Abstract: A structure for connecting a cover of a portable lap-top personal computer, word processor or similar equipment having a display rotatably to a case which accommodates a body of the computer or word processor. The case and cover are electrically interconnected at coactive hinge portions thereof by a pair of deformed O-rings and a pair of flat O-rings which are implemented by conductive resilient members and are held in slidable contact with each other.

Abstract: The display plate includes a frame member having a rectangular flat portion provided with at least one opening shaped to accommodate a largest number of the plurality of light-emitting elements and a first and a second major surfaces which face each other, at least one pair of paired tongues protruding from the second major surface of the flat portion to face each other at a spacing and provided with at least two pairs of aligned openings, and at least two columnar lugs each being integrally fixed to one of the tongues in each pair in the at least one pair of paired tongues by a thin webbing. The frame member is made of a plastic. A thin designation card is fit on the first major surface of the flat portion of the frame member and formed with a plurality of openings which are associated in position with the light-emitting elements.