Bio-mechanical finger brace assembly
The disclosure provides apparatus and methods of use pertaining to a biomechanical finger brace assembly. In one embodiment, the assembly includes a coupling tip, a proximal ring configured to concentrically receive a user's finger, a distal ring configured to concentrically receive the finger, and a rocker formed in an H-shape. The distal ring and the rocker are pivotally suspended between a proximal coordinated pivot point anchored on the proximal ring and a distal coordinated pivot point anchored on the coupling tip, such that movements of the finger within the proximal ring articulate the distal ring together with the rocker to articulate the coupling tip. The coupling tip may include an open end or an enclosed recess to accept a minimally-amputated or non-amputated finger. Other embodiments are also disclosed.
1. A biomechanical brace assembly for a user's residual digit, comprising:
a coupling tip;
a proximal ring configured to concentrically receive the residual digit with a snug fit;
a distal ring configured to concentrically receive the residual digit with a snug fit; and
a rocker, wherein the distal ring and the rocker are pivotally suspended between two proximal coordinated pivot points anchored on the proximal ring and two distal coordinated pivot points anchored on the coupling tip;
wherein the distal coordinated pivot points comprise a first hinged connection between the distal ring and the coupling tip and a third hinged connection between the rocker and the coupling tip;
wherein the proximal coordinated pivot points comprise a second hinged connection between the distal ring and the proximal ring and a fourth hinged connection between the rocker and the proximal ring; and
wherein the rocker defines an H-shape having opposing first and second ends, the first end forming a first split prong at the third hinged connection, and the second end forming a second split prong at the fourth hinged connection.
2. The biomechanical brace assembly of claim 1 , wherein:
the first hinged connection between the distal ring and the coupling tip and the second hinged connection between the distal ring and the proximal ring define a midline relative to a z-axis;
the third hinged connection between the first split prong of the rocker and the coupling tip is located below the midline; and
the fourth hinged connection between the second split prong of the rocker and the proximal ring is located above the midline, such that a relative rotational motion between the proximal ring and the distal ring causes a relative rotational motion between the distal ring and the coupling tip to emulate a finger's natural closing motion.
3. The biomechanical brace assembly of claim 2 , wherein a centerline bisects the assembly relative to a y-axis, and wherein the first, second, third, and fourth hinged connections each comprise a pair of parallel pivotal hinges that are symmetric about the centerline.
4. The biomechanical brace assembly of claim 1 , wherein the coupling tip comprises a recess to accept a fingertip.
5. The biomechanical brace assembly of claim 4 , wherein the coupling tip further comprises a tip pad.
6. A biomechanically driven brace assembly for a user's residual finger, comprising:
a distal ring configured to fit snugly about a middle phalanx of the finger in a ring-like manner;
a coupling tip directly coupled with the distal ring via a first hinged connection;
a proximal ring configured to fit snugly about the proximal phalanx of the finger in a ring-like manner, the proximal ring directly coupled with the distal ring via a second hinged connection; and
a rocker indirectly coupled with the distal ring via a third hinged connection with the coupling tip and a fourth hinged connection with the proximal ring, wherein:
the first and second hinged connections define a midline relative to a z-axis;
the third hinged connection is located below the midline; and
the fourth hinged connection is located above the midline, such that a relative rotational motion between the proximal ring and the distal ring causes a relative rotational motion between the distal ring and the coupling tip to emulate a finger's natural closing motion.
7. The biomechanically driven brace assembly of claim 6 , wherein the first and third hinged connections align at distal coordinated pivot points on the coupling tip, and wherein the second and fourth hinged connections align at proximal coordinated pivot points on the proximal ring.
8. The biomechanically driven brace assembly of claim 6 , wherein when in use, the assembly and the finger are concentric.
9. The biomechanically driven brace assembly of claim 6 , wherein the rocker defines an H-shape having opposing first and second ends, the first end forming a first split prong at the third hinged connection, and the second end forming a second split prong at the fourth hinged connection.
10. The biomechanically driven brace assembly of claim 9 , wherein a centerline bisects the assembly relative to a y-axis, and wherein the first, second, third, and fourth hinged connections each comprise a pair of parallel pivotal hinges that are symmetric about the centerline.
11. The biomechanically driven brace assembly of claim 6 , wherein the coupling tip comprises one of an open end and a recess to accept a fingertip.
12. The biomechanical brace assembly of claim 6 , further comprising one or more mechanical hard-stops configured to prevent relative over-rotation at the first, second, third, or fourth hinged connections.