Browse Prior Art Database

Automated Population Of Keyboard Frame

IP.com Disclosure Number: IPCOM000049822D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Akam, NJ: AUTHOR [+4]

Abstract

The problem solved is to populate a keyboard frame automatically without the use of a hole position program to accommodate different models of keyboard.

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Automated Population Of Keyboard Frame

The problem solved is to populate a keyboard frame automatically without the use of a hole position program to accommodate different models of keyboard.

As shown in Fig. 1, the keyboard consists of a curved metal frame 1 with a number of holes punched in it which hold key-module housing 2 (and pads) in the appropriate positions for the particular model of keyboard. On the other side of the frame a keybutton 3 plugs into the housing, the position of which depends on the keybutton layout of the keyboard. This varies for each different model of the keyboard. There can be at least seven different types, each layout being 5 rows wide. The fifth row contains the space bar and 5 or 6 other buttons.

The assembly technique uses reverse plugging; i.e., the keyboard frame 1 is held upside down in a frame holder 4, and housings 2 are plugged in upside down, as shown in Fig. 1.

During the assembly process, the keyboard frame 1 and frame holder 4 are mounted on a carriage assembly positioned above the appropriate button pack. The carriage assembly moves at a constant speed (via stepper motor and lead screw), passing the frame under a fiber-optic light detector 5 mounted in front of the housing insertion head. Detector 5 detects the "hole to non-hole" transition accurately and by means of a counter and other logic/software, the carriage is moved the correct distance to position the insertion head exactly over the hole for inserting a housi...