Browse Prior Art Database

Key Lock Mechanism for Keyboard

IP.com Disclosure Number: IPCOM000045848D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Hara, O: AUTHOR [+2]

Abstract

To lock a key in such a type of keyboard that a stem for the key is deeply inserted into a hole of a key-top to get tight connection therebetween, a coil spring is provided for the stem so that the operator can feel the key to be very heavy when trying to depress it, whereby the key is substantially locked.

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Key Lock Mechanism for Keyboard

To lock a key in such a type of keyboard that a stem for the key is deeply inserted into a hole of a key-top to get tight connection therebetween, a coil spring is provided for the stem so that the operator can feel the key to be very heavy when trying to depress it, whereby the key is substantially locked.

For this purpose, a conical coil spring can be most favorably used because, when it is mounted to the stem and the key-top is attached thereto, the spring can shrink enough to enable the stem to be deeply inserted into the key-top's hole. Referring to the figures, the conical spring is attached to the key as follows: 1. Key-top 1 is removed from stem 2 (Fig. 1).

2. Conical spring 3 is provided for stem 2 (Fig. 2).

3. Key-top 1 is attached to stem 2 and depressed strongly

enough to get a tight connection therebetween (Fig. 3).

4. Normally, key-top 1 is not biased by spring 3, but only

when the key is depressed, it can be reacted by spring 3 to

substantially lock the key (Fig. 4).

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