Resistance device capable linearly adjusting training load

Abstract

A resistance device capable linearly adjusting training load comprising: a rack unit with two vertical rods, and two sliding units, which are connected to a handle and a pedal; a linkage unit with a chain and a belt, and are locked on the connecting plate; and two damping units make multiple magnet pieces arranged on both sides of a fixing base, and a diamagnetic metal piece is arranged on the connecting plate, and set trough the fixing base to cut the magnetic circuit generated by the magnet pieces to form damping: When the user steps on the pedal, the connecting plate will drive the metal sheet to cut the magnetic circuit, and the damping can be changed to further achieve the effect of linearly adjusting the training load.

What is claimed is: 
     
         1 . A resistance device capable linearly adjusting training load, comprising:
 a rack unit having a base frame, a support frame, and two vertical rods, the vertical rods are individually a hollow tube, stand parallelly on the base frame, and are supported by the support frame;   two sliding units, each having a linear rail, fixed on the inner edge of the vertical rods, an upper sliding seat and a lower sliding seat arranged on the two ends of a connecting plate, and are placed on the linear rail and making it to be slidable up and down, a handle and a pedal are assembled on the upper and lower seats respectively;   a linkage unit, which has a sprocket and a pulley, arranged separately up and down and between the two vertical rods, a chain and a belt are respectively arranged around the sprocket and the pulley, and the two end of each of them are connected by a connecting unit and further locked on the connecting plate of the two sliding units, so that the components of the two sliding units can slide up and down relative to each other; and   two damping units, having multiple powerful magnet pieces assembled on both sides of the concave part of a U-shaped fixing seat, and the magnet pieces of the two adjacent ones and the opposite ones have different magnetic poles, then the fixing seat is pivoted on the surface of the vertical rod by an adjusting device, a metal sheet which is diamagnetic, is assembled on the connecting plate and penetrates between the concave part of the fixing seat for cutting the magnetic circuit generated by the multiple powerful magnet pieces to form damping, so operating the adjusting device can make the fixing seat laterally displaced to change the magnetic circuit area cut by the metal sheet, thereby changing the damping.   
     
     
         2 . The resistance device capable linearly adjusting training load as claimed in  claim 1 , wherein the metal sheet is made of copper or aluminum material. 
     
     
         3 . The resistance device capable linearly adjusting training load as claimed in  claim 1 , wherein the inner edge of the vertical rod has multiple guiding blocks, which are provided with guiding grooves to let the connecting plate set through, and make the connecting plate be guided by the guiding blocks when sliding up and down to increase its stability. 
     
     
         4 . The resistance device capable linearly adjusting training load as claimed in  claim 1 , further includes a tension spring, one end of which is assembled on the wall surface of the vertical rod in a stretched state, the other end is connected to the pulley, so a tension is formed between the chain and the belt of the linkage unit. 
     
     
         5 . The resistance device capable linearly adjusting training load as claimed in  claim 1 , further includes two upper positioning plates individually assembled on the seat surface of the upper sliding seat, and the positioning plate further has multiple combination holes to let the handle to be set in the combination holes at the desired position; two lower positioning plates are individually set on the seat surface of the lower sliding seat to let the pedal to be set in the lower positioning plate; and the two ends of the connecting plate are respectively assembled on the upper edge of the upper and lower positioning plates. 
     
     
         6 . The resistance device capable linearly adjusting training load as claimed in  claim 5 , further includes at least a spring, the lower end of the spring is assembled on the wall surface of the vertical rod and the upper end is connected to the upper positioning plate, for making the spring to be stretched when the upper sliding seat slides upwards, thereby providing energy for the upper sliding seat to return. 
     
     
         7 . The resistance device capable linearly adjusting training load as claimed on  claim 1 , wherein the adjusting device of the damping unit further includes a nut, a bolt, a protective cover, and an adjusting knob; Wherein the nut is fixed at the center of the top surface of the fixing seat, the thread of the bolt corresponds to the nut and set through the nut; the protective cover is locked on the wall surface of the rear side of the vertical rod, there is a through hole on the top face to allow the head of the bolt to pass through and connect with the adjusting knob, for making the adjusting knob rotated to drive the bolt, then the nut will drive the fixing seat to displace laterally. 
     
     
         8 . The resistance device capable linearly adjusting training load as claimed in  claim 7 , wherein the damping unit further includes two guiding sleeves arranged on the inner edge of the protective cover and are provided with a guiding groove for containing the base body of the fixing base and guides the magnet pieces to move therebetween, thereby improving the stability of the lateral displacement of the fixing base. 
     
     
         9 . The resistance device capable linearly adjusting training load as claimed in  claim 7 , wherein the damping unit further includes a compression spring, which is sleeved on the outer edge of the bolt and the upper end of the nut in a compressed state, then the compression force of the compression spring can eliminate the gap between the bolt and the thread of the nut, thereby improving the effect of linear displacement of the fixing seat.