Base for data storage device with parallelism mounting features

• US 7,760,464 B2
• Filed: 09/08/2005
• Issued: 07/20/2010
• Est. Priority Date: 09/08/2005
• Status: Expired due to Fees

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Xu, Mo, Lim, Pohlye, Hong, YiRen
• Primary Examiner(s): KLIMOWICZ, WILLIAM JOSEPH
• Application Number:
  US11/222,058
• Publication Number:
  US 20070053100A1
• Time in Patent Office: 1,776 Days
• Field of Search: 360/97.01, 360/97.02, 360/98.07, 360/99.08, 360/99.04, 310/67.R, 310/91, 310/90
• US Class Current: 360/97.01
• CPC Class Codes: G11B 33/146 constructional details of filters
• CPC Class Codes: G11B 5/54 with provision for moving the head into or out of its operative position or across tracks

Abstract

An apparatus and associated method for making a base for a data storage device. The base has a plurality of raised pads defining coplanar supporting surfaces. The surfaces are adapted for supportingly engaging intermittent portions of a component supported by the base so that the base clearingly disengages other portions of the component between the pads.

Claims

1. A base for a data storage device comprising a sheet of selected material stamped to form a base surface and coined to form a plurality of raised pads of the selected material which continuously extend from the base surface to define spaced apart coplanar base support surfaces adapted for supportingly engaging intermittent portions of a component above the base surface, the coining of each raised pad concurrently forming an undercut disposed between said pad and an associated circumferentially extending longitudinal surface which lies along an outermost diameter of a counterbore in which said pads are disposed.

2. The base of claim 1 wherein the component is a motor, the pads contactingly support a bottom surface of a stator portion of said motor, and the circumferentially extending longitudinal surface contactingly engages an outermost edge surface of said stator portion.

3. The base of claim 1 wherein the selected material comprises steel and each of the base support surfaces, the undercuts and the longitudinal surfaces are concurrently formed by said coining operation and are not subjected to a subsequent secondary machining operation.

4. The base of claim 1 made by the process comprising the steps of:

stamping the sheet of selected material to form a medial portion of selected thickness on which the base surface is defined;

coining the raised pads to induce plastic deformation of the selected material so that the selected material continuously extends from the medial portion to the raised pads and said undercuts extend between the respective pads and the longitudinal surface;

placing the component on the plurality of raised pads; and

attaching the component to the base.

5. The base of claim 4 wherein the attaching step is characterized by press fitting the component to the base within said counterbore.

6. The base of claim 4 wherein the component is a motor and the placing step is characterized by placing a lower surface of a motor stator on the pads and an outermost edge surface of the motor stator in contacting engagement with the circumferentially extending longitudinal surface.

7. The base of claim 4 wherein the component is characterized by one or more selected components of a set consisting of a motor, an actuator, and a load/unload ramp.

8. The base of claim 1 wherein each undercut is defined by a second longitudinal surface substantially parallel to the circumferentially extending longitudinal surface and which extends from the associated base support surface of the associated pad, and a quarter-turn radiused corner surface which extends from the second longitudinal surface to the circumferentially extending longitudinal surface.

9. The base of claim 1 wherein the base has a first outer surface opposite the base surface to provide a first thickness of the selected material within the counterbore adjacent the respective pads, and the base has a second outer surface opposite the circumferentially extending longitudinal surface to provide a second thickness of the selected material substantially equal to the first thickness.

10. A data storage device comprising:

a data storage medium in a data storing and retrieving relationship with a data transfer device; and

a single piece base deck comprising a medial portion and a plurality of coined spaced apart pads which continuously extend from the medial portion to define coplanar supporting surfaces to support at least a selected one of the medium or the transfer device, the coined pads formed from a coining operation which induces plastic deformation of a sheet of selected material to concurrently form said pads and an undercut between each said pad and a circumferentially extending longitudinal surface which defines an outermost diameter of a counterbore in which said pads are disposed.

11. The data storage device of claim 10 wherein the base deck is characterized by a base member of said selected material with parallelism features integrally formed in the selected material for locating a motor which, in turn, supports the data storage medium.

12. A single piece base for a data storage device comprising a plurality of coined raised pads integrally formed in the base defining coplanar base support surfaces, the base support surfaces adapted for supportingly engaging intermittent portions of a component supported by the base so that other surfaces of the base clearingly disengage other portions of the component between the raised pads, each of the raised pads extending adjacent an outer diameter of a counterbore of the base defined by a circumferentially extending longitudinal surface to a first height that intersects a lateral surface that transitions from the outer diameter of the counterbore to a minor diameter with an undercut in the lateral surface between each said pad and said longitudinal surface.

13. The base of claim 12 made by a process comprising the steps of:

stamping a sheet of selected material to form a medial portion of selected thickness on which a base surface is defined; and

coining the raised pads to induce plastic deformation of the selected material so that the selected material continuously extends from the medial portion to the raised pads, said coining step concurrently forming each associated undercut.

14. The base of claim 12 formed from a sheet of material to provide a medial portion of first thickness from which the plurality of raised pads continuously extend, the pads each having a second thickness greater than the first thickness.

15. The base of claim 14 wherein each undercut is defined by a second longitudinal surface substantially parallel to the circumferentially extending longitudinal surface and which extends from the associated base support surface of the associated pad, and a quarter-turn radiused corner surface which extends from the second longitudinal surface to the circumferentially extending longitudinal surface.