CN106136635B - Sliding rail assembly - Google Patents

Abstract

The present invention relates to a slide rail assembly, comprising a first rail, a second rail, a bracket and a support seat. The first rail defines a first channel along a first direction. The second rail is movably connected to the first rail and can be movably displaced relative to the first rail in the first channel. The bracket is connected to one end of the first rail. The support seat is movably mounted on the bracket and can be movably displaced relative to the bracket along the first direction. The support seat comprises a first support portion defining a support channel corresponding to the first channel, and the support seat is configured to allow the second rail to be displaced into the support channel.

Description

Slide rail assembly

technical field

The present invention relates to a slide rail assembly, in particular to a slide rail assembly having a support seat capable of supporting one rail of the slide rail assembly when the slide rail assembly is pulled out.

Background technique

A conventional slide rail assembly includes a first rail, a second rail, and a third rail movably connected with the second rail, so that the slide rail assembly can be extended or retracted. Both ends of the first rail can be attached to a rack for supporting the slide rail assembly. The second rail is movably connected between the first rail and the third rail, and when the third rail is pulled out, the second rail is used to support the third rail. The third rail can carry a device, such as a chassis, such that the slide rail assembly allows the device to be received in or pulled out from the rack.

However, in the known art, when the second rail and the third rail are pulled out, usually only a small part of the second rail is supported by the first rail, and other parts of the second rail are suspended Not supported. Therefore, when the cabinet is fully pulled out from the rack, the slide rail assembly conventionally configured in this way may not be able to stably support the cabinet.

Contents of the invention

The object of the present invention is to provide a slide rail assembly, which includes a support base that is movably installed on the bracket to support the slide rail that is pulled out. When the cabinet is pulled out from the rack, it can carry the cabinet and be more stable.

The slide rail assembly according to one aspect of the present invention includes a first rail, a second rail, a bracket and a support base, and is characterized in that: the first rail defines a first passage along a first direction ; the second rail is movably connected to the first rail; the bracket is connected to one end of the first rail; Displacement in one direction, the support base includes a first support portion to define a support passage corresponding to the first passage, and the support base is configured to allow the second rail to be displaced into the support passage.

Wherein, the first rail includes two first side walls, and a first side wall is connected between the two first side walls, and the two first side walls and the first side wall jointly define the first side wall A passage, the second rail is movably displaced relative to the first passage of the first rail, the second rail includes two second side walls, and a second side wall is connected between the two second side walls Between, the two second side walls and the second side wall jointly define a second channel, and the slide rail assembly further includes a third rail movably connected to the second rail and opposite to the second rail of the second rail Channels are movably displaced.

Wherein, the first supporting portion includes two supporting side walls, and a supporting side wall is connected between the two supporting side walls, and the two supporting side walls correspond to the two second sides of the second rail respectively. wall, and the supporting side wall corresponds to the second side wall of the second rail.

Wherein, the bracket includes two third side walls, and a third side wall is connected between the two third side walls, and the two third side walls and the third side wall jointly define a third The channel, the third channel is along the first direction, and the support base further includes a second support portion movably connected to the bracket and movable relative to the third channel of the bracket.

Wherein, the first rail and the bracket are integrally formed.

Wherein, the first rail and the bracket are installed on different planes, the bracket is along a second direction, and the second direction is perpendicular to the first direction.

A slide rail assembly according to another aspect of the present invention includes a first rail, a second rail, a bracket, and a support base, and is characterized in that: the first rail includes two first side walls, and a first side wall connected between the two first side walls, the two first side walls and the first side wall jointly define a first channel, and the first channel is along a first direction; The second rail is movably connected to the first rail; the bracket is connected to one end of the first rail; and the support base is movably mounted on the bracket and can move relative to the bracket along the first direction Displacement, the support seat includes a first support portion to define a support channel corresponding to the first channel; wherein, when the second rail is relatively displaced in the first channel of the first rail, a part of the second rail is displaced Entering into the supporting channel, the part of the second rail is supported by the first supporting portion of the supporting base.

Wherein, the second rail includes two second side walls, and a second side wall is connected between the two second side walls, and the two second side walls and the second side wall jointly define a first Two passages are along the first direction, and the slide rail assembly further includes a third rail movably connected to the second rail and movable relative to the second passage of the second rail.

Wherein, the first supporting portion includes two supporting side walls, and a supporting side wall is connected between the two supporting side walls, and the two supporting side walls correspond to the two second sides of the second rail respectively. wall, and the supporting side wall corresponds to the second side wall of the second rail.

Wherein, the bracket includes two third side walls, and a third side wall is connected between the two third side walls, and the two third side walls and the third side wall jointly define a third The channel, the third channel is along the first direction, and the support seat further includes a second supporting portion movably connected to the bracket and movable relative to the third channel of the bracket.

Wherein, the support seat further includes at least one contact portion mounted on the first support portion, when a part of the second rail is displaced into the support channel, the part of the second rail contacts the contact portion to drive The displacement of the supporting seat relative to the first bracket is along the first direction.

Wherein, the first rail and the bracket are integrally formed.

Wherein, the first rail and the bracket are installed on different planes along a second direction, and the second direction is perpendicular to the first direction.

According to another aspect of the present invention, a slide rail assembly is assembled to install a cabinet to a frame, and the slide rail assembly includes a first rail, a first bracket, a second bracket, a support seat, A second rail and a third rail, characterized in that: the first rail includes two first side walls, and a first side wall is connected between the two first side walls, and the two first side walls The side wall and the first side wall jointly define a first passage along a first direction; the first bracket connects the first end of the first rail and is assembled and attached to the frame a first column; the second bracket is connected to the second end of the first rail, and a second column attached to the frame is set; the support seat is movably installed on the first bracket and Relative to the first bracket movable along the first direction, the support seat includes a first support portion to define a support channel corresponding to the first channel; the second rail is movably connected to the first rail, The second rail includes two second side walls, and a second side wall is connected between the two second side walls, and the two second side walls and the second side wall jointly define a second channel along the along the first direction; and the third rail is movably connected to the second rail on which the cabinet is mounted; wherein, when the second rail is relatively displaced in the first channel of the first rail A part of the second rail is displaced into the support channel, and the part of the second rail is supported by the first support portion of the support base.

Description of drawings

To further illustrate and confirm the above-mentioned purpose, structural features and effects of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic view showing the assembly of a slide rail assembly according to an embodiment of the present invention.

FIG. 2 shows an exploded view of a slide rail assembly according to an embodiment of the present invention.

FIG. 3 is a schematic view showing the installation of a slide rail assembly to a rack in an embodiment of the present invention.

FIG. 4 shows a schematic diagram of a position of the support seat on the first bracket according to an embodiment of the present invention.

FIG. 5 shows a schematic view of another position of the support seat on the first bracket according to an embodiment of the present invention.

Fig. 6 shows a schematic cross-sectional view along section 1-1 in Fig. 1 .

FIG. 7 shows a schematic diagram of the configuration of the cable management device when the cabinet is received in the rack.

FIG. 8 shows a schematic diagram of one end of a cable management arm of the cable management device at a position of the slide rail assembly.

FIG. 9 is a schematic view showing that the end of a cable management arm of the cable management device is located at another position of the slide rail assembly.

FIG. 10 is a schematic diagram showing that the first connecting seat includes an elastic arm for locking on the second rail.

FIG. 11 shows an exploded view of the first connecting seat and the elastic arm.

FIG. 12 shows a schematic cross-sectional view of the elastic arm for locking on the second rail.

FIG. 13 shows a schematic cross-sectional view of the elastic arm released from the second rail.

Detailed ways

FIG. 1 is a schematic view showing the assembly of a slide rail assembly according to an embodiment of the present invention. FIG. 2 shows an exploded view of a slide rail assembly according to an embodiment of the present invention. The slide rail assembly 10 of the present invention includes a first rail 20 , a second rail 30 and a third rail 40 . The first rail 20 includes two first side walls 22 and a first side wall 24 connected between the two first side walls 22 . The two first side walls 22 and the first side wall 24 jointly define a first passage along a first direction X (the direction is a longitudinal direction of the slide rail assembly). The second rail 30 is movably connected to the first rail 20 and is movably displaced relative to the first channel of the first rail 20 . The second rail 30 includes two second side walls 32 and a second side wall 34 connected between the two second side walls 32 . The two second sidewalls 32 and the second sidewall 34 jointly define a second channel along the first direction X. The third rail 40 is movably connected to the second rail 30 and is movably displaced relative to the second channel of the second rail 30 .

The slide rail assembly 10 of the present invention further includes a first bracket 50 , a second bracket 60 and a support base 70 . The first bracket 50 is connected to the first end of the first rail 20, and the first bracket 50 includes two third side walls 52 and a third side wall 54 connected to the two third side walls 52 between. The two third sidewalls 52 and the third sidewall 54 jointly define a third channel, and the third channel is along the first direction X. The second bracket 60 is connected to the second end of the first rail 20 . The supporting base 70 includes a first supporting portion 72 and a second supporting portion 74 . The first supporting portion 72 includes two supporting side walls 76 and a supporting side wall 78 connected between the two supporting side walls 76 . The two supporting side walls 76 respectively correspond to the two second side walls 32 of the second rail 30 , and the supporting side walls 78 correspond to the second side walls 34 of the second rail 30 . The two supporting sidewalls 76 and the supporting sidewall 78 jointly define a supporting channel, and the supporting channel is along the first direction X. In particular, the supporting channel corresponds to the first channel, and is configured so that the second rail 30 can be displaced into the supporting channel. The second support portion 74 is movably connected to the first bracket 50 and relative to the third channel of the first bracket 50 is movably displaced along the first direction X. As shown in FIG.

In the foregoing embodiments, the first rail 20 and the first bracket 50 can be formed integrally, and the first rail 20 and the first bracket 50 are installed on different planes, that is, the The first bracket 50 is along a second direction Y, wherein the second direction Y is perpendicular to the first direction X. According to the above configuration, the first rail 20 and the first bracket 50 correspond to the shape of the cabinet 90 , as shown in FIG. 3 . However, the present invention is not limited by the above embodiments, and the first rail 20 and the first bracket 50 can also be formed separately.

Referring to FIG. 3 , FIG. 3 shows a schematic diagram of the installation of a slide rail assembly from a cabinet to a rack according to an embodiment of the present invention. The first bracket 50 is assembled with a first column 102 attached to the frame, and the second bracket 60 is assembled with a second column 104 attached to the frame, so that the slide rail assembly 10 can be installed in the rack. Moreover, a cabinet 90 can be installed on the third rail 40, so that the slide rail assembly 10 can allow the cabinet 90 to be received or pulled out from the rack. The cabinet 90 includes a first portion 92 and a second portion 94 . The width of the first portion 92 is larger than that of the second portion 94 , and one side of the second portion 94 is mounted on the third rail 40 .

According to the above configuration, when the cabinet 90 is pulled out from the rack, the second rail 30 is relatively displaced in the first channel of the first rail 20, and a part of the second rail 30 is displaced into the In the supporting channel, the part of the second rail 30 is supported by the first supporting portion 72 of the supporting base 70 . As shown in Figures 4 and 5, when the second rail 30 is pulled out, the support base 70 can be displaced between a position A and a position B of the first bracket 50 to support the second rail 30. Therefore, the second rail 30 can be supported by the first rail 20 and the support base 70, when the cabinet 90 is pulled out from the rack, the slide rail assembly 10 can carry the cabinet 90 more Stablize.

Referring to FIG. 6 , FIG. 6 shows a schematic cross-sectional view along line 1 - 1 in FIG. 1 , the support base 70 further includes at least one contact portion 73 mounted on the first support portion 72 . When the part of the second rail 30 is displaced into the support channel, the part of the second rail 30 contacts the contact portion 73 to drive the supporting base 70 to move relative to the first bracket 50 along the first bracket 50 . One direction X. Therefore, when the cabinet 90 is pulled out from the rack, the support base 70 can be moved to an outer position by the second rail 30 to provide better support. In other embodiments of the present invention, the support base 70 may not include the contact portion 73, that is, when the cabinet 90 is pulled out from the rack, the support base 70 is not held by the second rail. 30 drives. The supporting seat 70 can also be operated and displaced manually.

On the other hand, as shown in FIGS. 1 and 2 , the slide rail assembly 10 of the present invention further includes a first connecting seat 82 and a second connecting seat 84 . The first connecting seat 82 is movably connected to the first rail 20 and can be displaced between a position C and a position D in the first channel relative to the first rail 20 . The second connecting seat 84 is connected to the third rail 40 . In addition, as shown in FIG. 7, the first connection base 82 is assembled to a first arm 112 connected to a cable management device 110, and the second connection base 84 is assembled to a first arm 112 connected to the wire management device 110. The second arm 114 , wherein the second arm 114 is movably connected to the first arm 112 . In a preferred embodiment, the first arm 112 and the second arm 114 are pivotally connected to each other. The cable management device 110 can support and organize the cables on the cabinet 90 . Furthermore, when the cabinet 90 is received into the rack, the cable management device 110 is folded.

According to the above configuration, when the third rail 40 is displaced outward along the first direction X to a first predetermined position, the first connection base 82 can be pulled by the third rail 40 and pass through the cable management The device 110 is displaced within this first channel. As shown in FIGS. 8 and 9 , when the cabinet 90 is pulled out from the rack, one end of the first arm 112 of the cable management device 110 can be displaced along with the slide rail assembly 10 . In other words, when the third rail 40 is pulled out, both ends of the cable management device 110 can be displaced along with the third rail 40 . Therefore, when the sliding stroke of the slide rail assembly 10 is increased, the lengths of the first arm 112 and the second arm 114 of the cable management device 110 can be reduced, and the supporting members for supporting the cable management device 110 become insufficient. Need again. On the other hand, if there is a requirement for the configuration of the cable management device 110 with a longer sliding stroke, a support member (not shown in the figure) can also be optionally installed to support the cable management device 110 .

Referring to FIG. 1 again, according to an embodiment of the present invention, when the first connecting seat 82 is displaced to reach the position D, the first rail 20 further includes a blocking portion 86 for blocking the first connecting seat 82 . However, in other embodiments of the present invention, the blocking portion 86 is unnecessary.

Referring to FIG. 10 and FIG. 11 , FIG. 10 and FIG. 11 show that the first connection base includes an elastic arm for locking with the second rail. According to an embodiment of the present invention, the first connection base 82 includes an elastic arm 83, and a hook portion 85 of the elastic arm 83 can enter into an opening 36 of the second rail 30 for connecting the first connection. seat 82 and the second rail 30. As shown in FIG. 12 , when the first connecting seat 82 is not at the position D, the elastic arm 83 is pushed to push the hook portion 85 of the elastic arm 83 into the opening 36 of the second rail 30 , The first connecting base 82 and the second rail 30 can be engaged to drive the second rail 30 to move.

As shown in Figure 13, when the displacement of the first connection seat 82 reaches the position D, a release unit such as a release hole 26 is provided on the first rail 20, so that the elastic arm 83 can be restored, so that the elastic arm The hook portion 85 of 83 moves out from the opening 36 of the second rail 30 to release the elastic arm 83 from the second rail 30 . In this way, the first connecting seat 82 no longer moves along with the second rail 30 . Furthermore, the elastic arm 83 further includes a hinged portion 87 assembled to tighten the second rail 30, so that when the second rail 30 is pushed toward the position C, the first connecting seat 82 can The second rail 30 is pushed to be displaced with the second rail 30 . However, the embodiments of the present invention are not limited to the above, and the present invention can also include other types of structures, so that the first connecting seat 82 can be connected to the second rail 30 and released from the second rail 30 .

In addition, the sliding rail assembly of the present invention is not limited to include the first rail, the second rail and the third rail. In other embodiments of the present invention, the second rail can be omitted, and the third rail can be replaced by the second rail being movably connected to the first rail and movable relative to the first channel of the first rail.

According to the above description, it can be seen that the enhancement effect and advantages of the present invention are:

Compared with the prior art, the slide rail assembly of the present invention includes a support base movably mounted on the first bracket for supporting the slide rails pulled out. When the cabinet is pulled out from the rack, it can carry the cabinet and be more stable. Therefore, when the sliding stroke of the slide rail increases, the slide rail assembly of the present invention can provide better support.

Although the present invention has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, and other modifications can be made without departing from the spirit of the present invention. Various equivalent changes and modifications, therefore, as long as the changes and modifications to the above embodiments are within the true spirit of the present invention, they will all fall within the scope of the claims of the present application.

Claims (19)

1. A slide rail assembly comprising a first rail, a second rail, a bracket and a support seat, characterized in that: the first rail defines a first channel along a first direction; the second rail is movably connected to the first rail; the bracket is connected to one end of the first rail; and The support base is movably installed on the bracket and can move relative to the bracket to displace along the first direction. The support base includes a first support portion to define a support channel corresponding to the first channel. The support base configured to allow displacement of the second rail into the support channel; The first rail includes two first side walls, and a first side wall connected between the two first side walls, the two first side walls and the first side wall jointly define the first channel , the second rail is movably displaced relative to the first channel of the first rail, the second rail includes two second side walls, and a second side wall is connected between the two second side walls, The two second side walls and the second side wall jointly define a second passage, and the slide rail assembly further includes a third rail movably connected to the second rail and the second passage relative to the second rail is Moveable displacement. 2. The slide rail assembly according to claim 1, wherein the first supporting portion comprises two supporting side walls, and a supporting side wall is connected between the two supporting side walls, and the two supporting side walls The supporting side walls respectively correspond to the two second side walls of the second rail, and the supporting side walls correspond to the second side walls of the second rail. 3. A slide rail assembly, comprising a first rail, a second rail, a bracket and a support seat, the first rail defines a first passage along a first direction; the second rail is movably connected to the first rail; the bracket is connected to one end of the first rail; and The support base is movably installed on the bracket and can move relative to the bracket to displace along the first direction. The support base includes a first support portion to define a support channel corresponding to the first channel. The support base Assembled so that the second rail can be displaced into the support channel; characterized in that, the bracket includes two third side walls, and a third side wall connected between the two third side walls Between, the two third side walls and the third side wall jointly define a third channel, the third channel is along the first direction, and the support base further includes a second support portion movably connected to the bracket And the third passage relative to the bracket is movably displaced. 4. A slide rail assembly, comprising a first rail, a second rail, a bracket and a support seat, the first rail defines a first passage along a first direction; the second rail is movably connected to the first rail; the bracket is connected to one end of the first rail; and The support base is movably installed on the bracket and can move relative to the bracket to displace along the first direction. The support base includes a first support portion to define a support channel corresponding to the first channel. The support base The assembly is used to allow the second rail to be displaced into the supporting channel; the feature is that the first rail and the bracket are formed together. 5. A slide rail assembly, comprising a first rail, a second rail, a bracket and a support seat, the first rail defines a first passage along a first direction; the second rail is movably connected to the first rail; the bracket is connected to one end of the first rail; and The support base is movably installed on the bracket and can move relative to the bracket to displace along the first direction. The support base includes a first support portion to define a support channel corresponding to the first channel. The support base Assembled so that the second rail can be displaced into the support channel; characterized in that, the first rail and the bracket are installed on different planes, the bracket is along a second direction, the The second direction is perpendicular to the first direction. 6. A slide rail assembly, comprising a first rail, a second rail, a bracket and a support seat, characterized in that: The first rail includes two first side walls, and a first side wall is connected between the two first side walls, and the two first side walls and the first side wall jointly define a first channel , the first channel is along a first direction; the second rail is movably connected to the first rail; the bracket is connected to one end of the first rail; and The support base is movably installed on the bracket and can move relative to the bracket to displace along the first direction, the support base includes a first support portion defining a support channel corresponding to the first channel; Wherein, when the second rail is relatively displaced in the first channel of the first rail, a part of the second rail is displaced into the supporting channel, and the second rail is supported by the first support portion of the support seat that part of the . 7. The slide rail assembly according to claim 6, wherein the second rail comprises two second side walls, and a second side wall is connected between the two second side walls, the The two second side walls and the second side wall jointly define a second channel along the first direction, and the slide rail assembly further includes a third rail movably connected to the second rail and opposite to the second rail The second channel is movably displaced. 8. The slide rail assembly according to claim 7, wherein the first supporting portion comprises two supporting side walls, and a supporting side wall is connected between the two supporting side walls, and the two supporting side walls The supporting side walls respectively correspond to the two second side walls of the second rail, and the supporting side walls correspond to the second side walls of the second rail. 9. The slide rail assembly according to claim 6, wherein the bracket comprises two third side walls and a third side wall connected between the two third side walls, the two third side walls The third side wall and the third side wall jointly define a third channel, the third channel is along the first direction, and the support base further includes a second support portion movably connected to the bracket and opposite to the bracket The third channel is movably displaced. 10. The slide rail assembly according to claim 6, wherein the support seat further comprises at least one contact portion mounted on the first support portion, when a part of the second rail is displaced into the support channel At this time, the part of the second rail contacts the contact part to drive the supporting base to move relative to the bracket along the first direction. 11. The slide rail assembly according to claim 6, wherein the first rail and the bracket are integrally formed. 12. The slide rail assembly according to claim 6, wherein the first rail and the bracket are installed on different planes, the bracket is along a second direction, and the second direction is perpendicular to the first direction. 13. A slide rail assembly, assembled and installed from a cabinet to a rack, the slide rail assembly includes a first rail, a first bracket, a second bracket, a support seat, and a second rail And a third track, characterized in that: The first rail includes two first side walls, and a first side wall is connected between the two first side walls, and the two first side walls and the first side wall jointly define a first channel , the first channel is along a first direction; The first bracket connects the first end of the first rail and assembles a first column attached to the frame; the second bracket connects the second end of the first rail and assembles a second column attached to the frame; The support seat is movably installed on the first bracket and can move relative to the first bracket to displace along the first direction, and the support seat includes a first support portion to define a support channel corresponding to the first channel ; The second rail is movably connected to the first rail, the second rail includes two second side walls, and a second side wall is connected between the two second side walls, and the two second side walls and the second side wall together define a second passage along the first direction; and The third rail is movably connected to the second rail, and the cabinet is installed on the third rail; Wherein, when the second rail is relatively displaced in the first channel of the first rail, a part of the second rail is displaced into the supporting channel, and the second rail is supported by the first support portion of the support seat that part of the . 14. A slide rail assembly, which is assembled and installed from a cabinet to a rack, and the slide rail assembly includes a first rail, a first bracket, a second bracket, a support base, and a second rail and a third track; The first rail includes two first side walls, and a first side wall is connected between the two first side walls, and the two first side walls and the first side wall jointly define a first channel , the first channel is along a first direction; The first bracket connects the first end of the first rail and assembles a first column attached to the frame; the second bracket connects the second end of the first rail and assembles a second column attached to the frame; The support seat is movably installed on the first bracket and can move relative to the first bracket to displace along the first direction, and the support seat includes a first support portion to define a support channel corresponding to the first channel ; The second rail is movably connected to the first rail, the second rail includes two second side walls, and a second side wall is connected between the two second side walls, and the two second side walls and the second side wall together define a second passage along the first direction; and The third rail is movably connected to the second rail, and the cabinet is installed on the third rail; Wherein, when the second rail is relatively displaced in the first channel of the first rail, a part of the second rail is displaced into the supporting channel, and the second rail is supported by the first support portion of the support seat The part is characterized in that the first supporting part includes two supporting side walls, and a supporting side wall is connected between the two supporting side walls, and the two supporting side walls respectively correspond to the second rail The two second side walls, and the supporting side wall corresponds to the second side wall of the second rail. 15. A slide rail assembly, assembled and installed from a cabinet to a rack, the slide rail assembly includes a first rail, a first bracket, a second bracket, a support seat, and a second rail and a third track; The first rail includes two first side walls, and a first side wall is connected between the two first side walls, and the two first side walls and the first side wall jointly define a first channel , the first channel is along a first direction; The first bracket connects the first end of the first rail and assembles a first column attached to the frame; the second bracket connects the second end of the first rail and assembles a second column attached to the frame; The support seat is movably installed on the first bracket and can move relative to the first bracket to displace along the first direction, and the support seat includes a first support portion to define a support channel corresponding to the first channel ; The second rail is movably connected to the first rail, the second rail includes two second side walls, and a second side wall is connected between the two second side walls, and the two second side walls and the second side wall together define a second passage along the first direction; and The third rail is movably connected to the second rail, and the cabinet is installed on the third rail; Wherein, when the second rail is relatively displaced in the first channel of the first rail, a part of the second rail is displaced into the supporting channel, and the second rail is supported by the first support portion of the support seat The part is characterized in that the first bracket includes two third side walls, and a third side wall is connected between the two third side walls, and the two third side walls and the first The three side walls jointly define a third passage along the first direction, and the support base further includes a second support portion movably connected to the bracket and movable relative to the third passage of the bracket ground displacement. 16. A slide rail assembly, which is assembled and installed from a cabinet to a rack, and the slide rail assembly includes a first rail, a first bracket, a second bracket, a support seat, and a second rail and a third track; The first rail includes two first side walls, and a first side wall is connected between the two first side walls, and the two first side walls and the first side wall jointly define a first channel , the first channel is along a first direction; The first bracket connects the first end of the first rail and assembles a first column attached to the frame; the second bracket connects the second end of the first rail and assembles a second column attached to the frame; The support seat is movably installed on the first bracket and can move relative to the first bracket to displace along the first direction, and the support seat includes a first support portion to define a support channel corresponding to the first channel ; The second rail is movably connected to the first rail, the second rail includes two second side walls, and a second side wall is connected between the two second side walls, and the two second side walls and the second side wall together define a second passage along the first direction; and The third rail is movably connected to the second rail, and the cabinet is installed on the third rail; Wherein, when the second rail is relatively displaced in the first channel of the first rail, a part of the second rail is displaced into the supporting channel, and the second rail is supported by the first support portion of the support seat The part, characterized in that, the support base further includes at least one contact part mounted on the first support part, when a part of the second rail is displaced into the support channel, the part of the second rail contacts The contact portion is used to drive the supporting base to move relative to the first bracket along the first direction. 17. A slide rail assembly, which is assembled and installed from a cabinet to a rack, and the slide rail assembly includes a first rail, a first bracket, a second bracket, a support base, and a second rail and a third track; The first rail includes two first side walls, and a first side wall is connected between the two first side walls, and the two first side walls and the first side wall jointly define a first channel , the first channel is along a first direction; The first bracket connects the first end of the first rail and assembles a first column attached to the frame; the second bracket connects the second end of the first rail and assembles a second column attached to the frame; The support seat is movably installed on the first bracket and can move relative to the first bracket to displace along the first direction, and the support seat includes a first support portion to define a support channel corresponding to the first channel ; The second rail is movably connected to the first rail, the second rail includes two second side walls, and a second side wall is connected between the two second side walls, and the two second side walls and the second side wall together define a second passage along the first direction; and The third rail is movably connected to the second rail, and the cabinet is installed on the third rail; Wherein, when the second rail is relatively displaced in the first channel of the first rail, a part of the second rail is displaced into the supporting channel, and the second rail is supported by the first support portion of the support seat The part of the present invention is characterized in that the first rail and the first bracket are integrally formed. 18. A slide rail assembly, assembled and installed from a cabinet to a rack, the slide rail assembly includes a first rail, a first bracket, a second bracket, a support seat, and a second rail and a third track; The first rail includes two first side walls, and a first side wall is connected between the two first side walls, and the two first side walls and the first side wall jointly define a first channel , the first channel is along a first direction; The first bracket connects the first end of the first rail and assembles a first column attached to the frame; the second bracket connects the second end of the first rail and assembles a second column attached to the frame; The support seat is movably installed on the first bracket and can move relative to the first bracket to displace along the first direction, and the support seat includes a first support portion to define a support channel corresponding to the first channel ; The second rail is movably connected to the first rail, the second rail includes two second side walls, and a second side wall is connected between the two second side walls, and the two second side walls and the second side wall together define a second passage along the first direction; and The third rail is movably connected to the second rail, and the cabinet is installed on the third rail; Wherein, when the second rail is relatively displaced in the first channel of the first rail, a part of the second rail is displaced into the supporting channel, and the second rail is supported by the first support portion of the support seat The part is characterized in that the first rail and the bracket are mounted on different planes, the bracket is along a second direction, and the second direction is perpendicular to the first direction. 19. A slide rail assembly, which is assembled and installed from a cabinet to a rack, and the slide rail assembly includes a first rail, a first bracket, a second bracket, a support base, and a second rail and a third track; The first rail includes two first side walls, and a first side wall is connected between the two first side walls, and the two first side walls and the first side wall jointly define a first channel , the first channel is along a first direction; The first bracket connects the first end of the first rail and assembles a first column attached to the frame; the second bracket connects the second end of the first rail and assembles a second column attached to the frame; The support seat is movably installed on the first bracket and can move relative to the first bracket to displace along the first direction, and the support seat includes a first support portion to define a support channel corresponding to the first channel ; The second rail is movably connected to the first rail, the second rail includes two second side walls, and a second side wall is connected between the two second side walls, and the two second side walls and the second side wall together define a second passage along the first direction; and The third rail is movably connected to the second rail, and the cabinet is installed on the third rail; Wherein, when the second rail is relatively displaced in the first channel of the first rail, a part of the second rail is displaced into the supporting channel, and the second rail is supported by the first support portion of the support seat The part is characterized in that the cabinet comprises a first part and a second part, the width of the first part is larger than that of the second part, and one side of the second part is installed on the third rail.