CN113693388A

CN113693388A - Sliding rail assembly

Info

Publication number: CN113693388A
Application number: CN202010428567.4A
Authority: CN
Inventors: 陈庚金; 杨顺和; 翁子承; 王俊强
Original assignee: King Slide Works Co Ltd; King Slide Technology Co Ltd
Current assignee: King Slide Works Co Ltd; King Slide Technology Co Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-11-26
Anticipated expiration: 2040-05-20
Also published as: CN113693388B

Abstract

The invention relates to a slide rail assembly, which comprises a first rail, a second rail and at least one workpiece. The first rail is provided with a channel; the second rail is movably arranged in the channel of the first rail; the at least one workpiece is arranged on the first rail and adjacent to one end part of the first rail. The at least one workpiece includes a first working portion and a second working portion. The first working part is positioned in the channel of the first rail, and the second working part exceeds the end part of the first rail and is positioned outside the channel of the first rail; when the second rail is displaced from a predetermined position to one direction and a rail section of the second rail exceeds the end of the first rail and is positioned outside the channel of the first rail, the second working part of the at least one working piece is used for supporting at least one part of the rail section of the second rail.

Description

Sliding rail assembly

Technical Field

The present invention relates to a slide rail assembly, and more particularly, to a slide rail assembly capable of optimizing a configuration of a slide rail supporting structure.

Background

Fig. 1 to 3 illustrate a slide rail assembly configured with a slide rail support structure. The slide assembly includes a first rail 100, a second rail 102, a third rail 104, a first ball device 106, a second ball device 108, a first stopper 110, a second stopper 112, a first bracket 114, and a second bracket 116. Wherein the first ball device 106 is disposed between the first rail 100 and the second rail 102. The second ball means 108 is disposed between the second rail 102 and the third rail 104. The first stopper 110 is fixedly disposed adjacent to the front end of the first rail 100 for preventing the first ball device 106 from sliding out of the front end of the first rail 100 and providing support for the second rail 102. Similarly, the second stopper 112 is fixedly disposed adjacent to the front end of the second rail 102 for stopping the second ball device 108 from sliding out of the front end of the second rail 102 and providing support for the third rail 104. The first bracket 114 and the second bracket 116 are respectively disposed at two ends of the first rail 100 for being mounted on a front column and a rear column of a rack (rack), for example, fig. 3 shows that the first bracket 114 is mounted on the front column 118 of the rack (rack), and a supporting member 120 (as shown in fig. 1 and 3) is respectively disposed at an upper side and a lower side of the first bracket 114, so that when the second rail 102 is pulled out and displaced into a channel 122 defined by the upper side and the lower side of the first bracket 114 to contact with the supporting member 120, the supporting member 120 can provide support for the second rail 102, thereby enhancing the supporting capability between the first bracket 114 and the second rail 102.

Fig. 1 to 3 show a prior art design of the applicant and have filed european patent application, which is approved to be published in EP2777431B 1. However, since the load supporting capability of the slide rail required by the chassis (chassis) with different specifications is different, many different cross-sectional configurations of the slide rail are derived to meet the installation requirements of different chassis, but the support member 120 of the prior art needs to be additionally configured and also ensures that the support member 120 bears the contact structure at the pull-out position of the slide rail (e.g., the second rail 102), so that effective support can be achieved. In addition, since the supporting member 120 is disposed on the first bracket 114, a gap 124 is formed between the supporting member 120 and the first stopper 110, and thus, there is still room for improvement in structural strength. On the other hand, since the supporting member 120 is disposed on the first bracket 114, in order to match the slide rail with different chassis (e.g. 1U chassis or 2U chassis) specifications, the bracket should be prepared with 1U or 2U or other specifications of material to match the installation between the slide rail and the bracket, which causes additional cost and burden of inventory management due to additional material preparation.

Therefore, the present invention was developed in order to optimize the design of the solution.

Disclosure of Invention

The invention aims to provide a slide rail assembly capable of optimizing the configuration of a slide rail supporting structure.

According to an aspect of the present invention, a sliding rail assembly includes a first rail, a second rail, a sliding aid and at least one working member. The first rail comprises a first wall, a second wall and a first longitudinal wall which are connected between the first wall and the second wall, and the first wall, the second wall and the first longitudinal wall define a channel together; the second rail is movably arranged in the channel of the first rail; the sliding-assistant device is arranged in the channel of the first rail and comprises a plurality of rolling pieces for being supported between the first rail and the second rail; the at least one working piece is arranged on the first rail and is adjacent to one end part of the first rail, the at least one working piece comprises a first working part and a second working part, the first working part is positioned in the channel of the first rail, and the second working part exceeds the end part of the first rail and is positioned outside the channel of the first rail; when the second rail moves from a first preset position to a first direction and a rail section of the second rail exceeds the end part of the first rail and is positioned outside the channel of the first rail, the second working part of the at least one workpiece is used for supporting at least one part of the rail section of the second rail; the first working part of the at least one working piece is used for preventing the sliding-assistant device from moving from the inside of the channel of the first rail to the outside of the channel of the first rail.

Preferably, when the second rail moves from the first predetermined position to the second predetermined position in the first direction, the sliding device moves from a first sliding position to a second sliding position, and the first working portion of the at least one working member can block the sliding device from stopping at the second sliding position, so as to prevent the sliding device from moving from the inside of the channel of the first rail to the outside of the channel of the first rail.

Preferably, the first working portion and the second working portion of the at least one working member are integrated together.

Preferably, the second rail includes a third wall, a fourth wall and a second longitudinal wall connected between the third wall and the fourth wall.

Preferably, the at least one workpiece comprises a first workpiece and a second workpiece; when the second rail is displaced from the first predetermined position to the first direction and the rail section of the second rail exceeds the end of the first rail and is located outside the channel of the first rail, the second working portion of the first working member and the second working portion of the second working member are respectively used for supporting at least one part of a third wall and a fourth wall of the rail section of the second rail.

Preferably, the rolling members of the sliding assistance device include a lower ball for being supported between the first wall of the first rail and the third wall of the second rail, and an upper ball for being supported between the second wall of the first rail and the fourth wall of the second rail.

Preferably, the cross sections of the first and second working members each include a first support section and a second support section, and the first and second support sections of the first working member are respectively used for matching with a bead groove of the first wall of the first rail and a bead groove of the third wall of the second rail; the first supporting section and the second supporting section of the second workpiece are respectively matched with a bead groove of the second wall of the first rail and a bead groove of the fourth wall of the second rail.

Preferably, the slide rail assembly further comprises a bracket device, the bracket device is connected with the first rail and is adjacent to the end part of the first rail, and the bracket device comprises a first supporting wall, a second supporting wall and a side wall which are connected between the first supporting wall and the second supporting wall; the first supporting wall is used for supporting a first wall of the first rail and a second working part of the first working piece, and the second supporting wall is used for supporting a second wall of the first rail and a second working part of the second working piece.

Preferably, the first supporting wall of the bracket device and the second working portion of the first working member have a first characteristic and a second characteristic corresponding to each other.

Preferably, the second support wall of the bracket device and the second working portion of the second working member have a third feature and a fourth feature corresponding to each other.

Preferably, the carriage apparatus further comprises at least one mounting member for providing mounting of the first rail to a frame.

Preferably, the slide assembly further comprises a third rail movably mounted in a channel of the second rail.

According to another aspect of the present invention, a sliding rail assembly includes a first rail, a second rail and at least one working member. The first rail defines a channel; the second rail is movably arranged in the channel of the first rail; the at least one working piece is arranged on the first rail and is adjacent to one end part of the first rail, the at least one working piece comprises a first working part and a second working part which are connected with the first working part, the first working part is positioned in the channel of the first rail, and the second working part exceeds the end part of the first rail and is positioned outside the channel of the first rail; when the second rail moves from a first preset position to a first direction and a rail section of the second rail exceeds the end part of the first rail and is positioned outside the channel of the first rail, the second working part of the at least one working piece is used for supporting at least one part of the rail section of the second rail.

Drawings

For further explanation of the above objects, structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings, in which:

fig. 1 is a schematic view illustrating a rail assembly configured with a rail supporting structure in a retracted state according to the prior art.

FIG. 2 is a schematic cross-sectional view of a prior art slide rail assembly.

FIG. 3 is a schematic view of a prior art slide rail assembly configured with a slide rail support structure mounted to a frame and in an extended state.

Fig. 4 is a schematic perspective view illustrating a slide rail assembly according to an embodiment of the invention.

Fig. 5 is an exploded view of a slide rail assembly according to an embodiment of the invention.

FIG. 6 is a schematic view of the assembly of the first rail, a bracket device and at least one working member of the slide rail assembly according to the embodiment of the invention.

Fig. 7 is a schematic view illustrating a slide rail assembly in a retracted state according to an embodiment of the present invention.

Fig. 8 is a schematic view of a slide rail assembly according to an embodiment of the invention in an extended state.

FIG. 9 is a schematic view of the slide rail assembly of the embodiment of the invention mounted to a frame in an extended state.

Fig. 10 is a schematic cross-sectional view of a slide rail assembly according to an embodiment of the invention.

Detailed Description

As shown in fig. 4 and 5, a slide rail assembly 20 according to an embodiment of the present invention includes a first rail 22, a second rail 24, a sliding aid 26, and at least one working member, such as a first working member 28 and a second working member 30. Preferably, a third rail 32 and a bracket device 33 are also included.

The first rail 22 has a first end 22a and a second end 22b, such as a front end and a rear end, but the implementation is not limited thereto. The first rail 22 includes a first wall 34a, a second wall 34b and a first longitudinal wall 36 connected between the first wall 34a and the second wall 34b, and the first wall 34a, the second wall 34b and the first longitudinal wall 36 together define a channel 38.

The second rail 24 is movably mounted in the channel 38 of the first rail 22. The second rail 24 includes a third wall 40a, a fourth wall 40b and a second longitudinal wall 42 connected between the third wall 40a and the fourth wall 40b, and the third wall 40a, the fourth wall 40b and the second longitudinal wall 42 together define a channel. The third rail 32 is movably mounted within the channel of the second rail 24.

The sliding aid 26 is disposed in the channel 38 of the first rail 22, and the sliding aid 26 includes a plurality of rolling elements 44 for facilitating smooth displacement of the second rail 24 and the first rail 22 relative to each other. For example, the sliding assisting device 26 includes a first sliding assisting part 26a and a second sliding assisting part 26b, and the first sliding assisting part 26a and the second sliding assisting part 26b respectively include a plurality of lower balls 44 and a plurality of upper balls 44 (this portion can refer to fig. 7 or fig. 8).

As shown in fig. 5 and 6, the first and second working

members

28 and 30 are fixedly disposed on the first rail 22 adjacent to one end portion, such as the first end portion 22a, of the first rail 22. Preferably, the first and second working

members

28, 30 are both comprised of a metallic material, the first working member 28 is disposed on a first wall 34a adjacent the first rail 22, the second working member 30 is disposed on a second wall 34b adjacent the first rail 22, the first and second working

members

28, 30 are connected to the first rail 22 in substantially the same manner, and the first and second working

members

28, 30 have substantially the same structural configuration.

Taking the first working member 28 as an example, the first working member 28 and the first rail 22 have a first connecting portion 46 and a second connecting portion 48 corresponding thereto for connecting with each other. The mutual connection may be a snap connection or a snap connection, or may be a rivet connection or a welding connection in other embodiments, and the implementation is not limited. Further, the first working member 28 includes a first working portion 50 and a second working portion 52, and the first working portion 50 and the second working portion 52 are integrated together, such that the second working portion 52 is connected to the first working portion 50.

The first working portion 50 is arranged with the first connecting portion 46, but is not limited in implementation. The first working portion 50 is positioned within the channel 38 of the first rail 22 and the second working portion 52 is positioned outside the channel 38 of the first rail 22 beyond the first end 22a of the first rail 22.

The bracket device 33 is connected to the first rail 22, and the bracket device 33 is adjacent to the first end 22a of the first rail 22. The bracket device 33 comprises a first supporting wall 54a, a second supporting wall 54b and a side wall 56 connected between the first supporting wall 54a and the second supporting wall 54 b; the first supporting wall 54a is used to support the first wall 34a of the first rail 22 and the second working portion 52 of the first working member 28, and the second supporting wall 54b is used to support the second wall 34b of the first rail 22 and the second working portion 52 of the second working member 30.

Preferably, the first support wall 54a of the bracket device 33 and the second working portion 52 of the first working member 28 have a first feature 58 and a second feature 60 corresponding to each other, and the second support wall 54b of the bracket device 33 and the second working portion 52 of the second working member 30 have a third feature 62 and a fourth feature 64 corresponding to each other. In this embodiment, the first feature 58 and the second feature 60 are protrusions and recesses, so that the first supporting wall 54a and the second working portion 52 of the first working member 28 can be mutually supported or fastened; similarly, the third feature 62 and the fourth feature 64 are protrusions and recesses, so that the second support wall 54b and the second working portion 52 of the second working member 30 can be supported or clamped with each other.

Preferably, the bracket device 33 further includes an end wall 66 bent substantially perpendicular to the side wall 56, and at least one mounting member 68 disposed on the end wall 66, the at least one mounting member 68 being configured to provide mounting of the first rail 22 to a rack.

As shown in fig. 7, the slide rail assembly 20 is in a retracted state. The second rail 24 is located at a first predetermined position P1 (such as a retracted position, but not limited to) relative to the first rail 22, the third rail 32 is retracted relative to the second rail 24, and the sliding assisting device 26 (such as the first sliding assisting portion 26a and the second sliding assisting portion 26b) is located at a first sliding assisting position K1. In addition, the lower balls 44 of the first slide aid 26a of the slide aid 26 are supported between the first wall 34a of the first rail 22 and the third wall 40a of the second rail 24, and the upper balls 44 of the second slide aid 26b of the slide aid 26 are supported between the second wall 34b of the first rail 22 and the fourth wall 40b of the second rail 24.

Preferably, the first rail 22 further comprises at least one blocking portion 70 adjacent to the second end 22b of the first rail 22 for preventing the second rail 24 from being separated from the first rail 22 along a second direction (e.g., a folding direction).

Preferably, the second rail 24 further comprises at least one pushing portion, such as a first pushing portion 72a and a second pushing portion 72b corresponding to the first sliding assisting portion 26a and the second sliding assisting portion 26b of the sliding assisting device 26.

As shown in fig. 7 and 8, when the second rail 24 is displaced from the first predetermined position P1 in a first direction D1 (e.g., an opening direction) and a rail segment X of the second rail 24 is beyond the first end 22a of the first rail 22 and outside the channel 38 of the first rail 22, the second working portion 52 of the at least one working member, e.g., the first working member 28, can be used to support at least a portion of the rail segment X of the second rail 24. In addition, the first working portion 50 of the at least one working member, such as the first working member 28, is configured to prevent the sliding aid 26 from being displaced from within the channel 38 of the first rail 22 to outside the channel 38 of the first rail 22. Specifically, during the process of moving the second rail 24 from the first predetermined position P1 to the first direction D1 to a second predetermined position P2 (such as the extended position, but not limited to), the sliding assistance device 26 is moved from the first sliding assistance position K1 to the first direction D1 to a second sliding assistance position K2 (as shown in fig. 8), and the first working portion 50 of the at least one working member (the first working member 28 and the second working member 30) can block the sliding assistance device 26 (the first sliding assistance portion 26a and the second sliding assistance portion 26b) from stopping at the second sliding assistance position K2, so as to prevent the sliding assistance device 26 from moving from the inside of the channel 38 of the first rail 22 to the outside of the channel 38 of the first rail 22.

Preferably, when the second rail 24 is moved from the first predetermined position P1 to the second predetermined position P2 in the first direction D1 such that the slide rail assembly 20 is in an extended state and the section X of the second rail 24 exceeds the first end 22a of the first rail 22 and is located outside the channel 38 of the first rail 22, the second working portion 52 of the first working member 28 and the second working portion 52 of the second working member 30 are respectively used to support at least a portion of the third wall 40a and the fourth wall 40b of the section X of the second rail 24 (as shown in fig. 8).

Preferably, when the second rail 24 is displaced from the first predetermined position P1 to the second predetermined position P2 in the first direction D1, two ends (e.g., front end and rear end) of the first slide-assisting portion 26a respectively abut between the first working portion 50 of the first workpiece 28 and the first pushing portion 72a of the second rail 24, and two ends (e.g., front end and rear end) of the second slide-assisting portion 26b respectively abut between the first working portion 50 of the second workpiece 30 and the second pushing portion 72b of the second rail 24 (as shown in fig. 8).

As shown in fig. 9, at least one mounting member 68 of the carriage assembly 33 is configured to provide mounting of the first rail 22 to a mast 74 of a rack. Please refer to fig. 8 and the description thereof for the structural configuration relationship that the slide rail assembly 20 is in the extended state, and the description thereof is omitted here for the sake of brevity.

As shown in fig. 10, the cross-sections of the first and second working

members

28, 30 each include a first support section 76 and a second support section 78, the first and

second support sections

76, 78 of the first working member 28 being configured to mate with (e.g., support each other) a first bead 80a of the first wall 34a of the first rail 22 and a second bead 80b of the third wall 40a of the second rail 24, respectively; the first support section 76 and the second support section 78 of the second working member 30 are respectively configured to match (e.g., support) a third bead 80c of the second wall 34b of the first rail 22 and a fourth bead 80d of the fourth wall 40b of the second rail 24.

From the above description, it can be seen that the enhanced efficacy and advantages of the present invention are:

a. compared to the gap 124 (see fig. 1 or fig. 3) formed between the support 120 and the first stopper 110 in the prior art, the first working portion 50 of the at least one working member (e.g., the first working member 28 or the second working member 30) of the present embodiment is located in the channel 38 of the first rail 22, and the second working portion 52 extends from the first working portion 50 and beyond the end 22a of the first rail 22 to be located outside the channel 38 of the first rail 22, so that the at least one working member (e.g., the first working member 28 or the second working member 30) has better structural strength. Wherein, when the second rail 24 is at the second predetermined position P2, the second working portion 52 of the at least one working member is configured to support at least a portion of the rail segment X of the second rail 24, and the first working portion 50 of the at least one working member is configured to block and prevent the sliding aid 26 from being displaced from the inside of the channel 38 of the first rail 22 to the outside of the channel 38 of the first rail 22.

b. The first supporting wall 54a of the bracket device 33 is used for supporting the first wall 34a of the first rail 22 and the second working portion 52 of the first working member 28, and the second supporting wall 54b of the bracket device 33 is used for supporting the second wall 34b of the first rail 22 and the second working portion 52 of the second working member 30. Accordingly, the bracket device 33, the first rail 22 and at least one working member (the first working member 28 and the second working member 30) are supported to each other to contribute to the improvement of the structural strength.

c. The extra stock preparation can be reduced, and the burden of inventory management is reduced.

Although the present invention has been described with reference to the present specific embodiments, it will be recognized by those skilled in the art that the above embodiments are illustrative only, and various equivalent changes and modifications may be made without departing from the spirit of the present invention, and therefore, it is intended to cover in the appended claims all such changes and modifications as fall within the true spirit of the invention.

Claims

1. A slide rail assembly comprises a first rail, a second rail, a sliding aid and at least one workpiece, wherein the first rail comprises a first wall, a second wall and a first longitudinal wall which are connected between the first wall and the second wall, the first wall, the second wall and the first longitudinal wall define a channel together, the second rail is movably arranged in the channel of the first rail, the sliding aid is arranged in the channel of the first rail, and the sliding aid comprises a plurality of rolling members for supporting between the first rail and the second rail, the slide rail assembly is characterized in that:

the at least one working piece is arranged on the first rail and is adjacent to one end part of the first rail, the at least one working piece comprises a first working part and a second working part, the first working part is positioned in the channel of the first rail, and the second working part exceeds the end part of the first rail and is positioned outside the channel of the first rail;

when the second rail moves from a first preset position to a first direction and a rail section of the second rail exceeds the end part of the first rail and is positioned outside the channel of the first rail, the second working part of the at least one workpiece is used for supporting at least one part of the rail section of the second rail;

the first working part of the at least one working piece is used for preventing the sliding-assistant device from moving from the inside of the channel of the first rail to the outside of the channel of the first rail.

2. The slide rail assembly of claim 1 wherein the sliding assistance device moves from a first sliding assistance position to a second sliding assistance position during the movement of the second rail from the first predetermined position to the first predetermined position, and the first working portion of the at least one working member blocks the sliding assistance device from stopping at the second sliding assistance position to prevent the sliding assistance device from moving from the inside of the channel of the first rail to the outside of the channel of the first rail.

3. The slide rail assembly of claim 1 wherein the first working portion and the second working portion of the at least one working member are integral.

4. The slide rail assembly of claim 1 wherein the second rail comprises a third wall, a fourth wall, and a second longitudinal wall connected between the third wall and the fourth wall.

5. The slide rail assembly of claim 4 wherein the at least one working member includes a first working member and a second working member; when the second rail is displaced from the first predetermined position to the first direction and the rail section of the second rail exceeds the end of the first rail and is located outside the channel of the first rail, the second working portion of the first working member and the second working portion of the second working member are respectively used for supporting at least one part of a third wall and a fourth wall of the rail section of the second rail.

6. The slide rail assembly of claim 5 wherein the rolling elements of the sliding assistance device comprise a lower ball for being supported between the first wall of the first rail and the third wall of the second rail and an upper ball for being supported between the second wall of the first rail and the fourth wall of the second rail.

7. The slide rail assembly of claim 6 wherein the cross-section of the first and second working members each comprises a first support section and a second support section, the first and second support sections of the first working member being configured to mate with a bead groove of the first wall of the first rail and a bead groove of the third wall of the second rail, respectively; the first supporting section and the second supporting section of the second workpiece are respectively matched with a bead groove of the second wall of the first rail and a bead groove of the fourth wall of the second rail.

8. The slide rail assembly of claim 5 further comprising a bracket means connected to the first rail adjacent the end of the first rail, the bracket means comprising a first support wall, a second support wall and a side wall connected between the first support wall and the second support wall; the first supporting wall is used for supporting a first wall of the first rail and a second working part of the first working piece, and the second supporting wall is used for supporting a second wall of the first rail and a second working part of the second working piece.

9. The slide rail assembly of claim 8 wherein the first support wall of the bracket device and the second working portion of the first working member have a first characteristic and a second characteristic corresponding to each other.

10. The slide rail assembly of claim 9 wherein the second support wall of the bracket device and the second working portion of the second working member have a third feature and a fourth feature corresponding to each other.

11. The slide rail assembly of claim 8 wherein the bracket device further comprises at least one mounting member for providing mounting of the first rail to a frame.

12. The slide rail assembly of claim 1 further comprising a third rail movably mounted in a channel of the second rail.

13. A slide rail assembly comprises a first rail, a second rail and at least one workpiece, wherein the first rail defines a channel, the second rail is movably arranged in the channel of the first rail, and the slide rail assembly is characterized in that:

the at least one working piece is arranged on the first rail and is adjacent to one end part of the first rail, the at least one working piece comprises a first working part and a second working part which are connected with the first working part, the first working part is positioned in the channel of the first rail, and the second working part exceeds the end part of the first rail and is positioned outside the channel of the first rail;

when the second rail moves from a first preset position to a first direction and a rail section of the second rail exceeds the end part of the first rail and is positioned outside the channel of the first rail, the second working part of the at least one working piece is used for supporting at least one part of the rail section of the second rail.

14. The slide rail assembly of claim 13 wherein the first rail includes a first wall, a second wall, and a first longitudinal wall connected between the first wall and the second wall, the first wall, the second wall, and the first longitudinal wall collectively defining the channel.

15. The slide rail assembly of claim 14 wherein the second rail includes a third wall, a fourth wall, and a second longitudinal wall connected between the third wall and the fourth wall.

16. The slide rail assembly of claim 15 wherein the at least one working member includes a first working member and a second working member; when the second rail is displaced from the first predetermined position to the first direction and the rail section of the second rail exceeds the end of the first rail and is located outside the channel of the first rail, the second working portion of the first working member and the second working portion of the second working member are respectively used for supporting at least one part of a third wall and a fourth wall of the rail section of the second rail.

17. The slide rail assembly of claim 16 further comprising a bracket means connected to the first rail adjacent an end of the first rail, the bracket means comprising a first support wall, a second support wall and a side wall connected between the first support wall and the second support wall; the first supporting wall is used for supporting a first wall of the first rail and a second working part of the first working piece, and the second supporting wall is used for supporting a second wall of the first rail and a second working part of the second working piece.

18. The slide rail assembly of claim 17 wherein the first support wall of the bracket device and the second working portion of the first working member have a first characteristic and a second characteristic corresponding to each other, and the second support wall of the bracket device and the second working portion of the second working member have a third characteristic and a fourth characteristic corresponding to each other.

19. The slide rail assembly of claim 13 wherein the at least one working member comprises a metallic material.

20. The slide rail assembly of claim 17 wherein the bracket device further comprises at least one mounting member for providing mounting of the first rail to a frame.