External rack three-section hidden rail six-link slide rail and drawer

Abstract

The application provides a kind of external rack three-section hidden rail six linkage slide rail and drawer, including the upper rail one side wall on which is installed upper rack;The side wall of middle rail is rotatably installed with multiple-tooth gear, and the top of middle rail is provided with upper ball holder, and the bottom of one side of upper ball holder is provided with first ball holder rack, and multiple-tooth gear is respectively engaged with upper rack and ball holder rack;Lower rail is installed with lower rack on outer wall, and lower rail is provided with lower ball holder on inner wall, and the top of one side of lower ball holder is provided with second ball holder rack, and lower rack and second ball holder rack are respectively engaged with multiple-tooth gear.The application;The whole slide rail can realize six synchronous movement, reduce the shaking and jamming phenomenon of slide rail in the process of drawing, make the whole structure more stable, prolong the service life of slide rail;And make the slide rail drawing more smooth, can effectively ensure the drawer return.

Description

Technical Field

[0001] This invention relates to the field of drawer slide technology, and in particular to an external rack, three-section concealed slide rail, six-linkage slide rail and drawer. Background Technology

[0002] In existing three-section concealed drawer slide structures, the drawer slides are typically pulled out by a gear in the middle rail driving the upper and lower racks. Since the gear only drives the racks, the linkage between the upper, middle, and lower rails relies mainly on the friction between the rails and the racks. During operation, the synchronization of the upper and lower rails needs improvement. This traditional structure suffers from insufficient linkage; the coordinated movement between the upper, middle, and lower rails and the gears and racks is not tight enough. During the drawer slides out, the racks are prone to slipping, causing the drawer to fail to close properly, affecting the user experience. Furthermore, the structural stability needs improvement. With the furniture industry's increasing demands for hardware performance, a new three-section concealed drawer slide structure with a beaded rack and gear combination is needed, which can achieve tighter linkage, improve structural stability, and enhance smooth operation.

[0003] In existing technologies, the sliding action of the drawer is usually achieved by using a gear in the middle rail to drive the upper and lower racks. Since the gear only drives the upper and lower racks, the linkage between the upper, middle, and lower rails mainly relies on the friction between the upper and lower rails and the racks. During the movement, the synchronicity of the movement of the upper and lower rails needs to be improved. This traditional structure has the problem of insufficient linkage. The coordinated movement between the upper, middle, and lower rails and the gears and racks is not tight enough, and the upper and lower ball bearings cannot be linked at the same time, which leads to the drawer not being able to slide smoothly and tightly. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide an external rack, three-section concealed rail, six-linkage drawer and drawer, to solve the problem in the prior art where the upper rail, middle rail, lower rail, upper bead holder, and lower bead holder cannot be linked simultaneously, resulting in the drawer not pulling out smoothly.

[0005] In a first aspect, the present invention provides an external rack, three-section concealed rail, and six-linkage slide rail, comprising: The upper rail has an upper rack installed on one side wall; A middle rail, on which a multi-toothed gear is rotatably mounted, and an upper bead holder is provided at the top of the middle rail, and a first bead holder rack is provided at the bottom of one side of the upper bead holder, and the multi-toothed gear meshes with the upper rack and the bead holder rack respectively; The lower rail has a lower rack installed on its outer wall and a lower ball holder on its inner wall. A second ball holder rack is provided on the top of one side of the lower ball holder. The lower rack and the second ball holder rack mesh with the multi-tooth gear. The moving middle rail drives the multi-toothed gear, which in turn drives the upper rail, the lower rail, the upper ball cage, and the lower ball cage via the meshing lower and upper racks.

[0006] Furthermore, the multi-tooth gear includes a gear shaft, a first gear, and a second gear. The gear shaft is mounted on the side wall of the middle rail. The first gear and the second gear are both disposed on the gear shaft. The second gear meshes with the upper rack and the lower rack, respectively.

[0007] Furthermore, the first gear has a first meshing tooth on one end of its outer wall, and the second gear has a second meshing tooth on one end of its outer wall. The first meshing tooth and the second meshing tooth are staggered and mesh with the first bead carrier rack and the second bead carrier rack, respectively.

[0008] Furthermore, the bottom of the upper rail is provided with an upper opening, the top of the lower rail is provided with a lower opening, and the top and bottom of the middle rail pass through the upper opening and the lower opening respectively, and are respectively disposed inside the upper rail and the lower rail.

[0009] Furthermore, both the upper bead holder and the lower bead holder are U-shaped structures. The two sides of the upper bead holder are respectively located on the upper end of the middle rail, and the two sides of the lower bead holder are respectively located on the lower end of the middle rail. A number of steel balls are evenly embedded on the upper surface of the upper bead holder and the lower surface of the lower bead holder.

[0010] Furthermore, a welding plate is welded to the bottom outer wall of the upper rail, and the welding plate is connected to a buffer assembly.

[0011] Furthermore, the buffer assembly includes a hook, a damper, and a tension spring. The welding piece is snapped onto the hook, and one end of the hook is connected to the damper and the tension spring respectively. The damper is located above the tension spring. A buffer frame is connected to the outer wall of the lower rail. The hook, the damper, and the tension spring are all disposed within the buffer frame. One end of the tension spring is fixed to the inner wall of the buffer frame, and one end of the damper is fixed to the inner wall of the buffer.

[0012] Furthermore, the bottom of the buffer is provided with multiple sets of supports.

[0013] Furthermore, the upper rail's sidewall is connected to the upper rack via an upper buckle, and the lower rail's sidewall is connected to the lower rack via a lower buckle.

[0014] Secondly, the present invention also provides a drawer, including the aforementioned external rack, three-section concealed rail, and six-linkage slide rail.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The middle rail drives the multi-tooth gear, which in turn drives the upper rail, lower rail, upper ball bearing, and lower ball bearing respectively via the upper and lower racks meshing with it. This allows the upper rail, middle rail, lower rail, upper ball bearing, and lower ball bearing to move synchronously during the pulling process, solving the problems of insufficient linkage and failure to return to the original position after multiple pulls in the existing structure, and improving the overall coordination of the slide rail. 2. The upper rail, middle rail, lower rail, upper bead holder, and lower bead holder move synchronously during the pulling process, and the multi-tooth gear can also move at the same time, so that the entire slide rail can achieve synchronous movement of the six components, thereby making the overall structure more stable. 3. The entire drawer slide can move synchronously in six directions, reducing wobbling and jamming during the pulling process, making the whole structure more stable and extending the service life of the slide; it also makes the drawer slide smoother, effectively ensuring the drawer returns to its original position, and improving the user experience of furniture drawer slides. 4. The welding plates and buffer components on the upper rail provide cushioning for the entire structure during the pulling process, protecting the entire structure and thus further extending its service life. It also avoids noise and improves the user experience. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the external rack, three-section hidden rail, and six-linkage slide rail in an embodiment of the present invention. Figure 1 ; Figure 2 This is a front view of the external rack, three-section hidden rail, and six-linkage slide rail in an embodiment of the present invention. Figure 3 This is a three-dimensional structural diagram of the external rack, three-section hidden rail, and six-linkage slide rail in an embodiment of the present invention. Figure 2 ; Figure 4 This is a three-dimensional structural diagram of the external rack, three-section hidden rail, and six-linkage slide rail in an embodiment of the present invention. Figure 3 ; Figure 5 This is a three-dimensional structural diagram of the external rack, three-section hidden rail, and six-linkage slide rail in an embodiment of the present invention. Figure 4 ; Figure 6 This is a schematic diagram of the structure of the middle rail, upper ball bearing, lower ball bearing, and multi-tooth gear of the external rack, three-section concealed rail, and six-linkage slide rail in this embodiment of the invention. Figure 1 ; Figure 7 This is a three-dimensional structural diagram of the external rack, three-section hidden rail, and six-linkage slide rail in an embodiment of the present invention. Figure 5 ; Figure 8 for Figure 7Enlarged view of a portion of point A in the middle; Figure 9 This is a schematic diagram of the structure of the middle rail, upper ball bearing, lower ball bearing, and multi-tooth gear of the external rack, three-section concealed rail, and six-linkage slide rail in this embodiment of the invention. Figure 2 ; Figure 10 This is a schematic diagram of the structure of the multi-tooth gear of the external rack, three-section hidden rail, and six-linkage slide rail in an embodiment of the present invention. Figure 1 ; Figure 11 This is a schematic diagram of the structure of the multi-tooth gear of the external rack, three-section hidden rail, and six-linkage slide rail in an embodiment of the present invention. Figure 2 ; Figure 12 This is a schematic diagram of the structure of the multi-tooth gear of the external rack, three-section hidden rail, and six-linkage slide rail in an embodiment of the present invention. Figure 3 ; Figure 13 This is a schematic diagram of the middle rail, upper ball bearing, and lower ball bearing of the external rack, three-section concealed rail, and six-linkage slide rail in an embodiment of the present invention.

[0017] Explanation of key component symbols: 10. Upper rail; 11. Upper rack; 13. Upper buckle; 14. Upper opening; 20. Middle rail; 21. Multi-tooth gear; 22. First gear; 220. First meshing tooth; 23. Second gear; 230. Second meshing tooth; 24. Gear shaft; 30. Lower rail; 31. Lower rack; 33. Lower buckle; 34. Lower opening; 40. Buffer; 41. Support; 50. Install the bead holder; 51. First bead holder rack; 60. Lower bead holder; 61. Second bead holder rack; 70. Welding sheet; 71. Hook; 72. Damper; 73. Tension spring; 80. Steel balls.

[0018] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Please see Figures 1 to 13 The image shows an external rack, a three-section hidden rail, and a six-linkage slide rail in an embodiment of the present invention, including an upper rail 10, a middle rail 20, and a lower rail 30.

[0023] An upper rack 11 is installed on one side wall of the upper rail 10. A multi-tooth gear is rotatably installed on the side wall of the middle rail 20. An upper bead holder 50 is provided on the top of the middle rail 20. A first bead holder rack 51 is provided on the bottom side of the upper bead holder 50. The multi-tooth gear meshes with the upper rack 11 and the bead holder rack respectively. A lower rack 31 is installed on the outer wall of the lower rail 30. A lower bead holder 60 is provided on the inner wall of the lower rail 30. A second bead holder rack 61 is provided on the top side of the lower bead holder 60. The lower rack 31 and the second bead holder rack 61 mesh with the multi-tooth gear respectively. Moving the middle rail 20 drives the multi-tooth gear 21, and through the multi-tooth gear 21, through the meshing upper rack 11 and lower rack 31, drives the upper rail 10, the lower rail 30, the upper bead holder 50, and the lower bead holder 60 respectively.

[0024] It is understandable that when the middle rail 20 moves, it drives the multi-tooth gear 21. The multi-tooth gear 21 drives the upper rail 10 and the lower rail 30 through the upper rack 11 that meshes with it. The multi-tooth gear 21 also meshes with the upper rack 11 on the side wall of the upper rail 10 and the lower rack 31 on the side wall of the lower rail 30. Thus, the upper rack 11 drives the upper rail 10 and the lower rack 31 drives the lower rail 30, thereby effectively improving the stability during the pull-out process. In addition, the multi-tooth gear 21 can also drive the upper ball holder 50 and the lower ball holder 60, thereby realizing the joint movement of the upper rail 10, middle rail 20, lower rail 30, upper ball holder 50 and lower ball holder 60. This achieves six-way linkage of the upper rail 10, middle rail 20, lower rail 30, upper ball holder 50, lower ball holder 60 and the multi-tooth gear 21 on the side wall of the middle rail 20, thereby effectively improving the stability of the entire structure and the smoothness of the pull-out process.

[0025] Specifically, in this embodiment, the multi-tooth gear 21 includes a gear shaft 24, a first gear 22, and a second gear 23. The gear shaft 24 is mounted on the side wall of the middle rail 20. The first gear 22 and the second gear 23 are both disposed on the gear shaft 24. The second gear 23 meshes with the upper rack 11 and the lower rack 31, respectively. A first meshing tooth 220 is provided on the outer wall of one end of the first gear 22, and a second meshing tooth 230 is provided on the outer wall of one end of the second gear 23. The first meshing tooth 220 and the second meshing tooth 230 are staggered and mesh with the first bead cage rack 51 and the second bead cage rack 61, respectively.

[0026] It should be noted that when the middle rail 20 drives the gear shaft 24 to move, the first gear 22 and the second gear 23 move simultaneously. The first gear 22 drives the lower rack 31 on the side wall of the lower rail 30, and the second gear 23 drives the upper rack 11 on the side wall of the upper rail 10 and the lower rack 31 on the side wall of the lower rail 30. The tops of the interleaved first meshing teeth 220 and the second meshing teeth 230 mesh with the first bead rack 51 and the bottoms mesh with the second bead rack 61, thereby driving the upper bead rack 50 and the lower bead rack 60 to move, thus achieving a linkage effect.

[0027] Specifically, in this embodiment, the upper rail 10 has an upper opening 14 at its bottom, and the lower rail 30 has a lower opening 34 at its top. The top and bottom of the middle rail 20 pass through the upper opening 14 and the lower opening 34, respectively, and are respectively disposed inside the upper rail 10 and the lower rail 30. The upper bead holder 50 and the lower bead holder 60 are both U-shaped structures. The two sides of the upper bead holder 50 are respectively disposed on the upper ends of the middle rail 20, and the two sides of the lower bead holder 60 are respectively disposed on the lower ends of the middle rail 20. A plurality of steel balls 80 are evenly embedded on the upper surface of the upper bead holder 50 and the lower surface of the lower bead holder 60. With this arrangement, the upper rail 10, middle rail 20, lower rail 30, upper bead holder 50, and lower bead holder 60, which are used for linkage stability, can be accommodated simultaneously in a compact space. In addition, steel balls 80 are embedded in the upper bead frame 50 and the lower bead frame 60. When the upper rail 10 and the lower rail 30 move, the steel balls roll and drive the upper bead frame 50 and the lower bead frame 60, so that the steel balls 80 can make the upper bead frame 50 and the lower bead frame 60 move more smoothly.

[0028] Furthermore, in this embodiment, a welding piece 70 is welded to the bottom outer wall of the upper rail 10. The welding piece 70 is connected to a buffer assembly. The buffer assembly includes a hook 71, a damper 72, and a tension spring. The welding piece 70 is snapped onto the hook 71. One end of the hook 71 is connected to the damper 72 and the tension spring, respectively. The damper 72 is located above the tension spring. A buffer frame is connected to the outer wall of the lower rail 30. The hook 71, the damper 72, and the tension spring are all disposed within the buffer frame. One end of the tension spring is fixed to the inner wall of the buffer frame, and one end of the damper 72 is fixed to the inner wall of the buffer.

[0029] It should be noted that when the upper rail 10 moves, it drives the welding piece 70. The welding piece 70 then transmits the force to the damper 72 and the tension spring through the hook 71. This allows the damper 72 and the tension spring to transmit the buffering torque to the welding piece 70 through the hook 71, and then to the upper rail 10 through the welding piece 70, thereby achieving the buffering effect.

[0030] Furthermore, in this embodiment, the bottom of the buffer 40 is provided with multiple sets of brackets 41. In this embodiment, there are two sets of brackets 41, which are symmetrically installed at the bottom of the buffer 40, and one end of each set extends and connects to the bottom of the lower rail 30, so that the entire structure can be installed using the brackets 41.

[0031] Specifically, in this embodiment, the upper rail 10 is connected to the upper rack 11 via an upper buckle 13, and the lower rail 30 is connected to the lower rack 31 via a lower buckle 33. The upper rail 10 is connected to the upper rack 11 via the upper buckle 13 so that the upper rack 11 can be stably installed on the side wall of the upper rail 10, and the lower rail 30 is connected to the lower rack 31 via the lower buckle 33 so that the lower rack 31 can be stably installed on the side wall of the lower rail 30.

[0032] The present invention also proposes a drawer, including the aforementioned external rack, three-section concealed rail, and six-linkage slide rail.

[0033] In summary, the external rack and pinion three-section concealed six-linkage slide rail and drawer of the above embodiments of the present invention, wherein the middle rail 20 drives the multi-tooth gear 21, and the multi-tooth gear 21, through the meshing upper rack 11 and lower rack 31, respectively drives the upper rail 10, lower rail 30, upper ball bearing 50 and lower ball bearing 60, thereby enabling the upper rail 10, middle rail 20, lower rail 30, upper ball bearing 50 and lower ball bearing 60 to move synchronously during the drawer operation, solving the problems of insufficient linkage and failure to return to the original position after multiple drawers in the existing structure, and improving the overall coordination of the slide rail; the upper rail 10, middle rail 20, lower rail 30, upper ball bearing 50 and lower ball bearing 60 move synchronously during the drawer operation. The movement of the slide rail, along with the simultaneous movement of the multi-toothed gear 21, allows all six components to move synchronously, resulting in greater structural stability. This synchronous movement reduces wobbling and jamming during drawer operation, enhancing structural stability and extending the slide rail's lifespan. It also ensures smoother drawer operation, effectively guaranteeing drawer return to its original position and improving the user experience. Furthermore, the welding plates 70 and buffer components on the upper rail 10 provide cushioning during drawer operation, protecting the entire structure and further extending its lifespan. Additionally, it reduces noise and enhances the user experience.

[0034] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "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 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.

[0035] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A three-section concealed slide rail with external rack and pinion, characterized in that, include: The upper rail has an upper rack installed on one side wall; A middle rail, on which a multi-toothed gear is rotatably mounted, and an upper bead holder is provided at the top of the middle rail, and a first bead holder rack is provided at the bottom of one side of the upper bead holder, and the multi-toothed gear meshes with the upper rack and the bead holder rack respectively; The lower rail has a lower rack installed on its outer wall and a lower ball holder on its inner wall. A second ball holder rack is provided on the top of one side of the lower ball holder. The lower rack and the second ball holder rack mesh with the multi-tooth gear. The moving middle rail drives the multi-toothed gear, which in turn drives the upper rail, the lower rail, the upper ball cage, and the lower ball cage via the meshing lower and upper racks.

2. The external rack, three-section concealed rail, six-linkage slide rail according to claim 1, is characterized in that, The multi-tooth gear includes a gear shaft, a first gear, and a second gear. The gear shaft is mounted on the side wall of the middle rail. The first gear and the second gear are both mounted on the gear shaft. The second gear meshes with the upper rack and the lower rack, respectively.

3. The external rack, three-section concealed rail, six-linkage slide rail according to claim 2, is characterized in that, The first gear has a first meshing tooth on one end of its outer wall, and the second gear has a second meshing tooth on one end of its outer wall. The first meshing tooth and the second meshing tooth are staggered and mesh with the first bead carrier rack and the second bead carrier rack, respectively.

4. The external rack, three-section concealed rail, six-linkage slide rail according to claim 1, is characterized in that, The upper rail has an upper opening at its bottom, and the lower rail has a lower opening at its top. The top and bottom of the middle rail pass through the upper opening and the lower opening, respectively, and are respectively located inside the upper rail and the lower rail.

5. The external rack, three-section concealed rail, six-linkage slide rail according to claim 1, characterized in that, Both the upper bead holder and the lower bead holder have a U-shaped structure. The two sides of the upper bead holder are respectively located on the upper end of the middle rail, and the two sides of the lower bead holder are respectively located on the lower end of the middle rail. A number of steel balls are evenly embedded on the upper surface of the upper bead holder and the lower surface of the lower bead holder.

6. The external rack, three-section concealed rail, six-linkage slide rail according to claim 1, is characterized in that, The bottom outer wall of the upper rail is welded with a welding plate, and the welding plate is connected to a buffer assembly.

7. The external rack, three-section concealed rail, six-linkage slide rail according to claim 6, is characterized in that, The buffer assembly includes a hook, a damper, and a tension spring. The welding piece is snapped onto the hook, and one end of the hook is connected to the damper and the tension spring respectively. The damper is located above the tension spring. A buffer frame is connected to the outer wall of the lower rail. The hook, the damper, and the tension spring are all disposed inside the buffer frame. One end of the tension spring is fixed to the inner wall of the buffer frame, and one end of the damper is fixed to the inner wall of the buffer.

8. The external rack, three-section concealed rail, six-linkage slide rail according to claim 7, is characterized in that, The bottom of the buffer is equipped with multiple sets of supports.

9. The external rack, three-section concealed rail, six-linkage slide rail according to claim 1, characterized in that, The upper rail is connected to the upper rack via an upper buckle, and the lower rail is connected to the lower rack via a lower buckle.

10. A drawer, characterized in that, Includes the external rack, three-section concealed rail, and six-linkage slide rail as described in any one of claims 1 to 9.

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