BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings,
FIG. 1A is a diagram of an electric pointing device in the prior art;
FIG. 1B is a diagram of another electric pointing device in the prior art;
FIG. 1C is a diagram of still another electric pointing device in the prior art;
FIG. 2A is a diagram of an operating structure applied to an electric pointing device according to an embodiment of this invention;
FIG. 2B is a top view of the operating structure in FIG. 2A;
FIG. 2C is a side elevation of the operating structure in FIG. 2A;
FIG. 2D is another side elevation of the operating structure in FIG. 2A;
FIG. 2E is still another side elevation of the operating structure in FIG. 2A; and
FIG. 3 is a diagram of an operating structure applied to an electric pointing device according to a variation of the present invention.