CN114847691B

CN114847691B - Sliding rail assembly

Info

Publication number: CN114847691B
Application number: CN202110155955.4A
Authority: CN
Inventors: 陈庚金; 杨顺和; 张维成; 王俊强
Original assignee: King Slide Works Co Ltd; King Slide Technology Co Ltd
Current assignee: King Slide Works Co Ltd; King Slide Technology Co Ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2023-11-24
Anticipated expiration: 2041-02-04
Also published as: CN114847691A

Abstract

A slide rail assembly includes a first rail, a second rail, a stopper, a positioning member, and an operating member. The first rail is provided with a blocking feature and a positioning feature; the second rail is displaceable relative to the first rail; the baffle and the positioning piece are movably arranged on the second rail, so that the baffle and the positioning piece can be in one of a first state and a second state relative to the second rail; the operation piece is used for operating one of the blocking piece and the positioning piece; when the second rail is in a first extending position relative to the first rail, the blocking feature can block the blocking piece in the first state to prevent the second rail from being displaced from the first extending position to a folding direction; when the second rail is at a second extending position relative to the first rail, the second rail can be prevented from being displaced relative to the first rail from the second extending position to an opening direction or a closing direction by the two positions of the positioning part and the blocking part in the first state corresponding to the positioning feature of the first rail respectively.

Description

Sliding rail assembly

Technical Field

The present invention relates to a sliding rail assembly, and more particularly, to a sliding rail assembly having a first rail and a second rail having a blocking mechanism at an extended position relative to each other, and being releasable by an operating member.

Background

For example, U.S. Pat. No. 10,041,535 B2 discloses a track assembly comprising a first track, a second track, a third track, a locking member and an operating member. The second rail can move from a first position to a second position relative to the first rail; the third rail can move relative to the second rail; the locking piece is arranged on the second rail and used for locking a part of the first rail when the second rail is positioned at the second position, so that the second rail cannot move from the second position to the first position relative to the first rail; the user can apply a force to the operating member to enable the operating member to move from a first preset position to a second preset position relative to the second rail, so as to release the locking of the locking member on the part of the first rail. When the operating member is displaced from the first predetermined position to the second predetermined position by the force applied by the user, although the locking member can be used to unlock the portion of the first rail, the third rail is detached from the second rail and is matched with the first rail by relying on the displacement of the second rail pushing into the first rail.

As disclosed in U.S. patent publication No. 9,681,749 B2, which discloses a track assembly that can also be applied in a narrow space, the operating member is returned from a predetermined position to an initial position by a return elastic member, which also means that the operating member is forcibly brought back from the predetermined position to the initial position in response to the elastic force of the return elastic member once the user stops applying the force to the operating member. However, if two sets of sliding rails are installed on one side of the case, four sliding rails are disposed on two sides of the case, which is more unfavorable for the two hands of a single person, and it is obvious that the mechanism for forcibly returning the operating member from the predetermined position to the initial position by the elastic force of the return elastic member does not meet the specific requirements in the market.

Disclosure of Invention

The present invention is directed to a slide assembly that enables one slide to move away from an extended position relative to another slide by releasing a blocking mechanism via an operating member.

According to one aspect of the present invention, a slide assembly includes a first rail, a second rail, a stopper, a positioning member, and an operating member. The first rail is provided with a blocking feature and a locating feature; the second rail is displaceable relative to the first rail; the baffle and the positioning piece are movably arranged on the second rail, so that the baffle and the positioning piece can be in one of a first state and a second state relative to the second rail; the operating piece is used for operating one of the blocking piece and the positioning piece; wherein, when the second rail is at a first extending position relative to the first rail, the blocking feature can block the blocking piece at the first state, so as to prevent the second rail from moving from the first extending position to a folding direction; when the second rail is at a second extending position relative to the first rail, the positioning piece and the blocking piece in the first state are respectively corresponding to two parts of the positioning feature of the first rail so as to prevent the second rail from being displaced relative to the first rail from the second extending position to an opening direction or a closing direction; when the second rail is positioned at the first extension position, the sliding rail assembly has a first length; when the second rail is in the second extended position, the sliding rail assembly has a second length smaller than the first length.

According to another aspect of the present invention, a sliding rail assembly includes a first rail, a second rail, a stopper, a positioning member, and an operating member. The first rail is provided with a locating feature; the second rail is displaceable relative to the first rail; the baffle and the positioning piece are movably arranged on the second rail, so that the baffle and the positioning piece can be in one of a first state and a second state relative to the second rail; the operating piece is used for operating one of the blocking piece and the positioning piece; when the second rail is displaced from a folding position to an opening direction to an extending position relative to the first rail, the positioning piece and the blocking piece in the first state are respectively corresponding to two parts of the positioning feature of the first rail so as to prevent the second rail from being displaced from the extending position to the opening direction or the folding direction relative to the first rail.

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 perspective view showing a slide assembly according to a first embodiment of the present invention in an extended state and including a first rail, a second rail and a third rail.

Fig. 2 is an exploded perspective view of a slide assembly according to a first embodiment of the present invention.

Fig. 3 shows an enlarged schematic view of region a of fig. 2.

Fig. 4 is a perspective view showing a second rail of the sliding rail assembly and an operating member thereof in a first operating position according to the first embodiment of the present invention.

Fig. 5 is a schematic perspective view showing a second rail of the sliding rail assembly and an operating member thereof in another view angle of the first operating position according to the first embodiment of the present invention.

Fig. 6 is a perspective view showing a second rail of the sliding rail assembly and an operating member thereof in a second operating position according to the first embodiment of the invention.

Fig. 7 is a schematic perspective view showing a second rail of the sliding rail assembly and an operating member thereof in another view angle of the second operating position according to the first embodiment of the present invention.

Fig. 8 is a schematic perspective view of a sliding rail assembly applied to a rack and carrying a carrier according to a first embodiment of the present invention.

Fig. 9 shows a schematic view of the sliding rail assembly with a first length in the extended state and the operating member in the first operating position according to the first embodiment of the present invention.

Fig. 10 shows a schematic view of the sliding rail assembly of the first embodiment of the present invention in the extended state, and the operating member in the second operating position.

Fig. 11 is a schematic view showing that the second rail of the sliding rail assembly according to the first embodiment of the invention can be displaced in the folding direction relative to the first rail.

Fig. 12 is a schematic view showing a second rail of the sliding rail assembly according to the first embodiment of the invention being further displaced in the folding direction relative to the first rail.

Fig. 13 shows an enlarged schematic view of region a of fig. 12.

Fig. 14 is a schematic view showing a second rail of the sliding rail assembly according to the first embodiment of the invention being further displaced in a folding direction relative to the first rail.

Fig. 15 is a schematic view showing a second rail of the sliding rail assembly according to the first embodiment of the invention in a second extended position relative to the first rail.

Fig. 16 is a schematic view showing the sliding rail assembly with a second length in another extended state according to the first embodiment of the present invention.

FIG. 17 is a schematic view showing the sliding rail assembly of the first embodiment of the present invention in the extended state, and the third rail being detachable from the second rail.

Fig. 18 shows a schematic view of the displacement of the third rail of the sliding rail assembly relative to the second rail in the folding direction according to the first embodiment of the present invention.

Fig. 19 shows a schematic view of the third rail of the sliding rail assembly according to the first embodiment of the present invention moving in the folding direction relative to the second rail.

Fig. 20 is a schematic view showing a sliding rail assembly in a fully retracted state according to a first embodiment of the present invention.

Fig. 21 shows a schematic view of the third rail of the sliding rail assembly of the first embodiment of the present invention displaced in the opening direction relative to the second rail.

Fig. 22 shows a schematic view of the third rail of the sliding rail assembly of the first embodiment of the present invention moving in the opening direction relative to the second rail.

Fig. 23 shows a schematic view of the third rail of the sliding rail assembly of the first embodiment of the present invention further displaced in the opening direction relative to the second rail.

Fig. 24 is a schematic view showing the second rail of the sliding rail assembly of the first embodiment of the present invention in the second extended position relative to the first rail, and the operating member in the first operating position.

Fig. 25 shows a schematic view of the second rail of the sliding rail assembly of the first embodiment of the present invention in the second extended position relative to the first rail, and the operating member in the second operating position.

Fig. 26 shows a partial schematic view of a second rail of the sliding rail assembly of the second embodiment of the present invention in the second extended position relative to the first rail, wherein the blocking member and the positioning member are blocked at two portions of the positioning feature.

Fig. 27 is a schematic partial view showing a second rail of the sliding rail assembly according to the second embodiment of the present invention in the second extended position relative to the first rail, and the blocking member and the positioning member can be driven by the operating member to be respectively not blocked at two portions of the positioning feature.

Fig. 28 is a partial schematic view showing the second rail of the sliding rail assembly of the second embodiment of the present invention being in the second extended position relative to the first rail, and the blocking member and the positioning member being blocked at two portions of the positioning feature respectively.

Fig. 29 is a schematic view showing a portion of a second rail of the sliding rail assembly according to the second embodiment of the present invention in the second extended position relative to the first rail, wherein the stop and the positioning member are not blocked at two portions of the positioning feature by the third rail.

FIG. 30 is a schematic view showing a third embodiment of the track assembly of the present invention in an extended state with the blocking feature of the first track blocking the stop of the second track.

FIG. 31 is a schematic view showing a slide rail assembly according to a third embodiment of the invention in an extended state, wherein the blocking feature of the first rail does not block the blocking member of the second rail.

Fig. 32 is a schematic view showing displacement of the second rail and the third rail of the sliding rail assembly of the third embodiment of the present invention in the folding direction relative to the first rail.

Fig. 33 is a schematic view showing a second rail and a third rail of the sliding rail assembly according to the third embodiment of the invention being further displaced to a retracted position relative to the first rail.

Fig. 34 is a schematic view showing a displacement of the second rail and the third rail of the sliding rail assembly of the third embodiment of the present invention in the opening direction relative to the first rail.

Fig. 35 is an enlarged schematic view of the area a of fig. 34.

Fig. 36 shows a schematic view of a second rail of the sliding rail assembly according to the third embodiment of the present invention, which is further displaced in the opening direction relative to the first rail.

Fig. 37 is a schematic view showing a second rail of the sliding rail assembly according to the third embodiment of the invention in a second extended position relative to the first rail.

Fig. 38 is a schematic view showing a slide assembly according to a third embodiment of the invention in another extended state.

Detailed Description

As shown in fig. 1 and 2, a slide rail assembly 20 according to the present invention includes a first rail 22 and a second rail 24, and preferably a third rail 26. The second rail 24 is movably mounted between the first rail 22 and the third rail 26. The first rail 22 (e.g., outer rail), the second rail 24 (e.g., middle rail), and the third rail 26 (e.g., inner rail) are longitudinally displaceable relative to one another. When the sliding rail assembly 20 is in a fully extended state, the second rail 24 is in a first extended position E1 relative to the first rail 22, and the third rail 26 is in an open position K relative to the second rail 24. It should be noted that, in this embodiment, the X-axis direction is the longitudinal direction (or the length direction or the displacement direction of the sliding rail), the Y-axis direction is the transverse direction (or the lateral direction of the sliding rail), and the Z-axis direction is the vertical direction (or the height direction of the sliding rail).

The first rail 22 includes a first wall 28a, a second wall 28b and a longitudinal wall 30 connected between the first wall 28a and the second wall 28b of the first rail 22, the first wall 28a, the second wall 28b and the longitudinal wall 30 of the first rail 22 together define a first channel for receiving the second rail 24. The first rail 22 is provided with a blocking feature 32 (shown in fig. 2). Preferably, the first rail 22 is also provided with a first release feature 34, a locating feature 36, and a second release feature 38. Wherein the blocking feature 32, the first release feature 34, the locating feature 36, and the second release feature 38 are disposed to the longitudinal wall 30 of the first rail 22 in a front-to-back sequence.

Preferably, the sliding rail assembly 20 further comprises a resilient base 33 disposed on the first rail 22, the resilient base 33 comprises a first connecting portion 40a, a second connecting portion 40b and a supporting structure 42 (as shown in fig. 2), the first connecting portion 40a and the second connecting portion 40b are connected to the longitudinal wall 30 of the first rail 22, and the supporting structure 42 is located between the first connecting portion 40a and the second connecting portion 40 b. The support structure 42 includes the blocking feature 32, a longitudinal portion 25 and a guiding portion 27, wherein the blocking feature 32 is exemplified by, but not limited to, a retaining wall (or vertical wall); the longitudinal portion 25 is located between the blocking feature 32 and the guide portion 27, and the guide portion 27 is, for example, a bevel or a cambered surface.

Preferably, the first release feature 34 and the second release feature 38 have substantially the same structural configuration, and as illustrated by the first release feature 34, the first release feature 34 is, for example, a protrusion protruding laterally (or transversely) with respect to the longitudinal wall 30 of the first rail 22, and the front and rear portions of the first release feature 34 have a first guide section 44a and a second guide section 44b, respectively, the first guide section 44a and the second guide section 44b being beveled (or curved), but are not limited in implementation.

Preferably, the slide assembly 20 further includes a first auxiliary portion 46 and a second auxiliary portion 48, and the positioning feature 36 is defined between the first auxiliary portion 46 and the second auxiliary portion 48. The first auxiliary portion 46 and the second auxiliary portion 48 are spaced apart from each other and are symmetrical to each other, the first auxiliary portion 46 and the second auxiliary portion 48 have substantially the same structural configuration, and the first auxiliary portion 46 is illustrated as the first auxiliary portion 46, and the first auxiliary portion 46 is, for example, a protrusion protruding laterally (or transversely) with respect to the longitudinal wall 30 of the first rail 22.

Preferably, the first auxiliary portion 46 and the second auxiliary portion 48 have a first guiding structure 50 and a second guiding structure 52, respectively, and the first guiding structure 50 and the second guiding structure 52 are inclined planes (or cambered surfaces), but the implementation is not limited thereto.

The second rail 24 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 24, the first wall 54a, the second wall 54b and the longitudinal wall 56 of the second rail 24 together defining a second channel for receiving the third rail 26. The second rail 24 has a first side L1 and a second side L2 opposite to each other. The first side L1 is adjacent to the first rail 22, and the second side L2 is adjacent to the third rail 26.

The slide assembly 20 includes a stop 58 and an operating member 60, and preferably a positioning member 62 and a return spring 64. The second rail 24, the stopper 58, the operating member 60, and the return elastic member 64 may constitute a sliding rail set. Both the stop 58 and the positioning member 62 are movably mounted to the second rail 24. Here, the blocking member 58 and the positioning member 62 are pivotally connected to the second side L2 of the longitudinal wall 56 of the second rail 24 by a first shaft 66 and a second shaft 68, respectively, for example, but not limited thereto.

Preferably, the second rail 24 includes at least one hole communicating a first side L1 and a second side L2 of the longitudinal wall 56 of the second rail 24. Here, a first hole H1 and a second hole H2 are taken as an example. Further, the blocking member 58 includes a blocking portion 55 penetrating the first hole H1, the blocking portion 55 facing the longitudinal wall 30 of the first rail 22, and the blocking portion 55 is configured to cooperate with the blocking feature 32 of the first rail 22. On the other hand, the positioning member 62 includes a positioning portion 63 penetrating the second hole H2, the positioning portion 63 faces the longitudinal wall 30 of the first rail 22, and the positioning portion 63 is configured to cooperate with the positioning feature 36 of the first rail 22. Here, the positioning portion 63 is exemplified as a column, but the implementation is not limited thereto.

Preferably, the rail assembly 20 further includes a predetermined object 69 coupled to the longitudinal wall 56 of the second rail 24, and the predetermined object 69 has a first resilient feature 70 and a second resilient feature 72 for providing resilient force to the stop 58 and the positioning member 62, respectively.

Preferably, the second rail 24 and the positioning member 62 include mutually matched limiting structures, so that the positioning member 62 can move within a limited range relative to the second rail 24, where, for example, a corresponding portion 74 (e.g. a protrusion) is disposed on the longitudinal wall 56 of the second rail 24 and penetrates a portion of a limiting space 76 of the positioning member 62, but the invention is not limited thereto.

The operating member 60 is operatively mounted to the second rail 24, and the operating member 60 is configured to operate the stop 58 and the positioning member 62, or to operate one of the stop 58 and the positioning member 62.

Preferably, the operating member 60 is located at a first side L1 of the longitudinal wall 56 of the second rail 24, and the operating member 60 includes an operating portion 78, a driving portion 80 and an extending portion 82 connected between the operating portion 78 and the driving portion 80. Wherein the operation portion 78 is located adjacent to a front end portion 24a of the second rail 24; on the other hand, the stopper 58 and the positioning member 62 are located near a rear end 24b of the second rail 24.

Preferably, the second rail 24 further includes a third hole H3, the driving portion 80 of the operating member 60 can pass through the third hole H3 from the first side L1 to the second side L2 of the second rail 24, and the driving portion 80 is located adjacent to the blocking member 58.

Preferably, the second rail 24 and the operating member 60 include mutually matched limiting features, so that the operating member 60 can move longitudinally within a limited range relative to the second rail 24, wherein the extending portion 82 of the operating member 60 is provided with at least one long hole 84, and the at least one connecting member 86 is connected to the longitudinal wall 56 of the second rail 24 by passing through a portion of the at least one long hole 84 through at least one connecting member 86, for example, but not limited thereto.

The return elastic member 64 is used for providing a return elastic force to the operation member 60. Here, the operation member 60 and the (longitudinal wall 56 of the) second rail 24 are connected to each other at both ends of the return elastic member 64, for example, but the embodiment is not limited thereto.

Preferably, the operating member 60 is provided with a detent feature 88 (as shown in fig. 3), wherein the slide assembly 20 further comprises a resilient member 90 coupled to the operating member 60, the resilient member 90 comprises a connecting section 92 and a resilient section 94, the connecting section 92 is coupled to the extending portion 82 of the operating member 60, and the resilient section 94 is coupled to the connecting section 92, wherein the resilient section 94 comprises the detent feature 88.

Preferably, the detent feature 88 is, for example, a hook, and the detent feature 88 has a guide surface 96, such as a bevel or a curved surface (as shown in fig. 3).

Preferably, the resilient section 94 of the resilient member 90 further includes an unlocking feature 98, and the unlocking feature 98 is, for example, a protrusion, and the front and rear portions of the unlocking feature 98 have a first guiding feature 100a and a second guiding feature 100b, for example, a slope or arc surface (as shown in fig. 3), respectively.

As shown in fig. 4 and 5, both the stopper 58 and the positioning member 62 can be in a first state S1 (shown in fig. 4) relative to the second rail 24. On the other hand, the operating member 60 can be located at a first operating position P1 (as shown in fig. 4 and 5) relative to the second rail 24.

Preferably, the stop 58 further includes a contact portion 102 and an actuating portion 104, and the first shaft 66 is located between the contact portion 102 and the actuating portion 104. Wherein the contact portion 102 corresponds to (or contacts) the driving portion 80 of the operating member 60 (as shown in fig. 4); and, the blocking portion 55 is adjacent to the actuating portion 104 (as shown in fig. 4), and the blocking portion 55 extends to the first side L1 of the second rail 24 (as shown in fig. 5). The first resilient feature 70 provides a resilient force to the catch 58, and the catch 58 remains in the first state S1 (shown in fig. 4).

Preferably, the positioning member 62 includes a contact section 106 and an actuating section 108, and the second shaft 68 is located between the contact section 106 and the actuating section 108. The positioning portion 63 is adjacent to the contact section 106 (as shown in fig. 4), and the positioning portion 63 extends to the first side L1 of the second rail 24 (as shown in fig. 5). The second resilient feature 72 provides a resilient force to the positioning member 62, and the positioning member 62 is maintained in the first state S1 (as shown in fig. 4).

Preferably, the release feature 98 of the resilient section 94 of the resilient member 90 passes through a corresponding aperture 110 (shown in FIG. 5) of the extension 82 of the operating member 60, and the release feature 98 is configured to cooperate with the first release feature 34 (or the second release feature 38) of the first rail 22.

Preferably, the longitudinal wall 56 of the second rail 24 has a first corresponding space M1, a second corresponding space M2, and a predetermined wall 112 disposed between the first corresponding space M1 and the second corresponding space M2, and the predetermined wall 112 separates the first corresponding space M1 from the second corresponding space M2. When the operating member 60 is at the first operating position P1 relative to the second rail 24, the locking feature 88 of the elastic member 90 corresponds to the first corresponding space M1 (as shown in fig. 5), and the locking feature 88 of the elastic member 90 is adjacent to a first wall portion 112a of the predetermined wall 112.

As shown in fig. 6 and 7, the user may apply a force F to (the operating portion 78 of) the operating member 60, so that the operating member 60 may move from the first operating position P1 to a second operating position P2 relative to the second rail 24, in which the operating member 60 contacts the contact portion 102 of the blocking member 58 via the driving portion 80 to drive the blocking member 58 to move (e.g. pivot) from the first state S1 to a second state S2 (as shown in fig. 6), and preferably, the blocking member 58 contacts the positioning portion 63 of the positioning member 62 via the actuating portion 104 to drive the positioning member 62, so that the positioning member 62 moves (e.g. pivots) from the first state S1 to the second state S2 (as shown in fig. 6).

When the operating member 60 is at the second operating position P2, the returning elastic member 64 can accumulate a returning elastic force F' (as shown in fig. 7) of the first operating position P1, and the locking feature 88 of the elastic member 90 corresponds to the second corresponding space M2, and the operating member 60 is locked to a predetermined portion of the second rail 24 (for example, the locking feature 88 is locked to a second wall portion 112b of the predetermined wall 112 of the second rail 24) through the locking feature 88, so as to keep the operating member 60 at the second operating position P2 (as shown in fig. 7).

Preferably, when the operating member 60 moves from the first operating position P1 (shown in fig. 5) to the second operating position P2 (shown in fig. 7), the engaging feature 88 can contact the first wall 112a (shown in fig. 5) through the guiding surface 96, so that the engaging feature 88 can pass over the predetermined wall 112 until the engaging feature 88 corresponds to the second corresponding space M2 (shown in fig. 7), and the engaging feature 88 can engage the second wall 112b (shown in fig. 7) of the predetermined wall 112 of the second rail 24.

Preferably, when the operating member 60 is at the second operating position P2, the operating member 60 is used for maintaining the blocking member 58 and the positioning member 62 in the second state S2 (as shown in fig. 6); wherein, the operating member 60 contacts the positioning member 62 through the blocking member 58 in the second state S2, so that the positioning member 62 is also maintained in the second state S2 (as shown in fig. 6).

As shown in fig. 8, a carrier 114 may be mounted to a frame 116 by the slide assembly 20. The slide assembly 20 is in the fully extended state. The first rail 22 is mounted (fixed) to the frame 116 (the first rail 22 is not shown due to the view angle), and the third rail 26 is used for carrying the carrier 114, such that the carrier 114 can be displaced from the frame 116 to the outside of the frame 116 through the third rail 26.

As shown in fig. 9, the slide assembly 20 is in the fully extended state. The second rail 24 is at the first extended position E1 relative to the first rail 22, and the third rail 26 is at the open position K relative to the second rail 24. Preferably, at least one sliding assisting device is movably mounted between each two sliding rails for assisting the smoothness of the displacement of each two sliding rails relative to each other, for example, a first sliding assisting device 118 is disposed between the first rail 22 and the second rail 24, a second sliding assisting device 120 is disposed between the second rail 24 and the third rail 26, and the sliding assisting devices 118, 120 are configured with a plurality of balls B. It should be noted that when the second rail 24 is at the first extended position E1 relative to the first rail 22, the sliding rail assembly 20 has a first length J1, such that the front end 26a of the third rail 26 has only a first distance X1 from an object 122 (e.g., a door or an obstacle), and the third rail 26 cannot be detached from the second channel of the second rail 24 in an opening direction D1 due to the first distance X1 being too narrow. When the second rail 24 is at the first extended position E1 relative to the first rail 22, the blocking feature 32 can block the blocking portion 55 of the blocking member 58 in the first state S1, so as to prevent the second rail 24 from being displaced from the first extended position E1 in a retracting direction D2. On the other hand, the positioning piece 62 contacts the guide portion 27 of the elastic seat 33 of the first rail 22 through the positioning portion 63. In addition, the operating member 60 is at the first operating position P1, the returning elastic member 64 is in a state that no returning elastic force has been accumulated, and the locking feature 88 of the elastic section 94 of the elastic member 90 is adjacent to the first wall portion 112a of the predetermined wall 112 (this portion can also be matched with reference to fig. 5).

As shown in fig. 10, the user can apply the force F to the operation portion 78 of the operation member 60 to move the operation member 60 from the first operation position P1 to the second operation position P2 and drive the blocking member 58 to switch from the first state S1 to the second state S2 through the driving portion 80, so that the blocking feature 32 cannot block the blocking portion 55 of the blocking member 58 in the second state S2, so as to allow the second rail 24 to be displaced from the first extended position E1 to the folding direction D2 relative to the first rail 22. On the other hand, the blocking member 58 is coupled to the positioning member 62, so that the positioning member 62 is in the second state S2. When the blocking member 58 and the positioning member 62 are in the second state S2, the first elastic feature 70 and the second elastic feature 72 are respectively in a state of accumulating elastic force (this part can also be matched with fig. 6). In addition, when the operating member 60 is at the second operating position P2, the returning elastic member 64 is in a state of accumulating the returning elastic force F', and the locking feature 88 of the elastic section 94 of the elastic member 90 is locked to the second wall 112b of the predetermined wall 112 of the second rail 24, so as to keep the operating member 60 at the second operating position P2 (this part can also be matched with fig. 7).

As shown in fig. 11, when the second rail 24 is displaced from the first extended position E1 to the folding direction D2 relative to the first rail 22, the (second guiding feature 100b of the) releasing feature 98 of the elastic member 90 of the operating element 60 contacts the (first guiding segment 44a of the) first releasing feature 34 of the first rail 22, so as to drive the elastic segment 94 of the elastic member 90 to release the locking feature 88 from the second wall portion 112b of the predetermined wall 112 of the second rail 24.

As shown in fig. 12 and 13, the second rail 24 can be further displaced in the folding direction D2 relative to the first rail 22. Wherein, once the locking feature 88 is no longer locked to the second wall 112b of the predetermined wall 112 of the second rail 24, the restoring elastic force F' is released to the operating member 60 by the restoring elastic member 64, so that the operating member 60 can return from the second operating position P2 to the first operating position P1, such that the locking feature 88 returns to a position adjacent to the first wall 112a of the predetermined wall 112 of the second rail 24 (as shown in fig. 13, this part can also cooperate with fig. 5), and the blocking member 58 and the positioning member 62 return to the first state S1 from the second state S2 in response to the first elastic feature 70 and the second elastic feature 72 releasing elastic force, respectively.

As shown in fig. 14 and 15, when the second rail 24 is further displaced to the second extended position E2 in the folding direction D2 relative to the first rail 22, the positioning member 62 is pivoted by an angle along the guiding of the first guiding structure 50 (inclined surface or cambered surface) of the first auxiliary portion 46 by the positioning portion 63, so that the second elastic feature 72 is in a state of accumulating elastic force (as shown in fig. 14), until the second rail 24 is in the second extended position E2 (as shown in fig. 16), the positioning member 62 is in the first state S1 in response to the release of the elastic force of the second elastic feature 72, such that the positioning portion 63 of the positioning member 62 can be blocked between the first auxiliary portion 46 and the second auxiliary portion 48, for example, so as to prevent the second rail 24 from being displaced to the opening direction D1 or the folding direction D2 relative to the first rail 22.

As shown in fig. 16 and 17, when the second rail 24 is at the second extended position E2 relative to the first rail 22, the sliding rail assembly 20 has a second length J2 smaller than the first length J1, such that a second distance X2 between the front end 26a of the third rail 26 and the object 122 is greater than the first distance X1, thereby facilitating the third rail 26 to be detached from the second channel of the second rail 24 in the opening direction D1 (as shown in fig. 17).

As shown in fig. 18 to 20, the third rail 26 includes a first wall 29a, a second wall 29b, and a longitudinal wall 31 connected between the first wall 29a and the second wall 29b of the third rail 26. Further, if the second rail 24 is to be displaced from the second extended position E2 to the retracted direction D2 to a retracted position R (e.g. a fully retracted position) relative to the first rail 22, the third rail 26 is displaced from the above-mentioned open position K to the retracted direction D2 until the third rail 26 (e.g. the rear end 26 b) contacts an auxiliary section 124 of the stopper 58 (the auxiliary section 124 is connected to the actuating portion 104 of the stopper 58, as shown in fig. 18), such that the stopper 58 is no longer in the first state S1, and the stopper 58 is able to interlock the positioning member 62 to be no longer in the first state S1, such that the positioning portion 63 of the positioning member 62 is released from the positioning feature 36 (as shown in fig. 19), for allowing the second rail 24 to be displaced from the second extended position E2 to the retracted direction D2 relative to the first rail 22 until the assembly 20 is in a fully retracted state (as shown in fig. 20), such that the second rail 24 is also in a predetermined position relative to the third rail 24, and the third rail 26 is also in a predetermined position relative to the first rail 24. It should be noted that, as shown in fig. 19 and 20, the second wall 29b and the first wall 29a of the third rail 26 support the blocking member 58 and the positioning member 62 respectively, so as to keep the blocking member 58 and the positioning member 62 in the non-first state S1 (i.e. the blocking member 58 and the positioning member 62 are not in the first state S1), and the first elastic feature 70 and the second elastic feature 72 are in a state of accumulating elastic force, it should be noted that, since the first wall 29a of the third rail 26 blocks the moving path (pivot path) of the positioning member 62, the positioning member 62 can be kept in the non-first state S1.

As shown in fig. 20-23, the third rail 26 includes a synchronization feature 126 (e.g., a hole wall, but not limited in implementation) disposed on the second wall 29b of the third rail 26. Further, when the third rail 26 is displaced to a predetermined stroke in the opening direction D1 relative to the second rail 24 from the retracted position (as shown in fig. 20), the synchronization feature 126 of the third rail 26 corresponds to the auxiliary segment 124 of the stopper 58, so that the stopper 58 can be disengaged from the synchronization feature 126 of the third rail 26 by the auxiliary segment 124 in response to the release force of the first elastic feature 70, so that the second rail 24 can be displaced to the opening direction D1 synchronously with the third rail 26 (as shown in fig. 21), when the stopper 55 of the stopper 58 is displaced to a predetermined stroke in the opening direction D1 synchronously with the opening direction D1, the stopper 55 is along the guiding portion 27 of the elastic seat 33 of the first rail 22 and reaches the longitudinal portion 25 of the elastic seat 33, so that the auxiliary segment 124 of the stopper 58 can be deflected by an angle from the synchronization feature 126 of the third rail 26, so that the second rail 24 and the third rail 26 can be simultaneously displaced to the opening direction D1 ((as shown in fig. 22), and when the stopper 58 is not displaced to the second rail 24 b, the stopper 58 is also displaced to the second rail 24 a corresponding to the second rail 22 a, and the stopper 22 is not being displaced to the second rail 22 a corresponding to the second rail 22, and the stopper 58 is also prevented from being displaced to the second rail 22 a relative to the stopper 1, and the stopper 2 is positioned to the stopper 22 a corresponding to the stopper 2, which is not being displaced to the stopper 22 a portion of the stopper 22 is displaced to the stopper 22, from the stopper 2, which is shown in the second rail 2, and is positioned to the stopper was displaced to the stopper 2, from the stopper was moved.

As shown in fig. 24 and 25, when the second rail 24 is at the second extended position E2 relative to the first rail 22, the second rail 24 and the first rail 22 can be released from the locking relationship by the third rail 26 (e.g. fig. 18 and 19), and in this embodiment, the user can also directly release the locking relationship between the second rail 24 and the first rail 22 by the operating member 60. Further, when the second rail 24 is at the second extended position E2 relative to the first rail 22, the user can apply the force F to move the operating member 60 from the first operating position P1 to the second operating position P2, and the driving portion 80 can drive the blocking member 58 to switch from the first state S1 to the second state S2, so that the blocking member 58 drives the positioning member 62 to switch from the first state S1 to the second state S2, and the positioning portion 63 of the positioning member 62 is released from the positioning feature 36 of the first rail 22, so as to allow the second rail 24 to be displaced from the second extended position E2 to the folding direction D2 (or the opening direction D1) relative to the first rail 22. When the operating member 60 is at the second operating position P2, the operating member 60 is engaged with the predetermined portion of the second rail 24 by the engaging feature 88 to maintain the operating member 60 at the second operating position P2 (see fig. 7).

When the second rail 24 is moved from the second extending position E2 to the folding direction D2 to the folding position R, the second releasing feature 38 of the first rail 22 drives the elastic member 90 to release the locking feature 88 from the predetermined portion of the second rail 24, so that the operating member 60 can return from the second operating position P2 to the first operating position P1 by the restoring elastic force F' of the restoring elastic member 64 (the technical principle of this portion is substantially the same as that of fig. 11 and is not repeated herein).

The slide rail assembly 20 of the first embodiment of the present invention is characterized in that the operating member 60 can be maintained at the second operating position P2 by the engaging feature 88 engaging the predetermined portion of the second rail 24, and once the engaging feature 88 is no longer engaged with the predetermined portion of the second rail 24, the operating member 60 can be returned from the second operating position P2 to the first operating position P1 by providing the return elastic force by the return elastic member 64.

Fig. 26 shows a slide rail assembly 200 according to a second embodiment of the present invention. The difference between the sliding rail assembly 200 of the second embodiment and the sliding rail assembly 20 of the first embodiment is that: the positioning feature 204 of the first rail 202 may be a protrusion protruding laterally (laterally) with respect to the longitudinal wall 205 of the first rail 202, and the positioning portion 208 of the positioning member 206 may be an extension foot.

Further, the longitudinal wall 212 of the second rail 210 has a first hole H1 'and a second hole H2' for communicating the first side and the second side of the longitudinal wall 212 of the second rail 210 (this part is disclosed in the first embodiment and is not described herein), wherein the blocking portion 216 of the blocking member 214 penetrates the first hole H1', and the positioning portion 208 of the positioning member 206 penetrates the second hole H2'.

When the second rail 210 is at the second extended position E2 relative to the first rail 202, the blocking or locking effect can be provided by the positioning portion 208 of the positioning member 206 in the first state S1 and the blocking portion 216 of the blocking member 214 in the first state S1 corresponding to two portions (e.g. the rear portion 204b and the front portion 204 a) of the positioning feature 204, respectively, so as to prevent the second rail 210 from being displaced from the second extended position E2 to the opening direction D1 or the closing direction D2 relative to the first rail 202.

As shown in fig. 26 and 27, when the second rail 210 is at the second extended position E2 relative to the first rail 202, the user can release the blocking or locking relationship between the second rail 210 and the first rail 202 through the operation member 218. Further, the user can apply the force F to move the operating member 218 from the first operating position P1 (as shown in fig. 26) to the second operating position P2 (as shown in fig. 27), and the driving portion 220 can drive the blocking member 214 to switch from the first state S1 to the second state S2, so that the blocking member 214 drives the positioning member 206 to switch from the first state S1 to the second state S2, and the positioning portion 208 of the positioning member 206 and the blocking portion 216 of the blocking member 214 no longer correspond to two portions (such as the rear portion 204b and the front portion 204 a) of the positioning feature 204 of the first rail 202, so as to allow the second rail 210 to be displaced from the second extending position E2 to the opening direction D1 or the closing direction D2 relative to the first rail 202.

As shown in fig. 28 and 29, when the second rail 210 is at the second extended position E2 relative to the first rail 202, the user can also displace the third rail 222 from the above-mentioned open position K toward the closing direction D2 through the third rail 222 until the third rail 222 (e.g., the rear end 222 b) contacts the auxiliary section 224 (as shown in fig. 28) of the stopper 214, such that the stopper 214 is driven and no longer in the first state S1, and the stopper 214 can interlock the positioning member 206 and no longer in the first state S1 (as shown in fig. 29), such that the positioning portion 208 of the positioning member 206 and the stopper 216 of the stopper 214 no longer correspond to two portions (e.g., the rear portion 204b and the front portion 204 a) of the positioning feature 204 of the first rail 202, so as to allow the second rail 210 to displace from the second extended position E2 toward the open direction D1 or the closing direction D2 relative to the first rail 202 until the slide rail 200 is in the above-mentioned fully closed state S1 (as shown in fig. 29), such that the positioning portion 208 and the second rail 210 is also in the predetermined position R relative to the second rail 210.

The slide rail assembly 200 of the second embodiment of the present invention includes the features that the positioning feature 204 of the first rail 202 may be a protrusion protruding laterally (laterally) with respect to the longitudinal wall 205 of the first rail 202, and the positioning portion 208 of the positioning member 206 may be an extension leg; when the second rail 210 is at the second extended position E2 relative to the first rail 202, the blocking or locking effect can be provided by the positioning portion 208 of the positioning member 206 in the first state S1 and the blocking portion 216 of the blocking member 214 in the first state S1 corresponding to two portions (e.g. the rear portion 204b and the front portion 204 a) of the positioning feature 204, respectively, so as to prevent the second rail 210 from being displaced from the second extended position E2 to the opening direction D1 or the closing direction D2 relative to the first rail 202.

Fig. 30 and 31 illustrate a sliding rail assembly 300 according to a third embodiment of the present invention. The sliding rail assembly 300 of this third embodiment is substantially different from the sliding rail assembly 20 of the first embodiment described above in that: the above-described return elastic member 64, elastic member 90, and predetermined wall 112 of the second rail 24 are omitted.

Specifically, the first rail 302 of the third embodiment has a first auxiliary feature 304, and the operating member 305 is provided with a second auxiliary feature 306 for cooperating with the first auxiliary feature 304, where the first auxiliary feature 304 and the second auxiliary feature 306 are both protrusions, but the implementation is not limited thereto. In addition, the operating member 305 has a locking feature 308, and the second rail 310 is provided with at least one predetermined portion, such as a first predetermined portion 312 and a second predetermined portion 314, for respectively locking with the locking feature 308, so that the operating member 305 can be maintained at the first operating position P1 or the second operating position P2 when being located at the first operating position P1 (as shown in fig. 30) or the second operating position P2 (as shown in fig. 31) relative to the second rail 310. In this embodiment, the locking feature 308 is a connecting member (screw or pin) passing through at least a portion of a slot 315 of the second rail 310, and the first predetermined portion 312 and the second predetermined portion 314 are located in the slot 315; preferably, the locking feature 308, the first predetermined portion 312 and/or the second predetermined portion 314 comprise guiding surfaces (e.g. inclined surfaces or cambered surfaces) so that the operating member 305 can easily leave the first operating position P1 or the second operating position P2.

Further, the slide assembly 300 may be in the fully extended state. The second rail 310 is at the first extended position E1 relative to the first rail 302, and the third rail 316 is at the open position K relative to the second rail 310. The sliding rail assembly 300 has a first length when the second rail 310 is in the first extended position E1. When the second rail 310 is in the first extended position E1 relative to the first rail 302, the blocking feature 318 can block the blocking portion 322 of the blocking member 320 in the first state S1 to prevent the second rail 310 from being displaced from the first extended position E1 toward the retracting direction D2 (as shown in fig. 30). On the other hand, the positioning member 324 contacts the guide portion 330 of the elastic seat 328 of the first rail 302 through the positioning portion 326.

The user can move the operating member 305 from the first operating position P1 (as shown in fig. 30) to the second operating position P2 (as shown in fig. 31) by applying a force F to the operating member 305, and the driving portion 332 of the operating member 305 can drive the blocking member 320 to switch (e.g. pivot) from the first state S1 to the second state S2 and maintain the blocking member 320 in the second state S2, such that the blocking feature 318 cannot block the blocking portion 322 of the blocking member 320 in the second state S2, so as to allow the second rail 310 to be displaced from the first extended position E1 to the retracted direction D2 (as shown in fig. 31) relative to the first rail 302. On the other hand, the blocking member 320 is coupled to the positioning member 324 (e.g. coupled to the positioning member 324 to pivot), so that the positioning member 324 is also in the second state S2. When the stopper 320 and the positioning member 324 are in the second state S2, the first elastic feature 334 and the second elastic feature 336 are respectively in a state of accumulating elastic force (as shown in fig. 31).

As shown in fig. 31 and 32, when the second rail 310 is displaced from the first extended position E1 to the folding direction D2 relative to the first rail 302, the blocking portion 322 of the blocking member 320 in the second state S2 and the positioning member 324 in the second state S2 fail to correspond to the positioning feature 338 of the first rail 302 via the positioning portion 326, and therefore, the blocking member 320 and the positioning member 324 can directly pass over the positioning feature 338 of the first rail 302 in the folding direction D2 (as shown in fig. 32), and when the second rail 310 is displaced to a predetermined stroke to the folding direction D2 relative to the first rail 302, the second auxiliary feature 306 of the operating member 305 contacts the first auxiliary feature 304 of the first rail 302 (as shown in fig. 32).

As shown in fig. 32 and 33, when the second rail 310 is further displaced in the retracting direction D2 relative to the first rail 302, the first auxiliary feature 304 generates a force to the operating member 305 when blocking the second auxiliary feature 306, so that the operating member 305 returns from the second operating position P2 (shown in fig. 32) to the first operating position P1 (shown in fig. 33) toward the opening direction D1, and the blocking member 320 and the positioning member 324 respectively release the elastic force from the first elastic feature 334 and the second elastic feature 336 to return from the second state S2 (shown in fig. 32) to the first state S1 (shown in fig. 33). In addition, the second rail 310 can be further moved to the retracted position R (e.g., a fully retracted position, as shown in fig. 33) relative to the first rail 302 in the retraction direction D2. Wherein, when the stopper 320 and the positioning member 324 are in the first state S1, the stopper 322 of the stopper 320 and the positioning portion 326 of the positioning member 324 can correspond to the positioning feature 338 of the first rail 302.

As shown in fig. 34 and 35, when the second rail 310 is displaced from the retracted position R to the opening direction D1 to a predetermined stroke relative to the first rail 302, the blocking portion 322 of the blocking member 320 in the first state S1 contacts the rear portion 338b of the positioning feature 338 of the first rail 302. Preferably, one of the rear portion 338b of the positioning feature 338 of the first rail 302 and the catch 322 of the catch 320 has a guiding feature (e.g., a ramp or a curved surface) that facilitates the catch 322 of the catch 320 to clear the rear portion 338b of the positioning feature 338 in the opening direction D1.

As shown in fig. 36 to 38, when the second rail 310 continues to move to the second extended position E2 in the opening direction D1 relative to the first rail 302, the stopper 320 is not in the first state S1 (as shown in fig. 36) by the contact action of the stopper 322 and the positioning feature 338, and the first elastic feature 334 accumulates an elastic force until the second rail 310 moves to the second extended position E2 in the opening direction D1 relative to the first rail 302 (as shown in fig. 37 and 38), and the stopper 320 is again in the first state S1 (as shown in fig. 37 and 38) in response to the release of the elastic force by the first elastic feature 334, and at this time, the stopper 322 of the stopper 324 in the first state S1 corresponds to two portions (such as the rear portion 338b and the front portion 338 a) of the positioning feature 338, respectively, so as to provide a blocking or blocking effect to prevent the second rail 310 from moving to the second rail 302 from the opening direction D2 or the second rail 302 (as shown in fig. 37 and 38). Similar to the first embodiment, when the second rail 310 is in the second extended position E2, the sliding rail assembly 300 has a second length smaller than the first length, so as to facilitate the third rail 316 being detached from the second channel of the second rail 310 in the opening direction D1. When the second rail 310 is at the second extended position E2 relative to the first rail 302, the operation member 305 or the third rail 316 can drive the blocking member 320 (and the positioning member 324) to move away from the second extended position E2 (since this part is disclosed in the above second embodiment, the details are omitted here for brevity).

It should be noted that, referring to fig. 31, once the blocking member 320 is driven by the operating member 305 to be in the second state S2, the blocking feature 318 cannot block the blocking portion 322 of the blocking member 320 in the second state S2, when the second rail 310 is displaced from the first extended position E1 to the retracting direction D2 relative to the first rail 302, if the operating member 305 is returned from the second operating position P2 to the first operating position P1 due to external or unexpected factors, the driving portion 332 of the operating member 305 cannot keep the blocking member 320 in the second state S2 (for example, the blocking member 320 and the positioning member 324 are returned to the first state S1 by the elastic forces of the first elastic feature 334 and the second elastic feature 336), so that the blocking portion 322 of the blocking member 320 and the positioning portion 326 of the positioning member 324 correspond to the positioning feature 338 of the first rail 302, by one of the front portion 338a of the positioning feature 338 of the first rail 302 and the positioning portion 326 of the positioning member 324 having a guiding feature (e.g., a slope or an arc surface), the positioning portion 326 of the positioning member 324 is facilitated to pass over the front portion 338a of the positioning feature 338 in the retracting direction D2 and the second elastic feature 336 is in a state of accumulating elastic force until the second rail 310 continues to be displaced to the second extended position E2 in the retracting direction D2 (as shown in fig. 37 and 38), the positioning member 324 is again in the first state S1 (as shown in fig. 37 and 38) in response to the second elastic feature 336 releasing the elastic force, at which time the positioning portion 326 of the positioning member 324 in the first state S1 and the blocking portion 322 of the blocking member 320 in the first state S1 correspond to two portions (e.g., the rear portion 338b and the front portion 338a, as shown in fig. 37), the second rail 310 can provide a blocking or locking effect to prevent the second rail 310 from being displaced from the second extended position E2 toward the opening direction D1 or the closing direction D2 (as shown in fig. 37 and 38) relative to the first rail 302.

The slide rail assembly 300 of the third embodiment of the present invention includes the following features:

1. the first rail 302 has a first auxiliary feature 304 and the operator 305 is provided with a second auxiliary feature 306; when the second rail 210 is displaced from the first extending position E1 to the retracting direction D2 to a predetermined stroke relative to the first rail 202, the second auxiliary feature 306 is blocked by the first auxiliary feature 304 to generate a force to the operating member 305, so that the operating member 305 on the second rail 210 can return from the second operating position P2 to the first operating position P1, and the blocking member 320 and the positioning member 324 release the elastic force from the second state S2 to the first state S1 through the first elastic feature 334 and the second elastic feature 336, respectively; when the second rail 310 is displaced to the second extending position E2 in the opening direction D1 relative to the first rail 302, the positioning portion 326 of the positioning member 324 in the first state S1 and the blocking portion 322 of the blocking member 320 in the first state S1 respectively correspond to the two portions of the positioning feature 338 to provide a blocking or locking effect, so as to prevent the second rail 310 from being displaced to the opening direction D1 or the closing direction D2 from the second extending position E2 relative to the first rail 302.

2. The operating member 305 has a locking feature 308, and the second rail 310 is provided with at least one predetermined portion, such as a first predetermined portion 312 and a second predetermined portion 314, for respectively locking with the locking feature 308, so that the operating member 305 can be maintained at the first operating position P1 or the second operating position P2 relative to the second rail 310.

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

1. The utility model provides a slide rail assembly, includes a first rail, a second rail, a fender piece, a setting element and an operating element, wherein, the second rail can be relative this first rail displacement, its characterized in that:

the first rail is provided with a blocking feature and a locating feature;

the baffle and the positioning piece are movably arranged on the second rail, so that the baffle and the positioning piece can be in one of a first state and a second state relative to the second rail;

the operating piece is used for operating one of the blocking piece and the positioning piece;

wherein, when the second rail is at a first extending position relative to the first rail, the blocking feature of the first rail can block the blocking piece at the first state, so as to prevent the second rail from moving from the first extending position to a folding direction;

When the second rail is at a second extending position relative to the first rail, the positioning piece and the blocking piece in the first state are respectively corresponding to two parts of the positioning feature of the first rail so as to prevent the second rail from being displaced relative to the first rail from the second extending position to an opening direction or a closing direction;

when the second rail is positioned at the first extension position, the sliding rail assembly has a first length; when the second rail is in the second extending position, the sliding rail assembly has a second length smaller than the first length;

the blocking feature is operable to move from a first operating position to a second operating position to cause the blocking member to transition from the first state to the second state and to retain the blocking member in the second state such that the blocking feature is unable to block the blocking member in the second state to allow the second rail to be displaced from the first extended position in the retracting direction.

2. The slide assembly of claim 1, wherein the stop moves the positioning member to the second state when the stop is moved from the first state to the second state.

3. The slide assembly of claim 2, wherein when the second rail is displaced from the first extended position in the retracting direction and the stopper and the positioning member are in the second state, the stopper and the positioning member can pass over the positioning feature in the retracting direction until the second rail continues to be displaced in the retracting direction to a predetermined stroke, a force is generated to the operating member by a contact between a first auxiliary feature of the first rail and a second auxiliary feature of the operating member, so that the operating member returns from the second operating position to the first operating position, and the stopper and the positioning member return from the second state to the first state by elastic forces of a first elastic feature and a second elastic feature, respectively.

4. The slide rail assembly of claim 3, wherein when the second rail is displaced from a retracted position to the open direction to the second extended position relative to the first rail, the positioning member and the blocking member in the first state are respectively corresponding to two portions of the positioning feature of the first rail, so as to prevent the second rail from being displaced from the second extended position to the open direction or the retracted direction relative to the first rail.

5. The slide assembly of claim 1 wherein the operating member is operatively mounted to the second rail.

6. The slide assembly of claim 5, wherein the operating member has a detent feature, and the second rail is provided with at least one predetermined portion for engaging with the detent feature, such that the operating member is capable of being held in at least one of the first operating position and the second operating position relative to the second rail.

7. The track assembly of claim 1, wherein when the second track is in the second extended position relative to the first track, the operating member is operable to move from a first operating position to a second operating position to move the blocking member and the positioning member from the first state to the second state such that the positioning member and the blocking member no longer correspond to two portions of the positioning feature of the first track for allowing the second track to be displaced relative to the first track from the second extended position in the opening direction or the closing direction.

8. The slide rail assembly of claim 1 further comprising a third rail, the second rail movably mounted between the first rail and the third rail; when the second rail is at the second extending position relative to the first rail, the third rail can drive the blocking piece to be no longer in the first state in the process of moving from an opening position relative to the second rail to the folding direction, and the blocking piece can be linked with the positioning piece to be no longer in the first state, so that the positioning piece and the blocking piece are no longer corresponding to two parts of the positioning feature of the first rail, and the second rail is allowed to move relative to the first rail from the second extending position to the opening direction or the folding direction.

9. The slide assembly of claim 1, wherein the stop member and the positioning member are pivotally connected to the second rail.

10. The utility model provides a slide rail assembly, includes a first rail, a second rail, a fender piece, a setting element and an operating element, wherein, the second rail can be relative this first rail displacement, its characterized in that:

the first rail is provided with a locating feature;

when the second rail is displaced to an extending position from a folding position to an opening direction relative to the first rail, the second rail is prevented from being displaced to the opening direction or the folding direction relative to the first rail by the two parts of the positioning feature of the first rail respectively corresponding to the positioning part and the blocking part in the first state;

the operation piece can be operated to move from a first operation position to a second operation position to drive the blocking piece and the positioning piece to be converted from the first state to the second state, so that the positioning piece and the blocking piece are not corresponding to two parts of the positioning feature of the first rail any more, and the second rail is allowed to move relative to the first rail from the extending position to the opening direction or the closing direction.

11. The slide assembly of claim 10 wherein the first rail is further provided with a blocking feature; when the second rail is displaced from the extended position to the opening direction to the other extended position relative to the first rail, the blocking feature can block the blocking piece in the first state so as to prevent the second rail from being displaced from the other extended position to the folding direction; when the second rail is at the other extending position, the sliding rail assembly has a first length; when the second rail is in the extended position, the sliding rail assembly has a second length smaller than the first length.

12. The track assembly of claim 11, wherein the operating member is operable to move from a first operating position to a second operating position to cause the stop to transition from the first state to the second state and to maintain the stop in the second state such that the blocking feature does not block the stop in the second state to allow the second track to be displaced from the other extended position in the retracting direction.

13. The slide assembly of claim 12, wherein the stop moves the positioning member to the second state when the stop is moved from the first state to the second state.

14. The track assembly of claim 13, wherein when the second track is displaced from the other extended position in the retracting direction and the stopper and the positioning member are in the second state, the stopper and the positioning member can pass over the positioning feature in the retracting direction until the second track continues to be displaced in the retracting direction to a predetermined stroke, a force is generated to the operating member by a contact between a first auxiliary feature of the first track and a second auxiliary feature of the operating member, so that the operating member returns from the second operating position to the first operating position, and the stopper and the positioning member return from the second state to the first state by elastic forces of a first elastic feature and a second elastic feature, respectively.

15. The slide assembly of claim 10 wherein the operating member is operatively mounted to the second rail.

16. The slide assembly of claim 15, wherein the operating member has a detent feature, and the second rail is provided with at least one predetermined portion for engaging the detent feature with each other to retain the operating member in at least the second operating position relative to the second rail.

17. The track assembly of claim 10, wherein when the second track is in the extended position relative to the first track, the operating member is operable to move from a first operating position to a second operating position to move the blocking member and the positioning member from the first state to the second state such that the positioning member and the blocking member no longer correspond to two portions of the positioning feature of the first track for allowing the second track to be displaced relative to the first track from the extended position in the opening direction or the closing direction.

18. The slide assembly of claim 10 further comprising a third rail, the second rail movably mounted between the first rail and the third rail; when the second rail is at the extending position relative to the first rail, the third rail can drive the blocking piece to be no longer at the first state in the process of moving from an opening position relative to the second rail to the folding direction, and the blocking piece can be linked with the positioning piece to be no longer at the first state, so that the positioning piece and the blocking piece are no longer corresponding to two parts of the positioning feature of the first rail, and the second rail is allowed to move relative to the first rail from the extending position to the opening direction or the folding direction.