Elastic sheet type bidirectional interlocking sliding rail

Abstract

The utility model discloses an elastic piece type bidirectional interlocking sliding rail, and relates to the technical field of sliding rails. In the sliding rail body, an outer rail, a middle rail and an inner rail all extend in the first direction and are sequentially connected in a sliding mode, and through holes are formed in the two opposite sides of the middle rail in the first direction. The two self-locking mechanisms are symmetrically arranged in the first direction, in each self-locking mechanism, a locking block is arranged on the contact face of the outer rail, a clamping block is arranged on the inner rail, the elastic piece comprises an installation part, a V-shaped positioning part and a limiting part which are sequentially connected in the first direction, the installation part is arranged on the middle rail, and the limiting part is arranged on the middle rail. The corner of the positioning part can slide on the contact surface in the first direction and cross the locking block, and the positioning part or the limiting part is arranged in the through hole in a penetrating mode; when the sliding rail main body is retracted, each locking block is clamped and locked with the corresponding corner, and each limiting part is clamped and locked with the corresponding clamping block; and when the corner leaves the contact surface, the positioning part can drive the limiting part to be far away from the clamping block so as to relieve the clamping and locking effect. According to the utility model, bidirectional positioning locking can be realized in a retracted state, and the sliding synchronism is improved.

Description

Technical Field

[0001] This utility model relates to the field of slide rail technology, and in particular to a spring-loaded bidirectional interlocking slide rail. Background Technology

[0002] Drawer slides are a type of hardware fitting installed on various cabinets to allow drawers or cabinet panels to move in and out. Drawer slides can be classified into roller type, ball bearing type, and gear type. With the rapid development of technology and the increasing demands of users, existing drawer slides have evolved from a two-section unidirectional sliding structure to a three-section bidirectional sliding structure.

[0003] Currently, most two-section slide rails are equipped with a self-locking device to lock the two sections in the retracted state, preventing them from easily sliding out. However, for three-section bidirectional slide rails, the existing one-way self-locking device is not applicable, and the technology for bidirectional self-locking devices is currently lacking. Therefore, existing three-section bidirectional slide rails do not have a positioning and locking function. Moreover, the existing three-section bidirectional slide rails have poor synchronization during use, which negatively impacts user satisfaction. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a spring-loaded bidirectional interlocking slide rail, which can achieve bidirectional positioning and locking in the retracted state and improve sliding synchronization.

[0005] This utility model embodiment provides a spring-loaded bidirectional interlocking slide rail, which includes:

[0006] The slide rail body has an unfolded state and a retracted state. The slide rail body includes an outer rail, a middle rail and an inner rail, all extending along a first direction. The outer rail is provided with a contact surface. The middle rail is slidably connected to the outer rail and the inner rail along the first direction. The middle rail is provided with through holes on opposite sides along the first direction.

[0007] The self-locking mechanism has two parts, which are symmetrically arranged along a first direction. The self-locking mechanism includes a locking block, a spring piece, and a locking block. The locking block is located on the contact surface, and the locking block is located on the inner rail. The spring piece includes a mounting part, a positioning part, and a limiting part connected in sequence along the first direction. The mounting part is located on the middle rail, and the positioning part is V-shaped. The corner of the positioning part is configured to slide along the first direction on the contact surface and pass over the locking block. The positioning part or the limiting part passes through the through hole.

[0008] When the slide rail body is in the retracted state, the two locking blocks are respectively engaged with the corners of the two positioning parts, and the two limiting parts are respectively engaged with the two locking blocks; when the corner of the positioning part leaves the contact surface, the positioning part is configured to drive the limiting part away from the locking block to release the engaging and locking function.

[0009] According to the embodiments of the present invention, the spring-loaded bidirectional interlocking slide rail has at least the following beneficial effects: self-locking mechanisms are provided on opposite sides of the slide rail body along the first direction, and the two self-locking mechanisms are symmetrically arranged, so that the slide rail body not only has the function of bidirectional sliding, but also has the function of bidirectional self-locking, making it difficult for the slide rail body to slide out and unfold when it is in the retracted state; when the slide rail body is in the retracted state, the two locking blocks on the outer rail will respectively apply a locking and blocking effect to the positioning part of the corresponding spring piece on the middle rail, so that the middle rail is stationary relative to the outer rail in the first direction. At the same time, the limiting part of the two spring pieces on the middle rail will respectively apply a locking and blocking effect to the corresponding locking block on the inner rail, so that the inner rail is stationary relative to the middle rail in the first direction, thereby realizing that the slide rail body is in the retracted self-locking state.

[0010] When an external force is applied to the inner rail to drive it to move along one side of the first direction, the inner rail will move along with the middle rail due to the locking action between the locking block and the limiting part of the spring piece. During this process, the positioning part of the corresponding spring piece slides along the contact surface and passes over the locking block, allowing the positioning part of the spring piece to leave the contact surface. At the same time, the positioning part can drive the limiting part away from the locking block to release the locking action between the limiting part and the locking block, thereby allowing the inner rail to slide relative to the middle rail and enabling the slide rail body to extend into place. Moreover, the positioning part of the other spring piece remains in contact with the contact surface, allowing the limiting part of the spring piece to lock onto the other locking block, thereby preventing the inner rail from moving in the opposite direction relative to the middle rail during the unfolding of the slide rail body. This results in the inner rail and the middle rail being located on opposite sides of the outer rail along the first direction, thereby improving the sliding synchronization of the slide rail body.

[0011] In some embodiments of this utility model, the locking block is provided with guide surfaces on opposite sides along a first direction, and the corner of the positioning part is configured to be able to pass over the locking block along the guide surfaces.

[0012] In some embodiments of this utility model, the locking block is spherical.

[0013] In some embodiments of this utility model, the corner of the positioning part is provided with a convex arc surface, the convex arc surface abuts against the contact surface, and the convex arc surface is configured to slide along a first direction on the contact surface and pass over the locking block.

[0014] In some embodiments of this utility model, the locking block is located at the middle position of the outer rail along the second direction, the spring piece is located at the middle position of the middle rail along the second direction, and the latching block is located at the middle position of the inner rail along the second direction, the second direction being perpendicular to the first direction.

[0015] In some embodiments of this utility model, the limiting part extends along a third direction and passes through the through hole, the middle position of the middle rail along the second direction is a concave-convex part, the concave surface of the concave-convex part is disposed near the outer rail, the convex surface of the concave-convex part is disposed near the inner rail, the mounting part is disposed on the concave surface of the concave-convex part, and the third direction is perpendicular to the first direction and the second direction respectively.

[0016] In some embodiments of this utility model, one end of the limiting part is connected to the positioning part, and the other end is bent along a first direction away from the positioning part to form an extension. The extension is configured to engage with the outside of the through hole when the corner of the positioning part leaves the contact surface.

[0017] In some embodiments of this utility model, the mounting part, the positioning part, and the limiting part are integrally formed.

[0018] In some embodiments of this utility model, the outer rail and the middle rail, as well as the middle rail and the inner rail, are slidably connected by ball joints.

[0019] In some embodiments of this utility model, the outer rail, the middle rail, and the inner rail are all provided with beaded limiting structures on opposite sides along the first direction.

[0020] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the spring-loaded bidirectional interlocking slide rail according to an embodiment of the present utility model;

[0022] Figure 2 This is a structural schematic diagram of the outer rail according to an embodiment of the present utility model; wherein, Figure 2 (a) is a side view of the outer rail; Figure 2 (b) is the front view of the outer rail;

[0023] Figure 3 This is a structural schematic diagram of the middle rail according to an embodiment of the present utility model; wherein, Figure 3 (a) is a side view of the center rail; Figure 3 (b) is the front view of the center rail;

[0024] Figure 4 This is a structural schematic diagram of the inner rail according to an embodiment of the present utility model; wherein, Figure 4 (a) is a side view of the inner rail; Figure 4 (b) is the front view of the inner rail;

[0025] Figure 5 This is a schematic diagram of the spring clip provided according to an embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of the spring-loaded bidirectional interlocking slide rail in the retracted state according to an embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the spring-loaded bidirectional interlocking slide rail provided in the embodiment of the present utility model when the middle rail slides relative to the outer rail;

[0028] Figure 8 This is a schematic diagram of the structure of the spring-loaded bidirectional interlocking slide rail provided in the embodiment of the present utility model when the inner rail slides relative to the middle rail.

[0029] Reference numerals: 100, outer rail; 110, first limiting block; 200, middle rail; 210, connecting hole; 220, through hole; 230, second limiting block; 240, concave-convex part; 300, inner rail; 310, third limiting block; 410, first bead bar; 420, second bead bar; 510, locking block; 520, spring piece; 521, mounting part; 522, positioning part; 523, limiting part; 524, extension part; 530, locking block. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The following is for reference. Figures 1 to 8 This invention describes a spring-loaded bidirectional interlocking slide rail provided according to an embodiment of the present invention.

[0034] like Figures 1 to 8 As shown, the spring-loaded bidirectional interlocking slide rail according to an embodiment of the present invention has an extended state and a retracted state. The spring-loaded bidirectional interlocking slide rail can switch between the extended state and the retracted state under the action of external force, and can extend and retract in both directions. Moreover, the spring-loaded bidirectional interlocking slide rail can achieve bidirectional positioning and locking in the retracted state, and at the same time, it can improve the sliding synchronization.

[0035] like Figures 1 to 5 As shown, the structure of the spring-loaded bidirectional interlocking slide rail includes a slide rail body and a self-locking mechanism.

[0036] The slide rail body has an extended state and a retracted state. When the slide rail body is in the extended state, its total length reaches its maximum value; when the slide rail body is in the retracted state, its total length reaches its minimum value. The slide rail body has a first direction, a second direction, and a third direction, wherein the first direction is perpendicular to both the second and third directions, and the second direction is perpendicular to the third direction. In this embodiment, it is assumed that the first direction is the front-back direction, the second direction is the up-down direction, and the third direction is the left-right direction.

[0037] The slide rail body includes an outer rail 100, a middle rail 200, and an inner rail 300. The lengths of the outer rail 100, middle rail 200, and inner rail 300 extend along a first direction. In this embodiment, it is assumed that the widths of the outer rail 100, middle rail 200, and inner rail 300 all extend along a second direction, and the thicknesses of the outer rail 100, middle rail 200, and inner rail 300 all extend along a third direction. The outer rail 100, middle rail 200, and inner rail 300 are of equal length, with the width of the outer rail 100 greater than the width of the middle rail 200, and the width of the middle rail 200 greater than the width of the inner rail 300. The middle rail 200 is disposed within the outer rail 100, and the inner rail 300 is disposed within the middle rail 200. The outer rail 100, middle rail 200, and inner rail 300 are arranged sequentially along a third direction.

[0038] The middle rail 200 is slidably connected to both the outer rail 100 and the inner rail 300 along the first direction, allowing the middle rail 200 to slide relative to the outer rail 100 and the inner rail 300 along the first direction. Specifically, the outer rail 100 and the middle rail 200 are slidably connected via beaded strips, as are the middle rail 200 and the inner rail 300. Furthermore, the outer rail 100, the middle rail 200, and the inner rail 300 all have beaded strip limiting structures on opposite sides along the first direction.

[0039] In this embodiment, the middle rail 200 is disposed within the outer rail 100. The middle rail 200 has first bead strips 410 respectively on opposite sides along the second direction. The first bead strips 410 extend along the first direction. A first mounting area for installing the first bead strips 410 is defined between the middle rail 200 and the outer rail 100. The inner rail 300 is disposed within the middle rail 200. The inner rail 300 has second bead strips 420 respectively on opposite sides along the second direction. The second bead strips 420 extend along the first direction. A second mounting area for installing the second bead strips 420 is defined between the inner rail 300 and the middle rail 200.

[0040] In some examples, for each first bead 410, the outer rail 100 is provided with first limiting blocks 110 on opposite sides along the first direction. The first limiting blocks 110 are fixedly connected to the outer rail 100. The two first limiting blocks 110 serve as bead limiting structures, which can fix the first bead 410 on the outer rail 100, allowing the middle rail 200 to slide smoothly and with low friction relative to the outer rail 100 under the action of the first bead 410, and preventing the first bead 410 from displacing relative to the outer rail 100. In other examples, the middle rail 200 is provided with fourth limiting blocks on opposite sides along the first direction. The fourth limiting blocks are fixedly connected to the middle rail 200. The two fourth limiting blocks serve as bead limiting structures, which can fix the first bead 410 on the middle rail 200, preventing the first bead 410 from displacing relative to the middle rail 200.

[0041] In some examples, for each second bead 420, the middle rail 200 is provided with second limiting blocks 230 on opposite sides along the first direction. The second limiting blocks 230 are fixedly connected to the middle rail 200. The two second limiting blocks 230 serve as bead limiting structures, which can fix the second bead 420 on the middle rail 200 and prevent the second bead 420 from shifting relative to the middle rail 200. In other examples, for each second bead 420, the inner rail 300 is provided with third limiting blocks 310 on opposite sides along the first direction. The third limiting blocks 310 are fixedly connected to the inner rail 300. The two third limiting blocks 310 serve as bead limiting structures, which can fix the second bead 420 on the inner rail 300 and prevent the second bead 420 from shifting relative to the inner rail 300.

[0042] It is understood that in this embodiment, the slide rail body adopts a ball bearing structure design, but it is not excluded that in other embodiments, the slide rail body adopts a roller or gear structure design. As a three-section slide rail, the slide rail body mainly includes an outer rail 100, a middle rail 200, and an inner rail 300, and their cross-sectional dimensions decrease sequentially. Therefore, the inner rail 300 is disposed within the middle rail 200, and the middle rail 200 is disposed within the outer rail 100. The main walls of the outer rail 100, middle rail 200, and inner rail 300 are parallel to each other. If the outer rail 100 is fixed to the frame, the inner rail 300 supports the moving load, such as a drawer or panel. The middle rail 200 is installed between the inner rail 300 and the outer rail 100 to increase the effective sliding stroke of the three-section slide rail.

[0043] The outer rail 100 has a contact surface located close to the middle rail 200. The contact surface is flat and smooth with a low coefficient of friction. In this embodiment, the contact surface is located on the side of the outer rail 100 that is close to the middle rail 200 along a third direction, and the contact surface extends along a first direction. The middle rail 200 has through holes 220 on opposite sides along the first direction, and the through holes 220 penetrate the middle rail 200 along a third direction.

[0044] Two self-locking mechanisms are provided, and the two self-locking mechanisms are symmetrically arranged along the first direction. Each self-locking mechanism includes a locking block 510, a spring piece 520, and a locking block 530. The locking block 510 is disposed on the contact surface of the outer rail 100, and the locking block 530 is disposed on the inner rail 300, located on the side of the inner rail 300 facing upwards along the third direction, closer to the middle rail 200. The locking block 510 and the locking block 530 can be installed using screws, welding, or other methods. In this embodiment, the locking block 530 is an isosceles trapezoid when viewed along the first direction.

[0045] The spring clip 520 includes a mounting portion 521, a positioning portion 522, and a limiting portion 523. The mounting portion 521, positioning portion 522, and limiting portion 523 are sequentially connected along a first direction. In this embodiment, the mounting portion 521, positioning portion 522, and limiting portion 523 are integrally formed. The mounting portion 521 is disposed on the middle rail 200. Specifically, the middle rail 200 has at least one connecting hole 210, and the mounting portion 521 is connected to the connecting hole 210 by screws, thereby fixing the mounting portion 521 to the middle rail 200.

[0046] The positioning part 522 is V-shaped when viewed in the second direction. Both ends of the positioning part 522 are fixedly connected to the mounting part 521 and the limiting part 523, respectively. The positioning part 522 has a corner, which is configured to slide along the first direction on the contact surface of the outer rail 100 and pass over the locking block 510. The positioning part 522 or the limiting part 523 passes through the through hole 220. The locking block 510 can engage and lock the positioning part 522, and the limiting part 523 can engage and lock the locking block 530.

[0047] Understandably, in some examples, the positioning part 522 is disposed through the through hole 220 of the middle rail 200, so that the positioning part 522 is positioned close to the outer rail 100, allowing the positioning part 522 to abut against the contact surface or locking block 510. In this case, the mounting part 521 and the limiting part 523 are positioned close to the inner rail 300. In other examples, the limiting part 523 is disposed through the through hole 220 of the middle rail 200, so that the limiting part 523 is positioned close to the inner rail 300, allowing the limiting part 523 to engage with the locking block 530. In this case, the mounting part 521 and the positioning part 522 are positioned close to the outer rail 100.

[0048] like Figure 6 As shown, when the slide rail body is in the retracted state, the two locking blocks 510 are located on opposite sides of the two positioning parts 522 along the first direction. At this time, the corners of the positioning parts 522 abut against the contact surface, and the two locking blocks 510 respectively engage and lock with the corners of the two positioning parts 522, so that the middle rail 200 is blocked on opposite sides of the first direction, so that the middle rail 200 can be fixed relative to the outer rail 100. Furthermore, the two limiting parts 523 are located on opposite sides of the two locking blocks 530 along the first direction. Since the corner of the positioning part 522 abuts against the contact surface, the spring piece 520 is deformed by force, allowing the limiting parts 523 to move upward and approach the locking blocks 530. This causes the two limiting parts 523 to engage and lock with the two locking blocks 530 respectively, so that the inner rail 300 is blocked on both opposite sides of the first direction. This allows the inner rail 300 to be fixed relative to the middle rail 200, thereby preventing the inner rail 300 from moving freely in both directions or sliding out of the outer rail 100 before the middle rail 200 when the middle rail 200 is locked.

[0049] Therefore, by setting two self-locking mechanisms, the slide rail body can be positioned and locked in both directions when it is in the retracted state.

[0050] When the slide rail body needs to be switched from the retracted state to the extended state, the user can apply a certain pushing or pulling force to the inner rail 300, allowing the inner rail 300 to move unidirectionally along either side of the first direction. During this process, since the positioning part 522 is V-shaped, when the corner of the positioning part 522 passes the locking block 510, the locking block 510 can apply a squeezing force to the inclined surface of the positioning part 522, causing the positioning part 522 to deform, so that the corner of the positioning part 522 moves upward and can pass the locking block 510. After the positioning part 522 passes the locking block 510, the positioning part 522 will abut against the contact surface and continue to move linearly along the contact surface.

[0051] When the corner of the positioning part 522 leaves the contact surface, the positioning part 522 is configured to move the limiting part 523 away from the locking block 530 to release the locking function. Specifically, as Figure 7 and Figure 8 As shown, when the corner of the positioning part 522 leaves the contact surface, the corner of the positioning part 522 loses the squeezing effect applied by the contact surface, and the positioning part 522 will automatically return to its original state to complete the reset work. At this time, the corner of the positioning part 522 will move downward, so that the positioning part 522 can drive the limiting part 523 to move downward, allowing the limiting part 523 to move away from the locking block 530, thereby releasing the locking effect between the limiting part 523 and the locking block 530. Then, the inner rail 300 can slide relative to the middle rail 200.

[0052] At this time, the inner rail 300 and the middle rail 200 can move linearly in the same direction to make the slide rail body in the unfolded state. When the slide rail body is in the unfolded state, both locking blocks 530 are separated from the limiting part 523 of the corresponding spring piece 520. At this time, the locking block 510 near the inner rail 300 will apply a locking action to the positioning part 522 on the middle rail 200 away from the inner rail 300 to prevent the middle rail 200 from easily and completely separating from the outer rail 100.

[0053] During the movement of the inner rail 300 and the middle rail 200 in the same direction, the positioning part 522 of another spring piece 520 on the middle rail 200 remains abutting against the contact surface and slides along the contact surface, so that the limiting part 523 of the spring piece 520 can engage and lock another locking block 530 on the inner rail 300, preventing the inner rail 300 from moving in the opposite direction relative to the middle rail 200 during the sliding out process. For example, when the middle rail 200 moves forward relative to the outer rail 100, the inner rail 300 cannot move in the opposite direction to the rear side of the outer rail 100.

[0054] It is understandable that when the inner rail 300 slides out relative to the outer rail 100 along one side of the first direction, the middle rail 200 will necessarily be located on the same side of the outer rail 100 along the first direction as the inner rail 300. When the inner rail 300 retracts relative to the outer rail 100 along one side of the first direction, the middle rail 200 will also retract along with the inner rail 300. This avoids situations where the inner rail 300 and the middle rail 200 are located on opposite sides of the outer rail 100 along the first direction, or where the inner rail 300 has completely retracted into the outer rail 100 while the middle rail 200 is still outside the outer rail 100. This improves the synchronicity of the movement of the slide rail body.

[0055] When the slide rail body needs to be switched from the extended state to the retracted state, the user can apply external force to the inner rail 300, causing the inner rail 300 to move relative to the middle rail 200 in the first direction until the limiting part 523 on the middle rail 200 away from the inner rail 300 engages with the locking block 530 on the inner rail 300 near the outer rail 100. At this time, the inner rail 300 can push the middle rail 200, causing the middle rail 200 to retract into the outer rail 100 along with the inner rail 300. When the positioning part 522 on the middle rail 200 away from the outer rail 100 abuts against the contact surface of the outer rail 100, the positioning part 522 will be subjected to pressure from the contact surface, causing the positioning part 522 to deform under force and drive the limiting part 523 to move upward, so that the limiting part 523 can engage and lock the corresponding locking block 530.

[0056] In some examples, such as Figure 6 As shown, when the slide rail body is in the retracted state, the mounting part 521 is located on the side of the positioning part 522 away from the locking block 510 along the first direction. At this time, the positioning part 522 is located inside the corresponding locking block 510, and the limiting part 523 is located outside the corresponding locking block 530. The locking block 530 and the corresponding locking block 510 are arranged vertically opposite each other.

[0057] In other examples, when the slide rail body is in the retracted state, the mounting part 521 is located on the side of the positioning part 522 close to the locking block 510 along the first direction. At this time, the positioning part 522 is located inside the corresponding locking block 510, the limiting part 523 is located outside the corresponding locking block 530, and the locking block 530 is located inside the locking block 510.

[0058] In some embodiments, the locking block 510 may be a block in the shape of a square prism. Since the positioning part 522 is V-shaped and has inclined surfaces on opposite sides along the first direction, during the movement of the positioning part 522 relative to the locking block 510 in the first direction, the locking block 510 can slide relative to the positioning part 522 along the corresponding inclined surface of the positioning part 522, so that the positioning part 522 can pass over the locking block 510.

[0059] In other embodiments, the locking block 510 has guide surfaces on opposite sides along the first direction, and the corner of the positioning part 522 is configured to extend beyond the locking block 510 along the guide surfaces. It is understood that the guide surfaces can be planar or curved. The locking block 510 can be a triangular, isosceles trapezoidal, or semi-cylindrical block. The corners of the block can be rounded. In this embodiment, as... Figure 1 , Figures 6 to 8 As shown, the locking block 510 is spherical in shape. The spherical locking block 510 can be directly manufactured on the outer rail 100 using existing stamping processes.

[0060] In some embodiments, such as Figure 5 As shown, the corner of the positioning part 522 has a convex arc surface, which abuts against the contact surface of the outer rail 100. Furthermore, the convex arc surface is configured to slide along a first direction on the contact surface of the outer rail 100 and pass over the locking block 510. It is understood that the smooth surface of the convex arc surface, abutting against the smooth contact surface, can reduce the friction between the convex arc surface and the contact surface. In addition, the positioning part 522 corresponding to the position of the convex arc surface can be thickened.

[0061] Of course, it is possible that in other embodiments, the corner of the positioning part 522 is a sharp corner.

[0062] In some embodiments, such as Figures 1 to 4 As shown, the locking block 510 is located at the center of the outer rail 100 along the second direction, the spring piece 520 is located at the center of the middle rail 200 along the second direction, and the latching block 530 is located at the center of the inner rail 300 along the second direction. The locking block 510 and the latching block 530 are located on opposite sides of the spring piece 520 along the third direction.

[0063] In some embodiments, such as Figure 1 , Figure 3 , Figures 6 to 8 As shown, the length of the limiting part 523 extends along a third direction, and the limiting part 523 passes through the through hole 220 of the middle rail 200. The dimension of the through hole 220 along the first direction is larger than the dimension of the limiting part 523 along the first direction, allowing the positioning part 522 to drive the limiting part 523 to move along the first direction and the third direction respectively. In this embodiment, the through hole 220 is a rectangular opening.

[0064] like Figure 1As shown, the middle section of the middle rail 200 along the second direction is a concave-convex portion 240. The concave surface of the concave-convex portion 240 is positioned near the outer rail 100, and the convex surface is positioned near the inner rail 300. The mounting portion 521 is disposed on the concave surface of the concave-convex portion 240. This arrangement increases the third-direction distance between the contact surfaces of the concave-convex portion 240 and the outer rail 100, providing sufficient space to accommodate the positioning portion 522.

[0065] Of course, it is not excluded that in other embodiments, the length direction of the limiting part 523 forms a certain acute angle with the first direction.

[0066] Furthermore, such as Figure 5 As shown, one end of the limiting part 523 is fixedly connected to the positioning part 522, and the other end of the limiting part 523 is provided with an extension part 524, which is integrally formed with the limiting part 523. Specifically, the other end of the limiting part 523 is bent along the first direction away from the positioning part 522 to form the extension part 524. The extension part 524 is configured to engage with the outside of the through hole 220 when the corner of the positioning part 522 leaves the contact surface. The length direction of the extension part 524 can be parallel to the first direction or at a certain angle to the first direction. In this embodiment, the end of the extension part 524 away from the limiting part 523 is inclined downward.

[0067] Understandably, by providing the extension portion 524, the limiting portion 523 is always kept in the state of passing through the through hole 220, so as to avoid the situation where the limiting portion 523 completely passes through the through hole 220 after the corner of the positioning portion 522 leaves the contact surface, and thus the limiting portion 523 cannot pass through the through hole 220 when the corner of the positioning portion 522 abuts against the contact surface again, causing the limiting portion 523 to be unable to perform the locking function on the corresponding block 530.

[0068] In the spring-loaded bidirectional interlocking slide rail provided in this embodiment of the utility model, since self-locking mechanisms are symmetrically arranged along the first direction on opposite sides of the slide rail body, the slide rail body simultaneously possesses both bidirectional sliding and bidirectional self-locking functions, making it difficult for the slide rail body to slide out and unfold when retracted. When the slide rail body is in the retracted state, the two locking blocks 510 on the outer rail 100 will respectively apply a certain locking and blocking effect to the positioning part 522 of the corresponding spring piece 520 on the middle rail 200, so that the middle rail 200 can remain stationary relative to the outer rail 100 in the first direction without human intervention. At the same time, the limiting part 523 of the two spring pieces 520 on the middle rail 200 will respectively apply a certain locking and blocking effect to the corresponding locking block 530 on the inner rail 300, so that the inner rail 300 can remain stationary relative to the middle rail 200 in the first direction without human intervention, thereby realizing that the slide rail body is in the retracted self-locking state.

[0069] When a certain external force is applied to the inner rail 300, causing it to move along any side in the first direction, the inner rail 300 will move the middle rail 200 in a straight line due to the locking effect between the locking block 530 and the limiting part 523 of the spring piece 520. During this process, the positioning part 522 of the corresponding spring piece 520 will slide along the contact surface and pass over the locking block 510, allowing the positioning part 522 of the spring piece 520 to leave the contact surface in the future. At the same time, the positioning part 522 can drive the limiting part 523 away from the locking block 530 in the third direction to release the locking effect between the limiting part 523 and the locking block 530, thereby allowing the inner rail 300 to slide relative to the middle rail 200 and causing the slide rail body to extend into place.

[0070] Furthermore, since the positioning part 522 of the other spring piece 520 remains in contact with the contact surface of the outer rail 100, the limiting part 523 of the spring piece 520 can lock the other locking block 530. Therefore, it can prevent the inner rail 300 from moving in the opposite direction to the middle rail 200 to the other side of the outer rail 100 during the unfolding of the slide rail body, so that the inner rail 300 and the middle rail 200 are located on opposite sides of the outer rail 100 along the first direction, thus improving the sliding synchronization of the slide rail body.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A spring-loaded bidirectional interlocking slide rail, characterized in that, include: The slide rail body has an unfolded state and a retracted state. The slide rail body includes an outer rail, a middle rail and an inner rail, all extending along a first direction. The outer rail is provided with a contact surface. The middle rail is slidably connected to the outer rail and the inner rail along the first direction. The middle rail is provided with through holes on opposite sides along the first direction. The self-locking mechanism has two parts, which are symmetrically arranged along a first direction. The self-locking mechanism includes a locking block, a spring piece, and a locking block. The locking block is located on the contact surface, and the locking block is located on the inner rail. The spring piece includes a mounting part, a positioning part, and a limiting part connected in sequence along the first direction. The mounting part is located on the middle rail, and the positioning part is V-shaped. The corner of the positioning part is configured to slide along the first direction on the contact surface and pass over the locking block. The positioning part or the limiting part passes through the through hole. When the slide rail body is in the retracted state, the two locking blocks are respectively engaged with the corners of the two positioning parts, and the two limiting parts are respectively engaged with the two locking blocks; when the corner of the positioning part leaves the contact surface, the positioning part is configured to drive the limiting part away from the locking block to release the engagement and locking effect.

2. The spring-loaded bidirectional interlocking slide rail according to claim 1, characterized in that, The locking block has guide surfaces on opposite sides along the first direction, and the corner of the positioning part is configured to pass over the locking block along the guide surfaces.

3. The spring-loaded bidirectional interlocking slide rail according to claim 2, characterized in that, The locking block is spherical.

4. The spring-loaded bidirectional interlocking slide rail according to claim 1, characterized in that, The corner of the positioning part is provided with a convex arc surface, which abuts against the contact surface. The convex arc surface is configured to slide along a first direction on the contact surface and pass over the locking block.

5. The spring-loaded bidirectional interlocking slide rail according to claim 1, characterized in that, The locking block is located at the middle position of the outer rail along the second direction, the spring piece is located at the middle position of the middle rail along the second direction, and the latch is located at the middle position of the inner rail along the second direction, the second direction being perpendicular to the first direction.

6. The spring-loaded bidirectional interlocking slide rail according to claim 5, characterized in that, The limiting part extends along the third direction and passes through the through hole. The middle part of the middle rail along the second direction is a concave-convex part. The concave surface of the concave-convex part is set close to the outer rail, and the convex surface of the concave-convex part is set close to the inner rail. The mounting part is set on the concave surface of the concave-convex part. The third direction is perpendicular to the first direction and the second direction, respectively.

7. The spring-loaded bidirectional interlocking slide rail according to claim 6, characterized in that, One end of the limiting part is connected to the positioning part, and the other end is bent in a first direction away from the positioning part to form an extension. The extension is configured to engage with the outside of the through hole when the corner of the positioning part leaves the contact surface.

8. The spring-loaded bidirectional interlocking slide rail according to any one of claims 1 to 7, characterized in that, The mounting part, the positioning part, and the limiting part are integrally formed.

9. The spring-loaded bidirectional interlocking slide rail according to claim 1, characterized in that, The outer rail and the middle rail, as well as the middle rail and the inner rail, are slidably connected by ball joints.

10. The spring-loaded bidirectional interlocking slide rail according to claim 9, characterized in that, The outer rail, the middle rail, and the inner rail are all provided with beaded limiting structures on opposite sides along the first direction.

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