Folding and inclination adjustable device for treadmills

Abstract

A treadmill includes a base and two posts are connected to the two side rails. A frame with an endless belt is pivotably connected between the two posts. Each post has an elongate hole and two sets of pivot assemblies respectively extend through the two elongate holes. Each pivot assembly has a pin and a roller which is mounted to the pin which is fixed to the frame. The roller is movably retained in the elongate hole corresponding thereto. A support device has an end fixed to the base and the other end of the support device is pivotably connected to an underside of the frame. The frame is pivoted upward about the pins and the rollers assist the pivotal movement of the frame. The pins are moved within the elongate holes to adjust the inclination of the frame relative to the base.

1 . A treadmill comprising: 
 a base ( 10 ) with two side rails ( 11 ) and two posts ( 12 ) connected to the side rails ( 11 ), each post ( 12 ) having an elongate hole ( 15 ) defined therethrough;    a frame ( 20 ) having a first end pivotably connected between the two posts ( 12 ) and an endless belt ( 21 ) reeving through the first end and a second end of the frame ( 20 ), a driving unit ( 23 ) connected to the first end of the frame ( 20 ) and driving the endless belt ( 21 );    two sets of pivot assemblies ( 25 ) respectively extending through the two elongate holes ( 15 ) and each having a pin ( 253 ) and a roller ( 254 ) which is mounted to the pin ( 253 ), the roller ( 254 ) movably retained in the elongate hole ( 15 ) corresponding thereto, the pin ( 253 ) being fixed to the frame ( 20 ), and    a support device ( 30 ) having an end fixed to the base ( 10 ) and the other end of the support device ( 30 ) pivotably connected to an underside of the frame ( 20 ).    
   
   
       2 . The treadmill as claimed in  claim 1 , wherein a wheel ( 26 ) is connected to the front end of the frame ( 20 ).  
   
   
       3 . The treadmill as claimed in  claim 1 , wherein an angle is defined between a longitudinal axis of each elongate hole ( 15 ) and the frame ( 20 ), the angle is equal to or less than 90 degrees.  
   
   
       4 . The treadmill as claimed in  claim 1 , wherein each of the pins ( 253 ) includes a threaded end ( 252 ) which is threadedly connected to the frame ( 20 ).  
   
   
       5 . The treadmill as claimed in  claim 1 , wherein each of the posts ( 12 ) includes an adjusting portion which includes a first section ( 111 ) fixed on respective one of the two side rails ( 11 ) and including a first elongate hole ( 151 ), a movable section ( 121 ) movably mounted to the first section ( 11 ) and a second section ( 120 ) which is connected to the movable section ( 121 ), the movable section ( 121 ) having a second elongate hole ( 152 ), the two pins ( 253 ) of the two sets of pivot assemblies ( 25 ) respectively extending through aligned first and second elongate holes ( 151 ,  152 ).