Sliding rail assembly

Abstract

A sliding rail assembly includes an outer rail, a middle rail, and an inner rail that are matched with one another, and a self-locking device matched with the inner rail. The self-locking device includes a fixed block and a sliding block moving with respect to the fixed block, a sliding slot provided for the sliding block to slide is disposed on the fixed block, and a sliding block limiting slot is disposed on the sliding block. A spring extends in the sliding slot, and has one end connected to the bottom of the sliding block, and the other end fastened to the fixed block. A clamping portion and a limiting slot are disposed on the fixed block to match with a sliding block clamping portion- and a sliding block limiting portion disposed on the sliding block.

What is claimed is: 
     
         1 . A sliding rail assembly, comprising an outer rail, a middle rail, and an inner rail that are matched with one another, and a self-locking device matched with the inner rail, wherein: the self-locking device comprises a fixed block and a sliding block moving relative to the fixed block, a sliding slot provided for the sliding block to slide is disposed on the fixed block, and a sliding block limiting slot is disposed on the sliding block; a spring extends in the sliding slot, and has one end connected to the bottom of the sliding block and the other end fastened on the fixed block; a clamping portion and a limiting slot are disposed on the fixed block, so as to match with a sliding block clamping portion and a sliding block limiting portion disposed on the sliding block; and a buffer is further disposed at the front end of the fixed block. 
     
     
         2 . The sliding rail assembly according to  claim 1 , wherein the clamping portion on the fixed block comprises a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion are protruded on the surface of the fixed block, and has a distance there-between slightly greater than the width of the sliding block clamping portion  52 . 
     
     
         3 . The sliding rail assembly according to  claim 1 , wherein the fixed block is fixed to a mounting groove through clamping by mounting limiting blocks at two symmetric portions. 
     
     
         4 . The sliding rail assembly according to  claim 1 , wherein a clamping block matched with the sliding block is disposed on the inner rail, and the clamping block is fixed to the inner rail through a clamping block riveting hole. 
     
     
         5 . The sliding rail assembly according to  claim 1 , wherein the spring is fixed in a fixed seat through engaging with a spring engagement slot. 
     
     
         6 . The sliding rail assembly according to  claim 1 , wherein a sliding guide slot provided
 slot provided with a slope is disposed between the limiting slot of the fixed block and the first clamping portion.   
     
     
         7 . The sliding rail assembly according to  claim 1 , wherein the outer rail and middle rail, and the middle rail and inner rail are respectively connected in a sliding manner through balls disposed in an outer ball slot and an inner ball slot. 
     
     
         8 . The sliding rail assembly according to  claim 1 , wherein two springs are disposed in parallel.