Abstract: A motor and a disk driver having the motor are disclosed. The motor in accordance with an embodiment of the present invention includes: a shaft; a boss, which is coupled to one end of the shaft; a bearing, which supports the other end of the shaft such that the shaft can rotate; a holder, which supports the bearing; a stator, which is coupled to the holder; a rotor, which is coupled to the boss and covers the stator; and a ventilation hole, which is formed on a lower surface of the boss such that air flows toward the stator. The motor in accordance with an embodiment of the present invention can make the flow of air around a disk stable by forming an air circulation structure, allowing air to flow from the inside to the outside of the motor.

Abstract: An auto-balancing device, as well as a turntable device and a disc driving device equipped with the auto-balancing device are disclosed. The auto-balancing device, which includes a housing, which is coupled with a rotating body, and in which an annular insertion groove is formed; a correcting ring, rotatably inserted in the insertion groove; and multiple correcting balls, positioned between the correcting ring and an outward inwall of the insertion groove, can reduce noise and vibration for a rotating body during acceleration and deceleration and during high-speed rotations.

Abstract: The jig includes an upper jig part, a lower jig part, a support plate, a guide jig part, and a spring. The upper jig part has a pressure protrusion for press-fitting a rotating shaft, and applies pressing force to the rotating shaft. The lower jig part supports a rotor casing in a direction which is opposite the acting direction of the pressing force. The support plate is mounted to the lower jig part, and supports the rotor casing in a direction which is opposite that of the force for press-fitting the rotating shaft. The guide jig part supports the rotor casing in a direction which is opposite that of reaction force generated in the rotor casing by the support plate. The spring elastically biases the guide jig part towards the rotor casing.

Abstract: There are provided a motor and a disk driving device equipped with the motor. The motor may include a core on which a coil is wound, a rotor having a magnet generating an electromagnetic force through an interaction with the coil, and rotating a shaft, a sleeve housing including an inner diameter part to which a sleeve supporting the shaft is press-fitted, a core seating part extended outside in an outer diameter direction from the inner diameter part, and an outer diameter part extended to an axial lower side of the sleeve from the core seating part, and a base plate including a strength reinforcement part formed therein, the strength reinforcement part being brought into contact with the outer diameter part and at least one part of an inner surface of the core seating part.

Abstract: There is provided a disk chucking apparatus according to an exemplary embodiment of the present invention, including: a centering case fixed on the inner peripheral surface of a disk; and a claw formed in the centering case and including a contact unit which rotates in a horizontal direction at the time of mounting the disk and is introduced into the centering case to elastically support the inner peripheral surface of the disk.

Abstract: A disk chucking apparatus and a disk drive having the same are disclosed. The disk chucking apparatus may include: a chuck base having a plurality of holding portions, a plurality of chuck pins which are inserted in the holding portions such that the chuck pins protrude out from the chuck base, and a plurality of elastic members which elastically support the chuck pins, where each of the elastic members elastically supports a pair of adjacent chuck pins concurrently. When this disk chucking apparatus is utilized, the center of the disk and the center of the chuck base can be aligned with greater ease, since forces can be transferred uniformly to the center of disk.

Abstract: This disk chucking apparatus may include: a chuck bass having a plurality of holding portions, a plurality of chuck pins which are inserted in the holding portions to be elastically supported, and protrudes out from the chuck base, an elastic fragment which is arranged to be symmetrical to the chuck pin with respect to the rotation center of the chuck base, and elastically supports a disk together with the chuck pin, and wherein the elastic fragment has an inclined surface inclined with respect to a direction of equipment of the disk, and the inclined surface are increased from smaller radius than the inner radius of the disk to larger radius than the inner radius of the disk. This disk chucking apparatus make it possible to align the centers of the chuck base and disk, and to decrease the force in mounting a disk.

Abstract: A disk chucking device and a disk driving device having the same are disclosed. The disk chucking device may include: a chuck base, on which a boss is formed; chuck chips inserted in the chuck base in a manner such that the chuck chips protrude out from the chuck base; an elastic member, which elastically supports a pair of adjacent chuck chips towards an outer side of the chuck base; and a protrusion portion, which is formed on a bottom of the boss, and which supports the elastic member. The disk chucking device can improve the environment of the elastic members that support the chuck chips, to improve the alignment between the rotation centers of the disk and the chuck base.

Abstract: A motor is disclosed. The motor in accordance with an embodiment of the present invention includes a base, a shaft, which has an end part coupled to the base, a housing, which has a hollow part formed therein in such a way that the shaft rotatably supports the housing and in which the other end part of the base is inserted into the hollow part, and a rotor case, which includes an insertion hole and a supporting wall. The insertion hole has the housing inserted therein, and the supporting wall supports an outer circumferential surface of the inserted housing.

Abstract: A motor is disclosed. In accordance with an embodiment of the present invention, the motor includes a base, a shaft, which has an end part thereof coupled to the base, a stopper, which is coupled to the shaft and has a latch protruded in a direction of diameter of the shaft, a housing, which includes a hollow part, a ledge and an entrance and exit groove, and a rotor case, which is coupled with the housing.

Abstract: A motor is disclosed. In accordance with an embodiment of the present invention, the motor includes a stator and a rotor, which is supported by the stator such that the rotor rotates. Here, the rotor includes a rotational axis, which is supported by the stator such that the rotational axis rotates, a rotating body, which rotates together with the rotational axis, and a hub, which has a ring-shaped body and a protruding part. Here, the ring-shaped body is interposed between the rotational axis and the rotating body, and the protruding part extends an outer circumferential surface of the ring-shaped body coupled to the rotating body. Thus, the motor can improve the coupling strength between the rotational axis and the rotating body, securing the rotating rotor's stability.

Abstract: A motor is disclosed. The motor in accordance with an embodiment of the present invention can include: a shaft; a bearing supporting the shaft to rotate; a thrust plate supporting a lower end of the shaft a boss joined to the shaft and having a ring-shaped groove on a side facing the bearing; and a rotor joined to the boss.

Abstract: A motor is disclosed. In accordance with an embodiment of the present invention, the motor includes a rotational axis, a rotating body, which rotates together with the rotational axis as one unit, a hub having a ring-shaped body and a protruding part, in which the ring-shaped body is interposed between the rotational axis and the rotating body and the protruding part is protruded from the ring-shaped body towards the rotational axis and is in contact with the rotating body so as to extend an outer circumferential surface of the ring-shaped body coupled to the rotating body, and a housing, which supports and rotates the rotational axis, in which the housing having a supporting part is interposed between the rotational axis and the protruding part of the hub and supports the rotational axis. Thus, the rotor can be safely supported, providing the rotational stability of the rotor.

Abstract: A motor including a rotor and a stator that supports and rotates the rotor is disclosed. In accordance with an embodiment of the present invention, the motor includes a magnetic member, which is installed in the rotor such that the magnetic member faces the stator, and a stator magnetic body, which is a part of the stator and has a part corresponding to the magnetic member formed asymmetrically therein. In this way, the motor can prevent a whirling effect by installing the magnetic member, which forms a preload, even the motor is thinner.

Abstract: A motor is disclosed. In accordance with an embodiment of the present invention, the motor includes a stator and a rotor, which is supported by the stator such that the rotor rotates. Here, the rotor includes a rotational axis, which is supported by the stator such that the rotational axis rotates, a rotating body, which rotates together with the rotational axis, and a hub, which has a ring-shaped body and a protruding part. Here, the ring-shaped body is interposed between the rotational axis and the rotating body, and the protruding part extends an outer circumferential surface of the ring-shaped body coupled to the rotating body. Thus, the motor can improve the coupling strength between the rotational axis and the rotating body, securing the rotating rotor's stability.

Abstract: A motor is disclosed. The motor can include: a rotor equipped with a shaft; a base, in which a housing hole is formed and which includes a housing support portion protruding along a periphery of the housing hole; a housing, which may be inserted in the housing hole to be supported by the housing support portion and in which a through-hole is formed so that the shaft may be inserted in one side of the through-hole; and a rotor support, which may be inserted into the other side of the through-hole and in which a support indentation is formed to rotatably support the shaft. This motor can be manufactured by a simple process at a low manufacturing cost.

Abstract: A motor is disclosed. The motor in accordance with an embodiment of the present invention can include: a shaft; a bearing supporting the shaft to rotate; a thrust plate supporting a lower end of the shaft a boss joined to the shaft and having a ring-shaped groove on a side facing the bearing; and a rotor joined to the boss.

Abstract: A motor is disclosed. The motor in accordance with an embodiment of the present invention can include: a shaft; a bearing supporting the shaft to rotate; a thrust plate supporting a lower end of the shaft a boss joined to the shaft and having a ring-shaped groove on a side facing the bearing; and a rotor joined to the boss.

Abstract: A disk drive is disclosed. The disk drive can include includes a spindle motor, which can rotate a disk; an encoder, which can detect the rotational speed of the disk; an encoder holder, which secures the encoder; and a base plate, which supports the spindle motor, and in which a holder indentation is formed for inserting the encoder holder in. Certain embodiments of the invention allow easy height adjustments for the encoder holder, so that the encoder may maintain a particular distance from the disk, and also allow the encoder to be fitted onto the base plate, even in cases where the base plate has a limited mounting area.

Abstract: A spindle motor can include a rotor support piece, which may rotatably support a rotor that is inserted onto one end, and which may include a projecting part that protrudes from the other end and a mounting part that has a flat surface formed along the periphery of the projecting part; a base plate, in which an insertion hole may be formed for inserting the projecting part through, and on which multiple support protrusions may be formed along the periphery of the insertion hole for supporting the mounting part along a periphery of the insertion hole; and a buffer member, which may include a projecting-part hole for inserting the projecting part through and support-protrusion holes for inserting the support protrusions through, and which may be positioned between the rotor support piece and the base plate to absorb vibration. This arrangement can reduce the occurrence and transfer of vibrations.