CN117918655A - Sliding rail assembly - Google Patents

Abstract

The invention relates to a sliding rail assembly, which comprises a first rail, a second rail, a sliding assisting device and a retaining piece. The second rail is movably arranged in a channel of the first rail, and the second rail can be displaced relative to the first rail; the sliding assisting device is movably arranged between the first rail and the second rail and comprises a clamping feature; the retainer is arranged on the first rail and comprises an elastic part; the resilient portion of the retainer includes a predetermined feature and the first rail includes a limiting feature. The limiting feature is used for preventing the elastic part from deforming due to stress; when the second rail is displaced towards an opening direction relative to the first rail and is detached from the channel of the first rail, the sliding assisting device is positioned at a preset position, and the sliding assisting device can be clamped to the preset feature of the retaining piece through the clamping feature.

Description

Sliding rail assembly

Technical Field

The invention relates to a sliding rail assembly with reliability in use.

Background

For example, U.S. patent publication No. US 6,851,773B2 discloses a slide-assisting positioning structure of a drawer slide, which comprises a first rail, a second rail, a slide-assisting member and a positioning member. The sliding assisting piece is movably arranged between the first rail and the second rail, and the front end of the sliding assisting piece is provided with a clamping groove; the positioning piece is arranged at the passage opening of the first rail. When the second rail is displaced towards an opening direction relative to the first rail and is detached from the channel of the first rail, the positioning piece can be clamped to the clamping groove of the sliding assisting piece through the (hook part of the) elastic hook rod, so that the sliding assisting piece is prevented from sliding randomly relative to the first rail, and the supporting property or the stability of the second rail in the channel of the first rail is facilitated.

Although the above patent discloses related technical features of the sliding member positioning structure, how to develop a sliding rail product with different requirements and improved reliability becomes a non-negligible issue.

Disclosure of Invention

The invention aims to provide a sliding rail assembly with reliability.

According to one aspect of the present invention, a slide rail assembly includes a first rail, a second rail, a sliding aid, and a retaining member. The first rail includes a channel; the second rail is movably arranged in the passage of the first rail, and can longitudinally displace relative to the first rail; the sliding assisting device is movably arranged between the first rail and the second rail and comprises a clamping feature; the retainer is arranged on the first rail, and comprises an elastic part; wherein the elastic portion of the retainer comprises a predetermined feature, the first rail comprises a limiting feature, and the limiting feature is used for preventing the elastic portion from moving in a transverse direction; when the second rail is displaced towards an opening direction relative to the first rail and is detached from the channel of the first rail, the sliding assisting device is positioned at a preset position, and the sliding assisting device can be clamped to the preset feature of the elastic part of the retainer through the clamping feature.

Preferably, one of the predetermined feature and the limiting feature is a space, and the other of the predetermined feature and the limiting feature is a protrusion; the convex part is used for extending into the space.

Preferably, the space is a hole, and the hole is defined by a plurality of hole walls.

Preferably, the first rail comprises a first wall, a second wall and a longitudinal wall, the longitudinal wall is connected between the first wall and the second wall of the first rail, and the first wall, the second wall and the longitudinal wall of the first rail jointly define the channel; the holder further comprises a body portion connected to the longitudinal wall of the first rail, the resilient portion having a first end section and a second end section, the first end section of the resilient portion being connected to the body portion, and the predetermined feature being arranged at the second end section of the resilient portion.

Preferably, the second end section of the elastic portion includes a first guiding feature and a second guiding feature; the predetermined feature is arranged between the first guide feature and the second guide feature.

Preferably, the main body of the holder has a supporting section for supporting the elastic portion.

Preferably, the predetermined feature has a size substantially greater than the size of the detent feature.

Preferably, the second rail includes a release feature; when the second rail is reinserted into the channel of the first rail from the outside of the channel of the first rail to a folding direction, the second rail can drive the elastic part of the retainer through the release feature, so that the clamping feature of the sliding assisting device is released from the preset feature of the elastic part of the retainer to allow the sliding assisting device to move from the preset position to the folding direction.

Preferably, the sliding assisting device further comprises a first portion, a second portion and a longitudinal portion, wherein the longitudinal portion is connected between the first portion and the second portion, and the first portion, the second portion and the longitudinal portion respectively correspond to the first wall, the second wall and the longitudinal wall of the first rail; the first part and the second part of the sliding assisting device are respectively provided with a plurality of balls for respectively supporting the first wall and the second wall of the first rail.

Preferably, the locking feature of the sliding assisting device is a locking hook.

According to another aspect of the present invention, a slide rail assembly includes a first rail, a second rail, a sliding aid, and a retaining member. The first rail comprises a first wall, a second wall and a longitudinal wall, wherein the longitudinal wall is connected between the first wall and the second wall of the first rail, and the first wall, the second wall and the longitudinal wall of the first rail jointly define a channel; the second rail is movably arranged in the passage of the first rail, and can longitudinally displace relative to the first rail; the sliding assisting device is movably arranged between the first rail and the second rail and comprises a clamping feature; the retainer is arranged on the longitudinal wall of the first rail, and the retainer comprises an elastic part; the elastic part of the retainer comprises a space, the longitudinal wall of the first rail comprises a convex part, and the convex part is used for extending into the space; when the second rail is displaced towards an opening direction relative to the first rail and is detached from the channel of the first rail, the sliding assisting device stretches into the space of the elastic part of the retainer through the clamping feature so as to prevent the sliding assisting device from being displaced randomly relative to the first rail.

Preferably, the space is a hole, and the hole is defined by a plurality of hole walls.

Preferably, the holder further comprises a body portion connected to the longitudinal wall of the first rail, the elastic portion has a first end section and a second end section, the first end section of the elastic portion is connected to the body portion, and the space is arranged at the second end section of the elastic portion.

Preferably, the second end section of the elastic portion includes a first guiding feature and a second guiding feature; the space is arranged between the first guide feature and the second guide feature.

Preferably, the main body of the holder has a supporting section for supporting the elastic portion.

Preferably, the size of the space is substantially larger than the size of the detent feature.

Preferably, the second rail includes a release feature; when the second rail is reinserted into the channel of the first rail from the outside of the channel of the first rail to a folding direction, the second rail can drive the elastic part of the retainer through the release feature, so that the clamping feature of the sliding assisting device is released from the space of the elastic part of the retainer to allow the sliding assisting device to move from a preset position to the folding direction.

Preferably, the sliding assisting device further comprises a first portion, a second portion and a longitudinal portion, wherein the longitudinal portion is connected between the first portion and the second portion, and the first portion, the second portion and the longitudinal portion respectively correspond to the first wall, the second wall and the longitudinal wall of the first rail; the first part and the second part of the sliding assisting device are respectively provided with a plurality of balls for respectively supporting the first wall and the second wall of the first rail.

Preferably, the locking feature of the sliding assisting device is a locking hook.

Preferably, the elastic part of the retainer is provided with an extension section adjacent to the space, and when the sliding assisting device extends into the space of the elastic part of the retainer through the clamping feature, the clamping feature corresponds to the extension section.

Drawings

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

Fig. 1 is a schematic perspective view of a slide assembly according to an embodiment of the invention.

Fig. 2 shows an exploded view of a slide assembly according to an embodiment of the invention.

Fig. 2A is a schematic view of a retaining member of a sliding rail assembly according to an embodiment of the invention.

Fig. 3 is a schematic view of a first rail of the sliding rail assembly according to the embodiment of the invention.

Fig. 4 shows a schematic view of a second rail of the sliding rail assembly according to the embodiment of the invention displaced in an opening direction relative to the first rail.

Fig. 5 shows a schematic diagram of the second rail of the sliding rail assembly according to the embodiment of the invention moving in the opening direction relative to the first rail.

Fig. 6 shows a schematic view of the second rail of the sliding rail assembly according to the embodiment of the invention further displaced in the opening direction relative to the first rail.

Fig. 7 shows a schematic view of the sliding rail assembly according to the embodiment of the invention, in which the first rail is in an extended position relative to the third rail, and the second rail is detached from the first rail in the opening direction.

Fig. 8 is a schematic view showing the second rail of the sliding rail assembly reinserting into the channel of the first rail in a folding direction according to the embodiment of the invention.

Fig. 9 is a schematic diagram showing displacement of the second rail of the sliding rail assembly relative to the first rail in the folding direction according to the embodiment of the invention.

Fig. 10 shows a schematic diagram of the second rail of the sliding rail assembly according to the embodiment of the invention moving in the folding direction relative to the first rail.

Fig. 11 is a schematic diagram showing that the second rail of the sliding rail assembly of the embodiment of the invention is further displaced towards the folding direction relative to the first rail.

Detailed Description

As shown in fig. 1 and 2, 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 a retaining member 28. Preferably, a third rail 30 is also included. The first rail 22 is movably mounted between the third rail 30 and the second rail 24, and the first rail 22 can be used to extend the displacement travel of the second rail 24 relative to the third rail 30. In this embodiment, the third rail 30 (e.g., an outer rail), the first rail 22 (e.g., a middle rail), and the second rail 24 (e.g., an inner rail) are longitudinally displaceable relative to one another. As shown in fig. 1, the X-axis is the longitudinal direction (or the length direction of the slide rail), the Y-axis is the transverse direction (or the lateral direction of the slide rail), and the Z-axis is the vertical direction (or the height direction of the slide rail).

The first rail 22 includes a channel 32. Preferably, the first rail 22 includes a first wall 34a, a second wall 34b and a longitudinal wall 36, the longitudinal wall 36 is connected between the first wall 34a and the second wall 34b of the first rail 22, and the first wall 34a, the second wall 34b and the longitudinal wall 36 of the first rail 22 together define the channel 32. The first rail 22 has a front end 22a and a rear end 22b.

The second rail 24 is movably mounted to the channel 32 of the first rail 22, and the second rail 24 is longitudinally displaceable relative to the first rail 22. The second rail 24 includes a first wall 38a, a second wall 38b, and a longitudinal wall 40, the longitudinal wall 40 being connected between the first wall 38a and the second wall 38b of the second rail 24. The second rail 24 includes a release feature 37, such as a protrusion, and the release feature 37 includes a first guide structure 39a and a second guide structure 39b; the first guiding structure 39a and the second guiding structure 39b are an inclined plane or an arc plane, but the implementation is not limited.

The sliding aid 26 is movably mounted between the first rail 22 and the second rail 24, and the sliding aid 26 includes a locking feature 42, for example, a hook 42. Preferably, the sliding assisting device 26 further comprises a first portion 44a, a second portion 44b and a longitudinal portion 46, wherein the longitudinal portion 46 is connected between the first portion 44a and the second portion 44b, and the first portion 44a, the second portion 44b and the longitudinal portion 46 respectively correspond to the first wall 34a, the second wall 34b and the longitudinal wall 36 of the first rail 22; the first portion 44a and the second portion 44b of the sliding assisting device 26 are provided with a plurality of balls 48 (only the balls 48 on the second portion 44b are shown in fig. 1 and 2 due to the view angle), and the balls 48 of the first portion 44a and the balls 48 of the second portion 44b are used for supporting the first wall 34a and the second wall 34b of the first rail 22, respectively, and for supporting the first wall 38a and the second wall 38b of the second rail 24, respectively, thereby facilitating the smoothness of the displacement of the second rail 24 and the first rail 22 relative to each other.

The retainer 28 is disposed on a longitudinal wall 36 of the first rail 22, and the retainer 28 is adjacent the front end 22a of the first rail 22. The retainer 38 includes a resilient portion 50 (see fig. 2, 2A, 3 and 4), such as, but not limited to, a resilient arm, for example. The resilient portion 50 of the retainer 28 includes a predetermined feature 52; the longitudinal wall 36 of the first rail 22 includes a restraining feature 54.

Preferably, one of the predetermined feature 52 and the limiting feature 54 is a space, and the other of the predetermined feature 52 and the limiting feature 54 is a protrusion; the protruding portion is configured to extend into the space (as shown in fig. 3 and 4). Here, the predetermined feature 52 is taken as a space, and the limiting feature 54 is taken as a protrusion extending into the space, but the implementation is not limited thereto. Preferably, the space is a hole, and the hole is defined by a plurality of hole walls, for example, the elastic portion 50 includes a first hole wall 56a, a second hole wall 56b, a third hole wall 56c and a fourth hole wall 56d, and the hole walls 56a, 56b, 56c, 56d together define a contour having a predetermined shape.

Preferably, the retaining member 28 further comprises a main body portion 58 connected (e.g., fixedly secured) to the longitudinal wall 36 of the first rail 22, the resilient portion 50 having a first end section 60 and a second end section 62, the first end section 60 of the resilient portion 50 being connected to the main body portion 58, the second end section 62 extending from the first end section 60 and being resiliently movable relative to the first end section 60, wherein the predetermined feature 52 is disposed at the second end section 62 of the resilient portion 50.

Preferably, the second end section 62 of the resilient portion 50 includes a first guide feature 64 and a second guide feature 66; the predetermined feature 52 is arranged between the first guide feature 64 and the second guide feature 66. The first guide feature 64 and the second guide feature 66 are inclined or curved.

Preferably, the main body 58 of the holder 28 has a support section 68, and the support section 68 is used to support the elastic portion 50. Here, the support section 68 is bent with respect to the main body 58, and the support section 68 is supported at the bottom of the elastic portion 50. The elastic portion 50 can be supported by the support section 68, which is helpful for the stability of the elastic portion 50 during movement. Wherein the main body 58, the elastic portion 50 and the support section 68 can be integrated into a single piece (as shown in fig. 2A) of the holder 28.

As shown in fig. 4, the detent feature 42 of the sliding aid 26 has a guiding section 70, and the guiding section 70 is a slant or a cambered surface. On the other hand, the elastic portion 50 of the retainer 28 is in a first state S1. Furthermore, the resilient portion 50 of the retainer 28 is arranged with an extension 72 adjacent the predetermined feature 52, such as the extension 72 extending from the first aperture wall 56a toward the second wall 34b of the first rail 22.

When the second rail 24 is displaced from a retracted position to an opening direction D1 relative to the first rail 22 to a predetermined stroke, the release feature 37 is contacted with the first guide feature 64 by the first guide structure 39a, so that the release feature 37 can easily pass over the elastic portion 50, and the sliding assisting device 26 is also moved to the opening direction D1 in response to the displacement of the second rail 24, in which the (guiding segment 70 of the) engaging feature 42 of the sliding assisting device 26 contacts the first guide feature 64 of the elastic portion 50 of the retainer 28, which is a technical category understood by those skilled in the art, and not described herein.

It should be noted that, if the displacement speed of the second rail 24 in the opening direction D1 is too fast, the limiting feature 54 can prevent the second end segment 62 of the elastic portion 50 from deforming or buckling in a specific direction or angle when the (first guiding structure 39a of the first guiding structure 39 a) of the release feature 37 or the (first guiding segment 70 of the first guiding structure 64) of the catch feature 42 of the sliding assisting device 26 contacts the (second guiding segment 64 of the) second end segment 62 of the elastic portion 50 is too large, wherein the area of the first hole wall 56a corresponding to the limiting feature 54 can be increased through the extending segment 72, so as to help prevent the (first guiding segment 64 of the first end segment 62 of the elastic portion 50 from deforming due to stress; or by blocking the fourth aperture wall 56d by the limiting feature 54, the second end section 62 of the resilient portion 50 is thereby prevented from moving or deforming in a lateral direction T due to unexpected forces. Wherein the transverse direction T (e.g., the Y-axis direction described above, or lateral to the first rail 22, as shown in fig. 4).

As shown in fig. 5, when the second rail 24 is further displaced toward the opening direction D1 relative to the first rail 22, a force is generated by the contact between the (guiding section 70 of the) locking feature 42 of the sliding assisting device 26 and the first guiding feature 64 of the elastic portion 50 of the retaining member 28, so that the elastic portion 50 of the retaining member 28 moves from the first state S1 to a second state S2, and at this time, the elastic portion 50 accumulates an elastic force.

As shown in fig. 6 and 7, when the second rail 24 is further displaced relative to the first rail 22 in the opening direction D1 and is removed from the channel 32 of the first rail 22 (as shown in fig. 7), the sliding aid 26 moves to a predetermined position K adjacent to the front end 22a of the first rail 22, and the sliding aid 26 can be snapped onto the predetermined feature 52 of the elastic portion 50 of the holder 28 via the snap feature 42 (as shown in fig. 6).

Specifically, when the sliding-assist device 26 is at the predetermined position K, the detent feature 42 of the sliding-assist device 26 corresponds to the predetermined feature 52 of the elastic portion 50, and the elastic portion 50 releases the elastic force to restore the elastic portion 50 from the second state S2 to the first state S1 (e.g. the locked state), the sliding-assist device 26 protrudes into the predetermined feature 52 of the elastic portion 50 of the retaining member 28 through the detent feature 42, the detent feature 42 corresponds to the first hole wall 56a to prevent the sliding-assist device 26 from being arbitrarily displaced relative to the first rail 22, such as blocking the detent feature 42 through the first hole wall 56a (and the extension 72) to prevent the sliding-assist device 26 from being displaced relative to the first rail 22 from the predetermined position K toward a closing direction D2 (as shown in fig. 6). Wherein, when the slide assist device 26 is in the predetermined position K and the detent feature 42 is detent to the predetermined feature 52 of the resilient portion 50 of the retainer 28, the detent feature 42 and the limiting feature 54 are laterally (or laterally) offset from each other without interfering with each other.

As shown in fig. 8, the sliding aid 26 is at the predetermined position K, and the elastic portion 50 of the retaining member 28 is in the first state S1 (e.g. locking state) for locking the detent feature 42 of the sliding aid 26. When the second rail 24 is reinserted into the channel 32 of the first rail 22 from the outside of the channel 32 of the first rail 22 toward the folding direction D2, the first wall 38a and the second wall 38b of the second rail 24 can be supported by the balls 48 of the first portion 44a and the balls 48 of the second portion 44b of the sliding-aid device 26, respectively, so as to facilitate the stability or smoothness of the second rail 24 inserted into the channel 32 of the first rail 22 toward the folding direction D2.

As shown in fig. 9, 10 and 11, when the second rail 24 continues to be inserted into the channel 32 of the first rail 22 in the retracting direction D2, the second rail 24 can drive the elastic portion 50 of the retaining member 28 through the release feature 37, so that the locking feature 42 of the sliding-assisting device 26 is released from the predetermined feature 52 of the elastic portion 50 of the retaining member 28, so as to allow the sliding-assisting device 26 to be displaced from the predetermined position K toward the retracting direction D2.

Specifically, when the second rail 24 continues to be inserted into the channel 32 of the first rail 22 in the retracting direction D2, the (second guiding structure 39b of the) release feature 37 of the second rail 24 contacts the (second guiding structure 66 of the) elastic portion 50 of the retaining member 28 to generate another force, so that the elastic portion 50 of the retaining member 28 moves from the first state S1 (e.g. the locked state, as shown in fig. 9) to the second state S2 (e.g. the unlocked state, as shown in fig. 10), and the locking feature 42 of the sliding assisting device 26 is released from the predetermined feature 52 of the elastic portion 50 of the retaining member 28, at this time, the elastic portion 50 accumulates an elastic force. When the second rail 24 is further displaced toward the folding direction D2 relative to the first rail 22, the sliding assisting device 26 can move from the predetermined position K toward the folding direction D2 in response to the displacement of the second rail 24, and the elastic portion 50 releases the elastic force to recover from the second state S2 (as shown in fig. 10) to the first state S1 (as shown in fig. 11).

It should be noted that, as shown in fig. 9, the predetermined feature 52 is substantially larger than the detent feature 42. Specifically, the predetermined feature 52 (e.g., a hole) has a longitudinal dimension substantially greater than (or slightly greater than) the longitudinal dimension of the detent feature 42 (e.g., a hook) such that the predetermined feature 52 has a predetermined width when receiving the detent feature 42. According to this configuration, when the second rail 24 is inserted into the channel 32 of the first rail 22 in the retracting direction D2, and the (second guiding structure 39b of the) release feature 37 drives the elastic portion 50 of the retaining member 28 to move from the first state S1 to the second state S2, the locking feature 42 of the sliding assisting device 26 can easily release from the predetermined feature 52 of the elastic portion 50 of the retaining member 28 due to the predetermined width, so that there is a problem that the locking feature 42 and the predetermined feature 52 are prevented from being locked too tightly to each other and difficult to release from each other or the second end section 62 of the elastic portion 50 may be deformed or damaged due to the locking feature 42 and the locking feature 52 being locked too tightly to each other.

From the above description, it can be seen that the sliding rail assembly 20 according to the embodiment of the invention includes the following features:

a. by virtue of the limiting feature 54 on the first rail 22, the resilient portion 50 is prevented from being deformed by the force, which helps to improve the reliability of the slide assembly 20 in use.

B. the predetermined feature 52 has a size substantially greater than the detent feature 42.

C. the body portion 58, the resilient portion 50 and the support section 68 may be integrated into a single piece with the retainer 28.

While the application has been described with reference to the present specific embodiments, it will be appreciated by those skilled in the art that the above embodiments are for illustration only and that various equivalent changes and modifications may be made without departing from the spirit of the application, and therefore, all changes and modifications to the above embodiments shall fall within the scope of the appended claims.

Claims (20)

1. A sliding rail assembly comprises a first rail, a second rail, a sliding assisting device and a retaining piece, wherein the first rail comprises a channel, the second rail is movably arranged in the channel of the first rail, and the second rail can longitudinally displace relative to the first rail; the method is characterized in that:

the sliding assisting device is movably arranged between the first rail and the second rail and comprises a clamping feature; and

Said holder being arranged on the first rail, the holder comprising an elastic portion;

Wherein the elastic portion of the retainer comprises a predetermined feature, the first rail comprises a limiting feature, and the limiting feature is used for preventing the elastic portion from moving in a transverse direction;

when the second rail is displaced towards an opening direction relative to the first rail and is detached from the channel of the first rail, the sliding assisting device is positioned at a preset position, and the sliding assisting device can be clamped to the preset feature of the elastic part of the retainer through the clamping feature.

2. The slide assembly of claim 1 wherein one of the predetermined feature and the limiting feature is a space and the other of the predetermined feature and the limiting feature is a protrusion; the convex part is used for extending into the space.

3. The slide assembly of claim 2 wherein the space is a bore and the bore is defined by a plurality of bore walls.

4. The slide rail assembly of claim 1 wherein the first rail comprises a first wall, a second wall, and a longitudinal wall, the longitudinal wall being connected between the first wall and the second wall of the first rail, the first wall, the second wall, and the longitudinal wall of the first rail together defining the channel; the holder further comprises a body portion connected to the longitudinal wall of the first rail, the resilient portion having a first end section and a second end section, the first end section of the resilient portion being connected to the body portion, and the predetermined feature being arranged at the second end section of the resilient portion.

5. The slide assembly of claim 4, wherein the second end section of the resilient portion includes a first guide feature and a second guide feature; the predetermined feature is arranged between the first guide feature and the second guide feature.

6. The slide assembly of claim 4 wherein the body portion of the retainer has a support section for supporting the resilient portion.

7. The slide assembly of claim 1 wherein the predetermined feature has a size substantially greater than the size of the detent feature.

8. The slide assembly of claim 1 wherein the second rail includes a release feature; when the second rail is reinserted into the channel of the first rail from the outside of the channel of the first rail to a folding direction, the second rail can drive the elastic part of the retainer through the release feature, so that the clamping feature of the sliding assisting device is released from the preset feature of the elastic part of the retainer to allow the sliding assisting device to move from the preset position to the folding direction.

9. The slide rail assembly of claim 4 wherein the slide assist device further comprises a first portion, a second portion, and a longitudinal portion, the longitudinal portion being connected between the first portion and the second portion, the first portion, the second portion, and the longitudinal portion respectively corresponding to the first wall, the second wall, and the longitudinal wall of the first rail; the first and second parts of the sliding aid are provided with a plurality of balls for supporting the first and second walls of the first rail respectively.

10. The slide assembly of claim 1 wherein the detent feature of the slide assist device is a detent.

11. The first rail comprises a first wall, a second wall and a longitudinal wall, the longitudinal wall is connected between the first wall and the second wall of the first rail, the first wall, the second wall and the longitudinal wall of the first rail jointly define a channel, the second rail is movably arranged in the channel of the first rail, and the second rail can longitudinally displace relative to the first rail; the method is characterized in that:

the sliding assisting device is movably arranged between the first rail and the second rail and comprises a clamping feature; and

Said retaining member being arranged on a longitudinal wall of the first rail, the retaining member comprising an elastic portion;

the elastic part of the retainer comprises a space, the longitudinal wall of the first rail comprises a convex part, and the convex part is used for extending into the space;

when the second rail is displaced towards an opening direction relative to the first rail and is detached from the channel of the first rail, the sliding assisting device stretches into the space of the elastic part of the retainer through the clamping feature so as to prevent the sliding assisting device from being displaced randomly relative to the first rail.

12. The slide assembly of claim 11 wherein the space is a bore and the bore is defined by a plurality of bore walls.

13. The slide rail assembly of claim 11 wherein the retainer further comprises a body portion coupled to the longitudinal wall of the first rail, the resilient portion having a first end section and a second end section, the first end section of the resilient portion being coupled to the body portion and the space being disposed at the second end section of the resilient portion.

14. The slide assembly of claim 13, wherein the second end section of the resilient portion includes a first guide feature and a second guide feature; the space is arranged between the first guide feature and the second guide feature.

15. The slide assembly of claim 13 wherein the body portion of the retainer has a support section for supporting the resilient portion.

16. The slide assembly of claim 11 wherein the space has a dimension substantially greater than the dimension of the detent feature.

17. The slide assembly of claim 12 wherein the second rail includes a release feature; when the second rail is reinserted into the channel of the first rail from the outside of the channel of the first rail to a folding direction, the second rail can drive the elastic part of the retainer through the release feature, so that the clamping feature of the sliding assisting device is released from the space of the elastic part of the retainer to allow the sliding assisting device to move from a preset position to the folding direction.

18. The slide rail assembly of claim 13 wherein the slide assist device further comprises a first portion, a second portion, and a longitudinal portion, the longitudinal portion being connected between the first portion and the second portion, the first portion, the second portion, and the longitudinal portion corresponding to the first wall, the second wall, and the longitudinal wall of the first rail, respectively; the first and second parts of the sliding aid are provided with a plurality of balls for supporting the first and second walls of the first rail respectively.

19. The slide assembly of claim 11 wherein the detent feature of the slide assist device is a detent.

20. The slide assembly of claim 11, wherein the resilient portion of the retaining member is arranged with an extension adjacent the space, and the detent feature corresponds to the extension when the sliding assist device is extended into the space of the resilient portion of the retaining member through the detent feature.