Head driving device

Patent metadata

Field	Value
Publication number	US-12387754-B2
Application number	US-202418640280-A
Country	US
Kind code	B2
Filing date	Apr 19, 2024
Priority date	May 15, 2023
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A head driving device includes an actuator assembly driving a head member in a width direction of tape. The head driving device includes a first end support beam, a second end support beam, a first skew driving piezoelectric unit, and a second skew driving piezoelectric unit. The first end support beam is arranged between a first end portion of the head member in a length direction and a base member. The second end support beam is arranged between a second end portion of the head member in the length direction and the base member. The first skew driving piezoelectric unit and the second skew driving piezoelectric unit drive the head member around the Z-axis.

First claim

What is claimed is:

1. A head driving device moving a head member relative to tape as a recording medium, the head driving device, comprising:
a base member including a first frame portion and a second frame portion;
a head supporting member supporting the head member;
a first beam member arranged between the first frame portion and a side portion of the head supporting member and including a first base portion connected to the first frame portion and a first head side hinge portion connected to the side portion of the head supporting member;
a second beam member arranged between the second frame portion and another side portion of the head supporting member and including a second base portion connected to the second frame portion and a second head side hinge portion connected to the other side portion of the head supporting member;
a first piezoelectric unit including piezoelectric elements arranged in the first beam member;
a second piezoelectric unit including piezoelectric elements arranged in the second beam member;
a first end support beam arranged between a first end portion of the head member in a length direction and the base member; and
a first skew driving piezoelectric unit arranged in the first end support beam and comprising piezoelectric elements driving the head member.

2. The head driving device of claim 1 , wherein
the first skew driving piezoelectric unit comprises a pair of the piezoelectric elements arranged in a width direction of the head member.

3. The head driving device of claim 1 , further comprising:
a second end support beam arranged between a second end portion of the head member in the length direction and the base member; and
a second skew driving piezoelectric unit arranged in the second end support beam and comprising piezoelectric elements driving the head member in a skew direction.

4. The head driving device of claim 3 , wherein
the second skew driving piezoelectric unit comprises a pair of the piezoelectric elements arranged in a width direction of the head member.

5. The head driving device of claim 1 , further comprising:
a reinforcement member arranged between a second end portion of the head member in the length direction and the base member.

Assignees

• Nhk Spring Co Ltd

Inventors

• Nashimoto Gaku

Classifications

• G11B15/1808

  Driving of both record carrier and head (G11B15/467 takes precedence; mounting of head G11B5/52) · CPC title

• G11B5/5504

  across tape tracks · CPC title

• G11B5/584

  for track following on tapes · CPC title

• G11B5/488

  Disposition of heads (G11B5/49, G11B5/52 take precedence) · CPC title

• G11B15/1883 Primary

  for record carriers inside containers · CPC title