Non-right angle parallelogram PZT for suspension resonance improvement

Patent metadata

Field	Value
Publication number	US-11948611-B2
Application number	US-202318110863-A
Country	US
Kind code	B2
Filing date	Feb 16, 2023
Priority date	Feb 22, 2022
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

Examples of a suspension are provided. The suspension includes a mount plate attached to a load beam at a suspension assembly attachment point. The suspension may include a first actuator and a second actuator located at the mount plate. The first actuator is shaped as a non-right angle parallelogram spanning across a first opening in the mount plate. The second actuator is shaped as a non-right angle parallelogram spanning across a second opening in the mount plate. The first and second actuators are configured to deflect the distal end of the mount plate, which causes the load beam to rotate with a rotation center located along the load beam.

First claim

We claim:

1. A suspension assembly, comprising:
a tri-stage suspension comprising:
a mount plate attached to a distal end of a load beam;
a first actuator shaped as a non-right angle parallelogram and spanning across a first opening in the mount plate; and
a second actuator shaped as a non-right angle parallelogram and spanning across a second opening in the mount plate, wherein each of the first actuator and second actuator include a first set of parallel sides extending along a length of the tri-stage suspension at an angle and a second set of parallel sides extending along a width of the tri-stage suspension at an angle, with the first set of parallel sides are longer than that of the second set of parallel sides.

2. The suspension assembly of claim 1 , further comprising a gimbal assembly attached to the load beam, wherein the gimbal assembly includes a slider configured to write digital information on a rigid rotating disk.

3. The suspension assembly of claim 2 , further comprising a first micro-actuator and a second micro-actuator integrated within the gimbal assembly.

4. The suspension assembly of claim 1 , wherein the first and second actuators are integrated into the load beam.

5. The suspension assembly of claim 1 , wherein each of the first and second actuators includes:
a first set of parallel sides;
a second set of parallel sides; and
an acute angle of less than 45 degrees at an intersection of at least one of the first set of parallel sides and at least one of the second set of parallel sides.

6. The suspension assembly of claim 1 , wherein:
the first actuator is configured to expand toward the distal end and a first side edge of the mount plate; and
the second actuator is configured to expand toward the distal end and a second side edge of the mount plate.

7. The suspension assembly of claim 6 , wherein expansion of the first actuator causes the load beam to rotate with a rotation center located along the load beam.

8. A suspension assembly, comprising:
a mount plate attached to a distal end of a load beam;
a first actuator attached to the load beam, wherein the first actuator has a non-right angle parallelogram shape and is configured to deflect the distal end of the mount plate; and
a second actuator attached to the load beam, wherein the second actuator has a non-right angle parallelogram shape and is configured to deflect the distal end of the mount plate, wherein each of the first actuator and second actuator include a first set of parallel sides extending along a length of the suspension assembly at an angle and a second set of parallel sides extending along a width of the suspension assembly at an angle, with the first set of parallel sides are longer than that of the second set of parallel sides.

9. The suspension assembly of claim 8 , wherein:
the first actuator spans across a first opening in the mount plate; and
the second actuator spans across a second opening in the mount plate.

10. The suspension assembly of claim 8 , further comprising a gimbal assembly attached to the load beam, wherein the gimbal assembly includes a slider configured to write digital information on a rigid rotating disk.

11. The suspension assembly of claim 10 , further comprising a first micro-actuator and a second micro-actuator integrated within the gimbal assembly.

12. The suspension assembly of claim 8 , wherein the first and second actuators are integrated into the load beam.

13. The suspension assembly of claim 8 , wherein each of the first and second actuators includes:
a first set of parallel sides;
a second set of parallel sides; and
an acute angle of less than 45 degrees at an intersection of at least one of the first set of parallel sides and at least one of the second set of parallel sides.

14. The suspension assembly of claim 8 , wherein:
the first actuator is configured to expand toward the distal end and a first side edge of the mount plate; and
the second actuator is configured to expand toward the distal end and a second side edge of the mount plate.

15. The suspension assembly of claim 8 , wherein the deflection of the distal end by the first actuator causes the load beam to rotate with a rotation center located along the load beam.

Assignees

• Magnecomp Corp

Inventors

• Zhang Long
• Ee Kuen Chee
• Glaess David

Classifications

• G11B5/4833 Primary

  Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head (G11B5/484 takes precedence) · CPC title

• G11B5/5578

  Multiple actuators addressing the same disk, e.g. to improve data rate or access rate · CPC title

• G11B5/4826 Primary

  Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive (G11B5/484 takes precedence; details of head housings or structures G11B5/10, G11B5/127; adjustment relative to the record carrier G11B5/56) · CPC title

• G11B5/4873

  the arm comprising piezoelectric or other actuators for adjustment of the arm · CPC title

• G11B5/5552

  using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means · CPC title