CN113455843B - Slide rail assembly - Google Patents

Abstract

The invention relates to a slide rail assembly, which comprises a first rail, a second rail, a contact structure and a locking device. The second rail can move relative to the first rail; the contact structure is disposed on the second rail. The lock device is arranged on the first rail and comprises a working piece which can be in a blocking state or an unblocking state relative to the first rail; when the second rail is at a folding position relative to the first rail, the contact structure can be blocked by the workpiece in the blocking state, so that the second rail is prevented from moving from the folding position to an opening direction relative to the first rail.

Description

Slide rail assembly

technical field

The present invention relates to a sliding rail, in particular to a sliding rail assembly with a locking device.

Background technique

Approved US Patent Publication No. US 6,883,884 B2 by Chen et al. discloses a lock assembly for a slide rail assembly. The slide rail assembly includes a first rail and a second rail, and the first rail can be in a retracted position and an extended position relative to the second rail. Wherein, the second rail is provided with a lock seat, and the first rail is provided with a lock assembly. When the first rail is in the retracted position relative to the second rail, the first rail can be locked on the lock seat of the second rail through the lock assembly, so that the first rail is fixed in the retracted position ; Once the lock assembly is unlocked from the lock seat, it is used to allow the first rail to move from the retracted position to the opening direction to the extended position.

Wherein, since the lock assembly is arranged at the front end of the first rail, and the lock seat is arranged at the front end of the second rail, this also means that when the second rail is fixed to a cabinet (or rack) , and when the first rail is loaded with a carrier (such as a drawer or electronic equipment), once the first rail is in the folded position relative to the second rail, anyone can remove the slide rail assembly or the cabinet ( or carrier) to operate the lock assembly so that the lock assembly is unlocked from the lock seat. On the other hand, this configuration must be matched with a special slide rail section to achieve the lock function after the slide rail is folded.

However, with the different market demands, sometimes it is not desirable that the lock assembly and the lock base be arranged at the front end of the slide rail assembly. Therefore, how to develop a different slide rail product will allow the market to have more Different options have become a topic worthy of discussion.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a slide rail assembly with a locking device.

According to an aspect of the present invention, a slide rail assembly includes a first rail, a second rail, a contact structure, and a lock device. The first rail has a front part and a rear part; the second rail is displaceable relative to the first rail, the second rail has a front part and a rear part; the contact structure is disposed adjacent to the first rail One of the rear part and the rear part of the second rail; the lock device is arranged adjacent to the other of the rear part of the first rail and the rear part of the second rail, and the lock device includes a working The piece can be in one of a blocking state and an unblocking state; wherein, when the second rail is in a retracted position relative to the first rail, the contact structure can be blocked by the working piece in the blocking state, It is used to prevent the displacement of the second rail relative to the first rail from the retracted position to an opening direction; wherein, when the work piece is in the unblocked state, the work piece fails to block the contact structure, so as to allow the work piece The second rail is displaced from the retracted position to the opening direction relative to the first rail.

Preferably, the contact structure is disposed adjacent to the rear of the second rail, and the locking device is disposed adjacent to the rear of the first rail.

Preferably, the lock device further includes an operating member that is movable relative to the working member; when the operating member is displaced from a first position to a second position, the operating member is used to drive the working member to switch from the blocking state to the unblocked state.

Preferably, the lock device further includes an elastic feature for providing an elastic force to the work piece.

Preferably, the operating member includes a driving part; when the operating member is displaced from the first position to the second position, the operating member can drive the working member to switch from the blocking state to the unblocking state through the driving part state, and the driving part is used to support the work piece to remain in the unblocked state.

Preferably, the lock device further includes a base, and the base has a predetermined feature; the operating member is movably mounted to the base, and the operating member is provided with an elastic arm; when the operating member is removed from the first When the position is displaced to the second position, the operating member can be locked to the predetermined feature by at least one latching portion of the elastic arm, so as to maintain the operating member in the second position.

Preferably, the lock device further includes an elastic member disposed between the base and the operating member, and the second rail further includes an unlocking structure; when the second rail is retracted from the first rail relative to the first rail During the process of position displacement in the opening direction, the second rail can drive the elastic arm through the unlocking structure, so that at least one latching part of the elastic arm is released from the predetermined feature of the base, so that the operating member can be returned. An elastic force of the elastic member should be able to return to the first position from the second position, and the driving part of the operating member no longer supports the working member, so that the elastic force of the working member responding to the elastic feature can be maintained in the blocking state .

Preferably, the contact structure includes a guide feature; when the second rail is displaced relative to the first rail from an extended position to a retracted direction to the retracted position, the second rail passes through the guide The feature can return to the collapsed position over the work piece.

Preferably, the base is provided with at least one lug, and the work piece is pivotally connected to the at least one lug through a shaft.

Preferably, the locking device is provided on a bracket device adjacent to the rear of the first rail, and the bracket device includes a longitudinal wall and at least one mounting piece adjacent to the longitudinal wall; the base is connected to the a longitudinal wall, and one of the operating member and the base is provided with at least one longitudinal guide portion, the operating member can be longitudinally displaced relative to the base from the first position to the second position.

According to another aspect of the present invention, a slide rail assembly includes a first rail, a second rail, a contact structure and a lock device. The second rail can be displaced relative to the first rail; the contact structure is arranged on the second rail; the lock device is arranged on the first rail, and the lock device includes a work piece that can move relative to the first rail and is in a position One of a blocking state and an unblocking state; wherein, when the second rail is in a retracted position relative to the first rail, the contact structure can be blocked by the working piece in the blocking state to prevent the The second rail is displaced relative to the first rail from the retracted position to an opening direction; wherein, when the work piece is in the unblocked state, the work piece fails to block the contact structure, so as to allow the second rail to be relatively The first rail is displaced from the retracted position to the opening direction.

Description of drawings

In order to further illustrate the above-mentioned objects, structural features and effects of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 shows a perspective view of a slide rail assembly installed on a rack according to an embodiment of the present invention.

FIG. 2 is a schematic three-dimensional diagram showing another perspective view of the slide rail assembly being installed on the rack according to the embodiment of the present invention.

FIG. 3 shows an exploded schematic view of the slide rail assembly according to the embodiment of the present invention.

FIG. 4 shows an exploded schematic view of a locking device of the slide rail assembly according to the embodiment of the present invention.

FIG. 5 shows a schematic view of the combination of the lock device of the slide rail assembly according to the embodiment of the present invention.

FIG. 6 shows a schematic diagram of the slide rail assembly in a collapsed state according to the embodiment of the present invention.

FIG. 7 is an enlarged schematic view of the area A of FIG. 6 , which is used to show that the second rail is blocked in a retracted position by a working piece of the locking device, and an operating piece is in a first position.

FIG. 8 is a schematic diagram showing that the blocking of the second rail by the working piece can be released by the operating piece being displaced to a second position.

FIG. 9 is a schematic diagram showing that the second rail can be displaced in an opening direction.

FIG. 10 shows a schematic diagram of the second rail continuing to move in the opening direction.

FIG. 11 is a schematic diagram showing the further displacement of the second rail in the opening direction.

FIG. 12 is a schematic diagram showing the displacement of the second rail in a retracting direction.

FIG. 13 shows a schematic diagram of the second rail continuing to move in the retracting direction.

Detailed ways

As shown in FIGS. 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 that can be displaced relative to the first rail 22 . The first rail 22 can be mounted to a front column 30a and a rear column 30b of a rack through a front bracket 26 and a rear bracket device 28 (hereinafter referred to as the bracket device 28). The principle of mounting the front bracket 26 and the bracket device 28 to the rack is substantially the same. For example, the bracket device 28 includes a longitudinal wall 32 and at least one mounting member 34 adjacent to the longitudinal wall 32 . Preferably, the bracket device 28 further includes an end wall 36 bent substantially vertically relative to the longitudinal wall 32, the at least one mounting piece 34 is disposed on the end wall 36, and the at least one mounting piece 34 is used for mounting to the end wall 36. At least one hole of the rear pillar 30b.

As shown in FIGS. 2 and 3 , the first rail 22 has a front portion f1 and a rear portion r1 . The front bracket 26 and the bracket device 28 are respectively attached to the front part f1 and the rear part r1 of the first rail 22 and can be regarded as a whole with the first rail 22 . Further, the bracket device 28 is connected (eg fixed) to the first rail 22 and is adjacent to the rear portion r1 of the first rail 22 . Preferably, the slide rail assembly 20 further includes a third rail 38 movably mounted to the first rail 22 , and the second rail 24 movably mounted to the third rail 38 . The second rail 24 has a front portion f2 and a rear portion r2.

The slide rail assembly 20 also includes a contact structure 40 and a lock device 42 . The contact structure 40 is disposed adjacent to one of the rear portion r1 of the first rail 22 and the rear portion r2 of the second rail 24 . Here, the contact structure 40 is disposed adjacent to the second rail 24 . The rear portion r2 of the second rail 24 is taken as an example; on the other hand, the locking device 42 is disposed adjacent to the other one of the rear portion r1 of the first rail 22 and the rear portion r2 of the second rail 24 . Here, the bracket device 28 where the lock device 42 is disposed adjacent to the rear portion r1 of the first rail 22 is taken as an example, but the implementation is not limited.

Preferably, the second rail 24 further includes a detent structure 44 , and the detent structure 44 is disposed on the second rail 24 adjacent to the rear portion r2 of the second rail 24 (as shown in FIG. 3 ).

Preferably, both the contact structure 40 and the release structure 44 are protrusions, but the implementation is not limited.

Preferably, the contact structure 40 includes a blocking feature 46 and a guiding feature 48 located at the front and rear ends of the contact structure 40 , respectively, wherein the blocking feature 46 has a transverse direction relative to the longitudinal length of the second rail 24 . height, and the guide feature 48 includes an inclined surface or an arc surface; on the other hand, the release structure 44 includes a first guide section 50 and a second guide section 52 respectively located at the front end of the release structure 44 with backend. Wherein, the first guide section 50 and the second guide section 52 both include an inclined surface or an arc surface.

As shown in FIGS. 4 and 5 , the locking device 42 is disposed on the bracket device 28 of the first rail 22 . The lock device 42 includes a work piece 54 . Preferably, the lock device 42 further includes an operating member 56 and a base 58 .

The longitudinal wall 32 of the bracket device 28 of the first rail 22 has a first side L1 and a second side L2 located opposite to each other. The first side L1 is a side adjacent to the third rail 38 (or the second rail 24 , the second rail 24 is not shown in FIGS. 4 and 5 ). The base 58 is connected to the second side L2.

Preferably, the base 58 and the longitudinal wall 32 of the bracket device 28 have a corresponding space H (as shown in FIG. 4 , for example, an opening), and the space H communicates with the longitudinal direction of the bracket device 28 . A first side L1 and a second side L2 of the wall 32 .

Preferably, the base 58 is provided with at least one lug 60 , such as two lugs 60 , and the two lugs 60 extend from the second side L2 to the first side L1 through the space H.

Preferably, the work piece 54 is movable relative to the first rail 22. Here, taking the work piece 54 pivotally connected to at least one lug 60 of the base 58 through a shaft 62 as an example, the work piece The position of 54 is on the first side L1 and corresponds to the space H. The working member 54 has a first portion 55a and a second portion 55b, and the shaft member 62 is located between the first portion 55a and the second portion 55b.

Preferably, the lock device 42 further includes an elastic feature 64 for providing an elastic force to the work piece 54, and the work piece 54 can maintain a blocking state S1 in response to the elastic force of the elastic feature 64 (as shown in FIG. 5 ). Show).

Preferably, the elastic feature 64 has a first elastic section 65a, a second elastic section 65b and a mounting section 65c located between the first elastic section 65a and the second elastic section 65b. The mounting section 65c is mounted on the shaft member 62, the first elastic section 65a is used for contacting the first portion 55a of the working member 54, and the second elastic section 65b is used for contacting the base 58 and adjacent to the One of the two lugs 60 . Here, the elastic feature 64 is a torsion spring as an example, but the implementation is not limited.

Preferably, the operating member 56 is movable relative to the working member 54 . Further, the operating member 56 is movably mounted to the base 58 . The operating member 56 includes a driving portion 66, and the driving portion 66 extends from the second side L2 of the longitudinal wall 32 of the bracket device 28 through the space H and faces the working member 54, so that the driving portion 66 is adjacent to the Between the first part 55a and the second part 55b of the work piece 54 .

Preferably, the operating member 56 includes a base portion 68 and an operating portion 70 bent relative to the base portion 68 . The driving portion 66 is provided on the base portion 68 .

Preferably, the base 58 has a predetermined feature 72 (eg, a hole wall of a through hole 73 , as shown in FIG. 4 ), and the operating member 56 is provided with an elastic arm 74 (as shown in FIG. 4 ). Specifically, the elastic arm 74 includes a connecting portion 76 , at least one latching portion (eg, a first latching portion 78 a and a second latching portion 78 b ), and an arm portion 80 disposed between the connecting portion 76 and the Between at least one latching portion, and a first limiting feature 81 laterally extends from the arm portion 80 . The connecting portion 76 is connected to (eg, fixed to) the base portion 68 of the operating member 56 .

Preferably, the base 68 of the operating member 56 has a first corresponding feature 82 and a second corresponding feature 84 . The first latching portion 78a of the elastic arm 74 can penetrate into the first corresponding feature 82, and the second latching portion 78b and the first limiting feature 81 of the elastic arm 74 can penetrate into the second corresponding feature 84 , so that at least one latching portion 78 a , 78 b of the elastic arm 74 and the first limiting feature 81 face the base 58 . Wherein, the at least one latching portion (for example, a first latching portion 78a and a second latching portion 78b) can be used for matching with the predetermined feature 72 of the base 58, and the first limiting feature 81 is further A second stop feature 86 (eg, a bounded longitudinal guide hole or slot) is mounted to the base 58 , and the longitudinal dimension of the first stop feature 81 is smaller than that of the second stop feature 86 . Portrait size.

Preferably, both the first corresponding feature 82 and the second corresponding feature 84 are longitudinal holes. The longitudinal length of the second corresponding feature 84 is longer than that of the first corresponding feature 82 , and the longitudinal length of the second corresponding feature 84 is substantially the same as the longitudinal length of the second limiting feature 86 , but the implementation is not limited.

Preferably, one of the operating member 56 and the base 58 is provided with at least one longitudinal guide portion 89 (as shown in FIG. 4 ), and here the base 58 is provided with a plurality of longitudinal guide portions 89 For example, but the implementation is not limited. Further, the longitudinal guide portions 89 are used to support the operating member 56 , and the operating member 56 can be longitudinally displaced relative to the base 58 through the longitudinal guide portions 89 .

Preferably, the operating portion 70 of the operating member 56 can extend from the second side L2 of the longitudinal wall 32 of the bracket device 28 to the first side L1 through a through hole 87 of the longitudinal wall 32 of the bracket device 28 . (As shown in Figure 4).

Preferably, the locking device 42 further includes an elastic member 88 disposed between the base 58 and the operating member 56 (as shown in FIG. 4 ). Here, the base 58 is provided with a first connecting feature 90, the operating member 56 is provided with a second connecting feature 92, and the elastic member 88 is a spring mounted on the first connecting feature 90 and the second connecting feature Take 92 as an example, but the implementation is not limited.

As shown in FIGS. 6 and 7 , the first rail 22 can be mounted to the rear pillar 30 b via the mounting member 34 of the bracket device 28 , and can be mounted to the front pillar via another mounting member 35 of the front bracket 26 . 30a. The slide rail assembly 20 may be in a retracted state, and at this time, the second rail 24 is in a retracted position R relative to the first rail 22 .

Further, the elastic force of the work piece 54 in response to the elastic feature 64 (the first elastic segment 65a of the elastic feature 64) can be maintained in the blocking state S1. When the second rail 24 is in the retracted position R relative to the first rail 22 , the blocking feature 46 of the contact structure 40 can be blocked by the first portion 55 a of the work piece 54 in the blocking state S1 to prevent the The second rail 24 is longitudinally displaced relative to the first rail 22 from the retracted position R to an opening direction D1. On the other hand, the operating member 56 is in a first position P1 relative to the base 58 . When the operating member 56 is in the first position P1, at least one latching portion (eg, the first latching portion 78a) of the elastic arm 74 of the operating member 56 abuts against the side wall of the base 58, so that the elastic arm 74 accumulates a predetermined elastic force, and the at least one latching portion (eg, the first latching portion 78a ) and the predetermined feature 72 of the base 58 have a predetermined longitudinal distance from each other. Preferably, the driving portion 66 and the second portion 55b of the work piece 54 in the blocking state S1 are located on substantially the same longitudinal level. Preferably, both the front end and the rear end of the driving portion 66 have guiding surfaces, such as inclined surfaces or arc surfaces.

As shown in FIG. 7 and FIG. 8 , when the work piece 54 is in an unblocked state S2 , the first portion 55 a of the work piece 54 fails to block the blocking feature 46 of the contact structure 40 for allowing the second rail 24 The first rail 22 is displaced from the retracted position R to the opening direction D1. For example, the user can apply a force F to the operating portion 70 of the operating member 56 to cause the operating member 56 to longitudinally move from the first position P1 (as shown in FIG. 7 ) to the opening direction D1 to a second position P2 (as shown in FIG. 8 ), and the operating member 56 contacts the second portion 55b of the working member 54 through the driving portion 66 , so as to drive the working member 54 to switch (eg pivot) from the blocking state S1 to In the unblocked state S2 (as shown in FIG. 8 ), the first portion 55 a of the work piece 54 fails to block the blocking feature 46 of the contact structure 40 .

In addition, when the operating member 56 is in the second position P2 relative to the base 58 , at least one latching portion (eg, the first latching portion 78a ) of the elastic arm 74 responds to the elastic arm 74 to release the predetermined elastic force. Detach the predetermined feature 72 of the base 58, whereby the operating member 56 can be held in the second position P2. At this time, the elastic member 88 accumulates a return elastic force K in a retracting direction opposite to the opening direction D1. On the other hand, the driving portion 66 of the operating member 56 in the second position P2 can support the second portion 55b of the working member 54 (as shown in FIG. 8 ), so that the working member 54 can remain in the unblocked state S2, at this time, the elastic feature 64 accumulates an elastic force.

As shown in FIG. 8 , FIG. 9 and FIG. 10 , when the second rail 24 is displaced relative to the first rail 22 from the retracted position R to the opening direction D1 , the second rail 24 passes through the unlocking structure The mutual contact between the first guide section 50 of the elastic arm 74 and the first limiting feature 81 of the elastic arm 74 is used to drive the arm portion 80 of the elastic arm 74 so that at least one latching portion of the elastic arm 74 (for example, The first detent 78a) is released from the predetermined feature 72 of the base 58.

As shown in FIG. 10 and FIG. 11 , when at least one latching portion (eg, the first latching portion 78a ) of the elastic arm 74 is released from the predetermined feature 72 of the base 58 , the operating member 56 responds to the elastic member The elastic force (such as the return elastic force K) can return to the first position P1 from the second position P2, and the driving part 66 of the operating member 56 no longer supports the second part 55b of the working member, so that the working member 54 Responding to the elastic feature 64 releasing the elastic force can remain in the blocking state S1 again. It is worth mentioning that the second rail 24 can continue to be displaced in the opening direction D1 relative to the first rail 22 to an extended position, so that the slide rail assembly is in an extended state.

As shown in FIGS. 12 and 13 , when the second rail 24 is displaced relative to the first rail 22 from the extending position to the retracting direction D2 to the retracting position R, the second rail 24 passes through the guide The guide feature 48 can pass over the work piece 54 and return to the retracted position R described above.

Specifically, when the second rail 24 is displaced in the retracting direction D2, the guiding feature 48 of the contact structure 40 will contact the work piece 54 in the blocking state S1 (as shown in FIG. 12 ) to A force is generated, so that the work piece 54 is pivoted in response to the force and is no longer in the blocking state S1 (as shown in FIG. 13 ), and the elastic feature 64 slightly accumulates an elastic force until the second rail 24 is opposite to the When the first rail 22 is in the above-mentioned retracted position R (as shown in FIG. 7 ), the work piece 54 responds to the elastic feature 64 to release the elastic force and is in the blocking state S1 , so that the first portion 55a of the work piece 54 can block The blocking feature 46 of the contact structure 40 is used to prevent the second rail 24 from being longitudinally displaced relative to the first rail 22 from the retracted position R to the opening direction D1 again.

According to the above description, it can be seen that the enhancement effect and advantage of the present invention are:

a. The locking device 42 and the contact structure 40 are disposed at the rear of the two sliding rails adjacent to the sliding rail assembly 20, so compared with the known technology, it can prevent anyone from standing on the sliding rails The front of the assembly 20 can freely release the locking mechanism of the contact structure 40 of the second rail 24 by the locking device 42 . In other words, with the slide rail assembly 20 disclosed in the embodiment of the present invention, the user must go to the rear of the slide rail assembly 20 to release the locking device 42 from the contact structure 40 of the second rail 24 . mechanism.

b. The operating member 56 can be held in the second position P2 by the elastic arm 74 being caught on the predetermined feature 72 of the base 58 , so that the working member 54 can be supported by the operating member 56 and kept in the unblocked position State S2. Once the elastic arm 74 is released, the operating member 56 can return to the first position P1 from the second position P2 to the elastic force of the elastic member 88 , and the working member 54 returns to the blocking state from the unblocked state S2 State S1.

c. When the second rail 24 returns to the retracted position R in the retracting direction D2 relative to the first rail 22 each time, the work piece 54 can be in the blocking state S1 for locking the second rail 24 R in this folded position.

Although the present invention has been described with reference to the present specific embodiments, those of ordinary skill in the art will recognize that the above embodiments are only used to illustrate the present invention, and can be made without departing from the spirit of the present invention Various equivalent changes and modifications, therefore, as long as the changes and modifications to the above-mentioned embodiments within the essential spirit of the present invention, will fall within the scope of the claims of the present application.

Claims (12)

1. A slide rail assembly comprising a first rail, a second rail, a contact structure and a locking device, wherein the first rail has a front part and a rear part; the second rail can be opposite to the The first rail is displaced, and the second rail has a front part and a rear part, and is characterized by: The contact structure is disposed adjacent to the rear of the second rail; and The locking device is disposed adjacent to the rear of the first rail, and the locking device includes: A work piece can be in one of a blocked state and an unblocked state; a base having a predetermined characteristic; and An operating member is movable relative to the working member, the operating member is movably mounted to the base, and the operating member includes a driving part and an elastic arm; Wherein, when the second rail is in a retracted position relative to the first rail, the contact structure can be blocked by the working piece in the blocking state, so as to prevent the second rail from being retracted relative to the first rail The position is displaced in an opening direction; Wherein, when the work piece is in the unblocked state, the work piece fails to block the contact structure, so as to allow the second rail to move relative to the first rail from the retracted position to the opening direction; Wherein, when the operating member is displaced from a first position to a second position, the operating member can drive the working member to switch from the blocking state to the unblocking state through the driving portion, and the driving portion is used to support the The working piece is kept in the unblocked state, and the operating piece can be locked to the predetermined feature by at least one latching portion of the elastic arm, so as to keep the operating piece in the second position. 2 . The slide rail assembly of claim 1 , wherein the locking device further comprises an elastic feature for providing an elastic force to the working piece. 3 . 3 . The slide rail assembly according to claim 2 , wherein the locking device further comprises an elastic member disposed between the base and the operating member, and the second rail further comprises an unlocking structure. 4 . ; When the second rail is displaced from the retracted position to the opening direction relative to the first rail, the second rail can drive the elastic arm through the unlocking structure, so that at least one latching portion of the elastic arm is Released from the predetermined feature of the base, the operating member can return to the first position from the second position with an elastic force of the elastic member, and the driving part of the operating member no longer supports the working member, so that the The elastic force of the work piece in response to the elastic feature can remain in the blocking state. 4 . The slide rail assembly of claim 3 , wherein the contact structure comprises a guiding feature; when the second rail is displaced relative to the first rail from an extended position to a retracted direction to the During the collapsed position, the second rail can pass over the work piece through the guide feature and return to the collapsed position. 5 . The slide rail assembly of claim 1 , wherein the base is provided with at least one lug, and the working piece is pivotally connected to the at least one lug through a shaft. 6 . 6 . The slide rail assembly of claim 3 , wherein the locking device is disposed on a bracket device adjacent to the rear of the first rail, and the bracket device comprises a longitudinal wall and at least A mounting member is adjacent to the longitudinal wall; the base is connected to the longitudinal wall, and one of the operating member and the base is provided with at least one longitudinal guiding portion, and the operating member passes through the at least one longitudinal guiding portion It is longitudinally displaceable relative to the base from the first position to the second position. 7. A slide rail assembly comprising a first rail, a second rail, a contact structure and a locking device, wherein the second rail can be displaced relative to the first rail, characterized in that: The contact structure is disposed adjacent to the rear of the second rail; and The locking device is disposed adjacent to the rear of the first rail, and the locking device includes: A work piece is movable relative to the first rail and is in one of a blocking state and an unblocking state; a base having a predetermined characteristic; and An operating member is movable relative to the working member, the operating member is movably mounted to the base, and the operating member includes a driving part and an elastic arm; Wherein, when the second rail is in a retracted position relative to the first rail, the contact structure can be blocked by the working piece in the blocking state, so as to prevent the second rail from being retracted relative to the first rail The position is displaced in an opening direction; Wherein, when the work piece is in the unblocked state, the work piece fails to block the contact structure, so as to allow the second rail to move relative to the first rail from the retracted position to the opening direction; Wherein, when the operating member is displaced from a first position to a second position, the operating member can drive the working member to switch from the blocking state to the unblocking state through the driving portion, and the driving portion is used to support the The working piece is kept in the unblocked state, and the operating piece can be locked to the predetermined feature by at least one latching portion of the elastic arm, so as to keep the operating piece in the second position. 8 . The slide rail assembly of claim 7 , wherein the locking device further comprises an elastic feature for providing an elastic force to the working piece. 9 . 9 . The slide rail assembly according to claim 8 , wherein the locking device further comprises an elastic member disposed between the base and the operating member, and the second rail further comprises an unlocking structure. 10 . ; When the second rail is displaced from the retracted position to the opening direction relative to the first rail, the second rail can drive the elastic arm through the unlocking structure, so that at least one latching portion of the elastic arm is Released from the predetermined feature of the base, the operating member can return to the first position from the second position with an elastic force of the elastic member, and the driving part of the operating member no longer supports the working member, so that the The elastic force of the work piece in response to the elastic feature can remain in the blocking state. 10 . The slide rail assembly of claim 9 , wherein the contact structure comprises a guiding feature; when the second rail is displaced relative to the first rail from an extended position to a retracted direction to the During the collapsed position, the second rail can pass over the work piece through the guide feature and return to the collapsed position. 11 . The slide rail assembly of claim 7 , wherein the base is provided with at least one lug, and the working piece is pivotally connected to the at least one lug through a shaft. 12 . 12. The slide rail assembly of claim 7, wherein the locking device is disposed on a bracket device adjacent to the rear of the first rail, and the bracket device comprises a longitudinal wall and at least A mounting member is adjacent to the longitudinal wall; the base is connected to the longitudinal wall, and one of the operating member and the base is provided with at least one longitudinal guiding portion, and the operating member passes through the at least one longitudinal guiding portion It is longitudinally displaceable relative to the base from the first position to the second position.

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