Abstract: A stator (2) is fixed to a casing (1). Bearing supports (5, 6) are fixed to the casing (1), and a rotary shaft (4) is rotatably supported by the bearing supports (5, 6) through bearings (7, 8). A rotor (3) is fixed to the rotary shaft (4), and an orbiting shaft (9) is supported eccentrically and rotatably by the rotary shaft (4) through bearings (10, 11). An upper end of the orbiting shaft (9) is protruded out of the casing (1). An orbiting plate (12) is fixed to the lower section of the orbiting shaft (9), and an Oldham's ring (13) having protrusions (14, 15) is provided between the bearing support (6) and the orbiting plate (12). Grooves (16, 17) orthogonal to each other are provided in the bearing support (6) and the orbiting plate (12), respectively, and the grooves (16, 17) are engaged with the protrusions (14, 15).

Abstract: A vibration-generating device includes a motor stored in a housing such that a rotating shaft projects from the housing. A weight is attached to the rotating shaft and a coil spring which serves as an elastic member is wound around the rotating shaft. One end of the coil spring is attached to a shaft and the other end to a restraining projection. When the rotating shaft and the weight reciprocate, the housing vibrates due to an impact which occurs every time the moving direction of the weight is reversed. When a stepping motor is used, an impact occurs and damping vibration is generated due to the impact when a driving pulse is applied to control the motor. Accordingly, the housing vibrates due to this impact or the damping vibration. In addition, rotation control is easily performed and various vibrations are obtained by changing the vibration frequency and amplitude.

Abstract: In a rotor having a printed wiring commutator member as a printed wiring board in which a shaft installation hole is installed at the center of a printed wiring board, at least six segment patterns separated by slits are formed around the shaft installation hole, and simultaneously, at least three conductive bodies connect every two other segment patterns, terminal connection patterns are arranged at the outer circumference of the printed wiring board, a printed wiring commutator member is formed, not by through hole plating, as a means for forming the at least three conductive bodies for connecting every two other segment patterns, a plurality of air-core armature coils are installed at the side opposite to the segment patterns, and terminals of the air-core armature coils are connected to the terminal connection patterns through notches arranged at the outer circumference.

Abstract: Vibrator attaching structure is provided in which the working efficiency at the assembly time and the disassembly time is good, the required arrangement space is made small, and a device can be miniaturized. A vibrator-attaching base (20) has at its lower portion a shield case (22) that is a box-shaped base member functioning also as a shield member on a print circuit board (10). At the upper portion of this shield case (22), a holder (26) that is a holding member is integrally formed.

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: A variable reluctance motor includes a phase assembly (102, 801) having more than one phase unit (121, 122, 123, 821, 822, 823), each of said phase units comprising at least one module (131, 132, 831, 832), each said module comprising an electrically conductive coil (140, 840) wound around the module in one or more windings, each of said phase units being magnetically isolated from every other phase unit, each of said phase units defining a flux path. The motor further includes a ferromagnetic core (101, 810) within the flux path.

Abstract: A brushless motor driving circuit is disclosed which includes an initializing element setting an initial rotating speed, an oscillating element for generating a frequency corresponding to the initial rotating speed set by the initializing element, a frequency controlling element for causing the frequency generated by the oscillating element to change from the frequency corresponding to the initial rotating speed to a frequency corresponding to a constant rotating speed, a driving signal generating element for generating driving signals having a plurality of phases based on the generated frequency of the oscillating element, and a driving element for driving coils having a plurality of phases based on the driving signals having the plurality of phases generated by the driving signal generating element.

Abstract: The present invention relates to an electromagnetic vibrator of variable reluctance type, according to a new principle which provides higher efficiency, smaller dimension, and higher reliability compared to known technology. This has been obtained by the magnetic signal flux around the coil is closed through a bobbin body and a yoke and through air gaps formed between bobbin body and yoke(s) where a static flux from one or more of the permanent magnets and the signal flux cooperates so that static forces are outbalanced and so that axial signal forces are generated. The new vibrator principle has been names: Balanced Electromagnetic Separation Transducer (BEST).

Abstract: The flat-typed vibration motor comprises a lower case; an upper case covering one side of the lower case; a shaft connecting and supporting the lower case and the upper case; a magnet attached to an upper surface of the lower case; an upper board eccentrically and rotatably supported by the shaft and having a commutator formed with a plurality of segments, the commutator formed in a lower surface of the upper board; a plurality of winding coils spaced at a predetermined angle to each other, and an insulator of a typical resin for fixing the winding coils, the winding coils and the insulator being arranged on one surface of the upper board; and a lower board for covering the lower case, the lower board having one end connected to a brush contacted with the commutator and the other end exposed downwardly from the lower case and comprised of a solder land formed in a regular spacing.

Abstract: Disclosed is a flat coreless vibrator motor for supporting a vibration calling mode in a mobile communication device. The invention provides a flat coreless vibrator motor capable of preventing the formation of an idle point, thereby obtaining a high average torque, and thus, a high efficiency, while providing a sufficient redundant space for installing a weight for an increased centrifugal force. The flat coreless vibrator motor comprises a stator including a flat field magnet having a plurality of alternate N and S magnetic poles, a rotor spaced apart from the field magnet by a predetermined distance to rotate freely, and a brush for supplying a current to the coils via the commutator of the rotor. The rotor includes at least three coreless armature coils and a commutator connected to the coils, and at least two of the armature coils are integrally formed together at a same position to form a non-coil section in the rotor.

Abstract: Disclosed is a vibration motor.

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 is possible. The commutator pieces are located in a commutator base member including a printed wiring board having a portion to which a high density resin of a specific gravity of 3 or more is added. A shaft receiving portion is centrally located in the commutator base member. The high density resin portion is eccentric so that an eccentric rotor is formed.

Abstract: The invention relates to a regulating device for an unbalanced mass vibration generator, comprising at least two pairs of partial unbalanced mass bodies that can be driven around an allocated axis whose vectorially added partial centrifugal force vectors form the resulting centrifugal force vector. Adjustment is carried out between a resulting minimal unbalance moment (amplitude of oscillation=minimal) and a resulting maximal unbalance moment (amplitude of oscillation=maximal) without any intermediate positions, whereby both allocated limiting phase angles are regulated using two stops. The regulating device also enables acceleration and stopping of the vibrator with a regulated minimal unbalance moment. The regulating device selectively utilizes one or two drive motors for regulating the phase angle. Due to the utilization of stops in adjusting the phase angle, it is no longer necessary to use complicated control means and a compact structure is made possible.

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: 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: The present invention has been devised in order to raise driving efficiency of the vibration wave driving apparatus. A vibration member of a vibration wave driving apparatus of the present invention comprises the vibration member constituted of an elastic member and an electromechanical energy conversion element, and a rotor contacting the vibration member, and the vibration member generates a travelling wave in the elastic member when an alternating signal is applied to the electromechanical energy conversion element, in which an electrode film provided on a surface of the electromechanical energy conversion element of the vibration member is divided into a plurality of circular areas with different radiuses and each circular area is divided into a plurality of electrodes along its peripheral direction.

Abstract: A direct current brushless type vibration motor primarily includes a cylindrical housing having a bottom provided with a pivot hole, and a top having an opening end. A stator seat is fixed in the inner wall of the housing, and is provided with coils and poles. The poles of the stator seat mate with the permanent magnet of the rotor. The rotor has a shaft whose two ends are respectively pivoted in the pivot hole of the bottom of the housing, and the pivot hole provided by the cover plate and the circuit board that close the opening end of the housing. The shaft has an integral permanent magnet and an eccentric member. The circuit board is fixed in the housing and has a sensing drive circuit.

Abstract: A slim cylindrical coreless motor for mounting in a device without using an additional mounting element. The slim cylindrical coreless motor has a cylindrical case having a bearing holder at a first end and an end bracket fitted to the second end of the cylindrical case. The slim cylindrical coreless motor has first mounting portions extending outward from the first end of the cylindrical case and second mounting portions extending outward from the end bracket. The first and second mounting portions do not extend beyond the circumference of the case, and at least one of the first and second mounting portions is a power supply terminal. In addition, a weight is eccentrically mounted on a shaft extending out of the case, which enables the motor to be used as a vibrator motor. The weight has a recess near the first mounting portions.

Abstract: An electromagnetic vibrator includes a movable body producing vibration by revolving motion or reciprocating motion with respect to its center axis through being powered from the outside. The vibrator also includes an outer shell supporting the moving body and having two mounting faces, one being vertical and the other being parallel to the center axis. A portable device employs this electromagnetic vibrator. This structure allows the portable device to gain vibration in either direction, thereby increasing the versatility of the device. When a plurality of the electromagnetic vibrators are mounted to a device with their center axes in different directions or in the same direction, vertical and lateral vibrations can be produced at the same time, so that the device owns complex vibration modes and performs versatile functions.

Abstract: A fixing stricture of a miniature vibration motor includes a circuit board having a sensor, a conducting line, conducting connecting points, and a shaft hole. The conducting connecting point on the circuit board is soldered to the line connecting point of the seat plate, so that the circuit board is fixed and combined on the seat plate. A pivot shaft in turn passes through the shaft hole of the housing, the shaft hole of the rotor, and is positioned in the shaft hole of the circuit board. The rotor has a permanent magnet induced with the poles of the stator seat. The stator seat is wound with a coil, and is connected to the conducting line of the circuit board by a drawing wire. The housing receives the stator seat and the rotor therein.

Abstract: A motor includes a stator and a rotor facing the stator. The rotor has a magnet and an eccentric weight. The magnet is magnetized in a rotational direction and produces driving magnetic field. The eccentric weight is made of the material having a greater specific gravity than the magnet. The magnet shapes in a cylinder and a part of the cylinder is cut away to form a space. The eccentric weight is placed in the space. A rotational area of the magnet and that of the eccentric weight overlap each other. In this structure, rotation of the rotor spins the eccentric weight, thereby producing large vibrations. The eccentric weight is accommodated by a motor housing for the safety. The thin and compact motor is thus obtainable.

Abstract: A miniature vibration motor structure includes an upper plate and a lower plate each having a seat hole for receiving each of two ends of a shaft column in a non-tight fit manner. The shaft column passes through the shaft hole of the bearing of the rotor in a loose fit manner. The annular permanent magnet is integrally formed on an outer periphery of the bearing. Thus, when the rotor is rotated, the center of gravity and the center of rotation of the rotor are not at the same central line. The stator seat wound with a coil has poles which may be induced with the permanent magnet of the rotor, so as to drive the rotor to rotate.

Abstract: A miniature vibration motor structure includes a housing having a hole for receiving and positioning one end of a shaft whose other end is positioned in a fixing plate. A rotor includes a bearing integrally combined with an annular permanent magnet. The bearing of the rotor is supported and rotated on the shaft. The bearing or the annular permanent magnet is provided with a recess or protruding block, so that the center of gravity and the center of rotation of the rotor are not in concert with each other. A stator seat is wound with a coil and has a power inlet for supplying an electric power into the stator seat. The stator seat has poles which may be induced with the permanent magnet of the rotor.

Abstract: An unbalance weight of a vibration motor includes a rest section for receiving a rotary shaft and a caulking section for caulking the unbalance weight to the rotary shaft. The rotary shaft includes a recess at a place corresponding to the rest section. Caulking strength applied to the caulking section forces parts of the weight to bite inside of the recess, thereby fixing the weight to the rotary shaft. This structure allows the rotary shaft to hold the weight tightly. The vibration motor can be mounted to a radio paging-device or a cellular phone, so that the user can sense the vibrations to be informed of a calling or a message arrival. The vibration motor is thus suited for a source of vibrations.

Abstract: A assembling structure of a miniature vibration motor includes a seat plate provided with electronic elements, a sensor, and connecting points. A conducting line is provided between the sensor and the connecting points. The seat plate is formed with a shaft hole for fixing of a pivot shaft that passes through the shaft hole of the housing and the shaft hole of the rotor. The rotor has a permanent magnet induced with the poles of the stator seat. The stator seat is wound with a coil, and has connecting legs connected to the connecting points of the seat plate. The housing may be fixed on the seat plate.

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 flat-type vibration motor comprising a lower casing part, an upper casing part for covering the lower casing part, a shaft for interconnecting the lower casing part and upper casing part at their centers, a lower board attached to an upper surface of the lower casing part, a magnet mounted on an edge of the upper surface of the lower casing part outside the lower board, the magnet being polarized with at least 2 poles, an upper board formed by cutting a disc at a certain angle and supporting the resulting disc by the shaft via a bearing such that it is eccentrically rotatable, a commutator arranged on a lower surface of the upper board and around an axis of the shaft, the commutator having segments of the number twice that of the poles of the magnet, a pair of brushes having their one ends fixedly connected to the lower board and their other ends brought into contact with the commutator, the brushes being spaced apart from each other at an interval of an electrical angle within the range of &pgr;/2 to 3&pgr

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 vibrator module adapted for use in a taper apparatus for advancing carrier tape having a plurality of compartments and for placing parts in the compartments. The vibrator module includes a motor that includes an output shaft that rotates in response to operation of the motor. The vibrator module also includes an eccentric weight mounted to and rotatable with the output shaft. The eccentric weight causes the motor to vibrate in response to rotation of the output shaft and eccentric weight. The vibrator module further includes a vibration transferring member interconnected with the motor and operable to transfer vibrations from the motor to the carrier tape to cause the parts to settle into the bottoms of the compartments.

Abstract: The motor as a whole is made smaller and lighter with a fixed shaft (10) as the main part, with this fixed shaft (10) inserted through and fixed to the center of a field magnet (11a) such that the field magnet (11a) placed roughly in the middle of the center axis of the fixed shaft (10) makes up the stator (11). The outer periphery of this field magnet (11a) is encompassed by the inner diameter of a cylindrical coil (12a), separated by a gap (G). Rotor plates (12b, 12c) are fitted so as to be free to rotate around the central axis of the fixed shaft (10) on both sides of the field magnet (11a), and these rotor plates (12b, 12c) are fitted into the ends of the coil (12a) and with it make up the rotor (12). A cylindrical yoke (13) is placed around the outer periphery of the coil (12a) and forms a single unit with it, and eccentric plates (14) around the outer periphery of the yoke make up the eccentric weight.

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: An electromagnetic vibrator includes a vibration generating mechanism; a case for containing at least part of the vibration generating mechanism; a power supply terminal for supplying power to the vibration generating mechanism, protruding from the case; an elastic body covering at least part of the case; and an elastic pressing body deformable under pressure, formed in part of the elastic body. When the electromagnetic vibrator is incorporated into a device, part of the device presses the case. Correspondingly, the elastic pressing body presses the power supply terminal toward a power supply land disposed on the device side, and the power supply terminal contacts the power supply land thereby electrically connecting itself to the power supply land. With this construction is provided a highly reliable electromagnetic vibrator and device incorporating the electromagnetic vibrator with electric connections having high vibration resistance and impact resistance.

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 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 motor includes (a) a stator having a stator core wound with a coil, (b) a rotor having a magnet facing the stator core via an annular space and a yoke disposed on an outer wall of the magnet, and (c) an unbalancing weight disposed on an outer wall of the yoke. This structure allows the motor to be small in size, light in weight, thin, flat and to function as a vibrating motor producing maximum vibration at low power consumption. The motor thus contributes to realizing a portable device with a small size, a low weight, and which is operable for many hours.

Abstract: A vibrating toothbrush includes a power source with a charging coil or bobbin wrapped thereabout. The power source is attached to a motor that is directly and rotatably connected to a rotatable magnet. The rotatable magnet has a plurality of alternating pairs of magnetic poles and is adjacent a permanent magnet. The permanent magnet is disposed on a first end of a lever arm with a brush attached to the other end of the lever arm. The rotation of the motor causes the rotatable magnet to rotate. The alternating polarity of the magnetic poles on the rotating magnet results in the permanent magnet oscillating, which in turn oscillates the lever arm and vibrates the brush on the second end of the lever arm.

Abstract: Brushless motors for portable information equipment that can be simultaneously reflow-soldered to a substrate and efficiently and densely mounted thereon in such a way that the coupled portion between the motor and the substrate has a high impact resistance, thereby providing small and reliable portable information equipment having a high productivity.

Abstract: A case 1 is formed of thermoplastic resin, and includes an upper case 11 and a lower case 21. The case 1 accommodates a pole piece 31, a coil 41, a magnet 51, a diaphragm 61, and so on. The pole piece 31 includes an core 32 and a base 33, and placed on the lower case 21. There are integrally formed on an upper face of the lower case 21, a wall 22 for defining a mounting position of the pole piece 31, a projection 23 for preventing a conductive wire 42 drawn our from the coil 41 from getting in touch with the base 33, and a bobbin part 24 for the conductive wire 42 to be wound therearound. A height of the projection 23 is set at an equal or larger value to or than a height of a surface of the base 33, and a contact of the conductive wire 42 with the base 33 can be avoided by the projection 23.

Abstract: The flat-typed vibration motor comprises a lower case; an upper case covering one side of the lower case; a shaft connecting and supporting the lower case and the upper case; a magnet attached to an upper surface of the lower case; an upper board eccentrically and rotatably supported by the shaft and having a commutator formed with a plurality of segments, the commutator formed in a lower surface of the upper board; a plurality of winding coils spaced at a predetermined angle to each other, and an insulator of a typical resin for fixing the winding coils, the winding coils and the insulator being arranged on one surface of the upper board; and a lower board for covering the lower case, the lower board having one end connected to a brush contacted with the commutator and the other end exposed downwardly from the lower case and comprised of a solder land formed in a regular spacing.

Abstract: A vibration generator comprises a first vibrator having a permanent magnet and supported by a first spring body on a fixing member, and a second vibrator having a coil so disposed as to intersect the magnetic flux of the permanent magnet and supported by a second spring body on the fixing member. One of the first vibration system and the second vibration system serves as a sound source for producing sound waves of audio-frequency for propagation to the outside, and the other vibration system serves as a vibration source for transmitting vibration to the fixing member and vibrating a device.

Abstract: A mounting member 72 is formed which is pushed by a base plate 3 on the side from which a rotation shaft of the motor main body projects, that is to say, on the side on which the counter weight is mounted. A mounting member 81 is provided which is pushed by the base plate on the bracket 80 mounted on the other face opposite to that from which the rotation shaft of the motor main body projects. A supply terminal 90 having a spring characteristic and which is mounted on the bracket and a terminal 31 which supplies electricity are pressed together. A peaked section 71 is formed in the flexible holder mounted on the outer periphery of the motor main body so that the supply terminal is tightly held against the supply terminal.

Abstract: An eccentric rotor includes an eccentric printed wiring commutator device having first and second surfaces, an expanded fan when viewed in a plane, a central hole for shaft installation, a plurality of segment patterns exposed toward a periphery of the first surface, at least one printed circuit armature coil at least one of the first and second surfaces, and an eccentric wound armature coil installation guide, wherein an end connection of each coil is arranged at an outer circumference during rotation; a wound, non-molded air-core coil incorporated in an air-core position determination guide and having an end portion connected to the end connection; a resin bearing holder inserted in the shaft installation hole with a first part protruding toward the segment pattern and a second part extending toward the second surface of the printed wiring commutator device; and a resin eccentric weight having a density-exceeding 3 at a fan-like arc-shaped portion of the printed wiring commutator device.

Abstract: A compact motor capable of being reflow-soldered, which can solve a problem of thermal demagnetization of a magnet with a simple structure, has magnets in a housing. At least a part of a surface to which the magnet is attached is separated by an acrylic adhesive sheet and heat resistant resin from metal members, such as a bracket and shaft forming part of the housing. The shaft is stainless steel having a low heat conductivity or an additional cover is used for the shaft to withstand reflow-soldering.

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: 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: There is provided a vibrator 10 which is integrally coupled to a rotating shaft 12 of a motor. A groove portion 13 in which the rotating shaft 12 is fitted is formed in an eccentric load portion 11, and side walls 14 bulging from the eccentric load portion 11 and forming both side edge portions of the groove portion 13 are formed. A portion 14c of a tip portion end surface 14a of the side wall 14 except an outer peripheral portion 14b of the side wall 14 and at a side of the groove portion is caulked from an opening side of the groove portion to a bottom side, so that the vibrator 10 is integrally coupled to the rotating shaft.

Abstract: The invention relates to a vibrator for use in devices for vibration therapy, especially for humans. The device has an electric motor and an unbalanced mass, or fly weight, which is driven peripherally by it.

Abstract: The present invention provides a disc type eccentric rotor having at least two air-core coils, the rotor comprising a flat type commutator member having a shaft insertion through hole in the center thereof, a plurality of commutator land segments formed around the shaft insertion through hole on a first side of the flat type commutator member, wound type air-core coil arrangement guides formed around the shaft insertion through hole on a second side of the flat type commutator member, air-core coil end portion connection lands formed circumferentially on the second side of the flat type commutator member, a shaft holder installed around the shaft insertion through hole on the second side of the flat type commutator member, and wound type air-core coils installed at the wound type air-core coil arrangement guides and having the end portions thereof connected to the air-core coil end portion connection lands.

Abstract: In a rotor having a printed wiring commutator member as a printed wiring board in which a shaft installation hole is installed at the center of a printed wiring board, at least six segment patterns separated by slits are formed around the shaft installation hole, and simultaneously, at least three conductive bodies connect every two other segment patterns, terminal connection patterns are arranged at the outer circumference of the printed wiring board, a printed wiring commutator member is formed, not by through hole plating, as a means for forming the at least three conductive bodies for connecting every two other segment patterns, a plurality of air-core armature coils are installed at the side opposite to the segment patterns, and terminals of the air-core armature coils are connected to the terminal connection patterns through notches arranged at the outer circumference.

Abstract: A motor includes a stator and a rotor facing the stator. The rotor has a magnet and an eccentric weight. The magnet is magnetized in a rotational direction and produces driving magnetic field. The eccentric weight is made of the material having a greater specific gravity than the magnet. The magnet shapes in a cylinder and a part of the cylinder is cut away to form a space. The eccentric weight is placed in the space. A rotational area of the magnet and that of the eccentric weight overlap each other. In this structure, rotation of the rotor spins the eccentric weight, thereby producing large vibrations. The eccentric weight is accommodated by a motor housing for the safety. The thin and compact motor is thus obtainable.