Typewriting machines – Key-board or key lever-actuating mechanism – Key lever or space-bar mounting structure
Patent
1997-03-28
1998-09-29
Burr, Edgar S.
Typewriting machines
Key-board or key lever-actuating mechanism
Key lever or space-bar mounting structure
400473, B41J 516
Patent
active
058137785
ABSTRACT:
A key underboard structure adapted to be used in a computer key board assembly having a plurality of movable keys, includes a lower board and an upper board connected together by means of bayonet engagement to sandwich therebetween a rubber pad with an electrical circuit board having a plurality of contacts corresponding to the keys interposed between the rubber pad the lower board. The rubber pad having a plurality of resilient caps received and extending through holes formed on the upper board and to each contain therein a contact pad. A driving device is constituted by a first member having one end pivoted to the upper board to overlap a second member which has an opposite end movably and rotatably received within an L-shaped member formed on the upper board. The second member has an opening to allow the first member to extend therethrough and define a pivotal connection therebetween so as to allow the driving device to be movable between an expanded, cross configuration condition to rest on the cap and a collapsed, overlapped configuration condition so that when the key is depressed, the driving device changes from the expanded condition to the collapsed condition to deform the cap from an un-deformed configuration to a depressed configuration to bring the contact pad disposed therein into contact with the associated contact of the circuit board.
REFERENCES:
patent: 3982081 (1976-09-01), Demler
patent: 5535091 (1996-07-01), Lee
patent: 5608603 (1997-03-01), Su
patent: 5625532 (1997-04-01), Seller
Behavior Tech Computer Corp.
Burr Edgar S.
Nguyen Anthony H.
LandOfFree
Key underboard structure of computer keyboard does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Key underboard structure of computer keyboard, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Key underboard structure of computer keyboard will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-680510