Patent ID: 7775939

Claim:
A balance exercise machine comprising: a seat on which a trainee sits; a swing mechanism that swings the seat; an extendable and contractible mechanism that varies a distance between the seat and the swing mechanism by extension or contraction thereof so as to vary a stroke of a swing motion of the seat; a controller that controls the swing mechanism via the user and the extendable and contractible mechanism; a supporting unit that supports the swing mechanism rotatably around a predetermined rotation axis; and a pedestal that is to be established on a floor and supports the supporting unit rotatably around a first horizontal axis, wherein the extendable and contractible mechanism is comprised of a first inclination mechanism that is connected between the pedestal and the supporting unit, and varies an inclination angle of the rotation axis of the swing mechanism in a vertical plane, and a second inclination mechanism that varies an inclination angle of the seat; the first inclination mechanism is attached at a front portion of the pedestal and the second inclination mechanism is attached at a rear portion of the pedestal in an anteroposterior direction of the balance exercise machine; the swing mechanism is comprised of a motor, a first driving gear and a second driving gear which are respectively driven by a driving force of the motor; the first driving gear has an eccentric shaft which generates a displacement in a first vertical plane including an anteroposterior direction of the balance exercise machine and a vertical direction, and thereby, the seat is swung in the first vertical plane; and the second driving gear has an eccentric shaft which generates a displacement in a second vertical plane including a widthwise direction of the balance exercise machine and the vertical direction, and thereby, the seat is swung in the second vertical plane.