A tone arm according to an embodiment includes: a first arm configured to rotate around a rotation shaft in a horizontal direction of a record; a second arm configured to rotate around a free fulcrum of the first arm as the first arm rotates; a motor configured to rotatably drive the first arm; and a controller configured to control a phase angle of the motor so that the second arm is disposed with a longitudinal axis thereof extends in a tangent direction of a groove of the record at a contact position of a stylus attached to a tip portion of the second arm and the groove of the record.

A lifter mechanism includes: a first lifter; a second lifter; a first biasing member that biases the second lifter from a second lower limit position toward a second upper limit position; a locking lever that is displaced between a locked position in which the locking lever locks the second lifter in the second lower limit position and a released position in which the locking lever releases the lock of the second lifter from the second lower limit position; a second biasing member that biases the locking lever from the locked position toward the released position; a holding member that holds the locking lever in the locked position; and a queueing lever that pushes down the second lifter from the second upper limit position to the second lower limit position.

A lifter mechanism includes: a first lifter; a second lifter; a first biasing member that biases the second lifter from a second lower limit position toward a second upper limit position; a locking lever that is displaced between a locked position in which the locking lever locks the second lifter in the second lower limit position and a released position in which the locking lever releases the lock of the second lifter from the second lower limit position; a second biasing member that biases the locking lever from the locked position toward the released position; a holding member that holds the locking lever in the locked position; and a queueing lever that pushes down the second lifter from the second upper limit position to the second lower limit position.

A tonearm including an elongate member, a suspension means, a protrusion and a contact surface. The suspension means suspends the elongate member (8a; 8b; 8c; 8d; 8e) in an approximately horizontal position. The weight of the elongate member is substantially supported by the suspension means. The protrusion is arranged in opposing contact with the contact surface at a contact point, such that action of a drag force substantially parallel to the length of the elongate member urges the contact surface and the protrusion into opposing contact, thereby producing a contact force which resists the drag force. By separating the means for supporting the weight of the elongate member and the means for resisting a drag force acting along the length of the elongate member, the drag force can be more effectively resisted thus providing a tonearm with improved properties.

A platter supported and driven turntable has a spindle, an upper circular platter, a lower circular platter, an arm board, and a tonearm assembly. The spindle is to rotate about a first direction. The spindle has a hub, a shaft and a bearing assembly between the hub and the shaft. The shaft has a flange. The upper circular platter is attached to the shaft of the spindle. The lower circular platter is attached to the flange of the shaft of the spindle. The arm board is attached to the hub of the spindle. The arm board has a first extension section, a mid-range section, and a second extension section. The mid-range section of the arm board is disposed between the upper circular platter and the lower circular platter. The tonearm assembly is directly attached to the first extension section of the arm board. The second extension section of the arm board is attached to a ballast or a supporting turntable through one or more adjustable height mounts.

A vibration damper for a disk drive suspension includes a viscoelastic damping layer, a substantially stiffer polymer constraining layer, and a metal layer interposed between the viscoelastic layer and the polymer constraining layer, such as a thin layer of aluminum vapor deposited onto the polymer constraining layer. The metal layer hides irregularities in the viscoelastic layer as that viscoelastic layer is adhered to the suspension without introducing potentially contaminating mineral particles into the polymer constraining layer.

According to one embodiment, a disk device includes a housing with a bottom wall, magnetic disks supported on a hub of a motor, a printed circuit board provided on an outer surface of the bottom wall, and a wiring board attached on the outer surface of the bottom wall. The bottom wall includes a recess formed in the outer surface, a step located on border between the outer surface and the recess, and through holes opened to the recess. The wiring board includes one end portion disposed in the recess and connection pads on the one end portion, connected to lead wires of a coil. An adhesive is filled into the recess and the through holes, and covers the one end and a solder joint and seals the through holes.

A static electricity elimination floating tonearm includes a tonearm base, a tonearm, a deflector and an ion air-pressure device. An air-floating arm tube extends horizontally from a side of the tonearm base, a top edge of the air-floating arm tube is provided with air holes arranged at intervals, the tonearm includes a floating piece and an arm rod, and the ion air-pressure device is provided for generating an airflow with positive and negative ions which is sent into the changer of the air-floating arm tube and blown out from the air holes of the air-floating arm tube, the floating piece together with the arm rod are blown upward to define an air-floating state, and deflected by the floating piece and the deflector and blown towards the turntable, not only providing a frictionless air-floating displacement state of the tonearm, but also eliminating static electricity and dust on the turntable.

A static electricity elimination floating tonearm includes a tonearm base, a tonearm, a deflector and an ion air-pressure device. An air-floating arm tube extends horizontally from a side of the tonearm base, a top edge of the air-floating arm tube is provided with air holes arranged at intervals, the tonearm includes a floating piece and an arm rod, and the ion air-pressure device is provided for generating an airflow with positive and negative ions which is sent into the changer of the air-floating arm tube and blown out from the air holes of the air-floating arm tube, the floating piece together with the arm rod are blown upward to define an air-floating state, and deflected by the floating piece and the deflector and blown towards the turntable, not only providing a frictionless air-floating displacement state of the tonearm, but also eliminating static electricity and dust on the turntable.

A tonearm including an elongate member, a suspension means, a protrusion and a contact surface. The suspension means suspends the elongate member (8a; 8b; 8c; 8d; 8e) in an approximately horizontal position. The weight of the elongate member is substantially supported by the suspension means. The protrusion is arranged in opposing contact with the contact surface at a contact point, such that action of a drag force substantially parallel to the length of the elongate member urges the contact surface and the protrusion into opposing contact, thereby producing a contact force which resists the drag force. By separating the means for supporting the weight of the elongate member and the means for resisting a drag force acting along the length of the elongate member, the drag force can be more effectively resisted thus providing a tonearm with improved properties.