Intelligent disk drive having spring contacts on a board assembly for connecting to exterior-facing electrical contacts coupled to a spindle motor

• US 5,751,514 A
• Filed: 06/28/1996
• Issued: 05/12/1998
• Est. Priority Date: 09/09/1993
• Status: Expired due to Term

• Current Assignee: Western Digital Corporation
• Original Assignee: Western Digital Corporation
• Inventors: Edwards, John R., Hyde, Darryl L.
• Primary Examiner(s): Tupper, Robert S.
• Assistant Examiner(s): Miller, Brian E.
• Application Number:
  US08/671,901
• Time in Patent Office: 683 Days
• Field of Search: 360/97.01, 360/98.01, 360/98.07, 360/99.04, 360/99.08, 310/67 R, 310/90, 439/59-62, 439/81-82, 361/736, 361/748-9, 361/784-789
• US Class Current: 360/97.01
• CPC Class Codes: G11B 23/0007 Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information, volume compression or expansion circuits per se H03G7/00
• CPC Class Codes: G11B 25/043 using rotating discs
• CPC Class Codes: G11B 33/121 the apparatus comprising a single recording/reproducing device
• CPC Class Codes: G11B 33/122 Arrangements for providing electrical connections, e.g. connectors, cables, switches
• CPC Class Codes: G11B 5/4853 Constructional details of the electrical connection between head and arm
• CPC Class Codes: G11B 5/486 with provision for mounting or arranging electrical conducting means or circuits on or along the arm assembly

Abstract

An intelligent hard disk drive, which includes a head disk assembly (HDA) and a printed circuit board assembly (PCBA), has a thin configuration. The HDA includes a spindle motor and the PCBA includes spindle motor driver circuitry. Spring loaded contacts and exposed electrical contacts provide automatic electrical connection between the spindle motor and the spindle motor driver circuitry.

Claims

1. An intelligent disk drive comprising:

a head disk assembly defining a substantially sealed interior and having an exterior which is outside of the substantially sealed interior, the head disk assembly including;

a base having a motor mounting hole;

a spindle motor having a generally cylindrical, axially extending portion and a generally planar surface portion, with the generally cylindrical portion terminating at the generally planar surface to define a step;

the spindle motor being mounted to the base such that an axially extending portion of the generally cylindrical portion is surrounded by the hole in the base, and the generally planar surface defines a generally circular portion of the exterior of the head disk assembly;

a magnetic disk mounted to be rotated by the spindle motor;

conductive lead means having a first, second, and third strip portions, the first strip portion lying flat against the generally planar surface of the spindle motor;

the second strip portion lying against the step; and

the third strip portion having a plurality of exterior-facing electrical contacts, the conductive lead means provided on the exterior of the head disk assembly and;

a board assembly including;

a printed circuit board and control circuitry for the spindle motor;

the printed circuit board having a planar surface and an opening;

the control circuitry being attached to the printed circuit board;

the board assembly being mounted to the head disk assembly such that the opening is aligned with the exterior-facing electrical contacts and such that the planar surface of the board faces away from the exterior-facing electrical contacts; and

a plurality of spring contacts for electrically connecting the exterior-facing electrical contacts to the control circuitry;

each spring contact having;

a tab portion inserted into the planar surface of the printed circuit board, and

a spring portion extending from the tab portion through the opening to contact a respective one of the plurality of exterior-facing electrical contacts.

2. An intelligent disk drive according to claim 1, wherein each spring contact comprises a curved portion, and a strip extending from the curved portion and abutting the bottom surface of the printed circuit board;

and wherein the tab portion projects from the strip.

3. An intelligent disk drive according to claim 1, wherein each spring contact has a scored off break point resulting from being separated from a carrier during installation.

4. An intelligent disk drive according to claim 1, wherein the conductive lead means comprises a flexible printed cable.

5. An intelligent disk drive according to claim 4, wherein the flexible printed cable has an end portion remote from the spindle motor and wherein the head disk assembly has means for retaining the end portion of the flexible printed cable.