Patent ID: 7988652

Claim:
A joint brace adjustable device, comprising a first brace, a second brace, and a pivotal disc fixedly coupled to said first brace and pivotally coupled to said second brace, wherein said pivotal disc has a motion-limit member and a positioning slot, and said positioning slot has a plurality of positioning notches, and wherein said second brace has a positioning member used to fix an angle of said first brace and said second brace, and characterized in that said motion-limit member includes a range-adjust member rotatable with respect to said pivotal disc, a plurality of position-fix slots formed on said pivotal disc, a slide block arranged inside said position-fix slot and pressed by said range-adjust member to move toward the circumference of said pivotal disc, an elastic element arranged on one end of said slide block and pushes said slide block toward an axis of said pivotal disc, and a block portion formed on one end of said second brace, and that said positioning member has a positioning rod with one end of thereof matching the shape of said positioning notch and a switch knob coupled to said positioning rod, and that said pivotal disc has an upper disc and a lower disc; said first brace is fixedly coupled to between said upper disc and said lower disc; said second brace are pivotally coupled to between said upper disc and said lower disc, and that said pivotal disc has two limit elements respectively blocking two lateral edges of said second brace; wherein contact surfaces of said range-adjust member and said slide block respectively have inclines; said range-adjust member has contact grooves in points where said range-adjust member presses against said slide block, and said contact grooves correspond to said slide block.