Abstract: A horizontal linear vibrator includes: a cover unit; a bracket providing an internal space between the cover unit and the bracket; a vibration unit including a mass body having an insertion part providing an accommodating space at one surface thereof, mounted in the internal space, and making a horizontal, linear movement; a magnetic field unit providing an electromagnetic force to allow the vibration unit to move horizontally; and one or more sub-mass units inserted in the insertion part in order to adjust a resonance frequency of the vibration unit.

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

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

Abstract: The present invention provides a horizontal linear vibrator which can reduce the thickness but increase the strength of vibrations while at the same time guaranteeing a sufficiently long lifetime and satisfactory responsivity. The horizontal linear vibrator includes a casing, a bracket, a vibration unit and springs. The casing defines an internal space therein. A first magnet is attached to an upper plate of the casing. The bracket is coupled to the lower end of the casing. The second magnet is attached to the bracket such that different poles of the first and second magnets face each other. The vibration unit has a weight, and a cylindrical coil which is provided in or under the weight. The springs are coupled to the sidewall plates of the casing or the bracket. The springs elastically support the vibration unit to allow the vibration unit to vibrate in the horizontal direction.

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

Abstract: The present invention provides a horizontal linear vibrator which can reduce the thickness but increase the strength of vibrations while at the same time guaranteeing a sufficiently long lifetime and satisfactory responsivity. The horizontal linear vibrator includes a casing, a bracket, a vibration unit, a cylindrical coil and springs. The bracket is coupled to the casing to form an internal space. The vibration unit includes a weight, a pair of yokes and magnets. The weight has an opening therein. The yokes are disposed on the inner surfaces of the weight. The magnets are provided in the yokes such that different poles of the magnets face each other. The cylindrical coil is perpendicularly mounted to the bracket and disposed in space between the pair of yoke. The springs are coupled to both ends of the casing or the bracket. The springs elastically support the vibration unit to allow the vibration unit to vibrate in the horizontal direction.

Abstract: A linear type vibration motor having a magnet casing is disclosed. The linear type vibration motor in accordance with an embodiment of the present invention includes a magnet assembly having a pair of magnets, in which same magnetic poles thereof face each other, a magnet casing, which has a hollow part formed therein and houses the magnet assembly in the hollow part, a base, which has a bobbin formed thereon and in which the magnet casing is inserted into the bobbin, a coil, which is coupled to the bobbin, a weight, which is coupled to both ends of the magnet casing, and a pair of elastic bodies, which are interposed between either end of the base and either end of the weight, respectively. Thus, the operating lifetime of the linear type vibration motor can be extended, and this arrangement can prevent the linear type vibration motor from being damaged by an external shock.

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

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

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

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

Abstract: A vibration-sound generating device and yoke thereof are described. The vibration-sound generating device comprises a diaphragm, a vibration part comprising a magnet and a yoke, which is positioned apart from the diaphragm by a desired distance, a suspension elastically supporting the vibration part, a supporting part supporting the diaphragm and the suspension, and a voice coil electromagnetically driving the diaphragm and the vibration part. The yoke of the invention has higher specific gravity and magnetic permeability than iron. So that it can improve performance of vibration and sound device.

Abstract: A vibration actuator excites a mass member by interaction between an electric field of a vibration coil provided in an inner space of a case and a magnetic field of a magnetic field unit disposed corresponding to the vibration coil. The vibration actuator has an elastic wire having a wire body fixed to the outer surface of the mass member and elastic ends fixed to the inner surface of the case. The elastic wire is connected between the case and the mass member for elastically supporting mass member.

Abstract: The invention relates to an optical disk drive, and more particularly, to a holder for disk drives having an improved chuck structure for seating a disk. The holder of the invention, in use, is inserted into a central opening of a disk for detachably seating the disk, and comprises: a circular hub projected upward and sized equal to the central opening of the disk; a chuck projected from a lateral portion of the hub, wherein the chuck includes a rear portion elastically connected with the hub, a peak formed in a front portion of the chuck and a lower circular face of a curvature extended downward from the peak; and a support formed integral with the hub for contacting the lower circular face of the chuck to enable circular motion of the chuck.

Abstract: In an optical storage, a base is defined in a bottom of a space which receives a disk. A drive unit is mounted on the base for turning the disk around a drive axis. A shroud is defined in a side of the space, and a cover is defined in a top of the space. The cover has a slanted line extended from a central portion of the cover toward the shroud at an upward inclination with respect to a disk plane when seen in a cross-section taken along a line perpendicular to the disk plane.

Abstract: A linear actuator is disclosed. A linear actuator that includes a first magnet and a second magnet secured with a predetermined gap in-between each other, a vibration magnet part interposed between the first magnet and the second magnet which is magnetized to repulse both the first magnet and the second magnet, and an electromagnet part interposed adjacent to the vibration magnet part that changes a magnetic field formed around the vibration magnet part, may provide high efficiency, by forming a magnetic spring from the repulsive forces of magnets and using the resonance of the magnetic spring.

Abstract: The disk-chucking device includes a chuck base having a plurality of arranging parts recessed along an outer periphery of the chuck base and formed at the center of the chuck base with a central boss connected to the motor, a plurality of chuck pins respectively assembled to the arranging parts, a plurality of spring members elastically supporting a rear end of the chuck pins forwardly such that a leading end of the chuck pins can be exposed to an outer surface of the chuck base, and a rigid frame contacting the spring members and formed with a central hole such that the central hole has an inner diameter larger than an outer diameter of the central boss, thereby providing a degree of freedom, which allows the rigid frame to be moved in a horizontal direction within an allowable range.

Abstract: The disk-chucking apparatus comprises a chuck base having a fitting hole formed through the center thereof for allowing a driving shaft of the motor, and a plurality of first and second disposition parts formed at the outer surface. A plurality of chuck pins are disposed in the first disposition parts of the chuck base such that the chuck pins can be moved inward and outward, respectively. The chuck pins are resiliently supported outward by means of spring members each having one end connected to the chuck base. A plurality of resilient pieces are provided at the second disposition parts, respectively. Each of the resilient pieces comprises a curved part, formed between a horizontal resilient part and a vertical resilient part, having first and second inner curved sections such that outer surfaces of the resilient pieces resiliently contact the inner circumference of the center hole of the disk.

Abstract: A vibration-sound generating device and yoke thereof are described. The vibration-sound generating device comprises a diaphragm, a vibration part comprising a magnet and a yoke, which is positioned apart from the diaphragm by a desired distance, a suspension elastically supporting the vibration part, a supporting part supporting the diaphragm and the suspension, and a voice coil electromagnetically driving the diaphragm and the vibration part. The yoke of the invention has higher specific gravity and magnetic permeability than iron. So that it can improve performance of vibration and sound device.

Abstract: The invention relates to an optical disk drive, and more particularly, to a holder for disk drives having an improved chuck structure for seating a disk. The holder of the invention, in use, is inserted into a central opening of a disk for detachably seating the disk, and comprises: a circular hub projected upward and sized equal to the central opening of the disk; a chuck projected from a lateral portion of the hub, wherein the chuck includes a rear portion elastically connected with the hub, a peak formed in a front portion of the chuck and a lower circular face of a curvature extended downward from the peak; and a support formed integral with the hub for contacting the lower circular face of the chuck to enable circular motion of the chuck.