Combination of climbing exerciser and treadmill

Abstract

An exerciser includes a frame and two operation members with two respective endless belts are pivotably connected to two supports on a rear end of the frame. The endless belts reeves through a driving shaft connected between the two supports. Two sets of swing devices are connected to a middle bar of the frame and the two operation members are connected to the two sets of swing devices so as to be alternatively stepped up and down when the exerciser is used as a climbing exerciser. A U-shaped member is connected to the front end of the frame and connects the two operation members as a one-piece. The two operation members are supported on the two supports in the mold of climbing exerciser, and are supported by the driving shaft when in the mold of treadmill.

1 . An exerciser comprising: 
 a frame having a front bar, a middle bar and a rear bar connected between two sides of the frame, two sets of swing devices connected to the middle bar and a driving shaft connected between two supports and driven by a motor, and    two operation members each having a roller connected to a front end thereof and an inner rail and an outer rail, a central member extending from a middle of the rear bar, each operation member having the outer rail pivotably connected to the respective one of the two supports and the inner rail pivotably connected to the central member, two endless belts respectively reeving through the rollers of the two operation members and the driving shaft, the two swing devices respectively connected to two respective undersides of the two operation members.    
     
     
         2 . The exerciser as claimed in  claim 1 , wherein two cylinders are retractably between the two operation members and the two rails of the frame.  
     
     
         3 . The exerciser as claimed in  claim 1 , wherein each of the two supports includes a notch and an axle of the driving shaft is engaged with the two notches.  
     
     
         4 . The exerciser as claimed in  claim 1 , wherein the two supports each have a first hole and the two respective outer rail of the two operation members each have a second hole so that pins extend through the alignment first and second holes.  
     
     
         5 . The exerciser as claimed in  claim 1 , wherein a U-shaped member is pivotably connected to the front bar and a plurality of positioning holes are defined in two extensions of the U-shaped member, two sets of positioning devices are connected to the front bar and each have a pin which is pivotably connected to a lever, the two pins respectively extending through two respective retaining members and one of the positioning holes of the U-shaped member.  
     
     
         6 . The exerciser as claimed in  claim 5 , wherein each extension of the U-shaped member has a pad connected thereon and each operation member includes a ridge on an underside of the front end thereof, each ridge includes at least one inclined surface which is matched with one of the pads when the U-shaped member is pivoted to lift the front end of the two operation members.  
     
     
         7 . The exerciser as claimed in  claim 1 , wherein two front wheels are connected to two respective undersides of front ends of the two sides of the frame and a rear wheel mechanism is connected to the rear bar.  
     
     
         8 . The exerciser as claimed in  claim 7 , wherein the rear wheel mechanism includes a carrier which has one end pivotably connected between two lugs connected to the rear bar by a pin, a rear wheel is connected to the carrier which includes an upper hole and a lower hole, a retaining member is connected between the two lugs and a pin extends through the retaining member and one of the upper hole and the lower hole.  
     
     
         9 . The exerciser as claimed in  claim 8 , wherein the retaining member includes a small hole and a large hole defined in two opposite sides thereof and the pin includes a large end and a small end, the large end is sized to be engaged with both of the upper hole and the lower hole and the large hole, the large end is larger than the small hole, the small end is pivotably connected to a lever which is pivoted to pull the large end of the pin from the large hole of the retaining member and either of the upper hole and lower hole.