Head driving device
A data storage device includes a tape as a recording medium; a head member including a length larger than a width of the tape; and an electrical element expanding and contracting based on a polarity and an applied voltage. The head member is moved in a state where the voltage is applied and the electrical element expands or contracts.
1 . A data storage device comprising:
a tape as a recording medium;
a head member having a width and a length which is longer than the width, the head member comprising a first side portion and a second side portion each extending in the length direction of the head member;
a first beam located on a side of the first side portion;
a second beam located on a side of the second side portion;
a first piezoelectric unit provided in contact with the first beam, the first piezoelectric unit comprising a first piezoelectric element which expands and contracts along the width direction of the head member thereby moving the first beam in a direction along a surface of the first beam; and
a second piezoelectric unit provided in contact with the second beam, the second piezoelectric unit comprising a second piezoelectric element which expands and contracts along the width direction of the head member thereby moving the second beam in a direction along a surface of the second beam.
2 . The data storage device according to claim 1 , wherein the tape is a magnetic tape.
3 . The data storage device according to claim 1 , wherein the head member is a magnetic head configured to read data from the tape.
4 . The data storage device according to claim 1 , wherein:
the first piezoelectric unit comprises the first piezoelectric element which expands and contracts in a direction along the surface of the first beam based on a polarity and an applied voltage,
the second piezoelectric unit comprises the second piezoelectric element which expands and contracts in a direction along the surface of the second beam based on a polarity and an applied voltage, and
the head member is moved relative to the tape by the first piezoelectric unit and the second piezoelectric unit.
5 . The data storage device according to claim 4 , wherein the head member is moved in a width direction of the tape by the first piezoelectric element and the second piezoelectric element.
6 . The data storage device according to claim 4 , wherein the first piezoelectric unit comprises a plurality of the first piezoelectric elements and the second piezoelectric unit comprises a plurality of the second piezoelectric elements.
7 . A head driving device comprising:
a head member having a width and a length which is longer than the width, the head member comprising a first side portion and a second side portion each extending in the length direction of the head member;
a first beam located on a side of the first side portion;
a second beam located on a side of the second side portion;
a first piezoelectric unit provided in contact with the first beam, the first piezoelectric unit comprising a first piezoelectric element which expands and contracts along the width direction of the head member thereby moving the first beam in a direction along a surface of the first beam; and
a second piezoelectric unit provided in contact with the second beam, the second piezoelectric unit comprising a second piezoelectric element which expands and contracts along the width direction of the head member thereby moving the second beam in a direction along a surface of the second beam.
8 . A head driving device comprising:
a head member having a width and a length which is longer than the width, the head member comprising a first side portion and a second side portion each extending in the length direction of the head member;
a first suspension comprising a first beam located on a side of the first side portion;
a second suspension comprising a second beam located on a side of the second side portion;
a first piezoelectric unit provided in contact with the first beam of the first suspension, the first piezoelectric unit comprising a first piezoelectric element which expands and contracts along the width direction of the head member thereby moving the first beam in a direction along a surface of the first beam; and
a second piezoelectric unit provided in contact with the second beam of the second suspension, the second piezoelectric unit comprising a second piezoelectric element which expands and contracts along the width direction of the head member thereby moving the second beam in a direction along a surface of the second beam.