Slide rail assembly

Abstract

A slide rail apparatus includes an outer rail, an intermediate rail, an inner rail, a latch member slidably mounted to the intermediate rail, and a resilient member. The latch member includes a first abutting post and a second abutting post. When the supporting member supports the first abutting post to keep the latch member at a locking position, the second abutting post of the latch member abuts a stop portion of the intermediate rail, to slide the intermediate rail and the inner rail forward synchronously. When the latch member slides forward to be received in a positioning notch of the outer rail, the resilient member restores to slide the latch member to an unlocking position, where the second abutting post of the latch member disengages from the stop portion, to enable the inner rail to slide out of the intermediate rail.

1 . A slide rail assembly comprising:
 an outer rail comprising an elongated rail body forming a holding portion, and a support bar fixed to the rail body and extending along a longitudinal axis of the rail body, the holding portion being adjacent to a front end of the support bar;   an intermediate rail slidably coupled to the outer rail;   an inner rail slidably coupled to the intermediate rail, and forming a stop portion; and   a latch member comprising a first abutting post extending towards the outer rail, and a second abutting post extending towards the inner rail, the latch member slidably mounted to the intermediate rail between a locking position, where the second abutting post of the latch member abuts the stop portion of the inner rail to enable the intermediate rail to slide forward in synchronization with the inner rail, and an unlocking position, where the first abutting post of the latch member is engaged with the holding portion in response to the first abutting post sliding forward away from the support bar, and the second abutting post of the latch member disengages from the stop portion of the inner rail to enable the inner rail slide forward relative to the intermediate rail; and   a resilient member mounted to the intermediate rail and engaging with the latch member;   wherein the latch member is kept to the locking position in response to the first abutting post of the latch member being supported on the support bar of the outer rail; the latch member is urged to slide to the unlocking position by the resilient member, in response to the first abutting post sliding forward and away from the support bar to be engaged with the holding portion of the outer rail.   
     
     
         2 . The slide rail assembly of  claim 1 , wherein the latch member comprises a substantially disc-shaped main body between the first and second abutting posts, a first mounting groove is defined in a circumferential surface of the first abutting post, the intermediate rail defines a slide slot extending perpendicular to a longwise direction of the intermediate rail, opposite sides bounding the slide slot are slidably engaged in the first mounting groove. 
     
     
         3 . The slide rail assembly of  claim 2 , wherein a second mounting groove is defined in a circumferential surface of the second abutting post, the resilient member comprises a first resilient arm, and a second resilient arm fixed to the intermediate rail, the first resilient arm comprises a coupling portion engaged in the second mounting groove, and is restorably movable relative to the second resilient arm. 
     
     
         4 . The slide rail assembly of  claim 2 , wherein the inner rail further comprises a releasing portion to engage with the second abutting post of the latch member and slide the latch member along the slide slot towards the locking position in response to the inner rail sliding rearwards relative to the intermediate rail. 
     
     
         5 . The slide rail assembly of  claim 4 , wherein the releasing portion of the inner rail is arranged in front of the stop portion of the inner rail, and forms a cam surface facing the stop portion. 
     
     
         6 . The slide rail assembly of  claim 1 , wherein the holding portion comprises a first abutting block and a second abutting block, and defines a positioning notch therein between the first abutting block and the second abutting block, the first abutting post of the latch member is received in the positioning notch in response to the latch member being at the unlocking position. 
     
     
         7 . The slide rail assembly of  claim 6 , wherein the first abutting block abuts a front end of the support bar, and is flush with a top of the support bar. 
     
     
         8 . The slide rail assembly of  claim 7 , wherein the intermediate rail comprises a protrusion, the protrusion abuts the second abutting block of the holding portion of the outer rail to prevent the intermediate rail from sliding relative to the outer rail, when the first abutting post of the latch member slides over the support bar and the first abutting block is to be received in the positioning notch.