Improved three-section slide rail

Abstract

This utility model relates to an improved three-section drawer slide, including an upper rail, a lower rail, and a composite rail disposed between the upper and lower rails. A first ball bearing assembly is provided between the composite rail and the upper rail, and a second ball bearing assembly is provided between the composite rail and the lower rail. A first locking mechanism is provided between the lower right side of the upper rail and the upper right side of the composite rail, and a first limiting mechanism is provided near the lower left side of the upper rail. A second locking mechanism is provided between the upper left side of the lower rail and the lower left side of the composite rail, and a second limiting mechanism is provided near the upper right side of the lower rail. A first installation auxiliary mechanism is provided on the upper rail, a second installation auxiliary mechanism is provided on the lower rail, and an adjustment mechanism is also provided on the upper rail. This solution has a reasonable and thoughtful structural design, is flexible and convenient to use, has low mechanical noise, and provides a good user experience. The three-section drawer slide has the advantages of extending the drawer's opening stroke and improving the stability and structural strength of the three-section drawer slide through the overlapping area of ​​the three sections.

Description

Technical Field

[0001] This utility model relates to the field of slide rail accessories technology, and in particular to an improved three-section slide rail. Background Technology

[0002] The types of existing slide rails vary depending on the application, such as two-section slide rails or three-section slide rails.

[0003] Among them, Chinese patent application number 202222611522.8, "A Three-Section Synchronous Drawer Slide," although it solves the problem that "drawer slides are affected by resistance during use, causing users to be unable to pull out the drawer, or causing the slide to fall off or loosen due to excessive force," still has the following defects:

[0004] (1) Limiting blocks are provided at both ends of the left side of the upper rail surface. Although the limiting blocks can limit the ball connection, they will also scratch the middle rail during use.

[0005] (2) The two ends on the left side of the middle rail surface protrude from the two sides of the lower rail, and the two ends on the right side of the lower rail surface are provided with protrusions. The middle rail slides and engages with the lower rail through the provided protrusions. When the protrusions of the middle rail slide on the slide rails on both sides of the top surface of the lower rail, there is resistance and wear will occur after long-term use. Similarly, when the protrusions of the lower rail slide relative to the lower surface of the middle rail, there is also resistance and wear will occur after long-term use.

[0006] In order to overcome the problems mentioned above in the patent "a three-section synchronous drawer slide", we invented an improved three-section slide. Utility Model Content

[0007] The purpose of this invention is to solve the problems in the prior art where the limiting block of a "three-section synchronous drawer slide" causes scratches and resistance to the middle slide, and the middle and lower slide protrusions experience high resistance, are inflexible, and wear after prolonged use. The specific solution is as follows:

[0008] An improved three-section slide rail includes an upper rail, a lower rail, and a composite rail disposed between the upper and lower rails. A first ball bearing assembly is disposed between the composite rail and the upper rail, and a second ball bearing assembly is disposed between the composite rail and the lower rail. A first locking mechanism is disposed between the lower right side of the upper rail and the upper right side of the composite rail, and a first limiting mechanism is disposed near the lower left side of the upper rail. A second locking mechanism is disposed between the upper left side of the lower rail and the lower left side of the composite rail, and a second limiting mechanism is disposed near the upper right side of the lower rail. A first installation auxiliary mechanism is disposed on the upper rail, a second installation auxiliary mechanism is disposed on the lower rail, and a third installation auxiliary mechanism is disposed on the composite rail, the first ball bearing assembly, and the second ball bearing assembly. An adjustment mechanism is also disposed on the upper rail.

[0009] Furthermore, the composite rail includes an upper inner rail and a lower inner rail fixedly connected back-to-back with the upper inner rail. A third limiting mechanism is provided near the right end of the upper inner rail, and a fourth limiting mechanism is provided near the left end of the lower inner rail.

[0010] Furthermore, the first locking mechanism includes a first locking plate vertically disposed on the lower right side of the upper rail and a first locking sleeve fitted on the first locking plate, the first locking sleeve being able to lock the locking port at the right end of the upper inner rail.

[0011] Furthermore, the second locking mechanism includes a second locking plate vertically disposed on the upper left side of the lower rail and a second locking sleeve fitted on the second locking plate, the second locking sleeve being able to lock the locking port at the left end of the lower inner rail.

[0012] Furthermore, the first ball assembly is disposed between the upper inner rail and the upper rail, and includes a ball frame and balls disposed in toothed blocks on both sides of the ball frame. The third limiting mechanism can abut against and limit the right end of the first ball assembly.

[0013] Furthermore, the second ball assembly is disposed between the lower inner rail and the lower rail, and includes a ball frame and balls disposed in toothed blocks on both sides of the ball frame; the fourth limiting mechanism can abut against and limit the left end of the second ball assembly.

[0014] Furthermore, the toothed block has one tooth accommodating one ball; a buffer block is provided at each of the left and right ends of the ball holder.

[0015] Furthermore, the first limiting mechanism includes a first limiting block vertically disposed on the upper rail and a first protective sleeve fitted on the first limiting block, the first protective sleeve being able to abut and limit the left end of the first ball assembly. The second limiting mechanism includes a second limiting block vertically disposed on the lower rail and a second protective sleeve fitted on the second limiting block, the second protective sleeve being able to abut and limit the right end of the second ball assembly.

[0016] Furthermore, the first mounting auxiliary mechanism comprises multiple mounting auxiliary holes provided on the upper rail, and the second mounting auxiliary mechanism comprises multiple mounting auxiliary holes provided on the lower rail. The third mounting auxiliary mechanism comprises multiple mounting auxiliary holes respectively provided on the composite rail, the first ball bearing assembly, and the second ball bearing assembly.

[0017] Furthermore, the adjustment mechanism is an upwardly protruding rectangular boss located around the screw holes of the upper rail, used to adjust the installation gap between the upper rail and the drawer frame.

[0018] In summary, the technical solution of this utility model has the following beneficial effects:

[0019] This invention solves the problems of the prior art's "three-section synchronous drawer slide" where the limiting blocks scratch the middle rail and create resistance, and the middle and lower rail protrusions experience high resistance, inflexibility, and wear over time. The present invention utilizes a ball bearing and sliding structure for all slides between the upper and upper inner rails, and between the lower inner and lower rails. This results in minimal resistance, high flexibility, and ease of use for the three-section slide, completely avoiding the shortcomings of the prior art. The first locking mechanism of this invention can lock the upper rail in the closed state, and the second locking mechanism can lock the lower rail in the closed state. Both mechanisms reduce mechanical collision noise, and the locking force is appropriate; a slight increase in pulling force is sufficient to release the lock when the drawer needs to be opened. Buffer blocks are provided at both ends of the first and second ball bearing assemblies, reducing mechanical noise during limiting at both ends. The first and second limiting mechanisms in this design are optional, with or without protective sleeves (referring to the first and second limiting blocks). Adding rubber sleeves further reduces noise when opening and closing the drawer, providing a more comfortable user experience. Multiple auxiliary mounting holes on the upper rail, composite rail, ball bearing holder, and lower rail facilitate screwdriver insertion for tightening screws during three-section slide rail installation. The adjustment mechanism on the upper rail allows for adjustment of the installation gap between the three-section slide rail and the drawer frame. In summary, this design is rationally and thoughtfully crafted, flexible and convenient to use, with low mechanical noise and a good user experience. The three-section slide rail offers advantages such as extended drawer opening travel and improved stability and structural strength through the overlapping area of ​​the three sections. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of the improved three-section slide rail of this utility model;

[0022] Figure 2 This is a cross-sectional structural diagram of the improved three-section slide rail of this utility model;

[0023] Figure 3 This is a structural diagram of the improved three-section slide rail of this utility model in its open state;

[0024] Figure 4 This is a side view of the improved three-section slide rail of this utility model in the closed state;

[0025] Figure 5 This is an exploded view of the improved three-section slide rail of this utility model;

[0026] Figure 6 This is a cross-sectional view of the composite rail of this utility model;

[0027] Figure 7 This is a structural diagram of the rubber sleeve of this utility model;

[0028] Figure 8 This is a structural diagram of the buffer block of this utility model;

[0029] Figure 9 This is a structural diagram of the ball bearing cage of this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10-Upper rail, 100-Mounting auxiliary hole, 101-Screw hole, 102-Boss, 103-Archive wall, 11-First locking plate, 12-First locking sleeve, 13-First limiting block, 14-First protective sleeve, 20-Composite rail, 21-Upper inner rail, 211-Third limiting block, 212-Concave wall, 22-Lower inner rail, 221-Fourth limiting block, 30-Lower rail, 301-Second screw hole, 31-Second locking plate, 32-Second locking sleeve, 33-Second limiting block, 34-Second protective sleeve, 40-Ball bearing holder, 401-Toothed opening, 41-Toothed block, 42-Ball, 43-Buffer block, 430-Slot, 431-Archive ear, 432-Cavity. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] Example 1:

[0034] like Figures 1 to 9 As shown, the improved three-section slide rail includes an upper rail 10, a lower rail 30, and a composite rail 20 disposed between the upper rail and the lower rail 30. A first ball bearing assembly is disposed between the composite rail 20 and the upper rail 10, and a second ball bearing assembly is disposed between the composite rail 20 and the lower rail 30. A first locking mechanism is disposed between the lower right side of the upper rail 10 and the upper right side of the composite rail 20, and a first limiting mechanism is disposed near the lower left side of the upper rail 10. A second locking mechanism is disposed between the upper left side of the lower rail 30 and the lower left side of the composite rail 20, and a second limiting mechanism is disposed near the upper right side of the lower rail 30. A first installation auxiliary mechanism is disposed on the upper rail 10, a second installation auxiliary mechanism is disposed on the lower rail 30, and a third installation auxiliary mechanism is disposed on the composite rail 20, the first ball bearing assembly, and the second ball bearing assembly. An adjustment mechanism is also disposed on the upper rail 10.

[0035] Specifically, the composite rail 20 includes an upper inner rail 21 and a lower inner rail 22 fixedly connected back-to-back to the upper inner rail 21. A third limiting mechanism is provided near the right end of the upper inner rail 21, and a fourth limiting mechanism is provided near the left end of the lower inner rail 22. The upper inner rail 21 and the lower inner rail 22 are welded or riveted together.

[0036] Specifically, the first locking mechanism includes a first locking plate 11 vertically disposed on the lower right side of the upper rail 10 and a first locking sleeve 12 fitted onto the first locking plate 11. The first locking sleeve 12 can lock the locking port at the right end of the upper inner rail 21 (locked when the slide rail is closed). The first locking plate 11 is formed by bending a portion of the upper rail 10. The first locking sleeve 12 is a rubber sleeve. The rubber sleeve and the first locking plate 11 are tightly fitted together.

[0037] Specifically, the second locking mechanism includes a second locking plate 31 vertically disposed on the upper left side of the lower rail 30 and a second locking sleeve 32 fitted onto the second locking plate 31. The second locking sleeve 32 can lock the locking port at the left end of the lower inner rail 22 (locked when the slide rail is closed). The second locking plate 31 is formed by bending a portion of the lower rail 30. The second locking sleeve 32 is a rubber sleeve. The rubber sleeve and the second locking plate 31 are tightly fitted together.

[0038] The first lock sleeve 12 and the second lock sleeve 32 in this solution have the same structure. Their ends are concave arc-shaped and their sides are arc-shaped. This structure can improve the ability to lock the lock, while also having better elasticity and being more conducive to unlocking.

[0039] Specifically, the first ball assembly is located between the upper inner rail 21 and the upper rail 10, and includes a ball carrier 40 and balls 42 disposed in toothed blocks 41 on both sides of the ball carrier 40. The third limiting mechanism is a third limiting block 211, which can abut against and limit the right end of the first ball assembly, i.e., the ball carrier 40. The third limiting block 211 is formed by bending a portion of the upper inner rail 21.

[0040] Specifically, the second ball assembly is located between the lower inner rail 22 and the lower rail 30, and includes a ball carrier 40 and balls 42 disposed in toothed blocks 41 on both sides of the ball carrier 40. The fourth limiting mechanism is a fourth limiting block 221, which can abut against and limit the left end of the second ball assembly, i.e., the ball carrier 40. The fourth limiting block 221 is formed by bending a portion of the lower inner rail 22.

[0041] Specifically, the toothed block 41 accommodates one ball 42 per tooth. This structure reduces the weight of the ball carrier 40, saves material costs, improves the elasticity of the ball carrier 40, better adapts to the use of the ball 42 and the slide rail, and has the effect of adjusting the flatness error of the slide rail contact surface and reducing vibration. A buffer block 43 is provided at each of the left and right ends of the ball carrier 40. The buffer block 43 has slots 430 on both sides (the slots 430 match the tooth openings 401 at the left and right ends of the ball carrier 40), and two outwardly protruding arc-shaped ears 431 are provided at its outer end. The inner side of the arc-shaped ears 431 has two hollowed-out cavities 432. The contact points of the two arc-shaped ears 431 can distribute the force and are more wear-resistant and durable. The two hollowed-out cavities 432, together with the two arc-shaped ears 431, have a better elastic buffering effect and can effectively reduce mechanical collision noise. Preferably, the buffer block 43 is made of rubber.

[0042] The ball bearing 42 is matched with and rolls along the inner side of the arched wall 103 on both sides of the upper rail 10 and the lower rail 30, and along the outer side of the concave wall 212 on both sides of the upper inner rail 21 and the lower inner rail 22.

[0043] Specifically, the first limiting mechanism includes a first limiting block 13 vertically disposed on the upper rail 10 and a first protective sleeve 14 sleeved on the first limiting block 13. The first protective sleeve 14 can abut against and limit the left end (i.e., buffer block 43) of the first ball assembly. The first limiting block 13 is formed by bending a portion of the upper rail 10. The second limiting mechanism includes a second limiting block 33 vertically disposed on the lower rail 30 and a second protective sleeve 34 sleeved on the second limiting block 33. The second protective sleeve 34 can abut against and limit the right end (i.e., buffer block 43) of the second ball assembly. The second limiting block 33 is formed by bending a portion of the lower rail 30. The main function of the first limiting block 13 is to limit the upper rail 10 when the slide rail is open, and the main function of the second limiting block 33 is to limit the lower rail 30 when the slide rail is open, which also limits the composite rail when it is open.

[0044] The first sheath 14 and the second sheath 34 in this design have the same structure and are both made of rubber.

[0045] Specifically, the first installation auxiliary mechanism consists of multiple installation auxiliary holes 100 provided on the upper rail 10, and the second installation auxiliary mechanism consists of multiple installation auxiliary holes 100 provided on the lower rail 30. The third installation auxiliary mechanism consists of multiple installation auxiliary holes 100 respectively provided on the composite rail 20, the first ball assembly, and the second ball assembly (i.e., the ball frame 40).

[0046] Specifically, the adjustment mechanism is an upwardly protruding rectangular boss 102 located around the screw holes 101 of the upper rail 10. The boss 102 is used to adjust the installation gap between the upper rail 10 and the drawer frame.

[0047] The lower rail 30 is also provided with multiple second screw holes 301.

[0048] The assembly process of this solution is briefly described as follows: (Note: Do not bend the first locking plate 11 and the second locking plate 31 before assembly)

[0049] (1) The assembly sequence of the composite rail using welded three-section slide rail is as follows: First, weld the upper inner rail 21 and the lower inner rail 22 back to back to form a composite rail. Then, install the buffer block 43 into the left and right ends of the ball frame 40. The first protective sleeve 14 is fitted onto the first limiting block 13, and the second protective sleeve 34 is fitted onto the second limiting block 33. The first ball assembly is installed into the right side of the first limiting block 13 of the upper rail 10. The left end of the upper inner rail 21 is installed from the right end of the upper rail 10 and cooperates with the first ball assembly. The second ball assembly is installed into the left side of the second limiting block 33 of the lower rail 30. The right end of the lower inner rail 22 is installed from the left end of the lower rail 30 and cooperates with the second ball assembly. Then, the first locking plate 11 and the second locking plate 31 are bent into shape and fitted with the first locking sleeve 12 and the second locking sleeve 32 respectively.

[0050] (2) The assembly sequence of the composite rail using riveted three-section slide rail is as follows: insert the buffer block 43 into the left and right ends of the ball frame 40, put the first protective sleeve 14 on the first limiting block 13, put the second protective sleeve 34 on the second limiting block 33, insert the first ball assembly into the right side of the first limiting block 13 of the upper rail 10, insert the left end of the upper inner rail 21 from the right end of the upper rail 10 and cooperate with the first ball assembly, insert the second ball assembly into the left side of the second limiting block 33 of the lower rail 30, insert the right end of the lower inner rail 22 from the left end of the lower rail 30 and cooperate with the second ball assembly, then rivet the upper inner rail 21 and the lower inner rail 22 back to back, then bend the first locking plate 11 and the second locking plate 31 into shape, and put the first locking sleeve 12 and the second locking sleeve 32 on respectively.

[0051] Example 2:

[0052] To reduce costs, in this embodiment 2, based on embodiment 1, the first sheath 14 of the upper rail 10 and the second sheath 34 of the lower rail 30 are omitted. Since buffer blocks 43 are provided at both ends of the first and second ball bearing assemblies, they still have the dual functions of noise reduction and buffering when they collide with the first limiting block 13, the second limiting block 33, the third limiting block 211, and the fourth limiting block 221, thus not affecting the user's use. The rest is the same as in embodiment 1 and will not be repeated here.

[0053] In summary, the technical solution of this utility model has the following beneficial effects:

[0054] This invention solves the problems of the prior art's "three-section synchronous drawer slide" where the limiting blocks scratch the middle rail and create resistance, and the middle and lower rail protrusions experience high resistance, inflexibility, and wear over time. The present invention utilizes a ball bearing and sliding structure for all slides between the upper and upper inner rails, and between the lower inner and lower rails. This results in minimal resistance, high flexibility, and ease of use for the three-section slide, completely avoiding the shortcomings of the prior art. The first locking mechanism of this invention can lock the upper rail in the closed state, and the second locking mechanism can lock the lower rail in the closed state. Both mechanisms reduce mechanical collision noise, and the locking force is appropriate; a slight increase in pulling force is sufficient to release the lock when the drawer needs to be opened. Buffer blocks are provided at both ends of the first and second ball bearing assemblies, reducing mechanical noise during limiting at both ends. The first and second limiting mechanisms in this design are optional, with or without protective sleeves (referring to the first and second limiting blocks). Adding rubber sleeves further reduces noise when opening and closing the drawer, providing a more comfortable user experience. Multiple auxiliary mounting holes on the upper rail, composite rail, ball bearing holder, and lower rail facilitate screwdriver insertion for tightening screws during three-section slide rail installation. The adjustment mechanism on the upper rail allows for adjustment of the installation gap between the three-section slide rail and the drawer frame. In summary, this design is rationally and thoughtfully crafted, flexible and convenient to use, with low mechanical noise and a good user experience. The three-section slide rail offers advantages such as extended drawer opening travel and improved stability and structural strength through the overlapping area of ​​the three sections.

[0055] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. An improved three-section slide rail, characterized by: The system includes an upper rail, a lower rail, and a composite rail disposed between the upper and lower rails. A first ball bearing assembly is disposed between the composite rail and the upper rail, and a second ball bearing assembly is disposed between the composite rail and the lower rail. A first locking mechanism is disposed between the lower right side of the upper rail and the upper right side of the composite rail, and a first limiting mechanism is disposed near the lower left side of the upper rail. A second locking mechanism is disposed between the upper left side of the lower rail and the lower left side of the composite rail, and a second limiting mechanism is disposed near the upper right side of the lower rail. A first installation auxiliary mechanism is disposed on the upper rail, a second installation auxiliary mechanism is disposed on the lower rail, and a third installation auxiliary mechanism is disposed on the composite rail, the first ball bearing assembly, and the second ball bearing assembly. An adjustment mechanism is also disposed on the upper rail.

2. The improved three-section slide rail according to claim 1, wherein: The composite rail includes an upper inner rail and a lower inner rail fixedly connected back-to-back with the upper inner rail. A third limiting mechanism is provided near the right end of the upper inner rail, and a fourth limiting mechanism is provided near the left end of the lower inner rail.

3. The improved three-section slide rail according to claim 2, wherein: The first locking mechanism includes a first locking plate vertically disposed on the lower right side of the upper rail and a first locking sleeve fitted on the first locking plate. The first locking sleeve can lock the locking port at the right end of the upper inner rail.

4. The improved three-section slide rail according to claim 2, wherein: The second locking mechanism includes a second locking plate vertically disposed on the upper left side of the lower rail and a second locking sleeve fitted on the second locking plate. The second locking sleeve can lock the locking port at the left end of the lower inner rail.

5. The improved three-section slide rail according to claim 2, wherein: The first ball assembly is located between the upper inner rail and the upper rail, and includes a ball frame and balls disposed in toothed blocks on both sides of the ball frame; the third limiting mechanism can abut against and limit the right end of the first ball assembly.

6. The improved three-section slide rail according to claim 2, wherein: The second ball assembly is located between the lower inner rail and the lower rail, and includes a ball frame and balls disposed in toothed blocks on both sides of the ball frame; the fourth limiting mechanism can abut against and limit the left end of the second ball assembly.

7. The improved three-section slide rail according to any one of claims 5 or 6, characterized in that: The toothed block has one tooth that accommodates one ball; a buffer block is provided at each of the left and right ends of the ball holder.

8. The improved three-section slide rail according to claim 1, characterized in that: The first limiting mechanism includes a first limiting block vertically disposed on the upper rail and a first protective sleeve sleeved on the first limiting block. The first protective sleeve can abut against and limit the left end of the first ball assembly. The second limiting mechanism includes a second limiting block vertically disposed on the lower rail and a second protective sleeve sleeved on the second limiting block. The second protective sleeve can abut against and limit the right end of the second ball assembly.

9. The improved three-section slide rail according to claim 1, characterized in that: The first installation auxiliary mechanism consists of multiple installation auxiliary holes on the upper rail, the second installation auxiliary mechanism consists of multiple installation auxiliary holes on the lower rail, and the third installation auxiliary mechanism consists of multiple installation auxiliary holes respectively on the composite rail, the first ball bearing assembly, and the second ball bearing assembly.

10. The improved three-section slide rail according to claim 1, characterized in that: The adjustment mechanism is an upwardly protruding rectangular boss located around the screw holes of the upper rail, used to adjust the installation gap between the upper rail and the drawer frame.

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