US-20260129782-A1 - SLIDE RAIL DEVICE FOR A SERVER CASE

US20260129782A1US 20260129782 A1US20260129782 A1US 20260129782A1US-20260129782-A1

Abstract

A slide rail device for a server case includes an outer rail unit, a middle rail unit and an inner rail unit. The outer rail unit includes an outer rail having outer first and second ends, and an outer abutting protrusion adjacent to the outer second end. The middle rail unit includes a middle rail slidable along the outer rail, and a detent member pivotably disposed on the middle rail. The detent member is in abutting engagement with the outer abutting protrusion to prevent sliding movement of the middle rail relative to the outer rail. The inner rail unit includes an inner rail slidable along the middle rail, and a releasing member moved to abut and press the detent member, during sliding movement of the inner rail, to make the detent member turn so as to release the detent member from the outer abutting protrusion.

Inventors

Chia-Hung Su
Thin-Wei TSAO
Kuan-Wei Chen

Assignees

FOSITEK CORPORATION

Dates

Publication Date: 20260507
Application Date: 20250106
Priority Date: 20241104

Claims (12)

1 . A slide rail device for connecting with a server case, comprising: an outer rail unit including an outer rail, said outer rail having an outer first end, an outer second end opposite to said outer first end, and at least one outer abutting protrusion disposed adjacent to said outer second end; a middle rail unit including a middle rail which is disposed on and longitudinally slidable along said outer rail, and a detent member which is pivotably disposed on said middle rail, said middle rail having a middle first end adjacent to said outer first end, and a middle second end opposite to said middle first end, said detent member being disposed to be in abutting engagement with said outer abutting protrusion to prevent sliding movement of said middle rail relative to said outer rail; and an inner rail unit including an inner rail which is disposed on and longitudinally slidable along said middle rail for connecting with the server case, and a releasing member which is securely disposed on said inner rail to be moved with said inner rail, wherein, during sliding movement of said inner rail from said middle first end to said middle second end, said releasing member is moved to abut and press said detent member to make said detent member turn so as to release engagement of said detent member from said outer abutting protrusion.
2 . The slide rail device of claim 1 , wherein said middle rail has a middle outer surface facing said outer rail, and a middle inner surface opposite to said middle outer surface and facing said inner rail, said detent member having a pivot portion which is pivotably connected with said middle outer surface and which has a stopped end in abutting engagement with said outer abutting protrusion, and a detent portion which extends from and bends relative to said pivot portion through said middle rail and projects outwardly of said middle inner surface to be pressed by said releasing member and turn upwardly so as to release the engagement of said detent member from said outer abutting protrusion.
3 . The slide rail device of claim 2 , wherein said detent member further has a biasing engaging portion extending from said pivot portion opposite to said stopped end, said middle rail having a first engaging slot, said middle rail unit further including a first biasing member which has an end connected with said biasing engaging portion and is disposed in said first engaging slot.
4 . The slide rail device of claim 2 , wherein said inner rail has an inner rail surface facing said middle rail, said releasing member having a main plate portion which is securely disposed on said inner rail surface, and a releasing portion which extends upwardly from said main plate portion, both of said main plate portion and said releasing portion being disposed to abut and press said detent portion of said detent member to make said detent portion turn upward so as to release engagement of said detent portion from said outer abutting protrusion.
5 . The slide rail device of claim 4 , wherein said middle rail is slidable along said outer rail between a retreating position, where said middle rail overlaps said outer rail, and an extended position, where said middle second end is disposed forwardly of said outer rail, said releasing portion having a releasing edge and a retraction actuating edge, wherein, during sliding movement of said inner rail along said middle rail from said middle first end to said middle second end and when said middle rail is in the retreating position, said releasing edge is moved over and presses said detent portion to release engagement of said detent member from said outer abutting protrusion so as to permit sliding movement of said middle rail from the retreating position to the extended position, and said retraction actuating edge is then disposed forwardly of and in abutting engagement with said detent portion such that said middle rail is synchronously moved with said inner rail in a retreating direction to move said middle rail from the extended position to the retreating position.
6 . The slide rail device of claim 1 , wherein said middle rail unit further includes an anti-retraction member which is pivotably disposed on said middle rail, said middle rail being slidable along said outer rail between a retreating position, where said middle rail overlaps said outer rail and said detent member is in abutting engagement with said outer abutting protrusion, and an extended position, where said middle second end is disposed forwardly of said outer rail, wherein, during the sliding movement of said inner rail to said middle second end, said releasing member is moved to release the engagement of said detent member from said outer abutting protrusion to permit sliding movement of said middle rail to the extended position, and to bring said anti-retraction member in abutting engagement with said outer abutting protrusion so as to keep said middle rail in the extended position.
7 . The slide rail device of claim 6 , wherein said middle rail has a middle outer surface facing said outer rail, and a middle inner surface opposite to said middle outer surface and facing said inner rail, said anti-retraction member having a pivot portion which is pivotably connected with said middle outer surface, an actuated portion which extends from said pivot portion toward said middle first end, and an abutting portion which extends downwardly from said pivot portion and opposite to said actuated portion and which is disposed forwardly of and in abutting engagement with said outer abutting protrusion when said middle rail is moved to the extended position so as to prevent retraction of said middle rail relative to said outer rail.
8 . The slide rail device of claim 7 , wherein said middle rail unit further includes a release operating member which is movably disposed on said middle outer surface, and a release transmitting member which is connected and moved with said release operating member and which is in abutting engagement with said actuated portion of said anti-retraction member such that said release operating member is operable to move said release transmitting member toward said middle first end, which turns said anti-retraction member so as to release engagement of said abutting portion from said outer abutting protrusion.
9 . The slide rail device of claim 8 , wherein said release transmitting member has an abutting slope, said actuated portion of said anti-retraction member having an actuated slope facing said abutting slope such that said abutting slope is moved to abut against and press said actuated slope to make said actuated portion turn downwardly, which turns said abutting portion upwardly.
10 . The slide rail device of claim 7 , wherein said middle rail has a second engaging slot, said middle rail unit further including a second biasing member which has an end connected with said pivot portion of said anti-retraction member and is disposed in said second engaging slot.
11 . The slide rail device of claim 2 , wherein said middle rail unit further includes a middle abutting protrusion which is disposed on said middle rail adjacent to said middle second end and which projects from said middle inner surface, said inner rail unit further including a stop and release operating member which is pivotably disposed on said inner rail to be stopped by and engaged with said middle abutting protrusion when said inner rail slides along said middle rail in an extended direction, wherein said stop and release operating member is operable to be turned to release the abutting engagement thereof from said middle abutting protrusion.
12 . The slide rail device of claim 11 , wherein said stop and release operating member has a pivot portion which is pivotably connected with said inner rail, an operating portion which extends from said pivot portion toward said middle second end and projects forwardly of said inner rail, and a stop portion which extends upwardly from said pivot portion and opposite to said operating portion and which is in abutting engagement with said middle abutting protrusion, wherein said operating portion is operably turned downwardly to make said stop portion turn upward so as to release the abutting engagement of said stop portion from said middle abutting protrusion.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Taiwanese Patent Application No. 113142124, filed on Nov. 4, 2024, and incorporated by reference herein in its entirety. FIELD The disclosure relates to a slide rail device, and more particularly to a slide rail device for connecting with a server case. BACKGROUND A conventional slide rail device includes an outer rail, a middle rail slidably disposed on the outer rail, and an inner rail slidably disposed on the middle rail for connecting with a server case. The inner rail has a length shorter than a half of the length of the middle rail. During the operation of the slide rail device, the user pulls the server case to bring the inner rail to move relative to the middle rail, and then the middle rail is brought to move relative to the outer rail. However, the middle rail might accidentally move and project from the outer rail before the inner rail is moved out of the middle rail, which may cause the user to be scratched by the middle rail during the operation. SUMMARY Therefore, an object of the disclosure is to provide a slide rail device that can alleviate at least one of the drawbacks of the prior art. According to the disclosure, the slide rail device for a server case includes an outer rail unit, a middle rail unit and an inner rail unit. The outer rail unit includes an outer rail. The outer rail has an outer first end, an outer second end opposite to the outer first end, and at least one outer abutting protrusion disposed adjacent to the outer second end. The middle rail unit includes a middle rail which is disposed on and longitudinally slidable along the outer rail, and a detent member which is pivotably disposed on the middle rail. The middle rail has a middle first end adjacent to the outer first end, and a middle second end opposite to the middle first end. The detent member is disposed to be in abutting engagement with the outer abutting protrusion to prevent sliding movement of the middle rail relative to the outer rail. The inner rail unit includes an inner rail which is disposed on and longitudinally slidable along the middle rail for connecting with the server case, and a releasing member which is securely disposed on the inner rail to be moved with the inner rail. During sliding movement of the inner rail from the middle first end to the middle second end, the releasing member is moved to abut and press the detent member to make the detent member turn so as to release engagement of the detent member from the outer abutting protrusion. BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiment with reference to the accompanying drawings. It is noted that various features may not be drawn to scale. FIG. 1 is a perspective view illustrating an embodiment of a slide rail device according to the disclosure. FIG. 2 is an exploded perspective view of the embodiment. FIG. 3 is an exploded perspective view of an outer rail unit of the embodiment. FIG. 4 is a perspective view of a middle rail unit of the embodiment. FIG. 5 is an exploded perspective view of the middle rail unit of the embodiment. FIGS. 6 and 7 are fragmentary, exploded perspective views of the middle rail unit of the embodiment. FIG. 8 is an exploded perspective view of an inner rail unit of the embodiment. FIG. 9 is a perspective view of the embodiment, illustrating a state when an inner rail of the inner rail unit is moved to a middle second end of the middle rail unit. FIG. 10 is a fragmentary rear view of the embodiment, illustrating a state when a detent member is in abutting engagement with an outer abutting protrusion. FIG. 11 is a fragmentary front view of the embodiment, illustrating a state when a releasing member is in abutting engagement with the detent member. FIG. 12 is a fragmentary rear view of the embodiment, illustrating a state similar to FIG. 11. FIG. 13 is a fragmentary front view of the embodiment, illustrating a state when the releasing member presses to turn the detent member. FIG. 14 is a fragmentary rear view of the embodiment, illustrating a state similar to FIG. 13. FIG. 15 is a fragmentary front view of the embodiment, illustrating a state when the inner rail reaches the middle second end, and a releasing portion of the releasing member is in abutting engagement with the detent member. FIG. 16 is a perspective view of the embodiment, illustrating the middle rail moved to an extended position. FIG. 17 is a fragmentary rear view of the embodiment, illustrating a state when the middle rail is in the extended position and an anti-retraction member is in abutting engagement with an outer abutting protrusion. FIG. 18 is a fragmentary rear view of the embodiment, illustrating a state when the middle rail is in the extended position and the anti-retraction member is turned by a release transmitting member. FIG. 19 is a fragmentary front view