Three-section drawer sliding rail

Abstract

The three-section drawer sliding rail comprises a fixed rail, a middle rail and a movable rail, the middle rail is provided with a first guide part and a second guide part, the first guide part is movably matched with the fixed rail, the second guide part is movably matched with the movable rail, and a first ball assembly is arranged between the first guide part and the fixed rail; and a second ball assembly is arranged between the second guide part and the movable rail. The three-section drawer sliding rail has the advantages that the structure of cross matching and three-face ball matching is adopted, matching between the fixed rail and the middle rail and matching between the middle rail and the movable rail are more stable and reliable, the gravity centers of the movable rail and the middle rail coincide with the center of the fixed rail, the overall strength of the sliding rail is effectively enhanced, and the service life of the sliding rail is prolonged. And the sliding rails operate more stably and smoothly, so that the drawer can be pushed and pulled more stably and smoothly. In the using process, the sliding rail is not prone to bending deformation, and the bending resistance and the bearing capacity of the sliding rail are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of furniture, relates to a furniture accessory, and particularly relates to a three-section drawer slide rail for furniture. Background Art

[0002] As an important component for installing drawers in furniture and enabling the drawers to move in and out, common types of drawer slide rails include two-section drawer slide rails and three-section drawer slide rails. Among them, the two-section drawer slide rail has the limitation that the drawer cannot be pulled out integrally during use, while the three-section drawer slide rail can pull the drawer out integrally and is more widely used.

[0003] Currently, the existing three-section drawer slide rail, such as the Chinese utility model patent with the application number 2018210648245 and the patent name of a three-section drawer slide rail assembly, has obvious deficiencies. The overall strength of this existing three-section drawer slide rail is small, and the centers of gravity of the movable rail and the middle rail do not coincide with the center of the supporting vertical plate of the fixed rail (the vertical plate for supporting the middle rail and the movable rail). This non-coincident structural design causes the supporting vertical plate to be unevenly stressed when bearing the weight of the drawer and external forces during use, easily resulting in bending deformation, and further leading to poor bending resistance and load-bearing capacity, which cannot meet the requirements of users for high-load-bearing furniture hardware accessories, greatly affecting the service life of the drawer slide rail. Therefore, there is an urgent need for a three-section drawer slide rail that can overcome the above defects. Summary of the Invention

[0004] The purpose of the present invention is to provide a three-section drawer slide rail to solve the problems of small overall strength, poor bending resistance and load-bearing capacity of the existing three-section drawer slide rail.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a three-section drawer slide rail, including a fixed rail, a middle rail, and a movable rail. The middle rail is provided with a first guiding portion and a second guiding portion. The first guiding portion is movably matched with the fixed rail, and the second guiding portion is movably matched with the movable rail. A first ball assembly is provided between the first guiding portion and the fixed rail, and a second ball assembly is provided between the second guiding portion and the movable rail;

[0006] A first accommodating position, a second accommodating position, and a third accommodating position are sequentially provided between the first guiding portion and the fixed rail. The first ball assembly is provided with a first ball, a second ball, and a third ball, and the first ball, the second ball, and the third ball are respectively located in the first accommodating position, the second accommodating position, and the third accommodating position;

[0007] A fourth receiving position, a fifth receiving position, and a sixth receiving position are sequentially provided between the second guiding portion and the movable rail. The second ball assembly is provided with a fourth ball, a fifth ball, and a sixth ball, and the fourth ball, the fifth ball, and the sixth ball are respectively located in the fourth receiving position, the fifth receiving position, and the sixth receiving position.

[0008] Further, the fixed rail is provided with a first guiding groove, and the first guiding portion is engaged with the first guiding groove. The first guiding portion can slide along the first guiding groove. The first guiding portion is sequentially provided with a concave first arc portion, a second arc portion, a third arc portion, and a fourth arc portion. The first arc portion, the second arc portion, and the third arc portion respectively form the first receiving position, the second receiving position, and the third receiving position with the fixed rail.

[0009] The movable rail is provided with a second guiding groove. The second guiding portion is sequentially provided with a concave fifth arc portion, a sixth arc portion, a seventh arc portion, and an eighth arc portion. The fifth arc portion, the sixth arc portion, and the seventh arc portion respectively form the fourth receiving position, the fifth receiving position, and the sixth receiving position with the movable rail.

[0010] Further, the outer shapes of the first guiding portion and the second guiding portion are both in a "cross" shape. One end of the first arc portion is connected to one end of the second arc portion, one end of the third arc portion is connected to the other end of the second arc portion, one end of the fourth arc portion is connected to the other end of the third arc portion, the other end of the fourth arc portion is connected to one end of the fifth arc portion, the other end of the fifth arc portion is connected to one end of the sixth arc portion, the other end of the sixth arc portion is connected to one end of the seventh arc portion, the other end of the seventh arc portion is connected to one end of the eighth arc portion, and the other end of the eighth arc portion corresponds to one end of the first arc portion.

[0011] Further, both the first guiding portion and the second guiding portion are of a hollow structure.

[0012] Further, the first ball assembly includes a first ball holder, and the first ball holder is sequentially provided with a first ball groove, a second ball groove, and a third ball groove. The first ball, the second ball, and the third ball are respectively installed in the first ball groove, the second ball groove, and the third ball groove. The second ball assembly includes a second ball holder, and the second ball holder is sequentially provided with a fourth ball groove, a fifth ball groove, and a sixth ball groove. The fourth ball, the fifth ball, and the sixth ball are respectively installed in the fourth ball groove, the fifth ball groove, and the sixth ball groove.

[0013] Further, the outer shapes of the first ball holder and the second ball holder are both in a "C" shape.

[0014] Further, a buffer is provided on the fixed rail, and the output end of the buffer is connected to the movable rail.

[0015] Further, the three-section drawer slide rail further includes a locking handle, and the locking handle includes a height adjustment mechanism, a left-right adjustment mechanism, a locking mechanism, and a toggle unlocking mechanism provided on the body;

[0016] The output end of the height adjustment mechanism is provided with a push block, the push block is provided with a pushing surface, the output end of the left-right adjustment mechanism is provided with an insertion block, the locking mechanism includes an elastic member and a lock block provided with a card slot, the lock block can make a telescopic movement on the body, the elastic member is connected to the lock block, and in the natural state, the elastic member applies an elastic force to the lock block to make the lock block protrude, the toggle unlocking mechanism includes a toggle rod, the toggle rod is hinged to the body, the toggle rod is provided with a toggle block, the toggle block is connected to the lock block, and when the toggle rod is toggled, the lock block retracts to realize the unlocking function.

[0017] Further, the pushing surface is an inclined surface, the body is provided with a first guiding groove, the push block is matched with the first guiding groove, the push block can slide back and forth along the first guiding groove, the height adjustment mechanism includes a first screw rod and a first adjusting wheel, one end of the first screw rod is connected to the push block, the body is provided with a first receiving groove, the first adjusting wheel is rotatably installed in the first receiving groove, and the first adjusting wheel is in threaded cooperation with the first screw rod; the body is provided with a second guiding groove, the left-right adjustment mechanism includes a slider, a second screw rod and a second adjusting wheel, the insertion block is arranged on the slider, one end of the insertion block extends out of the outside of the body, the slider is installed in the second guiding groove, the slider can slide left and right along the second guiding groove, one end of the second screw rod is connected to the slider, the body is provided with a second receiving groove, the second adjusting wheel is rotatably installed in the second receiving groove, and the second adjusting wheel is in threaded cooperation with the second screw rod.

[0018] Further, the body is provided with a third guiding groove, the lock block is matched with the third guiding groove, the lock block can slide along the third guiding groove, the elastic member is a spring, one end of the spring is connected to the lock block, and the other end is connected to the body. In the natural state, the spring is in a compressed state, and the spring applies an elastic force to the lock block to make the lock block protrude.

[0019] Advantages of the present invention: Compared with the existing three - section drawer slide rail, the present invention has significant advantages and beneficial effects. Due to the adoption of the cross - shaped fit and the three - sided ball fit structure, the fit between the fixed rail and the middle rail, and between the middle rail and the movable rail is more stable and reliable, making the centers of gravity of the movable rail and the middle rail coincide with the center of the fixed rail. Therefore, the overall strength of the slide rail is effectively enhanced, the operation of the slide rail is more stable and smooth, and further the pushing and pulling of the drawer is more stable and smooth. During use, the slide rail is not easily bent or deformed, greatly improving the bending resistance of the slide rail. At the same time, the uniform force distribution also improves the load - bearing capacity of the slide rail, can meet the needs of users to place more and heavier items, extends the service life of the drawer slide rail, and brings a better quality and stable use experience to users. Brief Description of the Drawings

[0020] Figure 1 is the first three - dimensional view of the three - section drawer slide rail according to the embodiment of the present invention.

[0021] Figure 2 is the second three - dimensional view of the three - section drawer slide rail according to the embodiment of the present invention.

[0022] Figure 3 is the front view of the three - section drawer slide rail according to the embodiment of the present invention.

[0023] Figure 4 is Figure 3 the bottom view of

[0024] Figure 5 is the structural schematic diagram of the three - section drawer slide rail according to the embodiment of the present invention when the movable rail is removed.

[0025] Figure 6 is Figure 5 the view in the direction of arrow A in

[0026] Figure 7 is the structural schematic diagram of the three - section drawer slide rail according to the embodiment of the present invention when the fixed rail is removed.

[0027] Figure 8 is Figure 7 the view in the direction of arrow B in

[0028] Figure 9 is the front view of the middle rail according to the embodiment of the present invention.

[0029] Figure 10 is the three - dimensional view of the middle rail according to the embodiment of the present invention.

[0030] Figure 11 is the structural schematic diagram when the first ball holder is fitted with the middle rail.

[0031] Figure 12 is Figure 11 the view in the direction of arrow C in

[0032] Figure 13 It is a perspective view of the first ball cage.

[0033] Figure 14 It is a schematic structural view when the second ball cage is engaged with the middle rail.

[0034] Figure 15 It is Figure 14 The view in the direction of arrow D.

[0035] Figure 16 It is a perspective view of the second ball cage.

[0036] Figure 17 It is a schematic structural view of the three - section drawer slide rail according to the embodiment of the present invention when the end cap is fixed to the movable rail.

[0037] Figure 18 It is the first perspective view of the locking handle according to the embodiment of the present invention.

[0038] Figure 19 It is the second perspective view of the locking handle according to the embodiment of the present invention.

[0039] Figure 20 It is the front view of the locking handle according to the embodiment of the present invention.

[0040] Figure 21 It is Figure 20 The rear view of

[0041] Figure 22 It is the first schematic structural view of the locking handle according to the embodiment of the present invention when the body is removed.

[0042] Figure 23 It is the second schematic structural view of the locking handle according to the embodiment of the present invention when the body is removed.

[0043] Figure 24 It is a schematic structural view of the height - adjusting mechanism according to the embodiment of the present invention.

[0044] Figure 25 It is a schematic structural view when the locking handle is installed on the movable rail.

[0045] Explanation of reference numerals:

[0046] Fixed rail 1, movable rail 2, middle rail 3, buffer 4, first ball cage 5, second ball cage 6, end cap 7, locking handle 8;

[0047] First guiding groove 11, fixing plate 12;

[0048] Mounting hole 121;

[0049] Second guiding groove 21, clamping edge 22, inserting edge 23, connecting block 24;

[0050] A first guide portion 31 and a second guide portion 32;

[0051] A first arc portion 311, a second arc portion 312, a third arc portion 313, and a fourth arc portion 314;

[0052] a fifth arc-shaped portion 321 , a sixth arc-shaped portion 322 , a seventh arc-shaped portion 323 , and an eighth arc-shaped portion 324 ;

[0053] A first ball groove 51, a second ball groove 52, and a third ball groove 53;

[0054] Fourth ball groove 61, fifth ball groove 62, sixth ball groove 63;

[0055] mating surface 71, slot 72;

[0056] Main body 81, height adjustment mechanism 82, left and right adjustment mechanism 83, locking mechanism 84, toggle unlocking mechanism 85;

[0057] Mounting hole 811, first receiving groove 812, second receiving groove 813;

[0058] Push block 821, first screw rod 822, first adjusting wheel 823;

[0059] Pushing surface 8211;

[0060] Slider 831, second screw 832, second adjusting wheel 833;

[0061] Insert 8311, elastic edge 8312;

[0062] Lock block 841;

[0063] Card slot 8411, set hole 8412, groove 8413;

[0064] lever 851;

[0065] Shift block 8511 and shift portion 8512. DETAILED DESCRIPTION

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0067] like Figures 1-4As shown, the three - section drawer slide of this embodiment includes a fixed rail 1, a middle rail 3, and a movable rail 2. The middle rail 3 is movably connected to the fixed rail 1 and the movable rail 2 respectively. The fixed rail 1 is fixedly installed on the furniture main body, and the drawer is installed on the movable rail 2. Refer to Figure 5 and Figure 6 , a first guiding groove 11 is machined on the fixed rail 1. The first guiding groove 11 penetrates in the length direction of the fixed rail 1. An L - shaped fixing plate 12 is also machined on the fixed rail 1, and a plurality of mounting holes 121 are machined on the fixing plate 12. Refer to Figure 7 and Figure 8 , a second guiding groove 21 is machined on the movable rail 2. The second guiding groove 21 penetrates in the length direction of the movable rail 2. A clamping edge 22, an inserting edge 23, and a connecting block 24 are also machined on the movable rail 2. The clamping edge 22 and the inserting edge 23 are respectively close to both ends of the movable rail 2, and one end of the clamping edge 22 has an outward - protruding structure. A buffer 4 is installed on the fixed rail 1, and the output end of the buffer 4 is connected to the connecting block 24 of the movable rail 2.

[0068] Refer to Figure 9 and Figure 10 , a first guiding portion 31 and a second guiding portion 32 are respectively machined on the middle rail 3. The second guiding portion 32 is located above the first guiding portion 31. The first guiding portion 31 and the second guiding portion 32 are symmetrically structured up and down. The outer shapes of the first guiding portion 31 and the second guiding portion 32 are both in a "cross" shape, and both the first guiding portion 31 and the second guiding portion 32 are hollow structures.

[0069] Along the Figure 9 direction of arrow E on the first guiding portion 31, an inward - concave first arc portion 311, a second arc portion 312, a third arc portion 313, and a fourth arc portion 314 are successively machined. Along the Figure 9 direction of arrow F on the second guiding portion 32, an inward - concave fifth arc portion 321, a sixth arc portion 322, a seventh arc portion 323, and an eighth arc portion 324 are successively machined. One end of the first arc portion 311 is connected to one end of the second arc portion 312. One end of the third arc portion 313 is connected to the other end of the second arc portion 312. One end of the fourth arc portion 314 is connected to the other end of the third arc portion 313. The other end of the fourth arc portion 314 is connected to one end of the fifth arc portion 321. The other end of the fifth arc portion 321 is connected to one end of the sixth arc portion 322. The other end of the sixth arc portion 322 is connected to one end of the seventh arc portion 323. The other end of the seventh arc portion 323 is connected to one end of the eighth arc portion 324. The other end of the eighth arc portion 324 corresponds to and is separated from one end of the first arc portion 311.

[0070] The first guiding part 31 is in clearance fit with the first guiding groove 11 of the fixed rail 1. The first guiding part 31 can slide along the first guiding groove 11. A first accommodating position, a second accommodating position and a third accommodating position are respectively formed between the first arc part 311, the second arc part 312 and the third arc part 313 and the fixed rail 1. Refer to Figure 6 , a first ball component is installed between the first guiding part 31 and the fixed rail 1. The first ball component includes a first ball holder 5 with a "C"-shaped outer contour. When the first ball holder 5 cooperates with the first guiding part 31 of the middle rail 3, as shown in Figure 11 and Figure 12 . Refer to Figure 13 , a first ball groove 51, a second ball groove 52 and a third ball groove 53 are successively machined on the first ball holder 5. A first ball, a second ball and a third ball (not shown in the drawings) are respectively installed in the first ball groove 51, the second ball groove 52 and the third ball groove 53. When the first ball component is installed between the first guiding part 31 and the fixed rail 1, the first ball, the second ball and the third ball are respectively located in the first accommodating position, the second accommodating position and the third accommodating position.

[0071] The second guiding part 32 is in clearance fit with the second guiding groove 21 of the movable rail 2. The second guiding part 32 can slide along the second guiding groove 21. A fourth accommodating position, a fifth accommodating position and a sixth accommodating position are respectively formed between the fifth arc part 321, the sixth arc part 322 and the seventh arc part 323 and the movable rail 2. Refer to Figure 8 , a second ball component is installed between the second guiding part 32 and the movable rail 2. The second ball component includes a second ball holder 6 with a "C"-shaped outer contour. When the second ball holder 6 cooperates with the second guiding part 32 of the middle rail 3, as shown in Figure 14 and Figure 15 . Refer to Figure 16 , a fourth ball groove 61, a fifth ball groove 62 and a sixth ball groove 63 are successively machined on the second ball holder 6. A fourth ball, a fifth ball and a sixth ball (not shown in the drawings) are respectively installed in the fourth ball groove 61, the fifth ball groove 62 and the sixth ball groove 63. When the second ball component is installed between the second guiding part 32 and the movable rail 2, the fourth ball, the fifth ball and the sixth ball are respectively located in the fourth accommodating position, the fifth accommodating position and the sixth accommodating position.

[0072] Refer to Figure 17 , one end of the movable rail 2 is inserted with an end cap 7, and the end cap 7 and the movable rail 2 are fixed to each other. One end of the end cap 41 is machined with a slot 72 and a mating surface 71. The mating surface 71 is located above the slot 72, and the mating surface 71 is an inclined surface.

[0073] The three-section drawer slide rail further includes a locking handle 8. Refer to Figures 18-21, the locking handle 8 includes a body 81, and three mounting holes 811 are machined on the body 81. A height adjustment mechanism 82, a left - right adjustment mechanism 83, a locking mechanism 84, and a toggle unlocking mechanism 85 are mounted on the body 81. The height adjustment mechanism 82 is used to adjust the height of the drawer, the left - right adjustment mechanism 83 is used to adjust the left - right position of the drawer, the locking mechanism 84 is used to fix the locking handle 8 to the three - section drawer slide rail, thereby fixing the drawer to the three - section drawer slide rail, and the toggle unlocking mechanism 85 is used to unlock so that the locking handle 8 can be detached from the three - section drawer slide rail, thereby detaching the drawer from the three - section drawer slide rail.

[0074] Refer to Figures 22-24 , the height adjustment mechanism 82 includes a push block 821 with a pushing surface 8211, a first screw 822, and a first adjusting wheel 823. A first guiding groove is machined on the body 81. The push block 821 is engaged with the first guiding groove, and the push block 821 can slide back and forth along the first guiding groove, that is, the push block 821 can slide along the Figure 21 direction of the E arrow in Figure 19 . A first receiving groove 812 is machined on the body 81. The first adjusting wheel 823 is rotatably mounted in the first receiving groove 812. The first adjusting wheel 823 is in threaded cooperation with the first screw 822. Rotating the first adjusting wheel 823 adjusts the front - rear position of the push block 821. In a preferred design, the first adjusting wheel 823 is a first adjusting gear, and a first threaded hole is machined in the middle of the first adjusting gear. The first threaded hole is in threaded cooperation with the first screw 822. The pushing surface 8211 of the push block 821 is designed as an inclined surface.

[0075] Refer to Figure 22 and Figure 23 , the left - right adjustment mechanism 83 includes a slider 831, a second screw 832, and a second adjusting wheel 833. An insertion block 8311 is machined on the slider 831. A second guiding groove is machined on the body 81. The slider 831 is mounted in the second guiding groove, and the slider 831 can slide left and right along the second guiding groove, that is, the slider 831 can slide along the Figure 4 direction of the F arrow in Figure 22 and Figure 23, on one side of the inserted block 8311 on the slider 831, an elastic edge 8312 is machined, and one end of the elastic edge 8312 extends obliquely outward from the outside of the main body 81.

[0076] The main body 81 is machined with a third guide groove. The locking mechanism 84 includes an elastic member (not shown in the drawing) and a lock block 841 machined with a clamping groove 8411. The lock block 841 can move telescopically on the main body 81, that is, the lock block 841 can move telescopically on the main body 81 along the Figure 21 direction of the F arrow in the figure. The elastic member is designed as a spring. Refer to Figure 22 and Figure 23 , a sleeving hole 8412 is machined on the lock block 841. One end of the spring is sleeved in the sleeving hole 8412, and the other end is connected to the main body 81. In the natural state, the spring is in a compressed state, and the spring applies an elastic force to the lock block 841 to make the lock block 841 extend.

[0077] Refer to Figure 22 and Figure 23 , the toggle unlocking mechanism 85 includes a toggle lever 851. The toggle lever 851 is hingedly connected to the main body 81. One end of the toggle lever 851 is machined with a toggle block 8511. A groove 8413 with a shape of "︹" is machined on one side of the lock block 841, and the toggle block 8511 cooperates with the groove 8413. A toggling portion 8512 is machined on the toggle lever 851. The toggling portion 8512 extends out of the outside of the main body 81, and anti-slip lines are machined on the toggling portion 8512. When the toggling portion 8512 of the toggle lever 851 is toggled along the Figure 21 direction of the G arrow in the figure, the toggle lever 851 drives the lock block 841 to retract to achieve the unlocking function.

[0078] When the locking handle 8 is installed on the movable rail 2 of the drawer slide, as Figure 25 shown. The inserted block 8311 is inserted into the slot 72 of the end cover 7. The pushing surface 8211 of the push block 821 corresponds to and abuts against the mating surface 71 of the end cover 7. The clamping edge 22 cooperates with the clamping groove 8411 of the lock block 841. When the toggling portion 8512 of the toggle lever 851 is toggled along the Figure 21 direction of the G arrow in the figure, the lock block 841 is retracted, and further the clamping edge 22 is disengaged from the clamping groove 8411 to achieve the unlocking function. At this time, the locking handle 8 can be detached from the movable rail 2, and further the drawer can be detached from the three-section drawer slide.

[0079] The principle of the detachable installation of the drawer on the three - section drawer slide rail in this embodiment is as follows: The locking handle 8 is installed at the bottom of the drawer. The insertion edge 23 of the movable rail 2 is inserted into the slot on the back of the drawer. The pin 82 of the locking handle 8 is inserted into the slot 71 of the end cover 7 of the movable rail 2. Moreover, the slot 831 of the clamping block 83 of the locking handle 8 cooperates with the clamping edge 22 of the movable rail 2. At this time, the drawer is installed on the movable rail 2 of the three - section drawer slide rail. When it is necessary to remove the drawer from the three - section drawer slide rail, the lever 851 of the locking handle 8 is toggled, so that the clamping edge 42 of the movable rail 2 is disengaged from the slot 8411 of the locking handle 8. At this time, the drawer can be removed from the three - section drawer slide rail.

[0080] The principle of adjusting the height and left - right position of the drawer is as follows: By rotating the first adjusting wheel 823, the pushing block 821 moves back and forth, thereby adjusting the height of the drawer and realizing the adjustment of the height of the drawer; by rotating the second adjusting wheel 833, the inserting block 8311 moves left and right, thereby adjusting the left - right position of the drawer.

[0081] Compared with the prior art, the advantages of the three - section drawer slide rail of the present invention are as follows:

[0082] 1. The structure of the middle rail is optimized, strengthening the strength of the middle rail itself. The middle rail is provided with a cross - shaped mating and guiding part that cooperates with the fixed rail and the movable rail, enabling the fixed rail, middle rail, and movable rail to achieve precise positioning and stable connection in both horizontal and vertical directions. The center of gravity of the movable rail and the middle rail coincides with the center of the fixed rail, effectively solving the problem that the supporting vertical plate of the existing slide rail is prone to bending deformation, greatly enhancing the overall strength and bending resistance of the slide rail. In actual use, it can bear a heavier drawer load, and even after long - term use, it is not easy to deform or damage, improving the service life and reliability of the product;

[0083] 2. Three - sided ball cooperation is adopted between the mating surfaces of the fixed rail and the middle rail, and between the middle rail and the movable rail. These balls are evenly distributed between the track and the sliding part, forming rolling friction, greatly reducing the friction force during the use of the slide rail, making the pushing and pulling of the drawer smoother and more labor - saving, and enhancing the user experience. At the same time, this design also reduces the wear between components, further extending the service life of the slide rail.

[0084] 3. The three - section drawer slide rail of the present invention is also provided with a quick - release two - dimensional adjustment locking handle, which can facilitate the quick disassembly and assembly of the drawer. The height and left - right position of the drawer can be adjusted through the locking handle, that is, two - dimensional adjustment of the drawer, which is flexible and convenient, and can better meet the diverse adjustment requirements of the drawer position during actual use.

[0085] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A three - section drawer slide rail, comprising a fixed rail (1), an intermediate rail (3) and a movable rail (2). The intermediate rail (3) is provided with a first guiding part (31) and a second guiding part (32). The first guiding part (31) is movably engaged with the fixed rail (1), and the second guiding part (32) is movably engaged with the movable rail (2). A first ball assembly is provided between the first guiding part (31) and the fixed rail (1), and a second ball assembly is provided between the second guiding part (32) and the movable rail (2). It is characterized in that: A first receiving position, a second receiving position and a third receiving position are sequentially provided between the first guiding part (31) and the fixed rail (1). The first ball assembly is provided with a first ball, a second ball and a third ball, and the first ball, the second ball and the third ball are respectively located in the first receiving position, the second receiving position and the third receiving position; A fourth receiving position, a fifth receiving position and a sixth receiving position are sequentially provided between the second guiding part (32) and the movable rail (2). The second ball assembly is provided with a fourth ball, a fifth ball and a sixth ball, and the fourth ball, the fifth ball and the sixth ball are respectively located in the fourth receiving position, the fifth receiving position and the sixth receiving position.

2. The three - section drawer slide according to claim 1, wherein, The fixed rail (1) is provided with a first guiding groove (11). The first guiding part (31) is engaged with the first guiding groove (11), and the first guiding part (31) can slide along the first guiding groove (11). The first guiding part (31) is sequentially provided with an inwardly concave first arc part (311), a second arc part (312), a third arc part (313) and a fourth arc part (314). The first arc part (311), the second arc part (312) and the third arc part (313) respectively form the first receiving position, the second receiving position and the third receiving position with the fixed rail (1); The movable rail (2) is provided with a second guiding groove (21). The second guiding part (32) is sequentially provided with an inwardly concave fifth arc part (321), a sixth arc part (322), a seventh arc part (323) and an eighth arc part (324). The fifth arc part (321), the sixth arc part (322) and the seventh arc part (323) respectively form the fourth receiving position, the fifth receiving position and the sixth receiving position with the movable rail (2).

3. The three-section drawer slide rail according to claim 1, characterized in that, The outer shapes of the first guiding part (31) and the second guiding part (32) are both in a "cross" shape. One end of the first arc part (311) is connected to one end of the second arc part (312). One end of the third arc part (313) is connected to the other end of the second arc part (312). One end of the fourth arc part (314) is connected to the other end of the third arc part (313). The other end of the fourth arc part (314) is connected to one end of the fifth arc part (321). The other end of the fifth arc part (321) is connected to one end of the sixth arc part (322). The other end of the sixth arc part (322) is connected to one end of the seventh arc part (323). The other end of the seventh arc part (323) is connected to one end of the eighth arc part (324). The other end of the eighth arc part (324) corresponds to one end of the first arc part (311).

4. The three-section drawer slide rail according to claim 1 or 2 or 3, characterized in that, Both the first guiding part (31) and the second guiding part (32) are of hollow structures.

5. The three - section drawer slide according to claim 1, wherein, The first ball component includes a first ball holder (5). The first ball holder (5) is successively provided with a first ball groove (51), a second ball groove (52), and a third ball groove (53). The first ball, the second ball, and the third ball are respectively installed in the first ball groove (51), the second ball groove (52), and the third ball groove (53). The second ball component includes a second ball holder (6). The second ball holder (6) is successively provided with a fourth ball groove (61), a fifth ball groove (62), and a sixth ball groove (63). The fourth ball, the fifth ball, and the sixth ball are respectively installed in the fourth ball groove (61), the fifth ball groove (62), and the sixth ball groove (63).

6. The three-section drawer slide according to claim 5, wherein, The outer shapes of the first ball holder (5) and the second ball holder (6) are both in a "C" shape.

7. The three - section drawer slide according to claim 1, wherein, A buffer (4) is provided on the fixed rail (1). The output end of the buffer (4) is connected to the movable rail (2).

8. The three-section drawer slide rail according to claim 1, wherein, The three - section drawer slide rail further includes a locking handle (8). The locking handle (8) includes a height - adjusting mechanism (82), a left - and - right adjusting mechanism (83), a locking mechanism (84), and a toggle unlocking mechanism (85) provided on the body (81). The output end of the height adjustment mechanism (82) is provided with a push block (821), and the push block (821) is provided with a push surface (8211). The output end of the left-right adjustment mechanism (83) is provided with an insert block (8311). The locking mechanism (84) includes an elastic member and a locking block (841) provided with a slot (8411). The locking block (841) can perform telescopic movement on the body (81). The elastic member is connected to the locking block (841) and is naturally In the locked state, the elastic member applies elastic force to the locking block (841) so that the locking block (841) extends. The unlocking mechanism (85) comprises a lever (851), the lever (851) is hingedly connected to the body (81), a lever block (8511) is provided on the lever (851), and the lever block (8511) is connected to the locking block (841). When the lever (851) is toggled, the locking block (841) retracts to realize the unlocking function.

9. The three-section drawer slide rail according to claim 8, characterized in that, The pushing surface (8211) is an inclined surface. The main body (81) is provided with a first guide groove. The pushing block (821) cooperates with the first guide groove. The pushing block (821) can slide forward and backward along the first guide groove. The height adjustment mechanism (82) includes a first screw rod (822) and a first adjusting wheel (823). One end of the first screw rod (822) is connected to the pushing block (821). The main body (81) is provided with a first accommodating groove (812). The first adjusting wheel (823) can be rotatably installed in the first accommodating groove (812). The first adjusting wheel (823) is threadedly engaged with the first screw rod (822). The main body (81) is provided with a second guide groove for left and right adjustment. The mechanism (83) includes a slider (831), a second screw (832) and a second adjusting wheel (833), wherein the insert block (8311) is arranged on the slider (831), one end of the insert block (8311) extends out of the outside of the body (81), the slider (831) is installed in the second guide groove, the slider (831) can slide left and right along the second guide groove, one end of the second screw (832) is connected to the slider (831), a second receiving groove (813) is provided on the body (81), the second adjusting wheel (833) can be rotatably installed in the second receiving groove (813), and the second adjusting wheel (833) is threadedly engaged with the second screw (832).

10. The three - section drawer slide rail according to claim 8, wherein, The body (81) is provided with a third guide groove, the locking block (841) cooperates with the third guide groove, and the locking block (841) can slide along the third guide groove. The elastic member is a spring, one end of the spring is connected to the locking block (841), and the other end is connected to the body (81). In the natural state, the spring is in a compressed state, and the spring applies elastic force to the locking block (841) so that the locking block (841) extends.

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