US Patent 7971834 Support stand for flat-panel display monitor

A support stand for a flat-panel display monitor includes a rotatable bracket, a hinge assembly, a base member, a first link bracket, and a second link bracket. The first and second link brackets are rotatably assembled between the rotatable bracket and the support member via the hinge assembly. The rotatable bracket defines a pivot hole, and a guiding notch communicating with the pivot hole. The hinge assembly includes a pivotal shaft, and a positioning washer sleeved on the pivotal shaft. The pivotal shaft is engaged in the pivot hole of the rotatable bracket from the guiding notch. The positioning washer is fixed on the rotatable bracket to prevent the pivotal shaft from disengaging from the pivot hole.