Support stand for flat-panel display monitor

1. A support stand for a flat-panel display monitor, comprising:

a mounting base;

a connecting base;

two link shafts, each link shaft having a first end rotatably connected to the mounting base and a second end rotatably connected to the connecting base;

a restricting pole fixed to the mounting base and positioned between the two link shafts, the restricting pole abuts against the two link shafts, thus restricting a rotary range of the two link shafts;

a first support bracket and a second support bracket rotatably connected to the mounting base and the connecting base; and

a pivot assembly comprising a pivotal shaft and a fastening member; wherein the mounting base defines a pivot hole; the pivotal shaft inserts through one end of the first support bracket, the restricting pole, the pivot hole of the mounting base, one end of the second support bracket, and engages with the fastening member.

2. The support stand of claim 1 , further comprising a resilient member positioned between the mounting base and the connecting base to provide resilient force.

3. The support stand of claim 2 , wherein the resilient member is a helical spring; the mounting base forms a first hook; the connecting base forms a second hook; the two ends of the resilient member are fixed respectively to the first and second hooks.

4. The support stand of claim 1 , wherein the restricting pole is integrally formed with the mounting base.

5. The support stand of claim 1 , wherein the mounting base defines two receiving through holes in opposite sides of the pivot hole; the support stand further comprises four rotatable assemblies, each rotatable assembly comprises a rotatable shaft and a latching member, the rotatable shaft inserts through one end of the link shaft, one receiving through hole of the mounting base, and engages with the latching member.

6. The support stand of claim 5 , wherein an end of the rotatable shaft defines a latching groove; the latching member is a C-shaped latching ring engaged in the latching groove.

7. The support stand of claim 5 , further comprising two frictional members received respectively in the two receiving through holes of the mounting base; an inner surface of each receiving through hole defines a slot; each frictional member forms a fixing portion, the fixing portion is inserted in the slot.

8. The support stand of claim 7 , wherein the frictional member comprises a frictional portion, the frictional portion is substantially cylindrical and has a slit extending substantially parallel to a central axis of the frictional portion; the fixing portion is formed on the frictional portion adjacent to the slit.

9. The support stand of claim 1 , wherein a threaded portion is formed at an end of the pivotal shaft; the fastening member is a nut engaged with the threaded portion.

10. A support stand for a flat-panel display monitor, comprising:

a first connecting module;

a second connecting module; and

two link shafts, each link shaft having a first end rotatably connected to the first connecting module and a second end rotatably connected to the second connecting module;

wherein the first connecting module comprises a restricting pole positioned between the two link shafts, the restricting pole abuts against the two link shafts, thus restricting a rotary range of the two link shafts; the second connecting module comprises a mounting bracket rotatably connected to the two link shafts; the support stand further comprises a first support bracket and a second support bracket rotatably connected to the first and second connecting modules, and a first pivot assembly comprising a first pivotal shaft and a fastening member; the first connecting module further comprises a mounting base defining a pivot hole; the first pivotal shaft inserts through one end of the first support bracket, the restricting pole, the pivot hole of the mounting base, one end of the second support bracket, and engages with the fastening member.

11. The support stand of claim 10 , wherein the mounting bracket comprises a base portion, a first side portion and a second side portion, both portions extending substantially perpendicularly from opposite sides of the base portion; each of the first and second side portions defines a circular pivot hole; the second connecting module comprises a connecting base positioned between the first and second side portions, the connecting base defines a non-circular pivot hole; the support stand further comprises a second pivot assembly comprising a second pivotal shaft inserted through the circular pivot holes of the mounting bracket and the non-circular pivot hole of the connecting base.

12. The support stand of claim 11 , wherein the second connecting module further comprises a torsion assembly sleeved on the second pivotal shaft; the first side portion of the mounting bracket defines a first fixing hole; the connecting base defines a second fixing hole; the torsion assembly comprises a torsion spring, two ends of the torsion spring are inserted respectively in the first and second fixing holes.

13. The support stand of claim 11 , wherein the second connecting module further comprises a limiting member sleeved on the second pivotal shaft; the limiting member forms a limiting piece on an edge; the second side portion of the mounting bracket defines a limiting groove; the limiting piece engages in the limiting groove.

14. The support stand of claim 13 , wherein the second connecting module further comprises a washer sleeved on the second pivotal shaft and positioned adjacent to the limiting member to reduce wear and tear of the limiting member.

15. The support stand of claim 11 , wherein the second connecting module further comprises an elastic member sleeved on the second pivotal shaft to provide an elastic force along the second pivotal shaft.

16. The support stand of claim 10 , further comprising a resilient member positioned between the first and second connecting modules to provide resilient force.

17. The support stand of claim 16 , wherein the resilient member is a helical spring, the first connecting module includes a first hook, the second connecting module includes a second hook; the two ends of the resilient member are fixed respectively to the first and second hooks.