| CPC A63B 21/4029 (2015.10) [A63B 21/154 (2013.01); A63B 21/4035 (2015.10)] | 21 Claims |
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1. A bench seat training structure with adjustable resistance, comprising:
a base frame, which is extended in a horizontal direction and is provided with a first support portion and a second support portion on each end in the horizontal direction, with the base frame being provided with a bench portion in the horizontal direction, the length of the bench portion being extended in the horizontal direction, and the first support portion, the second support portion, and the bench portion jointly defining a bottom space;
at least one transmission unit, which is disposed on the base frame and includes a pull cord, with the pull cord being provided with a free end and a fixed end;
an adjustable resistance unit, which is disposed in the bottom space of the base frame with adjustable resistance; and
at least one retracting unit, wherein the number of the retracting unit corresponds to the number of the transmission unit, the at least one retracting unit is disposed on the base frame and is connected to the at least one transmission unit respectively and also connected to the adjustable resistance unit, and the at least one retracting unit provides a restoring force to the corresponding transmission unit, with the restoring force being opposite to the operational force,
wherein, the fixed end is directly or indirectly connected to the adjustable resistance unit, an operational force is applied to the free end, the resistance is applied to the fixed end, and the operational force drags the pull cord to move on a moving path, and
wherein the at least one transmission unit includes a pulley set, the pulley set includes a moving pulley and a fixed pulley, and the pull cord wraps around the moving pulley and the fixed pulley, with that the at least one retracting unit includes a spindle, a transmission wheel, a one-way wheel, a retractor, a connecting piece, and an auxiliary pulley; and with that the spindle is pivoted on the base frame, the transmission wheel is fixed on the spindle, a one-way bearing is disposed between the one-way wheel and the spindle, the retractor is connected to the spindle, the retractor includes a casing and a volute spring, an end of the volute spring is fixed on an inner wall of the casing, the other end of the volute spring is fixed on the spindle, and the connecting piece is connected to the one-way wheel and the moving pulley.
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