A segmented linkage lifting mechanism and a desk with the same

Abstract

This invention discloses a segmented linkage lifting mechanism and its corresponding lifting table. The segmented linkage lifting mechanism includes: a first lifting column, a gear assembly, an X-shaped lifting fork, and a first rack and a second rack. The edge of the first gear has partial teeth. When the first lifting column moves up and down in a controlled manner for a first stroke, the partial teeth mesh with the first teeth, driving the second gear to rotate. The second gear drives the first rack and the second rack to move towards or away from each other, thereby driving the X-shaped lifting fork to move up and down. When the first lifting column moves up and down in a controlled manner for a second stroke, the partial teeth disengage from the first teeth, allowing the first lifting column to move up and down independently. This achieves segmented linkage lifting of the screen, with the lifting power derived from the tabletop lifting, eliminating the need for a separate power mechanism, simplifying the structure, and reducing costs. Furthermore, the interlocking mechanism enables the independent lifting of the corresponding lifting table without interference.

Description

Technical Field

[0001] This invention relates to the field of height-adjustable desks, and more particularly to a segmented linkage lifting mechanism and its corresponding height-adjustable desk. Background Technology

[0002] Currently, electric height-adjustable desks and dual-person height-adjustable desks are widely used in office settings. The desktop can be freely adjusted to suit sitting or standing postures. However, the screens that come with existing height-adjustable desks are usually of fixed height and cannot automatically adjust with changes in desktop height. When the desktop is raised, the screen is relatively too low, reducing its blocking effect and compromising user privacy; when the desktop is lowered, the screen is relatively too high, obstructing the user's view and causing visual discomfort. Therefore, existing solutions struggle to simultaneously meet the needs of privacy and visual openness in office settings.

[0003] For two-person, face-to-face height-adjustable desks (i.e., workstations with two people facing each other), the desktop height adjustment for the two users is often inconsistent. Ordinary fixed screens cannot be adjusted independently for each side, resulting in excessive obstruction on one side and insufficient protection on the other, severely impacting the working experience for both parties. To address this issue, the market currently offers two main solutions: Solution 1: Installing independent screens on both sides of the work surface, allowing the screens to rise and fall with their respective work surfaces. While this meets basic needs, it is costly, and the two screens are prone to misalignment during use, resulting in extremely low market satisfaction. Solution 2: Using external independent lifting mechanisms to adjust the screens. However, this solution is cumbersome to operate, has poor structural stability, or can only achieve overall screen height adjustment, failing to meet the independent height adjustment needs of two people working in a face-to-face position.

[0004] For example, Chinese patent (publication number CN220109342U) discloses a height-adjustable desk with a screen that rises and falls synchronously with the desktop. However, this height-adjustable desk rises and falls synchronously with the desktop and the screen, which cannot achieve independent control by two people in the same position, and it does not have segmented linkage logic, resulting in a mediocre user experience. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a segmented linkage lifting mechanism and its corresponding lifting table to solve the technical problem that existing lifting tables cannot achieve segmented lifting.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, embodiments of the present invention provide a segmented linkage lifting mechanism, comprising: A first lifting column, wherein the first lifting column has a cavity, and the cavity wall has a first tooth extending in a vertical direction; A gear assembly, the gear assembly including a first gear and a second gear arranged coaxially, the first gear being located in the cavity and meshing with the first tooth portion; An X-shaped lifting fork, the X-shaped lifting fork comprising a first rotating arm and a second rotating arm hinged to the middle portion of the first rotating arm; and A first rack and a second rack, wherein one end of the first rack is hinged to the lower end of the first rotating arm and the other end is engaged with the second gear; one end of the second rack is hinged to the lower end of the second rotating arm and the other end is engaged with the second gear. The first gear has a partial toothed edge. When the first lifting column moves up and down in a controlled manner for the first stroke, the partial toothed edge meshes with the first tooth, driving the second gear to rotate. The second gear drives the first rack and the second rack to move towards or away from each other, thereby driving the X-shaped lifting fork to move up and down. When the first lifting column moves up and down in a controlled manner for the second stroke, the partial toothed edge separates from the first tooth, so that the first lifting column can move up and down independently.

[0007] The X-shaped lifting fork further includes a bottom guide member, which has a first sliding cavity extending laterally, and the first rack and the second rack are both disposed in the first sliding cavity.

[0008] The first rack has a first roller at its outer end, the second rack has a second roller at its outer end, and the bottom guide has a second sliding cavity extending laterally. The second sliding cavity is arranged parallel to the first sliding cavity, and both the first roller and the second roller are rolled within the second sliding cavity.

[0009] The X-shaped lifting fork further includes a top guide member, which has a third sliding cavity extending laterally. The top end of the first rotating arm is provided with a third roller, and the top end of the second rotating arm is provided with a fourth roller. Both the third roller and the fourth roller are rotatably disposed within the third sliding cavity.

[0010] The first gear and the second gear are coaxially connected by a connecting shaft, and the outer wall of the connecting shaft is provided with a limiting protrusion; the bottom guide is also provided with a first interlocking member, the first interlocking member is provided with a first locking port, and the connecting shaft passes through the first locking port.

[0011] The second gear is coaxially provided with a third gear on its outer side. The segmented linkage lifting mechanism also includes a second lifting column arranged parallel to the first lifting column. The second lifting column has a cavity, and the cavity has a second tooth that meshes with the third gear.

[0012] Secondly, embodiments of the present invention also provide a positioning and lifting table, the positioning and lifting table including the segmented linkage lifting mechanism as described above, and a screen controlled by the X-shaped lifting fork.

[0013] The X-shaped lifting fork is also equipped with a front screen guide post and a rear screen guide post. The front edge of the screen is slidably inserted into the front screen guide post, and the rear edge of the screen is slidably inserted into the rear screen guide post.

[0014] The alignment lifting table includes a first lifting platform, a second lifting platform, and a bracket supported at the bottom of the first lifting platform and the second lifting platform. The first lifting platform is also connected to the first lifting column, and the second lifting platform is also connected to the second lifting column.

[0015] The first lifting column is provided with a first strip hole extending vertically, the second lifting column is provided with a second strip hole extending vertically, the first lifting platform is provided with a first pin inserted into the first strip hole, and the second lifting platform is provided with a second pin inserted into the second strip hole.

[0016] The first lifting column is also provided with a second interlocking component, which is used to control the first lifting platform to lock with the first pin when no external force is applied; the second lifting column is provided with a third interlocking component, which is used to control the second lifting platform to lock with the second pin when no external force is applied.

[0017] The segmented linkage lifting mechanism and its corresponding lifting table of the present invention utilize a combination structure of a specially structured gear assembly and an X-shaped lifting fork. The segmented lifting movement of the first or second lifting column drives the X-shaped lifting fork to move, thereby achieving segmented linkage lifting of the screen. This ensures that when the user lowers the tabletop, the screen does not follow, and once the tabletop has risen to a set height, it no longer drives the screen to rise. The lifting power of this corresponding lifting table comes from the tabletop's lifting mechanism, eliminating the need for a separate power mechanism, simplifying the structure and reducing costs. Furthermore, interlocking components enable independent lifting of the corresponding tables without interference.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0019] Figure 1 and Figure 2 This is a schematic diagram of the overall structure of the alignment and lifting table according to an embodiment of the present invention from different perspectives.

[0020] Figure 3 This is an exploded view of the alignment and lifting table according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the support structure of the alignment and lifting table according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the assembly state of the segmented linkage lifting mechanism and the screen part in an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the first lifting column portion of the segmented linkage lifting mechanism according to an embodiment of the present invention.

[0024] Figure 7 for Figure 3 The diagram shows a magnified view of part A.

[0025] Figure 8 for Figure 6 The diagram shows a magnified view of part B.

[0026] Figure 9 and Figure 10 These are schematic diagrams of the segmented linkage lifting mechanism from different perspectives according to an embodiment of the present invention.

[0027] Figure 11 This is an exploded view of the segmented linkage lifting mechanism according to an embodiment of the present invention.

[0028] Figure 12 This is an enlarged structural diagram of a partial component of the segmented linkage lifting mechanism according to an embodiment of the present invention.

[0029] Figure 13 for Figure 11 The diagram shows a magnified view of a portion of the C structure.

[0030] Figure 14 for Figure 11 The diagram shows a magnified view of a portion of the D-structure.

[0031] Figure 15 for Figure 12 The diagram shows a magnified view of the local structure of E.

[0032] Figure 16 This is a schematic diagram of the assembly state of the gear assembly and the first interlocking component of the segmented linkage lifting mechanism according to an embodiment of the present invention.

[0033] Figure 17 for Figure 16 The diagram shows a magnified view of a portion of F.

[0034] Figures 18 to 21 This is a schematic diagram of four height states of the screen of the alignment and lifting table according to an embodiment of the invention.

[0035] Explanation of reference numerals in the attached figures: The components include: a height-adjustable table 100, a segmented linkage lifting mechanism 200, a first lifting platform 1, a second lifting platform 2, a screen assembly 3, a screen 31, a front screen guide column 32, a rear screen guide column 33, a lifting screen assembly 4, a lifting linkage assembly 41, a first lifting column 42, a second lifting column 43, a bracket 5, a first lifting sleeve rod 52, a second lifting sleeve rod 53, a third lifting sleeve rod 51, a desktop 11, a support component 12, a lifting rod 121, a first pin 112, a notch 111, a first rotating arm 4131, a second rotating arm 4132, a first rack 415, a second rack 416, a first roller 4151, a second roller 4161, a third roller 4133, a fourth roller 4134, and a bottom. Guide component 411, first sliding cavity 4113, second sliding cavity 4111, guide hole 4112, top guide component 412, third sliding cavity 4121, connecting groove 4122, gear assembly 414, first gear 4141, second gear 4144, third gear 4142, connecting shaft 4143, limiting protrusion 41431, partial toothed opening 41411, toothed opening structure 41421, first interlocking component 417, first locking opening 4171, front elastic locking protrusion 4173, rear elastic locking protrusion 4172, strip tooth 4151, strip tooth structure 4161, first strip hole 421, second interlocking component 422, strip groove 4223, first elastic buckle 4221, second elastic buckle 422. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In this invention, terms such as "installed," "connected," "joined," and "fixed" should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Currently, electric height-adjustable desks and dual-person height-adjustable desks are widely used in office settings. The desktop can be freely adjusted to suit sitting or standing postures. However, the screens that come with existing height-adjustable desks are usually of fixed height and cannot automatically adjust with changes in desktop height. When the desktop is raised, the screen is relatively too low, reducing its blocking effect and compromising user privacy; when the desktop is lowered, the screen is relatively too high, obstructing the user's view and causing visual discomfort. Therefore, existing solutions struggle to simultaneously meet the needs of privacy and visual openness in office settings.

[0042] For two-person, face-to-face height-adjustable desks (i.e., workstations with two people facing each other), the desktop height adjustment for the two users is often inconsistent. Ordinary fixed screens cannot be adjusted independently for each side, resulting in excessive obstruction on one side and insufficient protection on the other, severely impacting the working experience for both parties. To address this issue, the market currently offers two main solutions: Solution 1: Installing independent screens on both sides of the work surface, allowing the screens to rise and fall with their respective work surfaces. While this meets basic needs, it is costly, and the two screens are prone to misalignment during use, resulting in extremely low market satisfaction. Solution 2: Using external independent lifting mechanisms to adjust the screens. However, this solution is cumbersome to operate, has poor structural stability, or can only achieve overall screen height adjustment, failing to meet the independent height adjustment needs of two people working in a face-to-face position.

[0043] For example, Chinese patent (publication number CN220109342U) discloses a height-adjustable desk with a screen, in which the screen rises and falls synchronously with the desktop. However, this height-adjustable desk only allows for simultaneous rise and fall of the desktop and screen, making it impossible for two people to control it independently and lacking segmented linkage logic, resulting in a mediocre user experience. Based on the above needs, there is an urgent need to propose a segmented linkage lifting mechanism 200 and its corresponding height-adjustable desk 100.

[0044] Please see Figures 6 to 17 In this embodiment, the segmented linkage lifting mechanism 200 includes: The first lifting column 42 has a cavity inside, and the cavity wall has a first tooth extending in the vertical direction. Gear assembly 414, the gear assembly 414 includes a first gear 4141 and a second gear 4144 coaxially arranged, the first gear 4141 being located in the cavity and meshing with the first tooth portion. X-shaped lifting fork 413, the X-shaped lifting fork 413 including a first rotating arm 4131 and a second rotating arm 4132 hinged to the middle of the first rotating arm 4131; and A first rack 415 and a second rack 416, wherein one end of the first rack 415 is hinged to the lower end of the first rotating arm 4131 and the other end is engaged with the second gear 4144; one end of the second rack 416 is hinged to the lower end of the second rotating arm 4132 and the other end is engaged with the second gear 4144.

[0045] The first gear 4141 has a partial toothed edge 41411 on its edge. When the first lifting column 42 is moved up and down in a controlled manner for the first stroke, the partial toothed edge 41411 meshes with the first tooth, driving the second gear 4144 to rotate. The second gear 4144 drives the first rack 415 and the second rack 416 to move towards or away from each other, thereby driving the X-shaped lifting fork 413 to rise and fall. When the first lifting column 42 is moved up and down in a controlled manner for the second stroke, the partial toothed edge 41411 separates from the first tooth, so that the first lifting column 42 can rise and fall independently.

[0046] In this embodiment, the second gear 4144 meshes with both the first rack 415 and the second rack 416. Therefore, when the second gear 4144 rotates, it can synchronously drive the first rack 415 and the second rack 416 to move towards or away from each other. When they move towards each other, the lateral width of the first rack 415 and the second rack 416 decreases, driving the first rotating arm 4131 and the second rotating arm 4132, which are hinged in the middle, to rotate. This causes the top heights of the first rotating arm 4131 and the second rotating arm 4132 to rise, thus driving the components connected to the tops of the first rotating arm 4131 and the second rotating arm 4132 to rise.

[0047] The edge of the first gear 4141 has only a portion with partial teeth 41411, while other parts do not have teeth. Therefore, during the lifting process, the first tooth inside the first lifting column 42 will only drive the first gear 4141 to rotate when it meshes with the partial teeth 41411. When the first tooth is disengaged from the partial teeth 41411, the lifting action of the first lifting column 42 is independent, and the first gear 4141 will not rotate with the lifting action of the first lifting column 42. Therefore, the engagement or disengagement of the partial teeth 41411 with the first tooth of the first gear 4141 realizes the graded linkage lifting function of the X-shaped lifting fork 413.

[0048] For further details, please refer to the following: Figure 6 and Figure 9 The X-shaped lifting fork 413 further includes a bottom guide 411, which has a laterally extending first sliding cavity 4113. The first rack 415 and the second rack 416 are both disposed within the first sliding cavity 4113. The first rack 415 and the second rack 416 are inserted into the first sliding cavity 4113 from both ends of the cavity. The adjacent ends of the first rack 415 and the second rack 416 mesh with the top and bottom of the second gear 4144, respectively. The first sliding cavity 4113 serves both to mount the first rack 415 and the second rack 416 and to guide their sliding direction. The first rack 415 and the second rack 416 can only move horizontally towards or away from each other along the first sliding cavity 4113.

[0049] Please combine again Figure 7 The first rack 415 has a first roller 4151 at its outer end, and the second rack 416 has a second roller 4161 at its outer end. The outer end refers to the end opposite to the adjacent end of each rack. The bottom guide 411 has a laterally extending second sliding cavity 4111, which is parallel to the first sliding cavity 4113. Both the first roller 4151 and the second roller 4161 are rolled within the second sliding cavity 4111. This rolling assembly of the first roller 4151, the second roller 4161, and the second sliding cavity 4111 reduces the resistance during movement of the first rack 415 and the second rack 416, making their movement smoother. The bottom guide member 411 has a guide hole 4112 extending along its length at its top. The connecting ears on the first rack 415 and the second rack 416 extend out of the guide hole 4112 and are hinged to the first rotating arm 4131 and the second rotating arm 4132 respectively. The first roller 4151 and the second roller 4161 are respectively connected to the connecting ears at the corresponding positions.

[0050] In this embodiment, the bottom guide 411 can be made of a relatively mature aluminum profile, and its interior can be machined according to the above structural description to form the corresponding first sliding cavity 4113, second sliding cavity 4111, and guide hole 4112.

[0051] Please refer to it again. Figures 6 to 8 The X-shaped lifting fork 413 further includes a top guide member 412, which has a laterally extending third sliding cavity 4121. The top end of the first rotating arm 4131 is provided with a third roller 4133, and the top end of the second rotating arm 4132 is provided with a fourth roller 4134. Both the third roller 4133 and the fourth roller 4134 are rotatably disposed within the third sliding cavity 4121. The third roller 4133 is movably connected to the top end of the first rotating arm 4131, and the fourth roller 4144 is also movably connected to the top end of the second rotating arm 4132. The third sliding cavity 4121 provides directional guidance for the movement of the third roller 4133 and the second roller 4134, and also improves the lifting stability of the first rotating arm 4131 and the second rotating arm 4132.

[0052] In this embodiment, the top guide 412 is further provided with a connecting groove 4122. The connecting groove 4122 extends in the same direction as the length of the top guide 412 and is arranged parallel to the third sliding cavity 4121. The connecting groove 4122 is used to connect the screen 31. In this embodiment, the top guide 412 can be made of aluminum profile using mature technology, and the third sliding cavity 4121 and the connecting groove 4122 can be machined inside according to the above description.

[0053] Please refer to it again. Figures 10 to 12 The first gear 4141 and the second gear 4144 are coaxially connected by a connecting shaft 4143. The outer wall of the connecting shaft 4143 is provided with a limiting protrusion 41431. The bottom guide member 411 is also provided with a first interlocking member 417, which is provided with a first locking port 4171. The connecting shaft 4143 passes through the first locking port 4171. When the connecting shaft 4143 rotates a certain angle with the first gear 4141, its limiting protrusion 41431 abuts against the first locking port 4171 and locks, preventing the first gear 4141 from being subjected to a reverse force that would cause the connecting shaft 4143 to rotate synchronously in the opposite direction, thus locking the connecting shaft 4143 in its current state. Specifically, the front and rear sidewalls of the first locking port 4171 are respectively provided with a front elastic locking protrusion 4173 and a rear elastic locking protrusion 4172. When the limiting protrusion 41431 abuts against the front elastic locking protrusion 4173 and the rear elastic locking protrusion 4172, the connecting shaft 4143 is locked to prevent it from rotating in the opposite direction.

[0054] Furthermore, a third gear 4142 is coaxially provided on the outer side of the second gear 4144. The segmented linkage lifting mechanism 200 also includes a second lifting column 43 arranged parallel to the first lifting column 42. The second lifting column 43 has a cavity, and a second tooth is provided in the cavity. The second tooth meshes with the third gear 4142.

[0055] The first lifting column 42 is used to drive the first gear 4141, and the second lifting column 43 is used to drive the third gear 4142. This enables the first lifting column 42 or the second lifting column 43 to independently drive the gear assembly 414. When the first lifting column 42 abuts and meshes with the first gear 4141, or the second lifting column 43 abuts and meshes with the third gear 4142, it can synchronously drive the corresponding first lifting column 42 or second lifting column 43 to rise and fall synchronously.

[0056] The structure of the third gear 4142 is the same as that of the first gear 4141. Its edge portion is provided with a toothed structure 41421, and the toothed structure 41421 and the local toothed structure 41411 of the first gear 4141 are in the same axial distribution position.

[0057] When the first lifting column 42 or the second lifting column 43 rises to a first height, the first tooth inside the first lifting column 42 is separated from the first gear 4141. Similarly, during this process, the second tooth inside the second lifting column 43 is also separated from the tooth structure 41421 of the third gear 4142. Therefore, during this process, the gear assembly 414 will not rotate with the first lifting column 42 or the second lifting column 43, but will remain stationary. Correspondingly, the X-shaped lifting fork 413 will not rise synchronously during this process.

[0058] As the first lifting column 42 or the second lifting column 43 continues to rise to the second height, the first tooth abuts and meshes with the partial tooth 41411 of the first gear 4141, and the second tooth of the second lifting column 43 abuts and meshes with the tooth structure 41211. At this time, the first gear 4141 and the third gear 4142 are coaxially connected, so they always rotate synchronously, correspondingly realizing the synchronous upward movement of the first lifting column 42 and the second lifting column 43. Correspondingly, the top of the X-shaped lifting fork 413 will rise synchronously during this process.

[0059] As the first lifting column 42 or the second lifting column 43 continues to rise to the third height, the first tooth inside the first lifting column 42 separates from the partial tooth 41411 of the first gear 4141. Similarly, the second tooth inside the second lifting column 43 also separates from the tooth structure 41421 on the third gear 4142. During this process, neither the first lifting column 42 nor the second lifting column 43 drives the gear assembly 414 to rotate, and both can continue to rise independently to a certain height. Correspondingly, the top of the X-shaped lifting fork 413 will not continue to rise synchronously during this process.

[0060] Please refer to it again. Figure 15 In this embodiment, the first rack 415 is provided with strip teeth 4151 only in some positions, and the corresponding second rack 416 is also provided with strip tooth structure 4161 in some positions.

[0061] In this embodiment, the first gear 4141 and the third gear 4142 have the same diameter and the same structure. The diameter of the first gear 4141 is much larger than that of the second gear 4144. The second gear 4144 is installed in the first sliding cavity 4111 of the bottom guide member 411.

[0062] The bottom guide 411, top guide 412, X-shaped lifting fork 413, gear assembly 414, first rack 415, second rack 416, and first interlocking member 417 together form a lifting linkage assembly 41. This lifting linkage assembly 41 is controlled by the first lifting column 42 or the second lifting column 43 to achieve lifting action. The aforementioned lifting linkage assembly 41, the first lifting column 42, and the second lifting column 43 together form a lifting screen assembly 4, which can be combined with different lifting tables.

[0063] Please refer to it again. Figures 1 to 5 The present invention also provides a positioning lifting table 100, which includes the segmented linkage lifting mechanism 200 as described above, and a screen 31 controlled by the X-shaped lifting fork 413.

[0064] Specifically, the X-shaped lifting fork 413 is also equipped with a front screen guide post 32 and a rear screen guide post 33. The front edge of the screen 31 is slidably inserted into the front screen guide post 32, and the rear edge of the screen 31 is slidably inserted into the rear screen guide post 33. The front screen guide post 32 and the rear screen guide post 33 can be fixedly connected to the bottom guide member 411 or fixedly connected to the bracket 5. They are used to guide the screen 31 to move vertically and improve the stability of the screen 31's vertical movement. The screen 31, the front screen guide post 32, and the rear screen guide post 33 together form the screen assembly 3.

[0065] like Figure 1 or Figure 3The alignment and height-adjustable table 100 includes a first height-adjustable platform 1, a second height-adjustable platform 2, and a bracket 5 supporting the bottom of the first height-adjustable platform 1 and the second height-adjustable platform 2. The screen assembly 3 is disposed between the first height-adjustable platform 1 and the second height-adjustable platform 2. The first height-adjustable platform 1 is also connected to the first height-adjustable column 42, and the second height-adjustable platform 2 is also connected to the second height-adjustable column 43. That is, in this embodiment, the lifting power of the first height-adjustable column 42 comes from the first height-adjustable platform 1, and the lifting power of the second height-adjustable column 43 comes from the second height-adjustable platform 2. Compared with the prior art, which sets an independent power unit to drive the screen 31 to lift, the lifting power of the screen 31 in this embodiment comes from the lifting power of the first height-adjustable platform 1 or the second height-adjustable platform 2, without the need for an additional drive unit, making its structure simpler and its cost lower.

[0066] like Figure 4 As shown, the bracket 5 is provided with a first lifting sleeve 52 that cooperates with the first lifting column 42, and a second lifting sleeve 53 that corresponds to the second lifting column 43. At the same time, the bracket 5 is also provided with several third lifting sleeves 51 for cooperating with the first lifting platform 1 and the second lifting platform 2 for lifting.

[0067] The first lifting platform 1 and the second lifting platform 2 have the same structure and are symmetrically arranged with the screen assembly 3. Taking the first lifting platform 1 as an example, the first lifting platform 1 includes: a desktop 11 and a support member 12 supported on the bottom of the desktop 11. The support member 12 includes at least one lifting rod 121 that is plugged into and fitted with the third lifting sleeve rod 51. The lifting rod 121 is driven to lift and lower by a power module such as an electric cylinder or a pneumatic cylinder to adjust the height of the desktop 11.

[0068] Please refer to it again. Figures 6 to 8 The first lifting column 42 and the second lifting column 43 have the same structure. Taking the first lifting column 42 as an example, the first lifting column 42 is also provided with a first strip hole 421 extending vertically, and the second lifting column 43 is provided with a second strip hole extending vertically. The first lifting platform 1 is provided with a first pin 112 inserted into the first strip hole 421, and correspondingly, the second lifting platform 2 is provided with a second pin inserted into the second strip hole. The outer edge of the tabletop 11 is provided with a notch 111, and the front and rear sidewalls of the notch 111 are respectively provided with the first pin 112. The first lifting column 42 is vertically inserted through the notch 111, and the first pin is respectively inserted into the first strip hole 421. When the desktop 11 is lowered to its lowest position, the first pin 112 is not in contact with the first strip hole 421. If the desktop 11 is raised until the first pin 112 is hooked on the top of the first strip hole 421, the first lifting column 42 will start to rise along with the first lifting platform 1, and synchronously drive the screen 31 to rise as well.

[0069] To ensure that the first lifting platform 1 and the second lifting platform 2 do not interfere with each other during descent and do not follow synchronously, the first lifting column 42 is also provided with a second interlocking member 422. The second interlocking member 422 is used to control the first lifting platform 1 to lock with the first pin 112 when no external force is applied. Similarly, the second lifting column 43 is provided with a third interlocking member, which is used to control the second lifting platform 2 to lock with the second pin when no external force is applied.

[0070] like Figure 8 As shown, the second interlocking member 422 has a vertically oriented strip groove 4223. The bottom of the strip groove 4223 is open and corresponds to the position of the first strip hole 421. The second interlocking member 422 is located at the top of the first lifting column 42. The vertically opposite sidewalls of the strip groove 4223 are respectively provided with a first elastic buckle 4221 and a second elastic buckle 4222. When the first pin 112 moves from bottom to top, it can be engaged in the strip groove 4223 by the elastic deformation of the first elastic buckle 4221 and the second elastic buckle 4222 under the action of external force. If no external force pushes the first pin 112 down, the first pin 112 will always be engaged in the strip groove 4223. Therefore, the first lifting column 42 and the first pin 112 are relatively stationary, and the corresponding first lifting platform 1 will also be locked at the current height.

[0071] Since the first lifting column 42 and the second lifting column 43 have the same structure, when the first lifting platform 1 descends to the preset height, the first pin 112 and the strip groove 4223 on the second interlocking member 422 enter the separated state from the locked state. If there is no downward external force, the corresponding second lifting platform 2 will be locked by the second pin on the corresponding third interlocking member, thus realizing the independent descent control of the first lifting platform 1, the second lifting platform 2 and the screen 31, and the two do not affect each other.

[0072] Please refer to it again. Figures 18 to 21 When the first lifting platform 1 begins to rise from its lowest position (720mm), the segmented linkage lifting mechanism 200 operates in three stages: The first stage (the table rises less than 100mm): the pin of the first lifting table 1 rises with the table, causing the first lifting column 42 to move relative to each other within the range of the elongated hole. At this time, the first gear 4141 has not yet rotated to the toothed structure part and has no contact with the rack of the first lifting column 42. The screen 31 remains in the original position and does not rise or fall. This stage is the range for the user to adjust their sitting posture. The screen does not need to move with the user.

[0073] The second stage (the platform rises between 100mm and 200mm): The pins of the first lifting platform 1 drive the first lifting column 42 to rise continuously. Driven by the first lifting column 42, the first gear 4141 rotates approximately 120 degrees, and a portion of its teeth begins to mesh with the rack of the first lifting column 42. As the platform continues to rise to 200mm, the first gear 4141 rotates another approximately 120 degrees, driving the second gear 4144 and the X-shaped lifting fork 413 to move, driving the screen 31 to rise 300mm to its highest position (1570mm). When the platform reaches 200mm, the first gear 4141 rotates to its toothless portion, disengaging from the rack of the first lifting column 42. The gear assembly 414 and the spring-loaded latch of the first interlocking member 417 lock together, preventing the gear assembly 414 from reversing, thereby locking the screen 31 in its highest position and preventing it from falling on its own.

[0074] The third stage (the table rises by more than 200mm to 300mm): the first gear 4141 has entered the toothless section and is completely disengaged from the first lifting column 42. The screen 31 remains at its highest position and does not continue to rise, ensuring the stability of the screen and avoiding excessive obstruction of the overall view of the office.

[0075] Compared with the prior art, the segmented linkage lifting mechanism and its alignment lifting table of the present invention have the following advantages: In this embodiment, the screen lifting mechanism is mechanically linked with the existing lifting mechanism of the lifting table frame. The driving force required for screen lifting comes directly from the lifting action of the tabletop. There is no need to set up an independent motor or external lifting component for the screen, which fundamentally simplifies the overall structure, significantly reduces the number of parts and raw material costs, and reduces the risk of structural instability introduced by external lifting components.

[0076] This embodiment uses a spring-loaded structure of PA plastic interlocking parts in conjunction with the pins on the opposing double-sided lifting tabletops to achieve independent interlocking control of the opposing tabletops for two people: the lifting of either side of the tabletop can drive the lifting column of the screen with rack and pinion. The pin on the higher side of the tabletop automatically engages with the spring-loaded interlocking parts and gains control, while the pin on the lower side of the tabletop automatically disengages. This avoids conflicts between the lifting operations of the two sides of the tabletops and the control of the screen, ensuring the stability and reliability of the screen when the opposing two people use it independently.

[0077] This embodiment employs a segmented gear with teeth on only one-third of its circumference. Through the alternating arrangement of toothed and toothless sections, combined with the locking function of the interlocking spring-loaded latch, a three-stage lifting control logic for the screen is achieved. When the desktop rises less than 100mm, the screen remains stationary (fine-tuning range); when raised from 100mm to 200mm, the screen rises 300mm to its highest position and locks; when raised more than 200mm, the screen remains at its highest position and does not rise further. This design, while ensuring the structural stability of the screen, effectively avoids the problems of insufficient screen coverage or excessively high screens that obstruct the view, precisely balancing the needs of privacy protection and visual transparency in office settings.

[0078] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A segmented linkage lifting mechanism, characterized in that, include: A first lifting column, wherein the first lifting column has a cavity, and the cavity wall has a first tooth extending in a vertical direction; A gear assembly, the gear assembly including a first gear and a second gear arranged coaxially, the first gear being located in the cavity and meshing with the first tooth portion; The X-shaped lifting fork includes a first rotating arm and a second rotating arm hinged to the middle of the first rotating arm. as well as A first rack and a second rack, wherein one end of the first rack is hinged to the lower end of the first rotating arm and the other end is engaged with the second gear; one end of the second rack is hinged to the lower end of the second rotating arm and the other end is engaged with the second gear. The first gear has a partial toothed edge. When the first lifting column moves up and down in a controlled manner for the first stroke, the partial toothed edge meshes with the first tooth, driving the second gear to rotate. The second gear drives the first rack and the second rack to move towards or away from each other, thereby driving the X-shaped lifting fork to move up and down. When the first lifting column moves up and down in a controlled manner for the second stroke, the partial toothed edge separates from the first tooth, so that the first lifting column can move up and down independently.

2. The segmented linkage lifting mechanism according to claim 1, characterized in that, The X-shaped lifting fork also includes a bottom guide member, which has a first sliding cavity extending laterally, and the first rack and the second rack are both disposed in the first sliding cavity.

3. The segmented linkage lifting mechanism according to claim 2, characterized in that, The outer end of the first rack is provided with a first roller, the outer end of the second rack is provided with a second roller, and the bottom guide is provided with a second sliding cavity extending laterally. The second sliding cavity is arranged parallel to the first sliding cavity, and both the first roller and the second roller are rolled within the second sliding cavity.

4. The segmented linkage lifting mechanism according to claim 1, characterized in that, The X-shaped lifting fork also includes a top guide member, which has a third sliding cavity extending laterally. The top end of the first rotating arm is provided with a third roller, and the top end of the second rotating arm is provided with a fourth roller. Both the third roller and the fourth roller are rotatably disposed within the third sliding cavity.

5. The segmented linkage lifting mechanism according to claim 2, characterized in that, The first gear and the second gear are coaxially connected by a connecting shaft, and the outer wall of the connecting shaft is provided with a limiting protrusion; the bottom guide is also provided with a first interlocking member, the first interlocking member is provided with a first locking port, and the connecting shaft passes through the first locking port.

6. The segmented linkage lifting mechanism according to any one of claims 1 to 5, characterized in that, A third gear is coaxially provided on the outer side of the second gear. The segmented linkage lifting mechanism also includes a second lifting column arranged parallel to the first lifting column. The second lifting column has a cavity, and a second tooth is provided in the cavity. The second tooth meshes with the third gear.

7. A height-adjustable desk, characterized in that, The alignment lifting table includes the segmented linkage lifting mechanism as described in claim 6, and a screen controlled by the X-shaped lifting fork.

8. The alignment and lifting table according to claim 7, characterized in that, The X-shaped lifting fork is also provided with a front screen guide post and a rear screen guide post. The front edge of the screen is slidably inserted into the front screen guide post, and the rear edge of the screen is slidably inserted into the rear screen guide post.

9. The alignment and lifting table according to claim 8, characterized in that, The alignment lifting table includes a first lifting platform, a second lifting platform, and a bracket supported at the bottom of the first lifting platform and the second lifting platform. The first lifting platform is also connected to the first lifting column, and the second lifting platform is also connected to the second lifting column.

10. The alignment and lifting table according to claim 9, characterized in that, The first lifting column is provided with a first strip hole extending in the vertical direction, the second lifting column is provided with a second strip hole extending in the vertical direction, the first lifting platform is provided with a first pin inserted into the first strip hole, and the second lifting platform is provided with a second pin inserted into the second strip hole.

11. The alignment and lifting table according to claim 10, characterized in that, The first lifting column is also provided with a second interlocking component, which is used to control the first lifting platform to lock with the first pin when no external force is applied; the second lifting column is provided with a third interlocking component, which is used to control the second lifting platform to lock with the second pin when no external force is applied.

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