Abstract: An eccentric rotor having a high density member includes a rotor base having an air-core armature coil installation surface, a bearing holder provided at a center thereof, and an air-core armature coil position determination guide formed of a high density member including metal, having a specific gravity of 6 or more and arranged to be eccentric outside of the bearing holder, an air-core armature coil arranged at the air-core armature coil position determination guide, a printed wired commutator member installed to insulate a conductive portion having electric potential from the high density member, and an end connection pattern, in which ends of the air-core armature coil are connected, installed at the printed wired commutator member inside an outer circumference of rotation at a position not overlapping the air-core armature coil.

Abstract: A vibration motor 18 constituted by a motor provided with a weight 57 is covered with a cover 44 having a flat portion for making the cover 44 be sucked easily and a marking for positioning, and this vibration motor is mounted on a main-body printed board 9. In this main-body printed board, line lands and main-body lands also having a function for identification are provided outside the outline of the mounted vibration motor, so that a displacement of the mounting position can be easily detected even visually.

Abstract: A brushless vibration motor includes a base plate unit having a burring element extended from the base plate, and including a shaft having a first portion inserted into the burring element to be fixedly coupled to the base plate, a stator having at least one coil disposed on the base plate through which current flows, a rotor rotatably supported by a second portion of the shaft, and having a bearing slidably inserted around the second portion of the shaft, a bearing holder having an inside surface forcibly coupled to the bearing, and a yoke coupled to the bearing holder and having a magnet mounted on the yoke to be spaced-apart from the coils to generate a magnetic field with the coil, and a counterweight generating eccentricity, and a cover coupled to the base plate to enclose the stator and the rotor.

Abstract: A driver IC and passive parts, which convert a direct current voltage into a three-phase voltage, and an FP coil for cyclically generating a magnetic field through the driver IC are mounted on a flexible substrate, which constitutes a small vibration motor. The driver IC is a so-called bare chip in which a circuit section is exposed and is not molded with resin and the like. Magnets and an unbalance weight are installed on a yoke having a shaft. The FP coil and the magnet are placed so as to face each other. A cover is caulked to fixed to a bottom plate. Thus, the vibration motor can be miniaturized and thinned. Moreover, the vibration motor can be automatically manufactured, and installing them to an electronic apparatus can be automatically performed.

Abstract: An improved vibrating actuator for notifying the user of a call upon signal arrival by any of a buzzer, a speech and a vibration, and a power supply mechanism thereof. The device has high impact resistance by a magnetic yoke having a flange, a damper material is provided between an oscillation plate and a cover to prevent generation of noise, and a hole is provided in the cover to change acoustic characteristics as required within the same frequency band. As a power supply mechanism for ensuring electrical connection, a projecting electrical connection terminal is provided on the actuator side, and a conductive material touching with the electrical connection terminal is provided as a power supply terminal electrically connected to a power supply section of a circuit board.

Abstract: Disclosed is a brushless vibration motor having a driving circuit therein, which is capable of operating like a typical DC motor. The brushless vibration motor comprises an eccentric rotor R having an eccentric weight 5b, a rotor case 5 and a magnet 6 which has a plurality of magnetic poles arranged in the rotor case; a shaft 2 for supporting the eccentric rotor, a housing H for supporting the shaft, a stator S which is disposed around the shaft on a stator base 1 constructing a part of the housing and which consists of armature coils to drive the rotor, and a driving circuit member 1c which is mounted in a space K corresponding to an area of at least one armature coil.

Abstract: A vibration generator system is capable of generating vibrations of a frequency that can be bodily sensed by humans, notwithstanding a small size, and making setting of a configuration of vibrations easy. When a drive signal composed of a set of an accumulation signal and a damping signal is given as a natural frequency of a movable body, a vibrational waveform of the movable body makes an envelope. Since a frequency of the envelope is in a lower frequency band than the natural frequency of the movable body, humans can surely sense vibrations. When the number of and a current quantity of excitation signals and reverse excitation signals included in the accumulation signal are changed and the number of and a current quantity of inhibition signals and reverse inhibition signals included in the damping signal are changed, the envelope can be changed in frequency and amplitude, so that it becomes possible to generate a variety of vibrations.

Abstract: A vibration type brushless motor A1 in a structure of brushless motor having an outer rotor type core is composed of a shaft 3 of which a bottom end 3a is held by a bearing member 6 so as to rotate freely and a top end 3b is fixed to a center of rotation of a rotor yoke 1, a ring core 4 arranged around the shaft 3 and a rotor yoke 1 having a side section 1b of which a part is cut off radially to the outer circumference direction from the center fixed with the top end 3b of the shaft 3, wherein a semi-annular magnet 2 is fixed to the rotor yoke 1 along the side section 1b with facing the ring core 4.

Abstract: The present invention aims at providing a motor which can stably be mounted on a circuit board when being assembled into an instrument in particular. The motor 1 in accordance with the present invention comprises a motor body A, an output shaft 3 projecting from a front end of the motor body A, and a voltage-supplying terminal 8 provided in the motor body A, the terminal 8 having an elastic force in a direction substantially orthogonal to the output shaft 3 and also having a grounding portion 14 disposed near a rear end of the motor body A.

Abstract: A vibration motor having a rotor and a stator is provided. The vibration motor includes a commutator mounted on the rotor and a brush mounted on the stator. The brush is line contact with the commutator of rotor in order to maintain a stable contact between the commutator and the brush and to reduce spark between the commutator and the brush due to the stable line contact between the commutator and the brush.

Abstract: In order to reduce the number of parts and decrease the thickness of each part, while still obtaining a sufficient strength, with a simple structure, an eccentric rotor R in which an axial-air-gap magnet 8 and an arched weight 9 are provided in a rotor yoke 6 is rotatably mounted on a shaft 2 fixed to a yoke bracket 1, and a stator base 3 is attached as an auxiliary component to the yoke bracket comprising a magnetic portion 1b receiving the magnetic field of the magnet and a nonmagnetic portion 1e. One Hall sensor H and a drive circuit member D for receiving the output of the Hall sensor are disposed so that they do not overlap, in a plan view thereof, the stator base 3 having single-phase air-core armature coils installed thereof, and a cover member 10 covering those components is welded at the opening portion to the outer periphery of the yoke bracket.

Abstract: An amount of movement of an air passing through a clearance G2 is adjusted by adjusting the clearance G2 by placing an outer shape surface 35 of a yoke 3 in proximity of an inner side surface of a housing 1. Accordingly, a vibration characteristic having a wide frequency bandwidth can be obtained, thereby improving stability and convenience of body-sensible vibration characteristic of a multifunctional vibration actuator.

Abstract: The invention provides an electroacoustic transducer such as a speaker, a headphone, an earphone, a microphone, an acoustic wave sensor, etc., which is able to set a distribution of magnetic fluxes capable of uniformly driving the entire diaphragm in a wide range of a conductor formed on the diaphragm and with respect to the vibration direction thereof, does not require any high machining accuracy during production, and is able to efficiently convert electric signals into sounds or sounds into electric signals at a low distortion level.

Abstract: A vibrating assembly comprises a yoke having a center pole and a peripheral flange, an annular permanent magnet secured to the flange, and an annular top plate secured to the permanent magnet. A supporting plate is provided for resiliently supporting the vibrating assembly in the frame. A preventing means is provided for preventing the vibrating assembly from moving in a radial direction of the vibrating assembly.

Abstract: A vibration motor 18 constituted by a motor provided with a weight 57 is covered with a cover 44 having a flat portion for making the cover 44 be sucked easily and a marking for positioning, and this vibration motor is mounted on a main-body printed board 9. In this main-body printed board, line lands and main-body lands also having a function for identification are provided outside the outline of the mounted vibration motor, so that a displacement of the mounting position can be easily detected even visually.

Abstract: A highly precise coreless motor with improved precision of assembly in which weight is reduced by reducing the metal parts and reduction of assembly processes and time by means of a smaller number of parts brings down costs. There is a cylindrical external housing 1 with a through hole 1c in a central position in the closed end. A molded resin body 3 is molded into place through the through hole 1c of the external housing 1; one end is a bearing 3a that supports the rotating shaft, and it continues on the coaxial position of the rotating shaft to become a bearing housing 3b that is fitted into place. The molded resin body 3 is the base on which both the rotor and the stator are assembled.

Abstract: A magnetic assembly structure includes a magnetic yoke connected to a first lead frame and separated at a connection portion of the yoke, at least one solderable feeder terminal connected to a second lead frame thinner than the first lead frame and separated from the yoke at a connection portion of the second lead frame, at least one feeder terminal electrically insulated from the yoke, a resin base insulating the yoke from the terminal, the connection portion of the yoke not protruding outside the base, and an annular magnet surrounding the yoke.

Abstract: In an apparatus (1) having an electroacoustic transducer (12) which includes a magnet system (13) generating a useful magnetic field and a stray magnetic field, a sound generating coil arranged in the useful field to associate with a diaphragm for generating an acoustic sound wave, and at least one movably mounted vibration generating coil (36, 37) arranged in the stray field area of the magnet system (13) for generating vibration perceptible by a user, the vibration generating coil (36, 37) being preferably also connected to a metal part (38) which consists of a soft-magnetic material.

Abstract: The present invention provides a disc-shaped eccentric rotor having at least two air-core coils. The rotor includes a flat commutator member having a central shaft insertion through hole, commutator land segments arranged around the shaft insertion through hole on a first side of the flat commutator member, wound air-core coil arrangement guides located around the shaft insertion through hole on a second side of the flat commutator member, air-core coil end portion connection lands arranged circumferentially on the second side of the flat commutator member, a shaft holder installed around the shaft insertion through hole on the second side of the flat commutator member, and wound air-core coils installed at the wound air-core coil arrangement guides and having end portions connected to the air-core coil end portion connection lands. The air-core coils of bigger sizes are uniformly arranged on the commutator member, so that high efficiency and easy Installation can be achieved.

Abstract: A motor includes a motor-base-holder which comprises (a) a base, (b) a bearing supporter vertically protruded from the base for supporting a bearing, (c) a stator supporter concentric with the bearing supporter for being mounted with a stator, (d) a motor base having terminals made of a metal plate and insert-molded around the bearing supporter, and (e) a frame made of the same metal as the terminals and linked to fringe of the motor base. This structure solves difficulties of mini-motors such as difficulties of handling the motor, difficulties of mating those elements each other, and time-consuming bonding action. A method of assembling the same motor achieves high productivity.

Abstract: An electronic device including a vibration generator having an eccentric weight member attached to the output of a motor. The motor is accommodated into a bracket made from elastic material, and the bracket is held in a casing. The bracket has a prism-shaped body, and has a through hole in which the motor is tightly fitted formed the central portion of the body, and the peripheral wall defining the through hole is formed with a slit cut from one end face of the body to a central portion of the body in a specified depth. Accordingly, the vibration generator is accommodated into the bracket with great ease. Moreover, the motor of the vibration generator is unlikely to change easily its rotating angle posture in the interior of the bracket while the bracket is assembled into a casing.

Abstract: A motor includes a motor-base-holder having (a) a base, (b) a bearing supporter vertically protruded from the base for supporting a bearing, (c) a stator supporter concentric with the bearing supporter for being mounted with a stator, (d) a motor base having terminals made of a metal plate and insert-molded around the bearing supporter, and (e) a frame made of the same metal as the terminals and linked to fringe of the motor base. This structure solves difficulties of mini-motors such as difficulties of handling the motor, difficulties of mating those elements each other, and time-consuming bonding action. A method of assembling the same motor achieves high productivity.

Abstract: In a miniature electric motor for generating vibration, an output portion of a rotary shaft is formed into an irregular shape in cross-section other than a circular shape in cross-section. An engaging hole having a predetermined shape in cross-section, which corresponds to the irregular shape in cross-section of the output portion and which makes a vibrator to be kept under a relatively non-rotatable condition to the rotary shaft, is formed in the vibrator. The output portion is engaged with the engaging hole and the vibrator is positioned and held in a thrust direction relative to the output portion to thereby fix the vibrator to the rotary shaft. This motor is used as a vibration generator for a mobile phone and the like.

Abstract: A rotor structure of a motor is provided. The rotor structure includes a magnet having a first annular wall, a magnet holder having a base and a second annular wall connected with the first annular wall of the magnet for fixing the magnet, a shaft having one end mounted through the base of the magnet holder, and a stopper mounted in the other end of the shaft.

Abstract: A cup-shaped yoke is axially movably provided in a cylindrical frame, and a cylindrical permanent magnet is securely provided in the yoke. A coil bobbin is cantilevered in the frame and inserted in a space between the yoke and the permanent magnet, and a driving coil is mounted on the coil bobbin. The yoke is held by a pair of coil springs for resiliently holding the yoke in the frame.

Abstract: In order to provide a vibration motor which can make a starting force strong with maintaining saving electric power and increase a vibration force, in the vibration motor, a facing gap between a central salient pole and a pair of auxiliary salient poles are shifted and arranged around a rotating shaft with non-centrosymmetry and a facing gap between the central salient pole and the field magnet is formed narrower than facing magnets between the auxiliary salient poles and the field magnet. Further, an exciting force of the central salient pole is greater than that of the auxiliary salient poles and in starting, the same magnetic pole as the magnetic pole of the field magnet generates in a facing surface of the central salient pole and a repulsive force occurs so that the armature core is urged to rotate.

Abstract: A portable device integrates a small dc motor. The mounting structure of the motor allows an easy installation of the motor and to lower an electric noise level substantially. An insulating first elastic member and a conductive second elastic member are disposed around outside of a motor frame. While leaf-spring type motor-terminals are conductive to feeding terminals of a device, the motor frame is shorted by the second elastic member to a grounding terminal of the device.

Abstract: A compact flat type vibrator motor is provided in which movement of the center is secured in the commutator itself, an additional eccentric member does not need to be provided, and the number of parts are reduced, so that mass production thereof is possible. The commutator pieces are formed in a commutator base member including a printed wiring board to which a high density resin of a specific gravity of 3 or more is added. Simultaneously, a shaft receiving portion is formed at the central portion of the commutator base member. At least a high density resin portion is made eccentric so that an eccentric rotor is formed.

Abstract: An electromagnetic sound generator is proposed that can be easily and inexpensively fabricated for producing an indicating sound to enable use in an automobile or other similar environment. A spool (2) on which a coil (3) has been wound, a core (4) that is movable up and down, and a round spring (5) are installed inside a cup-shaped yoke (1); whereby supplying or cutting off the supply of current to the coil (3) causes the core (4) to strike, in single beats in accordance with drive, against the yoke (1) itself or on the side of spring (5) to produce a sound. The yoke (1), which is the magnetic circuit for driving, also serves as a sound generator, and the provision of openings such as slits in the upper surface and side surfaces of the cup-shaped yoke (1) enhances sound effects such as the tone, volume and direction of emission of the generated sound.

Abstract: A motor includes a surface mountable motor base having (a) a base, (b) a bearing supporter extending from the base for supporting a bearing, (c) a stator supporter concentric with the bearing supporter for supporting a stator, and (d) a terminal for connection to a winding of the stator, the terminal exposed on a bottom of the motor base and extending substantially parallel to the base. This structure solves difficulties of mini-motors such as difficulties of handling the motor, difficulties of mating those elements with each other, and time-consuming bonding. A method of assembling the same motor achieves high productivity.

Abstract: There is a roughly rectangular housing that is narrower in one direction, with a pair of suspensions having two arms that are located in the narrow space of the housing and attach to the main part that supports the electromagnetic circuit and that extend gradually outward from the attachment on the main part of the suspension in the same or crossing directions, with the tips of the two arms of each suspension set in the narrow walls of the housing, such that the electromagnetic circuit can vibrate in the two suspensions.

Abstract: The present invention relates a vibration generating motor providing simple and fast assembly, and ready recycling. A motor includes a plurality of rotors around a rotary shaft, a plurality of coil winding portions on respective rotors, and a coil on each respective coil winding portion. At least a two part weight is positioned between selected coil winding portions and has an seperably upper and lower part, allowing weight maximization at low cost while conserving space.

Abstract: A DC brushless vibration motor is disclosed to comprise of a stator, a rotor, a drive circuit and a casing. The stator has an upper magnetic pole piece, a lower magnetic pole piece and a stator field winding. The stator field winding is contained inside a ring-shaped space formed by the upper and lower magnetic pole pieces. The internal rotor has a center of mass offset from the center axis of rotation and comprises a ring magnet and an eccentric weight. The eccentric weight has a structural configuration of a ring body, and the ring magnet is securely fixed to the external peripheral surface of the eccentric weight. The drive circuit has a drive integrated circuit for controlling the rotation of the rotor by receiving an externally-supplied electric power. The casing securely encloses the stator and rotor while maintaining an air gap therebetween for generating mechanical vibration when the rotor is propelled to rotate by the stator.

Abstract: An eccentric rotor includes an eccentric printed wiring commutator device having first and second surfaces, an expanded fan shape when viewed in a plane, a central hole for shaft installation, and a plurality of segment patterns at a periphery of the first surface; a wound, non-molded air-core armature coil incorporated in an air-core armature coil position determination guide protruding from and eccentric at the second surface of the printed wiring commutator device; an end connection portion located at an outer circumferential portion of the printed wiring commutator device for latching an end portion of the wound armature coil within a range not deviating from a turning circumference and simultaneous electrical connection with the segment patterns is possible, and not overlapping the wound armature coil when viewed in a plane; a resin bearing holder inserted in the shaft installation hole with a first part protruding toward the segment pattern and, simultaneously, a second part extending toward the second

Abstract: A motor includes (a) a cylindrical frame made of ferromagnetic material, (b) a pipe fitted in and disposed within the frame concentrically, (c) a sintered bearing press-fitted into the pipe, (d) a cylindrical magnet fixed on an outer wall of the pipe at an inner wall of the magnet, and (e) a cylindrical coil facing the magnet via an annular space, where the frame and the pipe are welded at a fitted section therebetween. This structure allows the motor to withstand a strong enough shock. An apparatus requiring a vibration motor can employ this motor having a large vibrator, so that great vibrations are available for the apparatus. As a result, the apparatus—utilizing the great vibrations as various functions—is obtainable.

Abstract: A flat type vibration motor provides a weight on a round shaped upper substrate and a portion corresponding to a winding coil arranged at one side of the upper substrate to prevent the eccentric amount from being reduced due to a slim thickness of a rotor, thereby facilitating a slim size of the motor.

Abstract: There is provided a vibrator which is integrally coupled to a rotating shaft of a motor. A groove portion in which the rotating shaft is fitted is formed in an eccentric load portion, and side walls extending from the eccentric load portion and forming both side edge portions of the groove portion are provided. A portion of a tip portion end surface of each side wall, except at an outer peripheral portion of the side wall and at a side of the groove portion, is caulked from an opening side of the groove portion toward a bottom side thereof, so that the vibrator is integrally coupled to the rotating shaft.

Abstract: A DC motor has a conductive case and an arrangement for electrically connecting the shaft and case of the DC motor that is grounded. The arrangement includes a conductive member and a pressing member that presses the conductive member against the shaft, thereby grounding the shaft.

Abstract: An electromagnetic propulsion fan includes a hub and a plurality of fan blades coupled to the hub. The electromagnetic propulsion fan also includes a rim coupled to the fan blades such that rotating the rim causes the fan blades to rotate. The rim includes a plurality of magnets coupled thereto. The electromagnetic propulsion fan further includes a plurality of electromagnets in proximity to the rim, the electromagnets controllable to generate magnetic fields that interact with the magnetic fields of the magnets to cause the rim to rotated.

Abstract: A vibration-generating device having a weight that is formed semicircular in section and has a recess near an insertion hole of a shaft. The weight, after being inserted onto the shaft, is supported in an inclined position by a support member. A pressing member applies a pressure to the recess. Preferably, the pressure is offset from the rotational axis of the shaft.

Abstract: A portable telephone is designed to realize portable telephone functions and game device functions, particularly music games, which are embodied by a vibration device such as a vibration sensor and a vibration motor. When the user swings and vibrates the portable telephone like a maraca in synchronization with the rhythm of a prescribed musical tune, the vibration device produces vibration pulses, which are compared with rhythm pulses. Then, a score is marked on user's operation to swing the portable telephone on the basis of time differences detected between the vibration pulses and rhythm pulses and is displayed on the screen of a display.

Abstract: Disclosed is a vibration motor.

Abstract: A vibratory motor for a vibratory screening machine including a housing having a main shaft mounting outer shafts at its ends with a slip connection therebetween, bearings mounted on the outer shafts, first lubricant chambers on opposite sides of each of the bearings with a conduit therebetween, eccentric weights on the opposite sides of each bearing in each of the first lubricant chambers, second lubricant chambers outwardly of the first lubricant chambers, ducts between each outermost first lubricant chamber and an adjacent second lubricant chamber, second conduits between the second lubricant chambers, and conduits including the hollow portion of the main shaft and bores in the main shaft and outer shafts for conducting lubricant from the second lubricant chambers to the bearings.

Abstract: A discoidal brushless DC motor having a stator (507) carrying windings (503) arranged in slots which radiate out from the center of the stator to the periphery. The depth of each slot increases towards the center of the stator. The slot, therefore, is wider (from side to side) and shallower towards the periphery of the stator, and narrower (from side to side) and deeper towards the center of the stator. This arrangement ensures that the windings are contained below the surface (504) of the stator (507). The magnetic circuit includes a backing of a ferromagnetic material (509). This ferromagnetic material (509) can be a watch spring core made from a long strip of soft iron tape.

Abstract: The invention is to provide a micro vibrating motor which includes a weight block having a coupling portion thereon to receive a rotary shaft disposed at an end edge of a motor, and a weld portion provided at the connecting edges of the coupling portion and the rotary shaft enabling the weight block and the rotary shaft to be coupled firmly.

Abstract: A vibrating assembly comprises a yoke having a center pole and a peripheral flange, an annular permanent magnet secured to the flange, and an annular top plate secured to the permanent magnet. A supporting plate is provided for resiliently supporting the vibrating assembly in the frame. A preventing means is provided for preventing the vibrating assembly from moving in a radial direction of the vibrating assembly.

Abstract: A DC brushless voice-coil vibration motor, especially a small-sized micro-vibration motor that utilizes inductance coils and a weight object with a plurality of coplanar magnetic poles as the stator and rotor of the motor. The invention comprises a circuit board, at least two inductance coils and a weight object. The weight object is installed on the inductance coil and away from the motor center. It has a plurality of magnetic poles as the rotor of the motor. When current flows through the inductance coil, a magnetic field is generated so that the weight object starts to rotate under the electromagnetic interactions. Since the weight object is off the motor center, the motor gains vibrational energy during the rotation of the weight object.

Abstract: An axial directional gap type eccentric rotor having a stop position maintaining unit includes a commutator in which at least one air-core armature coil is arranged, a arc-shaped protruding portion installed at the outer circumference of the commutator so that at least part thereof faces the outer circumference portion of a donut-shaped magnet at the side of a stator, and an arc-shaped weight having magnetism arranged at least at part of the arc-shaped protruding portion. Thus, cost is lowered by reducing the number of the air-core armature coils. The loss of the main magnetic flux is prevented, without sacrificing a gap, by installing a weight having magnetism at a leakage magnetic flux portion. Also, the eccentric rotor can be moved or stopped at a position where the maximum torque is generated.

Abstract: A slim motor good for a portable device includes a frame, pipe, magnet, coil, shaft, first bearing and a second bearing (inside bearing). The pipe is disposed on an inner wall of the cylindrical magnet, and an outer diameter of the second bearing is set at approx. the same as that of the pipe. The second bearing is aligned to the pipe in an axial direction and fixed on the inner wall of the magnet. This structure allows the magnet to extend axially long enough, and solves conventional problems including power consumption, slant of the shaft, motor efficiency, productivity and the like, thereby contributing to achieving a slimmer motor and a slimmed-down device.

Abstract: One end of a shaft is fixed to a first portion of a housing. An eccentric rotor is located in the housing rotatably on the shaft. The other end of the shaft is fitted into a concave portion on a second portion of the housing, so the rotor may be assembled in the housing in a simple manner and radial movement of the shaft can be prevented without enlarging the fixing portion of the shaft. Even if the diameter of the shaft is small, the shaft can withstand an impact resulting from dropping of the motor.