Slide rail assembly

Abstract

The invention discloses a slide rail assembly, which is used for a drawer and comprises a fixed rail, a sliding rail and a sliding rail, the movable supporting frame is connected to the fixed rail in a sliding mode, the movable supporting frame is a rigid piece, a rolling piece is arranged on the movable supporting frame, and the rolling piece can roll along the fixed rail; the movable rail is slidably connected to the movable supporting frame; when the movable rail slides and extends out to the final position in the first direction, the sliding rail assembly is switched to the stretching state, the first end of the movable supporting frame is separated from the fixed rail, the first end is connected to the movable rail in a supporting mode, the second end of the movable supporting frame exceeds the movable rail in the second direction, and the second end is connected to the fixed rail in a supporting mode. The second direction is opposite to the first direction. Thus, the movable supporting frame can play a role in bearing connection between the fixed rail and the movable rail when the drawer is pulled out, and compared with a traditional plastic sliding ball frame, the movable supporting frame has higher bearing capacity and supports longer pull-out length, and the stability and bearing performance of the drawer in the pull-out process are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of hardware accessories, in particular to a slide rail assembly. Background Art

[0002] Drawer guides, also known as slides, linear guides, and linear slides, are grooves or ridges made of metal or other materials that can bear, fix, guide moving devices or equipment and reduce their friction. They are mainly used for drawer connections of cabinets, furniture, document cabinets, bathroom cabinets and other wooden and steel drawers. They are one of the important components of furniture.

[0003] There is a two-section guide rail in the drawer guide rail, which is widely used due to its simple structure and easy installation. The two-section guide rail includes a fixed rail, a movable rail and a sliding bead rack; the fixed rail is usually installed on the side or bottom of the drawer installation port, and it serves as the track basis for the drawer to slide; the movable rail is the moving part of the guide rail, which is connected to the drawer body and can slide along the fixed rail; the sliding bead rack is arranged between the movable rail and the fixed rail, and the sliding beads on the sliding bead rack can reduce friction and make the drawer slide more smoothly.

[0004] However, the bead frame of the two-section guide rail is made of plastic and has poor load-bearing capacity. The load-bearing capacity of the bead frame directly affects the length to which the movable rail can be safely and stably pulled out. When the load increases, the contact pressure between the bead frame and the slide rail increases, and the friction and wear also increase accordingly. If the pull-out length is too long, the bead frame may fail due to excessive pressure, resulting in the movable rail being unable to remain stably on the track. Therefore, in the two-section guide rail, the pull-out length of the movable rail can usually only reach about 3 / 4 of the drawer length, which means that when the drawer is in use, a part of the drawer's internal space cannot be fully displayed, which will bring certain inconveniences to the user.

[0005] 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, the three-section guide rail usually includes at least a fixed rail, a movable rail, a middle rail and a sliding bead frame, has a large number of parts and is difficult to install, which will bring about the problem of excessively high production costs. Summary of the invention

[0006] In order to overcome at least one of the defects of the prior art described above, the present invention provides a slide rail assembly, which aims to improve the load-bearing capacity and the pull-out length, while maintaining the smoothness and stability of sliding and reducing the production cost.

[0007] The technical solution adopted by the present invention to solve the problem is:

[0008] A slide rail assembly, used for a drawer, comprises: a fixed rail; a movable support frame, slidably connected to the fixed rail, the movable support frame is a rigid member, and a rolling member is provided on the movable support frame, and the rolling member can roll along the fixed rail; a movable rail, slidably connected to the movable support frame; when the movable rail slides and extends to a final position along a first direction, the slide rail assembly switches to an extended state, the first end of the movable support frame is separated from the fixed rail, the first end is supported and connected to the movable rail, the second end of the movable support frame exceeds the movable rail in a second direction, the second end is supported and connected to the fixed rail, and the second direction is opposite to the first direction.

[0009] According to some embodiments of the present invention, the fixed rail has a supporting side wall extending along the first direction, the supporting side wall is arranged laterally, and the rolling member includes a first rolling member, a second rolling member and a third rolling member, the first rolling member is arranged at the first end, the third rolling member is arranged at the second end, and the second rolling member is arranged between the first end and the second end; when the movable rail slides and retracts to an initial position along the second direction, the first rolling member, the second rolling member and the third rolling member are all supported between the inner side wall of the movable rail and the supporting side wall; when the movable rail slides and extends to a final position along the first direction, the first rolling member and the supporting side wall are separated, the first rolling member is supported on the inner side wall of the movable rail, the second rolling member is supported between the inner side wall of the movable rail and the supporting side wall, the third rolling member is separated from the inner side wall of the movable rail, and the third rolling member is supported on the supporting side wall.

[0010] According to some embodiments of the present invention, the second rolling elements are arranged in pairs, and each pair of the second rolling elements is arranged vertically and relatively between the first end portion and the second end portion.

[0011] According to some embodiments of the present invention, the movable rail has a first inner side wall and a second inner side wall, both of which extend along the first direction and are laterally arranged, the first inner side wall is located above the movable support frame, and the second inner side wall is located below the movable support frame; when the movable rail slides out along the first direction to a final position, the first rolling element is supported on the first inner side wall and / or the second inner side wall, the third rolling element is supported on the upper side and / or the lower side of the supporting side wall, each pair of the second rolling elements is respectively supported on the upper side and the lower side of the supporting side wall, and each pair of the second rolling elements is also respectively supported on the first inner side wall and the second inner side wall.

[0012] According to some embodiments of the present invention, the movable support frame includes an upper side wall, a lower side wall and a connecting side wall, the upper side wall is located above the supporting side wall and below the first inner side wall, the lower side wall is located below the supporting side wall and above the second inner side wall, and the connecting side wall is arranged between the upper side wall and the lower side wall; the movable rail is also provided with a third inner side wall, and the third inner side wall is arranged between the first inner side wall and the second inner side wall; each pair of the first rolling members is respectively arranged on the upper side wall and the lower side wall; each pair of the second rolling members is respectively arranged on the upper side wall and the lower side wall; each pair of the third rolling members is respectively arranged on the upper side wall and the lower side wall; the upper side wall, the lower side wall and the connecting side wall surround the supporting side wall; the first inner side wall, the second inner side wall and the third inner side wall surround the movable support frame.

[0013] According to some embodiments of the present invention, the fixed rail also includes a guide side wall, which extends along a first direction and is vertically connected to the supporting side wall. The connecting side wall is provided with an anti-sway structure, and two sides of the anti-sway structure are respectively abutted against the guide side wall and the third inner side wall.

[0014] According to some embodiments of the present invention, the anti-sway structure is an anti-sway roller rotatably disposed on the connecting side wall or an anti-sway block fixedly disposed on the connecting side wall.

[0015] According to some embodiments of the present invention, the rolling element has a rotating shaft, and the rolling element is rotatably connected to the movable support frame via the rotating shaft. The rotating shaft is arranged transversely and is a pin.

[0016] According to some embodiments of the present invention, the movable support frame is made of iron material.

[0017] According to some embodiments of the present invention, 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

[0018] In summary, the slide rail assembly provided by the present invention has at least the following technical effects:

[0019] On the one hand, a rolling member is provided on the movable support frame, and the rolling member can roll along the fixed rail to reduce friction and wear. On the other hand, the movable support frame is a rigid member, and can play the role of load-bearing connection between the fixed rail and the movable rail when the drawer is pulled out. Compared with the traditional plastic sliding bead frame, the movable support frame has a higher load-bearing capacity and supports a longer pull-out length, ensuring the stability and load-bearing performance of the drawer during the pulling-out process. Moreover, importantly, when the movable rail is fully extended, the second end of the movable support frame exceeds the movable rail and is connected to the fixed rail. The supporting connection between the second end and the fixed rail provides additional load-bearing support for the drawer, forming an additional support point, which helps to disperse and balance the weight of the entire drawer system. , thereby enhancing the structural stability of the entire slide rail assembly in the extended state. The special design of the movable support frame enables the movable rail to be safely and stably pulled out for a longer distance, almost covering the entire internal space of the drawer. This design makes the drawer less likely to shake or tilt during the pulling-out process, and it can remain stable even when carrying heavier items. Moreover, this design allows the slide rail assembly to carry heavier loads while maintaining a smaller volume and weight. In addition, in the extended state, the supporting connection between the second end of the movable support frame and the fixed rail can reduce the sagging or deformation of the movable rail when it is fully extended, which 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 processes.

[0020] In this way, by providing stable, smooth sliding performance and high load-bearing capacity through the movable support frame, the slide rail assembly for the drawer of this embodiment can significantly improve the user experience. The user can easily pull out and push back the drawer without any effort, while enjoying larger storage space and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the top view of the structure of the slide rail assembly in the extended state according to the first embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the top view of the structure of the slide rail assembly in the first embodiment of the present invention when it is in a retracted state;

[0023] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure in the BB direction;

[0024] Figure 4 for Figure 3 A partial enlarged view of the middle A part;

[0025] Figure 5 for Figure 2 Schematic diagram of the cross-sectional structure in the CC direction;

[0026] Figure 6This is a schematic diagram of the exploded structure of the slide rail assembly according to the first embodiment of the present invention;

[0027] Figure 7 It is a front view structural schematic diagram of the slide rail assembly according to the first embodiment of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the movable support frame of the first embodiment of the present invention;

[0029] Fig. 9 It is a front view structural schematic diagram of the movable support frame of the first embodiment of the present invention;

[0030] Fig.10 It is a front view structural schematic diagram of the slide rail assembly according to the second embodiment of the present invention;

[0031] Fig.11 It is a schematic diagram of the three-dimensional structure of the fixed rail according to the second embodiment of the present invention;

[0032] Fig.12 It is a front view structural schematic diagram of the slide rail assembly according to the third embodiment of the present invention;

[0033] Fig.13 This is a schematic diagram of the three-dimensional structure of the fixed rail according to the third embodiment of the present invention;

[0034] Fig.14 It is a front view structural schematic diagram of the slide rail assembly according to the fourth embodiment of the present invention;

[0035] Fig.15 It is a schematic diagram of the three-dimensional structure of the movable support frame according to the fourth embodiment of the present invention.

[0036] The meanings of the reference numerals are as follows:

[0037] 1. Fixed rail; 11. Support side wall; 12. Guide side wall; 13. First fixed wall; 14. Second fixed wall; 2. Movable support frame; 21. Rolling member; 211. First rolling member; 212. Second rolling member; 213. Third rolling member; 22. Upper side wall; 23. Lower side wall; 24. Connecting side wall; 25. Avoidance; 26. Rotating shaft; 27. First end portion; 28. Second end portion; 29. ​​Anti-sway structure; 3. Movable rail; 31. First inner side wall; 32. Second inner side wall; 33. Third inner side wall. DETAILED DESCRIPTION

[0038] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] Embodiment 1

[0043] See also Figures 1 to 9 The present embodiment discloses a slide rail assembly for a drawer, comprising a fixed rail 1, a movable support frame 2 and a movable rail 3; the fixed rail 1 is used to be fixed to the drawer installation opening of a table or a cabinet, and serves as a rail foundation 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 member, and a rolling member 21 is provided on the movable support frame 2, and the rolling member 21 can roll along the fixed rail 1; the movable rail 3 is slidably connected to the movable support frame 2, and the movable rail 3 is used to be connected to the drawer body, and can slide along the movable support frame 2;

[0044] like Figure 1 , Figure 3 and Figure 4 As shown, when the movable rail 3 slides and extends to the 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 is separated from the fixed rail 1, and the first end 27 is supported and connected to the movable rail 3, and the second end 28 of the movable support frame 2 exceeds 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 refer to Figure 1 The e1 direction in the second direction can refer to Figure 1 The e2 direction in .

[0045] The present embodiment provides a slide rail assembly. On the one hand, a rolling member 21 is provided on the movable support frame 2. The rolling member 21 can roll along the fixed rail 1 to reduce friction and wear. On the other hand, the movable support frame 2 is a rigid member. The movable support frame 2 can play the role of load-bearing connection between the fixed rail 1 and the movable rail 3 when the drawer is pulled out. Compared with the traditional plastic slide bead frame, it has a higher load-bearing capacity and supports a longer pull-out length, ensuring the stability and load-bearing performance of the drawer during the pull-out process. Moreover, importantly, when the movable rail 3 is fully extended, the second end 28 of the movable support frame 2 exceeds the movable rail 3 and is connected to the fixed rail 1. The supporting 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 The weight of the entire drawer system is dispersed 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 enables the movable rail 3 to be safely and stably pulled out for a longer distance, almost covering the entire internal space of the drawer. This design makes the drawer less likely to shake or tilt during the pulling-out process, and it can remain stable even when carrying heavier items. Moreover, this design allows the slide rail assembly to carry heavier loads while maintaining a smaller size and weight. In addition, in the extended state, the supporting 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, which 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.

[0046] In this way, by providing stable, smooth sliding performance and high load-bearing capacity through the movable support frame 2, the slide rail assembly for the drawer of this embodiment can significantly improve the user experience. The user can easily pull out and push back the drawer without any effort, while enjoying larger storage space and convenience.

[0047] like Figure 2 and Figure 5As shown, specifically, in this embodiment, when the movable rail 3 slides and retracts to the starting position along the second direction, the slide rail assembly switches to the retracted state, and the first end 27 of the movable support frame 2 is supported and connected between the fixed rail 1 and the sliding rail, and the second end 28 of the movable support frame 2 is supported and connected between the fixed rail 1 and the sliding rail. In this way, when the movable rail 3 is retracted to the starting position, both ends of the movable support frame 2 are supported between the fixed rail 1 and the movable rail 3, which 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, and by ensuring that the two 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, which helps to reduce friction and wear during the sliding process and 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. The user can easily push the drawer back to the starting position without effort, while enjoying a smoother and quieter sliding process.

[0048] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, preferably, in this embodiment, the fixed rail 1 has a supporting side wall 11 extending along the first direction, and the supporting side wall 11 is arranged transversely to provide a stable supporting 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 arranged at the first end 27, the third rolling element 213 is arranged at the second end 28, and the second rolling element 212 is arranged between the first end 27 and the second end 28;

[0049] like Figure 2 and Figure 5 As shown, when the movable rail 3 slides and retracts to the initial position along the second direction, the first rolling member 211, the second rolling member 212 and the third rolling member 213 are all supported between the inner side wall of the movable rail 3 and the supporting side wall 11, and they work together to ensure the stability and smoothness of the movable rail 3 during the retraction process;

[0050] When the movable rail 3 slides and extends to the final position along the first direction, the first rolling member 211 separates from the supporting side wall 11 and is completely 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 meet the extension requirements of the movable rail 3. At the same time, the second rolling member 212 still maintains the support state between the inner side wall of the movable rail 3 and the supporting side wall 11 to ensure the stability of the movable support frame 2 during the extension process. The third rolling member 213 is separated from the inner side wall of the movable rail 3 and is supported on the supporting side wall 11 of the fixed rail 1. This design helps to disperse the load-bearing of the movable rail 3 in the extended state and improve the load-bearing capacity of the entire slide rail assembly.

[0051] In this way, on the one hand, by dividing the rolling element 21 into the first rolling element 211, the second rolling element 212 and the third rolling element 213, and arranging them at different positions of the movable support frame 2, more precise sliding control and support can be achieved. This design enables the movable rail 3 to maintain smooth sliding performance during the extension and retraction process, reduces friction and wear, and improves the durability of the slide rail assembly; on the other hand, in the extended state, the change in the support mode of the first rolling element 211 and the third rolling element 213 helps to disperse the load-bearing capacity of the movable rail 3 and improve the load-bearing capacity of the entire slide rail assembly. This design makes the slide rail assembly It can carry heavier loads and is suitable for more diverse application scenarios; on the other hand, the second rolling element 212 remains in a supporting state between the inner wall of the movable rail 3 and the supporting side wall 11 in both the extended and retracted states, which helps to enhance the structural stability of the movable support frame 2 and prevent it from shaking or deforming during extension or retraction; on the other hand, this design enables the slide rail assembly to adapt to drawer systems of different sizes and weights to meet diverse application requirements. 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.

[0052] like Figure 8 and Fig. 9 As shown, specifically, in the present embodiment, the rolling member 21 has a rotating shaft 26, and the rolling member 21 is rotatably connected to the movable support frame 2 via the rotating shaft 26. The rotating shaft 26 is a connecting component between the rolling member 21 and the movable support frame 2, which allows the rolling member 21 to rotate freely during the sliding process, thereby reducing the friction with the contact surface of the slide rail and improving the sliding efficiency. Preferably, the rotating shaft 26 is set to be horizontal in the present embodiment, that is, its extension direction is perpendicular to the first direction (or the sliding direction of the drawer). This horizontally set rotating shaft 26 not only helps the rolling member 21 to remain stable during the sliding process, but also ensures sufficient contact between the rolling surface and the contact surface of the slide rail, further improving the sliding performance.

[0053] Preferably, the rotating shaft 26 is a pin. On the one hand, the pin is a simple and reliable connecting member with high strength and wear resistance, which can meet the requirements of the rotating connection of the rolling member 21. In addition, the diameter and length of the pin can be customized according to the structure of the rolling member 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 member 21 during the rotation process and extend the service life of the rolling member 21. At the same time, the pin as the rotating shaft 26 can also reduce the fatigue damage of the movable support frame 2 during the sliding process and improve the durability of the entire slide rail assembly. On the other hand, the rigidity and stability of the pin as the rotating shaft 26 can effectively prevent the rolling member 21 from loosening under vibration and impact conditions. This design allows the drawer to remain stable when subjected to external forces and avoid noise and jamming. On the other hand, the pin as the rotating shaft 26 has a simple structure and installation method, which makes the installation and maintenance of the rolling member 21 easier. Users can replace and maintain the rolling member 21 with simple tools (such as wrenches, screwdrivers, etc.), reducing the use cost and maintenance difficulty.

[0054] Preferably, in this embodiment, the rolling element 21 may be, but is not limited to, a supporting roller or a supporting ball, etc., which may be selected according to actual needs and is not limited here.

[0055] It should be noted that in some other embodiments, the shaft 26 may be formed not limited to rivets or sleeves, and may be selected according to actual needs, and is not limited here.

[0056] like Figure 2 , Figure 3 , Figure 8 and Fig. 9 As shown, specifically, in this embodiment, the first end 27 is provided with a first opening (not numbered in the figure), the second end 28 is provided with a third opening (not numbered in the figure), a second opening (not numbered in the figure) is provided between the first end 27 and the second end 28, one side of the first rolling member 211 can be exposed from the first opening to contact the inner side wall of the movable rail 3, one side of the second rolling member 212 can be exposed from the second opening to contact the inner side wall of the movable rail 3, and one side of the third rolling member 213 can be exposed from the third opening to contact the inner side wall of the movable rail 3. In this way, by accurately setting the position and size of the opening, the best contact between the rolling member 21 and the inner side wall of the movable rail 3 can be ensured. This design reduces friction and wear during sliding, prolongs the service life of the rolling member 21 and the movable rail 3, and thus reduces maintenance costs. In addition, the design of the opening makes the structure of the movable support frame 2 more concise and clear, and reduces unnecessary complex components, which not only reduces production costs, but also improves production efficiency, because a simpler structure means fewer processing steps and a faster assembly process.

[0057] like Figure 2 , Figure 3 , Figure 4 , Figure 8 and Fig. 9 As shown, more preferably, in this embodiment, the first rolling members 211 are arranged in pairs, and each pair of first rolling members 211 is relatively arranged at the first end 27 up and down. This design helps to provide more stable and uniform support for the first end 27 during the extension or retraction of the movable rail 3, and reduce the shaking or friction caused by single-point support; the third rolling members 213 are arranged in pairs, and each pair of third rolling members 213 is relatively arranged at the second end 28 up and down. This design enables the third rolling members 213 to be more evenly supported on the supporting side wall 11 of the fixed rail 1 in the extended state, thereby improving the stability of the entire movable support frame 2 during the extension process; the second rolling members 212 are arranged in pairs, and each pair of second rolling members 212 is relatively arranged between the first end 27 and the second end 28 up and down. 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 can form good contact with the inner side wall of the movable rail 3 and the supporting 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.

[0058] like Figure 3 , Figure 4 , Figure 7 , Figure 8 and Fig. 9 As shown, preferably, in this embodiment, the movable rail 3 has a first inner wall 31 and a second inner wall 32, the first inner wall 31 and the second inner wall 32 both extend along the first direction and are both arranged transversely, the first inner wall 31 is located above the movable support frame 2, and the second inner wall 32 is located below the movable support frame 2; when the movable rail 3 slides and extends to the final position along the first direction, each pair of first rolling members 211 is respectively supported on the first inner wall 31 and the second inner wall 32, each pair of second rolling members 212 is respectively supported on the upper side and the lower side of the supporting side wall 11, and each pair of second rolling members 2 12 is also supported on the first inner wall 31 and the second inner wall 32 respectively. This design enables 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 members 213 is also supported on the upper and lower sides of the supporting side wall 11 respectively. This design not only helps to disperse the load-bearing of the movable rail 3 in the extended state, but also ensures good contact between the third rolling members 213 and the supporting side wall 11, further improving the sliding performance and stability of the slide rail assembly.

[0059] like Figure 7 , Figure 8 and Fig. 9As shown, preferably, in this embodiment, the movable support frame 2 includes an upper side wall 22, a lower side wall 23 and two connecting side walls 24, and these side walls together form a surrounding structure, thereby providing a more stable and solid supporting surface; specifically, the upper side wall 22 is located above the supporting side wall 11 and below the first inner side wall 31, the lower side wall 23 is located below the supporting side wall 11 and above the second inner side wall 32, and the two connecting side walls 24 are arranged between the upper side wall 22 and the lower side wall 23, thereby forming a surrounding structure for the supporting side wall 11, this design not only enhances the structural strength of the movable support frame 2, but also provides it with more uniform support;

[0060] More specifically, in this embodiment, the above-mentioned first openings are respectively arranged on the upper side wall 22 and the lower side wall 23, the second openings are respectively arranged on the upper side wall 22 and the lower side wall 23, and the third openings are respectively arranged on the upper side wall 22 and the lower side wall 23. In addition, in the configuration of the rolling element 21, each pair of the first rolling element 211, the second rolling element 212 and the third rolling element 213 are respectively arranged on the upper side wall 22 and the lower side wall 23 of the movable support frame 2. This design enables the rolling element 21 to disperse the load more evenly, thereby further improving the load-bearing capacity of the slide rail assembly.

[0061] It should be noted that, in some other embodiments, the first rolling member 211 may be only provided at the first end 27, and the third rolling member 213 may be only provided at the second end 28; specifically, the first rolling member 211 may be only provided at the upper side wall 22, and the third rolling member 213 may be only provided at the lower side wall 23. In this case, when the movable rail 3 slides and extends to the final position along the first direction, the first rolling member 211 is only supported on the first inner side wall 31, and the third rolling member 213 is only supported on the lower side of the supporting side wall 11; or, the first rolling member 211 may be only provided at the lower side wall 23, and the third rolling member 213 may be only provided at the upper side wall 22. In this case, when the movable rail 3 slides and extends to the final position along the first direction, the first rolling member 211 is only supported on the second inner side wall 32, and the third rolling member 213 is only supported on the upper side of the supporting side wall 11. You can choose according to actual needs, and there is no sole limitation here.

[0062] More specifically, in this embodiment, one of the connecting side walls 24 is provided with an escape opening 25 , and the supporting side wall 11 of the fixed rail 1 can extend from the escape opening 25 into the space surrounded by the upper side wall 22 , the lower side wall 23 and the connecting side wall 24 .

[0063] More specifically, in this embodiment, the rotating shaft 26 is connected to the connecting side wall 24 .

[0064] And, if Figure 7 , Figure 8 and Fig. 9As shown, the movable rail 3 is also provided with two third inner side walls 33, which are arranged between the first inner side wall 31 and the second inner side wall 32. The first inner side wall 31, the second inner side wall 32 and the third inner side wall 33 surround the movable support frame 2, and correspond to the surrounding structure of the movable support frame 2, forming a more stable overall structure. In this way, the upper side wall 22, the lower side wall 23 and the connecting side wall 24 of the movable support frame 2 jointly surround the supporting side wall 11 of the fixed rail 1, and the first inner side wall 31, the second inner side wall 32 and the third inner side wall 33 of the movable rail 3 surround the movable support frame 2. This double surrounding design not only enhances the structural stability of the slide rail assembly, but also provides it with a higher load-bearing capacity. Importantly, due to the increase in load-bearing capacity, the length of the movable support frame 2 is allowed to be shortened, thereby making the slide rail assembly more compact and efficient, and suitable for occasions with limited space.

[0065] Since the length of the movable support frame 2 is allowed to 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 Thus, by setting L1 less than or equal to The length of the movable support frame 2 is reasonably limited to avoid unnecessary waste of materials. 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 rail assembly, making the overall design of the furniture more compact and reasonable.

[0066] like Figure 7 , Figure 8 and Fig. 9 As shown, preferably, in this embodiment, the fixed rail 1 also includes a guide side wall 12, which extends along the first direction, and is vertically connected to the supporting side wall 11. The connecting side wall 24 is provided with an anti-sway structure 29, and the two sides of the anti-sway structure 29 are respectively against the guide side wall 12 and the third inner side wall 33. In this way, the provision of the anti-sway structure 29 effectively prevents the swing or shaking of the movable support frame 2 and the movable rail 3 during the sliding process. This design not only enhances the structural stability of the slide rail assembly, but also improves its load-bearing capacity, so that the drawer can carry a larger load without deformation or damage. In this way, the addition of the guide side wall 12 and the anti-sway structure 29 enables the movable support frame 2 to move along a more clear and stable path during the sliding process, 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.

[0067] Preferably, in this embodiment, the anti-sway structure 29 is an anti-sway roller rotatably arranged on the connecting side wall 24. The anti-sway roller enables the movable support frame 2 to move along a smoother path during the sliding process, and the rolling characteristics of the roller reduce the friction and resistance during the sliding process, thereby improving the sliding performance and smoothness of the slide rail assembly.

[0068] Preferably, in this embodiment, the movable support frame 2 is made of iron material. Thus, on the one hand, the high strength characteristics of the iron material enable the movable support frame 2 to bear a greater weight and more complex stress conditions, thereby improving the load-bearing capacity and stability of the drawer slide rail assembly, which helps to ensure that the drawer will not experience unstable phenomena such as shaking or tilting during the sliding process, and improves the overall quality and safety of the furniture; on the other hand, the iron material has good wear resistance and can resist the friction and wear generated by the drawer during long-term use, which helps to extend the service life of the movable support frame 2, reduce maintenance costs, and enhance the user experience; on the other hand, the iron material has a lower cost than other high-performance materials (such as stainless steel, aluminum alloy, etc.), which effectively controls the production cost of the movable support frame 2. At the same time, the processability and plasticity of the iron material also improve the production efficiency, further reducing the production cost. These factors together constitute the cost-effectiveness advantage of the iron material in the movable support frame 2.

[0069] It should be noted that, in some other embodiments, the movable support frame 2 may also be made of, but not limited to, a relatively high-strength alloy material or plastic, which can be selected according to actual needs and is not the only limitation herein.

[0070] like Figure 7 As shown, specifically, in this embodiment, the fixed rail 1 also includes a first fixed wall 13 and a second fixed wall 14 both extending in the first direction, the first fixed wall 13 is vertically arranged, the second fixed wall 14 is horizontally arranged, the first fixed wall 13, the second fixed wall 14, the guide side wall 12 and the supporting side wall 11 are connected in sequence, the supporting side wall 11 and the guide side wall 12 are connected to form an L-shaped structure, and the supporting side wall 11 is turned outward relative to the first fixed wall 13.

[0071] Embodiment 2

[0072] See also Fig.10 and Fig.11The main difference between this embodiment and the first embodiment is that the setting position of the supporting side wall 11 relative to the first fixed wall 13 is different; specifically, in this embodiment, the fixed rail 1 also includes a first fixed wall 13 and a second fixed wall 14 both extending in the first direction, the first fixed wall 13 is vertically arranged, the second fixed wall 14 is horizontally arranged, the first fixed wall 13, the second fixed wall 14, the guide side wall 12 and the supporting side wall 11 are connected in sequence, the supporting side wall 11 and the guide side wall 12 are connected to form an L-shaped structure, and the supporting side wall 11 is turned inward relative to the first fixed wall 13.

[0073] Embodiment 3

[0074] See also Fig.12 and Fig.13 The main difference between this embodiment and the first and second embodiments is that the supporting side wall 11 and the guiding side wall 12 are connected to form a T-shaped structure; thus, on the one hand, the vertical part (the guiding side wall 12) and the horizontal part (the supporting side wall 11) of the T-shaped structure jointly share the weight from the rolling element 21, making the overall structure more solid; on the other hand, the contact area between the rolling element 21 and the supporting side wall 11 is increased, which helps to disperse the pressure exerted by the rolling element 21 on the side wall, thereby reducing the stress per unit area, helping to prevent local overload and wear, and extending the service life of the structure.

[0075] Embodiment 4

[0076] See also Fig.14 and Fig.15 The main difference between this embodiment and Embodiment 1, Embodiment 2 and Embodiment 3 is that the anti-sway structure 29 is an anti-sway block fixedly arranged on the connecting side wall 24; thus, 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 process of the drawer, thereby ensuring a stable anti-sway effect; on the other hand, the fixed anti-sway block does not require an additional motion mechanism or complex connecting parts, so the production cost can be significantly reduced. 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 the manufacturing cost.

[0077] In summary, the slide rail assembly disclosed in the present invention can at least bring the following beneficial technical effects:

[0078] 1) The movable support frame 2 is a rigid part. When the drawer is pulled out, the movable support frame 2 can play the role of load-bearing connection between the fixed rail 1 and the movable rail 3. Compared with the traditional plastic slide bead frame, it has a higher load-bearing capacity and supports a longer pull-out length, ensuring the stability and load-bearing performance of the drawer during the pull-out process;

[0079] 2) When the movable rail 3 is fully extended, the supporting connection between the second end 28 and the fixed rail 1 provides additional load-bearing support for the drawer, forming an additional support point, which helps to disperse and balance the weight of the entire drawer system, thereby enhancing the structural stability of the entire slide rail assembly in the extended state;

[0080] 3) In the extended state, the change in the supporting mode of the first rolling member 211 and the third rolling member 213 helps to disperse the load-bearing 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 carry heavier loads and is suitable for more diverse application scenarios;

[0081] 4) The upper side wall 22, the lower side wall 23 and the connecting side wall 24 of the movable support frame 2 together surround the supporting side wall 11 of the fixed rail 1, while the first inner side wall 31, the second inner side wall 32 and the third inner side wall 33 of the movable rail 3 surround the movable support frame 2. This double surrounding design not only enhances the structural stability of the slide rail assembly, but also provides it with a higher load-bearing capacity.

[0082] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A slide rail assembly for a drawer, characterized in that: include: Fixed rail (1); A movable support frame (2) is slidably connected to the fixed rail (1); the movable support frame (2) is a rigid member; a rolling member (21) is provided on the movable support frame (2); and the rolling member (21) can roll along the fixed rail (1); A movable rail (3) slidably connected to the movable support frame (2); When the movable rail (3) slides out to a final position along a first direction, the slide rail assembly switches to an extended state, the first end (27) of the movable support frame (2) is separated 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) exceeds 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.

2. The slide rail assembly according to claim 1, characterized in that: The fixed rail (1) comprises a supporting side wall (11) extending along the first direction, the supporting side wall (11) being arranged transversely, the rolling element (21) comprising a first rolling element (211), a second rolling element (212) and a third rolling element (213), the first rolling element (211) being arranged at the first end (27), the third rolling element (213) being arranged at the second end (28), and the second rolling element (212) being arranged between the first end (27) and the second end (28); When the movable rail (3) slides back to an initial position along the second direction, the first rolling member (211), the second rolling member (212) and the third rolling member (213) are all supported between the inner side wall of the movable rail (3) and the supporting side wall (11); When the movable rail (3) slides and extends to a final position along a first direction, the first rolling member (211) and the supporting side wall (11) are separated, the first rolling member (211) is supported on the inner side wall of the movable rail (3), the second rolling member (212) is supported between the inner side wall of the movable rail (3) and the supporting side wall (11), the third rolling member (213) and the inner side wall of the movable rail (3) are separated, and the third rolling member (213) is supported on the supporting side wall (11).

3. The slide rail assembly according to claim 2, characterized in that: The rolling element (21) has a rotating shaft (26), and the rolling element (21) is rotatably connected to the movable support frame (2) via the rotating shaft (26). The rotating shaft (26) is arranged transversely and is a pin.

4. The slide rail assembly according to claim 2, characterized in that: The second rolling elements (212) are arranged in pairs, and each pair of the second rolling elements (212) is arranged vertically and relatively between the first end portion (27) and the second end portion (28).

5. The slide rail assembly according to claim 4, characterized in that: The movable rail (3) comprises a first inner side wall (31) and a second inner side wall (32), the first inner side wall (31) and the second inner side wall (32) both extend along the first direction and are arranged transversely, the first inner side wall (31) is located above the movable support frame (2), and the second inner side wall (32) is located below the movable support frame (2); When the movable rail (3) slides out along the first direction to a final position, the first rolling member (211) is supported on the first inner side wall (31) and / or the second inner side wall (32), the third rolling member (213) is supported on the upper side and / or the lower side of the supporting side wall (11), each pair of the second rolling members (212) is supported on the upper side and the lower side of the supporting side wall (11), and each pair of the second rolling members (212) is also supported on the first inner side wall (31) and the second inner side wall (32).

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

7. The slide rail assembly according to claim 6, characterized in that: The fixed rail (1) further comprises a guide side wall (12), the guide side wall (12) extending along a first direction, the guide side wall (12) being vertically connected to the supporting side wall (11), the connecting side wall (24) being provided with an anti-sway structure (29), the two sides of the anti-sway structure (29) respectively abutting against the guide side wall (12) and the third inner side wall (33).

8. The slide rail assembly according to claim 7, characterized in that: The anti-sway structure (29) is an anti-sway roller rotatably arranged on the connecting side wall (24) or an anti-sway block fixedly arranged on the connecting side wall (24).

9. The slide rail assembly according to claim 1, characterized in that: The movable support frame (2) is made of iron material.

10. The slide rail assembly according to any one of claims 1 to 9, characterized in that: 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

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