Abstract: A spring bar includes a spring and two tubes are respectively connected to two ends of the spring. Each of the tubes has a slot and a plurality of positioning recesses are defined in two insides defining the slot. Two mounting collars are respectively mounted to the two extensions on the two handles and a through hole is defined through each of the mounting collars. Two positioning members each have a spring member which is biased in the mounting collar corresponding thereto and movably extend through the positioning hole and insert in the slot. An annular groove is defined in each of the positioning members so that the handles can be pulled outward after the positioning members are pushed.

Abstract: A resistance adjustment mechanism for an easy pull exerciser mainly comprises an outer shell, adjustment device, winding wheel and gear axis. The outer shell is composed of the first and second shells. The first shell has an adjustment device containing a rotating knob, a retainer and a one-way clutch bearing. The retainer is clamped and attached to the first shell with outside for the rotating knob's thread stud to pass through. Normally, the teeth on gear axis match the inner ring gear of the second shell. A flexible arrangement for gear axis makes the gear axis rotate under inward pressure, so the degree of tightness for the spiral spring can be adjusted to control the resilient force for the pull string. Therefore, when back to the normal state, the gear axis is positioned to the inner ring gear. The mechanism provides easy adjustment and secured position for the gear axis.

Abstract: A multipurpose hand puller mainly comprises at least one set of hand pullers, pedals, handgrips and operation levers, in which each set of the puller consists of a casing, brake mechanism, sheave and pulling rope. The delicately designed structure and diverse manipulation of a handgrip and operation lever provide a great number of combination and multipurpose exercises with least space occupied and maximum benefit achieved.

Abstract: The invention is an adjustable weight-bearing mechanism, especially the stepless adjustable weight-bearing mechanism designed for fitness exercise equipment that can be adjusted in accordance with one's weight bearing without the differentiation in weight, comprising a trough-shaped case equipped with a friction wheel, a spool, a one-way clutch, a return spring coil, a pressure plate and a pressure button. A pulling rope is coiled on the spool for the pulling of the fitness equipment with the one way clutch to control the friction wheel to rotate with the pulled pulling rope, while remains still in the reversal direction. Then the pressure plate allows it and the pressure button to adjust the friction caused by the revolving friction wheel to form the bearing weight during the pulling of the pulling rope, yet the weight can be adjusted with the pressure button to fit in with the user's exercising demand.

Abstract: A powerful waist twister comprises mainly a handle bar, a post column and a twisting mechanism. The twisting mechanism is housed in a base casing with a top lid, in which two rotors, two spring elements, two rotor covers, a connecting rod, and a swing shaft are installed in the manner that each of two rotor seats, mounted along the sidewall of the base casing, receives one of two rotors which are further riveted on the base casing. The connecting rod links to both rotors with the central part pivoted to the swing shaft. The terminal end of the swing shaft is hooked with two spring elements which exert the reversible force to return the swing shaft back during the swing movement. The rotor seats produce a movement in the exactly opposite direction toward the movement of the handle bar, that means while the upper body moves in the right direction, the lower body will twist in the reverse direction to render the waist twisting and swinging movement.