Sliding mechanism

Abstract

A sliding mechanism used in a portable electronic device is described. The sliding mechanism includes a fixed piece, a sliding piece and a friction reducing assembly. The fixed piece includes a main body and two sliding rails disposed at two opposite edges of the main body. The sliding piece is slidably assembled with the fixed piece and includes a base and two guiding rails disposed at two opposite edges of the base. The friction reducing assembly disposed between and in rolling contact with the sliding rails and the guiding rails.

1 . A sliding mechanism, comprising:
 a fixed piece comprising a main body and two sliding rails disposed at two opposite edges of the main body;   a sliding piece slidably assembled with the fixed piece, the sliding piece comprising a base and two guiding rails disposed at two opposite edges of the base and corresponding to the two sliding rails respectively; wherein, the two guiding rails of the sliding piece are slidably assembled with the corresponding two sliding rails of the fixed piece respectively; and   a friction reducing assembly disposed between and in rolling contact with the sliding rails and the guiding rails.   
   
   
       2 . The sliding mechanism as claimed in  claim 1 , wherein the two sliding rails each include a groove recessed in a corresponding inner surface and extends longitudinally along the inner surface; the two guiding rails each include a guiding groove recessed in a corresponding outer surface and extends longitudinally along the outer surface. 
   
   
       3 . The sliding mechanism as claimed in  claim 2 , wherein the friction reducing assembly includes two backstops and a plurality of balls partially assembled within the backstop, the two sliding rails and the two guiding rails form two assembling portions there-between, the two backstops are assembled within the two assembling portions respectively. 
   
   
       4 . The sliding mechanism as claimed in  claim 3 , wherein the backstop includes a main portion with a plurality of through holes spaced defined therethrough along the longitudinal direction; the plurality of balls assembled within the corresponding holes and partially accommodated within the corresponding sliding rail of the fixed piece. 
   
   
       5 . The sliding mechanism as claimed in  claim 4 , wherein the back stop further includes a bent portion extending and bent from a longitudinal edge of the main portion, the bent portion projects out of the corresponding sliding rail; the other longitudinal edge of the main portion opposite to the bent portion defines a plurality of gaps communicating with a corresponding through holes respectively. 
   
   
       6 . The sliding mechanism as claimed in  claim 5 , wherein the backstop further includes a plurality of tabs extending outwardly from two opposite sides of the main portion; each through hole surrounded by several spaced apart tabs; the balls loosely fit in the through holes and prevented from dropping off the backstop by the tabs. 
   
   
       7 . The sliding mechanism as claimed in  claim 2 , wherein the two sliding rails and the main body together form an assembling space there between, the sliding piece and the friction reducing assembly assembled and accommodated therein. 
   
   
       8 . The sliding mechanism as claimed in  claim 2 , wherein the main body has a U-shaped cross-section and includes a main board and two assembling walls disposed at two opposite edges of the main board parallel to each other; the two sliding rails are formed by extrusion, and are welded to corresponding assembling walls. 
   
   
       9 . The sliding mechanism as claimed in  claim 8 , wherein the sliding piece has a U-shaped cross-section, the two guiding rails are parallel to each other and are formed by extrusion, and are welded to the corresponding two opposite edges of the base. 
   
   
       10 . The sliding mechanism as claimed in  claim 2 , wherein the fixed piece and the sliding piece are produce by one-mold molding method. 
   
   
       11 . A sliding mechanism, comprising:
 a fixed piece comprising a main body and two sliding rails disposed at two opposite edges of the main body, the two sliding rails and the main body form an assembling space there between;   a sliding piece slidably assembled with the fixed piece and accommodated within the assembling space, the sliding piece comprising a base and two guiding rails disposed at the two opposite edges of the base corresponding to the two sliding rails respectively; wherein, the two guiding rails of the sliding piece are assembled with the corresponding two sliding rails of the fixed piece respectively; and   a friction reducing assembly disposed between and in rolling contact with the sliding rails and the guiding rails.   
   
   
       12 . The sliding mechanism as claimed in  claim 11 , wherein the sliding rails and the guiding rails are formed by extrusion. 
   
   
       13 . The sliding mechanism as claimed in  claim 11 , wherein the friction reducing assembly includes two backstops and a plurality of balls, each backstop includes a main portion with a plurality of spaced apart holes defined therethrough along the longitudinal direction; the plurality of balls assembled within the corresponding holes and partially accommodated within the corresponding sliding rail of the fixed piece and the guiding rail of the sliding piece. 
   
   
       14 . The sliding mechanism as claimed in  claim 13 , wherein one longitudinal edge of the main portion defines a plurality of gaps communicating with a corresponding through holes respectively. 
   
   
       15 . The sliding mechanism as claimed in  claim 14 , wherein the backstop further includes a plurality of tabs extending outwardly from two opposite sides of the main portion; each through hole is surrounded by several spaced apart tabs; the balls loosely fit in the through holes and are prevented from dropping off the backstop by the tabs.