Sequential movable sliding rail assembly and working method thereof

Abstract

The invention relates to a sequential movable sliding rail assembly and a working method thereof. The sequential movable sliding rail assembly comprises a sliding rail and a sliding rail rear locking device. The sliding rail comprises an inner rail, a middle rail and an outer rail; the sliding rail rear locking device comprises a middle inner rail rear locking device arranged at the rear end of the outer side of the inner rail, a traction block rotationally arranged on the inner side of the middle rail, a locking block rotationally arranged on the outer side of the middle rail and a middle outer rail rear locking device arranged in the middle of the inner side of the outer rail, the rear end of the locking block is provided with a flange, and the front end of the inner side of the traction block extends out of a second straight wall. A guide edge extends out of the rear end of the outer side of the traction block, penetrates through the middle rail and is exposed out of the outer side of the middle rail. The sliding rail rear locking device is arranged, so that the sliding rail can be stably pulled open and closed through an automatic sequential locking function. Due to the locking between the middle rail and the inner rail and the locking between the middle rail and the outer rail, the possibility that the rails are separated from each other in the sliding rail pulling-out process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of slide rails, and in particular to a sequential movable slide rail assembly and a working method thereof. Background Art

[0002] Slide rails are usually installed in the drawer structure of furniture or electrical appliances. The drawer structure includes a cabinet body and a drawer that can be pulled out or pushed in relative to the cabinet body. The outer rails of the slide rails are fixed to the two inner walls of the cabinet body, and the inner rails are fixed to the two sides of the drawer. When the drawer is pulled out, the inner rail drives the middle rail, and the middle rail drives the outer rail, so that the entire slide rail is pulled out. When the drawer is pushed in, the inner rail is pushed in and drives the middle rail to push in until the entire slide rail is closed.

[0003] When this type of multi-section slide rail structure is pulled out or pushed in, the inner rails and the middle rails on both sides have different pulling out and pushing progress, and because the engagement between the sections of the slide rails is not firm, the slide rails are prone to shaking and disengagement during the sliding process.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In view of the deficiencies in the prior art, an embodiment of the present invention discloses a sequential movable slide rail assembly and a working method thereof to solve the problem that the multi-section slide rail is prone to shaking and disengaging during the sliding process.

[0006] The technical solution adopted by the present invention is as follows:

[0007] The sequential movable slide rail assembly comprises a slide rail and a slide rail rear locking device; the slide rail comprises an inner rail, a middle rail slidable relative to the inner rail and an outer rail slidable relative to the middle rail; the slide rail rear locking device comprises a middle inner rail rear locking device arranged at the rear end of the outer side of the inner rail, a traction block rotatably arranged on the inner side of the middle rail, a locking block rotatably arranged on the outer side of the middle rail and a middle outer rail rear locking device arranged at the middle part of the inner side of the outer rail, the rear end of the locking block has a retaining edge, the inner front end of the traction block extends a second straight wall, the outer rear end of the traction block extends a guide edge, the guide edge passes through the middle rail and is exposed on the outer side of the middle rail; when the slide rail is completely From the closed state to the first pulled-out state of the slide rail, the second straight wall is stuck in the middle inner rail rear locking device so that the inner rail is locked with the middle rail; during the transition of the slide rail from the first pulled-out state to the second pulled-out state, the middle outer rail rear locking device contacts the guide edge and pushes the traction block to rotate, so that the second straight wall is disengaged from the middle inner rail rear locking device, and at the same time, the middle outer rail rear locking device contacts the retaining edge and pushes the locking block to rotate, so that the retaining edge is stuck in the middle outer rail rear locking device; from the second pulled-out state of the slide rail to the fully pulled-out state of the slide rail, the retaining edge is stuck in the middle outer rail rear locking device so that the middle rail is locked with the outer rail.

[0008] A further technical solution is that a first straight wall extends from the front end of the inner side of the locking block, and the first straight wall passes through the middle rail and is exposed on the inner side of the middle rail; during the transition of the slide rail between the second pulled-out state and the first pulled-out state, the middle inner rail rear locking device contacts the first straight wall and pushes the locking block to rotate, so that the retaining edge is disengaged from the middle outer rail rear locking device, and at the same time, the middle inner rail rear locking device contacts the second straight wall and pushes the traction block to rotate, so that the second straight wall is stuck in the middle inner rail rear locking device; from the first pulled-out state to the fully closed state of the slide rail, the second straight wall is stuck in the middle inner rail rear locking device so that the inner rail is locked with the middle rail.

[0009] Its further technical solution is that the rear locking device of the middle outer rail comprises a first inclined wall and a second inclined wall extending from the inner surface of the outer rail, and a first notch is provided on the front side of the upper end of the second inclined wall for the retaining edge to be inserted into; the rear locking device of the middle inner rail comprises a third inclined wall and a fourth inclined wall extending from the outer side of the inner rail, and a second notch is provided on the front side of the upper end of the third inclined wall for the second straight wall to be inserted into; the first inclined wall is at a predetermined angle to the moving direction of the slide rail to contact the guide edge and push the traction block to rotate, so that the second straight wall is disengaged from the second notch; the second inclined wall is at a predetermined angle to the moving direction of the slide rail to contact the retaining edge and push the locking block to rotate, so that the retaining edge is inserted into the first notch; the third inclined wall is at a predetermined angle to the moving direction of the slide rail to contact the second straight wall and push the traction block to rotate, so that the second straight wall is inserted into the second notch; the fourth inclined wall is at a predetermined angle to the moving direction of the slide rail to contact the first straight wall and push the locking block to rotate, and the retaining edge is disengaged from the first notch.

[0010] Its further technical solution is that the traction block is located at the front end of the locking block; the middle inner rail rear locking device also includes a first reset spring piece, the first reset spring piece is arranged on the outer side of the middle rail, the front end of the first reset spring piece has a second elastic wall, and the second elastic wall elastically contacts the lower end of the guide edge; the rear end of the first reset spring piece has a first elastic wall, and the first elastic wall elastically contacts the upper end of the retaining edge.

[0011] A further technical solution is that the inner rail is provided with a first through hole and a second through hole, the first straight wall passes through the first through hole and slides in the first through hole, the guide edge passes through the second through hole and slides in the second through hole, the inner side of the second elastic wall has a third elastic wall extending into the second through hole, and the third elastic wall is supported on the lower end of the guide edge.

[0012] Its further technical solution is that the sequential movable slide rail assembly also includes a slide rail front locking device; the slide rail front locking device includes a middle inner rail front locking device arranged at the front end of the inner side of the middle rail, a locking block A arranged in the middle of the outer side of the inner rail, and a locking block B arranged in the middle of the outer side of the inner rail and capable of sliding relative to the inner rail in a direction perpendicular to the movement of the slide rail; when the slide rail is fully pulled out, the middle inner rail front locking device contacts the locking block B and can be stuck between the locking block A and the locking block B after pushing away the locking block B, so that the middle rail is locked with the inner rail.

[0013] Its further technical solution is that the front locking device of the slide rail includes a push rod and a push block; the push block is slidably arranged at the front end of the outer side of the inner rail, the front end of the push rod is fixed to the push block, and the rear end of the push rod is provided with a push surface for pushing the lock block B so that the front locking device of the middle inner rail is disengaged from between the lock block A and the lock block B, so that the middle rail and the inner rail are unlocked.

[0014] Its further technical solution is that the front locking device of the slide rail includes a sliding seat; the locking block B can slide in the slideway of the sliding seat; the front locking device of the middle inner rail can contact and push the locking block B from the front end of the slideway; the front locking device of the slide rail also includes a second reset spring sheet, and the lower end of the second reset spring sheet is in elastic contact with the locking block B.

[0015] The present invention also discloses a working method of a sequential movable slide rail assembly implemented by the aforementioned sequential movable slide rail assembly, comprising a slide rail opening step and a slide rail closing step; the slide rail opening step comprises:

[0016] When the slide rail is in a fully closed state, the second straight wall is clamped in the middle inner rail rear locking device so that the inner rail is locked with the middle rail;

[0017] The slide rail changes from the fully closed state to the first pulled-out state: the middle rail and the inner rail are pulled out simultaneously until the guide edge and the retaining edge contact the rear locking device of the middle and outer rails;

[0018] The slide rail changes from the first pulled-out state to the second pulled-out state: the second straight wall stuck in the middle inner rail rear locking device is disengaged from the middle inner rail rear locking device, the inner rail is unlocked from the middle rail, the retaining edge is stuck in the middle outer rail rear locking device, and the middle rail is locked from the outer rail;

[0019] The slide rail changes from the second pulled-out state to the slide rail fully opened state: the inner rail continues to be pulled out until the slide rail is fully opened;

[0020] The closing step of the slide rail comprises:

[0021] The slide rail is transformed from the fully opened state to the second pulled-out state by pushing the inner rail in until the first straight wall and the second straight wall contact the middle inner rail rear locking device;

[0022] The slide rail changes from the second pull-out state to the first pull-out state: the retaining edge stuck in the middle outer rail rear locking device is disengaged from the middle outer rail rear locking device, and the outer rail is unlocked from the middle rail; the second straight wall is stuck in the middle inner rail rear locking device, and the middle rail is locked with the inner rail;

[0023] The slide rail changes from the first pulled-out state to the fully closed state of the slide rail: the middle rail and the inner rail are pushed in together until the slide rail is fully closed.

[0024] A further technical solution is that before the slide rail enters the fully open state, it also includes a fully locked state of the slide rail: after the front locking device of the middle inner rail contacts the locking block B and pushes the locking block B away, it is clamped between the locking block A and the locking block B, so that the middle rail is locked with the inner rail;

[0025] When the slide rail is pushed in from the fully open state, it also includes an unlocking process of the middle rail and the inner rail: the push rod pushes the locking block B so that the front locking device of the middle inner rail is disengaged from between the locking block A and the locking block B, so that the middle rail and the inner rail are unlocked.

[0026] The beneficial effects of the embodiments of the present invention are as follows:

[0027] (I) The sequential movable rail assembly of the embodiment of the present invention is provided with a rear locking device for the rail, so that the rail can achieve a stable opening process and a stable closing process through the function of automatic sequential locking. The locking between the middle rail and the inner rail, and the locking between the middle rail and the outer rail, reduce the possibility of the rails detaching from each other during the process of pulling out the rail.

[0028] At the same time, the slide rail rear locking device has a simple structure, is easy to install and disassemble, and fully utilizes the internal space of the slide rail.

[0029] (ii) Furthermore, by providing a front locking device for the inner rail, the slide rail can be pulled out and pushed in stably, and even when the slide rail is fully pulled out, the rails can be locked stably. This further improves the stability of the slide rail, and at the same time ensures that the rails will not be pulled apart even when the slide rail is fully pulled out. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of the slide rail in an embodiment of the present invention.

[0031] Figure 2 It is a schematic structural diagram of a traction block, a locking block and a first resetting spring in an embodiment of the present invention.

[0032] Figure 3 for Figure 1 Enlarged schematic diagram of part A.

[0033] Figure 4 for Figure 1 Schematic diagram of the enlarged portion B.

[0034] Figure 5 Schematic diagram of the fully closed state of the slide rail in an embodiment of the present invention.

[0035] Figure 6 Schematic diagram of the first extended state of the slide rail in an embodiment of the present invention.

[0036] Figure 7 It is an enlarged schematic diagram of the rear locking device of the slide rail in the first extended state of the slide rail in an embodiment of the invention.

[0037] Figure 8It is a large schematic diagram of the rear locking device of the slide rail in the intermediate process of the slide rail changing from the first pulled-out state to the second pulled-out state in an embodiment of the present invention.

[0038] Fig. 9 It is an enlarged schematic diagram of the rear locking device of the slide rail in the second extended state of the slide rail according to the embodiment of the present invention.

[0039] Fig.10 This is a schematic diagram of a state where the slide rail is fully pulled out in an embodiment of the present invention.

[0040] Fig.11 It is an enlarged schematic diagram of the rear locking device of the slide rail in the intermediate process of the slide rail changing from the second pulled-out state to the first pulled-out state in an embodiment of the present invention.

[0041] Fig.12 It is an enlarged schematic diagram of the rear locking device of the slide rail after the slide rail is transferred from the second extended state to the first extended state in the embodiment of the present invention.

[0042] Fig.13 for Figure 2 Schematic diagram of enlarged portion C.

[0043] Fig.14 Schematic diagram of a partial structure of the front locking device of the slide rail in an embodiment of the present invention.

[0044] Fig.15 for Fig.10 Enlarged schematic diagram of part D in the figure.

[0045] In the figure:

[0046] 1. Inner rail; 11. Middle inner rail rear locking device; 111. Third oblique wall; 112. Second notch; 113. Fourth oblique wall; 12. Lock block A; 13. Lock block B; 14. Sliding seat; 15. Push rod; 16. Push block; 17. Compression spring; 18. Second reset spring piece; 2. Middle rail; 21. Traction block; 211. Second straight wall; 212. Guide edge; 22. Locking block; 221. First straight wall; 222. Retaining edge; 23. First reset spring piece; 231. First elastic wall; 232. Second elastic wall; 233. Third elastic wall; 24. First through hole; 25. Second through hole; 26. Middle inner rail front locking device; 3. Outer rail; 31. Middle outer rail rear locking device; 311. First oblique wall; 312. Second oblique wall; 313. First notch; 4. Middle rail retainer; 5. Outer rail retainer. DETAILED DESCRIPTION

[0047] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0048] In order to make the purpose, technical scheme and advantages of the present invention clearer, the device proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0049] Example:

[0050] Figure 1 Schematic diagram of the structure of the slide rail in the embodiment of the present invention. Figure 1 As shown, the slide rail includes an inner rail 1, a middle rail 2 and an outer rail 3. The inner rail 1 is mounted on the middle rail 2 through a middle rail holder 4, and the inner rail 1 can slide relative to the middle rail 2. The middle rail 2 is mounted on the outer rail 3 through an outer rail holder 5. The middle rail 2 can slide relative to the outer rail 3. A slide rail rear locking device is provided on the slide rail.

[0051] The slide rail rear locking device comprises a middle inner rail rear locking device 11, a traction block 21, a locking block 22 and a middle outer rail rear locking device 31. The middle inner rail rear locking device 11 is arranged at the outer rear end of the inner rail 1.

[0052] Figure 2 Schematic diagram of the structure of the traction block, the locking block and the first reset spring in the embodiment of the present invention. Figure 2 As shown, the traction block 21 is rotatably arranged on the inner side of the middle rail 2, and a second straight wall 211 extends from the inner front end of the traction block 21, and a guide edge 212 extends from the outer rear end of the traction block 21. The guide edge 212 passes through the middle rail 2 and is exposed outside the middle rail 2. The locking block 22 is rotatably arranged on the outer side of the middle rail 2, and has a retaining edge 222 at the rear end. When the inner rail 1 slides relative to the middle rail 2 until the inner rail 1 and the middle rail 2 are completely closed, the positions of the middle inner rail rear locking device 11 and the traction block 21 and the locking block 22 correspond. The middle outer rail rear locking device 31 is arranged in the middle of the inner side of the outer rail 3. In this paragraph and other parts of this article, the front end of the slide rail refers to the end of the slide rail close to the direction of slide rail extension, the rear end of the slide rail refers to the end of the slide rail close to the direction of slide rail closing, the middle part of the slide rail refers to the part between the front and rear ends of the slide rail, the inside of the slide rail refers to the side of the outer rail 3 and the middle rail 2 close to the inner rail 1, and the outside of the slide rail refers to the side of the inner rail 1 and the middle rail 2 close to the outer rail 3. Figure 1 As well as in the embodiments shown in other figures, the direction indicated by the arrow X is the front end of the slide rail, that is, the opening direction, the opposite direction indicated by the arrow X is the rear end of the slide rail, that is, the closing direction, the direction indicated by the arrow Y is the inner side of the slide rail, and the opposite direction indicated by the arrow Y is the outer side of the slide rail, the direction indicated by the arrow Z is the upper end of the slide rail, and the opposite direction indicated by the arrow Z is the lower end of the slide rail.

[0053] like Figure 2 As shown, further, a first straight wall 221 extends from the inner front end of the locking block 22, and the first straight wall 221 passes through the middle rail 2 and is exposed on the inner side of the middle rail 2. When the inner rail 1 slides relative to the middle rail 2 until the inner rail 1 and the middle rail 2 are completely closed, during the transition of the slide rail from the second pulled-out state to the first pulled-out state, the middle inner rail rear locking device 11 contacts the first straight wall 221 and pushes the locking block 22 to rotate, so that the retaining edge 222 and the middle outer rail rear locking device 31 are disengaged, and at the same time, the middle inner rail rear locking device 11 contacts the second straight wall 211 and pushes the traction block 21 to rotate, so that the second straight wall 211 is stuck in the middle inner rail rear locking device 11. From the first pulled-out state of the slide rail to the fully closed state of the slide rail, the second straight wall 211 is stuck in the middle inner rail rear locking device 11 so that the inner rail 1 and the middle rail 2 are locked.

[0054] Figure 3 for Figure 1 Further, as Figure 3 As shown, the middle outer rail rear locking device 31 includes a first inclined wall 311 and a second inclined wall 312 extending from the inner surface of the outer rail 3, and a first notch 313 is provided on the front side of the upper end of the second inclined wall 312 for the retaining edge 222 to be inserted into. Figure 4 for Figure 1 The enlarged schematic diagram of part B in FIG. Figure 4 As shown, the middle inner rail rear locking device 11 includes a third slanted wall 111 and a fourth slanted wall 113 extending from the outer side of the inner rail 1 , and a second notch 112 is provided at the front side of the upper end of the third slanted wall 111 for the second straight wall 211 to be inserted into.

[0055] Exemplarily, when looking at the first inclined wall 311 from the inside to the outside, the first inclined wall 311 is in the shape of an inverted right-angled trapezoid, the inclined surface of the inverted right-angled trapezoid is located at the rear end, the inclined surface contacts the guide edge 212 and supports it to slide downward along the inclined surface, pushing the traction block 21 to rotate, so that the second straight wall 211 is separated from the second notch 112, and the straight edge at the lower end of the inverted right-angled trapezoid ensures that the second straight wall 211 is completely separated from the second notch 112 in the direction of movement of the slide rail. When looking at the second inclined wall 312 from the inside to the outside, the second inclined wall 312 is in the shape of a right-angled trapezoid, the inclined surface of the right-angled trapezoid is located at the rear end, the inclined surface contacts the retaining edge 222 and supports it to slide upward along the inclined surface until the retaining edge 222 slides into the first notch 313. When looking at the third inclined wall 111 from the inside to the outside, the third inclined wall 111 is in the shape of a right-angled trapezoid, and the inclined surface of the right-angled trapezoid is located at the rear end, which contacts the second straight wall 211 and supports it to slide upward along the inclined surface until the second straight wall 211 slides into the second notch 112. When looking at the fourth inclined wall 113 from the inside to the outside, the fourth inclined wall 113 is in the shape of an inverted right-angled trapezoid, and the inclined surface of the inverted right-angled trapezoid is located at the rear end, which contacts the first straight wall 221 and supports it to slide downward along the inclined surface, pushing the locking block 22 to rotate, so that the first straight wall 221 is separated from the first notch 313 in the direction perpendicular to the movement of the slide rail, and the straight edge at the lower end of the inverted right-angled trapezoid ensures that the first straight wall 221 is separated from the first notch 313 in the direction of movement of the slide rail.

[0056] like Figure 2 As shown, further, the traction block 21 is located at the front end of the locking block 22, so that the guide edge 212 of the traction block 21 is located at the front end of the retaining edge 222 of the locking block 22. The middle inner rail rear locking device 11 also includes a first reset spring 23. The first reset spring 23 is arranged on the outer side of the middle rail 2, and the front end of the first reset spring 23 has a second elastic wall 232, and the second elastic wall 232 elastically contacts the lower end of the guide edge 212, and always provides an upward support force to the guide edge 212. The rear end of the first reset spring 23 has a first elastic wall 231, and the first elastic wall 231 elastically contacts the upper end of the retaining edge 222, and always provides a downward support force to the retaining edge 222.

[0057] Exemplarily, the inner rail 1 is provided with a first through hole 24 and a second through hole 25, the first straight wall 221 passes through the first through hole 24 and slides in the first through hole 24, and the first through hole 24 limits the rotation range of the locking block 22. The guide edge 212 passes through the second through hole 25 and slides in the second through hole 25, the inner side of the second elastic wall 232 has a third elastic wall 233 extending into the second through hole 25, the third elastic wall 233 is supported at the lower end of the guide edge 212, and the second through hole 25 limits the rotation range of the traction block 21.

[0058] The following Figure 5 to Figure 12 The working method of the sequential movable slide rail assembly in the embodiment of the present invention is shown.

[0059] Figure 5This is a schematic diagram of the fully closed state of the slide rail in the embodiment of the present invention. At this time, the inner rail 1, the middle rail 2 and the outer rail 3 are completely overlapped. At this time, the second straight wall 211 is stuck in the middle inner rail rear locking device 11, and the inner rail 1 and the middle rail 2 are in a locked state. Specifically, combined with Figure 7 The second straight wall 211 is stuck in the second notch 112 , and the second notch 112 prevents the second straight wall 211 from moving toward the rear end, thereby limiting the middle rail 2 from sliding toward the rear end relative to the inner rail 1 .

[0060] Figure 6 This is a schematic diagram of the first pulled-out state of the slide rail according to an embodiment of the present invention. Figure 5 The fully closed state shown Figure 6 During the first pulling-out state, the second straight wall 211 is always stuck in the second notch 112, so that the inner rail 1 drives the middle rail 2 to move together. The middle rail 2 and the inner rail 1 are pulled out simultaneously until the guide edge 212 and the retaining edge 222 contact the middle and outer rail rear locking device 31. Figure 7 1 is an enlarged schematic diagram of the slide rail rear locking device in the first extended state of the slide rail in the embodiment of the invention. In the first extended state, the guide edge 212 and the retaining edge 222 contact the middle outer rail rear locking device 31.

[0061] Figure 8 It is a large schematic diagram of the rear locking device of the slide rail in the intermediate process of the slide rail changing from the first pulled-out state to the second pulled-out state in an embodiment of the present invention. Fig. 9 FIG. 1 is an enlarged schematic diagram of the rear locking device of the slide rail in the second extended state of the slide rail according to an embodiment of the present invention. Figure 8 , Fig. 9 As shown, the second straight wall 211 stuck in the middle inner rail rear locking device 11 is disengaged from the middle inner rail rear locking device 11, the inner rail 1 is unlocked from the middle rail 2, the inner rail 1 continues to move toward the front end, the retaining edge 222 is stuck in the middle outer rail rear locking device 31, and the middle rail 2 is locked with the outer rail 3.

[0062] Specifically, the guide edge 212 contacts the first inclined wall 311 and slides downward along its inclined surface, and the guide edge 212 drives the traction block 21 to rotate so that the second straight wall 211 is separated from the second notch 112, and the inner rail 1 is separated from the middle rail 2. At this time, the third elastic wall 233 of the first reset spring sheet 23 is squeezed, so that the guide edge 212 always slides close to the surface of the first inclined wall 311. After the guide edge 212 is separated from the first inclined wall 311, the third elastic wall 233 pushes the guide edge 212 to reset the traction block 21.

[0063] At the same time, the retaining edge 222 contacts the second inclined wall 312 and slides upward along its inclined surface. At this time, the first elastic wall 231 of the first reset elastic sheet 23 is squeezed, so that the retaining edge 222 always slides close to the surface of the second inclined wall 312 until the retaining edge 222 slides into the first notch 313, and the middle rail 2 and the outer rail 3 are locked.

[0064] Fig.10This is a schematic diagram of the state where the slide rail is fully pulled out in an embodiment of the present invention. Fig.10 As shown, at this time, the middle rail 2 and the outer rail 3 have been locked, the inner rail 1 has been pulled out to the maximum distance, and the slide rail has been completely pulled out.

[0065] During the closing process of the slide rail, the detailed method of changing the state of the slide rail rear locking device includes:

[0066] The slide rail changes from the fully opened state to the second pulled-out state: the inner rail 1 is pushed in until the first straight wall 221 and the second straight wall 211 contact the middle inner rail rear locking device 11 .

[0067] Fig.11 It is an enlarged schematic diagram of the rear locking device of the slide rail in the intermediate process of the slide rail changing from the second pulled-out state to the first pulled-out state in an embodiment of the present invention. Fig.12 This is an enlarged schematic diagram of the rear locking device of the slide rail after the slide rail is changed from the second pulled-out state to the first pulled-out state in the embodiment of the present invention. At this time, the slide rail is changed from the second pulled-out state to the first pulled-out state: the retaining edge 222 stuck in the middle outer rail rear locking device 31 is disengaged from the middle outer rail rear locking device 31, and the outer rail 3 is unlocked from the middle rail 2; the second straight wall 211 is stuck in the middle inner rail rear locking device 11, and the middle rail 2 and the inner rail 1 are locked, and the middle rail 2 and the inner rail 1 continue to move toward the rear end.

[0068] Specifically, Fig.11 and Fig.12 As shown, the first straight wall 221 contacts the fourth inclined wall 113 and slides downward along its inclined surface, and the first straight wall 221 drives the locking block 22 to rotate so that the retaining edge 222 is separated from the first notch 313, and the middle rail 2 and the outer rail 3 are separated. At this time, the first elastic wall 231 of the first reset spring 23 is squeezed, so that the retaining edge 222 always slides close to the surface of the fourth inclined wall 113. After the first straight wall 221 is separated from the fourth inclined wall 113, the first elastic wall 231 pushes the retaining edge 222 to reset the locking block 22.

[0069] At the same time, the second straight wall 211 contacts the third inclined wall 111 and slides upward along its inclined surface. At this time, the third elastic wall 233 of the first reset spring 23 is squeezed, so that the second straight wall 211 always slides close to the surface of the third inclined wall 111 until the second straight wall 211 slides into the second notch 112, and the middle rail 2 and the inner rail 1 are locked.

[0070] The slide rail changes from the first pulled-out state to the fully closed state of the slide rail: the middle rail 2 and the inner rail 1 are pushed in together until the slide rail is fully closed.

[0071] The rear locking device of the slide rail provided by the present invention, when installed on the slide rail, can make the slide rail realize the function of sequential locking during the pulling out process, that is, from the fully closed state to the first pulled out state of the slide rail, the middle rail 2 and the inner rail 1 of the slide rail are in a locked state and pulled out together, and when pulled out to a certain extent, as the slide rail moves, the middle rail 2 and the inner rail 1 can be automatically unlocked, so that the middle rail 2 and the outer rail 3 are locked, so that the inner rail 1 can continue to be pulled out until the slide rail is fully pulled out. Similarly, in the pushing process of the slide rail, the inner rail 1 can be pushed in first until the second pulled out state, and then the outer rail 3 and the middle rail 2 are unlocked, and the inner rail 1 and the middle rail 2 are locked, so that the inner rail 1 and the middle rail 2 can be pushed in together until the slide rail is completely locked. The slide rail can realize a stable pulling out process and a stable closing process through the function of sequential locking, and the locking between the middle rail 2 and the inner rail 1, and the locking between the middle rail 2 and the outer rail 3 reduce the possibility of the rails being separated from each other during the pulling out process of the slide rail.

[0072] At the same time, the slide rail rear locking device has a simple structure, is easy to install and disassemble, and fully utilizes the internal space of the slide rail.

[0073] Furthermore, an embodiment of the present invention also provides a front locking device for the slide rail, which is used to ensure that the slide rail can be in a stable and fully extended state.

[0074] Fig.13 for Figure 2 Schematic diagram of enlarged portion C. Fig.14 FIG. 1 is a partial structural diagram of the front locking device of the slide rail according to an embodiment of the present invention. Fig.13 and Fig.14 The front locking device of the slide rail includes a front locking device 26 for the middle inner rail, a sliding seat 14, a locking block A12, a locking block B13 and a push rod 15. The front locking device 26 for the middle inner rail is specifically a convex block arranged at the front end of the inner side of the middle rail 2. The sliding seat 14 is arranged at the middle part of the inner rail 1, and the position of the sliding seat 14 is closer to the rear end of the slide rail relative to the position of the rear locking device 31 for the middle outer rail. The locking block B13 can slide relative to the inner rail 1 in the sliding seat 14 in a direction perpendicular to the movement of the slide rail.

[0075] Specifically, the sliding seat 14 has a slideway perpendicular to the direction in which the slideway moves. The lock block B13 is fixed to the waist-shaped hole of the slideway perpendicular to the direction in which the slideway moves by rivets. The second reset spring 18 is fixed to the inner rail 1, and the lower end of the second reset spring 18 is in elastic contact with the upper end of the lock block B13. The lower end of the lock block B13 is an inclined surface, and the edge close to the lock block A12 is higher, and the edge away from the lock block A12 is lower.

[0076] Fig.15 for Fig.10 The enlarged schematic diagram of part D in FIG. Fig.14 and Fig.15It is understood that when the slide rail is about to enter the fully pulled-out state, the middle inner rail front locking device 26 contacts the inclined surface of the lock block B13, and as the slide rail moves, the middle inner rail front locking device 26 pushes the lock block B13 toward one end of the second reset spring sheet 18, squeezes the second reset spring sheet 18, and moves along the inclined surface of the lock block B13 and is stuck between the lock block A12 and the lock block B13. At this time, the second reset spring sheet 18 is reset to push the lock block B13 back to its original position along the slide rail. At this time, the slide rail is The rail is in a fully extended state, and the middle rail 2 is locked with the inner rail 1. According to the above, in the fully extended state of the slide rail, the retaining edge 222 is inserted into the middle outer rail rear locking device 31, and the middle rail 2 and the outer rail 3 are also locked. That is to say, before the slide rail enters the fully opened state, it also includes the fully locked state of the slide rail: after the middle inner rail front locking device 26 contacts the locking block B13 and pushes the locking block B13 away, it is inserted between the locking block A12 and the locking block B13, so that the middle rail 2 is locked with the inner rail 1. The slide rail can maintain a stable fully extended state.

[0077] Furthermore, the front locking device of the slide rail also includes a push rod 15, a push block 16 and a compression spring 17. The push block 16 is fixed to the inner rail 1 by rivets in a waist-shaped hole close to the front end and parallel to the direction of movement of the slide rail, and a compression spring 17 is fixed between the push block 16 and the side wall of the inner rail 1, so that the push block 16 can be pressed down in the closing direction of the slide rail, and the compression spring 17 is compressed at the same time. When the compression spring 17 is reset, the push block 16 can be pushed out and reset toward the front end of the slide rail. The front end of the push rod 15 is fixed to the push block 16, and the rear end of the push rod 15 has a push surface. In this embodiment, the push surface of the push rod 15 is approximately parallel to the inclined surface of the lock block B13. Of course, the push surface can also be other suitable shapes. When the push block 16 is pressed, the push rod 15 is pushed, pushing the lock block B13 toward the lower end of the second reset spring 18, and the second reset spring 18 is squeezed. At this time, the inner rail 1 is pushed, so that the middle inner rail front lock device 26 inserted between the lock block A12 and the lock block B13 can be moved out of the position between the lock block A12 and the lock block B13 from the lock block B13, and the middle rail 2 and the inner rail 1 are unlocked. After that, the second reset spring 18 is reset to push the lock block B13 back to its original position, and the slide rail can continue to close. In other words, when the slide rail is pushed in from the fully open state, it also includes the unlocking process of the middle rail 2 and the inner rail 1: the push rod 15 pushes the lock block B13 so that the middle inner rail front lock device 26 is disengaged from between the lock block A12 and the lock block B13, so that the middle rail 2 and the inner rail 1 are unlocked.

[0078] In this embodiment, by providing the middle inner rail front locking device 26, the slide rail can be pulled out and pushed in stably, and further ensure that the rails are stably locked even when the slide rails are fully pulled out. This further improves the stability of the slide rails, and at the same time ensures that the rails will not be pulled apart even when the slide rails are fully pulled out.

[0079] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. Sequential movable slide rail assembly, characterized in that: The invention comprises a slide rail and a slide rail rear locking device; the slide rail comprises an inner rail, a middle rail slidable relative to the inner rail and an outer rail slidable relative to the middle rail; the slide rail rear locking device comprises a middle inner rail rear locking device arranged at the rear end of the outer side of the inner rail, a traction block rotatably arranged on the inner side of the middle rail, a locking block rotatably arranged on the outer side of the middle rail and a middle outer rail rear locking device arranged at the middle part of the inner side of the outer rail, the rear end of the locking block has a retaining edge, the inner front end of the traction block extends a second straight wall, the outer rear end of the traction block extends a guide edge, and the guide edge passes through the middle rail and is exposed outside the middle rail; When the slide rail is in a fully closed state or in a first pulled-out state, the second straight wall is clamped in the middle inner rail rear locking device so that the inner rail is locked with the middle rail; During the transition of the slide rail between the first pulled-out state and the second pulled-out state, the middle outer rail rear locking device contacts the guide edge and pushes the traction block to rotate, so that the second straight wall is disengaged from the middle inner rail rear locking device, and at the same time, the middle outer rail rear locking device contacts the retaining edge and pushes the locking block to rotate, so that the retaining edge is engaged with the middle outer rail rear locking device; In the second pulled-out state to the fully pulled-out state of the slide rail, the retaining edge is clamped in the middle and outer rail rear locking device so that the middle rail is locked with the outer rail.

2. The sequential movable slide rail assembly according to claim 1, characterized in that: A first straight wall extends from the front end of the inner side of the locking block, and the first straight wall passes through the middle rail and is exposed at the inner side of the middle rail; During the transition of the slide rail between the second pulled-out state and the first pulled-out state, the middle inner rail rear locking device contacts the first straight wall and pushes the locking block to rotate, so that the retaining edge is disengaged from the middle outer rail rear locking device, and at the same time, the middle inner rail rear locking device contacts the second straight wall and pushes the pulling block to rotate, so that the second straight wall is engaged with the middle inner rail rear locking device; When the slide rail is in the first pulled-out state to the fully closed state, the second straight wall is clamped in the middle inner rail rear locking device so that the inner rail is locked with the middle rail.

3. The sequential movable slide rail assembly according to claim 2, characterized in that: The middle outer rail rear locking device comprises a first inclined wall and a second inclined wall extending from the inner surface of the outer rail, and a first notch is provided at the front side of the upper end of the second inclined wall for the retaining edge to be inserted into; The middle inner rail rear locking device comprises a third inclined wall and a fourth inclined wall extending from the outer side of the inner rail, and a second notch is provided at the front side of the upper end of the third inclined wall for the second straight wall to be inserted into; The first inclined wall is at a predetermined angle to the moving direction of the slide rail so as to contact the guide edge and push the traction block to rotate, so that the second straight wall is disengaged from the second notch; the second inclined wall is at a predetermined angle to the moving direction of the slide rail so as to contact the retaining edge and push the locking block to rotate, so that the retaining edge is inserted into the first notch; the third inclined wall is at a predetermined angle to the moving direction of the slide rail so as to contact the second straight wall and push the traction block to rotate, so that the second straight wall is inserted into the second notch; the fourth inclined wall is at a predetermined angle to the moving direction of the slide rail so as to contact the first straight wall and push the locking block to rotate, so that the retaining edge is disengaged from the first notch.

4. The sequential movable slide rail assembly according to claim 3 is characterized in that: The traction block is located at the front end of the locking block; the middle inner rail rear locking device also includes a first reset spring piece, which is arranged on the outer side of the middle rail, and the front end of the first reset spring piece has a second elastic wall, and the second elastic wall elastically contacts the lower end of the guide edge; the rear end of the first reset spring piece has a first elastic wall, and the first elastic wall elastically contacts the upper end of the retaining edge.

5. The sequential movable slide rail assembly according to claim 4, characterized in that: The inner rail defines a first through hole and a second through hole, the first straight wall passes through the first through hole and slides in the first through hole, the guide edge passes through the second through hole and slides in the second through hole, the inner side of the second elastic wall has a third elastic wall extending into the second through hole, and the third elastic wall is supported at the lower end of the guide edge.

6. The sequential movable slide rail assembly according to claim 1, characterized in that: The sequential movable slide rail assembly also includes a slide rail front locking device; the slide rail front locking device includes a middle inner rail front locking device arranged at the front end of the inner side of the middle rail, a locking block A arranged at the middle part of the outer side of the inner rail, and a locking block B arranged at the middle part of the outer side of the inner rail and capable of sliding relative to the inner rail in a direction perpendicular to the movement of the slide rail; When the slide rail is fully pulled out, the front locking device of the middle inner rail contacts the locking block B and can be inserted between the locking block A and the locking block B after the locking block B is pushed away, so that the middle rail is locked with the inner rail.

7. The sequential movable slide rail assembly according to claim 6, characterized in that: The front locking device of the slide rail includes a push rod and a push block; the push block is slidably arranged at the front end of the outer side of the inner rail, the front end of the push rod is fixed to the push block, and the rear end of the push rod is provided with a push surface for pushing the lock block B so that the front locking device of the middle inner rail is disengaged from between the lock block A and the lock block B, so that the middle rail is unlocked from the inner rail.

8. The sequential movable slide rail assembly according to claim 6, characterized in that: The front locking device of the slide rail includes a sliding seat; the locking block B can slide in the slideway of the sliding seat; the front locking device of the middle inner rail can contact and push the locking block B from the front end of the slideway; the front locking device of the slide rail also includes a second reset spring sheet, and the lower end of the second reset spring sheet is in elastic contact with the locking block B.

9. A method for operating a sequential movable slide rail assembly implemented by the sequential movable slide rail assembly according to any one of claims 1 to 8, characterized in that: The method comprises an opening step and a closing step of the slide rail; the opening step of the slide rail comprises: When the slide rail is in a fully closed state, the second straight wall is clamped in the middle inner rail rear locking device so that the inner rail is locked with the middle rail; The slide rail changes from the fully closed state to the first pulled-out state: the middle rail and the inner rail are pulled out simultaneously until the guide edge and the retaining edge contact the rear locking device of the middle and outer rails; The slide rail changes from the first pulled-out state to the second pulled-out state: the second straight wall stuck in the middle inner rail rear locking device is disengaged from the middle inner rail rear locking device, the inner rail is unlocked from the middle rail, the retaining edge is stuck in the middle outer rail rear locking device, and the middle rail is locked from the outer rail; The slide rail changes from the second pulled-out state to the slide rail fully opened state: the inner rail continues to be pulled out until the slide rail is fully opened; The closing step of the slide rail comprises: The slide rail is transformed from the fully opened state to the second pulled-out state by pushing the inner rail in until the first straight wall and the second straight wall contact the middle inner rail rear locking device; The slide rail changes from the second pull-out state to the first pull-out state: the retaining edge stuck in the middle outer rail rear locking device is disengaged from the middle outer rail rear locking device, and the outer rail is unlocked from the middle rail; the second straight wall is stuck in the middle inner rail rear locking device, and the middle rail is locked with the inner rail; The slide rail changes from the first pulled-out state to the fully closed state of the slide rail: the middle rail and the inner rail are pushed in together until the slide rail is fully closed.

10. The working method of the sequential movable slide rail assembly according to claim 9, characterized in that: Before the slide rail enters the fully open state, it also includes the fully locked state of the slide rail: after the front locking device of the middle inner rail contacts the locking block B and pushes the locking block B away, it is clamped between the locking block A and the locking block B, so that the middle rail is locked with the inner rail; When the slide rail is pushed in from the fully open state, it also includes an unlocking process of the middle rail and the inner rail: the push rod pushes the locking block B so that the front locking device of the middle inner rail is disengaged from between the locking block A and the locking block B, so that the middle rail and the inner rail are unlocked.

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