Magnetic head gimbal seat damped against unwanted oscillation an

Details Magnetic head gimbal seat damped against unwanted oscillation an Magnetic head gimbal seat damped against unwanted oscillation an

1994-05-17

1995-12-05

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 1732, G11B 2120

Patent

active

054734878

ABSTRACT:
A flexure seat for gimbaling a magnetic head is fabricated from sheet steel, comprising a central portion to which the head is to be mounted, an intermediate portion of annular shape around the central portion, and an outer portion of semiannular shape around the intermediate portion. The central portion is joined to the intermediate portion via a first pair of bridge portions in a first direction, and the intermediate portion to the outer portion via a second pair of bridge portions aligned in a second direction at right angles with the first direction. In order to suppress the unwanted oscillation, and prevent the resonance, of the central portion, a pair of dampers, as of silicone elastomer, are formed across the spacing between the central and intermediate portions, in positions on both sides of the central portion and in alignment with the second pair of bridge portions. The damper material is applied in fluid form and solidified by exposure to light. Any excessive spreading of the damper material before solidification is prevented by providing a pair of tapering tongues projecting from at least either of the central portion and the intermediate portion toward, and terminating short of, the other.

REFERENCES:
patent: 4389688 (1983-06-01), Higashiyama
patent: 4602306 (1986-07-01), Noda
patent: 4625249 (1986-11-01), Iwata
patent: 4709285 (1987-11-01), Enami et al.
patent: 4841396 (1989-06-01), Kawasaki
patent: 4876623 (1989-10-01), Takekado
patent: 5003419 (1991-03-01), Takekado
patent: 5027238 (1991-06-01), Konishi et al.

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