Typewriting machines – Key-board or key lever-actuating mechanism – Key-cap or key-stem structure
Patent
1993-09-09
1994-12-13
Burr, Edgar S.
Typewriting machines
Key-board or key lever-actuating mechanism
Key-cap or key-stem structure
4004912, 400495, 400472, 200345, 200341, B41J 516
Patent
active
053724429
ABSTRACT:
A key unit includes a key a hollow housing securely mounted on a base frame of a computer keyboard, an actuating member, and a spring member. The hollow housing includes a top wall with an opening, a first pair of opposed side walls, and a second pair of opposed side walls. A vertical track is formed in each of inner surface of the first pair of opposed side walls. A resounding plate is mounted on an inner surface of one of the second pair of opposed side walls. The actuating member includes an upper column which extends through the opening in the housing and is adapted to engage with the key. An extension projects outward from each of two opposed sides of the upper column for engaging with the associated vertical track in the housing. The spring member includes an axle which is pivotally mounted between the first pair of opposed side walls and first and second arcuate members projecting outward from the axle and extending away from each other. The first arcuate member includes a distal activating end for impinging on a corresponding contact on the base frame of the keyboard. The second arcuate member is elastic and includes a bent section for impinging on the resounding member and a distal actuated end which is actuatable by the actuating member.
REFERENCES:
patent: 4935591 (1990-06-01), Kaneko
patent: 4939327 (1990-07-01), Wu et al.
patent: 4942276 (1990-07-01), Kato
patent: 5263783 (1993-11-01), Wu
Burr Edgar S.
Hendrickson Lynn D.
LandOfFree
Key structure for computer keyboards 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 structure for computer keyboards, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Key structure for computer keyboards will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1189305