Combined driving spring in the slide cover hinge of the mobile communication terminal

A combined driving spring in a slide cover hinge of a substantially flat cover of a mobile communication terminal comprising:

• a plurality of elongated member springs, each member spring being in a W-shape in a flat plane parallel to a major surface of the cover,
• the W-shape having, in the flat plane, two wings, a single peak between the two wings, and a first end and a second end at respective ends of the two wings,
• when viewed in the same flat plane, the two wings being substantially mirror-symmetrical about the peak, and the first end and the second end of the W-shape being substantially mirror-symmetrical about the peak,
• the peak extending beyond a straight line connecting the two ends of the two wings, in the same flat plane,
• said member springs being stacked in a direction that extends within the flat plane, so as to be parallel with each other in the flat plane, and being connected along their elongated sides in the flat plane, said first ends of the member springs being combined together into a first end for the combined driving spring, said second ends of the member springs being combined together into a second end for the combined driving spring;
• each of said first end and second end of said driving spring being connected with the slide cover hinge through a respective one of two connectors,
• when viewed in the same flat plane, the two connectors being substantially mirror-symmetrically located about a straight line connecting respective tops of the peaks, and the first end and the second end of said driving spring being substantially mirror-symmetrical about the straight line connecting respective tops of the peaks.