Patent ID: 7368647

Claim:
A support for a musical keyboard instrument comprising: a first leg having a semi-circular disk securely provided on a side thereof, the disk having multiple openings evenly defined along a periphery thereof, and in a radial pattern; a second leg pivotally connected to the first leg, and having first and second aligned openings respectively formed in opposing sidewalls of the second leg, the first opening having a diameter that is smaller than a diameter of the second opening, the second leg further having a sleeve disposed therein, and extending from the first opening to the second opening, the sleeve having an inside diameter that is the same as the diameter of the second opening, the second leg further having a rod formed on the sidewall having the first opening, the rod having two first spiral surfaces respectively formed at a free end thereof and facing toward each other and slanted to the side wall of the second leg, the rod further having two first stopping sidewalls respectively formed in sidewalls of the first spiral surfaces, the rod having an orifice extending therethrough, the orifice being disposed in alignment with the first opening; and an adjuster mounted between the first and second leg and having a knob having two second spiral surfaces respectively formed in a free end of the knob and engaged with the first spiral surfaces, and two second stopping sidewalls respectively formed in sidewalls of the second spiral surfaces, a spring received into the sleeve, and a bar connected to the knob and having a head engaged with one of the openings in the semi-circular disk and formed in a first end of the bar, and a second end of the bar opposite to the first end of the bar and inserted into the spring and the orifice and securely connected to the knob.