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Browse Prior Art Database

Center Aligned Registration Pin

IP.com Disclosure Number: IPCOM000101896D
Original Publication Date: 1990-Sep-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Arnold, H: AUTHOR [+2]

Abstract

For the mechanical registration of components, such as circuit boards, the center of the reference (slot or bore) has to be very accurately aligned.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 91% of the total text.

Center Aligned Registration Pin

       For the mechanical registration of components, such as
circuit boards, the center of the reference (slot or bore) has to be
very accurately aligned.

      In practical use, the reference is subject to tolerances which
are not correctable by standard pins.  A 2-side spring pin 1 with an
integrated lever system, as schematically represented in the figure,
permits correcting the reference tolerances.  The advantages are in
particular that reference tolerances do not lead to center offset,
that damage to the reference is avoided, and that, as a result of the
integrated lever system, the center alignment is travel-dependent
rather than primarily force-dependent.

      Pin 1 is divided into halves (sides) 4, 5 by a slot 2 extending
parallel to the center axis 3.  The two halves are interconnected by
two outer joints 6, 7 and a central joint 8.  The strength and force
to be transmitted by these joints are subject to the size and shape
of recess 9.  A lateral force F1 acting on side 4 is transferred by
the lever action of joints 6, 7 and 8 to side 5 of the pin.
This applies by analogy to a force F2 acting on edge 5.  The force
enhancement provided by the lever system intensifies the tonglike
movement or the centering force relative to the center axis 3.  Pin 1
may have a circular, an oval or a rectangular cross-section,
depending upon the respective requirements or applications.  Pin 1
may also be used as a one- dimensio...