Key structure for computer keyboards
US5372442A · kind A · utility
Inventor
Key dates
| Filing date | Sep 9, 1993 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Sep 9, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J5/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.