Slide rail assembly

Abstract

The present application relates to a slide rail assembly, which comprises a bracket, a support member, and a clamping member. The bracket has an opening and a stop portion. The support member is connected to a first rail, a second rail, a third rail, a blocking member, an auxiliary member, and a damping device in a sliding manner. The first rail, the second rail, and the third rail can be displaced longitudinally relative to each other; the third rail is located between the first rail and the second rail; the auxiliary member is arranged to the second rail; the damping device is arranged to the third rail; when the second rail is displaced from an extended position to a folding direction, the auxiliary member can push against the damping device through the blocking member.

Description

Technical Field

[0001] This invention relates to a slide rail mechanism, and more particularly to a slide rail assembly having multiple slide rail sections. Background Technology

[0002] For example, US Patent Publication No. 6,860,575B2 discloses a safety device for a slide rail, comprising an outer rail, a middle rail, an inner rail, and a limiting member pivotally mounted on the middle rail; the outer rail has a protrusion; the middle rail has a protrusion and a slot; an elastic plate is provided between the limiting member and the protrusion of the middle rail; the limiting member has a safety protrusion spaced a distance from the end of the middle rail and corresponding to and abutting the end of the inner rail, and the limiting member also has a latching protrusion extending into the slot of the middle rail and corresponding to and pushing against the protrusion of the outer rail to pivot the limiting member. According to this configuration, during the opening and closing process of the inner rail, the upper flange of the inner rail abuts against the safety protrusion, causing the inner rail and the middle rail to move synchronously in the closing direction, allowing a safe distance to be maintained between the front end of the inner rail and the front end of the middle rail, providing anti-pinch space. Thus, the safe distance can prevent accidental finger pinching injuries to the user. When the inner rail and the middle rail are further retracted by a certain distance, the limiting member will pivot at an angle due to the release protrusion being pushed by the protrusion of the outer rail. Accordingly, the safety protrusion will pivot accordingly and smoothly release its abutment relationship with the upper flange of the inner rail, so that the inner rail can be completely retracted into the middle rail.

[0003] However, with varying market demands, how to develop a different type of slide rail product has become a topic worth exploring. Summary of the Invention

[0004] The purpose of this invention is to provide a slide rail assembly with a buffer function when the multi-section slide rail is closed.

[0005] According to one aspect of the present invention, a slide rail assembly includes a first rail, a second rail, a third rail, a fourth rail, a release member, an auxiliary member, a stop member, and a damping device. The first rail, the second rail, the third rail, and the fourth rail are longitudinally displaceable relative to each other, wherein the third rail is located between the first rail and the second rail, and the fourth rail is located between the third rail and the second rail, wherein each of the first rail, the second rail, the third rail, and the fourth rail has a first end and a second end positioned opposite each other; the release member is arranged to the first rail; the auxiliary member is arranged to the second rail; the stop member is movably mounted to the fourth rail; the damping device is arranged to the third rail; wherein, when the slide rail assembly is in an extended state, the first end of the fourth rail extends beyond the first end of the third rail, and the second rail is in an extended position with its first end extending beyond the first end of the fourth rail; wherein, when the second rail extends from... During the process of the extended position moving in a retracting direction to the final stage of the stroke, the second rail contacts the stop member in a first state, causing the second rail and the fourth rail to move synchronously in the retracting direction. At this time, a predetermined distance is maintained between the first end of the second rail and the first end of the fourth rail. When the second rail and the fourth rail continue to move synchronously in the retracting direction until the stop member contacts the release member, the stop member is driven to move from the first state to a second state to release the synchronous displacement relationship between the second rail and the fourth rail in the retracting direction, thereby shortening the predetermined distance and allowing the auxiliary member of the second rail to push against the damping device, so that the damping device provides a buffering effect until the second rail reaches a retracted position.

[0006] According to another aspect of the invention, a slide rail assembly includes a first rail, a second rail, a third rail, an auxiliary component, and a damping device. The first rail, the second rail, and the third rail are longitudinally displaceable relative to each other, wherein the third rail is located between the first rail and the second rail, and each of the first rail, the second rail, and the third rail has a first end and a second end positioned opposite each other; the auxiliary component is arranged to the second rail; the damping device is arranged to the third rail; wherein, as the second rail displaces from an extended position in a retracting direction, the third rail retracts relative to the first rail in the retracting direction, and the auxiliary component of the second rail pushes against the damping device, so that the damping device provides a cushioning effect.

[0007] Overall, the multi-section slide rail assembly has a buffering function when retracted. Preferably, the damping device is activated by the second rail to provide a buffering effect when the second rail is displaced in the retracting direction to the retracted position, driven by the stop member. Attached Figure Description

[0008] To further illustrate and demonstrate the above-mentioned objectives, structural features, and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0009] Figure 1 A perspective view showing a slide rail assembly comprising a plurality of slide rail sections, according to an embodiment of the present invention.

[0010] Figure 2 A perspective view showing a slide rail assembly comprising a plurality of slide rail sections, according to an embodiment of the present invention.

[0011] Figure 3 This shows a cross-sectional schematic diagram of a slide rail assembly according to an embodiment of the present invention.

[0012] Figure 4 An exploded view of a slide rail and a damping device in a slide rail assembly according to an embodiment of the present invention is shown.

[0013] Figure 5 This diagram shows a combination of the slide rail and the damping device in a slide rail assembly according to an embodiment of the present invention.

[0014] Figure 6 A schematic diagram showing a slide rail assembly in an extended state according to an embodiment of the present invention.

[0015] Figure 7 A schematic diagram showing the slide rail of a slide rail assembly according to an embodiment of the present invention is shown, illustrating the displacement of the slide rail in a retracting direction.

[0016] Figure 8 A schematic diagram showing the slide rail of a slide rail assembly according to an embodiment of the present invention continues to move in the retracting direction.

[0017] Figure 9 A schematic diagram showing a slide rail assembly according to an embodiment of the present invention is shown, in which the slide rail is further displaced in the retracting direction.

[0018] Figure 10 A schematic diagram showing a slide rail assembly of an embodiment of the present invention in a retracted state. Detailed Implementation

[0019] like Figure 1 and Figure 2 As shown, a slide rail assembly 20 according to an embodiment of the present invention includes a first rail 22, a second rail 24, and a third rail 26, and preferably, a fourth rail 28 and a fifth rail 30. The first rail 22, the second rail 24, the third rail 26, the fourth rail 28, and the fifth rail 30 are longitudinally displaceable relative to each other. Here, the X-axis direction is the longitudinal direction (or the length direction of the slide rail), the Y-axis direction is the transverse direction (or the lateral direction of the slide rail), and the Z-axis direction is the vertical direction (or the height direction of the slide rail).

[0020] Specifically, the third rail 26 is located between the first rail 22 and the second rail 24, the fourth rail 28 is located between the third rail 26 and the second rail 24, and the fifth rail 30 is located between the first rail 22 and the third rail 26. Furthermore, each of the first rail 22, the second rail 24, the third rail 26, the fourth rail 28, and the fifth rail 30 has a first end and a second end in opposite positions, such as a front end and a rear end, but this is not a limitation in implementation. Specifically, the first rail 22 has a first end 22a and a second end 22b; the second rail 24 has a first end 24a and a second end 24b; the third rail 26 has a first end 26a and a second end 26b; the fourth rail 28 has a first end 28a and a second end 28b; and the fifth rail 30 has a first end 30a and a second end 30b.

[0021] The slide rail assembly 20 also includes a release member 32, an auxiliary member 34, a stop member 36, and a damping device 38.

[0022] The release element 32 is arranged (e.g., fixed) to the first rail 22. Preferably, the release element 32 is located at the second end 22b adjacent to the first rail 22.

[0023] The auxiliary member 34 is arranged (e.g., fixed) to the second rail 24. Preferably, the auxiliary member 34 is located at a first end 24a adjacent to the second rail 24.

[0024] The stop 36 is movably mounted to the fourth rail 28. Preferably, the stop 36 is located at the second end 28b adjacent to the fourth rail 28. Furthermore, the stop 36 is pivotally connected to the fourth rail 28 via a shaft 40, and the rail assembly 20 also includes an elastic element 42 for providing a spring force to the stop 36. The elastic element 42 is, for example, a torsion spring; or, in other alternative embodiments, the elastic element 42 may be a spring or other elastic object, and therefore, implementation is not limited.

[0025] The damping device 38 is arranged to the third rail 26. The damping device 38 is arranged to have an extension 43 that can extend beyond the first end 26a of the third rail 26 (e.g., Figure 2 (As shown).

[0026] Preferably, the third rail 26 is composed of a first rail portion 44 and a second rail portion 46 connected to each other, wherein the first rail portion 44 and the second rail portion 46 are fixedly connected to each other by at least one connecting feature 48, such as riveting or snapping, but the implementation is not limited (e.g. Figure 2 (As shown).

[0027] like Figure 3As shown, the fifth rail 30 is movably installed between the first rail 22 and the first rail portion 44 of the third rail 26, and the fourth rail 28 is movably installed between the second rail portion 46 of the third rail 26 and the second rail 24.

[0028] Preferably, the first rail portion 44 and the second rail portion 46 of the third rail 26 are arranged in opposite directions to each other. The first rail portion 44 includes a first wall 50a, a second wall 50b, and a longitudinal wall 52 connected between the first wall 50a and the second wall 50b of the first rail portion 44. The first wall 50a, the second wall 50b, and the longitudinal wall 52 of the first rail portion 44 together define a predetermined space N. The second rail portion 46 includes a first wall 54a, a second wall 54b, and a longitudinal wall 56 connected between the first wall 54a and the second wall 54b of the second rail portion 46. The first wall 54a, the second wall 54b, and the longitudinal wall 56 of the second rail portion 46 together define a channel K. The longitudinal wall 52 of the first rail portion 44 and the longitudinal wall 56 of the second rail portion 46 are fixedly connected to each other via the aforementioned connection feature 48 (this part can be referred to in conjunction with the above). Figure 2 Furthermore, the opening of the predetermined space N of the first track section 44 faces the opposite direction to the opening of the channel K of the second track section 46. For example, the opening of the predetermined space N of the first track section 44 faces a first lateral direction T1, while the opening of the channel K of the second track section 46 faces a second lateral direction T2 opposite to the first lateral direction T1.

[0029] Preferably, the first rail 22 and the second rail portion 46 of the third rail 26 have substantially the same structural configuration; the fifth rail 30 and the fourth rail 28 have substantially the same structural configuration; and the first rail portion 44 of the third rail 26 and the second rail 24 have substantially the same structural configuration.

[0030] Preferably, the first rail 22 defines a channel K' to accommodate the fifth rail 30, and the fifth rail 30 defines a first support channel to accommodate the first rail portion 44 of the third rail 26. The first rail 22, the fifth rail 30, and the first rail portion 44 of the third rail 26 can be considered as an outer rail, a middle rail, and an inner rail, respectively, forming a first slide rail device. On the other hand, the channel K of the second rail portion 46 of the third rail 26 is used to accommodate the fourth rail 28, and the fourth rail 28 defines a second support channel to accommodate the second rail 24. The second rail portion 46 of the third rail 26, the fourth rail 28, and the second rail 24 can be considered as an outer rail, a middle rail, and an inner rail, respectively, forming a second slide rail device. Thus, the slide rail assembly 20 can be considered as two sets of slide rail devices with three sections connected together.

[0031] Preferably, a plurality of first slip aid devices 58 (e.g., ball strips) are installed between the first rail 22 and the fifth rail 30, each containing a plurality of first balls B1 supported between the first rail 22 and the fifth rail 30, and a second slip aid device 60 (e.g., ball retainer) is installed between the fifth rail 30 and the first rail portion 44 of the third rail 26, each containing a plurality of second balls B2 supported between the fifth rail 30 and the first rail portion 44 of the third rail 26. Accordingly, this improves the smoothness of relative displacement between the first rail 22, the fifth rail 30, and the first rail portion 44 of the third rail 26. On the other hand, a plurality of third sliding aids 62 (e.g., ball bearings) comprising a plurality of third balls B3 are installed between the second rail portion 46 of the third rail 26 and the fourth rail 28, and a fourth sliding aid 64 (e.g., ball retainer) comprising a plurality of fourth balls B4 are installed between the fourth rail 28 and the second rail 24. This further improves the smoothness of relative displacement between the second rail portion 46 of the third rail 26, the fourth rail 28, and the second rail 24.

[0032] like Figure 4 and Figure 5 As shown, the damping device 38 is installed on one of the first rail portion 44 and the second rail portion 46 of the third rail 26. Here, a portion of the longitudinal wall 52 of the first rail portion 44 and a portion of the longitudinal wall 56 of the second rail portion 46 jointly define an auxiliary space M connecting the two opposite sides of the third rail 26, and this auxiliary space M is used to accommodate the damping device 38. The auxiliary space M is formed between a first predetermined wall portion 61 and a second predetermined wall portion 63 of the longitudinal wall 52 and the longitudinal wall 56.

[0033] The damping device 38 includes a cylinder 66 and a rod 68 that are retractable relative to each other. The cylinder 66 has a cushioning medium inside its housing, which may include a fluid (e.g., oil or a liquid). Preferably, the cylinder 66 also includes an auxiliary elastic element to provide elastic force to the rod 68 (e.g., a piston rod) and the cylinder 66. Since this part is within the scope of the art and will be understood by those skilled in the art, it will not be described further here for the sake of simplicity.

[0034] Preferably, the damping device 38 has a first predetermined end 72 and a second predetermined end 74 positioned opposite each other. The extension section 43 and an auxiliary section 70 are respectively installed on the cylinder body 66 and the rod 68 at locations relatively far apart from each other. The extension section 43 is, for example, an extension with a predetermined longitudinal length, and has a mounting portion 71 for mounting (e.g., fixing or snapping) to the outside of the cylinder body 66 and adjacent to the first predetermined end 72, so that the extension section 43 and the cylinder body 66 can be considered as one unit. The auxiliary section 70 is, for example, a single piece or a columnar body, but is not limited in implementation. The auxiliary section 70 is larger than the rod 68, and is mounted (e.g., fixed) to the rod 68 and adjacent to the second predetermined end 74, so that the auxiliary section 70 and the rod 68 can be considered as one unit. Accordingly, the overall longitudinal length of the damping device 38 can be extended through the extension section 43 and the auxiliary section 70.

[0035] Preferably, when the damping device 38 is in a buffer preparation state, a predetermined wall surface 75 of the mounting portion 71 can abut against the first predetermined wall portion 61, and the extension segment 43 extends longitudinally from the side of the mounting portion 71 by a predetermined length, wherein the extension segment 43 extends beyond the first end 26a of the third rail 26 by an extension distance J. On the other hand, the auxiliary segment 70 can abut against the second predetermined wall portion 63.

[0036] Preferably, the extension 43 bends perpendicularly to the predetermined wall 75, so that the extension 43 and the first predetermined wall portion 61 are laterally offset without interfering with each other.

[0037] Preferably, one of the longitudinal walls 52 and 56 has a first mounting feature 76 (e.g., a pair of first mounting features 76) located within the auxiliary space M, and the auxiliary section 70 has a second mounting feature 78 (e.g., a pair of second mounting features 78) for connecting to the first mounting feature 76. For example, one of the first mounting feature 76 and the second mounting feature 78 is a longitudinal protrusion, and the other of the first mounting feature 76 and the second mounting feature 78 is a longitudinal groove for matching with the longitudinal protrusion. Accordingly, a mutual holding and mutual support effect can be formed, which helps the stability of the cylinder 66 and the rod 68 when they extend and retract relative to each other, but the implementation is not limited.

[0038] like Figure 6 As shown ( Figures 6 to 10 (The first skid aid 58, the second skid aid 60, the third skid aid 62, and the fourth skid aid 64 are omitted from the drawing). At least one auxiliary feature 80 (e.g., a protrusion) is arranged on the fourth track 28. The cylinder 66 abuts against the first predetermined wall portion 61 through the mounting portion 71 (this part can be referred to in conjunction with the drawing). Figure 5The extension 43 extends beyond the first end 26a of the third track 26 by a certain distance (this part can be referred to in conjunction with other documents). Figure 5 ).

[0039] When the second rail 24, the fourth rail 28, the third rail 26, and the fifth rail 30 of the slide rail assembly 20 are displaced relative to the first rail 22 in an opening direction D1, during the final stroke of the slide rail assembly 20 in an extended state, the auxiliary feature 80 on the fourth rail 28 pushes against the auxiliary section 70 of the damping device 38, causing the rod 68 to retract relative to the cylinder 66 to provide a buffering effect until the slide rail assembly 20 is in the extended state (e.g., fully extended state). At this time, the auxiliary section 70 moves away from the second predetermined wall portion 63 and fails to abut against the second predetermined wall portion 63.

[0040] Furthermore, when the slide rail assembly 20 is in the extended state, the first end 28a of the fourth rail 28 extends beyond the first end 26a of the third rail 26, the second rail 24 is in an extended position E, and the first end 24a of the second rail 24 extends beyond the first end 28a of the fourth rail 28. Preferably, the first end 30a of the fifth rail 30 extends beyond the first end 22a of the first rail 22, and the first end 26a of the third rail 26 extends beyond the first end 30a of the fifth rail 30.

[0041] Preferably, the stop 36 is in a first state S1 in response to the elastic force of the elastic member 42. Here, the elastic member 42 has two elastic parts that are respectively connected to a first support feature 82 of the fourth rail 28 and a second support feature 84 of the stop 36.

[0042] Preferably, the fourth rail 28 can support the stop 36 in the first state S1.

[0043] Preferably, when the slide rail assembly 20 is in the extended state, the stop 36 and the release member 32 have a predetermined longitudinal distance from each other.

[0044] Preferably, the release member 32 includes a guide portion 86, which is, for example, a sloped surface or a curved surface, but is not limited in implementation (this part can be referred to in conjunction with the following). Figure 1 ).

[0045] Preferably, the release member 32 further includes a first gap G1 and a second gap G2, and the guide portion 86 is located between the first gap G1 and the second gap G2 (this part can be referred to in conjunction with the previous section). Figure 1 ).

[0046] like Figure 7As shown, when the second rail 24 moves from the extended position E to a retracting direction D2 to a predetermined stroke, such as the final stroke, a part of the second rail 24 (e.g., the second end 24b) contacts the stop 36 in the first state S1, causing the second rail 24 and the fourth rail 28 to move synchronously in the retracting direction D2, and the second rail 24 cannot retract relative to the fourth rail 28. At this time, a predetermined distance Q is maintained between the first end 24a of the second rail 24 and the first end 28a of the fourth rail 28.

[0047] Preferably, when the second rail 24 and the fourth rail 28 move synchronously in the retraction direction D2, the auxiliary feature 80 on the fourth rail 28 no longer pushes against the auxiliary section 70 of the damping device 38, so that the rod 68 can extend relative to the cylinder 66 through the aforementioned buffer medium and / or auxiliary elastic member inside the cylinder 66. At this time, the damping device 38 is in the buffer preparation state, and the auxiliary section 70 abuts against the second predetermined wall portion 63.

[0048] like Figures 8 to 10 As shown, when the second rail 24 and the fourth rail 28 continue to move synchronously in the retraction direction D2, until the stop 36 contacts the guide part 86 of the release member 32, the stop 36 is driven by the guide part 86 of the release member 32 from the first state S1 (as shown). Figure 8 As shown, it moves (e.g., pivots) in a predetermined direction r to a second state S2 (as shown). Figure 9 As shown), this is used to release the synchronous displacement relationship between the second rail 24 and the fourth rail 28 in the retraction direction D2, so that the second rail 24 can retract relative to the fourth rail 28 to shorten the predetermined distance Q. At this time, the third rail 26, the fourth rail 28, and the fifth rail 30 retract relative to the first rail 22 in the retraction direction D2 (for example, the third rail 26, the fourth rail 28, and the fifth rail 30 are already in the retracted position relative to the first rail 22), so as to allow the auxiliary part 34 on the second rail 24 to push against the extension section 43 of the damping device 38 in the retraction direction D2 (e.g., Figure 9 As shown), the cylinder 66 retracts relative to the rod 68, allowing the damping device 38 to provide a buffering effect until the second rail 24 reaches a retracted position R, causing the slide rail assembly 20 to be in a fully retracted state (as shown). Figure 10 (As shown). Among them, Figure 10 The block 36 in the second state S2 is omitted from the drawing.

[0049] Preferably, the second rail 24 includes a first wall 88a, a second wall 88b, and a longitudinal wall 90 connecting the first wall 88a and the second wall 88b of the second rail 24. When the second rail 24 is in the retracted position R, the first wall 88a and the second wall 88b of the second rail 24 respectively pass through the first gap G1 and the second gap G2 of the release member 32.

[0050] It is worth mentioning that, as described above, when the second rail 24, the fourth rail 28, the third rail 26 and the fifth rail 30 are displaced relative to the first rail 22 from the retracted position to the opening direction D1, so that the slide rail assembly 20 is in the final stroke of the extended state, the auxiliary feature 80 on the fourth rail 28 pushes against the auxiliary section 70 of the damping device 38, so that the rod 68 retracts relative to the cylinder 66 to provide a buffering effect until the slide rail assembly 20 is in the extended state.

[0051] Therefore, the slide rail assembly 20 provided in the embodiments of the present invention includes the following features:

[0052] 1. The slide rail assembly 20 includes three or more slide rails, wherein when the second rail 24, the fourth rail 28, the third rail 26 and the fifth rail 30 are displaced from the extended position relative to the first rail 22 in the retraction direction D2 to a predetermined stroke (e.g., the final stroke), at least three functions can be achieved by the second rail 24 contacting the stop 36 in the first state S1. For example, in the first state S1, the stop 36 can allow the second rail 24 and the fourth rail 28 to move synchronously (i.e., move together) in the closing direction D2; or, in the first state S1, the stop 36 can provide a blocking effect, preventing the second rail 24 from fully closing relative to the fourth rail 28 (e.g., the second rail 24 cannot fully retract or shrink into the fourth rail 28). In this case, a predetermined distance Q is maintained between the first end 24a of the second rail 24 and the first end 28a of the fourth rail 28 as a safety distance, which prevents the user's fingers from being pinched between the first end 24a of the second rail 24 and the first end 28a of the fourth rail 28; or, in the first state S1, the stop 36 can provide a blocking effect, preventing the second rail 24 from fully closing relative to the fourth rail 28 (e.g., the second rail 24 cannot fully retract or shrink into the fourth rail 28). The stop 36 provides a blocking effect, preventing the second rail 24 from retracting relative to the fourth rail 28, thus preventing the second rail 24 from activating the damping device 38. Once the stop 36 is moved from the first state S1 to the second state S2 by the guide part 86 of the release member 32, the synchronous displacement relationship between the second rail 24 and the fourth rail 28 in the retraction direction D2 is released, allowing the second rail 24 to retract relative to the fourth rail 28 to shorten the predetermined distance Q. At this time, the third rail 26 retracts relative to the first rail 22, allowing the auxiliary member 34 on the second rail 24 to push against the damping device 38, so that the damping device 38 provides a buffering effect until the second rail 24 reaches the retracted position R.

[0053] 2. The stop 36 in the first state S1 provides a blocking effect, preventing the second rail 24 from retracting relative to the fourth rail 28, thus preventing the second rail 24 from activating the damping device 38. Only when the stop 36 is moved from the first state S1 to the second state S2 by the guide part 86 of the release member 32, is the auxiliary member 34 on the second rail 24 allowed to push against the damping device 38, allowing the damping device 38 to provide a buffering effect until the second rail 24 reaches the retracted position R. Accordingly, it can be ensured that the damping device 38 provides a buffering effect when the second rail 24, the fourth rail 28, the third rail 26, and the fifth rail 30 retract relative to the first rail 22 in the retracting direction D2. In other words, the damping device 38 will not be activated prematurely before the second rail 24, the fourth rail 28, the third rail 26, and the fifth rail 30 are fully retracted relative to the first rail 22.

[0054] 3. The third rail 26 is composed of a first rail portion 44 and a second rail portion 46 that are interconnected (fixed to each other). The fifth rail 30 is movably installed between the first rail 22 and the first rail portion 44 of the third rail 26, and the fourth rail 28 is movably installed between the second rail portion 46 of the third rail 26 and the second rail 24.

[0055] 4. When the second rail 24, the fourth rail 28, the third rail 26 and the fifth rail 30 move relative to the first rail 22 from the closed position to the opening direction D1, or from the extended position to the closed direction D2, the damping device 38 can be activated to provide a buffering effect.

[0056] Although the present invention has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are merely illustrative of the invention, and various equivalent changes and modifications can be made without departing from the spirit of the invention. Therefore, any changes or modifications to the above embodiments within the scope of the essential spirit of the invention will fall within the scope of the claims of this application.

Claims

1. A slide rail assembly, comprising a first rail, a second rail, a third rail, and a fourth rail, characterized in that: The first rail, the second rail, the third rail, and the fourth rail can be longitudinally displaced relative to each other, wherein the third rail is located between the first rail and the second rail, and the fourth rail is located between the third rail and the second rail, wherein the first rail, the second rail, the third rail, and the fourth rail each have a first end and a second end that are positioned opposite each other; The slide rail assembly also includes: One release piece is arranged to be placed on the first track; An auxiliary component is placed on the second track; One stop is movably installed onto the fourth rail; and A damping device is installed on the third rail; When the slide rail assembly is in an extended state, the first end of the fourth rail extends beyond the first end of the third rail, and the second rail is in an extended position with the first end of the second rail extending beyond the first end of the fourth rail. During the process of the second rail moving from the extended position to the end of the stroke in a retracting direction, the second rail contacts the stop in a first state, causing the second rail and the fourth rail to move synchronously in the retracting direction. At this time, a predetermined distance is maintained between the first end of the second rail and the first end of the fourth rail. Specifically, when the second rail and the fourth rail continue to move synchronously in the closing direction until the stop member contacts the release member, the stop member is driven to move from the first state to a second state, thereby releasing the synchronous displacement relationship between the second rail and the fourth rail in the closing direction, shortening the predetermined distance, and allowing the auxiliary member of the second rail to push against the damping device, so that the damping device provides a buffering effect until the second rail reaches a closing position.

2. The slide rail assembly according to claim 1, characterized in that, It also includes a fifth rail located between the first rail and the third rail, the fifth rail having a first end and a second end that are opposite each other; when the slide rail assembly is in the extended state, the first end of the fifth rail extends beyond the first end of the first rail, and the first end of the third rail extends beyond the first end of the fifth rail.

3. The slide rail assembly according to claim 2, characterized in that, The third rail has a first rail portion and a second rail portion; the fifth rail is movably installed between the first rail and the first rail portion of the third rail, and the fourth rail is movably installed between the second rail portion of the third rail and the second rail.

4. The slide rail assembly according to claim 3, characterized in that, The first and second rail portions of the third rail are arranged opposite to each other, and each of the first and second rail portions includes a first wall, a second wall, and a longitudinal wall connected between the first and second walls; the longitudinal wall of the first rail portion is connected to the longitudinal wall of the second rail portion.

5. The slide rail assembly according to claim 1, characterized in that, The release element is located at the second end adjacent to the first track.

6. The slide rail assembly according to claim 1, characterized in that, The auxiliary component is located at the first end adjacent to the second track.

7. The slide rail assembly according to claim 1, characterized in that, The stop is pivotally connected to the fourth rail, and the rail assembly further includes an elastic member for providing elastic force to the stop.

8. The slide rail assembly according to claim 1, characterized in that, The stop is located at the second end of the adjacent fourth track.

9. The slide rail assembly according to claim 3, characterized in that, The damping device is arranged with an extension extending from the first end of the third rail, and the extension is used for the auxiliary member of the second rail to push against the damping device, so that the damping device provides a buffering effect until the second rail reaches the retracted position.

10. The slide rail assembly according to claim 1, characterized in that, During the process of the second rail, the fourth rail and the third rail moving relative to the first rail in an opening direction to the end of the stroke, the fourth rail pushes against the damping device through at least one auxiliary feature, so that the damping device provides a buffering effect until the slide rail assembly is in the extended state.

11. A slide rail assembly, comprising a first rail, a second rail, and a third rail, wherein, The third rail is located between the first rail and the second rail, and the second rail and the third rail are longitudinally displaceable relative to the first rail, characterized in that: The slide rail assembly also includes: An auxiliary component is arranged on the second track; and A damping device is installed on the third rail; During the process of the second rail moving from an extended position to a retracting direction, the third rail retracts relative to the first rail in the retracting direction, and the auxiliary component of the second rail pushes against the damping device, so that the damping device provides a buffering effect.

12. The slide rail assembly according to claim 11, characterized in that, It also includes a fourth rail and a fifth rail; the third rail has a first rail portion and a second rail portion that are interconnected; the fifth rail is movably installed between the first rail and the first rail portion of the third rail, and the fourth rail is movably installed between the second rail portion of the third rail and the second rail.

13. The slide rail assembly according to claim 12, characterized in that, The first and second sections of the third track each include a first wall, a second wall, and a longitudinal wall connected between the first and second walls; the longitudinal wall of the first track section and the longitudinal wall of the second track section are fixedly connected to each other.

14. The slide rail assembly according to claim 12, characterized in that, It also includes a stop member movably installed to the fourth rail, and the first rail, the second rail, the third rail, the fourth rail, and the fifth rail each have a first end and a second end positioned opposite each other; wherein, when the slide rail assembly is in an extended state, the first end of the fourth rail extends beyond the first end of the third rail, the second rail is in the extended position, and the first end of the second rail extends beyond the first end of the fourth rail; wherein, when the second rail moves from the extended position to the retracting direction, the second rail contacts the stop member in a first state, causing the second rail and the fourth rail to move synchronously in the retracting direction, and a predetermined distance is maintained between the first end of the second rail and the first end of the fourth rail.

15. The slide rail assembly according to claim 14, characterized in that, It also includes a release member arranged to the first rail; when the second rail and the fourth rail continue to move synchronously in the closing direction until the stop member contacts the release member, the stop member is driven to move from the first state to a second state, so as to release the synchronous displacement relationship between the second rail and the fourth rail in the closing direction, so as to allow the auxiliary member of the second rail to push against the damping device, so that the damping device provides a buffering effect until the second rail reaches a closed position.

16. The slide rail assembly according to claim 15, characterized in that, The release element is located at the second end adjacent to the first track.

17. The slide rail assembly according to claim 12, characterized in that, The auxiliary component is located at the first end adjacent to the second track.

18. The slide rail assembly according to claim 14, characterized in that, The stop is pivotally connected to the fourth rail, and the rail assembly further includes an elastic member for providing elastic force to the stop.

19. The slide rail assembly according to claim 15, characterized in that, The damping device is arranged with an extension extending from the first end of the third rail, and the extension is used for the auxiliary member of the second rail to push against the damping device, so that the damping device provides a buffering effect until the second rail reaches the retracted position.

20. The slide rail assembly according to claim 12, characterized in that, The first and second sections of the third track are arranged opposite to each other.

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