Abstract: An actuator suitable for multi-directional actuation of a push button switch is disclosed. This actuator has an actuation button attached to a plunger to define a predetermined angle therebetween. The actuation button has a surface for multi-directional activation. The actuator also has a pair of hinge pins that is attached to the actuation button for pivotably mounting the actuator about a pivoting axis. Activation on any point on the surface of the actuation button results in a unidirectional moment about the pivoting axis to tilt the plunger to releasably actuate the push button switch. Also disclosed is a personal digital assistant that uses the actuator for actuating a notification switch from between two orthogonal directions.

Abstract: A lockable button mechanism for use in a portable device. The mechanism includes three button elements aligned with three switch elements, whereby the button elements may be individually depressed to activate respective switch elements. The mechanism further includes a locking element interposed between the switch elements and the button elements, the locking element being slidably displaceable between a first position in which depression of the button elements is enabled, and a second position in which the locking element blocks depression of the button elements.