KEYLOCK WITH LOCKING DISC

Publishing Venue

Motorola

Related People

Abstract

There are many products in the market which require keylock feature in the main control knob to provide security to the operation of the product. In many applications, a standard keylock may be too sophisticated, too big or too costly. The proposed design provides a solution for these applications.

MmROLA Technical Developments

8

KEYLOCK WITH LOCKING DISC

by T M. Chua and Richard Gordecki

  There are many products in the market which require keylock feature in the main control knob to provide security to the operation of the product. In many applications, a standard keylock may be too sophisticated, too big or too costly. The proposed design provides a solution for these applications.

  The exploded view of the keylock with locking disc is shown in Figure 1. The locking disc has two sets of stoppers. The first set of stoppers (locating stoppers) locate the locking disc on the housing and the second set of stoppers (locking stoppers) lock the knob in the closed position. The locking disc is also equipped with a set of leaf springs which allow the disc to move up and down.

  The knob has a ring-shaped recess for the key to sit in and some slots for the teeth of the key to pass through before engaging itself with the knob. The other set of slots in the knob are designed for the engagement ofthe locking disc.

The slots on the housing engage with the locat- ing stoppers and keep the locking disc stationary.

  To unlock the knob (see Figure 2), the key must be inserted and engaged with the knob. In the proc- ess, the locking disc will be pressed down and the locking stoppers disengage horn the slots on the knob and thus allowing the knob to turn. The teeth of the key will slide on the locking disc when the knob is turned.

  To lock the knob (see Figure 3) the key is with-...