BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view showing a conventional spring tube having a fulcrum;
FIG. 2 is a perspective view showing a forked spring tube of the present invention;
FIG. 3 is a plane view of the forked spring tube of the present invention;
FIG. 4 is an anatomic perspective view showing the forked spring tube of the present invention used on a hinge;
FIG. 5 is a perspective view showing the forked spring tube of FIG. 4 after assembling;
FIG. 6 is an anatomic perspective view showing that the hinge using the forked spring tube of the present invention is applied to a foldable electronic product.
FIG. 7 is a perspective view showing the elements of FIG. 6 after assembling;
FIG. 8 is a sectional view taken from a sectional line A-A of FIG. 7;
FIG. 9 is a schematic developed view showing internal oil ducts in the annular slipping over portion of the forked spring tube of the present invention.