Adjustable supporting device for a display panel

An adjustable supporting device for a display panel, comprising:

• a supporting base;
• a tubular coupling member disposed uprightly on said supporting base and extending in a first direction, said coupling member having an upper end, and a lower end connected to said supporting base;
• a movable frame member movably extended into said coupling member and in friction engagement with said coupling member, said movable frame member including a frame body that has an upper end portion adapted to be coupled to the display panel, and a lower end portion formed with a receiving space and a passage groove communicated with said receiving space;
• and
• a biasing member having a straight coupling portion passing through said passage groove in said lower end portion of said frame body and coupled to said coupling member, and a spiral portion connected to said coupling portion and disposed in said receiving space in said lower end portion of said frame body, said spiral portion having an axis, said biasing member providing a biasing force such that an equilibrium state among the biasing force, a friction force between said coupling member and said movable frame member, and the combined weight of the display panel and said movable frame member is achieved so as to maintain said movable frame member at a desired extended position between upper and lower limit positions relative to said coupling member;
• wherein said movable frame member further includes an axial rod extending through said spiral portion along said axis and in a second direction transverse to the first direction, said axial rod engaging said frame body such that said spiral portion of said biasing member is positioned in said receiving space in said lower end portion of said frame body.