摘要:
A ferrofluid seal for a hard disk drive actuator bearing has two circular plates which are axially spaced apart about a nonmagnetic pivot shaft of the actuator. The plates are parallel and in close proximity to one another. The upper plate is made of magnetically-conductive steel and is mounted to a stationary sleeve which surrounds the shaft. The lower plate is mounted to the shaft and has an annular magnet with pole pieces on an upper surface. A magnetic ferrofluid is located between the magnet and the upper plate to complete the magnetic circuit and form a seal. The ferrofluid seal prevents bearing emissions such as grease oil vapor and aerosol droplets from contaminating the disk drive.
摘要:
A head base has at least one head chip fixed thereto. A position of the head chip is adjusted to a predetermined position by applying a laser beam to the head base to cause plastic deformation of the head base. Appropriate laser radiation conditions are set depending upon a necessary amount of positional adjustment of the head chip fixed to the head base.
摘要:
A suspension assembly for supporting a read/write head/slider assembly adjacent to a rotating storage disk with dynamically adjustable flying height for use within a hard disk drive is provided. The suspension assembly includes a generally elongated loadbeam that has a baseplate defined at a first end thereof and a gimbaled flexure portion defined at a second end thereof. The flexure portion includes a pair of flexure legs and a flexure tongue. The pair of flexure legs extend from the flexure tongue and each leg attaches to an opposite side of the loadbeam. The flexure tongue generally provides a mounting surface for the read/write head/slider assembly. Strips of thermal-expansion material are attached to the flexure portion. These strips are connected to a power source via a power conductor. When the strips are energized, they expand and deform a portion of the flexure portion. This deformation of the flexure portion is transposed to the read/write head/slider assembly for dynamically adjusting the flying height thereof.
摘要:
A pivot assembly for sustaining a magnetic head, a head suspension and an actuator block pivotally parallel to magnetic disks oscillates slowly. Hence the invention has been made in light of examining a sealing structure for retaining sufficient capability of preventing a leakage of lubricant and retaining sufficient capability of preventing a contamination of lubricant, characterized in that retaining required sealing capabilities, an annular shield plate is secured to the shaft, achieving pivot assembly manufacturing cost by reducing machining process and a number of sealing members.
摘要:
An assembly including at least one chip with an embedded magnetic head. A base and/or a cover includes at least partially a housing in which the at least one chip is embedded. Such an assembly may find particular application to a magnetic recording system.
摘要:
In an apparatus (1) having a drive shaft (18) and having a disc-shaped support (17) which is rotationally locked to the drive shaft (18) the support (17) has two tubular projections (22, 23) each having a connecting zone (24, 25) in its interior, which connecting zone has a given height (H1, H2) and a given inner diameter (D1, D2), each of the two projections (22, 23) being connected to the drive shaft (18) by a press-fit in the area of its connecting zone (24, 25), and the two inner diameters (D1, D2) of the two connecting zones (24, 25) having different values.
摘要:
A rotary head drum device includes a rotary drum and a plurality of rotary heads mounted on the rotary drum. The rotary heads record and reproduce a signal on and from a magnetic tape. The rotary heads are as follows. First and second rotary heads for an information signal in a low-frequency range are opposed to each other diametrically with respect to the rotary drum, and are different from each other in azimuth angle. A third rotary head is designed for digital signals in frequency ranges higher than the frequency range of the information signal, and for first and second operation modes being different from each other in data transmission rate. A fourth rotary head for a digital signal in the second operation mode is opposed to the third rotary head diametrically with respect to the rotary drum, and is equal in azimuth angle to the third rotary head. A fifth rotary head for a digital signal in the first operation mode is substantially opposed to the third rotary head diametrically with respect to the rotary drum, and is different from the third rotary head in azimuth angle. The fourth and fifth rotary heads are in a double azimuth head structure. Sixth and seventh rotary heads for a digital signal in the second operation mode are opposed to each other diametrically with respect to the rotary drum, and are equal to each other in azimuth angle.