Browse Prior Art Database

Removal Mechanism for Board-to-Board Connector

IP.com Disclosure Number: IPCOM000123143D
Original Publication Date: 1998-Jun-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 3 page(s) / 96K

Publishing Venue

IBM

Related People

Sugiyama, M: AUTHOR [+2]

Abstract

Disclosed is a removal mechanism for Board-to-Board connector by using a fixed screw.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 93% of the total text.

Removal Mechanism for Board-to-Board Connector

   Disclosed is a removal mechanism for Board-to-Board
connector by using a fixed screw.

   We have to use a ZIF(Zero Insertion Force) connector or use
special parts to remove more than 200-pin Borad-to-Board connector
without any stress to board.  But for Note-book PCs, there are many
restrictions for high density assembly.  So we can not use ZIF or
special parts for connector removal, and we have to take care when
removing connector by hand.
  1.  I devised new removal mechanism by using thread screw so
       as to retain the original mechanical design (eg, no impact
       to connector design, and no impact to board design).
  2.  For this mechanism, I devised a new screw and washer.

   At first, Main-board and Sub-board are fixed by 2-screws
and nuts (these nuts are fixed to Main-board by soldering) (refer to
Fig-A).  Next, I use the new screws and washers, the new screws have
a small diameter for fixing a U-washer (refer to Fig-1 and Fig-2).
Put screw through Sub-board and then attach U-washer.  Then attach
Sub-board with screw, with washer and stud onto Main-board and attach
nut (nut was fixed under the Main-board by soldering).

   To define the length of "No-thread portion" = Sub-board
thickness (t) + U-washer thickness (t1) + Half of nut thickness
(1/2T), Sub-board separates from Main-board when screw is loosened
as thread pushes U-washer and U-washer pushes Sub-board).  (refer to
Fig-3, Fig...