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Coil Lead Termination System for Magnetic Head Assemblies

IP.com Disclosure Number: IPCOM000086519D
Original Publication Date: 1976-Sep-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Luoma, RW: AUTHOR

Abstract

Read and erase coils 10 and 12 (Figs. 1 and 2) in a magnetic head 14, disposed on a flexible leaf spring 16 which holds head 14 in data transferring contact with a rotatable magnetic disk 18, have output leads 20 and 22 which are encapsulated on leaf spring 16. The coils connect with a flexible cable 24 bonded on leaf spring 16 so that coil lead breakage due to lead vibration and relative motion between coils 10 and 12 and the ends of leads 20 and 22 is substantially eliminated.

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Coil Lead Termination System for Magnetic Head Assemblies

Read and erase coils 10 and 12 (Figs. 1 and 2) in a magnetic head 14, disposed on a flexible leaf spring 16 which holds head 14 in data transferring contact with a rotatable magnetic disk 18, have output leads 20 and 22 which are encapsulated on leaf spring 16. The coils connect with a flexible cable 24 bonded on leaf spring 16 so that coil lead breakage due to lead vibration and relative motion between coils 10 and 12 and the ends of leads 20 and 22 is substantially eliminated.

The coil lead termination system is part of a magnetic head assembly for use with disk 18. It includes a swingable arm 26 having spring 16 fixed thereto by means of a spacer 28. A relatively rigid sheetmetal part 30, fixed at its lower end to leaf spring 16, extends around part of head 14 and is embraced by a part 26a of arm 26 so that head 14 can be removed from a contacting relationship with respect to disk 18, by swinging arm 26, in the direction away from disk 18.

Spring 16 includes leg portions 16a and 16b and a bridging portion 16c at the top which connects the portions 16a and 16b together. Flexible cable 24 has corresponding parts 24a, 24b and 24c which lie on the outer surface of the spring parts 16a, 16b and 16c and are bonded with respect to the portions 16a, 16b and 16c (Fig. 2). Cable 24 includes leads 24x in its portion 24a and leads 24y in its portion 24b. Cable 24 constitutes a relatively thin piece of flexible plastic in which the leads 24x and 24y are encapsulated. Leads 24x and 24y have terminations 24z in the portion 24c, and the ends of leads 20 and 22 are soldered at terminations 24z to the leads 24x and 24y (Fig. 4).

Leads 2...