Supporting rack

Abstract

A supporting rack may include a supporting surface, a base, a side supporting member, a center supporting member and a position adjusting unit. In one embodiment, the side supporting member has two side supporting arms, and an upper end of each side supporting arm is pivotally connected with an upper locking unit on one side of the supporting surface and a lower end thereof is pivotally connected to a corresponding side of the base. More specifically, the lower end of each side supporting arm is also connected to a lower locking unit on the base, which is configured to provide not only a stronger support for the supporting surface, but also lock the lower end of the side supporting arms. Similarly, each side supporting arm can be locked through the upper locking unit at a predetermined position according to the user's preference.

What is claimed is: 
     
         1 . A supporting rack comprising a supporting surface, a base, a side supporting member having two side supporting arms, a center supporting member and a position adjusting unit, wherein an upper end of each side supporting arm is pivotally connected with an upper locking unit on one side of the supporting surface and a lower end thereof is pivotally connected to a corresponding lower locking unit on one side of the base, and a height of the supporting rack is determined by an angel between the side supporting arm and the base. 
     
     
         2 . The supporting rack of  claim 1 , wherein the position adjusting unit is mechanically engaged with the upper and lower locking units and when the position adjusting unit is pressed, the position adjusting unit disengages with the upper and lower locking units so the height of the supporting rack can be adjusted until the user release the position adjusting unit to engage with the upper and lower locking units again.