Resistance control device

Abstract

A resistance control device includes a resistance generating unit and a control unit. The resistance generating unit is adapted to be disposed proximate to an outer periphery of a flywheel, and includes a magnetic member having a pivotal end, and a free end that is adapted to be biased toward the flywheel, and a driven module disposed proximate to the free end of the magnetic member, and connected to the magnetic member. The control unit includes a cam rotatably operable to move the driven module such that, the magnetic member is driven to pivot toward or away from the flywheel. The cam is located between the driven member and a rotating axis of the flywheel so as to block the free end of the magnetic member from contact with the flywheel.

What is claimed is: 
     
         1 . A resistance control device adapted to control the magnitude of a resistance that is applied to a flywheel, comprising:
 a supporting unit including a frame body, a first shaft, a second shaft and a third shaft, said first, second and third shafts being disposed on said frame body, said first shaft being adapted to permit the flywheel to be rotatably sleeved thereon;   a resistance generating unit adapted to be disposed proximate to an outer periphery of the flywheel, and including a magnetic member that has a pivotal end pivotally connected to said second shaft, and a free end adapted to be biased toward the flywheel, and a driven module that is disposed proximate to said free end of said magnetic member, and that is connected to said magnetic member; and   a control unit including a cam that is rotatably sleeved onto said third shaft, that abuts against said driven module, and that is operable to move said driven module such that, said magnetic member is driven to pivot toward or away from the flywheel, said cam being located between said driven member and a rotating axis of the flywheel so as to block said free end of said magnetic member from contact with the flywheel.   
     
     
         2 . The resistance control device as claimed in claim  1 , wherein said driven module of said resistance generating unit includes a coupling rod fixedly coupled to said magnetic member, and disposed proximate to said free end of said magnetic member, and a driven member rotatably sleeved onto said coupling rod. 
     
     
         3 . The resistance control device as claimed in  claim 2 , wherein said driven member of said driven module is a bearing. 
     
     
         4 . The resistance control device as claimed in  claim 2 , wherein:
 said cam of said control unit has an outer peripheral surface, and a surrounding groove formed along said outer peripheral surface; and   said control unit further includes a control wire partially wound on said outer peripheral surface of said cam, and partially received in said surrounding groove.   
     
     
         5 . The resistance control device as claimed in  claim 4 , wherein said cam of said control unit further has a wire receiving hole formed in said outer peripheral  1  surface, and spaced apart from said driven member of said driven module, said control wire having a fixed section that is fixedly received in said wire receiving hole of said cam, a winding section that extends from said fixed section, that is wound on said outer peripheral surface of said cam, and that is received in said surrounding groove, and a control section that extends from said winding section, and that is located outside said surrounding groove. 
     
     
         6 . The resistance control device as claimed in  claim 1 , wherein said frame body includes two vertical supporting plates, the flywheel being disposed between said supporting plates. 
     
     
         7 . The resistance control device as claimed in  claim 6 , further comprising a biasing unit connected between said supporting unit and said resistance generating unit, and including a connecting rod that is fixedly mounted to said free end of said magnetic member, and a resilient member that has two ends respectively connected to said connecting rod and one of said supporting plates of said frame body for biasing said free end of said magnetic member toward the flywheel.