Slide Track Assembly

Abstract

A slide track assembly includes an outer track having a first unlocking face, a first stop face, and a second stop face. A middle track is slideably received in the outer track and includes a sliding groove. An inner track is slideably received in the middle track and includes a first unlocking portion, a first stop portion, and a second stop portion. A positioning block is received in the sliding groove and is slideable relative to the middle track in a vertical direction. The positioning block includes first and second stop ends. The positioning block further includes a stop face extending between the first and second stop ends and facing the first lateral wall of the sliding groove. The positioning block can be moved to lock or unlock the inner track, the middle track, and the outer track during extending and retraction of the inner track and the middle track.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a slide track assembly and, more particularly, to a three-part type slide track assembly permitting stable sequential retraction and extension.[0002]A conventional three-part type slide track assembly includes an outer track, a middle track, and an inner track. In an example of a three-part type slide track assembly for a cabinet type server, the outer track is mounted to a frame, the inner track is fixed to a side of the server, and the middle track serves as a loading track and is mounted between the outer track and the inner track, permitting the server to move in a range. Furthermore, the inner track and the middle track can slide relative to the outer track to permit the server to be pulled outwards or pushed inwards.[0003]In a conventional three-part type slide track assembly, the middle track includes a sliding groove receiving a movable cylindrical positioning peg. Each of the outer track and the inner track i...

AI Technical Summary

Benefits of technology

[0005]The primary objective of the present invention is to provide a slide track assembly to permit the middle track and the inner track to be sequentially pulled outwards or to be sequentially pushed inwards in a smooth manner relative to the outer track while enhancing the structural strength and the durability of the slide track assembly as well as permitting easy manufacturing and easy assemblage.

[0009]When the inner track is pulled outwards from the fully retracted position, the first stop portion of the inner track presses against the second stop end of the positioning block to jointly move the middle track and the inner track out of the outer track. When the positioning block contacts the first projection of the outer track, the first unlocking face of the first projection presses against the guiding face of the first stop end of the positioning block to move the positioning block in the sliding groove of the middle track, disengaging the second stop end of the positioning block from the first stop portion of the inner track to thereby unlock the middle track and the inner track, such that the inner track is permitted to be pulled out of the middle track to the fully extended position.

Problems solved by technology

However, the cooperation between the cylindrical positioning peg having the cylindrical sections of different diameters, the sliding grooves, and the locking plates are unstable, and the structural strength is adversely affected.

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