Seat for training legs

Abstract

A seat for training legs contains: a frame and a sitting assembly mounted on the frame. A sliding unit is fixed between the frame and the sitting assembly and includes a sliding rack and a sliding block, the sliding rack includes a slidable rail arranged on an upper surface thereof and a fitting tube mounted on two sides of the frame, the sliding block is disposed on a back surface of the sitting assembly and connects with the slidable rail. A vertical moving unit is defined between the frame and a rear end of the sliding rack to drive the rear end of the sliding rack to move obliquely. A foot support is mounted on a front end of the frame to support user's feet. Thereby, the user's feet are placed on the foot support to exert force so that the sitting assembly slides to exercise the user's feet.

What is claimed is: 
     
         1 . A seat for training legs comprising:
 a frame and a sitting assembly mounted on the frame; characterized in that:   a sliding unit is fixed between the frame and the sitting assembly, and the sliding unit includes a sliding rack and a sliding block, the sliding rack includes a slidable rail arranged on an upper surface thereof and a fitting tube mounted on two sides of the frame, the sliding block is disposed on a back surface of the sitting assembly and connects with the slidable rail;   a vertical moving unit is defined between the frame and a rear end of the sliding rack to drive the rear end of the sliding rack to move obliquely;   a foot support is mounted on a front end of the frame to support user's feet.   
     
     
         2 . The seat for training the legs as claimed in  claim 1 , wherein the sliding rack has two limiting portions mounted on two sides thereof, and the sitting assembly also includes two stop columns extending outwardly from the back surface thereof to contact with the two limiting portions, thus limiting a movement of the sitting assembly. 
     
     
         3 . The seat for training the legs as claimed in  claim 1 , wherein the vertical moving unit includes a cylinder and a controller, the cylinder is located below the frame and has a movable shaft extending outwardly from one end thereof and a shifting portion disposed on an end surface of the movable shaft, such that when the shifting portion is pressed, the movable shaft is controlled by the shifting portion to move outwardly or inwardly; the controller is connected with the sliding rack by using a connection shank and has an aperture defined therein to insert the movable shaft, and the controller also has a crank disposed on an upper end thereof, wherein the crank has a protrusion formed on a bottom end thereof to correspond to the aperture; the controller further has a coupling portion extending outwardly from the crank to connect with a first end of a driving cable, and a second end of the driving cable couples with a controlling portion which is fixed outside the frame to be touched by a user. 
     
     
         4 . The seat for training the legs as claimed in  claim 1 , wherein the foot support is expandable and retractable and includes two outer tubes secured between the two supporting tubes, two holding tubes, a first holder, and a second holder; two sides of a first end of the first holder are rotatably connected with the two holding tubes, and a second end of the first holder is rotatably coupled with two fixing bolts, such that the first holder and the second holder are rotatably folded 90 degrees, and the first holder and the two holding tubes are rotatably folded 90 degrees, the two holding tubes are inserted into the two outer tubes so that when the foot support is used, the two holding tubes are expended or retracted. 
     
     
         5 . The seat for training the legs as claimed in  claim 4 , wherein when the foot support is movably adjusted, the stopper is used to position the foot support; wherein the stopper is fixed on one of the two sides of the frame and includes a body disposed on the frame, an affixing pillar inserted through the body and extending to one of the two outer tubes which has the through hole, and a second element; the body has a slope portion defined on an outer edge thereof, and the affixing pillar has a handle extending outwardly from one end thereof, such that the handle is pushed by the second resilient element to abut against the slope portion; one of the two outer tubes has a through hole defined thereon, and each holding tube has plural positioning openings equidistantly arranged thereon to match with the stopper to position the foot support. 
     
     
         6 . The seat for training the legs as claimed in  claim 1 , wherein the brake is mounted on the frame to correspond to the orifice and includes a sleeve fixed on the frame, a fixing post inserting into the sleeve and extending toward the fixing post, and a first resilient element secured in the sleeve and fitting with the fixing post; the sleeve has an oblique face defined on an outer rim thereof, and the fixing post has a grip arranged on an outer end thereof, such that the grip abuts against the oblique face by ways of the first resilient element; when the grip is pulled, it moves outwardly along the oblique face to drive the fixing post to retract inwardly, and when the grip moves to a vertex of the oblique face, the sitting assembly moves; when desiring to stop the movement of the sitting assembly, the grip is pulled to move away from the vertex, the fixing post is pushed by the first resilient element to extend into the orifice, thus stopping the movement of the sitting assembly.