Slide rail assembly

Abstract

A slide rail assembly for a drawer, the slide rail assembly comprising: a fixed rail (1); a movable support bracket (2) slidably connected to the fixed rail (1), wherein the movable support bracket (2) is a rigid member, the movable support bracket (2) is provided with a rolling member (21), and the rolling member (21) can roll along the fixed rail (1); and a movable rail (3) slidably connected to the movable support bracket (2). When the movable rail (3) slides and extends in a first direction to a final position, the slide rail assembly is switched to an extended state, a first end (27) of the movable support bracket (2) is separated from the fixed rail (1), the first end (27) supports and is connected to the movable rail (3), a second end (28) of the movable support bracket (2) extends beyond the movable rail (3) in a second direction, the second end (28) is supported and connected to the fixed rail (1), and the second direction is opposite to the first direction.

Description

slide rail assembly

[0001] Technical Field

[0002] This application relates to the field of hardware accessories technology, and in particular to slide rail assemblies. Background Technology

[0003] Drawer slides, also known as drawer slides, linear slides, or linear guides, are grooves or ridges made of metal or other materials. They are devices that can support, fix, and guide moving devices or equipment while reducing their friction. They are mainly used for connecting drawers in wooden and steel furniture such as cabinets, furniture, filing cabinets, and bathroom cabinets, and are one of the important components of furniture.

[0004] Two-section drawer slides are widely used due to their simple structure and easy installation. A two-section drawer slide consists of a fixed rail, a movable rail, and a ball bearing holder. The fixed rail is usually installed on the side or bottom of the drawer mounting opening, serving as the foundation for the drawer's sliding path. The movable rail is the moving part of the slide, connected to the drawer body, and can slide along the fixed rail. The ball bearing holder is located between the movable and fixed rails; the balls on the holder reduce friction, making the drawer slide more smoothly.

[0005] However, the ball bearings of two-section drawer slides are made of plastic, which has a relatively poor load-bearing capacity. The load-bearing capacity of the ball bearings directly affects the length to which the sliding rail can be safely and stably pulled out. When the load increases, the contact pressure between the ball bearings and the slide rail increases, and the friction and wear also increase. If the pull-out length is too long, the ball bearings may fail due to excessive pressure, causing the sliding rail to be unable to stay stably on the track. Therefore, in two-section drawer slides, the pull-out length of the sliding rail can usually only reach about 3 / 4 of the drawer length. This means that when using the drawer, a portion of the drawer's internal space cannot be fully displayed, which will cause some inconvenience to the user.

[0006] Of course, in order to increase the pull-out length of the movable rail, there is also a three-section guide rail in the prior art. However, a three-section guide rail usually includes at least a fixed rail, a movable rail, a middle rail and a ball bearing bracket. The number of parts is large and the installation is more difficult, which will lead to excessively high production costs. Summary of the Invention

[0007] In order to overcome at least one of the defects described in the prior art, this application provides a slide rail assembly designed to improve load-bearing capacity and pull-out length while maintaining smoothness and stability of sliding and reducing production costs.

[0008] The technical solution adopted in this application to solve its problem is:

[0009] A drawer slide assembly includes: a fixed rail; a movable support frame slidably connected to the fixed rail, the movable support frame being a rigid component, and a rolling element provided on the movable support frame, the rolling element being able to roll along the fixed rail; a movable rail slidably connected to the movable support frame; when the movable rail slides out to its final position along a first direction, the drawer slide assembly switches to an extended state, a first end of the movable support frame separates from the fixed rail, the first end being supported and connected to the movable rail, and a second end of the movable support frame extends beyond the movable rail in a second direction, the second end being supported and connected to the fixed rail, the second direction being opposite to the first direction.

[0010] According to some embodiments of this application, the fixed rail has a supporting sidewall extending along the first direction, the supporting sidewall being arranged laterally, and the rolling element including a first rolling element, a second rolling element, and a third rolling element, the first rolling element being disposed at the first end, the third rolling element being disposed at the second end, and the second rolling element being disposed between the first end and the second end; when the movable rail slides back to its initial position along the second direction, the first rolling element, the second rolling element, and the third rolling element are all supported between the inner sidewall of the movable rail and the supporting sidewall; when the movable rail slides out to its final position along the first direction, the first rolling element and the supporting sidewall separate, the first rolling element is supported by the inner sidewall of the movable rail, the second rolling element is supported between the inner sidewall of the movable rail and the supporting sidewall, the third rolling element and the inner sidewall of the movable rail separate, and the third rolling element is supported by the supporting sidewall.

[0011] According to some embodiments of this application, the second rolling elements are arranged in pairs, with each pair of second rolling elements disposed vertically opposite each other between the first end and the second end.

[0012] According to some embodiments of this application, the movable rail has a first inner sidewall and a second inner sidewall, both extending along the first direction and being arranged laterally. The first inner sidewall is located above the movable support frame, and the second inner sidewall is located below the movable support frame. When the movable rail slides out to its final position along the first direction, the first rolling element is supported on the first inner sidewall and / or the second inner sidewall, the third rolling element is supported on the upper and / or lower side of the support sidewall, each pair of second rolling elements is supported on the upper and lower side of the support sidewall, and each pair of second rolling elements is also supported on the first inner sidewall and the second inner sidewall.

[0013] According to some embodiments of this application, the movable support frame includes an upper sidewall, a lower sidewall, and a connecting sidewall. The upper sidewall is located above the supporting sidewall and below the first inner sidewall, the lower sidewall is located below the supporting sidewall and above the second inner sidewall, and the connecting sidewall is disposed between the upper sidewall and the lower sidewall. The movable rail is further provided with a third inner sidewall, which is disposed between the first inner sidewall and the second inner sidewall. Each pair of first rolling elements is respectively disposed on the upper sidewall and the lower sidewall. Each pair of second rolling elements is respectively disposed on the upper sidewall and the lower sidewall. Each pair of third rolling elements is respectively disposed on the upper sidewall and the lower sidewall. The upper sidewall, the lower sidewall, and the connecting sidewall surround the supporting sidewall. The first inner sidewall, the second inner sidewall, and the third inner sidewall surround the movable support frame.

[0014] According to some embodiments of this application, the fixed rail further includes a guide sidewall extending along a first direction and vertically connected to the support sidewall. The connecting sidewall is provided with an anti-sway structure, and the two sides of the anti-sway structure abut against the guide sidewall and the third inner sidewall, respectively.

[0015] According to some embodiments of this application, the anti-sway structure is an anti-sway roller or anti-sway column wheel rotatably disposed on the connecting side wall, or an anti-sway block fixedly disposed on the connecting side wall.

[0016] According to some embodiments of this application, the rolling element has a pivot, the rolling element is rotatably connected to the movable support frame via the pivot, the pivot is arranged laterally, and the pivot is a pin.

[0017] According to some embodiments of this application, the movable support frame is made of iron.

[0018] According to some embodiments of this application, the length of the movable support frame is defined as L1, and the length of the movable rail is defined as L2. Then, L1 and L2 satisfy: L1 is less than... L2.

[0019] In summary, the slide rail assembly provided in this application has at least the following technical advantages:

[0020] On the one hand, the movable support frame is equipped with rolling elements that can roll along the fixed rail to reduce friction and wear. On the other hand, the movable support frame is a rigid component, serving as a load-bearing connection between the fixed and movable rails when the drawer is pulled out. Compared to traditional plastic ball bearing rails, it has a higher load-bearing capacity, supports longer pull-out lengths, and ensures the stability and load-bearing performance of the drawer during the pulling-out process. Importantly, when the movable rail is fully extended, the second end of the movable support frame extends beyond the movable rail and connects to the fixed rail. This support connection provides additional load-bearing support for the drawer, forming an additional support point. This support point helps to distribute and balance the weight of the entire drawer system. This design enhances the structural stability of the entire drawer assembly in its extended state. The special design of the movable support frame allows the movable rail to be pulled out safely and stably for a longer distance, almost covering the entire interior space of the drawer. This design makes the drawer less prone to wobbling or tilting during the pulling-out process, maintaining stability even when carrying heavy items. Furthermore, this design allows the drawer assembly to bear heavy loads while maintaining a small size and weight. In addition, in the extended state, the support connection between the second end of the movable support frame and the fixed rail reduces sagging or deformation of the movable rail when fully extended. This helps maintain the straightness and sliding performance of the drawer assembly, making the drawer smoother and more unobstructed when pulled out and pushed back in.

[0021] Thus, by providing stable and smooth sliding performance and high load-bearing capacity through the movable support frame, the drawer slide assembly of this embodiment can significantly improve the user experience. Users can easily pull out and push back the drawer without effort, while enjoying greater storage space and convenience. Attached Figure Description

[0022] Figure 1 is a top view of the slide rail assembly in the extended state according to Embodiment 1 of this application.

[0023] Figure 2 is a top view of the slide rail assembly in the retracted state according to Embodiment 1 of this application.

[0024] Figure 3 is a schematic diagram of the cross-sectional structure of Figure 1 in the BB direction;

[0025] Figure 4 is a magnified view of part A in Figure 3;

[0026] Figure 5 is a schematic diagram of the cross-sectional structure in the CC direction of Figure 2;

[0027] Figure 6 is an exploded structural diagram of the slide rail assembly according to Embodiment 1 of this application;

[0028] Figure 7 is a front view of the slide rail assembly according to Embodiment 1 of this application;

[0029] Figure 8 is a three-dimensional structural diagram of the movable support frame according to Embodiment 1 of this application;

[0030] Figure 9 is a front view of the movable support frame according to Embodiment 1 of this application;

[0031] Figure 10 is a front view of the slide rail assembly according to Embodiment 2 of this application;

[0032] Figure 11 is a three-dimensional structural diagram of the fixed rail according to Embodiment 2 of this application;

[0033] Figure 12 is a front view of the slide rail assembly according to Embodiment 3 of this application;

[0034] Figure 13 is a three-dimensional structural diagram of the fixed rail according to Embodiment 3 of this application;

[0035] Figure 14 is a front view of the slide rail assembly according to Embodiment 4 of this application;

[0036] Figure 15 is a three-dimensional structural diagram of the movable support frame of Embodiment 4 of this application;

[0037] Figure 16 is a three-dimensional structural diagram of the movable support frame of Embodiment 5 of this application.

[0038] The meanings of the reference numerals in the attached figures are as follows:

[0039] 1. Fixed rail; 11. Support sidewall; 12. Guide sidewall; 13. First fixed wall; 14. Second fixed wall; 2. Movable support frame; 21. Rolling element; 211. First rolling element; 212. Second rolling element; 213. Third rolling element; 22. Upper sidewall; 23. Lower sidewall; 24. Connecting sidewall; 25. Clearance opening; 26. Rotating shaft; 27. First end; 28. Second end; 29. ​​Anti-sway structure; 3. Movable rail; 31. First inner sidewall; 32. Second inner sidewall; 33. Third inner sidewall.

[0040] Embodiments of the present invention

[0041] To better understand and implement this application, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings.

[0042] In the description of this application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "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 application 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 application.

[0043] 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 application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0044] The present application will now be described in further detail with reference to the accompanying drawings.

[0045] Example 1

[0046] Please refer to Figures 1 to 9. This embodiment discloses a drawer slide assembly, including a fixed rail 1, a movable support frame 2, and a movable rail 3. The fixed rail 1 is fixed to the drawer mounting opening of a table or cabinet, serving as the track base for the drawer to slide. The movable support frame 2 is slidably connected to the fixed rail 1. The movable support frame 2 is a rigid component, and a rolling element 21 is provided on the movable support frame 2, which can roll along the fixed rail 1. The movable rail 3 is slidably connected to the movable support frame 2. The movable rail 3 is used to connect to the drawer body and can slide along the movable support frame 2.

[0047] As shown in Figures 1, 3, and 4, when the movable rail 3 slides out to its final position along the first direction, the slide rail assembly switches to the extended state. The first end 27 of the movable support frame 2 separates from the fixed rail 1, and the first end 27 is supported and connected to the movable rail 3. The second end 28 of the movable support frame 2 extends beyond the movable rail 3 in the second direction, and the second end 28 is supported and connected to the fixed rail 1. The second direction is opposite to the first direction. Specifically, the first direction can be referred to as the e1 direction in Figure 1, and the second direction can be referred to as the e2 direction in Figure 1.

[0048] The slide rail assembly provided in this embodiment has two aspects. First, a rolling element 21 is provided on the movable support frame 2, which can roll along the fixed rail 1 to reduce friction and wear. Second, the movable support frame 2 is a rigid component, which can serve as a load-bearing connection between the fixed rail 1 and the movable rail 3 when the drawer is pulled out. Compared with traditional plastic ball bearing rails, it has a higher load-bearing capacity, supports a longer pull-out length, and ensures the stability and load-bearing performance of the drawer during the pull-out process. Importantly, when the movable rail 3 is fully extended, the second end 28 of the movable support frame 2 extends beyond the movable rail 3 and connects to the fixed rail 1. The support connection between the second end 28 and the fixed rail 1 provides additional load-bearing support for the drawer, forming an additional support point. This support point helps to... The weight of the entire drawer system is distributed and balanced, thereby enhancing the structural stability of the entire slide rail assembly in the extended state. The special design of the movable support frame 2 allows the movable rail 3 to be pulled out safely and stably for a longer distance, almost covering the entire interior space of the drawer. This design makes the drawer less prone to shaking or tilting during the pulling out process, and it remains stable even when carrying heavy items. Furthermore, this design allows the slide rail assembly to bear heavy loads while maintaining a small size and weight. In addition, in the extended state, the support connection between the second end 28 of the movable support frame 2 and the fixed rail 1 can reduce the sagging or deformation of the movable rail 3 when it is fully extended. This helps to maintain the straightness and sliding performance of the slide rail assembly, making the drawer smoother and more unobstructed during the pulling out and pushing back process.

[0049] Thus, by providing stable and smooth sliding performance and high load-bearing capacity through the movable support frame 2, the drawer slide assembly of this embodiment can significantly improve the user experience. Users can easily pull out and push back the drawer without effort, while enjoying greater storage space and convenience.

[0050] As shown in Figures 2 and 5, specifically in this embodiment, when the movable rail 3 slides back to the starting position along the second direction, the slide rail assembly switches to the retracted state. The first end 27 of the movable support frame 2 is supported and connected between the fixed rail 1 and the slide rail, and the second end 28 of the movable support frame 2 is supported and connected between the fixed rail 1 and the slide rail. Thus, when the movable rail 3 retracts to the starting position, both ends of the movable support frame 2 are supported between the fixed rail 1 and the movable rail 3. This helps to enhance the stability of the slide rail assembly in the retracted state. This design can prevent the movable rail 3 from shaking or deviating from the predetermined path during the retraction process. Furthermore, by ensuring that both ends of the movable support frame 2 maintain good contact or connection with the fixed rail 1 and the movable rail 3 during the retraction process, the sliding path of the movable rail 3 can be optimized. This helps to reduce friction and wear during the sliding process, improve the durability and service life of the slide rail assembly. In this way, the stable sliding path and smooth sliding performance can significantly improve the user experience. Users can easily push the drawer back to the starting position without effort, while enjoying a smoother and quieter sliding process.

[0051] As shown in Figures 3, 4, 6 and 7, preferably, in this embodiment, the fixed rail 1 has a support sidewall 11 extending along a first direction. The support sidewall 11 is arranged laterally to provide a stable support surface for the rolling element 21. More preferably, the rolling element 21 includes a first rolling element 211, a second rolling element 212 and a third rolling element 213. The first rolling element 211 is disposed at the first end 27, the third rolling element 213 is disposed at the second end 28, and the second rolling element 212 is disposed between the first end 27 and the second end 28.

[0052] As shown in Figures 2 and 5, when the movable rail 3 slides back to its initial position along the second direction, the first rolling element 211, the second rolling element 212, and the third rolling element 213 are all supported between the inner side wall of the movable rail 3 and the supporting side wall 11. They work together to ensure the stability and smoothness of the movable rail 3 during the retraction process.

[0053] When the movable rail 3 slides out to its final position along the first direction, the first rolling element 211 separates from the supporting side wall 11 and is instead fully supported on the inner side wall of the movable rail 3. This design allows the first end 27 of the movable support frame 2 to have a certain degree of freedom relative to the fixed rail 1 in the extended state, to adapt to the extension requirements of the movable rail 3. At the same time, the second rolling element 212 remains in a supporting state between the inner side wall of the movable rail 3 and the supporting side wall 11, ensuring the stability of the movable support frame 2 during the extension process. The third rolling element 213 separates from the inner side wall of the movable rail 3 and is instead supported on the supporting side wall 11 of the fixed rail 1. This design helps to distribute the load of the movable rail 3 in the extended state and improves the load-bearing capacity of the entire slide rail assembly.

[0054] This configuration, on the one hand, by dividing the rolling element 21 into a first rolling element 211, a second rolling element 212, and a third rolling element 213, and setting them at different positions on the movable support frame 2, allows for more precise sliding control and support. This design ensures that the movable rail 3 maintains smooth sliding performance during extension and retraction, reducing friction and wear, and improving the durability of the slide rail assembly. On the other hand, in the extended state, the changing support methods of the first rolling element 211 and the third rolling element 213 help to distribute the load on the movable rail 3, increasing the load-bearing capacity of the entire slide rail assembly. This design enhances the load-bearing capacity of the slide rail assembly. It can bear heavier loads and is suitable for more diverse application scenarios. On the other hand, the second rolling element 212 remains in a supported state between the inner wall of the movable rail 3 and the support side wall 11 in both the extended and retracted states. This helps to enhance the structural stability of the movable support frame 2 and prevent it from shaking or deforming during extension or retraction. Furthermore, this design allows the slide rail assembly to adapt to drawer systems of different sizes and weights to meet diverse application needs. By adjusting the number, position, and material of the rolling elements 21, the performance of the slide rail assembly can be further optimized to adapt to specific application scenarios and load requirements.

[0055] As shown in Figures 8 and 9, specifically in this embodiment, the rolling element 21 has a pivot 26. The rolling element 21 is rotatably connected to the movable support frame 2 via the pivot 26. The pivot 26 is a connecting component between the rolling element 21 and the movable support frame 2. It allows the rolling element 21 to rotate freely during sliding, thereby reducing friction with the slide rail contact surface and improving sliding efficiency. Preferably, in this embodiment, the pivot 26 is set to be horizontal, that is, its extension direction is perpendicular to the first direction (or the sliding direction of the drawer). This horizontally set pivot 26 not only helps the rolling element 21 to remain stable during sliding, but also ensures full contact between the rolling surface and the slide rail contact surface, further improving sliding performance.

[0056] Preferably, the pivot 26 is a pin. On the one hand, as a simple and reliable connector, the pin has high strength and wear resistance, which can meet the rotational connection requirements of the rolling element 21. Furthermore, the diameter and length of the pin can be customized according to the structure of the rolling element 21 and the movable support frame 2 to ensure the stability and reliability of the connection. On the other hand, the high wear resistance of the pin can reduce the wear of the rolling element 21 during rotation and extend its service life. At the same time, as a pivot 26, the pin can also reduce fatigue damage to the movable support frame 2 during sliding, improving the durability of the entire slide rail assembly. Furthermore, as a pivot 26, the rigidity and stability of the pin can effectively prevent the rolling element 21 from loosening under vibration and impact conditions. This design allows the drawer to remain stable when subjected to external forces, avoiding noise and jamming. Moreover, as a pivot 26, the simple structure and installation method of the pin make the installation and maintenance of the rolling element 21 easier. Users can replace and maintain the rolling element 21 with simple tools (such as wrenches, screwdrivers, etc.), reducing the cost of use and the difficulty of maintenance.

[0057] Preferably, in this embodiment, the rolling element 21 can be, but is not limited to, a support roller or a support ball, etc., and can be selected according to actual needs, without being limited to a single one.

[0058] It should be noted that in some other embodiments, rivets or bushings may not be used as the pivot 26, and the choice can be made according to actual needs. No single limitation is made here.

[0059] As shown in Figures 2, 3, 8, and 9, specifically in this embodiment, the first end 27 is provided with a first opening (not labeled), the second end 28 is provided with a third opening (not labeled), and a second opening (not labeled) is provided between the first end 27 and the second end 28. One side of the first rolling element 211 can be exposed through the first opening to contact the inner wall of the movable rail 3, one side of the second rolling element 212 can be exposed through the second opening to contact the inner wall of the movable rail 3, and one side of the third rolling element 213 can be exposed through the third opening to contact the inner wall of the movable rail 3. Thus, by precisely setting the position and size of the openings, optimal contact between the rolling element 21 and the inner wall of the movable rail 3 can be ensured. This design reduces friction and wear during sliding, extends the service life of the rolling element 21 and the movable rail 3, thereby reducing maintenance costs. Furthermore, the opening design makes the structure of the movable support frame 2 simpler and clearer, reducing unnecessary complex parts. This not only reduces production costs but also improves production efficiency, because a simpler structure means fewer processing steps and a faster assembly process.

[0060] As shown in Figures 2, 3, 4, 8, and 9, more preferably, in this embodiment, the first rolling elements 211 are arranged in pairs, with each pair of first rolling elements 211 positioned vertically opposite each other at the first end 27. This design helps to provide more stable and uniform support to the first end 27 during the extension or retraction of the movable rail 3, reducing swaying or friction caused by single-point support. The third rolling elements 213 are arranged in pairs, with each pair of third rolling elements 213 positioned vertically opposite each other at the second end 28. This design allows the third rolling elements 211 to move more smoothly and evenly in the extended state. 3 can be more evenly supported on the support side wall 11 of the fixed rail 1, improving the stability of the entire movable support frame 2 during the extension process; the second rolling elements 212 are arranged in pairs, with each pair of second rolling elements 212 arranged vertically opposite each other between the first end 27 and the second end 28. This design not only helps to provide continuous support for the movable support frame 2 during the extension or retraction of the movable rail 3, but also forms good contact with the inner side wall of the movable rail 3 and the support side wall 11 of the fixed rail 1 in the extended state, further improving the load-bearing capacity and stability of the slide rail assembly.

[0061] As shown in Figures 3, 4, 7, 8, and 9, preferably, in this embodiment, the movable rail 3 has a first inner sidewall 31 and a second inner sidewall 32. Both the first inner sidewall 31 and the second inner sidewall 32 extend along a first direction and are both arranged laterally. The first inner sidewall 31 is located above the movable support frame 2, and the second inner sidewall 32 is located below the movable support frame 2. When the movable rail 3 slides out to its final position along the first direction, each pair of first rolling elements 211 is supported by the first inner sidewall 31 and the second inner sidewall 32, respectively, and each pair of second rolling elements 212 is supported by the upper and lower sides of the support sidewall 11, respectively. The second rolling element 212 is also supported on the first inner sidewall 31 and the second inner sidewall 32 respectively. This design allows the first end 27 of the movable support frame 2 to be more stably supported on the upper and lower sides of the movable rail 3 in the extended state, further improving the structural stability and load-bearing capacity of the slide rail assembly. At this time, each pair of third rolling elements 213 is also supported on the upper and lower sides of the support sidewall 11 respectively. This design not only helps to distribute the load of the movable rail 3 in the extended state, but also ensures that the third rolling element 213 and the support sidewall 11 form good contact, further improving the sliding performance and stability of the slide rail assembly.

[0062] As shown in Figures 7, 8, and 9, preferably, in this embodiment, the movable support frame 2 includes an upper sidewall 22, a lower sidewall 23, and two connecting sidewalls 24. These sidewalls together form an enclosing structure, thereby providing a more stable and robust support surface. Specifically, the upper sidewall 22 is located above the support sidewall 11 and below the first inner sidewall 31, the lower sidewall 23 is located below the support sidewall 11 and above the second inner sidewall 32, and the two connecting sidewalls 24 are disposed between the upper sidewall 22 and the lower sidewall 23, thereby forming an enclosing structure for the support sidewall 11. This design not only enhances the structural strength of the movable support frame 2 but also provides it with more uniform support.

[0063] More specifically, in this embodiment, the first opening is respectively provided on the upper sidewall 22 and the lower sidewall 23, the second opening is respectively provided on the upper sidewall 22 and the lower sidewall 23, and the third opening is respectively provided on the upper sidewall 22 and the lower sidewall 23. In addition, in terms of the configuration of the rolling elements 21, each pair of first rolling elements 211, second rolling elements 212 and third rolling elements 213 are respectively provided on the upper sidewall 22 and the lower sidewall 23 of the movable support frame 2. This design allows the rolling elements 21 to distribute the load more evenly, further improving the load-bearing capacity of the slide rail assembly.

[0064] It should be noted that in some other embodiments, the first rolling element 211 may be provided only individually at the first end 27, and the third rolling element 213 may be provided only individually at the second end 28. Specifically, the first rolling element 211 may be provided only on the upper sidewall 22, and the third rolling element 213 may be provided only on the lower sidewall 23. In this case, when the movable rail 3 slides out to its final position along the first direction, the first rolling element 211 is supported only on the first inner sidewall 31, and the third rolling element 213 is supported only on the lower side of the supporting sidewall 11. Alternatively, the first rolling element 211 may be provided only on the lower sidewall 23, and the third rolling element 213 may be provided only on the upper sidewall 22. In this case, when the movable rail 3 slides out to its final position along the first direction, the first rolling element 211 is supported only on the second inner sidewall 32, and the third rolling element 213 is supported only on the upper side of the supporting sidewall 11. The choice can be made according to actual needs, and no single limitation is made here.

[0065] More specifically, in this embodiment, one of the connecting sidewalls 24 is provided with a clearance opening 25, and the supporting sidewall 11 of the fixed rail 1 can extend from the clearance opening 25 into the space formed by the upper sidewall 22, the lower sidewall 23 and the connecting sidewall 24.

[0066] More specifically, in this embodiment, the aforementioned rotating shaft 26 is connected to the connecting sidewall 24.

[0067] Furthermore, as shown in Figures 7, 8, and 9, the movable rail 3 is also provided with two third inner sidewalls 33, which are located between the first inner sidewall 31 and the second inner sidewall 32. The first inner sidewall 31, the second inner sidewall 32, and the third inner sidewall 33 surround the movable support frame 2, echoing the surrounding structure of the movable support frame 2 and forming a more stable overall structure. In this way, the upper sidewall 22, the lower sidewall 23, and the connecting sidewall 24 of the movable support frame 2 together surround the supporting sidewall 11 of the fixed rail 1, while the first inner sidewall 31, the second inner sidewall 32, and the third inner sidewall 33 of the movable rail 3 surround the movable support frame 2. This double-surround design not only enhances the structural stability of the slide rail assembly but also provides it with higher load-bearing capacity. Importantly, due to the increased load-bearing capacity, the length of the movable support frame 2 can be shortened, making the slide rail assembly more compact and efficient, suitable for occasions with limited space.

[0068] Since the length of the movable support frame 2 can be shortened, further in this embodiment, the length of the movable support frame 2 is defined as L1, and the length of the movable rail 3 is defined as L2. Then L1 and L2 satisfy: L1 is less than L2. L2. Thus, by setting L1 to be less than or equal to... L2, the length of the movable support frame 2 is reasonably limited to avoid unnecessary material waste. Compared with a longer support frame design, this length relationship requires less material, thereby reducing material costs. In addition, it can ensure that the length of the movable support frame 2 is moderate, neither too long to occupy too much space, nor too short to affect the support stability. This length relationship helps to optimize the space utilization of the drawer slide assembly, making the overall design of the furniture more compact and reasonable.

[0069] As shown in Figures 7, 8, and 9, preferably, in this embodiment, the fixed rail 1 further includes a guide sidewall 12. The guide sidewall 12 extends along a first direction and is vertically connected to the support sidewall 11. The connecting sidewall 24 is provided with an anti-sway structure 29, with its two sides abutting against the guide sidewall 12 and the third inner sidewall 33, respectively. Thus, the anti-sway structure 29 effectively prevents the movable support frame 2 and the movable rail 3 from swaying or shaking during sliding. This design not only enhances the structural stability of the slide rail assembly but also improves its load-bearing capacity, allowing the drawer to withstand greater loads without deformation or damage. Furthermore, the addition of the guide sidewall 12 and the anti-sway structure 29 enables the movable support frame 2 to move along a more defined and stable path during sliding, which not only improves the sliding performance of the slide rail assembly but also allows users to enjoy a smoother and more stable operating experience.

[0070] Preferably, in this embodiment, the anti-sway structure 29 is an anti-sway roller rotatably mounted on the connecting sidewall 24. The anti-sway roller allows the movable support frame 2 to move along a smoother path during sliding. The rolling characteristics of the roller reduce friction and resistance during sliding, thereby improving the sliding performance and smoothness of the slide rail assembly.

[0071] Preferably, in this embodiment, the movable support frame 2 is made of iron. This has several advantages. First, the high strength of iron allows the movable support frame 2 to withstand greater weight and more complex stress conditions, thereby improving the load-bearing capacity and stability of the drawer slide assembly. This helps ensure that the drawer does not wobble or tilt during sliding, improving the overall quality and safety of the furniture. Second, iron has good wear resistance, resisting friction and wear generated during prolonged use, which helps extend the service life of the movable support frame 2, reduce maintenance costs, and enhance the user experience. Third, iron has a lower cost compared to other high-performance materials (such as stainless steel and aluminum alloys), effectively controlling the production cost of the movable support frame 2. Furthermore, the machinability and plasticity of iron improve production efficiency, further reducing production costs. These factors collectively constitute the cost-effectiveness advantage of iron in the movable support frame 2.

[0072] It should be noted that in some other embodiments, the movable support frame 2 may also be made of high-strength alloy materials or plastics, and the choice can be made according to actual needs, without making a unique limitation here.

[0073] As shown in Figure 7, specifically in this embodiment, the fixed rail 1 further includes a first fixed wall 13 and a second fixed wall 14 extending in a first direction. The first fixed wall 13 is arranged vertically, and the second fixed wall 14 is arranged horizontally. The first fixed wall 13, the second fixed wall 14, the guide side wall 12, and the support side wall 11 are connected in sequence. The support side wall 11 and the guide side wall 12 are connected to form an L-shaped structure. The support side wall 11 is turned outward relative to the first fixed wall 13.

[0074] Example 2

[0075] Please refer to Figures 10 and 11. The main difference between this embodiment and Embodiment 1 is that the supporting sidewall 11 is positioned differently relative to the first fixed wall 13. Specifically, in this embodiment, the fixed rail 1 also includes a first fixed wall 13 and a second fixed wall 14 extending in a first direction. The first fixed wall 13 is vertically arranged, and the second fixed wall 14 is horizontally arranged. The first fixed wall 13, the second fixed wall 14, the guide sidewall 12, and the supporting sidewall 11 are connected in sequence. The supporting sidewall 11 and the guide sidewall 12 are connected to form an L-shaped structure. The supporting sidewall 11 is turned inward relative to the first fixed wall 13.

[0076] Example 3

[0077] Please refer to Figures 12 and 13. The main difference between this embodiment and Embodiments 1 and 2 is that the supporting sidewall 11 and the guiding sidewall 12 are connected to form a T-shaped structure. In this way, on the one hand, the vertical part (guiding sidewall 12) and the horizontal part (supporting sidewall 11) of the T-shaped structure share the weight from the rolling element 21, making the overall structure more robust. On the other hand, the contact area between the rolling element 21 and the supporting sidewall 11 is increased, which helps to disperse the pressure applied by the rolling element 21 to the sidewall, thereby reducing the stress per unit area, helping to prevent local overload and wear, and extending the service life of the structure.

[0078] Example 4

[0079] Please refer to Figures 14 and 15. The main difference between this embodiment and Embodiments 1, 2, and 3 is that the anti-sway structure 29 is an anti-sway block fixedly installed on the connecting side wall 24. In this way, on the one hand, the anti-sway block is fixedly installed on the connecting side wall 24, which means that it will not move or deform during the sliding of the drawer, thereby ensuring a stable anti-sway effect. On the other hand, the fixed anti-sway block does not require additional motion mechanisms or complex connectors, so it can significantly reduce production costs. At the same time, since the anti-sway block is directly installed on the connecting side wall 24, the installation steps and time are reduced, further reducing manufacturing costs.

[0080] Example 5

[0081] Please refer to Figure 16. The main difference between this embodiment and Embodiments 1, 2 and 3 is that the anti-sway structure 29 is an anti-sway column wheel that is rotatably mounted on the connecting side wall 24. The anti-sway column wheel enables the movable support frame 2 to move along a smoother path during sliding. The rolling characteristics of the column wheel reduce friction and resistance during sliding, thereby improving the sliding performance and smoothness of the slide rail assembly.

[0082] In summary, the slide rail assembly disclosed in this application can bring at least the following beneficial technical effects:

[0083] 1) The movable support frame 2 is a rigid component. When the drawer is pulled out, the movable support frame 2 can serve as a load-bearing connection between the fixed rail 1 and the movable rail 3. Compared with the traditional plastic ball bearing bracket, it has a higher load-bearing capacity, supports a longer pull-out length, and ensures the stability and load-bearing performance of the drawer during the pull-out process.

[0084] 2) When the movable rail 3 is fully extended, the support connection between the second end 28 and the fixed rail 1 provides additional load-bearing support for the drawer, forming an additional support point. This support point helps to distribute and balance the weight of the entire drawer system, thereby enhancing the structural stability of the entire slide rail assembly in the extended state.

[0085] 3) In the extended state, the change in the support method of the first rolling element 211 and the third rolling element 213 helps to distribute the load of the movable rail 3 and improve the load-bearing capacity of the entire slide rail assembly. This design enables the slide rail assembly to bear heavier loads and is suitable for more diverse application scenarios.

[0086] 4) The upper sidewall 22, lower sidewall 23 and connecting sidewall 24 of the movable support frame 2 together surround the supporting sidewall 11 of the fixed rail 1, while the first inner sidewall 31, second inner sidewall 32 and third inner sidewall 33 of the movable rail 3 surround the movable support frame 2. This double-surround design not only enhances the structural stability of the slide rail assembly, but also provides it with higher load-bearing capacity.

[0087] The technical means disclosed in this application are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. Drawer slide assembly, for drawers, including: Fixed rail (1); The movable support frame (2) is slidably connected to the fixed rail (1). The movable support frame (2) is a rigid component. A rolling component (21) is provided on the movable support frame (2). The rolling component (21) can roll along the fixed rail (1). The movable rail (3) is slidably connected to the movable support frame (2); When the movable rail (3) slides out to its final position along the first direction, the slide rail assembly switches to the extended state, the first end (27) of the movable support frame (2) separates from the fixed rail (1), the first end (27) is supported and connected to the movable rail (3), the second end (28) of the movable support frame (2) extends beyond the movable rail (3) in the second direction, the second end (28) is supported and connected to the fixed rail (1), and the second direction is opposite to the first direction.

2. The slide rail assembly according to claim 1, wherein, The fixed rail (1) has a support sidewall (11) extending along the first direction. The support sidewall (11) is arranged laterally. The rolling element (21) includes a first rolling element (211), a second rolling element (212), and a third rolling element (213). The first rolling element (211) is disposed at the first end (27), the third rolling element (213) is disposed at the second end (28), and the second rolling element (212) is disposed between the first end (27) and the second end (28). When the movable rail (3) slides back to its initial position along the second direction, the first rolling element (211), the second rolling element (212) and the third rolling element (213) are all supported between the inner sidewall of the movable rail (3) and the supporting sidewall (11); When the movable rail (3) slides out to its final position along the first direction, the first rolling element (211) and the supporting side wall (11) separate, the first rolling element (211) is supported on the inner side wall of the movable rail (3), the second rolling element (212) is supported between the inner side wall of the movable rail (3) and the supporting side wall (11), the third rolling element (213) and the inner side wall of the movable rail (3) separate, and the third rolling element (213) is supported on the supporting side wall (11).

3. The slide rail assembly according to claim 2, wherein, The rolling element (21) has a pivot (26), and the rolling element (21) is rotatably connected to the movable support frame (2) through the pivot (26). The pivot (26) is arranged horizontally and is a pin.

4. The slide rail assembly according to claim 2, wherein, The second rolling element (212) is arranged in pairs, with each pair of second rolling elements (212) arranged vertically opposite each other between the first end (27) and the second end (28).

5. The slide rail assembly according to claim 4, wherein, The movable rail (3) has a first inner sidewall (31) and a second inner sidewall (32). The first inner sidewall (31) and the second inner sidewall (32) both extend along the first direction and are both arranged laterally. The first inner sidewall (31) is located above the movable support frame (2), and the second inner sidewall (32) is located below the movable support frame (2). When the movable rail (3) slides out to its final position along the first direction, the first rolling element (211) is supported on the first inner sidewall (31) and / or the second inner sidewall (32), the third rolling element (213) is supported on the upper and / or lower side of the supporting sidewall (11), each pair of second rolling elements (212) is supported on the upper and lower side of the supporting sidewall (11), and each pair of second rolling elements (212) is also supported on the first inner sidewall (31) and the second inner sidewall (32).

6. The slide rail assembly according to claim 5, wherein, The movable support frame (2) includes an upper sidewall (22), a lower sidewall (23), and a connecting sidewall (24). The upper sidewall (22) is located above the supporting sidewall (11) and below the first inner sidewall (31). The lower sidewall (23) is located below the supporting sidewall (11) and above the second inner sidewall (32). The connecting sidewall (24) is located between the upper sidewall (22) and the lower sidewall (23). The movable rail (3) is also provided with a third inner sidewall (33), which is located between the first inner sidewall (31) and the second inner sidewall (32). Each pair of second rolling elements (212) is respectively disposed on the upper sidewall (22) and the lower sidewall (23); the upper sidewall (22), the lower sidewall (23) and the connecting sidewall (24) surround the supporting sidewall (11); the first inner sidewall (31), the second inner sidewall (32) and the third inner sidewall (33) surround the movable support frame (2).

7. The slide rail assembly according to claim 6, wherein, The fixed rail (1) also includes a guide sidewall (12), which extends along a first direction and is vertically connected to the support sidewall (11). The connecting sidewall (24) is provided with an anti-sway structure (29), and the two sides of the anti-sway structure (29) abut against the guide sidewall (12) and the third inner sidewall (33), respectively.

8. The slide rail assembly according to claim 7, wherein, The anti-sway structure (29) is an anti-sway roller or anti-sway column wheel rotatably disposed on the connecting side wall (24) or an anti-sway block fixedly disposed on the connecting side wall (24).

9. The slide rail assembly according to claim 1, wherein, The movable support frame (2) is made of iron.

10. The slide rail assembly according to any one of claims 1-9, wherein the length of the movable support frame (2) is defined as L1, and the length of the movable rail (3) is defined as L2, then L1 and L2 satisfy: L1 is less than L2.

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