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Card Retention Bracket

IP.com Disclosure Number: IPCOM000029569D
Original Publication Date: 2004-Jul-07
Included in the Prior Art Database: 2004-Jul-07
Document File: 4 page(s) / 415K

Publishing Venue

IBM

Abstract

Compact retention design in which standoffs mounted along the card leading edge, interact with flexible snap-like features of a molded plastic bracket, mounted to the main board.

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Card Retention Bracket

The purpose of the card retention bracket is to keep cards from unplugging due to vibration, shock, etc. Due to the space constraints, retention had to be implemented under the card leading edge, instead of on the outside edges, which is more common. The design shown in Figure 1 can accommodate three cards but can be modified to hold as many cards as needed and at any pitch required.

     In our particular application, we have very limited space around the cards. By utilizing the area directly below the card leading edge, we can achieve proper retention in the space provided. The first advantage is that we have card retention with a tool-less bracket. The second, is that most retention utilizes the outside edges of the card and require multiple mechanical parts for latching which drives complexity and cost. These mechanical parts require more space in order for the cards to be retained in their connectors. By utilizing this method of card retention, the cards can be arranged at a smaller pitch, therefore providing a more dense packaging design.

     The card retention bracket is attached to the main board. The cards that plug into the main board have posts or stand-offs attached to them. As the card is plugged, the flexible plastic features on the retention bracket are deflected inward by the posts or stand-offs on the card. Figure 2 shows the card in it's unplugged state. Figure 3 shows the card fully plugged and the bracket latched around the stand...