Exercise device

Abstract

An exercise device includes a seat plate, a foldable seat support attached to the seat plate and having a pair of legs and a pair of stays pivotally coupled together, a shaft connects the stays together, a pair of spring biasing members attached to the shaft, and a pair of levers attached to the spring biasing members for allowing the levers to be pivoted and moved relative to the shaft and the stays with the spring biasing members, and the levers each include a foot stem for being stepped and actuated by a user. A housing is mounted to the shaft, and the housing includes three panels attached to the shaft and parallel to each other for forming two chambers between the panels and for slidably engaging with the levers and the spring biasing members.

I claim: 
     
         1 . An exercise device comprising:
 a seat plate;   a foldable seat support attached to said seat plate and foldable relative to said seat plate, said seat support including a pair of legs and a pair of stays pivotally coupled together, said stays each including a lower portion;   a shaft connected to said lower portions of said stays for securing said lower portions of said stays together and for allowing said lower portions of said stays to be moved in concert with each other;   a pair of spring biasing members attached to said shaft; and   a pair of levers attached to said spring biasing members respectively for allowing said levers to be pivoted and moved relative to said shaft and said stays with said spring biasing members, and said levers each including a foot stem for being stepped and actuated by a user.   
     
     
         2 . The exercise device as claimed in  claim 1 , wherein said foot stems are perpendicular to said levers respectively. 
     
     
         3 . The exercise device as claimed in  claim 1 , wherein said levers each include a foot pad engaged onto said foot stem respectively. 
     
     
         4 . The exercise device as claimed in  claim 1 , wherein said shaft includes a shank secured to said shaft, and said spring biasing members are attached to said shank of said shaft. 
     
     
         5 . The exercise device as claimed in  claim 4  further comprising a housing mounted to said shaft, and said shank of said shaft is engaged in said housing. 
     
     
         6 . The exercise device as claimed in  claim 5 , wherein said shank includes an extension secured to said housing with a lock member for locking said shank to said housing and for preventing said shank from being pivoted relative to said housing and said shaft. 
     
     
         7 . The exercise device as claimed in  claim 5 , wherein said housing includes three panels attached to said shaft and parallel to each other for forming two chambers between said panels and for slidably receiving and engaging with said lower portions of said levers and said spring biasing members respectively. 
     
     
         8 . The exercise device as claimed in  claim 7 , wherein said levers each include a follower provided on said lower portion of said respective lever and slidably engaged with said panels for guiding and limiting said levers to move relative to said shaft and said stays and said housing, and for preventing said levers from moving sidewise relative to said panels of said housing. 
     
     
         9 . The exercise device as claimed in  claim 1  further comprising a latch device for selectively latching said foot stems and said levers together and for allowing said foot stems and said levers to be moved in concert with each other. 
     
     
         10 . The exercise device as claimed in  claim 9 , wherein said foot stems each include an orifice formed in said respective foot stem for slidably receiving and engaging with said latch device. 
     
     
         11 . The exercise device as claimed in  claim 1  further comprising a pair of spring biasing members coupled between said levers and said seat plate for resisting a movement of said levers relative to said shaft and said stays and said housing and said seat plate. 
     
     
         12 . The exercise device as claimed in  claim 1 , wherein said legs each include an upper portion pivotally mounted to said seat plate with a pivot axle and rotatable relative to said seat plate between an unfolding position and a folding and storing position, said stays each include a middle portion pivotally coupled to an intermediate portion of said legs with a pivot pin for allowing said stays to be rotated relative to said legs between a working and unfolding position and a folded storing position, and said stays each include an upper portion attached to said seat plate. 
     
     
         13 . The exercise device as claimed in  claim 12 , wherein said seat plate includes two rails attached to a bottom portion of said seat plate, and said upper portions of said stays are slidably engaged with said rails of said seat plate. 
     
     
         14 . The exercise device as claimed in  claim 1  further comprising a pair of resilient cables connected to said legs respectively. 
     
     
         15 . The exercise device as claimed in  claim 14 , wherein said cables each include a hand grip for being grasped by a user.