Browse Prior Art Database

Keyboard Tilt Mechanism

IP.com Disclosure Number: IPCOM000050551D
Original Publication Date: 1982-Nov-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Golledge, I: AUTHOR

Abstract

Adjustment of downwardly extending legs pivotally mounted towards the rear edge of a free-standing keyboard by rotation about the pivot axis to one of several detent positions changes the height of the rear edge of the keyboard and thus the operating angle of the keyboard surface.

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Keyboard Tilt Mechanism

Adjustment of downwardly extending legs pivotally mounted towards the rear edge of a free-standing keyboard by rotation about the pivot axis to one of several detent positions changes the height of the rear edge of the keyboard and thus the operating angle of the keyboard surface.

Adjustable legs 1 supporting the rear edge of keyboard 2 are shown rotated to an intermediate position in Fig. 1. The tilt adjustment is made by means of a knob 3 fitted one on each side of the keyboard body, to each of which is attached the leg 1 movable within a recess in the underside of the keyboard body. Details of the tilt detent mechanism are shown in the three views of Fig. 2.

The knob 3 enters the body 2, passes through the adjustable leg 1, and is held in place by retaining clip 4. Section A-A shows locking teeth 5 of the knob 3 and matching recesses 6 in the body 2.

There are four teeth on the knob and eight recesses in the body, giving 90 degrees 30 degrees and 0 degree positions of the leg. To make a tilt adjustment, the knob 3 is pressed into the body against the action of spring 7. The teeth 5 pass through the matching recesses 6 and enter a space 8 inside the body where they are free to turn. The knob moulding 9 through the leg 1 has a square cross-section which is continually engaged with a square hole in the leg, so that when the knob is depressed, they may be turned together. A cylindrical end portion 10 of the knob passes through a further hol...