Resistance device for a physical exerciser

Abstract

A resistance device for a physical exerciser includes a cylindrical housing formed with two diagonally opposite chambers at two opposite sides thereof, a fastener fixedly mounted on an inner side thereof, and a groove formed on an inner side thereof and arranged under the fastener, a pair of actuating rods inserted into a respective one of the chambers and provided with a hook and connected with a spring by a pin, an upper end of the spring being connected with the fastener, a pair of buttons pivotally connected with a top of the cylindrical housing, a tubular axle fitted within the cylindrical housing and provided with a first set of teeth and a second set of teeth which are positioned together beside each other and operate in opposite circular direction, an axle formed with a spiral groove extending through an outer surface thereof, a core member fitted within the tubular axle and having a radial hole aligned with the spiral groove, a pin inserted through the spiral groove so that a lower portion of the pin is fitted into the radial hole of the core member, and a cover fixedly mounted on a cylindrical housing.

I claim:  
     
         1 . A resistance device for a physical exerciser comprising: 
 a cylindrical housing formed with two diagonally opposite chambers at two opposite sides thereof, each of said chambers having an open top, a fastener fixedly mounted on an inner side thereof, and a groove formed on an inner side thereof and arranged under said fastener,    a pair of actuating rods inserted into a respective one of said chambers and provided with a hook and connected with a spring by a pin, said pin being fitted in said groove, an upper end of said spring being connected with said fastener;    a pair of buttons pivotally connected with a top of said cylindrical housing;    a tubular axle fitted within said cylindrical housing and provided with a first set of teeth and a second set of teeth which are positioned together beside each other and operate in opposite circular direction, said first set of teeth being engaged with said hook of a corresponding actuating rod, said second set of teeth being engaged with said hook of said actuating rod;    an axle formed with a spiral groove extending through an outer surface thereof;    a core member fitted within said tubular axle and having a radial hole aligned with said spiral groove;    a pin inserted through said spiral groove so that a lower portion of said pin is fitted into said radial hole of said core member, an end of said core member formed with a hole having a slot adapted to receive a nipple of a cable; and    a cover fixedly mounted on a cylindrical housing to keep dust or the like from entering therein.