Plastic slide rail

Abstract

The utility model relates to a slide rail technical field especially a kind of plastic slide rail, including fixed rail, the movable rail of sliding assembly in the fixed rail, the top wall of the fixed rail one end is set with the clamping column, the movable rail one end is set with the clamping slot towards the clamping column, the setting position of the clamping column and the clamping slot corresponds, when the movable rail slides and is completely entered into the fixed rail, the inner wall clamping assembly of the clamping column and the clamping slot, by setting the assembly structure of clamping column and clamping slot, effectively solved the defect of traditional magnetic attraction locking mode in magnetic article storage scene, when drawer is completely pushed in, the arc surface part, curved surface part clamping of clamping column and clamping slot realizes locking, the hyperboloid part of clamping slot forms bidirectional resistance in movable rail sliding process, both can resist slight vibration or accidental touching external force, prevent drawer accidental slip, and can provide elastic buffer when drawing, reduce the impact load caused by fast drawing.

Description

Technical Field

[0001] This utility model relates to the field of slide rail technology, and in particular to a plastic slide rail. Background Technology

[0002] A drawer slide is a connecting component fixed to a cabinet. It connects drawers or cabinet panels to the cabinet, making it easier to pull out or push in drawers or cabinet panels, thus making drawers more convenient to use. A metal cabinet is a compact storage furniture made primarily of cold-rolled steel. It is manufactured through processes such as stamping, welding, and powder coating, and has the characteristics of being fireproof, moisture-proof, pressure-resistant, wear-resistant, and rust-proof. Metal cabinets are often equipped with drawer slides to achieve flexible opening and closing, making them suitable for storing small and delicate items such as Lego parts. The interior is organized by layers or design to prevent parts from scattering. In contrast, conventional one-piece injection-molded plastic storage cabinets lack drawer slides, making them inconvenient to open and close and difficult to meet the needs of high-frequency access.

[0003] For storage of small, delicate items such as Lego pieces, metal cabinets are typically designed to be small in size, whether for easy access or to avoid taking up too much space. Therefore, to ensure smooth sliding of drawers in metal cabinets, traditional metal slides that have been scaled down proportionally are usually used. However, the plastic locking mechanism originally used to fix the drawer position cannot be installed because it cannot be scaled down to fit within the effective space of the small cabinet. To solve this problem, existing technology embeds a magnet behind the fixed side wall of the internal frame of the cabinet. When the drawer is fully pushed in and closed when not in use, the iron structure at the back of the drawer will be tightly attracted to the magnet, thus preventing the drawer from accidentally sliding out due to slight vibration or accidental contact.

[0004] However, installing magnets in metal cabinets to lock drawers and slides can cause magnetic items such as hard drives, precision instruments, and magnetic cards to be abnormally attracted to the cabinet walls, leading to displacement, collisions, or structural damage. It can even destroy the magnetism of the magnetic items, causing them to become ineffective and inconveniencing users. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a plastic slide rail that overcomes the defects in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a plastic slide rail, including a fixed rail and a movable rail slidably assembled in the fixed rail. A snap-fit ​​post is provided on the top wall of one end of the fixed rail facing upwards. A snap-fit ​​groove is provided on one end of the movable rail facing the snap-fit ​​post. The snap-fit ​​post and the snap-fit ​​groove are positioned correspondingly. When the movable rail slides to fully enter the fixed rail, the snap-fit ​​post is snapped into the inner wall of the snap-fit ​​groove.

[0007] The sidewall of the snap-fit ​​groove is provided with an arc-shaped surface, and the two ends of the arc-shaped surface are bent and tapered toward the snap-fit ​​post.

[0008] The sidewall of the snap-fit ​​groove is also provided with a curved surface, which gradually expands and bends from both ends of the arc surface toward the snap-fit ​​post.

[0009] The curved surface is provided in two sets, and the curved surface is used to provide a buffer force for the sliding of the movable track.

[0010] The top wall of the movable rail is provided with a third buffer hole, and there are two sets of the third buffer holes, which are located on both sides of the snap-fit ​​groove.

[0011] The fixed rail has an upwardly protruding limiting strip on its top wall, and the movable rail has an upwardly protruding limiting groove on its bottom wall, with the limiting strip slidably fitted into the limiting groove.

[0012] The fixed rail has an upward-facing sliding groove on its top wall, which is located outside the limiting strip. The movable rail has an outwardly protruding sliding strip on its side wall, which is slidably fitted into the sliding groove.

[0013] The sliding bar is provided in two sets, and the sliding groove is also provided in two sets accordingly.

[0014] The inner wall of the sliding groove is provided with a first buffer hole, and each set of sliding grooves has three sets of first buffer holes, which are distributed in pairs at equal intervals.

[0015] The fixed rail has a side wall with an anti-detachment protrusion that protrudes towards the movable rail. The anti-detachment protrusion is located above the sliding bar and is in clearance fit with the side wall of the movable rail.

[0016] The top wall of the fixed rail has three sets of anti-detachment protrusions on each side, which are distributed in pairs at equal intervals.

[0017] The top wall of the limiting strip has a first tight-fitting groove facing downwards. The inner wall of the limiting groove has a hook that protrudes towards the fixed rail. The hook is slidably fitted in the first tight-fitting groove and is used to prevent the movable rail from sliding off the fixed rail.

[0018] The fixed rail has a downward-facing protrusion on its side wall for engaging with the cabinet body, and the first peripheral protrusion is located below the first buffer hole.

[0019] The first surrounding protrusion is provided in four sets, and is arranged in pairs equidistantly opposite each other on the side wall of the fixed rail.

[0020] The bottom wall of the fixed rail has a downward-facing protrusion with a first central protrusion for engaging with the cabinet.

[0021] The first central protrusion is provided in two sets, and is respectively located between the two sets of the first surrounding protrusions facing each other.

[0022] The sidewall of the movable rail has an upward-facing protrusion for engaging with the drawer.

[0023] The second surrounding protrusion is provided in four sets, and is arranged in pairs equidistantly opposite each other on the side wall of the movable rail.

[0024] The top wall of the movable rail has an upward-facing protrusion for engaging with the drawer.

[0025] The second central protrusion is provided in two sets, and is respectively located between two opposing sets of the second peripheral protrusions.

[0026] The inner wall of the limiting groove is provided with a second buffer hole. There are four sets of the second buffer holes, and each set of the buffer holes is located below the second surrounding protrusion.

[0027] The first tight-fit groove has a first inclined surface on its side wall, which gradually slopes from the side wall of the first tight-fit groove toward the limiting groove. The hook has a second inclined surface, which slopes from the bottom wall of the limiting groove toward the first tight-fit groove.

[0028] Both the fixed rail and the movable rail are made of plastic.

[0029] The beneficial effects of this utility model are as follows: By setting the assembly structure of the locking post and the locking groove, the defects of the traditional magnetic locking method in the scenario of storing magnetic items are effectively solved. When the drawer is fully pushed in, the arc and curved surfaces of the locking post and the locking groove form a locking action. By utilizing the contraction characteristics of the arc surface and the progressive buffer design of the curved surface, stable locking is achieved and structural damage caused by hard collisions is avoided. The double-curved surface of the locking groove forms bidirectional resistance during the sliding process of the moving rail. It can resist the external force of slight vibration or accidental contact, prevent the drawer from accidentally slipping out, and provide elastic buffer when pulling out, reducing the impact load caused by rapid pulling out.

[0030] By using fixed and movable rails made of plastic, the injection-moldable properties of plastic allow for the design of complex snap-fit ​​grooves, buffer holes, and tight-fit structures. These precision structures are difficult to achieve with metal materials. Furthermore, the lightweight nature of plastic reduces the load on the cabinet, while its elastic modulus and the buffer hole structure work together to effectively absorb the vibration energy of the slide rail movement and extend its service life. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a plastic slide rail according to an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the assembled structure of a plastic slide rail according to an embodiment of this application;

[0033] Figure 3 This is a top view of a plastic slide rail according to an embodiment of this application;

[0034] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;

[0035] Figure 5 This is a first perspective view of the fixed rail in the embodiments of this application;

[0036] Figure 6 This is a second perspective view of the fixed rail in the embodiments of this application;

[0037] Figure 7 This is a first perspective view of the active track in the embodiments of this application;

[0038] Figure 8 This is a second perspective view of the active track in the embodiments of this application;

[0039] Figure 9 yes Figure 8 A magnified view of a portion of point B in the middle.

[0040] Explanation of reference numerals in the attached drawings: 1. Fixed rail; 2. Movable rail; 10. Snap-fit ​​post; 11. Limiting strip; 12. Sliding groove; 120. First buffer hole; 13. Anti-detachment protrusion; 14. First tight-fit groove; 15. First peripheral protrusion; 16. First central protrusion; 20. Snap-fit ​​groove; 201. Arc-shaped surface; 202. Curved surface; 21. Third buffer hole; 22. Limiting groove; 23. Sliding strip; 240. Hook; 241. Second buffer hole; 25. Second peripheral protrusion; 26. Second central protrusion; 3. First inclined surface; 4. Second inclined surface. Detailed Implementation

[0041] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so as to intuitively and vividly understand each technical feature and overall technical solution of the present utility model. However, they should not be construed as limiting the scope of protection of the present utility model.

[0042] In the description of this utility model, if directional descriptions are involved, such as "up," "down," "outside," etc., indicating directional or positional relationships, it is based on... Figures 5-8 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When a feature is referred to as "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0043] In the description of this utility model, the term "several" means one or more, and "multiple" means two or more. The terms "greater than," "less than," and "exceeding" should be understood as excluding the stated number. The terms "above," "below," and "within" should be understood as including the stated number. The terms "first" and "second" should be understood as distinguishing technical features and not as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0044] Furthermore, unless otherwise defined, the technical and scientific terms used in this invention have the same meanings as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for the purpose of describing particular embodiments only and not for limiting the invention. It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof.

[0045] Example: Figure 1-9 As shown, a plastic drawer slide includes a fixed rail 1 and a movable rail 2 slidably mounted in the fixed rail 1. A locking post 10 is provided on the top wall of one end of the fixed rail 1, facing upwards. A locking groove 20 is provided on one end of the movable rail 2 facing the locking post 10. The locking post 10 and the locking groove 20 are positioned correspondingly. When the movable rail 2 slides to fully enter the fixed rail 1, the locking post 10 engages with the inner wall of the locking groove 20. By setting the locking post 10 and locking groove 20 for engagement, the fixed rail 1 and the movable rail 2 are locked together, preventing the drawer from accidentally sliding out due to slight vibration or accidental contact.

[0046] The sidewall of the snap-fit ​​groove 20 is provided with an arc-shaped surface 201. The two ends of the arc-shaped surface 201 are tapered and bent toward the snap-fit ​​post 10. By providing the arc-shaped surface 201, a space is provided for the snap-fit ​​post 10 to be assembled in the snap-fit ​​groove 20. It is worth mentioning that the snap-fit ​​post 10 is a cylindrical structure. By providing the arc-shaped surface 201, the inner wall of the snap-fit ​​groove 20 contacts the outer wall of the snap-fit ​​post 10, increasing the contact area and improving the stability of the snap-fit ​​between the movable rail 2 and the fixed rail 1.

[0047] The sidewall of the snap-fit ​​groove 20 is also provided with a curved surface 202, which gradually expands and bends from both ends of the arc surface 201 toward the snap-fit ​​post 10.

[0048] The curved surface 202 is provided in two sets. The curved surface 202 is used to provide a buffer force for the sliding of the movable rail 2. By setting the curved surface 202, the locking post 10 will be subject to a certain resistance when sliding into or out of the locking groove 20, which provides a buffer space for the locking post 10 in the locking groove 20 during the locking assembly process, and prevents the drawer from being damaged by impact due to excessively fast pulling. At the same time, the design of the curved surface 202 plays a guiding role when the locking post 10 slides into or out of the locking groove 20.

[0049] The top wall of the movable rail 2 is provided with a third buffer hole 21. There are two sets of the third buffer holes 21, which are located on both sides of the snap-fit ​​groove 20. By providing the third buffer hole 21, a buffer space is provided to disperse the stress generated by the movable rail 2 during the assembly process of the fixed rail 1 and improve the sliding effect.

[0050] The fixed rail 1 has an upwardly protruding limiting strip 11 on its top wall, and the movable rail 2 has an upwardly protruding limiting groove 22 on its bottom wall. The limiting strip 11 is slidably assembled in the limiting groove 22.

[0051] The limiting strip 11 is provided in two sets. By setting the sliding assembly of the limiting strip 11 and the limiting groove 22, the sliding effect of the movable rail 2 in the fixed rail 1 is further improved.

[0052] The fixed rail 1 has a sliding groove 12 on its top wall facing upwards. The sliding groove 12 is located outside the limiting strip 11. The side wall of the movable rail 2 has a sliding strip 23 that protrudes outwards. The sliding strip 23 is slidably assembled in the sliding groove 12.

[0053] The sliding bar 23 is provided in two sets, and the sliding groove 12 is also provided in two sets accordingly. By setting the sliding bar 23 and sliding groove 12 for sliding assembly, the sliding effect of the movable rail 2 in the fixed rail 1 is further improved.

[0054] The inner wall of the sliding groove 12 is provided with a first buffer hole 120. Each set of sliding grooves 12 has three sets of first buffer holes 120 on its inner wall, which are distributed in pairs at equal intervals. By setting the first buffer hole 120, a buffer space is provided for the movement of the movable rail 2 on the fixed rail 1, thereby improving the stability of the sliding. In particular, when the drawer is pulled out and the movable rail 2 moves away from the fixed rail 1, the center of gravity changes. The design of the first buffer hole 120 allows the fixed rail 1 to provide a buffer space, which can achieve the effect of elastic deformation.

[0055] The fixed rail 1 has a side wall with an anti-detachment protrusion 13 that protrudes towards the movable rail 2. The anti-detachment protrusion 13 is located above the sliding bar 23 and is in clearance fit with the side wall of the movable rail 2.

[0056] The top wall of the fixed rail 1 has three sets of anti-detachment protrusions 13 on each side, which are distributed in pairs at equal intervals. The anti-detachment protrusions 13 prevent the movable rail 2 from falling off from the direction perpendicular to the fixed rail 1 during the sliding process of the fixed rail 1, thus affecting the use effect.

[0057] The top wall of the limiting strip 11 is provided with a first tight-fitting groove 14 facing downwards. The inner wall of the limiting groove 22 has a hook 240 protruding towards the fixed rail 1. The hook 240 is slidably fitted in the first tight-fitting groove 14. The hook 240 is used to prevent the movable rail 2 from sliding away from the fixed rail 1. By setting the hook 240, when the movable rail 2 is about to slide away from the fixed rail 1, the hook 240 can abut against the first tight-fitting groove 14 to prevent the movable rail 2 from continuing to slide and prevent the movable rail 2 from sliding to the end of the fixed rail 1 and falling off, causing the movable rail 2 to separate from the fixed rail 1, causing the drawer to fall off and affecting the use effect.

[0058] The fixed rail 1 has a downward-facing protrusion on its side wall for engaging with the cabinet. The first peripheral protrusion 15 is located below the first buffer hole 120.

[0059] The first surrounding protrusion 15 is provided in four sets, and is arranged in pairs at equal intervals on the side wall of the fixed rail 1. By providing the first surrounding protrusion 15, it is convenient for the fixed rail 1 to be snapped and assembled with the cabinet. The snap-fit ​​assembly method facilitates the assembly of the fixed rail 1 with the cabinet and improves the assembly efficiency.

[0060] The bottom wall of the fixed rail 1 has a downward protrusion with a first central protrusion 16 for engaging with the cabinet. The design of the first central protrusion 16, combined with the first surrounding protrusion 15, enhances the stability of the engagement between the fixed rail 1 and the cabinet.

[0061] The first central protrusion 16 is provided in two sets, and is respectively located between the two sets of the first surrounding protrusions 15 facing each other. By providing the first central protrusion 16, the snap-fit ​​assembly effect between the fixed rail 1 and the cabinet is further improved.

[0062] It is worth mentioning that the side wall of the cabinet is provided with a first peripheral groove for engaging with the first peripheral protrusion 15 and a first central groove for engaging with the first central protrusion 16. Since the plastic slide rail is suitable for metal cabinets, the first peripheral groove and the first central groove can be formed by stamping the steel plate. In terms of processing and assembly, the processing difficulty of wooden rails is greater than that of metal cabinets.

[0063] The movable rail 2 has an upward-facing protrusion on its side wall for engaging with the drawer.

[0064] The second surrounding protrusion 25 is provided in four sets, and is arranged in pairs at equal intervals on the side wall of the movable rail 2. By providing the second surrounding protrusion 25, it is convenient for the movable rail 2 to be snapped into the drawer.

[0065] The top wall of the movable rail 2 has an upward-facing protrusion with a second central protrusion 26 for engaging with the drawer.

[0066] The second central protrusion 26 is provided in two sets, and is respectively located between the two sets of the second surrounding protrusions 25 facing each other. By providing the second central protrusion 26, the snap-fit ​​assembly effect between the movable rail 2 and the drawer is further improved.

[0067] It is worth mentioning that the side wall of the drawer has a second peripheral groove for engaging with the second peripheral protrusion 25 and a second central groove for engaging with the second central protrusion 26. Since the plastic slide rail is suitable for metal cabinets, the second peripheral groove and the second central groove can be formed by stamping the steel plate. In terms of processing and assembly, the wooden slide rail is more difficult to process than the metal cabinet.

[0068] The inner wall of the limiting groove 22 is provided with a second buffer hole 241. There are four sets of the second buffer holes 241, and each set of the second buffer holes 241 is correspondingly located below the second peripheral protrusion 25. By providing the second buffer holes 241, the second peripheral protrusion 25 is provided with space for elastic deformation when it is engaged with the drawer.

[0069] The first tight-fit groove 14 has a first inclined surface 3 on its side wall. The first inclined surface 3 is gradually inclined from the side wall of the first tight-fit groove 14 toward the limiting groove 22. The hook part 240 has a second inclined surface 4. The second inclined surface 4 is inclined from the bottom wall of the limiting groove 22 toward the first tight-fit groove 14. The first inclined surface 3 and the second inclined surface 4 facilitate the insertion of the hook part 240 into the first tight-fit groove 14, thereby facilitating the assembly of the movable rail 2 and the fixed rail 1.

[0070] Both the fixed rail 1 and the movable rail 2 are made of plastic. By using a structure made of plastic, weight can be reduced and it is also convenient to form a specific structure through injection molding. The structural design is more flexible than that of metal rails.

[0071] This embodiment provides a specific design dimension: the outer diameter of the snap-fit ​​post 10 is 10mm, the shortest straight distance between the two sets of curved surfaces 202 is 9.5~9.7mm, preferably 9.6mm, the diameter of the arc part is 11.5~11.7mm, preferably 11.6mm, and the central angle α is 250°-260°, preferably 255°.

[0072] The implementation principle of a plastic slide rail in this embodiment is as follows: In use, the movable rail 2 engages with the drawer side panel, and the fixed rail 1 engages with the cabinet body. When the drawer is fully pushed into the cabinet, the engaging groove 20 at the end of the movable rail 2 engages with the engaging post 10 at the top of the fixed rail 1. The self-locking is achieved by utilizing the characteristics of the arc surface 201 and curved surface 202 of the engaging groove 20. The contraction structure of the arc surface 201 allows the engaging post 10 to slide in, while the progressive bending design of the curved surface 202 forms bidirectional resistance after being fully engaged, preventing slippage due to slight vibration or accidental contact. When the drawer is pulled out, the pulling force applied by the user causes the engaging post 10 to gradually withdraw from the engaging groove 20. The buffer design of the curved surface 202 slows down the sliding speed and avoids hard collisions. At the same time, the anti-slip protrusion 13 prevents the movable rail 2 from falling off from the side. When the movable rail 2 slides out to the end, the hook 240 abuts against the first tight-fitting groove 14, preventing the movable rail 2 from completely disengaging from the fixed rail 1, ensuring that the drawer will not fall off due to excessive pulling.

[0073] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications and substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A plastic slide rail characterized by: The device includes a fixed rail and a movable rail slidably mounted in the fixed rail. A snap-fit ​​post is provided on the top wall of one end of the fixed rail facing upwards. A snap-fit ​​groove is provided on one end of the movable rail facing the snap-fit ​​post. The snap-fit ​​post and the snap-fit ​​groove are positioned correspondingly. When the movable rail slides to fully enter the fixed rail, the snap-fit ​​post engages with the inner wall of the snap-fit ​​groove.

2. The plastic slide rail according to claim 1, wherein: The sidewall of the snap-fit ​​groove is provided with an arc-shaped surface, and the two ends of the arc-shaped surface are bent and tapered toward the snap-fit ​​post.

3. The plastic slide rail according to claim 2, wherein: The sidewall of the snap-fit ​​groove is also provided with a curved surface, which gradually expands and bends from both ends of the arc surface toward the snap-fit ​​post.

4. The plastic slide rail according to claim 3, wherein: The top wall of the movable rail is provided with a third buffer hole. There are two sets of the third buffer holes, which are located on both sides of the snap-fit ​​groove.

5. A plastic slide rail according to claim 4, characterized in that: The top wall of the fixed rail has an upwardly protruding limiting strip, and the bottom wall of the movable rail has an upwardly opening limiting groove, with the limiting strip slidably fitted into the limiting groove.

6. A plastic slide rail according to claim 5, characterized in that: The top wall of the fixed rail has an upward-facing sliding groove, which is located outside the limiting strip. The side wall of the movable rail has an outwardly protruding sliding strip, which is slidably fitted into the sliding groove.

7. A plastic slide rail according to claim 6, characterized in that: The side wall of the fixed rail has an anti-detachment protrusion that protrudes towards the movable rail. The anti-detachment protrusion is located above the sliding bar and is in clearance fit with the side wall of the movable rail.

8. A plastic slide rail according to claim 7, characterized in that: The top wall of the limiting strip has a first tight-fitting groove facing downwards. The inner wall of the limiting groove has a hook that protrudes towards the fixed rail. The hook is slidably fitted in the first tight-fitting groove and is used to prevent the movable rail from sliding off the fixed rail.

9. A plastic slide rail according to claim 8, characterized in that: The sidewall of the movable rail has an upward-protruding second circumferential protrusion for engaging with the drawer.

10. A plastic slide rail according to any one of claims 1-9, characterized in that: Both the fixed rail and the movable rail are made of plastic.

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