Assembly method for a voice coil motor

An interlocking assembly of a voice coil motor for a hard disk drive, said assembly comprising:

• an arcuate shaped base member with a top surface and a bottom surfaces said base member having a pair of upright columns molded to said top surface, said upright columns disposed at each end of said base member, a molded tapered recess formed on said top surface between said upright columns, said recess ingressing from a convex edge of said base and narrowing while extending opposite towards a concave edge, said tapered recess having side edges shaped to tightly receive and interlocking with;
• a flat arcuate shaped permanent magnet having dovetail side edges to slidely interlock with said tapered recess of said base member, and
• an arcuate shaped cover plate.

An interlocking assembly of a voice coil motor for a hard disk drive, said assembly comprising:

• an arcuate shaped base member formed by metal injection molding, said base member with a top surface and a bottom surface, a molded tapered and truncated recess formed centrally on said top surface, said recess ingressing from a convex edge of said base and narrowing while extending opposite towards a concave edge, forming a truncated recess, said recess having side edges shaped to tightly receive and to interlock with;
• a flat arcuate shaped permanent magnet having dovetail side edges to slidely interlock with said tapered recess of said base member;
• an arcuate shaped cover plate having a pair of molded down-reaching columns said columns disposed under and at each end of said base member.

A method for interlocking an assembly of a voice coil motor for a hard disk drive, comprising the steps of:

• providing an arcuate shaped hollow structure formed by metal injection molding, said hollow structure including a bottom plate member separated from a top plate member by a pair of upright members disposed therebetween, said upright members joining with inside surfaces of said plate members are disposed at each end of said hollow structure, a tapered recess formed into the inside surface of said bottom plate, said recess ingressing from a convex edge of said bottom plate and narrowing while extending through to an opposite concave edge, said tapered recess having side edges shaped to tightly interlock with a dovetail shaped member, and
• providing a flat arcuate shaped permanent magnet having dovetail side edges to slidely interlock with said tapered recess of said bottom plate of said hollow structure.