Supporting rack with adjustable torsion

Abstract

A supporting rack for supporting an electronic device includes a main body, a rotating arm, a fastening member and a position portion. The main body includes a connecting portion and a plurality of holding members. The connecting portion is connected with the electronic device, the holding members are disposed on the connecting portion, and each of which includes a first surface and a second surface opposite thereto. A gap is formed between adjacent holding members. The rotating arm, held by the holding members, tightly contacts the first surface. The fastening member connects with the holding members between a first position and a second position. The position portion is disposed on the holding member. When the fastening member is connected with the holding members at the first position, an interference, formed between the fastening members and the second surface, is increased as the fastening member is moved toward the second position.

1 . A supporting rack with adjustable torsion for supporting an electronic device, comprising:
 a main body comprising a connecting portion and a plurality of holding members, wherein the connecting portion is connected with the electronic device, the holding members are disposed on the connecting portion, each of the holding members comprises a first surface and a second surface opposite to the first surface, and a gap is formed between adjacent holding members;   a rotating arm held by the holding members and tightly contacting the first surface;   a fastening member connected with the holding members between a first position and a second position; and   a position portion disposed on the holding members,   wherein when the fastening member is connected with the holding members at the first position, an interference is formed between the fastening members and the second surface, and the interference is increased as the fastening member is moved toward the second position.   
     
     
         2 . The supporting rack as claimed in  claim 1 , wherein the fastening member has a notch engaging with the position portion. 
     
     
         3 . The supporting rack as claimed in  claim 2 , wherein the position portion comprises a plurality of position protrusions disposed on one of the holding members. 
     
     
         4 . The supporting rack as claimed in  claim 3 , wherein the position protrusions are made of flexible material. 
     
     
         5 . The supporting rack as claimed in  claim 3 , wherein the fastening member has a notch engaging with the position portion. 
     
     
         6 . The supporting rack as claimed in  claim 5 , wherein the position portion comprises a plurality of position protrusions engaging with the notch. 
     
     
         7 . The supporting rack as claimed in  claim 6 , wherein the position protrusions are made of flexible material. 
     
     
         8 . The supporting rack as claimed in  claim 1 , wherein the fastening members have an inner surface comprising a thread, the second surface of the holding member comprises a thread, and the fastening member is able to be screwed to the holding members. 
     
     
         9 . The supporting rack as claimed in  claim 1 , wherein the rotating arm comprises a rotating bar and a spherical body connected with the rotating bar and held in the holding members, and an outer surface of the spherical body contacts the first surface of the holding members.