Patent ID: 7247128

Claim:
An exercise assisting instrument for assisting knee-bending exercise of a user comprising: a base; a pair of supporting columns spaced apart and standing vertically in parallel supported on the base; a chair adapted to support a user's buttocks, the chair movable along an upright path between a downward position wherein a user may be seated thereon in a sitting posture and an upward position to assist the user to a standing posture; and a lifting device mounted to the supporting columns and to the chair and having a pair of lifting arms which are operated by the user for moving the chair upward and downward as the user does knee-bending exercises by moving between a downward sitting posture and an upward standing posture, wherein said lifting device comprises a respective one of the lifting arms having one end to be manipulated by a user and its other moving end operatively coupled to a respective one of a pair of sliding members slidable in a respective one of a pair of sliding slots formed in a respective one of the supporting columns for movement between downward and upward positions thereon, a lifting mechanism coupled to the other end of the lifting arm and the sliding member for upwardly biasing said sliding member in its sliding movement between the upward and downward positions upon operation of the lifting arm by the user, and a lifting member supported on the sliding member and coupled to the chair for moving the chair upward and downward in conjunction with operation of the lifting arm by the user so as to position the chair for supporting a user's body thereon near the buttocks of the user, which chair moves upward and downward together with the user doing the knee bending exercise, whereby the user doing the knee-bending exercise may be supported on the chair any time, accordingly the user may do the knee-bending exercise safely.