Patent ID: 7024727

Claim:
A coupling structure coupled between a base and a display panel for enabling said display panel to be rotatable relative to said base, the coupling structure comprising: a pivot structure, said pivot structure fixedly fastened to a top side of said base; a rotary platform, said rotary platform comprising a pivot member pivotally coupled to said pivot structure for allowing rotation of said rotary platform on said pivot structure, an open chamber, and a guide structure; a gear set arranged inside the open chamber of said rotary platform, said gear set comprising a center gear coaxially fixedly fastened to said pivot structure, a left-side gear pivotally mounted in said rotary platform and meshed with said center gear at one side, and a right-side gear pivotally mounted in said rotary platform and meshed with said center gear at one side opposite to said left-side gear, said left-side gear and said right-side gear having the same number of teeth, at least one of said left-side gear and said right-side gear having a raised portion; and a hinge member received inside the open chamber of said rotary platform and fixedly fastened to said display panel, said hinge member having at least one elongated blind hole disposed in a bottom face thereof and coupled to the at least one raised portion at said left-side gear and said right-side gear, and a guide structure coupled to the guide structure of said rotary platform; wherein when rotating said rotary platform on said pivot structure, said center gear drives said left-side gear and said right-side gear to rotate around said center gear, thereby causing said at least one raised portion to drive the at least one elongated blind hole of said hinge member to move along the guidance of the guide structure of said hinge member and the guide structure of said rotary platform.