Magnetic resistance adjusting device for exerciser

Abstract

A magnetic resistance adjusting device of a stationary bicycle includes a plate pivotably connected to a frame of the bicycle and a plurality of magnetic pieces are attached on a side of the plate. The magnetic pieces are located to face a side of a periphery of an aluminum wheel of the bicycle. The plate is connected to a pulling member which pivots the plate so as to adjust a number of the magnetic pieces that face the aluminum wheel. A guide member is located on the base and the plate is guided by the guide member when the plate is pivoted such that a gap between the aluminum wheel and the plate is unchanged.

1 . A magnetic resistance type exerciser comprising: 
 a base and a post connected to a top of the base, a driving wheel rotatably connected to a first frame extending from the post and a crank connected to the driving wheel, an aluminum wheel rotatably connected to a second frame on the base and a belt connected between a center of the aluminum wheel and the driving wheel;    a plate pivotably connected to the second frame and a plurality of magnetic pieces attached on a side of the plate, the magnetic pieces being located to face a side of a periphery of the aluminum wheel, a pulling member connected to the plate so that the plate is pivoted relative to the aluminum wheel, and    a guide member located on the base and the plate being guided by the guide member when the plate is pivoted.    
   
   
       2 . The exerciser as claimed in  claim 1  wherein the guide member has two rollers which contact the side of the plate.  
   
   
       3 . The exerciser as claimed in  claim 1 , wherein the guide member has a groove defined therethrough and the plate has a protrusion which is movably engaged with the groove.  
   
   
       4 . The exerciser as claimed in  claim 1 , wherein the guide member has a curve edge and the plate has a hook which is movably hooked to the curve edge of the guide member.