A synchronous concealed three-section rail

Abstract

The utility model discloses a synchronous hidden three-section rail belongs to slide rail technical field. The three-section rail includes fixed rail, linkage rail, and with the first and second linkage rack for realizing synchronous movement and the linkage mechanism meshed with rack. The utility model aims at solving the problem that the existing slide rail is in the closing of drawer, and the dynamic slide rail front end is suspended, thereby causing the problem of drooping, shaking under heavy load. For this purpose, the utility model is equipped with a bearing device in the front end of the dynamic slide rail, and the bearing device is used to provide additional load bearing support for the front end of the dynamic slide rail when the drawer is in the closed state. The utility model improves the stress structure of the drawer under the closed state through the bearing device, and significantly improves the structural stability, the mute effect and the durability of long-term use of the heavy load drawer.

Description

Technical Field This utility model relates to the field of slide rail technology, and in particular to a synchronous concealed three-section rail. Background Technology Synchronous concealed three-section rails are widely used in modern furniture and cabinets due to their smooth operation, high load-bearing capacity, and concealed installation. They typically consist of fixed rails, linked rails, and movable rails, with relative sliding achieved through rolling element retainers positioned between the rails. However, existing synchronous concealed three-section rails generally suffer from an inherent structural flaw: When the drawer is pushed to the fully closed position, the rolling element retainer that supports the sliding between the rails will retract to the rear end of the entire slide system along with the connecting rail and the moving rail.

[0001] This results in the front end of the sliding slide (i.e., the end closest to the drawer panel and the outermost end when closed) not having any rolling components or structural parts underneath to provide effective vertical support, making it appear to be suspended near the front of the cabinet.

[0002] For drawers with lighter loads, the impact of this suspended state is not significant. However, for heavy-duty drawers installed in kitchens, tool cabinets, and other similar locations, this suspended state can cause the drawer front to sag and wobble noticeably when closed due to the leverage effect, or lead to increased gaps at the front end after long-term use. This severely affects the drawer's stability when closed, its noise reduction, and its long-term durability. Therefore, solving this problem is a technical direction that urgently needs improvement in this field. Utility Model Content The purpose of this utility model is to provide a synchronous concealed three-section slide rail, which aims to solve the technical problem in the prior art where, when the drawer is closed, the rolling element retainers of the synchronous concealed three-section slide rail are all retracted to the rear end, causing the front end of the slide rail to be suspended in the air, thus causing the front end of the drawer to sag, wobble, and become unstable under heavy load.

[0003] This utility model is achieved through the following technical solution: A synchronous concealed three-section slide rail includes a fixed rail for connecting to a cabinet, a movable slide rail for connecting to a drawer, and a linkage rail located between the two. A first movable frame is provided between the fixed rail and the linkage rail, and a first linkage rack is fixedly mounted on the first movable frame. At least one second movable frame is provided between the linkage rail and the movable slide rail, and a second linkage rack is fixedly mounted on the movable slide rail. A linkage mechanism that meshes with the first and second linkage racks is installed on the linkage rail. A load-bearing device is provided at the front end of the movable slide rail, and the load-bearing device is used to provide front-end support when the drawer is closed.

[0004] As described above, the synchronous concealed three-section rail has a load-bearing device including a mounting bracket detachably connected to the front end of the movable slide rail, and the mounting bracket is provided with load-bearing wheels.

[0005] As described above, the synchronous concealed three-section rail has a mounting groove at the front end of the movable slide rail, a locking hole on one side of the movable slide rail, and a mating part that matches the mounting groove and a buckle that matches the locking hole on the mounting bracket.

[0006] As described above, the synchronous concealed three-section rail includes a linkage mechanism comprising an assembly hole on the linkage rail, a gear support detachably connected to the assembly hole, a linkage gear rotatably connected to the gear support, and the linkage gear passing through the assembly hole and meshing with the first linkage rack and the second linkage rack respectively.

[0007] As described above, in the synchronous concealed three-section rail, a flange is provided on one side of the linkage gear of the linkage mechanism, and a linear guide position is provided on the second linkage rack to cooperate with the flange. The flange and the linear guide position are used to jointly limit the meshing depth between the linkage gear and the second linkage rack, so as to prevent the tooth tip of the linkage gear from hitting the tooth root of the second linkage rack.

[0008] As described above, the synchronous concealed three-section rail has an L-shaped cross-section and at least one recessed reinforcing rib at the bend.

[0009] As described above, in the synchronous concealed three-section rail, the bends of the fixed rail are treated with rounded corners, and the rounded corners have a preset radius R. The preset radius R is used to achieve stress dispersion and improve the load-bearing capacity of the fixed rail.

[0010] As described above, the synchronous concealed three-section rail has triangular reinforcing ribs on both sides of the recessed reinforcing rib.

[0011] As described above, the synchronous concealed three-section rail has inwardly recessed reinforcing parts on the inner walls of the middle of both sides of the movable slide rail. Multiple balls are installed on both sides of the second movable frame. Multiple rollers that are tactilely connected to the bottom of the movable slide rail are provided at the upper end of the second movable frame. First mating parts that are tactilely connected to the outer sides of the multiple balls are provided on the inner walls of the lower ends of both sides of the movable slide rail. Second mating parts that are tactilely connected to the inner sides of the multiple balls are provided on the outer walls of both sides of the upper part of the linkage rail.

[0012] As described above, the synchronous concealed three-section rail is further provided with a buffer damping mechanism on the fixed rail. The buffer damping mechanism includes a buffer base fixedly connected to the fixed rail. The bottom of the buffer base is provided with a hydraulic damper and an elastic element arranged parallel to it. The same end of the elastic element and the hydraulic damper is provided with a slider connected to both. The slider is hinged with a locking element that can lock with the drawer. The other end of the elastic element is connected to an adjustment mechanism for adjusting its extension length. The adjustment mechanism includes an adjustment gear rotatably connected to the buffer base, the adjustment gear meshing with an adjustment rack, and the adjustment rack being connected to the elastic element. Compared with the prior art, the present invention has the following advantages: This invention adds a load-bearing device to the front end of the movable slide rail, allowing it to abut against the cabinet or other fixed structure when the drawer is closed, thus providing additional and stable support. This solves the problem of the front end of the movable slide rail being suspended in the air due to the rolling element retainer retracting to the rear in existing technologies. It significantly improves the overall stress structure of the drawer when closed, substantially enhances the structural stability of heavy-duty drawers when closed, effectively prevents sagging or wobbling of the drawer panel due to the front end being suspended, and ensures the drawer's closing stability and long-term durability. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of the utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of this embodiment. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of this embodiment. Figure 2 ; Figure 3 This is a three-dimensional exploded view of the structure of this embodiment; Figure 4 This is a front view of this embodiment; Figure 5 This is the rear view of this embodiment; Figure 6 for Figure 5 A schematic diagram of the decomposition process; Figure 7 This is a partially exploded view of the front end of the moving slide rail in this embodiment; Figure 8 This is an exploded view of the linkage mechanism in this embodiment; Figure 9 This is a three-dimensional structural diagram of the second linkage rack in this embodiment; Figure 10This is a schematic diagram showing the connection between the moving slide rail and the linkage rail in this embodiment; Figure 11 for Figure 10 A sectional view along line AA. Figure 12 This is a three-dimensional structural diagram of the fixed rail in this embodiment; Figure 13 This is a three-dimensional structural diagram of the buffer damping mechanism in this embodiment. Detailed Implementation To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0014] It should be noted that in the description of this utility model, the terms "front end", "rear end", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] Please see the appendix Figures 1 to 13 This embodiment provides a synchronous concealed three-section rail. The three-section rail is a concealed slide rail installed at the bottom of the drawer, used to achieve smooth pulling and synchronous movement of the drawer (not shown).

[0016] The basic structure of the synchronous concealed three-section rail includes a fixed rail 1 for fixed connection to the side wall of the cabinet (not shown); a movable slide rail 2 for fixed connection to the bottom of the drawer; and a linkage rail 3 located between the fixed rail 1 and the movable slide rail 2.

[0017] To achieve a relative sliding connection between the three rails, a first movable frame 4 is provided between the fixed rail 1 and the linkage rail 3, and is rolledly connected to both. Simultaneously, at least one second movable frame 5 is provided between the linkage rail 3 and the movable slide rail 2, and is rolledly connected to both. The first movable frame 4 and the second movable frame 5 can specifically be ball retainers and / or roller retainers, or retainers that simultaneously possess balls and rollers, achieving low-friction rolling through the housed balls and / or rollers.

[0018] To achieve synchronous unfolding of the three rails, i.e., to ensure equal speed difference movement of all three when the drawer is pulled out, this embodiment incorporates a synchronous transmission mechanism. Specifically, a first linkage rack 41 is securely mounted on the first movable frame 4. A second linkage rack 21 is also securely mounted on the movable slide rail 2 (e.g., on its bottom or inner side wall). A linkage mechanism 6 containing gears is installed on the linkage rail 3, and the gears of this linkage mechanism 6 mesh simultaneously with both the first linkage rack 41 and the second linkage rack 21. When the movable slide rail 2 moves, the gear transmission of the linkage mechanism 6 forces the first movable frame 4 to move synchronously at a preset speed ratio, thereby driving the linkage rail 3 to smoothly and synchronously unfold or retract.

[0019] As a core improvement of this embodiment, a load-bearing device 7 is provided at the front end of the movable slide rail 2, i.e., near the drawer panel, at the outermost end when all slide rails are fully retracted. It should be noted that in conventional three-section slide rail structures known in the art, when the drawer is fully closed, the movable slide rail 2 and the linkage rail 3 are completely housed within the fixed rail 1. At this time, the rolling element retainers (i.e., the first movable retainer 4 and the second movable retainer 5 in this embodiment) used to support the rolling connection between them are also completely retracted to the rear end of the slide rail.

[0020] This leads to a common technical problem: when the front end of the sliding slide 2 (i.e. the part near the drawer panel) is closed, there are no rolling parts underneath it to provide effective vertical support, making it appear to be suspended in the air.

[0021] For drawers with lighter loads, the impact of this suspended state is not obvious. However, for heavy-duty drawers installed in modern kitchens, tool cabinets, and other similar locations, this front-end suspension means that most of the weight of the drawer and its contents is applied to the movable shelves 4 and 5 located at the rear. Due to the lever principle, this unbalanced force structure can easily cause the drawer front to sag slightly or wobble when closed, or, after long-term use, lead to increased gaps at the front end, or even produce abnormal noises when closing.

[0022] The load-bearing device 7 provided in this embodiment is designed to compensate for the aforementioned deficiencies. It provides an additional, stable load-bearing support to the front end of the movable slide rail 2 when the drawer is fully closed. This design greatly improves the overall stress structure of the drawer when it is closed, changing from a single rear-end support to a combined front and rear-end support. This effectively solves the problem of drawer sagging or wobbling caused by the front end being suspended, and significantly improves the stability, noise reduction, and long-term durability of the heavy-duty drawer when closed.

[0023] Furthermore, in a preferred embodiment, the load-bearing device 7 specifically includes a mounting bracket 71 and a load-bearing wheel 72 mounted on the mounting bracket 71. The mounting bracket 71 is designed to be detachably connected to the front end of the movable slide rail 2. During operation, as the drawer is pushed to the closed position, the load-bearing wheel 72 moves synchronously into the cabinet along with the front end of the movable slide rail 2. When the drawer is about to reach or just reaches the fully closed state, the outer periphery of the load-bearing wheel 72 rolls against the fixed structure of the cabinet. The fixed structure of the cabinet can be the inner wall of the front upright or front crossbeam of the cabinet, or a support surface specifically installed on the front frame of the cabinet.

[0024] Through this contact, the load-bearing roller 72 transfers the vertical load borne by the front end of the movable slide rail 2 to the more rigid cabinet body structure in real time with low friction. This provides a precise and stable physical support point for the front end of the movable slide rail 2, which was originally in a suspended state, thereby effectively suppressing the sagging of the front end and ensuring uniform gaps and high stability of the drawer when closed.

[0025] For more details, please refer to Figure 7 To facilitate easy assembly and disassembly of the mounting bracket 71 and the movable slide rail 2, the front end of the movable slide rail 2 is integrally stamped or has a mounting groove 22, and a locking hole 23 is provided on one side (e.g., the top side or both sides) of the movable slide rail 2. Correspondingly, the mounting bracket 71 is integrally injection molded or machined with a mating part 711 that matches the shape of the mounting groove 22, and an elastic buckle 712 that fits into the locking hole 23. During assembly, the worker only needs to align the mating part 711 with the mounting groove 22 and insert it, then press the mounting bracket 71 so that the buckle 712 springs into the locking hole 23 to lock it in place, without the need for additional tools, greatly improving production efficiency. Of course, those skilled in the art will understand that the detachable connection here can also be achieved by screws, pins, or other known fasteners.

[0026] Furthermore, for a preferred embodiment of this invention, please refer to the following for details. Figures 8 to 11 A mounting hole 31 is provided at a corresponding position on the linkage rail 3. The linkage mechanism 6 includes a gear support 61, which is detachably connected to the mounting hole 31 by means of snap-fit ​​or screws. A linkage gear 62 is rotatably connected to the gear support 61. After assembly, the main body of the linkage gear 62 passes through the mounting hole 31, so that its teeth can be exposed on the inner and outer sides of the linkage rail 3, thereby correctly meshing with the first linkage rack 41 and the second linkage rack 21. This design, in which the gear and support are separate and the support is detachable, greatly facilitates the installation and subsequent maintenance of the linkage mechanism.

[0027] Furthermore, to ensure the accuracy and stability of the meshing between the linkage gear 62 and the rack, a disc-shaped flange 621 is integrally formed or fixedly connected to the side of the linkage gear 62 near the second linkage rack 21. Correspondingly, a linear guide position 211 (e.g., a straight protrusion) is machined or provided on the second linkage rack 21, beside its teeth, to mate with the flange 621. During the slide rail movement, the flange 621 always slides against the linear guide position 211. This mating structure allows the flange 621 and the linear guide position 211 to jointly limit the meshing depth between the linkage gear 62 and the second linkage rack 21. This structure effectively prevents the tooth tip of the linkage gear 62 from pressing against the tooth root of the second linkage rack 21 due to assembly errors or vibration, preventing transmission jamming, tooth skipping, or abnormal wear, and ensuring the long-term reliable operation of the synchronization mechanism.

[0028] Furthermore, as a preferred embodiment of this example, please refer to... Figure 4 , Figure 12 To improve the overall load-bearing capacity and structural rigidity of the slide rail, the cross-sectional structure of the fixed rail 1 was reinforced. The fixed rail 1 has an L-shaped cross-section, which makes it suitable for installation at the bottom of the cabinet side panel, achieving concealed installation. Furthermore, at the bend of the L-shaped cross-section (i.e., the junction of the vertical and horizontal planes), at least one recessed reinforcing rib 11 is integrally formed by stamping.

[0029] Furthermore, the bends of the fixed rail 1, i.e., the inner or outer corners of the L-shape, are rounded to replace the traditional sharp 90-degree right angles. These rounded corners have a preset radius R determined through engineering mechanics calculations and finite element analysis (FEA). Compared to sharp right-angle bends, this rounded corner transition effectively disperses stress concentration at the bend when the rail is subjected to vertical loads. The preset radius R is designed to optimize stress dispersion, thereby significantly improving the bending strength and overall load-bearing capacity of the fixed rail 1.

[0030] Specifically, the preset radius R can be set to 2.0mm to 3.0mm according to the thickness and strength requirements of the plate. In this embodiment, R=2.5mm is preferred, which enables the internal stress caused by the load to be smoothly transitioned and effectively dispersed at the bending point. The design of the preset radius R is used to optimize the stress distribution in this area, avoid excessive stress concentration, and thus significantly improve the bending strength, ultimate load-bearing capacity, and long-term fatigue durability of the fixed rail 1.

[0031] Furthermore, as a composite reinforcement structure, triangular reinforcing ribs 12 are symmetrically arranged on both sides of the sunken reinforcing rib 11. These triangular reinforcing ribs 12 utilize the stability principle of triangles to further enhance the torsional and deformation resistance of the L-shaped bend area, enabling the fixed rail 1 to maintain high stability even under heavy loads. In one embodiment, these triangular reinforcing ribs 12 can be integrally formed with the fixed rail 1 body through a stamping process, forming localized 45-degree reinforcing ribs between the vertical mounting flange and the horizontal support flange at the L-shaped bend.

[0032] As an alternative implementation, the triangular reinforcing rib 12 can also be a separately manufactured reinforcing piece, such as a precision-stamped triangular metal sheet. These separate reinforcing pieces are then securely connected to the inner corner of the L-shaped bend of the fixed rail 1 via welding, forming a rigid connection between the vertical and horizontal flanges.

[0033] Furthermore, as a preferred embodiment of this invention, the rolling fit structure between the movable slide rail 2, the linkage rail 3, and the second movable frame 5 has been optimized to improve the smoothness of sliding and the load-bearing capacity. Specifically, concave reinforcing portions 24 are stamped on the inner walls of the middle portion of both sides of the movable slide rail 2, which improves the cross-sectional rigidity of the movable slide rail 2 profile. Multiple rows of ball bearings are installed on both sides of the second movable frame 5 to bear the main lateral force. At the same time, multiple rollers that are rollingly connected to the bottom of the movable slide rail 2 can also be provided at the upper end of the second movable frame 5 to bear the main vertical load. Correspondingly, first mating portions 25 that are rollingly connected to the outer sides of the multiple ball bearings are provided on the inner walls of the lower ends of both sides of the movable slide rail 2. Second mating portions 32 that are rollingly connected to the inner sides of the multiple ball bearings are also provided on the upper outer walls of both sides of the linkage rail 3. Both the first mating part 25 and the second mating part 32 are precision raceway grooves. In terms of manufacturing process, these two raceway grooves can be formed either through high-precision cold drawing or subsequent machining; or, as a preferred embodiment balancing high efficiency and high precision, directly by using a mold to precisely position and integrally bend the metal sheet during roll forming or stamping bending processes to form the raceway groove structure. This type of raceway groove formed by bending also provides precise constraint and a smooth rolling surface for the balls. Through the combined bearing capacity of the balls and rollers, and the reinforcements and precision raceways provided on the moving slide rail 2 and the linkage rail 3, the rolling connection between the moving slide rail 2 and the linkage rail 3 becomes more stable and smooth, and both load-bearing capacity and durability are improved.

[0034] Furthermore, as a preferred embodiment of this invention, in order to achieve the drawer's soft-close and automatic latching functions, a soft-close mechanism is also provided on the fixed rail 1. This soft-close mechanism includes a soft-close base 8, which is installed on the rear of the fixed rail 1 by means of snap-fit ​​or screw fixing. A hydraulic damper 81 is provided at the bottom of the soft-close base 8, and an elastic element 82 is arranged parallel to it. In this embodiment, the elastic element 82 can specifically be a tension spring. The same end of the elastic element 82 and the hydraulic damper 81, i.e., the end facing the front end of the slide rail, is connected to a reciprocating slider 83. A swingable locking element 84, such as a rocker hook, is hinged to the slider 83 via a pin. When the drawer closes to its final travel, a mating component (such as a latch or pin, not shown in the figure) installed on the moving slide rail 2 will move and lock the locking element 84, thereby causing the slider 83 to move backward together. The backward movement of slider 83 compresses hydraulic damper 81, thereby generating buffer resistance and stretching elastic element 82 to store rebound energy, achieving smooth and buffered closing of the drawer.

[0035] Specifically, to accommodate drawers of different weights, the damping mechanism in this embodiment also includes an adjustment mechanism. The other end of the elastic element 82 is connected to this adjustment mechanism for adjusting its initial extension length. This adjustment mechanism includes an adjusting gear 85 rotatably connected to the buffer base 8, and an adjusting rack 86 meshing with the adjusting gear 85. The end of the adjusting rack 86 is connected to the fixed end of the elastic element 82. When the installer needs to adjust the damping force, they only need to use a tool to rotate the adjusting gear 85, which will cause the adjusting rack 86 to produce a linear displacement, thereby changing the initial extension length of the elastic element 82. This design allows the damping effect of the slide rail to be easily fine-tuned for optimal user experience.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A synchronous concealed three-section rail, comprising a fixed rail (1) for connecting to a cabinet, a movable rail (2) for connecting to a drawer, and a linkage rail (3) disposed between the two, wherein a first movable frame (4) is provided between the fixed rail (1) and the linkage rail (3) for rolling connection, a first linkage rack (41) is fixedly mounted on the first movable frame (4), at least one second movable frame (5) is provided between the linkage rail (3) and the movable rail (2) for rolling connection, a second linkage rack (21) is fixedly mounted on the movable rail (2), and a linkage mechanism (6) is installed on the linkage rail (3) for meshing with the first linkage rack (41) and the second linkage rack (21), characterized in that, The front end of the sliding rail (2) is provided with a load-bearing device (7), which is used to provide front-end support when the drawer is closed.

2. The synchronous concealed three-section rail according to claim 1, characterized in that, The load-bearing device (7) includes a mounting bracket (71) detachably connected to the front end of the movable slide rail (2), and the mounting bracket (71) is provided with load-bearing wheels (72).

3. The synchronous concealed three-section rail according to claim 2, characterized in that, The front end of the movable slide rail (2) is provided with a mounting groove (22), and a locking hole (23) is provided on one side of the movable slide rail (2). The mounting bracket (71) is provided with a docking part (711) that matches the mounting groove (22) and a buckle (712) that matches the locking hole (23).

4. The synchronous concealed three-section rail according to any one of claims 1-3, characterized in that, The linkage mechanism (6) includes an assembly hole (31) opened on the linkage rail (3), a gear support (61) is detachably connected to the assembly hole (31), and a linkage gear (62) is rotatably connected to the gear support (61). The linkage gear (62) passes through the assembly hole (31) and meshes with the first linkage rack (41) and the second linkage rack (21) respectively.

5. The synchronous concealed three-section rail according to claim 4, characterized in that, The linkage mechanism (6) has a flange (621) on one side of the linkage gear (62), and the second linkage rack (21) has a linear guide position (211) that cooperates with the flange (621). The flange (621) and the linear guide position (211) are used to jointly limit the meshing depth of the linkage gear (62) and the first linkage rack (41) to avoid the tooth tip of the linkage gear (62) hitting the tooth root of the first linkage rack (41).

6. The synchronous concealed three-section rail according to claim 5, characterized in that, The fixed rail (1) has an L-shaped cross section and at least one sunken reinforcing rib (11) is provided at the bend.

7. The synchronous concealed three-section rail according to claim 6, characterized in that, The bends of the fixed rail (1) are rounded, and the rounded corners have a preset radius R. The preset radius R is used to disperse stress and improve the load-bearing capacity of the fixed rail (1).

8. The synchronous concealed three-section rail according to claim 6, characterized in that, Triangular reinforcing ribs (12) are provided on both sides of the sunken reinforcing rib (11).

9. The synchronous concealed three-section rail according to claim 1, characterized in that, The inner walls of the middle part of both sides of the movable slide rail (2) are provided with inwardly recessed reinforcing parts (24). Multiple balls are installed on both sides of the second movable frame (5). Multiple rollers that are rolled and connected to the bottom of the movable slide rail (2) are provided at the upper end of the second movable frame (5). The inner walls of the lower ends of both sides of the movable slide rail (2) are provided with first mating parts (25) that are rolled and connected to the outer side of the multiple balls. The outer walls of both sides of the upper part of the linkage rail (3) are provided with second mating parts (32) that are rolled and connected to the inner side of the multiple balls.

10. The synchronous concealed three-section rail according to claim 1, characterized in that, The fixed rail (1) is also provided with a buffer damping mechanism. The buffer damping mechanism includes a buffer base (8) fixedly connected to the fixed rail (1). The bottom of the buffer base (8) is provided with a hydraulic damper (81) and an elastic element (82) arranged parallel to it. The elastic element (82) and the hydraulic damper (81) are provided with a slider (83) connected to both. The slider (83) is hinged with a locking element (84) that can lock with the drawer. The other end of the elastic element (82) is connected to an adjustment mechanism for adjusting its extension length. The adjustment mechanism includes an adjustment gear (85) rotatably connected to the buffer base (8), the adjustment gear (85) meshing with an adjustment rack (86), and the adjustment rack (86) being connected to the elastic element (82).

Images