CN114847691A

CN114847691A - Sliding rail assembly

Info

Publication number: CN114847691A
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: 2022-08-05
Anticipated expiration: 2041-02-04
Also published as: CN114847691B

Abstract

A slide rail assembly comprises 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 can be displaced relative to the first rail; the blocking piece and the positioning piece are movably mounted to the second rail, so that the blocking piece and the positioning piece can be in one of a first state and a second state relative to the second rail; the operating piece operates one of the stopper 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 member in the first state to prevent the second rail from moving from the first extending position to a folding direction; when the second rail is located at a second extending position relative to the first rail, the positioning element and the blocking element in the first state respectively correspond to two parts of the positioning feature of the first rail, so that the second rail can be prevented from moving from the second extending position to an opening direction or a folding direction relative to the first rail.

Description

Sliding rail assembly

Technical Field

The present invention relates to a slide rail assembly, and more particularly, to a slide rail assembly having a first rail and a second rail that have a blocking mechanism at an extended position relative to each other, and the blocking mechanism can be released by an operating member.

Background

For example, U.S. patent publication No. US 10,041,535B 2 discloses a slide rail assembly including a first rail, a second rail, a third rail, 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 one part of the first rail when the second rail is 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 moved from the first predetermined position to the second predetermined position by the user applying the force, although the locking member may be used to unlock the position of the first rail, the third rail is removed from the second rail by pushing the second rail into the first rail, which is not easy to be operated by a single person, and even when the operating member is used with a trolley, the chassis (chasses) equipped with the third rail can be removed from the second rail in a narrow space environment.

For example, U.S. patent publication No. US 9,681,749B 2 discloses a slide rail assembly that can be used in a narrow space, which discloses that an 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 slide rails are installed on one side of the chassis, there are four slide rails on two sides of the chassis, which is more disadvantageous for the operation of one person with both hands, and it is obvious that the mechanism for forcibly bringing the operating element from the predetermined position back to the initial position by the elastic force of the return elastic member does not satisfy the specific requirements in the market.

Disclosure of Invention

The present invention is directed to a slide assembly that releases a blocking mechanism by an operating member so that one slide rail can move away from an extended position relative to another slide rail.

According to an aspect of the present invention, 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 can be displaced relative to the first rail; the blocking piece and the positioning piece are movably mounted to the second rail, so that the blocking piece 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 stopper and the positioning piece; when the second rail is located at a first extending position relative to the first rail, the blocking feature can block the blocking piece located 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 located at a second extending position relative to the first rail, the positioning element and the blocking element in the first state respectively correspond to two parts of the positioning feature of the first rail, so as to prevent the second rail from moving relative to the first rail from the second extending position to an opening direction or a folding direction; when the second rail is at the first extending position, the slide rail assembly has a first length; when the second rail is in the second extended position, the slide rail assembly has a second length smaller than the first length.

According to another aspect of the present invention, 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 positioning feature; the second rail can be displaced relative to the first rail; the blocking piece and the positioning piece are movably mounted to the second rail, so that the blocking piece 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 stopper and the positioning piece; when the second rail moves from a retracted position to an extended position relative to the first rail in an opening direction, the positioning element and the blocking element in the first state respectively correspond to two parts of the positioning feature of the first rail, so as to prevent the second rail from moving from the extended position to the opening direction or the retracted direction relative to the first rail.

Drawings

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

fig. 1 is a perspective assembly view showing a first embodiment of a slide rail assembly in an extended state and including a first rail, a second rail and a third rail according to the present invention.

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

Fig. 3 is an enlarged view of the region a of fig. 2.

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

Fig. 5 is a perspective view of the second rail and the operating member thereof in the first operating position of the slide rail assembly according to the first embodiment of the present invention.

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

Fig. 7 is a perspective view of the second rail and the operating member thereof of the slide rail assembly of the first embodiment of the present invention at another perspective of the second operating position.

Fig. 8 is a schematic perspective view illustrating a slide rail assembly according to a first embodiment of the invention applied to a rack and carrying a load.

FIG. 9 is a schematic view of the slide rail assembly of the first embodiment of the present invention in the extended state having a first length, and the operating member is in the first operating position.

FIG. 10 is a schematic view of the slide rail assembly in the extended state and the operating member in the second operating position according to the first embodiment of the present invention.

Fig. 11 is a schematic view illustrating that the second rail of the slide rail assembly according to the first embodiment of the invention can move toward the retracting direction relative to the first rail.

Fig. 12 is a schematic view illustrating that the second rail of the slide rail assembly of the first embodiment of the invention is continuously displaced toward the retracting direction relative to the first rail.

Fig. 13 is an enlarged view of the region a of fig. 12.

Fig. 14 is a schematic view illustrating that the second rail of the slide rail assembly according to the first embodiment of the invention is further displaced toward the retracting direction relative to the first rail.

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

Fig. 16 is a schematic view illustrating the slide rail assembly of the first embodiment of the invention in another extended state with a second length.

Fig. 17 is a schematic view of the slide rail assembly of the first embodiment of the present invention in the extended state, and the third rail is detached from the second rail.

Fig. 18 is a schematic view illustrating the third rail of the slide rail assembly according to the first embodiment of the invention moving toward the retracting direction relative to the second rail.

Fig. 19 is a schematic view illustrating that the third rail of the slide rail assembly of the first embodiment of the present invention is continuously displaced toward the retracting direction relative to the second rail.

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

Fig. 21 is a schematic view illustrating the third rail of the slide rail assembly according to the first embodiment of the invention being displaced relative to the second rail in the opening direction.

Fig. 22 is a schematic view illustrating the third rail of the slide rail assembly according to the first embodiment of the invention being displaced relative to the second rail in the opening direction.

Fig. 23 is a schematic view illustrating the third rail of the slide rail assembly according to the first embodiment of the invention being further displaced in the opening direction relative to the second rail.

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

Fig. 25 is a schematic view illustrating the second rail of the slide rail assembly of the first embodiment of the invention in the second extended position relative to the first rail, and the operating member in the second operating position.

Fig. 26 is a partial schematic view illustrating that the second rail of the slide rail assembly according to the second embodiment of the invention is located at the second extended position relative to the first rail, and the blocking member and the positioning member are respectively blocked at two positions of the positioning feature.

Fig. 27 is a partial schematic view showing that the second rail of the slide rail assembly according to the second embodiment of the invention is located at the second extended position relative to the first rail, and the operating element can drive the blocking member and the positioning member to be respectively not blocked at two positions of the positioning feature.

Fig. 28 is a partial schematic view illustrating that the second rail of the slide rail assembly according to the second embodiment of the invention is located at the second extended position relative to the first rail, and the blocking member and the positioning member are respectively blocked at two positions of the positioning feature.

Fig. 29 is a partial schematic view showing that the second rail of the slide rail assembly according to the second embodiment of the invention is located at the second extended position relative to the first rail, and the blocking member and the positioning member can be driven by the third rail to be respectively not blocked at two positions of the positioning feature.

Fig. 30 is a schematic view of the slide rail assembly of the third embodiment of the invention in an extended state, and the blocking feature of the first rail blocks the blocking member of the second rail.

Fig. 31 shows a slide rail assembly in an extended state with the blocking feature of the first rail not blocking the blocking member of the second rail according to the third embodiment of the present invention.

Fig. 32 is a schematic view illustrating displacement of the second rail and the third rail of the slide rail assembly relative to the first rail in the retracting direction according to the third embodiment of the present invention.

Fig. 33 is a schematic view illustrating that the second rail and the third rail of the slide rail assembly of the third embodiment of the present invention continuously move in the retracting direction to the retracted position relative to the first rail.

Fig. 34 shows a schematic view of the second rail and the third rail of the slide rail assembly of the third embodiment of the invention moving toward the opening direction relative to the first rail.

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

Fig. 36 is a schematic view illustrating the second rail of the slide rail assembly of the third embodiment of the invention being continuously displaced in the opening direction relative to the first rail.

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

FIG. 38 is a schematic view of a slide rail assembly of 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 an embodiment of the present invention includes a first rail 22 and a second rail 24, and preferably further includes 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 slide 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 slide rail), the Y-axis direction is the transverse direction (or the lateral direction of the slide rail), and the Z-axis direction is the vertical direction (or the height direction of the slide rail).

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 defining a first channel for receiving the second rail 24. The first rail 22 is provided with a stop feature 32 (shown in figure 2). Preferably, the first rail 22 is further 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 positioning 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 order.

Preferably, the slide rail assembly 20 further includes an elastic seat 33 disposed on the first rail 22, the elastic seat 33 includes 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 both 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, and the blocking feature 32 is exemplified as a retaining wall (or standing wall), but is not limited in implementation; the longitudinal portion 25 is located between the stopping feature 32 and the guiding portion 27, and the guiding portion 27 is, for example, a slope 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 with the first release feature 34, the first release feature 34 is, for example, a protrusion protruding laterally (or transversely) relative to the longitudinal wall 30 of the first rail 22, and the front and rear portions of the first release feature 34 respectively have a first guiding section 44a and a second guiding section 44b, and the first guiding section 44a and the second guiding section 44b are inclined planes (or curved planes), but not limited in implementation.

Preferably, the slide rail 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 at a distance and are symmetrical to each other, and the first auxiliary portion 46 and the second auxiliary portion 48 have substantially the same structural configuration, and as explained with reference to the first auxiliary portion 46, 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 arc 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 in position. 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 stopper 58 and an operating member 60, and preferably also includes a positioning member 62 and a return resilient member 64. The second rail 24, the stopper 58, the operating member 60 and the return elastic member 64 can form a slide rail assembly. The stopper 58 and the positioning member 62 are movably mounted to the second rail 24. Here, the stopper 58 and the positioning element 62 are pivoted to the second side L2 of the longitudinal wall 56 of the second rail 24 through a first shaft 66 and a second shaft 68, respectively, for example and without limitation.

Preferably, the second rail 24 includes at least one hole communicating the first side L1 and the 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 stopper 58 includes a stop portion 55 penetrating the first hole H1, the stop portion 55 facing the longitudinal wall 30 of the first rail 22, and the stop portion 55 is configured to cooperate with the stop feature 32 of the first rail 22. On the other hand, the positioning member 62 includes a positioning portion 63 penetrating into the second hole H2, the positioning portion 63 faces the longitudinal wall 30 of the first rail 22, and the positioning portion 63 is used to match with the positioning feature 36 of the first rail 22. Here, the positioning portion 63 is taken as a column, but the implementation is not limited.

Preferably, the slide assembly 20 further includes a predetermined object 69 connected to the longitudinal wall 56 of the second rail 24, and the predetermined object 69 has a first elastic feature 70 and a second elastic feature 72 for providing elastic force to the stopper 58 and the positioning element 62, respectively.

Preferably, the second rail 24 and the positioning element 62 include mutually matched limiting structures, so that the positioning element 62 can move in a limited range relative to the second rail 24, and herein, the longitudinal wall 56 of the second rail 24 is configured with a corresponding portion 74 (for example, a convex body) penetrating a part of a limiting space 76 of the positioning element 62, which is an example, but not limited in implementation.

The operating member 60 is operatively mounted to the second rail 24, and the operating member 60 is used for operating the stopper 58 and the positioning member 62, or for operating one of the stopper 58 and the positioning member 62.

Preferably, the operating member 60 is located on the 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 operating 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 element 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 stopper 58.

Preferably, the second rail 24 and the operating member 60 include mutually matched limiting features, so that the operating member 60 can longitudinally move in a limited range relative to the second rail 24, and here, 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 the at least one connecting member 86 through a part of the at least one long hole 84, which is taken as an example and is not limited in implementation.

The return elastic member 64 is used to provide a return elastic force to the operation member 60. Here, the two ends of the return elastic member 64 are connected to the operation member 60 and (the longitudinal wall 56 of) the second rail 24, respectively, for example, but the implementation is not limited thereto.

Preferably, the operating element 60 is provided with a detent feature 88 (as shown in fig. 3), and here, taking the example that the slide assembly 20 further comprises a resilient member 90 connected to the operating element 60, the resilient member 90 comprises a connecting section 92 and a resilient section 94, the connecting section 92 is connected to the extending portion 82 of the operating element 60, and the resilient section 94 is connected 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 ramp or a curved surface (as shown in fig. 3).

Preferably, the resilient section 94 of the resilient member 90 further comprises a release feature 98, and the release feature 98 is, for example, a protrusion, and the front and rear portions of the release feature 98 have a first guide feature 100a and a second guide feature 100b, such as, for example, a ramp or a curved surface (as shown in fig. 3).

As shown in fig. 4 and 5, both the stopper 58 and the positioning element 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 (shown in fig. 4 and 5) relative to the second rail 24.

Preferably, the stopper 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 element 60 (as shown in fig. 4); and, the stop 55 is adjacent to the actuating portion 104 (shown in fig. 4), and the stop 55 extends to the first side L1 (shown in fig. 5) of the second rail 24. The first resilient feature 70 provides a resilient force to the stopper 58, and the stopper 58 is maintained 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 (as shown in fig. 5) of the second rail 24. The second elastic feature 72 provides an elastic force to the positioning element 62, and the positioning element 62 is maintained in the first state S1 (shown in fig. 4).

Preferably, the trip feature 98 of the resilient section 94 of the resilient member 90 passes through a corresponding hole 110 (shown in FIG. 5) of the extension 82 of the operating member 60, and the trip feature 98 is configured to mate 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 located 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 located at the first operating position P1 relative to the second rail 24, the latching feature 88 of the resilient member 90 corresponds to the first corresponding space M1 (as shown in fig. 5), and the latching feature 88 of the resilient member 90 is adjacent to a first wall portion 112a of the predetermined wall 112.

As shown in fig. 6 and 7, a user can apply a force F to (the operating portion 78 of) the operating member 60, so that the operating member 60 can move from the first operating position P1 to a second operating position P2 relative to the second rail 24, in the process, the operating member 60 contacts the contact portion 102 of the stopper 58 through the driving portion 80 to drive the stopper 58 to move (e.g., pivot) from the first state S1 to a second state S2 (as shown in fig. 6), preferably, the stopper 58 contacts the positioning portion 63 of the positioning member 62 through 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 element 60 is in the second operating position P2, the return elastic element 64 can accumulate a return elastic force F' (as shown in fig. 7) returning to the first operating position P1, and the latching feature 88 of the elastic member 90 corresponds to the second corresponding space M2, and the operating element 60 is latched to a predetermined portion of the second rail 24 through the latching feature 88 (for example, the latching feature 88 is latched to a second wall portion 112b of the predetermined wall 112 of the second rail 24) to keep the operating element 60 in 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 latching feature 88 can contact the first wall portion 112a (shown in fig. 5) via the guiding surface 96, which helps the latching feature 88 to pass over the predetermined wall 112 until the latching feature 88 is located in the second corresponding space M2 (shown in fig. 7), the latching feature 88 can latch with the second wall portion 112b (shown in fig. 7) of the predetermined wall 112 of the second rail 24.

Preferably, when the operating member 60 is in the second operating position P2, the operating member 60 is used to keep the stopper 58 and the positioning member 62 in the second state S2 (as shown in fig. 6); the operating member 60 contacts the positioning member 62 through the stopper 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 can be mounted to a frame 116 via the slide rail assembly 20. The slide rail 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 to support the carrying object 114, so that the carrying object 114 can be moved from the inside of the frame 116 to the outside of the frame 116 through the third rail 26.

As shown in fig. 9, the slide rail assembly 20 is in the fully extended state. Wherein the second rail 24 is located at the first extended position E1 relative to the first rail 22, and the third rail 26 is located at the open position K relative to the second rail 24. Preferably, at least one sliding assisting device is movably installed between each two sliding rails to facilitate the smoothness of the displacement of each two sliding rails relative to each other, for example, a first sliding assisting device 118 is installed between the first rail 22 and the second rail 24, a second sliding assisting device 120 is installed between the second rail 24 and the third rail 26, and a plurality of balls B are configured on the sliding assisting

devices

118, 120. It should be noted that when the second rail 24 is located at the first extending position E1 relative to the first rail 22, the sliding rail assembly 20 has a first length J1, so that there is only a first distance X1 between the front end portion 26a of the third rail 26 and an object 122 (such as 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 located 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 member 62 contacts the guide portion 27 of the elastic seat 33 of the first rail 22 through the positioning portion 63. In addition, when the operating element 60 is in the first operating position P1, the return elastic element 64 is not in a state of accumulating the return elastic force, and the latching feature 88 of the elastic segment 94 of the elastic member 90 is adjacent to the first wall portion 112a of the predetermined wall 112 (this portion can also be referred to as fig. 5).

As shown in fig. 10, a user can apply the force F to the operating portion 78 of the operating member 60 to move the operating member 60 from the first operating position P1 to the second operating position P2 and can drive the stopper 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 stopper 58 in the second state S2, so as to allow the second rail 24 to be displaced from the first extending position E1 to the retracting direction D2 relative to the first rail 22. On the other hand, the stopper 58 is linked with the positioning element 62, so that the positioning element 62 is in the second state S2. When the stopper 58 and the positioning element 62 are in the second state S2, the first elastic feature 70 and the second elastic feature 72 are respectively in a state of accumulated elastic force (this portion can also be referred to as fig. 6). In addition, when the operating element 60 is in the second operating position P2, the return elastic element 64 is in a state of accumulating the return elastic force F', and the latching feature 88 of the elastic section 94 of the elastic member 90 is latched to the second wall portion 112b of the predetermined wall 112 of the second rail 24 to keep the operating element 60 in the second operating position P2 (this portion can also be referred to as fig. 7).

As shown in fig. 11, when the second rail 24 is displaced from the first extended position E1 to the retracted direction D2 relative to the first rail 22, the (second guide feature 100b of the) releasing feature 98 of the elastic member 90 of the operating member 60 contacts with the (first guide section 44a of the) first releasing feature 34 of the first rail 22, so as to drive the elastic section 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 continuously displaced relative to the first rail 22 in the retracting direction D2. Once the latching feature 88 is no longer latched to the second wall portion 112b of the predetermined wall 112 of the second rail 24, the restoring elastic force F' is released by the restoring elastic member 64 to the operating member 60, so that the operating member 60 can return from the second operating position P2 to the first operating position P1, and the latching feature 88 returns to the position adjacent to the first wall portion 112a of the predetermined wall 112 of the second rail 24 (as shown in fig. 13, this portion can also refer to fig. 5), and the stopper 58 and the positioning member 62 respectively return from the second state S2 to the first state S1 in response to the releasing elastic forces of the first elastic feature 70 and the second elastic feature 72.

As shown in fig. 14 and 15, when the second rail 24 is further displaced toward the retracted direction D2 to a second extended position E2 relative to the first rail 22, the positioning member 62 pivots at an angle by the guiding of the positioning portion 63 along the first guiding structure 50 (inclined surface or arc surface) of the first auxiliary portion 46, such that the second resilient feature 72 is in a state of accumulated resilient force (as shown in fig. 14), until the second rail 24 is in the second extended position E2 (shown in conjunction with fig. 16), the positioning element 62 is in the first state S1 in response to the second elastic feature 72 releasing the elastic force, so that the positioning portion 63 of the positioning element 62 can be engaged with the positioning feature 36 of the first rail 22, for example, the positioning portion 63 of the positioning member 62 is blocked between the first auxiliary portion 46 and the second auxiliary portion 48, for preventing the second rail 24 from moving relative to the first rail 22 from the second extended position E2 to the closing direction D2 or the opening direction D1.

As shown in fig. 16 and 17, when the second rail 24 is located at the second extending position E2 relative to the first rail 22, the slide rail assembly 20 has a second length J2 smaller than the first length J1, so 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 detachment of the third rail 26 from the second channel of the second rail 24 in the opening direction D1 (as shown in fig. 17).

As shown in fig. 18-20, 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 extending position E2 to a retracted position D2 (e.g. a fully retracted position) relative to the first rail 22, the third rail 26 can be displaced from the opening position K to the retracted direction D2 until the third rail 26 (e.g. the rear end 26b) 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), so that the stopper 58 is no longer in the first state S1, and the stopper 58 can link the positioning member 62 and is no longer in the first state S1, so that the positioning portion 63 of the positioning member 62 is released from the positioning feature 36 (as shown in fig. 19) to allow the second rail 24 to be displaced from the second extending position E2 to the retracted direction D2 relative to the first rail 22, until the slide rail assembly 20 is in a fully retracted state (as shown in fig. 20), at this time, the second rail 24 is in the retracted position R relative to the first rail 22, and the third rail 26 is also in a predetermined retracted position relative to the second rail 24. It should be noted that, as shown in fig. 19 and 20, the stopper 58 and the positioning element 62 are respectively supported by the second wall 29b and the first wall 29a of the third rail 26 to keep the stopper 58 and the positioning element 62 in the non-first state S1 (i.e., the stopper 58 and the positioning element 62 are not in the first state S1), and the first elastic feature 70 and the second elastic feature 72 are in the state of accumulated elastic force, it is noted that the positioning element 62 can be kept in the non-first state S1 because the first wall 29a of the third rail 26 blocks the moving path (pivoting path) of the positioning element 62.

As shown in fig. 20-23, the third rail 26 includes a synchronization feature 126 (e.g., but not limited to, an aperture wall) disposed on the second wall 29b of the third rail 26. Further, when the third rail 26 is displaced to a predetermined stroke from the retracted position (as shown in fig. 20) to the opening direction D1 relative to the second rail 24, the synchronization feature 126 of the third rail 26 corresponds to the auxiliary section 124 of the catch 58, such that the catch 58 can be engaged with the synchronization feature 126 of the third rail 26 through the auxiliary section 124 in response to the releasing of the elastic force of the first elastic feature 70, so as to allow the second rail 24 to be displaced to the opening direction D1 synchronously with the third rail 26 (as shown in fig. 21), and when synchronously displaced to a predetermined stroke in the opening direction D1, the catch 55 of the catch 58 follows 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 as to deflect the catch 58 at an angle, such that the auxiliary section 124 of the catch 58 is disengaged from the synchronization feature 126 of the third rail 26, so as to release the synchronization relationship between the second rail 24 and the third rail 26 ((as shown in fig. 22), until the third rail 26 is displaced in the opening direction D1 relative to the second rail 24, so that the second wall 29b and the first wall 29a of the third rail 26 do not support the stopper 58 and the positioning element 62, respectively, and when the second rail 24 is displaced in the first extending position E1 relative to the first rail 22, the stopper 58 is in the first state S1, and the blocking portion 55 of the stopper 58 is blocked by the blocking feature 32 of the first rail 22, so as to prevent the second rail 24 from being displaced in the retracting direction D2 from the first extending position E1 (as shown in fig. 23, this portion can also refer to fig. 9).

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

When the second rail 24 is displaced from the second extending position E2 to the retracted position D2 in the retracting direction R, the elastic member 90 can be driven by the second releasing feature 38 of the first rail 22 to release the latching feature 88 from the predetermined portion of the second rail 24, so that the operating element 60 can return from the second operating position P2 to the first operating position P1 by the returning elastic force F' of the returning elastic element 64 (the technical principle of this portion is substantially the same as that of fig. 11, and is not described herein again).

The slide assembly 20 of the first embodiment of the present invention includes a feature that the operating member 60 can be retained at the second operating position P2 by the latching feature 88 being latched to the predetermined portion of the second rail 24, and once the latching feature 88 is no longer latched to the predetermined portion of the second rail 24, the restoring elastic force provided by the restoring elastic member 64 can allow the operating member 60 to return from the second operating position P2 to the first operating position P1.

Fig. 26 shows a slide rail assembly 200 according to a second embodiment of the present invention. The slide assembly 200 of the second embodiment is substantially different from the slide assembly 20 of the first embodiment in that: the locating feature 204 of the first rail 202 may be a protrusion that protrudes transversely (laterally) relative to the longitudinal wall 205 of the first rail 202, and the locating portion 208 of the locating member 206 may be an extension leg.

Further, the longitudinal wall 212 of the second rail 210 has a first hole H1 'and a second hole H2' 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 not described herein), wherein the blocking portion 216 of the blocking member 214 penetrates into the first hole H1 ', and the positioning portion 208 of the positioning member 206 penetrates into the second hole H2'.

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

As shown in fig. 26 and 27, when the second rail 210 is in the second extended position E2 relative to the first rail 202, a user can release the second rail 210 from the blocking or catching relationship with the first rail 202 by operating members 218. Further, the user can apply the force F to the operating element 218 to move 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 stopper 214 to switch from the first state S1 to the second state S2, so that the stopper 214 drives the positioning element 206 to switch from the first state S1 to the second state S2, and the positioning portion 208 of the positioning element 206 and the blocking portion 216 of the stopper 214 no longer correspond to two portions (e.g., the rear portion 204b and the front portion 204a) of the positioning feature 204 of the first rail 202, so as to allow the second rail 210 to move from the second extending position E2 to the opening direction D1 or the retracting direction D2 relative to the first rail 202.

As shown in fig. 28 and 29, when the second rail 210 is located at the second extending position E2 relative to the first rail 202, the user can also displace the third rail 222 from the opening position K to the retracting direction D2 through the third rail 222 until the third rail 222 (e.g., the rear end 222b) contacts the auxiliary section 224 of the stopper 214 (as shown in fig. 28), so that the stopper 214 is driven to be no longer in the first state S1, and the stopper 214 can link the positioning element 206 to be no longer in the first state S1 (as shown in fig. 29), so that the positioning portion 208 of the positioning element 206 and the blocking portion 216 of the stopper 214 are no longer opposite to two portions (e.g., the rear portion 204b and the front portion 204a) 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 retracting direction D2 relative to the first rail 202 until the slide rail 200 is completely retracted, for example, the second rail 210 is in the retracted position R relative to the first rail 202, and the third rail 222 is also in a predetermined retracted position relative to the second rail 210.

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

Fig. 30 and 31 show a slide rail assembly 300 according to a third embodiment of the present invention. The slide rail assembly 300 of the third embodiment is substantially different from the slide rail assembly 20 of the first embodiment: the aforementioned return elastic member 64, the elastic member 90, and the predetermined wall 112 of the second rail 24 are omitted.

Specifically, the first rail 302 of the third embodiment has a first assistant feature 304, and the operating member 305 is provided with a second assistant feature 306 for cooperating with the first assistant feature 304, wherein the first assistant feature 304 and the second assistant feature 306 are protrusions, but the implementation is not limited thereto. In addition, the operating element 305 has a latching 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 latching with the latching feature 308, respectively, so that the operating element 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 (shown in fig. 30) or the second operating position P2 (shown in fig. 31) relative to the second rail 310. In this embodiment, the latching feature 308 is a connecting member (screw or pin) passing through at least a portion of an elongated hole 315 of the second rail 310, and the first predetermined portion 312 and the second predetermined portion 314 are located within the elongated hole 315; preferably, the detent feature 308, the first predetermined portion 312 and/or the second predetermined portion 314 include a guiding surface (e.g., a slope or a curved surface) to facilitate the operation member 305 to leave the first operation position P1 or the second operation position P2.

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

A user can move the operating element 305 from a first operating position P1 (shown in fig. 30) to a second operating position P2 (shown in fig. 31) by applying a force F to the operating element 305, and the driving portion 332 of the operating element 305 can drive the stopper 320 to be converted (e.g., pivoted) from the first state S1 to the second state S2 and keep the stopper 320 in the second state S2, so that the blocking feature 318 cannot block the blocking portion 322 of the stopper 320 in the second state S2, so as to allow the second rail 310 to be displaced from the first extending position E1 to the retracting direction D2 (shown in fig. 31) relative to the first rail 302. On the other hand, the stopper 320 is linked with the positioning element 324 (for example, the positioning element 324 is linked to pivot), so that the positioning element 324 is also in the second state S2. When the stopper 320 and the positioning element 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 extending position E1 to the retracting 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 through the positioning portion 326, so that the blocking member 320 and the positioning member 324 can directly pass over the positioning feature 338 of the first rail 302 in the retracting direction D2 (as shown in fig. 32), and when the second rail 310 is displaced to a predetermined stroke in the retracting direction D2 relative to the first rail 302, the second assistant feature 306 of the operating member 305 contacts the first assistant 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 towards the retracting direction D2 relative to the first rail 302, a force is generated to the operating element 305 when the first auxiliary feature 304 stops the second auxiliary feature 306, so that the operating element 305 returns from the second operating position P2 (shown in fig. 32) towards the opening direction D1 to the first operating position P1 (shown in fig. 33), and the stopper 320 and the positioning element 324 respectively return from the second state S2 (shown in fig. 32) to the first state S1 (shown in fig. 33) by releasing the elastic force of the first elastic feature 334 and the second elastic feature 336. In addition, the second rail 310 can be continuously displaced relative to the first rail 302 in the retracting direction D2 to a retracted position R (e.g., a fully retracted position, as shown in fig. 33). When the stopper 320 and the positioning element 324 are in the first state S1, the blocking portion 322 of the stopper 320 and the positioning portion 326 of the positioning element 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 to a predetermined stroke from the retracted position R to the opening direction D1 relative to the first rail 302, the stopping portion 322 of the stopper 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 stop portion 322 of the stop 320 has a guiding feature (e.g., a slope or a curve) that facilitates the stop portion 322 of the stop 320 to pass over the rear portion 338b of the positioning feature 338 in the opening direction D1.

As shown in fig. 36 to 38, during the process that the second rail 310 is continuously displaced to the second extended position E2 in the opening direction D1 relative to the first rail 302, the stopper 320 is no longer in the first state S1 (as shown in fig. 36) by the contact between the stopper 322 and the positioning feature 338, at this time, the first elastic feature 334 accumulates an elastic force until the second rail 310 is displaced to the second extended position E2 in the opening direction D1 relative to the first rail 302 (as shown in fig. 37 and 38), the stopper 320 is again in the first state S1 (as shown in fig. 37 and 38) in response to the elastic force released by the first elastic feature 334, at this time, the positioning portion 326 of the stopper 324 in the first state S1 and the stopper 322 of the stopper 320 in the first state S1 respectively correspond to two portions (for example, the rear portion 338b and the front portion 338a, as shown in fig. 37) can provide a blocking or catching effect to prevent the second rail 310 from being displaced from the second extended position E2 toward the opening direction D1 or the collapsing direction D2 relative to the first rail 302 (as shown in fig. 37 and 38). Like the first embodiment, when the second rail 310 is in the second extended position E2, the slide assembly 300 has a second length less than the first length, which facilitates the detachment of the third rail 316 from the second channel of the second rail 310 in the opening direction D1. When the second rail 310 is located at the second extending position E2 relative to the first rail 302, the operating element 305 or the third rail 316 can also drive the stopper 320 (and the positioning element 324) to enable the second rail 310 to move away from the second extending position E2 (for brevity, the description is omitted).

It should be noted that referring to fig. 31, once the stopper 320 is driven by the operating element 305 to be in the second state S2, so that the blocking feature 318 cannot block the blocking portion 322 of the stopper 320 in the second state S2, when the second rail 310 is displaced from the first extending position E1 to the retracting direction D2 relative to the first rail 302, if the operating element 305 returns from the second operating position P2 to the first operating position P1 due to external or unexpected factors, at this time, the driving portion 332 of the operating element 305 cannot keep the stopper 320 in the second state S2 (for example, the stopper 320 and the positioning element 324 return to the first state S1 through the elastic forces of the first elastic feature and the second elastic feature 336), so that the blocking portion 322 of the stopper 320 and the positioning portion of the positioning element 324 correspond to the positioning feature 326 of the first rail 326, and in this state, one of the positioning features 338a of the positioning element 324 and the front portion 338a of the positioning element 324 of the first rail 302 has the positioning feature 326 with the positioning feature 326 a The guiding feature (e.g., a slope or a curved surface) helps the positioning portion 326 of the positioning member 324 to pass 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 accumulated elastic force, until the second rail 310 continues to be displaced to the second extending 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 this time, the positioning portion 326 of the positioning member 324 in the first state S1, and the stop 322 of the catch 320 in the first state S1 respectively corresponding to two portions of the positioning feature 338 (e.g., the rear portion 338b and the front portion 338a, as shown in fig. 37) can provide a blocking or catching 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 according to the third embodiment of the present invention includes the following features:

1. the first rail 302 has a first assist feature 304, and the operating member 305 has a second assist feature 306; when the second rail 210 moves to a predetermined stroke from the first extending position E1 to the retracting direction D2 relative to the first rail 202, the first auxiliary feature 304 stops the second auxiliary feature 306 to generate a force on the operating element 305, so that the operating element 305 on the second rail 210 can return to the first operating position P1 from the second operating position P2, and the stopper 320 and the positioning element 324 respectively return to the first state S1 from the second state S2 by releasing the elastic force of the first elastic feature 334 and the second elastic feature 336; when the second rail 310 is moved to the second extending position E2 along 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 provide blocking or catching effects corresponding to two portions of the positioning feature 338, so as to prevent the second rail 310 from being moved from the second extending position E2 to the opening direction D1 or the retracting direction D2 relative to the first rail 302.

2. The operating member 305 has a latching 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 latching with the latching feature 308, respectively, so that the operating member 305 can be kept at the first operating position P1 or the second operating position P2 relative to the second rail 310.

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

Claims

1. A slide rail assembly comprises a first rail, a second rail, a stopper, a positioning member and an operating member, wherein the second rail can move relative to the first rail, and the slide rail assembly is characterized in that:

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

the blocking piece and the positioning piece are movably mounted to the second rail, so that the blocking piece 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 stopper and the positioning piece;

when the second rail is located at a first extending position relative to the first rail, the blocking feature of the first rail can block the blocking piece in 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 located at a second extending position relative to the first rail, the positioning element and the blocking element in the first state respectively correspond to two parts of the positioning feature of the first rail, so as to prevent the second rail from moving relative to the first rail from the second extending position to an opening direction or a folding direction;

when the second rail is at the first extending position, the slide rail assembly has a first length; when the second rail is in the second extended position, the slide rail assembly has a second length smaller than the first length.

2. The slide rail assembly of claim 1 wherein the operating member is operable to move from a first operating position to a second operating position to move the blocking member from the first state to the second state and to maintain the blocking member in the second state such that the blocking feature does not block the blocking member in the second state to allow the second rail to move from the first extended position to the retracted position.

3. The slide rail assembly of claim 2, wherein when the stopper is switched from the first state to the second state, the stopper drives the positioning element to the second state.

4. The slide rail assembly according to claim 3, wherein when the second rail is displaced from the first extended position to the retracting direction and the stopper and the positioning element are in the second state, the stopper and the positioning element can cross the positioning feature in the retracting direction until the second rail continues to be displaced to a predetermined stroke in the retracting direction, the first auxiliary feature of the first rail and the second auxiliary feature of the operating element are in contact with each other to generate an acting force to the operating element, so that the operating element returns from the second operating position to the first operating position, and the stopper and the positioning element return from the second operating position to the first operating position by elastic forces of a first elastic feature and a second elastic feature, respectively.

5. The slide rail assembly of claim 4 wherein when the second rail moves from a retracted position to the open position to the second extended position relative to the first rail, the positioning element and the blocking element in the first state respectively correspond to two portions of the positioning feature of the first rail to prevent the second rail from moving from the second extended position to the open position or the retracted position relative to the first rail.

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

7. The slide rail assembly of claim 6 wherein the operating member has a detent feature and the second rail has at least one predetermined portion for engaging the detent feature such that the operating member is retained relative to the second rail in at least one of the first operating position and the second operating position.

8. The slide rail assembly according to claim 1, wherein when the second rail is located at the second extending position relative to the first rail, the operating member is operable to move from a first operating position to a second operating position to drive the blocking member and the positioning member to change 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 rail, so as to allow the second rail to move from the second extending position to the opening direction or the retracting direction relative to the first rail.

9. The slide rail assembly of claim 1 further comprising a third rail, the second rail being movably mounted between the first rail and the third rail; when the second rail is located at the second extending position relative to the first rail, the third rail can drive the blocking piece to be no longer located 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 located 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 from the second extending position relative to the first rail to the opening direction or the folding direction.

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

11. A slide rail assembly comprises a first rail, a second rail, a stopper, a positioning member and an operating member, wherein the second rail can move relative to the first rail, and the slide rail assembly is characterized in that:

the first rail is provided with a positioning feature;

when the second rail moves from a retracted position to an extended position relative to the first rail in an opening direction, the positioning element and the blocking element in the first state respectively correspond to two parts of the positioning feature of the first rail, so as to prevent the second rail from moving from the extended position to the opening direction or the retracted direction relative to the first rail.

12. The slide rail assembly of claim 11, wherein the operating member is operable to move from a first operating position to a second operating position to drive the blocking member and the positioning member to change from the first state to the second state, such that the positioning member and the blocking member no longer correspond to two locations of the positioning feature of the first rail, thereby allowing the second rail to move relative to the first rail from the extended position toward the opening direction or the retracting direction.

13. The slide rail assembly of claim 12 wherein the first rail is further provided with a stop feature; when the second rail moves from the extending position to the opening direction to another extending 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 moving from the another extending 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 slide rail assembly has a second length that is less than the first length.

14. The slide rail assembly of claim 13 wherein the operating member is operable to move from a first operating position to a second operating position to move the blocking member from the first state to the second state and to maintain the blocking member in the second state such that the blocking feature does not block the blocking member in the second state to allow the second rail to move from the extended position to the retracted position.

15. The slide rail assembly of claim 14 wherein the stopper drives the positioning element to the second state when the stopper is switched from the first state to the second state.

16. The slide rail assembly according to claim 15, wherein when the second rail is displaced from the other extending position to the retracting direction and the stopper and the positioning element are in the second state, the stopper and the positioning element can move past the positioning feature in the retracting direction until the second rail continues to move to a predetermined stroke in the retracting direction, a first auxiliary feature of the first rail and a second auxiliary feature of the operating element contact each other to generate an acting force on the operating element, so that the operating element returns from the second operating position to the first operating position, and the stopper and the positioning element return from the second operating position to the first operating position by elastic forces of a first elastic feature and a second elastic feature, respectively.

17. The slide rail assembly of claim 11 wherein the operating member is operatively mounted to the second rail.

18. The slide rail assembly of claim 17 wherein the operating member has a detent feature and the second rail has at least one predetermined portion for interengaging the detent feature to retain the operating member in at least the second operative position relative to the second rail.

19. The slide rail assembly according to claim 11, wherein when the second rail is located at the extended position relative to the first rail, the operating member is operable to move from a first operating position to a second operating position to drive the blocking member and the positioning member to change 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 rail, so as to allow the second rail to move from the extended position to the opening direction or the retracting direction relative to the first rail.

20. The slide rail assembly of claim 11 further comprising a third rail, the second rail being movably mounted between the first rail and the third rail; when the second rail is located at the 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 characteristic of the first rail, and the second rail is allowed to move from the extending position to the opening direction or the folding direction relative to the first rail.