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US 7,733,608 B2Granted
Head holding member, disk device with the head holding member, and head holding method in the disk, device
AssigneePanasonic Corporation
InventorsYoshihiro Ueno, Makoto Umeda
Life of this patent
Estimating the term…
Abstract
The present invention provides a head holding member and a head holding method of a head actuator having a very high impact resisting property, and having a simple construction, and a disk device using the head holding member and the head holding method. The head holding member resists an impact applied at a stopping time, and a stable operation can be performed at a power turning-on time.
Claims31
A head holding member for guiding a tab portion formed at one end of a head support arm constituting an actuator to an escaping position, and holding the tab portion in the escaping position when an unloading operation of the actuator is performed by an operation stopping command of a disk device;
- wherein the escaping position is formed in the head holding member and comprises:
- a head holding plane portion for holding the tab portion;
- a load side projecting portion formed on a loading side of the head holding plane portion;
- and
- an unload side wall face formed on a unloading side of the head holding plane portion,
- wherein a load side wall face having an angle smaller than 90° with respect to the head holding plane portion is formed on the loading side of the head holding plane portion, and
- wherein the load side wall face forms a face opposed to the head holding plane portion of the load side projecting portion.
4 more elements
A head holding member for guiding a tab portion formed at one end of a head support arm to an escaping position constituting an actuator, and holding the tab portion in the escaping position when an unloading operation of the actuator is performed by an operation stopping command of a disk device;
- wherein the escaping position is formed in the head holding member and comprises:
- a head holding plane portion for holding the tab portion;
- a load side projecting portion formed on a loading side of the head holding plane portion;
- and
- an unload side wall face formed on a unloading side of the head holding plane portion,
- wherein a load side wall face having an angle perpendicular to the head holding plane portion is formed on the loading side of the head holding plane portion, and
- wherein a head upper wall face extends directly from the load side wall face and forms a face opposed to the head holding plane portion.
4 more elements
A head holding member for guiding a tab portion formed at one end of a head support arm to an escaping position constituting an actuator, and holding the tab portion in the escaping position when an unloading operation of the actuator is performed by an operation stopping command of a disk device;
- wherein the escaping position is formed in the head holding member and comprises:
- a head holding plane portion for holding the tab portion;
- a load side projecting portion formed on a loading side of the head holding plane portion;
- and
- an unload side wall face formed on a unloading side of the head holding plane portion,
- wherein a slanting face having an angle greater than 90° with respect to the head holding plane is formed between the head holding plane portion and the unload side wall face, and
- wherein a head moving plane portion parallel to the head holding plane portion is formed between the head holding plane portion and the unload side wall face.
4 more elements
A head holding method in a disk device, the disk device including:
- a recording medium rotatably arranged around a primary rotating axis;
- a head support arm having a head and a tab portion at one end thereof, the head support arm being capable of rotating around a first rotating axis parallel to the primary rotating axis;
- a first bearing portion arranged in a position separated from the primary rotating axis, the first bearing portion allowing rotation of the head support arm;
- a second bearing portion arranged between the head and the first bearing portion, the second bearing portion being capable of rotating around a second rotating axis perpendicular to a center line of the longitudinal direction of the head support arm;
- two or more abutting portions located on the second rotating axis and abutting on the head support arm or the second bearing portion;
- a leaf spring portion for connecting the head support arm and the second bearing portion;
- a ramp portion for holding the tab portion at an escaping time of the head support arm;
- a head holding plane portion formed in the ramp portion for holding the tab portion in an escaping position;
- an unload side wall face formed in the ramp portion, the unload side wall face being formed on an unloading side of the head holding plane portion;
- and
- a load side projecting portion formed in the ramp portion, the load side projecting portion being formed on a loading side of the head holding plane portion for preventing movement of the tab portion from the escaping position to the direction of the recording medium,
- the head holding method comprising moving the tab portion to the escaping position to perform an unloading operation of the head support arm upon an operation stopping command of the disk device by:
- applying forces in a radial direction of the recording medium and a direction perpendicular to the radial direction and a biasing force of the leaf spring portion to the head support arm;
- moving the head support arm in the radial direction of the recording medium;
- and
- abutting the tab portion on the unload side wall face of the ramp portion and then holding the tab portion in the head holding plane portion as the escaping position of the tab portion by at least the biasing force of the leaf spring portion.
13 more elements
A disk device comprising:
- a recording medium rotatably arranged around a primary rotating axis;
- a head support arm having a head and a tab portion at one end thereof, the head support arm being capable of rotating around a first rotating axis parallel to the primary rotating axis;
- a first bearing portion arranged in a position separated from the primary rotating axis, the first bearing portion allowing rotation of the head support arm;
- a second bearing portion arranged between the head and the first bearing portion, the second bearing portion being capable of rotating around a second rotating axis perpendicular to a center line of the longitudinal direction of the head support arm;
- two or more abutting portions located on the second rotating axis and abutting on the head support arm or the second bearing portion;
- a leaf spring portion for connecting the head support arm and the second bearing portion;
- a ramp portion for holding the tab portion at an escaping time of the head support arm;
- a head holding plane portion formed in the ramp portion for holding the tab portion in an escaping position;
- an unload side wall face formed in the ramp portion, the unload side wall face being formed on an unloading side of the head holding plane portion;
- and
- a load side projecting portion formed in the ramp portion, the load side projecting portion being formed on a loading side of the head holding plane portion for preventing movement of the tab portion from the escaping position to the direction of the recording medium,
- wherein the tab portion is movable to the escaping position to perform an unloading operation of the head support arm upon an operation stopping command of the disk device by:
- (i) applying forces in a radial direction of the recording medium and a direction perpendicular to the radial direction and a biasing force of the leaf spring portion to the head support arm;
- (ii) moving the head support arm in the radial direction of the recording medium;
- and
- (iii) abutting the tab portion on the unload side wall face of the ramp portion and is then held in the head holding plane portion as the escaping position of the tab portion by at least the biasing force of the leaf spring portion, and
- wherein a slanting face having an angle greater than 90° with respect to the head holding plane portion, and a head moving plane parallel to the head holding plane portion are formed between the head holding plane portion and the unload side wall face.
14 more elements
A disk device comprising:
- a recording medium rotatable arranged around a primary rotating axis;
- a head support arm having a head and a tab portion at one end thereof, the head support arm being capable of rotating around a first rotating axis parallel to the primary rotating axis;
- a first bearing portion arranged in a position separated from the primary rotating axis, the first bearing portion allowing rotation of the head support arm;
- a second bearing portion arranged between the head and the first bearing portion, the second bearing portion being capable of rotating around a second rotating axis perpendicular to a center line of the longitudinal direction of the head support arm;
- two or more abutting portions located on the second rotating axis and abutting on the head support arm or the second bearing portion;
- a leaf spring portion for connecting the head support arm and the second bearing portion;
- a ramp portion for holding the tab portion at an escaping time of the head support arm;
- a head holding plane portion formed in the ramp portion for holding the tab portion in an escaping position;
- an unload side wall face formed in the ramp portion, the unload side wall face being formed on an unloading side of the head holding plane portion;
- and
- a load side projecting portion formed in the ramp portion, the load side projecting portion being formed on a loading side of the head holding plane portion for preventing movement of the tab portion from the escaping position to the direction of the recording medium,
- wherein the tab portion is movable to the escaping position to perform an unloading operation of the head support arm upon an operation stopping command of the disk device by:
- (i) applying forces in a radial direction of the recording medium and a direction perpendicular to the radial direction and a biasing force of the leaf spring portion to the head support arm;
- (ii) moving the head support arm in the radial direction of the recording medium;
- and
- (iii) abutting the tab portion on the unload side wall face of the ramp portion and is then held in the head holding plane portion as the escaping position of the tab portion by at least the biasing force of the leaf spring portion,
- wherein a load side wall face having an angle perpendicular to the head holding plane portion is formed on the loading side of the head holding plane portion, and
- wherein a head upper wall face extends directly from the load side wall face and forms a face opposed to the head holding plane portion.
15 more elements
A disk device comprising:
- a recording medium rotatably arranged around a primary rotating axis;
- a head support arm having a head and a tab portion at one end thereof, the head support arm being capable of rotating around a first rotating axis parallel to the primary rotating axis;
- a first bearing portion arranged in a position separated from the primary rotating axis, the first bearing portion allowing rotation of the head support arm;
- a second bearing portion arranged between the head and the first bearing portion, the second bearing portion being capable of rotating around a second rotating axis perpendicular to a center line of the longitudinal direction of the head support arm;
- two or more abutting portions located on the second rotating axis and abutting on the head support arm or the second bearing portion;
- a leaf spring portion for connecting the head support arm and the second bearing portion;
- a ramp portion for holding the tab portion at an escaping time of the head support arm;
- a head holding plane portion formed in the ramp portion for holding the tab portion in an escaping position;
- an unload side wall face formed in the ramp portion, the unload side wall face being formed on an unloading side of the head holding plane portion;
- and
- a load side projecting portion formed in the ramp portion, the load side projecting portion being formed on a loading side of the head holding plane portion for preventing movement of the tab portion from the escaping position to the direction of the recording medium,
- wherein the tab portion is movable to the escaping position to perform an unloading operation of the head support arm upon an operation stopping command of the disk device by:
- (i) applying forces in a radial direction of the recording medium and a direction perpendicular to the radial direction and a biasing force of the leaf spring portion to the head support arm;
- (ii) moving the head support arm in the radial direction of the recording medium;
- and
- (iii) abutting the tab portion on the unload side wall face of the ramp portion and is then held in the head holding plane portion as the escaping position of the tab portion by at least the biasing force of the leaf spring portion,
- wherein a load side wall face having an angle smaller than 90° with respect to the head holding plane portion is formed on the loading side of the head holding plane portion, and
- wherein the load side wall face forms a face opposed to the head holding plane portion of the load side projecting portion.
15 more elements
A disk device comprising:
- a recording medium rotatably arranged around a primary rotating axis;
- a head support arm having a head and a tab portion at one end thereof, the head support arm being capable of rotating around a first rotating axis parallel to the primary rotating axis;
- a first bearing portion arranged in a position separated from the primary rotating axis, the first bearing portion allowing rotation of the head support arm;
- a second bearing portion arranged between the head and the first bearing portion, the second bearing portion being capable of rotating around a second rotating axis perpendicular to a center line of the longitudinal direction of the head support arm;
- two or more abutting portions located on the second rotating axis and abutting on the head support arm or the second bearing portion;
- a leaf spring portion for connecting the head support arm and the second bearing portion;
- a ramp portion for holding the tab portion at an escaping time of the head support arm;
- a head holding plane portion formed in the ramp portion for holding the tab portion in an escaping position;
- an unload side wall face formed in the ramp portion, the unload side wall face being formed on an unloading side of the head holding plane portion;
- and
- a load side projecting portion formed in the ramp portion, the load side projecting portion being formed on a loading side of the head holding plane portion for preventing movement of the tab portion from the escaping position to the direction of the recording medium,
- wherein the tab portion is movable to the escaping position to perform an unloading operation of the head support arm upon an operation stopping command of the disk device by:
- (i) applying forces in a radial direction of the recording medium and a direction perpendicular to the radial direction and a biasing force of the leaf spring portion to the head support arm;
- (ii) moving the head support arm in the radial direction of the recording medium;
- and
- (iii) abutting the tab portion on the unload side wall face of the ramp portion and is then held in the head holding plane portion as the escaping position of the tab portion by at least the biasing force of the leaf spring portion,
- wherein the head holding plane portion and the load side wall face are connected by a curved surface, and
- wherein a head moving slanting face having an angle greater than 90° with respect to the head holding plane portion, and a head moving plane parallel to the head holding plane portion are formed between the head holding plane portion and the load side wall face.
15 more elements
A disk device comprising:
- a recording medium rotatable arranged around a primary rotating axis;
- a head support arm having a head and a tab portion at one end thereof, the head support arm being capable of rotating around a first rotating axis parallel to the primary rotating axis;
- a voice coil connected to the head support arm;
- a first bearing portion arranged in a position separated from the primary rotating axis, the first bearing portion allowing rotation of the head support arm;
- a second bearing portion arranged between the head and the first bearing portion, the second bearing portion being capable of rotating around a second rotating axis perpendicular to a center line of the longitudinal direction of the head support arm;
- two or more abutting portions located on the second rotating axis and abutting on the head support arm or the second bearing portion;
- a leaf spring portion for connecting the head support arm and the second bearing portion;
- a ramp portion for holding the tab portion at an escaping time of the head support arm;
- a head holding plane portion formed in the ramp portion for holding the tab portion in an escaping position;
- an unload side wall face formed in the ramp portion, the unload side wall face being formed on an unloading side of the head holding plane portion;
- and
- a load side projecting portion formed in the ramp portion, the load side projecting portion being formed on a loading side of the head holding plane portion for preventing movement of the tab portion from the escaping position to the direction of the recording medium,
- wherein the tab portion is movable to the escaping position to perform an unloading operation of the head support arm upon an operation stopping command of the disk device by:
- (i) applying forces in a radial direction of the recording medium and a direction perpendicular to the radial direction and a biasing force of the leaf spring portion to the head support arm;
- (ii) moving the head support arm in the radial direction of the recording medium;
- and
- (iii) abutting the tab portion on the unload side wall face of the ramp portion and is then held in the head holding plane portion as the escaping position of the tab portion by at least the biasing force of the leaf spring portion, and
- wherein a waveform of a driving electric current applied to the voice coil is set to a pulse waveform when the head support arm is operated on the load side.
15 more elements
Dependencies are inferred from the claim text.