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Printed Circuit Board Back-Up Mechanism

IP.com Disclosure Number: IPCOM000034337D
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 3 page(s) / 119K

Publishing Venue

IBM

Related People

Bleau, CD: AUTHOR [+5]

Abstract

A technique is described whereby a printed circuit board back-up mechanism provides mechanical support during the component insertion process. The mechanism is designed so as to provide equal counter- acting forces, during component insertion operations, so as to prevent excessive deflection of the printed circuit board. During the component insertion process of printed circuit board fabrication, significant downward pressure is exerted against the printed circuit board. This downward pressure can be applied to any location on the board's surface. To prevent excessive deflection of the board during the insertion process, the back-up mechanism utilizes a multiplicity of locking back-up devices, equally spaced, so as to provide counter-acting forces to the components being inserted.

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Printed Circuit Board Back-Up Mechanism

A technique is described whereby a printed circuit board back-up mechanism provides mechanical support during the component insertion process. The mechanism is designed so as to provide equal counter- acting forces, during component insertion operations, so as to prevent excessive deflection of the printed circuit board. During the component insertion process of printed circuit board fabrication, significant downward pressure is exerted against the printed circuit board. This downward pressure can be applied to any location on the board's surface. To prevent excessive deflection of the board during the insertion process, the back-up mechanism utilizes a multiplicity of locking back- up devices, equally spaced, so as to provide counter-acting forces to the components being inserted. The locking back-up devices are actuated simultaneously from a single actuating shaft mechanism.

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Since components may have already been installed on the underside of the printed circuit board during an insertion operation, the mechanism utilizes a series of torsion springs within the stiffening members, so as to compensate for an uneven underside surface of the printed circuit board. The back-up mechanism is designed to be readily adaptable to conveyor assembly operations. The printed circuit board back-up mechanism consists of frame 10, as shown in Fig. 1, which is mounted onto the conveyer assembly. The printed circuit board advances, in the direction shown, until the board is positioned in place for the component insertion process. Once the printed circuit board is in position, multiple bell cranks 11 rotate clockwise, as s...