Micro-actuator including electrical connection shifting circuit, head gimbal assembly and disk drive unit with the same
AssigneeSAE Magnetics (H.K.) Ltd.
InventorHanhui Li
Life of this patent
Estimating the term…
Abstract
A micro-actuator for a HGA includes a frame having a pair of side arms and a connection plate that interconnects the two side arms at one end thereof; a PZT element attached to at least one of the side arms; and an electrical connection shifting device to connect with the PZT element and the connection plate physically. The electrical connection shifting device is electrically connected with the PZT element for shifting an electrical connection position of the micro-actuator with a suspension of the HGA from the PZT element to the connection plate. The invention also discloses a HGA and a disk drive unit with the micro-actuator.
Claims13
A micro-actuator for a head gimbal assembly, comprising:
- a frame comprising a pair of side arms and a connection plate that interconnects the two side arms at one end thereof;
- a piezoelectric element attached to at least one of the side arms;
- and
- an electrical connection shifting circuit to connect with the piezoelectric element and the connection plate physically;
- wherein
- the electrical connection shifting circuit has one end thereof electrically and physically connected with the piezoelectric element and the other end thereof extending along the frame from the piezoelectric element and terminated at the connection plate and configured to electrically and physically connect with a suspension for shifting an electrical connection position of the micro-actuator with the suspension of the head gimbal assembly from the piezoelectric element to the connection plate.
A head gimbal assembly, comprising:
- a slider;
- a micro-actuator;
- and
- a suspension to hold the micro-actuator and the slider;
- wherein the micro-actuator comprising:
- a frame comprising a pair of side arms and a connection plate that interconnects the two side arms at one end thereof;
- a piezoelectric element attached to at least one of the side arms;
- and
- an electrical connection shifting circuit to connect with the piezoelectric element and the connection plate physically;
- wherein
- a plurality of connection pads are disposed on the suspension at positions adjacent to the connection plate;
- the electrical connection shifting circuit has one end thereof electrically and physically connected with the piezoelectric element and the other end thereof extending along the frame from the piezoelectric element and terminated at the connection plate to electrically and physically connect with the connection pads of the suspension, thereby shifting an electrical connection position of the micro-actuator with the suspension of the head gimbal assembly from the piezoelectric element to the connection plate.
A disk drive unit comprising:
- a head gimbal assembly;
- a drive arm connected to the head gimbal assembly;
- a disk;
- and
- a spindle motor operable to spin the disk;
- wherein
- the head gimbal assembly includes:
- a slider;
- a micro-actuator;
- and
- a suspension to support the micro-actuator and the slider;
- wherein the micro-actuator comprises:
- a frame comprising a pair of side arms and a connection plate that interconnects the two side arms at one end thereof;
- a piezoelectric element attached to at least one of the side arms;
- and
- an electrical connection shifting circuit to connect with the piezoelectric element and the connection plate physically;
- wherein:
- a plurality of connection pads are disposed on the suspension at positions adjacent to the connection plate;
- the electrical connection shifting circuit has one end thereof that is electrically and physically connected with the piezoelectric element and the other end thereof extending along the frame from the piezoelectric element and terminated at the connection plate to electrically and physically connect with the connection pads of the suspension, thereby shifting an electrical connection position of the micro-actuator with the suspension of the head gimbal assembly from the piezoelectric element to the connection plate.
Dependencies are inferred from the claim text.