Browse Prior Art Database

Low Insertion Force Connector Circuit Card Actuated

IP.com Disclosure Number: IPCOM000078515D
Original Publication Date: 1973-Jan-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Doody, GE: AUTHOR

Abstract

Minimum force is required for insertion and withdrawal of printed-circuit cards with a large number of contact points, into a connector with a variable-contact opening. A cam arrangement provides the variable-contact opening, while permitting contact wipe action when the card is inserted or withdrawn.

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Low Insertion Force Connector Circuit Card Actuated

Minimum force is required for insertion and withdrawal of printed-circuit cards with a large number of contact points, into a connector with a variable- contact opening. A cam arrangement provides the variable-contact opening, while permitting contact wipe action when the card is inserted or withdrawn.

The device consists of a base 10 having a number of contacts such as 11 and 12 and similar opposing contacts on the opposite side, such as 13 along the length of 10. Between the contacts is a separating cam block 14. Block 14 moves laterally along 10 and is shaped to cam the contacts away from each other, during the insertion or withdrawal of a circuit card 15. This is accomplished by a lever 16 and cam follower 17 attached to 10 and 14, as shown in Fig. 1, wherein card 15 is partially inserted. Lever 16 in turn is moved by insertion or withdrawal of circuit card 15, which has a camming slot 18. Fig. 2 is a section of Fig. 1 which shows the spread of 11 and 13 in response to the lateral wedging movement of 14.

Card 15 locked in place is shown in Fig. 3. A continuous bias to the left is provided to 16 via spring 19, although this bias could be imparted to block 14. Contacts 11 and 12, which were cammed open by 14 until after card 15 is physically between the contacts, are released by 14 for the last portion of travel of card 15 during insertion. This permits wiping action of the contacts against the lands 20 and 21...