A middle rail synchronous structure of a slide rail

Abstract

This utility model discloses a middle rail synchronization structure for a slide rail, belonging to the field of slide rail technology. The slide rail includes an outer rail, an inner rail, and a middle rail. The middle rail synchronization structure further includes: a synchronization baffle, movably mounted on the middle rail and located between the middle rail and the inner rail, the synchronization baffle moving between a first position and a second position relative to the middle rail; a release member, slidably connected to the middle rail, the release member having a limiting part; when the inner rail is at the first retraction point, the synchronization baffle is in the first position, and a stop block provided at the rear end of the inner rail abuts against the synchronization baffle; when the middle rail is at the second extension point, the limiting part contacts a limiting wall formed on the inner side of the outer rail; as the middle rail continues to extend from the second extension point, the limiting wall pushes the limiting part to cause the release member to slide relative to the middle rail, and then the release member pushes the synchronization baffle from the first position to the second position, the stop block disengaging from contact with the synchronization baffle.

Description

Technical Field

[0001] This utility model relates to the field of slide rail technology, and in particular to a middle rail synchronization structure for a slide rail. Background Technology

[0002] With the rapid development of information technology, servers play a crucial role in data storage, processing, and transmission. To meet the ever-increasing demands for data processing, server performance and functionality are constantly improving, while server density is also increasing. In server racks, servers are typically mounted on the chassis via rails for easy maintenance and replacement.

[0003] Currently, three-section slide rails are widely used in server racks, enabling the extension and retraction of the inner, middle, and outer rails. However, traditional synchronous slide rails typically rely on mechanical linkages, inclined sliders, or pivots to control the coordinated extension of the middle and inner rails. These designs have several drawbacks, such as large structural space requirements, which occupy significant internal rack space and hinder the layout of high-density servers; and unstable movement, which may cause jamming or asynchrony between the inner and middle rails during extension, affecting the server removal operation.

[0004] Especially in mid-to-high-end server applications, the accuracy requirements for synchronized actions are even higher. Furthermore, in actual maintenance, it is sometimes necessary for the inner rail to extend a certain length and then extend independently relative to the middle rail to facilitate more precise operations on the server. Traditional sliding rail structures are ill-suited to meet these requirements.

[0005] Therefore, there is a need for a new type of slide rail structure that can achieve synchronous movement of the inner rail and the middle rail and automatically unlock the synchronous movement between the inner and middle rails at a certain point. Utility Model Content

[0006] This utility model provides a middle rail synchronization structure for a slide rail to solve the problems in the prior art.

[0007] This utility model embodiment adopts the following technical solution: a middle rail synchronization structure for a slide rail, the slide rail including an outer rail, an inner rail, and a middle rail located between the outer rail and the inner rail, the middle rail being slidably connected to the outer rail, the inner rail being slidably connected to the middle rail, the inner rail having a first retraction point and a first extension point relative to the middle rail, and the middle rail having a second retraction point and a second extension point relative to the outer rail; the middle rail synchronization structure further includes: a synchronization baffle, movably mounted on the middle rail and located between the middle rail and the inner rail, the synchronization baffle moving between a first position and a second position relative to the middle rail; a release member, slidably connected to the middle rail, the release member... The release member is provided with a limiting part, and the synchronous baffle is at least partially in contact with the release member; when the inner rail is at the first retraction point, the synchronous baffle is in the first position, and the stop block provided at the rear end of the inner rail abuts against the synchronous baffle to achieve relative fixation of the inner rail and the middle rail; when the middle rail is at the second extension point, the limiting part contacts the limiting wall formed on the inner side of the outer rail; as the middle rail continues to extend from the second extension point, the limiting wall pushes the limiting part to make the release member slide relative to the middle rail, and then the release member pushes the synchronous baffle to move from the first position to the second position, and the stop block disengages from the synchronous baffle to achieve relative sliding of the inner rail and the middle rail.

[0008] Preferably, one end of the synchronizing baffle is rotatably connected to the middle rail via a rotating shaft, and the other end of the synchronizing baffle is configured as a movable end pointing towards the rear end of the middle rail.

[0009] Preferably, a torsion spring is fitted on the rotating shaft, and the two torsion arms of the torsion spring are respectively inserted into the first hole on the middle rail and the second hole on the synchronizing baffle. The torsion spring is used to keep the synchronizing baffle inclined to the first position.

[0010] Preferably, the release member has a first guiding arc surface, and the movable end of the synchronous baffle is formed with a hook, which abuts against the first guiding arc surface; when the release member slides relative to the middle rail, the first guiding arc surface pushes the hook to move along the first guiding arc surface, so as to realize that the synchronous baffle rotates around the rotating shaft between the first position and the second position.

[0011] Preferably, the middle rail is provided with a limiting groove for limiting the travel of the hook, and the hook is at least partially located in the limiting groove.

[0012] Preferably, the movable end of the synchronizing baffle also has a protrusion with a first inclined surface; when the inner rail is at the first retraction point, the stop block abuts against the protrusion; when the inner rail continues to extend, the synchronizing baffle rotates from the first position to the second position, so that the protrusion disengages from the stop block; when the inner rail is at the first extension point, the synchronizing baffle returns to the first position; when the inner rail moves from the first extension point to the first retraction point, the stop block contacts and presses against the first inclined surface, thereby pushing the synchronizing baffle to rotate from the first position to the second position, so that the stop block passes over the protrusion and is placed at the first retraction point.

[0013] Preferably, the release member includes a sheet-like main structure and a limiting part connected to the main structure, the main structure being slidably connected to the middle rail, and the first guide arc surface being located on the main structure;

[0014] The main structure also has a positioning protrusion, and a compression spring is installed in the mounting groove provided on the middle rail. The positioning protrusion is at least partially inserted into the compression spring. When the release member slides and compresses the compression spring, it pushes the synchronous baffle from the first position to the second position through the first guide arc surface.

[0015] Preferably, the middle rail and the outer rail are slidably connected by ball joints.

[0016] Preferably, the outer end of the inner rail is further provided with a limiting baffle, and when the inner rail is at the first retraction point, the limiting baffle at least partially abuts against the outer end of the middle rail.

[0017] Preferably, the main structure is provided with at least two strip holes, and the middle rail is equipped with limiting screws corresponding to the strip holes, with the shank of each limiting screw slidingly engaging with the corresponding strip hole.

[0018] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0019] This sliding rail structure, when the inner rail is pulled out, automatically and synchronously unfolds the inner and middle rails and automatically unlocks and separates them through the cooperation of synchronous baffles, limiting walls on the outer rail, limiting parts on the release components, and stops on the inner rail. This results in smoother and more efficient operation. Maintenance personnel can more easily remove servers from the rack for maintenance or replacement, significantly saving maintenance time. As server density continues to increase, rack space becomes more compact. This streamlined sliding rail structure, with its small footprint, better adapts to the layout requirements of high-density servers. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 This is a three-dimensional structural diagram of the slide rail of this utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the rear end of the inner rail and the middle rail of this utility model;

[0023] Figure 3 This is a three-dimensional structural diagram of the slide rail of this utility model after the inner rail has been removed;

[0024] Figure 4 This is a schematic diagram of the synchronization baffle after it is separated from the middle rail in the middle rail synchronization structure of this utility model;

[0025] Figure 5 This is a three-dimensional structural diagram of the back of the middle rail and the middle rail synchronization structure of this utility model;

[0026] Figure 6 This is a three-dimensional structural cross-sectional view of the middle rail, outer rail, and middle rail synchronization structure of this utility model.

[0027] Figure 7 This is an exploded view of the middle rail and the middle rail synchronization structure of this utility model;

[0028] Figure 8 This is an exploded view of the release plate and the limiting screw of this utility model;

[0029] Figure 9 This is a schematic diagram showing the positions of the inner rail and the synchronous baffle when the inner rail of this utility model is at the first retraction point.

[0030] Figure 10 This is a schematic diagram showing the positions of the inner rail and the synchronous baffle when the inner rail of this utility model moves from the first extension point to the first retraction point.

[0031] Reference numerals: 1-Outer rail; 11-Limiting wall; 2-Inner rail; 21-Stop block; 22-Limiting baffle; 3-Middle rail; 31-First hole; 32-Limiting groove; 33-Mounting groove; 34-Compression spring; 35-Limiting screw; 4-Synchronous baffle; 41-Rotating shaft; 42-Torsion spring; 43-Second hole; 44-Hook; 45-Protrusion; 451-First inclined surface; 5-Limiting part; 6-Release component; 61-Main structure; 611-First guide arc surface; 612-Positioning protrusion; 613-Strip hole. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0034] Inside the server room, servers are mounted on racks in the chassis via sliding rails. With the increasing demands for server density and maintenance efficiency, three-section sliding rails have become widely used in server racks. In this type of sliding rail, the inner rail 2, middle rail 3, and outer rail 1 must be able to achieve stable and smooth deployment and retraction.

[0035] Traditional synchronous slide rails typically rely on mechanical linkages, inclined plane sliders, or rotating shafts 41 to achieve coordinated extension of the middle rail 3 and inner rail 2. However, such designs are limited by high precision requirements, large structural space, and unstable return, especially in mid-to-high-end server applications where the accuracy of synchronous movements is even more critical. Furthermore, when necessary, the inner rail 2 needs to extend a certain length before extending independently relative to the middle rail 3. Therefore, it is necessary to develop a new slide rail structure that is structurally simplified and can automatically synchronize and unlock.

[0036] Reference Figures 1 to 10As shown, this utility model embodiment provides a middle rail synchronization structure for a slide rail. The slide rail includes an outer rail 1, an inner rail 2, and a middle rail 3 located between the outer rail 1 and the inner rail 2. The middle rail 3 is slidably connected to the outer rail 1, and the inner rail 2 is slidably connected to the middle rail 3. The inner rail 2 has a first retraction point and a first extension point relative to the middle rail 3. The middle rail 3 has a second retraction point and a second extension point relative to the outer rail 1. (The second retraction point is a point where the middle rail retracts into the outer rail. As prior art, generally, at the second retraction point, the middle rail is completely retracted into the outer rail. Similarly, at the first retraction point, the inner rail is completely retracted into the middle rail. However, in some special cases, at the first retraction point, the inner rail may retain a portion that is not retracted into the middle rail, and at the second retraction point, the middle rail may also retain a portion that is not retracted into the middle rail.) The middle rail synchronization structure also includes a synchronization baffle 4 and a release element 6. The synchronizing baffle 4 is movably mounted on the middle rail 3 and located between the middle rail 3 and the inner rail 2. The synchronizing baffle 4 moves between a first position and a second position relative to the middle rail 3. Specifically, the synchronizing baffle 4 is generally rotatably connected to the middle rail 3: one end of the synchronizing baffle 4 is rotatably connected to the middle rail 3 via a rotating shaft 41, and the other end of the synchronizing baffle 4 is configured as a movable end pointing towards the rear end of the middle rail 3, thereby achieving the switching between the first position and the second position through the rotation of the synchronizing baffle 4. Figure 3 The position of the synchronizing baffle 4 is the first position. Figure 3 By rotating the synchronizing baffle 4 counterclockwise from the first position to the second position, the synchronizing baffle can be moved from the first position to the second position.

[0037] The release member 6 is slidably connected to the middle rail 3. The release member 6 is also provided with a limiting part 5. The synchronous baffle 4 is at least partially in contact with the release member 6. When the inner rail 2 is at the first retraction point, the synchronous baffle 4 is in the first position, and the stop block 21 provided at the rear end of the inner rail 2 abuts against the synchronous baffle 4 to achieve relative fixation of the inner rail 2 and the middle rail 3. When the middle rail 3 is at the second extension point, the limiting part 5 contacts the limiting wall 11 formed on the inner side of the outer rail. As the middle rail 3 continues to extend from the second extension point, the limiting wall 11 pushes the limiting part 5 on the release member 6 so that the release member slides relative to the middle rail 3. Then the release member 6 pushes the synchronous baffle 4 to move from the first position to the second position. At this time, the stop block 21 disengages from the synchronous baffle 4 to achieve relative sliding of the inner rail 2 and the middle rail 3.

[0038] Based on the above, the working principle of this slide rail is as follows: When the inner rail 2 is at the first retraction point, the synchronous baffle 4 is in the first position, and the stop block 21 at the rear end of the inner rail 2 abuts against the synchronous baffle 4. At this time, the inner rail 2 and the middle rail 3 are relatively fixed. Therefore, when the slide rail begins to unfold, since the inner rail 2 and the middle rail 3 are relatively fixed, they will slide together relative to the outer rail 1. The middle rail 3 moves along the outer rail 1 towards the second extension point, and the inner rail 2 also moves synchronously with the middle rail 3, achieving stable synchronization between the inner rail 2 and the middle rail 3 in the initial stage of unfolding.

[0039] When the middle rail 3 moves to the second extension point, the limiting wall 11 contacts the release member 6. As the middle rail 3 continues to extend from the second extension point, the limiting wall 11, under its obstruction, pushes the release member 6 to slide relative to the middle rail 3. During the sliding process, the release member 6 pushes the synchronous baffle 4 from the first position to the second position, causing the stop block 21 at the rear end of the inner rail 2 to disengage from the synchronous baffle 4. At this time, the relative fixed state between the inner rail 2 and the middle rail 3 is released, and the inner rail 2 can extend independently relative to the middle rail 3, realizing the function of automatic unlocking and separation after reaching the positioning point.

[0040] In summary, this slide rail structure, when the inner rail 2 is pulled out, automatically and synchronously unfolds the inner rail 2 and the middle rail 3, and automatically unlocks and separates them, through the cooperation of the synchronous baffle 4, the limiting wall 11 on the outer rail, the limiting part 5 on the release component 6, and the stop block 21 on the inner rail 2. This makes it smoother and more efficient to use. Maintenance personnel can more easily remove the server from the rack for maintenance or replacement, greatly saving maintenance time.

[0041] As server density continues to increase, the space within server racks is becoming more compact. This sliding rail structure is streamlined, occupies little space, and can better adapt to the layout requirements of high-density servers.

[0042] In some practical applications, refer to Figures 3 to 4As shown, a torsion spring 42 is fitted onto the rotating shaft 41 of the aforementioned synchronous baffle 4. The two torsion arms of the torsion spring 42 are respectively inserted into the first hole 31 on the middle rail 3 and the second hole 43 on the synchronous baffle 4. The torsion spring 42 is used to keep the synchronous baffle 4 inclined to the first position. Therefore, in the natural state of the synchronous baffle 4, under the torsional force of the torsion spring 42, the synchronous baffle 4 will abut against the release member 6. When the release member 6 slides relative to the middle rail 3 and toward the rear end of the middle rail 3, the release member 6 will push the synchronous baffle 4 to move to the second position, thereby causing the synchronous baffle 4 to disengage from the block 21 on the inner rail 2, so as to realize the relative sliding of the inner rail 2 with respect to the outer rail 1, thereby enabling the inner rail 2 to extend outward independently, or to directly pull the inner rail 2 completely out of the middle rail 3. When the inner rail 2 is no longer subjected to the outward pulling force, that is, when it is not necessary to pull out the server on the inner rail 2, the torsion spring 42 resets and drives the synchronous baffle 4 to continue to return to the initial first position.

[0043] In other practical applications, based on the above implementation method: refer to Figures 3 to 10 As shown, the movable end of the synchronous baffle 4 also has a protrusion 45, on which a first inclined surface 451 is provided; when the inner rail 2 is at the first retraction point, the stop block 21 abuts against the protrusion 45 (as shown). Figure 9 When the inner rail 2 continues to extend, the synchronous baffle 4 rotates from the first position to the second position, so that the protrusion 45 disengages from the block 21; when the inner rail 2 is at the first extension point, the synchronous baffle 4 returns to the first position; when the inner rail 2 moves from the first extension point to the first retraction point, the block 21 contacts and presses the first inclined surface 451 (e.g., Figure 10 As shown, when the stop block is about to press against the first inclined surface, the synchronous baffle 4 is pushed to rotate from the first position to the second position, so that the stop block 21 passes over the protrusion 45 and is placed at the first retraction point. The main function is to enable the inner rail 2 to return to the initial first retraction point with only one pushing action when it is pushed back, and to lock relative to the middle rail 3 again, so as to achieve synchronous action when it is pulled out next time.

[0044] In this embodiment, the inner rail 2 extends as follows: When the inner rail 2 is at the first retraction point, the stop 21 at the rear end of the inner rail 2 abuts against the protrusion 45 at the movable end of the synchronous baffle 4. At this time, the inner rail 2 and the middle rail 3 are relatively fixed and extend synchronously. As the inner rail 2 continues to extend, the synchronous baffle 4 rotates from the first position to the second position, and the protrusion 45 disengages from the stop 21. The inner rail 2 can continue to extend independently relative to the middle rail 3 until it reaches the first extension point, or it can continue to extend outward from the first extension point to achieve separation from the middle rail 3. In this process, the rotation of the synchronous baffle 4 is achieved by the mechanism described above, where the limiting wall 11 pushes the limiting part 5 on the release member 6, and the release member 6 then pushes the synchronous baffle 4.

[0045] Inner rail 2 push-back process: When the inner rail 2 is at the first extension point, the synchronous baffle 4 will return to the first position under the action of the torsion spring 42. When the inner rail 2 is pushed from the first extension point to the first retraction point, the stop block 21 contacts and presses the first inclined surface 451 on the protrusion 45. Due to the presence of the first inclined surface 451, the stop block 21 will generate a component force that causes the synchronous baffle 4 to rotate during the pressing process, thereby pushing the synchronous baffle 4 to rotate from the first position to the second position again. At this time, the stop block 21 can pass over the protrusion 45 and finally be placed at the first retraction point. When the stop block 21 reaches the first retraction point, the synchronous baffle 4 will return to the first position. At this time, the stop block 21 will again press against the protrusion 45, and the inner rail 2 and the middle rail 3 will be locked relative to each other again (this relative locking means that when the inner rail is pulled out again, the inner rail and the middle rail can move outward synchronously together), preparing for the synchronous action when it is pulled out again.

[0046] Therefore, in this embodiment, during actual operations such as server maintenance, maintenance personnel only need a single pull action to make the inner rail 2 and the middle rail 3 move synchronously first, then extend the inner rail 2 separately from the middle rail 3, and finally, the inner rail 2 can be directly pulled away from the middle rail 3. When the inner rail 2 extends, maintenance personnel only need a single push action to return the inner rail 2 to its initial position and lock it with the middle rail 3, without the need for additional complex operations to achieve relative fixation of the inner rail 2 and the middle rail 3. This greatly simplifies the operation process, especially in scenarios where frequent server operations are required, where the advantages are obvious.

[0047] Furthermore, because inner rail 2 can accurately return to the first retraction point and lock relative to middle rail 3 when pushed back, it ensures that inner rail 2 and middle rail 3 are stably synchronized each time they are pulled out. This stable synchronization helps reduce problems such as jamming and collisions that may occur during the server's removal from the chassis due to asynchrony between inner rail 2 and middle rail 3, reducing the risk of damage to server hardware and thus improving the reliability and stability of the entire server system.

[0048] In some practical applications, refer to Figure 4and Figure 8 As shown, the release member 6 has a first guide arc surface 611, and the movable end of the synchronous baffle 4 is formed with a hook 44, which abuts against the first guide arc surface 611. When the release member 6 slides relative to the middle rail 3, the first guide arc surface 611 pushes the hook 44 to move along the first guide arc surface 611, so as to realize that the synchronous baffle 4 rotates around the rotating shaft 41 between the first position and the second position.

[0049] When the slide rail has not reached the unlock position, the synchronous baffle 4 is in the first position, and the hook 44 formed by its movable end abuts against the first guide arc surface 611 of the release member 6. At this time, the stop block 21 at the rear end of the inner rail 2 cooperates with the synchronous baffle 4, so that the inner rail 2 and the middle rail 3 are relatively fixed and can move synchronously. When the middle rail 3 moves to the second extension point and continues to extend, the limiting wall 11 pushes the release member 6 to slide relative to the middle rail 3. As the release member 6 slides, the first guide arc surface 611 also moves. Since the hook 44 abuts against the first guide arc surface 611, the first guide arc surface 611 will push the hook 44 to move along its arc surface. Because the synchronous baffle 4 is installed around the rotating shaft 41, the movement of the hook 44 will drive the synchronous baffle 4 to rotate around the rotating shaft 41, so that the synchronous baffle 4 rotates from the first position to the second position. During this process, the stop block 21 at the rear end of the inner rail 2 disengages from the synchronous baffle 4, realizing the relative sliding of the inner rail 2 and the middle rail 3, that is, completing the unlocking.

[0050] The design of the first guide arc surface 611 allows the hook 44 to move along a smooth curve during movement, avoiding sudden jamming or impact. This helps ensure that the rotation of the synchronous baffle 4 between the first and second positions is smoother, thus making the synchronization and unlocking actions of the inner rail 2 and the middle rail 3 smoother and reducing potential damage to the slide rail and server caused by unstable actions.

[0051] The rotation of the synchronous baffle 4 is achieved by the engagement of the hook 44 with the first guide arc surface 611. This design realizes complex linkage functions within a limited space, making the overall structure of the slide rail more compact. Compared with some traditional designs that rely on complex mechanical linkages or large sliders, this structure occupies less space and is more suitable for use in space-constrained environments such as server racks.

[0052] Furthermore, the middle rail 3 is provided with a limiting groove 32 for limiting the travel of the hook 44. The hook 44 is at least partially located in the limiting groove 32. The setting of the limiting groove 32 limits the rotation range of the middle rail 3, so that the synchronous baffle 4 always rotates between the first position and the second position, avoiding the synchronous baffle 4 from exceeding the limit due to the torsional elasticity of the torsion spring 42 or other external forces.

[0053] In some practical applications, the release element 6 and the middle rail 3 slide elastically, as detailed below: (Refer to...) Figure 4 , Figure 7 and Figure 8 As shown, the release component 6 includes a sheet-like main body structure 61 and a limiting part 5 connecting the main body structure. The main body structure 61 can be located in the gap between the synchronous baffle 4 and the middle rail 3 and slidably connected to the middle rail 3. In this case, the limiting part needs to pass through the middle rail and be placed in the gap between the middle rail and the outer rail. The main body structure 61 can also be located outside the middle rail and slidably connected to the middle rail. In this case, the main body structure is located between the middle rail and the outer rail, and the limiting part 5 can directly contact the limiting wall.

[0054] The first guide arc surface 611 is located on the main structure 61; the main structure 61 also has a positioning protrusion 612, and a compression spring 34 is installed in the mounting groove 33 provided on the middle rail 3. The positioning protrusion 612 is at least partially inserted into the compression spring 34; when the release member 6 slides and compresses the compression spring 34, it pushes the synchronous baffle 4 from the first position to the second position through the first guide arc surface 611.

[0055] In this embodiment, when the slide rail has not reached the unlock position, the release member 6 is in the initial position, the main structure 61 is slidably connected to the middle rail 3, and the positioning protrusion 612 is at least partially inserted into the compression spring 34 in the mounting groove 33 of the middle rail 3. At this time, the compression spring 34 is in its natural state or has only a small pre-compression. The synchronous baffle 4 is in the first position, and the stop block 21 at the rear end of the inner rail 2 cooperates with the synchronous baffle 4 to fix the inner rail 2 and the middle rail 3 relatively.

[0056] When the middle rail 3 moves to the second extension point and continues to extend, the limiting wall 11 contacts the limiting part 5 and pushes the release member 6 to slide relative to the middle rail 3. During the sliding process of the release member 6, the positioning protrusion 612 on the main structure 61 will further compress the compression spring 34 in the mounting groove 33. As the release member 6 slides, the first guide arc surface 611 pushes the hook 44 of the synchronous baffle 4 to move along the arc surface. Since the synchronous baffle 4 is installed around the rotating shaft 41, the movement of the hook 44 causes the synchronous baffle 4 to rotate around the rotating shaft 41 from the first position to the second position. The stop block 21 at the rear end of the inner rail 2 disengages from the synchronous baffle 4, realizing the relative sliding of the inner rail 2 and the middle rail 3, completing the unlocking. Subsequently, when the inner rail 2 is no longer subjected to the outward extension force, the compression spring 34 will drive the release member 6 to reset.

[0057] When the inner rail 2 moves from the first extension point to the first retraction point, the stop block 21 presses against the first inclined surface 451 of the protrusion 45 of the synchronous baffle 4, causing the stop block 21 to pass over the protrusion 45. At this time, the torsion spring 42 will drive the synchronous baffle 4 to rotate back to the first position. Therefore, the compression spring 34 is mainly used to reset the release member 6, while the torsion spring 42 is mainly used to reset the synchronous baffle 4.

[0058] In this embodiment, the elastic sliding design allows the release element 6 to act as a buffer during sliding through the compression spring 34. During the unlocking process by the limiting wall 11 pushing the release element 6, the compression spring 34 absorbs some of the impact force, preventing rigid collisions between the release element 6 and the middle rail 3 and the synchronous baffle 4, thus reducing the risk of wear and damage to the components.

[0059] Furthermore, the structure of the positioning protrusion 612 cooperating with the compression spring 34 is integrated between the release part 6 and the middle rail 3. While realizing the elastic sliding function, it does not increase the additional space occupation and maintains the compactness of the overall slide rail structure.

[0060] Generally, the main structure 61 is provided with at least two strip holes 613, and the middle rail is equipped with limiting screws 35 corresponding to the strip holes. The shank of each limiting screw is slidably engaged with the corresponding strip hole.

[0061] In some practical applications, the middle rail 3 and the outer rail 1 are slidably connected by a ball joint. The ball joint, as a prior art technology, is a component used for relative sliding between the middle rail 3 and the outer rail 1, and it has several balls acting as sliding elements.

[0062] In some practical applications, based on any of the above embodiments, the outer end of the inner rail 2 is also provided with a limit stop 22 (e.g., Figure 1 When the inner rail 2 is at the first retraction point, the limiting baffle 22 at least partially abuts against the outer end of the middle rail 3. Therefore, when the inner rail 2 pushes back inward, the limiting baffle 22 can drive the middle rail 3 to move together, so as to achieve synchronous retraction of the middle rail 3 and the inner rail 2.

[0063] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A middle rail synchronization structure for a slide rail, characterized in that, The slide rail includes an outer rail (1), an inner rail (2), and a middle rail (3) located between the outer rail (1) and the inner rail (2). The middle rail (3) is slidably connected to the outer rail (1), and the inner rail (2) is slidably connected to the middle rail (3). The inner rail (2) has a first retraction point and a first extension point relative to the middle rail (3), and the middle rail (3) has a second retraction point and a second extension point relative to the outer rail (1). The intermediate-track synchronization structure also includes: Synchronous baffle (4) is movably installed on the middle rail (3) and located between the middle rail (3) and the inner rail (2). The synchronous baffle (4) moves between a first position and a second position relative to the middle rail (3). Release member (6) is slidably connected to the middle rail (3), and a limit part (5) is provided on the release member (6). The synchronous baffle (4) is at least partially in contact with the release member (6). When the inner rail (2) is at the first retraction point, the synchronous baffle (4) is in the first position, and the stop block (21) at the rear end of the inner rail (2) abuts against the synchronous baffle (4) to achieve relative fixation of the inner rail (2) and the middle rail (3); when the middle rail (3) is at the second extension point, the limiting part (5) contacts the limiting wall (11) formed on the inner side of the outer rail (1); as the middle rail (3) continues to extend from the second extension point, the limiting wall (11) pushes the limiting part (5) so that the release member (6) slides relative to the middle rail (3), and then the release member (6) pushes the synchronous baffle (4) to move from the first position to the second position, and the stop block (21) disengages from the synchronous baffle (4) to achieve relative sliding of the inner rail (2) and the middle rail (3).

2. The middle rail synchronization structure of a slide rail according to claim 1, characterized in that, One end of the synchronizing baffle (4) is rotatably connected to the middle rail (3) via a rotating shaft (41), and the other end of the synchronizing baffle (4) is configured as a movable end and points to the rear end of the middle rail (3).

3. The middle rail synchronization structure of a slide rail according to claim 2, characterized in that, A torsion spring (42) is fitted on the rotating shaft (41). The two torsion arms of the torsion spring (42) are respectively inserted into the first hole (31) on the middle rail (3) and the second hole (43) on the synchronous baffle (4). The torsion spring (42) is used to keep the synchronous baffle (4) inclined to the first position.

4. The middle rail synchronization structure of a slide rail according to claim 2, characterized in that, The release member (6) has a first guide arc surface (611), and the movable end of the synchronous baffle (4) is formed with a hook (44), which abuts against the first guide arc surface (611). When the release member (6) slides relative to the middle rail (3), the first guide arc surface (611) pushes the hook (44) to move along the first guide arc surface (611) so as to realize that the synchronous baffle (4) rotates around the rotating shaft (41) between the first position and the second position.

5. The middle rail synchronization structure of a slide rail according to claim 4, characterized in that, The middle rail (3) is provided with a limiting groove (32) for limiting the travel of the hook (44), which is at least partially located in the limiting groove (32).

6. The middle rail synchronization structure of a slide rail according to claim 3, characterized in that, The movable end of the synchronous baffle (4) also has a protrusion (45), on which a first inclined surface (451) is provided; when the inner rail (2) is at the first retraction point, the stop block (21) abuts against the protrusion (45); when the inner rail (2) continues to extend, the synchronous baffle (4) rotates from the first position to the second position, so that the protrusion (45) is released from the obstruction of the stop block (21); when the inner rail (2) is at the first extension point, the synchronous baffle (4) returns to the first position; when the inner rail (2) moves from the first extension point to the first retraction point, the stop block (21) contacts and presses the first inclined surface (451), thereby pushing the synchronous baffle (4) to rotate from the first position to the second position, so that the stop block (21) passes over the protrusion (45) and is placed at the first retraction point.

7. The middle rail synchronization structure of a slide rail according to claim 4, characterized in that, The release component (6) includes a sheet-like main body structure (61) and a limiting part (5) connected to the main body structure (61). The main body structure (61) is slidably connected to the middle rail (3), and the first guide arc surface (611) is located on the main body structure (61). The main structure (61) also has a positioning protrusion (612), and a compression spring (34) is installed in the mounting groove (33) provided on the middle rail (3). The positioning protrusion (612) is at least partially inserted into the compression spring (34). When the release member (6) slides and compresses the compression spring (34), it pushes the synchronous baffle (4) from the first position to the second position through the first guide arc surface (611).

8. The middle rail synchronization structure of a slide rail according to claim 1, characterized in that, The middle rail (3) and the outer rail (1) are connected by a ball joint.

9. The middle rail synchronization structure of a slide rail according to claim 1, characterized in that, The outer end of the inner rail (2) is also provided with a limiting baffle (22). When the inner rail (2) is at the first retraction point, the limiting baffle (22) at least partially abuts against the outer end of the middle rail (3).

10. The middle rail synchronization structure of a slide rail according to claim 7, characterized in that, The main structure (61) is provided with at least two strip holes (613), and the middle rail (3) is equipped with a limiting screw (35) corresponding to the strip hole (613). The rod of each limiting screw (35) is slidably engaged with the corresponding strip hole (613).

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