TWI890648B - Slide rail assembly - Google Patents

Abstract

A slide rail assembly includes a first rail, a second rail, a third rail, a blocking member, an auxiliary member and a damping device. The first, second and third rails are displaceable with respect to one another. The third rail is located between the first rail and the second rail. The auxiliary member is arranged at the second rail. The damping device is arranged at the third rail. When the second rail is displaced from an extending position toward a retracting direction, the damping device cannot be activated by the auxiliary member until the blocking member is moved.

Description

Slide rail assembly

The present invention relates to a slide rail mechanism, and more particularly to a slide rail assembly having multiple slide rails.

For example, U.S. Patent Publication No. US 6,860,575B2 discloses a safety device for a sliding rail, comprising an outer rail, a middle rail, an inner rail, and a stopper pivoted on the middle rail; the outer rail is provided with a protrusion; the middle rail is provided with a convex portion and a slot; an elastic plate is provided between the stopper and the convex portion of the middle rail; the stopper is provided with a safety protrusion spaced a distance from the end of the middle rail and corresponding to and abutting against the end of the inner rail, and the stopper is also provided with an unlocking protrusion that extends into the slot of the middle rail and pushes against the protrusion of the outer rail to pivot the stopper. With this configuration, as the inner rail opens and retracts, the upper edge of the inner rail abuts against the safety bump, causing the inner rail and the middle rail to move synchronously toward the retraction direction. This creates a safe distance between the front ends of the inner rail and the middle rail, providing a pinch-proof space. This safety distance prevents accidental pinching of the user's fingers. As the inner rail and middle rail retract further, the retaining member pivots due to the release bump being pushed against the outer rail tab. This pivoting action releases the safety bump from the upper edge of the inner rail, allowing the inner rail to fully retract into the middle rail.

However, as market demands vary, how to develop a different type of slideway product becomes an issue worth exploring.

The present invention relates to a multi-section slide rail assembly that has a buffering function when retracting.

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 stopper, 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 the first rail, the second rail, the third rail and the fourth rail all have a first end and a second end that are positioned opposite each other; the release member is arranged to the first rail; the auxiliary member is arranged to the second rail; the blocker 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 exceeds the first end of the third rail, the second rail is in an extended position and the first end of the second rail exceeds the first end of the fourth rail; wherein, when the second rail is extended from During the process of moving the extended position toward the retracted direction to the final stage of travel, the second rail contacts the stopper in the first state, causing the second rail and the fourth rail to move synchronously toward the retracted 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 toward the retracted direction, The stopper moves until it contacts the release member, causing the stopper 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 retracted direction, shortening the predetermined distance, and allowing the auxiliary member of the second rail to push against the damping device, causing the damping device to provide a cushioning effect until the second rail reaches a retracted position.

According to another aspect of the present invention, a slide rail assembly includes a first rail, a second rail, a third rail, an auxiliary member, 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, wherein the first rail, the second rail, and the third rail each have a first end and a second end that are positioned opposite each other. The auxiliary member is arranged on the second rail, and the damping device is arranged on the third rail. When the second rail moves from an extended position to a retracted direction, the third rail retracts relative to the first rail in the retracted direction, and the auxiliary member of the second rail pushes against the damping device, causing the damping device to provide a cushioning effect.

Overall, the multi-section rails of the rail assembly provide a cushioning function when retracted. Preferably, when the second rail is displaced toward the retracted position, the damping device is activated by the second rail and provides a cushioning effect, driven by the baffle.

20: Slide rail assembly

22: Track 1

22a, 24a, 26a, 28a, 30a: First end

22b, 24b, 26b, 28b, 30b: Second end

24: Second Track

26: Third Track

28: Track 4

30: Fifth Track

32: Release piece

34: Auxiliary parts

36: Blocker

38: Damping device

40:shaft

42: Elastic parts

43: Extension

44: First track

46: Second track

48: Connection characteristics

50a, 54a, 88a: First Wall

50b, 54b, 88b: Second Wall

52,56,90: Vertical Wall

58: First sliding aid device

60: Second sliding aid

61: First predetermined wall portion

62: Third Sliding Assist Device

63: Second predetermined wall portion

64: Fourth Sliding Assist Device

66: Cylinder body

68: Rod

70: Auxiliary Section

71: Installation Department

72: First scheduled end

74: Second scheduled end

75: Reserved wall

76: First installation feature

78: Second installation features

80: Auxiliary characteristics

82: Characteristics of the First Support

84: Second support features

86: Guidance Department

B1: First Roller

B2: Second Roller

B3: Third Roller

B4: Fourth Roller

D1: Open direction

D2: Folding direction

E: Extended position

G1: First Gap

G2: Second Gap

J: Extended distance

K, K’: Channel

M: Auxiliary space

N: Reserved space

Q: Predetermined distance

r:Predetermined direction

R: Folded position

S1: First State

S2: Second State

T1: First lateral

T2: Second lateral

FIG1 shows a schematic perspective view of a slide rail assembly comprising multiple slide rail sections according to an embodiment of the present invention.

Figure 2 shows a three-dimensional schematic diagram of a slide rail assembly comprising multiple slide rail sections according to one embodiment of the present invention from another perspective;

Figure 3 shows a schematic cross-sectional view of a slide rail assembly according to one embodiment of the present invention;

Figure 4 shows an exploded schematic diagram of a slide rail and a damping device of a slide rail assembly according to one embodiment of the present invention;

Figure 5 shows a schematic diagram of the combination of the slide rail and the damping device of the slide rail assembly according to one embodiment of the present invention;

Figure 6 shows a schematic diagram of the slide rail assembly in an extended state according to one embodiment of the present invention;

Figure 7 shows a schematic diagram of the slide rail of the slide rail assembly according to one embodiment of the present invention moving in a retracting direction;

Figure 8 shows a schematic diagram of the slide rail assembly of one embodiment of the present invention continuing to move in the retracting direction;

Figure 9 shows a schematic diagram of the slide rail assembly of one embodiment of the present invention further displaced toward the retracting direction; and

Figure 10 shows a schematic diagram of the slide rail assembly in a retracted state according to one embodiment of the present invention.

As shown in Figures 1 and 2, a rail assembly 20 according to one embodiment of the present invention includes a first rail 22, a second rail 24, 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 is the longitudinal direction (or the length of the rail), the Y-axis is the transverse direction (or the side direction of the rail), and the Z-axis is the vertical direction (or the height direction of the rail).

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, the first rail 22, the second rail 24, the third rail 26, the fourth rail 28, and the fifth rail 30 all have a first end and a second end that are positioned relative to each other, such as a front end and a rear end, but this is not a limitation in practice. 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.

The slide rail assembly 20 further includes a release member 32, an auxiliary member 34, a stopper 36, and a damping device 38.

The release member 32 is arranged (e.g., fixed) to the first rail 22. Preferably, the release member 32 is located adjacent to the second end 22b of the first rail 22.

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

The baffle 36 is movably mounted to the fourth rail 28 . Preferably, the baffle 36 is located adjacent to the second end 28b of the fourth rail 28 . Furthermore, the baffle 36 is pivotally connected to the fourth rail 28 via a shaft 40 , and the slide rail assembly 20 further includes an elastic member 42 for providing elastic force to the baffle 36 . The elastic member 42 is, for example, a torsion spring; alternatively, in other alternative embodiments, the elastic member 42 may be an elastic object such as a spring or a spring, and the embodiment is not limited thereto.

The damping device 38 is attached to the third rail 26. The damping device 38 is configured to have an extension 43 extending beyond the first end 26a of the third rail 26 (as shown in FIG. 2 ).

Preferably, the third rail 26 is formed by 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 fixed to each other via at least one connecting feature 48, such as a riveted or clipped connection, but the implementation is not limited thereto (as shown in FIG. 2 ).

As shown in FIG3 , the fifth rail 30 is movably mounted between the first rail 22 and the first rail portion 44 of the third rail 26 , and the fourth rail 28 is movably mounted between the second rail portion 46 of the third rail 26 and the second rail 24 .

Preferably, the first rail portion 44 and the second rail portion 46 of the third rail 26 are arranged in opposite directions relative to each other. The first rail 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 44. The first wall 50a, the second wall 50b, and the longitudinal wall 52 of the first rail 44 jointly define a predetermined space N. The second rail 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 46. The first wall 54a, the second wall 54b, and the longitudinal wall 56 of the second rail 46 jointly 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 (see Figure 2 for details). Furthermore, the opening of the predetermined space N of the first rail portion 44 and the opening of the channel K of the second rail portion 46 face opposite directions. For example, the predetermined space N of the first rail portion 44 opens toward a first side T1, while the opening of the channel K of the second rail portion 46 faces a second side T2 opposite the first side T1.

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.

Preferably, the first rail 22 defines a channel K' for accommodating the fifth rail 30, and the fifth rail 30 defines a first supporting channel for accommodating 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, to form a first sliding 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 supporting channel for accommodating 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 an outer rail, a middle rail, and an inner rail, respectively, to form a second rail assembly. Therefore, the rail assembly 20 can be considered two rail assemblies with three rail sections connected together.

Preferably, a plurality of first sliding aid devices 58 (e.g., bead bars) are installed between the first rail 22 and the fifth rail 30, including a plurality of first rollers B1 supported between the first rail 22 and the fifth rail 30, and a second sliding 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, including a plurality of second rollers B2 supported between the fifth rail 30 and the first rail portion 44 of the third rail 26. This facilitates smooth relative displacement between the first rail 22, the fifth rail 30, and the first rail portion 44 of the third rail 26. Furthermore, a plurality of third sliding-assisting devices 62 (e.g., bead bars) are installed between the second rail portion 46 of the third rail 26 and the fourth rail 28. These devices include a plurality of third rollers B3 supported between the second rail portion 46 of the third rail 26 and the fourth rail 28. Furthermore, a fourth sliding-assisting device 64 (e.g., a ball retainer) is installed between the fourth rail 28 and the second rail 24. These devices include a plurality of fourth rollers B4 supported between the fourth rail 28 and the second rail 24. This helps ensure smooth relative displacement between the second rail portion 46 of the third rail 26, the fourth rail 28, and the second rail 24.

As shown in Figures 4 and 5 , the damping device 38 is mounted to one of the first rail portion 44 and the second rail portion 46 of the third rail 26. A longitudinal wall 52 of the first rail portion 44 and a portion of a longitudinal wall 56 of the second rail portion 46 collectively define an auxiliary space M connecting two opposing sides of the third rail 26. The 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.

The damping device 38 includes a cylinder 66 and a rod 68 that can extend and retract relative to each other. The cylinder 66 housing contains a buffering medium, such as a fluid (e.g., oil or liquid). Preferably, the cylinder 66 housing further includes an auxiliary elastic member to provide elastic force to the rod 68 (e.g., a piston rod) and the cylinder 66. Since this section is within the technical scope that can be understood by those skilled in the art, it will not be further elaborated here for the sake of brevity.

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 mounted on oppositely spaced portions of the cylinder 66 and the rod 68, respectively. The extension section 43 is, for example, an extension having a predetermined longitudinal length. The extension section 43 has a mounting portion 71 for mounting (e.g., fastening or snapping) to the exterior of the cylinder 66 housing adjacent to the first predetermined end 72, such that the extension section 43 and the cylinder 66 are considered integral. The auxiliary section 70 is, for example, a block or a column, but is not limited thereto. The auxiliary section 70 is larger than the rod 68 and is mounted (e.g., fixed) to the rod 68 adjacent to the second predetermined end 74, such that the auxiliary section 70 and the rod 68 can be considered integral. Thus, the entire longitudinal length of the damping device 38 can be extended by the extension section 43 and the auxiliary section 70.

Preferably, when the damping device 38 is in a buffer standby state, a predetermined wall surface 75 of the mounting portion 71 is able to abut the first predetermined wall portion 61, and the extension section 43 extends longitudinally from the side of the mounting portion 71 by a predetermined length, wherein the extension section 43 extends beyond the first end 26a of the third rail 26 by a distance J. Meanwhile, the auxiliary section 70 is able to abut the second predetermined wall portion 63.

Preferably, the extension section 43 and the predetermined wall surface 75 are bent perpendicularly relative to each other, so that the extension section 43 and the first predetermined wall portion 61 are laterally offset and do not interfere with each other.

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) connected to the first mounting feature 76. For example, one of the first and second mounting features 76 and 78 may be a longitudinal projection, and the other of the first and second mounting features 76 and 78 may be a longitudinal groove that mates with the longitudinal projection. This creates a mutual holding and supporting effect, which helps stabilize the cylinder 66 and rod 68 during relative extension and contraction, but the embodiment is not limited thereto.

As shown in Figure 6 (Figures 6 to 10 omit the first, second, third, and fourth assisted sliding devices 58, 60, 62, and 64), the fourth rail 28 is provided with at least one auxiliary feature 80 (e.g., a protrusion); the cylinder 66 abuts against the first predetermined wall portion 61 via the mounting portion 71 (see Figure 5 for details); and the extension section 43 extends beyond the first end 26a of the third rail 26 by a distance (see Figure 5 for details).

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 the opening direction D1, bringing the slide rail assembly 20 into the final extended position, 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, providing a cushioning effect until the slide rail assembly 20 reaches the extended position (e.g., fully extended). At this point, the auxiliary section 70 is spaced away from the second predetermined wall portion 63 and fails to abut against it.

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.

Preferably, the baffle 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 portions, one connected to a first supporting feature 82 of the fourth rail 28 and the other to a second supporting feature 84 of the baffle 36.

Preferably, the fourth rail 28 can support the blocker 36 in the first state S1.

Preferably, when the slide rail assembly 20 is in the extended state, the blocking member 36 and the release member 32 have a predetermined longitudinal distance therebetween.

Preferably, the release member 32 includes a guide portion 86, which may be a sloped surface or a curved surface, but the embodiment is not limited thereto (please refer to FIG. 1 for details).

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 (refer to Figure 1 for details).

As shown in Figure 7, when the second rail 24 moves from the extended position E in the retracting direction D2 to a predetermined stroke, such as the final stroke, a portion of the second rail 24 (e.g., the second end 24b) contacts the stopper 36 in the first state S1, causing the second rail 24 and the fourth rail 28 to move synchronously in the retracting direction D2. The second rail 24 is unable to 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.

Preferably, when the second rail 24 and the fourth rail 28 are synchronously displacing in the retracting direction D2, the auxiliary feature 80 on the fourth rail 28 no longer pushes against the auxiliary section 70 of the damping device 38, allowing the rod 68 to extend relative to the cylinder 66 through the aforementioned buffering medium and/or auxiliary elastic member within the cylinder 66. At this point, the damping device 38 is in the buffering standby state, and the auxiliary section 70 abuts the second predetermined wall portion 63.

As shown in Figures 8 to 10, when the second rail 24 and the fourth rail 28 continue to move synchronously in the retracting direction D2, until the block 36 contacts the guide portion 86 of the release member 32, the block 36 is driven by the guide portion 86 of the release member 32 to move (for example, pivot) from the first state S1 (as shown in Figure 8) to a predetermined direction r to a second state S2 (as shown in Figure 9), thereby releasing the synchronous displacement relationship of the second rail 24 and the fourth rail 28 in the retracting direction D2, so that the second rail 24 can be retracted relative to the fourth rail 28 to shorten the predetermined distance Q. At this time, the second rail 24 is retracted relative to the fourth rail 28 to shorten the predetermined distance Q. The third rail 26, the fourth rail 28, and the fifth rail 30 retract relative to the first rail 22 in the retracted 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). This allows the auxiliary member 34 on the second rail 24 to push against the extension 43 of the damping device 38 in the retracted direction D2 (as shown in FIG. 9 ), causing the cylinder 66 to retract relative to the rod 68, allowing the damping device 38 to provide a cushioning effect until the second rail 24 reaches a retracted position R, bringing the slide rail assembly 20 into a fully retracted state (as shown in FIG. 10 ). FIG. 10 omits the stopper 36 in the second state S2.

Preferably, the second rail 24 includes a first wall 88a, a second wall 88b, and a longitudinal wall 90 connected between 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 penetrate the first gap G1 and the second gap G2 of the release member 32.

It is worth noting that, as described above, 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 retracted position toward the open direction D1, causing the slide rail assembly 20 to reach the final stage of its extended position, 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, thereby providing a cushioning effect until the slide rail assembly 20 reaches the extended position.

It can be seen that the slide rail assembly 20 provided in the embodiment of the present invention includes the following features:

1. The slide rail assembly 20 includes three or more slide rails. When the second rail 24, the fourth rail 28, the third rail 26, and the fifth rail 30 move from an extended position relative to the first rail 22 in the retracted direction D2 to a predetermined stroke (e.g., the final stroke), at least three functions are achieved by the second rail 24 contacting the blocker 36 in the first state S1. For example, the blocker 36 in the first state S1 may cause the second rail 24 and the fourth rail 28 to move synchronously in the retraction direction D2 (i.e., move together); or, the blocker 36 in the first state S1 may provide a blocking effect, preventing the second rail 24 from fully retracting relative to the fourth rail 28 (e.g., the second rail 24 cannot be fully retracted or retracted into the fourth rail 28). In this case, the first end 24a of the second rail 24 and the first end 28a of the fourth rail 28 maintain a predetermined distance Q as a safety distance, thereby preventing a 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, the blocker 36 in the first state S1 may provide a blocking effect, preventing the second rail 24 from fully retracting relative to the fourth rail 28 (e.g., the second rail 24 cannot be fully retracted or retracted into the fourth rail 28). The blocker 36 can provide a blocking effect, so that the second rail 24 cannot be retracted relative to the fourth rail 28, so that the second rail 24 cannot activate the damping device 38. Once the blocker 36 is driven by the guide portion 86 of the release member 32 and moves from the first state S1 to the second state S2, the second rail 24 and the fourth rail 28 can be released from the retraction state. The synchronous displacement in direction D2 allows 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, causing the damping device 38 to provide a cushioning effect until the second rail 24 reaches the retracted position R.

2. The blocker 36 in the first state S1 provides a blocking effect, preventing the second rail 24 from retracting relative to the fourth rail 28, so that the second rail 24 cannot activate the damping device 38. Only when the blocker 36 is driven by the guide portion 86 of the release member 32 and moves from the first state S1 to the second state S2, the auxiliary member 34 on the second rail 24 is allowed to push against the damping device 38, so that the damping device 38 provides a buffering effect. The damping device 38 does not provide a cushioning effect until the second rail 24 reaches the retracted position R. This ensures that the damping device 38 provides a cushioning effect only when the second rail 24, the fourth rail 28, the third rail 26, and the fifth rail 30 are retracted relative to the first rail 22 in the retracting direction D2. In other words, the damping device 38 will not be prematurely activated 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.

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

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 retracted position toward the opening direction D1, or from the extended position toward the retracted direction D2, the damping device 38 can be activated to provide a cushioning effect.

Although the present invention has been disclosed in the aforementioned preferred embodiments, they are not intended to limit the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of the attached patent application.

20: Slide rail assembly

22: Track 1

22a, 24a, 26a, 28a, 30a: First end

22b, 24b, 26b, 28b, 30b: Second end

24: Second Track

26: Third Track

28: Track 4

30: Fifth Track

32: Release piece

34: Auxiliary parts

36: Blocker

40:shaft

42: Elastic parts

46: Second track

54a: First Wall

54b: Second Wall

56: Vertical Wall

82: Characteristics of the First Support

84: Second support features

86: Guidance Department

G1: First Gap

G2: Second Gap

S1: First State

Claims (20)

A slide rail assembly comprising: A first rail, a second rail, a third rail, and a 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 the first rail, the second rail, the third rail, and the fourth rail each have a first end and a second end positioned opposite each other; A release member is arranged on the first rail; An auxiliary member is arranged on the second track; A stopper movably mounted to the fourth rail; and A damping device is arranged 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 when the second rail is in an extended position, the first end of the second rail extends beyond the first end of the fourth rail. When the second rail moves from the extended position toward a retracted direction to the final stage of its travel, the second rail contacts the stopper in a first state, causing the second rail and the fourth rail to move synchronously toward the retracted 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 stopper contacts the release member, the stopper is driven to move from the first state to a second state, thereby releasing the synchronous displacement of the second rail and the fourth rail in the retracting direction, shortening the predetermined distance, and allowing the auxiliary member of the second rail to push against the damping device, causing the damping device to provide a cushioning effect until the second rail reaches a retracted position. The slide rail assembly of claim 1 further comprises a fifth rail positioned between the first rail and the third rail, the fifth rail having a first end and a second end positioned 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. The slide rail assembly of claim 2, wherein the third rail has a first rail portion and a second rail portion; the fifth rail is movably mounted between the first rail and the first rail portion of the third rail; and the fourth rail is movably mounted between the second rail portion of the third rail and the second rail. The slide rail assembly as described in claim 3, wherein the first rail portion and the second rail portion of the third rail are arranged in opposite directions relative to each other, and each of the first rail portion and the second rail portion includes a first wall, a second wall, and a longitudinal wall connected between the first wall and the second wall; the longitudinal wall of the first rail portion and the longitudinal wall of the second rail portion are connected to each other. The slide rail assembly as claimed in claim 1, wherein the release member is located adjacent to the second end of the first rail. The slide rail assembly as claimed in claim 1, wherein the auxiliary member is located adjacent to the first end of the second rail. The slide rail assembly of claim 1, wherein the baffle is pivotally connected to the fourth rail, and the slide rail assembly further includes an elastic member for providing elastic force to the baffle. The slide rail assembly of claim 1, wherein the blocker is located adjacent to the second end of the fourth rail. The slide rail assembly of claim 3, wherein the damping device is arranged to have 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 cushioning effect until the second rail reaches the retracted position. The slide rail assembly of claim 1, wherein: during the movement of the second rail, the fourth rail, and the third rail relative to the first rail in an opening direction to the final travel, the fourth rail pushes against the damping device via at least one auxiliary feature, causing the damping device to provide a cushioning effect until the slide rail assembly is in the extended state. A slide rail assembly comprising: A first rail, a second rail, and a third rail are longitudinally displaceable relative to each other, wherein the third rail is located between the first rail and the second rail; An auxiliary member is arranged on the second track; and A damping device is arranged on the third rail; When the second rail moves from an extended position toward a retracted direction, the third rail retracts relative to the first rail in the retracted direction, and the auxiliary member of the second rail pushes against the damping device, causing the damping device to provide a cushioning effect. The slide rail assembly of claim 11 further comprises a fourth rail and a fifth rail; the third rail has a first rail portion and a second rail portion connected to each other; the fifth rail is movably mounted between the first rail and the first rail portion of the third rail, and the fourth rail is movably mounted between the second rail portion of the third rail and the second rail. The sliding rail assembly of claim 12, wherein the first rail portion and the second rail portion of the third rail each include a first wall, a second wall, and a longitudinal wall connected between the first wall and the second wall; the longitudinal wall of the first rail portion and the longitudinal wall of the second rail portion are fixedly connected to each other. The slide rail assembly of claim 12 further comprises a stopper movably mounted 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, and when the second rail is in the extended position, 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 toward the retracted direction, the second rail contacts the stopper in the first state, causing the second rail and the fourth rail to move synchronously toward the retracted direction, with a predetermined distance maintained between the first end of the second rail and the first end of the fourth rail. The slide rail assembly of claim 14 further includes a release member disposed on the first rail; when the second rail and the fourth rail continue to synchronously displace in the retracting direction until the stopper contacts the release member, the stopper 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 retracting direction and allowing the auxiliary member of the second rail to push against the damping device, causing the damping device to provide a cushioning effect until the second rail reaches a retracted position. The slide rail assembly of claim 15, wherein the release member is located adjacent to the second end of the first rail. The slide rail assembly of claim 12, wherein the auxiliary member is located adjacent to the first end of the second rail. The slide rail assembly of claim 14, wherein the baffle is pivotally connected to the fourth rail, and the slide rail assembly further includes an elastic member for providing elastic force to the baffle. The slide rail assembly of claim 15, wherein the damping device is arranged to have an extension extending from the first end of the third rail, and the extension is configured to allow the auxiliary member of the second rail to push against the damping device, so that the damping device provides a cushioning effect until the second rail reaches the retracted position. The slide rail assembly as claimed in claim 12, wherein the first rail portion and the second rail portion of the third rail are arranged in opposite directions relative to each other.