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: An elongate battery pack for removable attachment to a portable computer. The battery pack includes guides at each end surface which enable the battery to be attached in a lateral fashion to the computer, and locked in place by a separate mechanical latch mechanism. One of the guides is modified to include a catch which, during attachment of the battery pack to the computer, engages a complementary guide on the computer to locally restrain that end of the battery.