the Y-axis direction, wherein the first carriage is provided wi

Abstract: A vibration motor, including a shell, a vibrator and a stator accommodated in the shell, and an elastic member suspending the vibrator in the shell, one of the vibrator and the stator includes a magnetic circuit unit while the other one includes a coil. the elastic member is a sheet-like spring, and a plane where the elastic member is located is perpendicular to a vibrating direction of the vibrator, the elastic member is of a U-shape, and includes a first fixing portion and a second fixing portion respectively which are fixed to the vibrator and spaced from each other, a third fixing portion located between the first fixing portion and the second fixing portion and fixed to the shell, a first deforming portion connecting the third fixing portion with the first fixing portion, and a second deforming portion connecting the third fixing portion with the second fixing portion.

Abstract: A feeder and a feeder control method, as well as an electronic component device, reliably engaging a supply tape in a loading operation even if there is an accumulated pitch error between sprocket holes. Third, second and first sprockets are arranged successively from an insertion port. The sprocket hole on a forward end portion of the inserted supply tape is fitted with a third tooth of the third sprocket in the loading operation. The supply tape is rotated by rotation of the third sprocket until fitting with a second tooth of the second sprocket, and the rotation of the third sprocket is stopped after the second tooth fits with the sprocket hole on the forward end portion.

Abstract: A vibrating motor is provided in the present disclosure. The vibrating motor includes a shell, a base covered by the shell for forming an accommodating space, a vibrating system accommodated in the accommodating space, and a pair of elastic connectors connected to two opposite ends of the vibrating system respectively for elastically suspending the vibrating system in the accommodating space. Each elastic connector includes a first elastic member and a second elastic member for connecting a corresponding end of the vibrating system to the shell; the first elastic member includes a first elastic arm, and the second elastic member includes a second elastic arm crossing over and interesting with the first elastic arm.

Abstract: A voice coil motor includes a housing having a cavity; a movable assembly received in the cavity; a fixing assembly configured outside of the movable assembly; and a first spring plate and a second spring plate configured at an upper surface and a lower surface of the movable assembly respectively. The fixing assembly comprises at least two magnetic elements connected with the first spring plate and a spacer member configured on the second spring plate to connect the second spring plate to the magnetic elements or the housing. The voice coil motor is served as an actuator of electronic products such as digital cameras, mobile phones, and digital cameras, which has thin thickness, good performance and strong applicability.

Abstract: Active vibratory control device comprising an armature, a movable element comprising a coil and mounted so as to be able to slide with respect the armature, a spring connecting the armature to the movable element. The armature comprises an electrical supply circuit and the spring comprises a conductive part that connects the electrical supply circuit to the coil.

Abstract: Embodiments described herein may take the form of an electromagnetic actuator that produces a haptic output during operation. Generally, an electromagnetic coil is wrapped around a central magnet array. A shaft passes through the central magnet array, such that the central array may move along the shaft when the proper force is applied. When a current passes through the electromagnetic coil, the coil generates a magnetic field. The coil is stationary with respect to a housing of the actuator, while the central magnet array may move along the shaft within the housing. Thus, excitation of the coil exerts a force on the central magnet array, which moves in response to that force. The direction of the current through the coil determines the direction of the magnetic field and thus the motion of the central magnet array.

Abstract: A flat linear vibration motor is disclosed.

Abstract: A coil unit may include coils and a coil holding member. An outer peripheral face of the coil holding member includes two side-face pairs, each of which includes a pair of parallel side faces. Each side face includes a protruded part around which the coil is wound and an abutting face with which one end face of the coil is abutted. Two pieces of the coil wound around protruded parts of two paired side faces is formed of one conducting wire. One side faces includes a coil guide part for wiring a crossover wire which connects the coil wound around the protruded part of one side face with the coil wound around the protruded part of the paired side-face pair, the coil guide part being recessed from the abutting face, and a recessed amount of the coil guide part is not less than an outer diameter of the conducting wire.

Abstract: A voice coil motor includes a base, a first resilient member, a movable member, a wire coil, a second resilient member, a housing, and a group of magnets. The base includes a through hole, a circular groove surrounding the through hole and guide poles extending away from the base. The first resilient member includes a number of guide holes arranged at a peripheral. The movable member includes a receiving through hole for receiving a lens module, a top end and a bottom end, the moveable frame is fixed with the first resilient member and suspended above the circular groove. The wire coil surrounds the movable member. The second resilient member locates on the top end of the moveable frame. The housing receives the base. Each magnets is fixed to the second resilient member, the magnets and the wire coil cooperatively generate a magnetic force for driving the movable member.

Abstract: The present disclosure relates to a voice coil motor. The voice coil motor includes a base, an adjustment member, a first elastic member, a lens holder, a coil, at least one magnet, and a second elastic member. The base defines a through hole. The adjustment member is arranged in the through hole and is able to move along a central axis of the through hole relative to the base. The first elastic member is fixed on the base. The lens holder is fixed on the first elastic member. The coil is arranged surrounding an outer surface of the lens holder. The at least one magnet is arranged at an outer side of the coil. The second elastic member including an inner ring, the lens holder is fixed on the inner ring opposite to the first elastic member.

Abstract: The VCM according to an exemplary embodiment of the present disclosure includes a base unit, a mover including a bobbin arranged at an upper surface of the base unit and formed with a plurality of rotation prevention units along a periphery and a first driving unit arranged at a periphery of the bobbin, a stator including a yoke configured to the base unit to surround the mover and inner yoke units each extended to between the rotation prevention units, and a second driving unit oppositely arranged to the first driving unit, and an elastic member elastically supporting the mover, wherein an object occurrence preventing portion is formed between the rotation prevention unit and the inner yoke units to decrease a contact area between the rotation prevention unit and the inner yoke units.

Abstract: Embodiments provide a lens moving apparatus including a bobbin in which a lens is mounted, a first coil and a magnet configured to electromagnetically interact with each other so as to move the bobbin, a housing configured to accommodate the bobbin therein, an elastic member including an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a frame connection portion configured to connect the inner frame and the outer frame to each other, and a support member connected to the elastic member and configured to support the housing, and the outer frame includes a first coupling portion coupled to the housing, a second coupling portion coupled to the support member, the second coupling portion being spaced apart from the first coupling portion, and a single connection portion configured to connect the first coupling portion and the second coupling portion to each other.

Abstract: A realistic simulation of the dynamic sounds of a full-sized vehicle are created on a moving R/C Scale Model. A mounting apparatus supports an audio exciter in a model vehicle without any modification to the exciter. A full range of volume of sound may be produced by the exciter without limiting the range of movement of the exciter as volume is increased or decreased. The apparatus may limit the mechanical excursion of the exciter to prevent physical damage to the exciter. The present invention also provides a method and apparatus for operating the audio exciter in a model vehicle.

Abstract: A linear drive for a miniaturized optical system, as used for example in an endoscope, includes a stator and an armature. The stator has a coil with two stator pole shoes arranged in axial direction, and two magnetic field sensors arranged at the outer side of the stator pole shoes. The armature has permanent magnets which are polarized in opposite directions, and a center armature pole shoe between the two permanent magnets, and an armature pole shoe at each side of the permanent magnet, opposite to the center armature pole shoe in axial direction. The magnetic field of the outer armature pole shoe goes completely or only in part, dependent from the armature position, through the magnetic field sensor and thus generates a position-dependent signal. This signal can be used for measuring and/or controlling the position of the armature.

Abstract: A linear compressor is provided. The linear compressor may include a shell having a refrigerant inlet, a cylinder provided inside the shell, a piston that reciprocates inside the cylinder to compress a refrigerant, a motor assembly that provides a drive force to the piston, and a magnet assembly that delivers the drive force to the piston. The magnet assembly may include a magnet frame having a cylindrical shape. A permanent magnet may be installed in or on the magnet frame. A coupling plate may be coupled to a side of the magnet frame and may include a flange coupled to an end portion of the permanent magnet.

Abstract: Embodiments of the invention provide a motor assembly including a terminal provided at a stator of a motor and electrically connected to a coil wound around the stator, and a controller formed with a coupling hole to which the terminal is coupled and electrically connected and controlling electric input and output to the terminal.

Abstract: A VCM (voice coil motor) is disclosed, the VCM including: a rotor including a cylindrical bobbin for accommodating a lens and protruded at a bottom end with a boss, and a coil block arranged at a periphery of the bobbin; a stator including a magnet facing the coil block and a yoke fixing the magnet; and an elastic member including a first elastic member formed with a through hole coupled to the boss of the bobbin and a second elastic member coupled to an upper end facing the bottom end of the bobbin; wherein the boss is formed with a disengagement prevention unit preventing the first elastic member from being disengaged from the boss, and the first elastic member is formed with a coupling unit contacting a joint where the disengagement prevention unit and the coupling unit meet.