Base unit and disk drive apparatus

Patent metadata

Field	Value
Publication number	US-10460768-B2
Application number	US-201816104573-A
Country	US
Kind code	B2
Filing date	Aug 17, 2018
Priority date	Dec 28, 2015
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A base member includes a recessed portion extending in radial directions and recessed upward from a lower surface of the base member, and a hole extending through the recessed portion in the vertical direction. The recessed portion includes a recessed portion loop-shaped surface defining a loop-shaped surface in the radial direction. A connector is located on a lower side of the recessed portion to cover the hole portion. An adhesive is located between the connector and the recessed portion. A minimum value of a gap distance in the radial direction between an outer end of the connector and an inner end of the recessed portion in which the outer end of the connector and the inner end of the recessed portion are opposed to each other with the adhesive therebetween is greater than a minimum value of a gap in the vertical direction distance between an upper surface of the connector and the recessed portion loop-shaped surface, in which the upper surface of the connector and the recessed portion loop-shaped surface are opposed to each other with the adhesive therebetween. The adhesive includes a filler.

First claim

What is claimed is:

1. A base unit for use in a disk drive apparatus in which a gas with a density lower than that of air is sealed in a housing space defined by a base member and a cover fixed to each other, the base unit comprising:
the base member that supports a motor rotatable about a central axis extending in a vertical direction; and
a connector electrically connected to a wire in the housing space; wherein the base member includes:
a recessed portion extending in radial directions and recessed upward from a lower surface of the base member; and
a hole extending through the recessed portion in the vertical direction;

the recessed portion includes a recessed portion loop-shaped surface defining a loop-shaped surface in the radial direction;
the connector is located on a lower side of the recessed portion to cover the hole;
an adhesive is located between the connector and the recessed portion; and
a minimum value of a gap distance in the radial direction between an outer end of the connector and an inner end of the recessed portion in which the outer end of the connector and the inner end of the recessed portion are opposed to each other with the adhesive therebetween is greater than a minimum value of a gap in the vertical direction distance between an upper surface of the connector and the recessed portion loop-shaped surface, in which the upper surface of the connector and the recessed portion loop-shaped surface are opposed to each other with the adhesive therebetween; wherein
the adhesive includes a filler; and
the adhesive extends all the way around the hole.

2. The base unit according to claim 1 , wherein a surface of the adhesive on a side closer to the hole is defined between the upper surface of the connector and the recessed portion loop-shaped surface.

3. The base unit according to claim 2 , wherein
the recessed portion loop-shaped surface includes a first recessed portion loop-shaped surface, and a second recessed portion loop-shaped surface on a side of the first recessed portion loop-shaped surface closer to the hole; and
the surface of the adhesive is defined at the second recessed portion loop-shaped surface.

4. The base unit according to claim 1 , wherein at least a portion of a surface of the adhesive on a side opposite to a side closer to the hole is defined between the upper surface of the connector and the recessed portion loop-shaped surface.

5. The base unit according to claim 1 , wherein
the base member includes a collar portion recessed upward and projecting in a radial direction from an outer circumference of the recessed portion;
an extent to which the collar portion is recessed is less than an extent to which the recessed portion loop-shaped surface is recessed in the recessed portion; and
the connector includes a projecting portion projecting in the radial direction from an outer circumference thereof to be located in the collar portion.

6. The base unit according to claim 5 , wherein the projecting portion of the connector corresponds to the collar portion of the base member.

7. The base unit according to claim 1 , wherein the recessed portion loop-shaped surface has a degree of surface roughness greater than a degree of surface roughness of the upper surface of the connector.

8. The base unit according to claim 1 , wherein each of the outer end of the connector and the inner end of the recessed portion has a degree of surface roughness greater than a degree of surface roughness of the upper surface of the connector.

9. The base unit according to claim 1 , wherein the filler includes a glass bead.

10. The base unit according to claim 1 , wherein the filler includes a metal.

11. The base unit according to claim 1 , wherein the filler includes a glass bead and a metal.

12. A disk drive apparatus comprising:
the base unit of claim 1 ;
the cover;
the motor; and
an access portion that performs at least one of reading and writing of information from or to a disk supported by the motor; wherein
the motor and the access portion are accommodated in the housing space.

Assignees

• Nidec Corp
• Western Digital Tech Inc
• West Digital Tech Inc

Inventors

• Akagi Masahiro
• Ohiro Takeshi
• Yoneda Tomohiro
• Yudate akihiro
• Ishino Takayuki
• Nakamura Sho
• Kaneko Jiro
• Hayakawa Takako
• Sudo Kimihiko
• Onobu Yuta

Classifications

• G11B33/122

  Arrangements for providing electrical connections, e.g. connectors, cables, switches · CPC title

• G11B33/1466 Primary

  sealing gaskets, (gasket in general F16J) · CPC title

• G11B33/027

  Covers (G11B33/022 takes precedence; with means for guiding the record carrier G11B17/34) · CPC title

• G11B25/043

  using rotating discs · CPC title