Circulating lifting support

Abstract

The utility model relates to a circulating lifting support which comprises a vertical frame part, a containing space is formed among a left side plate, a right side plate and a rear side plate of the vertical frame part, a vertical opening is formed in one side of the vertical frame part, and a ratchet-shaped track is arranged in a first space on the plate face of the rear side plate. The two sides of a sliding plate of a sliding assembly are connected with a first sliding rail and a second sliding rail respectively, the first sliding rail and the second sliding rail are connected with the left side plate and the right side plate respectively, and one end of the sliding assembly penetrates through the vertical opening and protrudes outwards. One end of a control part and one end of a sliding part of a positioning component are respectively pivoted with the sliding plate, a first clamping part at the other end of the control part is mutually abutted or clamped with a second clamping part at one end of the sliding part, and a pushing part at the other end of the sliding part is accommodated in the first space and moves along the ratchet-shaped track so as to position the sliding component.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circulating lifting support, especially to a support which can display the monitor in the stable position after adjusting and lifting, and can quickly descend to prepare for lifting again. BACKGROUND

[0002] The conventional monitor can adjust the angle, and can increase the lifting mechanism to adjust the height to meet the needs of users with different body types. The lifting mechanism mainly pulls the monitor up and down to adjust the height of the monitor, and then fixes the monitor at the predetermined height through the friction between the monitor and the existing lifting support. However, when the monitor has a large weight, the positioning method through the positioning spring or the friction often cannot generate enough pulling force to stably support the monitor.

[0003] Among them, as shown in the utility model patent announcement No. CN221880987U, a display support patent provides a solution, which mainly includes a support main body, a lifting seat, a positioning mechanism and a locking piece. The support main body is provided with a plurality of positioning grooves along the first direction, and each positioning groove has a first opening on one side in the second direction. The lifting seat has a monitor mounting part, and the lifting seat is slidingly installed on the support main body along the first direction. The positioning mechanism has a clamping groove, and the positioning mechanism is movably installed on the lifting seat. The positioning mechanism can extend into or move out of the positioning groove through the first opening. The locking piece is slidingly installed on the lifting seat, and the locking piece can move along the third direction relative to the lifting seat. The locking piece is used to extend into the clamping groove, so that the positioning mechanism is limited in any positioning groove. In this way, the positioning mechanism can be stably supported, and the support stability for supporting the monitor with relatively heavier weight is better.

[0004] The operation mode of the above patent is that the locking member is moved out of the clamping groove, and then the moving member is pushed in the second direction to the direction close to the positioning groove, so that the moving member and the second connecting member move in the second direction to the direction close to the positioning groove, the second section is close to the positioning groove under the pushing of the second connecting member, the elastic reset member is elastically deformed, so that the elastic reset member exerts an elastic force on the second section away from the positioning groove. The rotating part is rotated around the rotating shaft under the driving of the second section, and the first section is also rotated around the rotating shaft, so that the first section moves away from the positioning groove, and the first section moves out of the positioning groove through the first opening. The display mounting part on the lifting seat is adjusted to a suitable position height, and then the moving structure is released, the elastic reset member returns to the state before the elastic deformation, the second section moves away from the positioning groove under the elastic force of the elastic reset member, and the moving member and the second connecting member also move away from the positioning groove, so that the first section, the second section, the moving member and the second connecting member are reset relative to the lifting seat, the first section is inserted into the corresponding positioning groove, and the clamping groove is opposite to the locking member in the first direction. The locking member is inserted into the clamping groove, so that the first section is stably inserted into the positioning groove, and then the display mounting part and the display mounted on the display mounting part are limited at the current position height.

[0005] The display of the above patent needs to move the locking member out of the clamping groove before lifting, and then insert the locking member into the clamping groove after reaching the positioning height, so that the first section can be stably inserted into the positioning groove. In this way, more elements are needed for height positioning, and more processes are needed for operation, which is cumbersome. Practical new type content

[0006] The utility model discloses a circulating lifting support, which can solve the problems of the existing display support, i.e. needing more elements for height positioning and needing more processes for lifting operation. A control member and a sliding block are respectively pivotally connected to a sliding plate, and in the lifting process of the display, the first clamping part of the control member and the second clamping part of the sliding block are in abutment or clamped with each other, so as to simplify the elements, stabilize the positioning of the display after direct height adjustment, and quickly lower the display for next lifting, which is very convenient in use and operation.

[0007] To achieve the above-mentioned utility model purposes, the utility model discloses a circulating lifting support, which comprises a vertical frame, a sliding assembly and a positioning assembly, wherein the vertical frame has a left side plate, a right side plate and a back side plate, and a containing space is formed between the left side plate, the right side plate and the back side plate; the vertical frame is provided with a vertical opening communicating with the containing space on one side; the back side plate is provided with a first space on the plate surface, and the first space is provided with a ratchet track; the sliding assembly is positioned in the containing space; the sliding assembly is provided with a sliding plate, a first sliding rail and a second sliding rail; one side of the sliding plate is connected with the first sliding rail; the first sliding rail is connected with the left side plate in a vertically moving mode; the other side of the sliding plate is connected with the second sliding rail; the second sliding rail is connected with the right side plate in a vertically moving mode; one end of the sliding assembly is protruded outward through the vertical opening of the vertical frame; the positioning assembly is provided with a control element and a sliding element; one end of the control element is pivotally connected with the sliding plate; the other end of the control element is provided with a first clamping part; one end of the sliding element is pivotally connected with the sliding plate; the other end of the sliding element is provided with a second clamping part, which is used for abutting or clamping with the first clamping part; the other end of the sliding element is provided with a pushing part, which is accommodated in the first space and moves along the ratchet track to position the sliding assembly.

[0008] In implementation, the vertical frame comprises an outer frame and an inner frame; the outer frame is provided with a vertical plate part and a cover plate part; the vertical plate part is provided with a plurality of first buckling parts on one side surface; the cover plate part is provided with a plurality of second buckling parts on one side surface, which are used for clamping the plurality of first buckling parts; the inner frame is accommodated and fixed in the positioning space in the outer frame; the inner frame is provided with a left side plate, a right side plate and a back side plate.

[0009] In implementation, the vertical frame further comprises a limiting plate; the upper end of the inner frame is provided with a top plate; the plate surface of the top plate is provided with a fixing part, which is used for connecting the upper end of the limiting plate; the lower end of the inner frame is provided with an adapter seat, which is connected with the lower end of the limiting plate; the upper end of the adapter seat is provided with a plug-in part, which is used for downwardly plugging and fixing the inner frame.

[0010] In implementation, the plate surface of the vertical plate part is provided with a first vertical groove and a second vertical groove which are parallel to each other; the sliding assembly further comprises a connecting element; one end of the connecting element is combined with the sliding plate; the other end of the connecting element is provided with a first cantilever and a second cantilever which are parallel to each other; the first cantilever passes through the vertical opening and then the first vertical groove; the second cantilever passes through the vertical opening and then the second vertical groove.

[0011] In implementation, one side of the left side plate is further provided with a left bent plate, which is parallel to the back side plate; one side of the sliding plate is provided with at least one first clamping groove; the first sliding rail comprises at least one first sliding block; one side of any first sliding block is provided with a first positioning groove; the first positioning groove is provided with at least one first clamping block; the at least one first clamping block clamps any first clamping groove.

[0012] In implementation, any of the at least one first slider is a cuboid, one side of the first slider has a first positioning slot, and the other three sides of the first slider respectively have at least one first long protruding rib for respectively abutting against the left bending plate, the left side plate and the rear side plate.

[0013] In implementation, one side of the right side plate further has a right bending plate parallel to the rear side plate, and the other side of the sliding plate has at least one second clamping slot, the second sliding rail includes at least one second slider, one side of any of the second sliders has a second positioning slot, and the second positioning slot has at least one second clamping block for clamping any of the second clamping slots.

[0014] In implementation, any of the at least one second slider is a cuboid, one side of the second slider has a second positioning slot, and the other three sides of the second slider respectively have at least one second long protruding rib for respectively abutting against the right bending plate, the right side plate and the rear side plate.

[0015] In implementation, the positioning assembly further includes a resilient member, one end of the resilient member is positioned on the sliding plate, and the other end of the resilient member is connected with the control member for pulling the control member to make the second clamping part and the first clamping part abut against or clamp each other.

[0016] In implementation, the first space includes a ratchet space and a second space, the ratchet space has a ratchet-shaped track, the ratchet-shaped track includes a plurality of ratchets, the plurality of ratchets are arranged in a vertical direction, and the plurality of ratchets respectively extend upward in an inclined direction towards the second space.

[0017] In implementation, the top of the second space of the rear side plate has a straight track for guiding the abutting part of the sliding member to make the second clamping part and the first clamping part clamp each other, and the bottom of the second space of the rear side plate has an inclined track for guiding the abutting part of the sliding member to make the second clamping part and the first clamping part disengage from each other and be converted into an abutting state.

[0018] For the purpose of facilitating a more in-depth understanding of the present application, the following detailed description is provided. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in conjunction with the drawings and specific embodiments.

[0020] Figure 1 The present application is a preferred embodiment of the present application and a three-dimensional appearance schematic view of the combination of the quick-release plate and the base.

[0021] Figure 2 The present application is a preferred embodiment of the present application and a three-dimensional appearance schematic view of the combination of the quick-release plate and the base.

[0022] Figure 3 The present application is a preferred embodiment of the present application and a three-dimensional appearance schematic view of the combination of the quick-release plate and the base.

[0023] Figure 4 The use state schematic view of the pushing part of the preferable embodiment of the utility model reaching the highest point of the straight track.

[0024] Figure 5 The use state schematic view of the pushing part of the preferable embodiment of the utility model pressing the inclined track.

[0025] Figure 6 The use state schematic view of the preferable embodiment of the utility model when the sliding piece rotates to release the clamping state of the first clamping part and the second clamping part.

[0026] Figure 7 The use state schematic view of the preferable embodiment of the utility model when the pushing part passes the peak part of the ratchet.

[0027] Figure 8 The use state schematic view of the preferable embodiment of the utility model when the pushing part is positioned in the valley part between two ratchets.

[0028] Figure 9 The three-dimensional appearance schematic view of the preferable embodiment of the utility model when the pushing part is positioned in the valley part between two ratchets.

[0029] Explanation of reference signs

[0030] 1: circulating lifting support

[0031] 2: vertical frame

[0032] 21: top plate

[0033] 211: fixed part

[0034] 22: adapter seat

[0035] 221: plug-in part

[0036] 23: limiting plate

[0037] 231: buckle

[0038] 3: sliding assembly

[0039] 31: connecting piece

[0040] 311: first cantilever

[0041] 312: connecting plate

[0042] 313: second cantilever

[0043] 32: sliding plate

[0044] 321: first clamping groove

[0045] 322: second clamping groove

[0046] 33: First slide rail

[0047] 331: First slider

[0048] 332: First positioning slot

[0049] 333: First block

[0050] 334: First long rib

[0051] 34: Second slide rail

[0052] 341: Second slider

[0053] 342: Second positioning slot

[0054] 343: Second Card Block

[0055] 344: Second Long Rib

[0056] 4: Positioning Components

[0057] 41: Control components

[0058] 411: Positioning Block

[0059] 412: First Card Section

[0060] 42: Slider

[0061] 421: Second Card Section

[0062] 422: Pushing Department

[0063] 43: Elastic element

[0064] 5: Outer frame

[0065] 51: Vertical board part

[0066] 511: First vertical trench

[0067] 512: Second vertical trench

[0068] 513: First buckle part

[0069] 52: Cover plate section

[0070] 521: Opening

[0071] 522: Second buckle part

[0072] 53: Positioning Space

[0073] 6: Inner frame components

[0074] 61: Left Bend Plate

[0075] 62: Left side panel

[0076] 63: rear side plate

[0077] 64: right side plate

[0078] 65: right curved plate

[0079] 66: accommodating space

[0080] 67: upright opening

[0081] 68: first space

[0082] 681: ratchet space

[0083] 682: second space

[0084] 683: ratchet-shaped track

[0085] 684: ratchet

[0086] 685: peak

[0087] 686: valley

[0088] 687: straight track

[0089] 688: inclined track

[0090] 9: quick release plate

[0091] 91: base DETAILED DESCRIPTION

[0092] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other manners different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0093] Please refer to Figures 1-3As shown, the utility model circulation lifting support 1 mainly includes a vertical frame 2, a sliding assembly 3 and a positioning assembly 4, wherein the vertical frame 2 includes an outer frame 5 and an inner frame 6, the sliding assembly 3 and the positioning assembly 4 are arranged in the containing space 66 of the inner frame 6, and an inner component is formed by modularization, so that the whole inner component is conveniently assembled in the outer frame 5, and in implementation, the outer frame 5 mainly includes a vertical plate part 51 and a cover plate part 52. The sliding assembly 3 mainly includes a sliding plate 32, a first sliding rail 33 and a second sliding rail 34, so that the sliding assembly 3 moves up and down in the containing space 221; one end of the sliding assembly 3 passes through a vertical opening 67 of the vertical frame 2, and then protrudes outward after passing through the first vertical groove 511 and the second vertical groove 512, so as to connect a quick release plate 9 of a display; in addition, the bottom end of the vertical frame 2 is downwardly locked to a base 91, so that the vertical frame 2 stands on the base 91 to form a standing posture. The positioning assembly 4 mainly includes a control piece 41 and a sliding piece 42, one end of the control piece 41 and one end of the sliding piece 42 are respectively pivotally connected to the sliding plate 32, the first clamping part 412 at the other end of the control piece 41 and the second clamping part 421 at one end of the sliding piece 42 abut or clamp each other, and a pushing part 422 at the other end of the sliding piece 42 moves along a ratchet-shaped track 683, so as to position the sliding assembly 3, and then the display can be stably positioned at a height.

[0094] Please refer to Figures 2-4 As shown, it is a preferred embodiment of the utility model circulation lifting support 1, which includes a vertical frame 2, a sliding assembly 3 and a positioning assembly 4, wherein the vertical frame 2 mainly includes an outer frame 5 and an inner frame 6, the outer frame 5 has a vertical plate part 51 and a cover plate part 52, the vertical plate part 51 is a rectangular plate, the vertical plate part 51 has a first vertical groove 511 and a second vertical groove 512 parallel to each other on the plate surface, and the two edges on one side surface of the vertical plate part 51 are respectively provided with a plurality of protrusions arranged at intervals, each protrusion is respectively provided with a clamping groove, and in implementation, the protrusion with the clamping groove serves as a first clamping part 513; the cover plate part 52 is formed by stamping and bending a thin plate, one side surface of the cover plate part 52 is provided with an opening 521, and the two side edges of the opening 521 are respectively provided with a plurality of clamping blocks arranged at intervals, and the clamping blocks serve as second clamping parts 522. A plurality of first clamping parts 513 correspondingly clamp a plurality of second clamping parts 522, so as to combine the vertical plate part 51 and the cover plate part 52, and form a positioning space 53 in the inner part of the outer frame 5 to position the inner frame 6.

[0095] The inner frame 6 is a thin plate punched and bent. In practice, the inner frame 6 can also be an aluminum extrusion. After being formed, the inner frame 6 includes a left bent plate 61, a left side plate 62, a back side plate 63, a right side plate 64, and a right bent plate 65, which are continuously bent and frame a containing space 66. The left bent plate 61 and the right bent plate 65 are parallel to the back side plate 63. Between the left bent plate 61 and the right bent plate 65 on one side of the inner frame 6, a vertical opening 67 is formed, which is communicated with the containing space 66. A first space 68 is punched and formed on the surface of the back side plate 63. The first space 68 includes a ratchet space 681 and a second space 682. The ratchet space 681 has a ratchet track 683. The ratchet track 683 includes a plurality of ratchets 684 arranged in a vertical direction. The free ends of the ratchets 684 are respectively directed towards the second space 682 and respectively extend upwards in an inclined direction, so as to form a plurality of peak portions 685 and a plurality of valley portions 686. The second space 682 is a vertical long groove. The top end of the long groove is communicated with a straight track 687 upwards. The bottom end of the long groove is communicated with an inclined track 688 downwards.

[0096] The upper end of the inner frame 6 has a top plate 21. The surface of the top plate 21 has a slot, which is a fixing portion 211. The lower end of the inner frame 6 has an adapter 22. The upper end of the adapter 22 has a plug-in portion 221, which is used for downward plug-in fixing of the inner frame 6. The lower end of the adapter 22 is locked to the base 91, so that the vertical frame 2 is erected on the base 91. The vertical opening 67 of the inner frame 6 has a limiting plate 23. The limiting plate 23 is an elongated plate. The upper end of the limiting plate 23 has a buckle 231, which is buckled and connected to the fixing portion 211 of the top plate 21. The lower end of the limiting plate 23 is locked and connected to a side surface of the adapter 22, so as to position the sliding assembly 3 in the containing space 66.

[0097] The sliding assembly 3 includes a connecting piece 31, a sliding plate 32, a first sliding rail 33, and a second sliding rail 34. The connecting piece 31 includes a first cantilever 311, a connecting plate 312, and a second cantilever 313, which are continuously bent. The first cantilever 311 and the second cantilever 313 are parallel to each other. After passing through the vertical opening 67 on one side of the inner frame 6, the first cantilever 311 and the second cantilever 313 respectively pass through the first vertical groove 511 and the second vertical groove 512 and respectively protrude outward to be connected to the quick release plate 9 of the display. The sliding plate 32 is an elongated vertical plate. The sliding plate 32 is combined with the connecting plate 312. One side of the sliding plate 32 has two spaced slots, either of which is a first clamping groove 321. The other side of the sliding plate 32 has two spaced slots, either of which is a second clamping groove 322.

[0098] The first slide rail 33 includes two first sliders 331 with the same shape, each of which is a cuboid. One side of each first slider 331 has a first positioning slot 332 with two first clamping blocks 333 arranged at intervals. The two first clamping blocks 333 are inserted into any first clamping slot 321 on one side of the sliding plate 32. The other three sides of each first slider 331 have two first long protruding ribs 334 arranged in parallel. The two first long protruding ribs 334 on each side press against the left bending plate 61, the left side plate 62, and the rear side plate 63, respectively, so that the first slide rail 33 can slide up and down. The second slide rail 34 includes two second sliders 341 with the same shape, each of which is a cuboid. One side of each second slider 341 has a second positioning slot 342 with two second clamping blocks 343 arranged at intervals. The two second clamping blocks 343 are inserted into any second clamping slot 322 on the other side of the sliding plate 32. The other three sides of each second slider 341 have two second long protruding ribs 344 arranged in parallel. The two second long protruding ribs 344 on each side press against the right bending plate 65, the right side plate 64, and the rear side plate 63, respectively. In this way, the first slide rail 33 and the second slide rail 34 can be positioned vertically in the accommodating space 66 of the inner frame 6, so that the sliding plate 32 is clamped and combined between the first slide rail 33 and the second slide rail 34, and the connecting piece 31 and the sliding plate 32 can move up and down simultaneously.

[0099] The positioning assembly 4 includes a control piece 41, a sliding piece 42, and a resilient piece 43. One end of the control piece 41 and one end of the sliding piece 42 are pivotally connected to the plate surface of the sliding plate 32. The control piece 41 has a positioning block 411 at the middle and lower segment position. The other end of the control piece 41 has a triangular-shaped barb, which serves as a first clamping part 412. The end of the sliding piece 42 has a hook part, which serves as a second clamping part 421. The other end of the sliding piece 42 has a short cylinder, which is accommodated in the first space 68 and serves as a pushing part 422. The resilient piece 43 is a compression spring. One end of the resilient piece 43 is positioned on the plate surface of the sliding plate 32, and the other end of the resilient piece 43 is connected to the positioning block 411 of the control piece 41, so as to pull the control piece 41 and make the first clamping part 412 and the second clamping part 421 abut or clamp each other.

[0100] In this way, as Figures 4-9As shown, when the display is adjusted in height upward from the lowest point, the display and the sliding assembly 3 are pushed upward, so that the pushing part 422 of the sliding part 42 moves upward along a toothed track 683, and when the pushing part 422 passes the peak 685 of the toothed track 683, the first clamping part 412 and the second clamping part 421 still maintain the abutting state, and then the pushing part 422 enters the valley 686 between the two upper teeth 684 and is positioned in the valley 686, so that the display can be freely stopped at a fixed height. When the display is continuously pushed upward, the pushing part 422 moves upward along the toothed track 683 to the highest point of the straight track 687, the sliding part 42 is rotated through the guide of the straight track 687, so that the second clamping part 421 and the first clamping part 412 of the control part 41 form the mutually clamped state, the pushing part 422 can move downward along the second space 682, and then the display directly drops to the lowest point. Then, the pushing part 422 is guided through the inclined track 688, so that the sliding part 42 is rotated again, the first clamping part 412 and the second clamping part 421 are in the mutually clamped state, and are converted into the mutually abutting state, so as to adjust the positioning height of the display upward again.

[0101] In summary, the sliding assembly and the positioning assembly of the utility model are arranged in an inner frame to form a module, and the entire inner frame is arranged in an outer frame, so that the assembly is quite simple, and the assembly time is effectively shortened. In addition, the control part and the sliding block are respectively pivoted on the sliding plate, the first clamping part and the second clamping part are in the mutually abutting state, and the pushing part moves along the toothed track, so that the height of the display can be effectively adjusted to adapt to different sizes of displays, the display is stably positioned, and the effect of simplifying components is achieved. Furthermore, after the display is directly adjusted, the display is stably positioned, when the pushing part moves upward to the highest point of the straight track, the second clamping part and the first clamping part are in the mutually clamped state, so that the display can be quickly lowered for lifting again, which is quite convenient and efficient in use and operation.

[0102] The utility model discloses the preferable specific embodiment for realizing the above-mentioned purpose, but it is not used to limit the structural features of the utility model, any person skilled in the art, under the technical spirit of the utility model, any easy thought change or modification is possible, and all are covered in the protection scope of the utility model.

Claims

1. A circulating lifting support, characterized in that, include: An upright frame has a left side plate, a right side plate and a rear side plate, with an accommodating space between the left side plate, the right side plate and the rear side plate, and an upright opening on one side of the upright frame communicating with the accommodating space. The surface of the rear side plate has a first space, and a ratchet track is provided in the first space. A sliding assembly, positioned within the receiving space, includes a sliding plate, a first slide rail, and a second slide rail. One side of the sliding plate is connected to the first slide rail, which is connected to the left side plate via vertical movement. The other side of the sliding plate is connected to the second slide rail, which is connected to the right side plate via vertical movement. One end of the sliding assembly protrudes outward through the vertical opening of the upright frame. A positioning assembly has a control member and a slider. One end of the control member is pivotally connected to the sliding plate, and the other end of the control member has a first engaging portion. One end of the slider is pivotally connected to the sliding plate, and the slider has a second engaging portion for abutting or engaging with the first engaging portion. The other end of the slider has a pushing portion, which is accommodated in the first space and moves along the ratchet track to position the sliding assembly.

2. The circulating lifting support as described in claim 1, characterized in that, The upright frame includes an outer frame and an inner frame. The outer frame has a vertical plate and a cover plate. The vertical plate has a plurality of first snap-fit ​​parts on one side and the cover plate has a plurality of second snap-fit ​​parts on one side for correspondingly snapping the plurality of first snap-fit ​​parts. The outer frame has a positioning space inside for accommodating and fixing the inner frame. The inner frame has a left side plate, a right side plate and a rear side plate.

3. The circulating lifting support as described in claim 2, characterized in that, The upright frame also includes a limiting plate. The upper end of the inner frame has a top plate, and the surface of the top plate has a fixing part for connecting the upper end of the limiting plate. The lower end of the inner frame has an adapter seat, which is connected to the lower end of the limiting plate, and the upper end of the adapter seat has a plug-in part for the inner frame to be inserted downward and fixed.

4. The circulating lifting support as described in claim 2, characterized in that, The plate surface of the upright plate has a first vertical groove and a second vertical groove that are parallel to each other. The sliding assembly also includes a connector. One end of the connector is connected to the sliding plate, and the other end of the connector has a first cantilever and a second cantilever that are parallel to each other. The first cantilever passes through the upright opening and then through the first vertical groove; the second cantilever passes through the upright opening and then through the second vertical groove.

5. The circulating lifting support as described in claim 1, characterized in that, The left side plate also has a left curved plate on one side, which is parallel to the rear side plate; the sliding plate has at least one first slot on one side, the first slide rail includes at least one first slider, each of the first sliders has a first positioning groove on one side, the first positioning groove has at least one first locking block, and the at least one first locking block engages with any of the first slots.

6. The circulating lifting support as described in claim 5, characterized in that, The first slider is a cuboid, and one side of the first slider has the first positioning groove. The other three sides of the first slider each have at least one first long protruding rib for pressing against the left curved plate, the left side plate and the rear side plate respectively.

7. The circulating lifting support as described in claim 1, 5, or 6, characterized in that, The right side plate also has a right curved plate on one side, which is parallel to the rear side plate; the other side of the sliding plate has at least one second slot, the second slide rail includes at least one second slider, one side of any of the second sliders has a second positioning groove, and the second positioning groove has at least one second locking block for engaging any of the second slots.

8. The circulating lifting support as described in claim 7, characterized in that, At least one of the second sliders is a cuboid, and one side of the second slider has the second positioning groove. The other three sides of the second slider each have at least one second long protruding rib for pressing against the right curved plate, the right side plate and the rear side plate respectively.

9. The circulating lifting support as described in claim 1, characterized in that, The positioning component also includes an elastic element, one end of which positions the sliding plate, and the other end of which is connected to the control element for pulling the control element so that the first engaging part and the second engaging part abut against or engage with each other.

10. The circulating lifting support as described in claim 1 or 9, characterized in that, The first space includes a ratchet space and a second space. The ratchet space has a ratchet-shaped track. The ratchet-shaped track includes multiple ratches, which are arranged at intervals in an upright direction and face the second space respectively, and extend upward in an oblique direction respectively.

11. The circulating lifting support as described in claim 10, characterized in that, The top of the second space of the rear side panel has a straight track for guiding the pushing part of the slider, so that the second engaging part and the first engaging part engage with each other; the bottom of the second space of the rear side panel has an oblique track for guiding the pushing part of the slider, so that the second engaging part and the first engaging part disengage from each other and change to a mutually abutting state.

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