Stepless height adjusting apparatus

Abstract

A stepless height adjusting apparatus includes a slider, a slide way, and an elastic supporting device. The slider is an axial symmetry bar. The axial symmetry bar has a larger cross section perpendicular to the axis thereof on the top portion and a smaller cross section perpendicular to the axis thereof on the bottom portion so as to form an incline on the side surface. The slider couples to the slide way to move on the slide way. The elastic supporting device is disposed on the top portion of the slide way to support the slider with balance forces between the elastic supporting device and the incline of the slider. When an external force is pushing the slider, the slider may move along the slide way. When the external force is removed, the slider may stop at a determined position on the slide way by the balance force.

1 . A stepless height adjusting apparatus, comprising: 
 a slider having an axially symmetric bar, a cross section of the axially symmetric bar in a top portion being greater than a cross section of the axially symmetric bar in a bottom portion to form an incline on a side surface of the slider, and the cross sections being perpendicular to an axis of the slider; a slide way coupling to the slider for the slider to move along the slide way; and    an elastic supporting device, disposed on one end of the slide way so that a balanced force between the elastic supporting device and the incline of the slider supports the slider; 
 wherein the slider moves along the slide way under an external force and, once the external force is removed, the slider stops at a determined position due to the balanced forces between the elastic supporting device and the incline of the slider.  
   
   
   
       2 . The stepless height adjusting apparatus of  claim 1 , wherein the elastic supporting device comprises: 
 at least one fixing base disposed on a side of the slide way and the fixing base comprising a pivotal point and an angle adjusting groove; and    at least one supporting frame coupled to the pivotal point by one end of the supporting frame and wiggled about the pivotal point, the supporting frame comprising: 
 a pushing rod disposed on one end of the supporting frame;  
 a spring coupled between the pushing rod and the supporting frame to provide the pushing rod with a predetermined elastic force for the pushing rod supporting the slider; and  
 a fixing device disposed on the other end of the supporting frame and coupled to the angle adjusting groove, wherein an angle between the elastic supporting device and the slider is determined by the coupling position of the fixing device and the angle adjusting groove, thereby adjusting component forces of the pushing rod in the direction along the incline of the slider and the horizontal direction.  
   
   
   
       3 . The stepless height adjusting apparatus of  claim 2 , wherein the pushing rod comprises a roller disposed at the end of the pushing rod for the slider and the pushing rod to slide smoothly.  
   
   
       4 . The stepless height adjusting apparatus of  claim 1 , wherein the slide way comprises a sliding sleeve between the slide way and the slider for the slider to slide smoothly.  
   
   
       5 . The stepless height adjusting apparatus of  claim 1 , wherein the slider comprises a device coupling base disposed on the slider to couple to a device thereby adjusting the height of the device by the stepless height adjusting apparatus.  
   
   
       6 . The stepless height adjusting apparatus of  claim 1 , wherein the incline is a curved surface.  
   
   
       7 . The stepless height adjusting apparatus of  claim 1 , further comprising a base coupled to the bottom of the slide way to increase a stability of the stepless height adjusting apparatus.  
   
   
       8 . A stepless height adjusting apparatus, comprising: 
 a slider having an axially symmetric bar, a cross section of the axially symmetric bar in a top portion being greater than a cross section of axially symmetric bar in a bottom portion to form an incline on the side surface of the slider, and the cross sections being perpendicular to an axis of the slider;    a slide way coupling to the slider to move on the slide way; and    an elastic supporting device, disposed on one end of the slide way so that a balanced force between the elastic supporting device and the slider supports the slider and the elastic supporting device comprising: 
 at least one fixing base disposed on a side of the slide way and including a pivotal point and an angle adjusting groove; and  
 at least one supporting frame coupled to the pivotal point by the one end of the supporting frame and wiggled about the pivotal point, the supporting frame comprising: 
 a pushing rod disposed on one end of the supporting frame;  
 a spring coupled between the pushing rod and the supporting frame to provide the pushing rod with a predetermined elastic force for the pushing rod to support the slider; and  
 a fixing device disposed on the other end of the supporting frame and coupled to the angle adjusting groove, wherein an angle between the elastic supporting device and the slider is determined by the coupling position of the fixing device and the angle adjusting groove, thereby adjusting the component forces of the pushing rod in the direction along the incline of the slider and the horizontal direction;  
 
  wherein the slider moves along the slide way under an external force, once the external force is removed, the slider stops at a determined position due to the balanced forces between the elastic supporting device and the incline of the slider.  
   
   
   
       9 . The stepless height adjusting apparatus of  claim 8 , wherein the pushing rod comprises a roller disposed at one end of the pushing rod for the slider and the pushing rod to slide smoothly.  
   
   
       10 . The stepless height adjusting apparatus of  claim 8 , wherein the slide way comprises a sliding sleeve between the slide way and the slider for the slider to slide smoothly.  
   
   
       11 . The stepless height adjusting apparatus of  claim 8 , wherein the slider comprises a coupling base disposed on the slider to couple to a device, thereby adjusting the height of the device by the stepless height adjusting apparatus.  
   
   
       12 . The stepless height adjusting apparatus of  claim 8 , wherein the incline is a curved surface.  
   
   
       13 . The stepless height adjusting apparatus of  claim 8 , further comprising a base coupled to the bottom of the slide way to increase a stability of the step-less height adjusting apparatus.