Monitor Lift Stand

Abstract

This utility model provides a monitor lifting bracket, which includes: a fixing mechanism, including a fixed base and a rack; and a movable mechanism, including a movable base, a gear, a rotating shaft, and a linkage block. The rotating shaft is rotatably engaged with the movable base and has friction between them to support the monitor. The linkage block is circumferentially fixedly disposed on the rotating shaft. The gear is rotatably engaged with the rotating shaft and meshes with the rack. The gear has locking teeth, and the linkage block has locking blocks and levers adjacent to each other circumferentially. When the gear rises along the rack, the locking teeth can push the levers to rotate away from the locking blocks, so that the levers leave the movement path of the locking teeth, and the gear and the rotating shaft rotate relative to each other. When the gear descends along the rack, the locking teeth can push the levers to rotate closer to the locking blocks, so that the locking teeth, levers, and locking blocks abut in sequence, and the gear and the rotating shaft rotate synchronously. Since a constant force spring is not required, the space occupied is reduced, the volume is reduced, and the cost is relatively lower.

Description

Technical Field

[0001] This utility model relates to the field of monitor bracket technology, and in particular to a monitor lifting bracket. Background Technology

[0002] Monitors are common devices used to display electronic information. Users usually mount them on monitor stands to adjust the height of the monitor for a better viewing experience.

[0003] In existing technology, monitor height adjustment stands incorporate a constant force spring. This constant force spring provides a constant elastic force to overcome the monitor's weight, allowing users to adjust the monitor's height with less force. However, the presence of the constant force spring increases the cost of the monitor height adjustment stand, and its installation occupies a significant amount of space, resulting in an excessively large monitor height adjustment stand. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a monitor lift bracket that can reduce cost and size.

[0005] This utility model provides a monitor lifting bracket, which includes: a fixing mechanism including a fixed base and a rack disposed on the fixed base; and a movable mechanism including a movable base, a gear, a rotating shaft, and a linkage block. The rotating shaft is rotatably engaged with the movable base and has friction between them capable of supporting the monitor. The linkage block is circumferentially fixedly disposed on the rotating shaft. The gear is rotatably engaged with the rotating shaft and meshes with the rack. The gear has locking teeth. The linkage block has relatively fixed locking blocks and relatively rotatable lever blocks. The locking blocks and lever blocks are adjacent in the circumferential direction. When the gear rises along the rack, the locking teeth can push the lever blocks to rotate away from the locking blocks, so that the lever blocks leave the movement path of the locking teeth, and the gear and the rotating shaft rotate relative to each other. When the gear descends along the rack, the locking teeth can push the lever blocks to rotate closer to the locking blocks, so that the locking teeth, the lever blocks, and the locking blocks abut in sequence, and the gear and the rotating shaft rotate synchronously.

[0006] The monitor lifting bracket provided by this embodiment of the utility model has at least the following beneficial effects: By setting a gear on the movable seat and a rack on the fixed seat, the gear and rack mesh, allowing the movable seat to rise and fall relative to the fixed seat. Simultaneously, a rotating shaft and a linkage block are provided. The rotating shaft rotatably engages with the movable seat, creating friction that supports the display. The linkage block is circumferentially fixed on the rotating shaft, and a locking tooth is set on the gear. A relatively fixed locking block and a relatively rotatable shifting block are set on the linkage block, adjacent to each other circumferentially. When the gear rises along the rack, the locking tooth pushes the shifting block to rotate away from the locking block, causing the shifting block to leave the movement path of the locking tooth. The wheel can rotate freely relative to the pivot. During the upward movement, there is no need to overcome the friction between the pivot and the movable seat. Users can thus adjust the height of the monitor with a small amount of force. When the gear descends along the rack, the locking teeth can push the lever to rotate towards the side closer to the locking block. This causes the locking teeth, lever, and locking block to abut against each other in sequence. The gear and pivot rotate synchronously. During the descent, the friction between the pivot and the movable seat can support the monitor. Users only need to provide external force to overcome this friction to lower the height of the monitor. Since there is no need to set a constant force spring, the space occupied is reduced, the volume is reduced, and the cost is relatively lower.

[0007] In one embodiment of this implementation, the gear has a rotating hole, the linkage block is rotatably engaged with the rotating hole, the locking tooth is formed on the inner wall of the rotating hole, one end face of the linkage block is provided with the locking block and the shifting block and abuts against the locking tooth, and the other end face of the linkage block abuts against the movable seat.

[0008] In one embodiment of this implementation, the movable mechanism includes a mating block, which is circumferentially fixedly sleeved on the rotating shaft and rotatably engaged with the rotating hole. One end face of the mating block abuts against the retaining tooth, and the other end face of the mating block abuts against the movable seat.

[0009] In one embodiment of this implementation, the movable seat is provided with a first friction plate that abuts against the mating block; and / or, the movable seat is provided with a second friction plate that abuts against the linkage block.

[0010] In one embodiment of this implementation, the movable mechanism includes a rotating rod, one end of which is connected to the mating block and the other end of which is connected to the linkage block, and the toggle block is rotatably sleeved on the rotating rod.

[0011] In one embodiment of this implementation, both the mating block and the linkage block are provided with mounting slots, and the two ends of the rotating rod are respectively installed in the corresponding mounting slots.

[0012] In one embodiment of this implementation, the rotating shaft includes a shaft body and an adjusting member. One end of the shaft body abuts against the outer side of the movable seat, and the other end passes through the movable seat and the linkage block, and cooperates with the adjusting member. The adjusting member is used to adjust the pressure between the shaft body and the movable seat.

[0013] In one embodiment of this implementation, the movable mechanism includes a first friction block, and a boss is formed at one end of the shaft away from the adjusting member. The first friction block is sleeved on the shaft and located between the boss and the movable seat.

[0014] In one embodiment of this implementation, the movable seat is provided with a third friction plate that abuts against the first friction block.

[0015] In one embodiment of this implementation, the movable mechanism includes a second friction block, which is sleeved on the shaft and located between the adjusting member and the movable seat.

[0016] In one embodiment of this implementation, the movable seat is provided with a fourth friction plate that abuts against the second friction block.

[0017] In one embodiment of this implementation, the locking tooth includes a clearance surface and an abutment surface. The clearance surface is used to abut against the lever when the gear rises along the rack, and the clearance surface is perpendicular to the radial direction. The abutment surface is used to abut against the lever when the gear descends along the rack, and the abutment surface is parallel to the radial direction.

[0018] In one embodiment of this implementation, there are multiple teeth, pry blocks, and locking blocks, and they are arranged in a one-to-one correspondence.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of a monitor lifting bracket according to one embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the movable mechanism in the monitor lifting bracket; Figure 3 yes Figure 1 A schematic diagram of the fixing mechanism in the monitor lifting bracket in its disassembled state; Figure 4 yes Figure 2A schematic diagram of the disassembled structure of the active mechanism (hidden active seat); Figure 5 yes Figure 1 A cross-sectional structural diagram of the gears and racks and other related components in the monitor lifting bracket; Figure 6 yes Figure 4 A structural schematic diagram of the active mechanism in cross-section; Figure 7 yes Figure 2 A structural diagram of the rotating shaft, movable seat, and other related components in the moving mechanism in an exploded state; Figure 8 yes Figure 2 A structural schematic diagram of the rotating shaft, movable seat, and other related components in the moving mechanism from another perspective in an exploded state.

[0021] Figure label: Monitor height adjustment bracket 100; Fixing mechanism 10; fixing seat 11; rack 12; Movable mechanism 20; Movable seat 21; First friction plate 211; Second friction plate 212; Third friction plate 213; Fourth friction plate 214; Gear 22; Clamping tooth 221; Avoidance surface 2211; Abutment surface 2212; Rotating hole 2201; Rotating shaft 23; Shaft body 231; Boss 2311; Adjusting component 232; Linkage block 24; Clamping block 241; Pulley block 242; Mounting groove 2401; Mating block 25; Rotating rod 26; First friction block 27; Second friction block 28; Washer 29; Mounting base 31; slider 32. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer 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.

[0027] Please see Figures 1 to 5 , Figure 1 This is a schematic diagram of the structure of the monitor lifting bracket 100 according to one embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the movable mechanism 20 in the monitor lifting bracket 100; Figure 3 yes Figure 1 A schematic diagram of the fixing mechanism 10 in the monitor lifting bracket 100 in an exploded state; Figure 4 yes Figure 2 A schematic diagram of the disassembled structure of the active mechanism 20 (hidden active seat 21); Figure 5 yes Figure 1This is a cross-sectional structural diagram of the gear 22 and rack 12, as well as other associated components, in a monitor lifting bracket 100. This utility model provides a monitor lifting bracket 100, which includes a fixing mechanism 10 and a movable mechanism 20. The fixing mechanism 10 includes a fixing seat 11 and a rack 12 disposed on the fixing seat 11. The movable mechanism 20 includes a movable seat 21, a gear 22, a rotating shaft 23, and a linkage block 24. The rotating shaft 23 is rotatably engaged with the movable seat 21 and has frictional force between them capable of supporting the monitor. The linkage block 24 is circumferentially fixedly disposed on the rotating shaft 23. The gear 22 is rotatably engaged with the rotating shaft 23 and meshes with the rack 12. The gear 22 has locking teeth 221. The linkage block 24 has a relatively fixed locking block 241 and a relatively rotatable lever block 242, which are adjacent to each other circumferentially.

[0028] When gear 22 rises along rack 12, locking tooth 221 can push lever 242 to rotate away from locking block 241, so that lever 242 leaves the movement path of locking tooth 221, and gear 22 and rotating shaft 23 rotate relative to each other; when gear 22 falls along rack 12, locking tooth 221 can push lever 242 to rotate closer to locking block 241, so that locking tooth 221, lever 242 and locking block 241 abut in sequence, and gear 22 and rotating shaft 23 rotate synchronously.

[0029] Specifically, the movable base 21 is equipped with a mounting base 31 for mounting the display, allowing the fixed base 11 to move the display up and down. The movable base 21 has a slider 32, and the fixed base 11 has a sliding groove (not shown). The slider 32 slides into the sliding groove to guide the movable base 21 and the fixed base 11, allowing the movable base 21 to slide vertically relative to the fixed base 11. The rack 12 extends parallel to the vertical direction.

[0030] Specifically, frictional force capable of overcoming the gravity of the display can be provided for the rotating shaft 23 by means of a friction ring, friction plate, damper, or other structure between the rotating shaft 23 and the movable seat 21. In this embodiment, the movable seat 21 has two shaft holes. The rotating shaft 23 passes through one of the shaft holes from one side, passes through the gear 22 and the linkage block 24, and exits from the other shaft hole.

[0031] Understandably, please refer to the following for details. Figure 5 , Figure 5 The structure shown is in a state of no external interference. The locking teeth 221, the lever 242 and the locking block 241 abut against each other in a clockwise direction. The friction between the rotating shaft 23 and the movable seat 21 overcomes the gravity of the display, so that the gear 22 and the rack 12 are relatively stationary and the display stays at the current height.

[0032] When gear 22 rises along rack 12 (adjusting the monitor height), gear 22 rotates counterclockwise. During the first rotation of gear 22, locking tooth 221 can pass over locking block 241 and push lever 242 to rotate counterclockwise as well, causing lever 242 to leave the path of locking tooth 221. During the nth rotation of gear 22 (n > 1), locking tooth 221 will not interfere with lever 242 and locking block 241. Therefore, during this process, gear 22 can rotate relative to shaft 23, and the user does not need to overcome the friction between shaft 23 and movable seat 21. When the monitor height is adjusted to the correct position, under the influence of the monitor's gravity, gear 22 will descend a certain height along rack 12 and rotate clockwise by a certain angle, causing locking tooth 221, lever 242, and locking block 241 to re-engage in the clockwise direction, relying on the friction between shaft 23 and movable seat 21 to overcome the monitor's gravity.

[0033] When gear 22 descends along rack 12 (lowering the monitor), gear 22 rotates clockwise. Since the locking teeth 221, the lever 242 and the locking block 241 abut against each other in the clockwise direction, gear 22 needs to drive the rotating shaft 23 to rotate relative to the movable seat 21. Therefore, the user needs to apply an external force greater than the friction between the rotating shaft 23 and the movable seat 21 to lower the monitor height.

[0034] By setting a gear 22 on the movable seat 21 and a rack 12 on the fixed seat 11, the gear 22 meshes with the rack 12, allowing the movable seat 21 to rise and fall relative to the fixed seat 11. Simultaneously, a rotating shaft 23 and a linkage block 24 are provided. The rotating shaft 23 rotatably engages with the movable seat 21 and provides friction to support the display. The linkage block 24 is circumferentially fixed on the rotating shaft 23, and a locking tooth 221 is provided on the gear 22. A relatively fixed locking block 241 and a relatively rotatable lever block 242 are provided on the linkage block 24. The locking block 241 and lever block 242 are adjacent circumferentially. When the gear 22 rises along the rack 12, the locking tooth 221 pushes the lever block 242 to rotate away from the locking block 241, thus causing the lever block 242 to rotate. After leaving the movement path of the locking tooth 221, the gear 22 can rotate freely relative to the rotating shaft 23. During the upward movement, there is no need to overcome the friction between the rotating shaft 23 and the movable seat 21, so the user can adjust the height of the monitor with a small force. When the gear 22 descends along the rack 12, the locking tooth 221 can push the lever 242 to rotate towards the side closer to the locking block 241, so that the locking tooth 221, lever 242 and locking block 241 abut against each other in sequence, and the gear 22 and the rotating shaft 23 rotate synchronously. During the descent, the friction between the rotating shaft 23 and the movable seat 21 can support the monitor. The user only needs to provide external force to overcome this friction to lower the height of the monitor. Since there is no need to set a constant force spring, the space occupied is reduced, the volume is reduced and the cost is relatively lower.

[0035] In one embodiment of this implementation, please refer to Figure 4 and Figure 6 , Figure 6 yes Figure 4 A schematic diagram of the structure of the movable mechanism 20 in cross-section. The gear 22 has a rotating hole 2201, the linkage block 24 is rotatably engaged with the rotating hole 2201, the retaining tooth 221 is formed on the inner wall of the rotating hole 2201, one end face of the linkage block 24 is provided with a retaining block 241 and a lever block 242, and abuts against the retaining tooth 221, and the other end face of the linkage block 24 abuts against the movable seat 21. With this configuration, on the one hand, the gear 22 can rotate with the shaft 23 through the linkage block 24, and the linkage block 24 is installed inside the gear 22, saving space and reducing the size of the bracket. On the other hand, the locking block 241 and the shifting block 242 are located on one end face of the linkage block 24, and the locking tooth 221 is located on the inner wall of the rotating hole 2201, so that the locking block 241, the shifting block 242 and the locking tooth 221 are in the same plane, which makes it easy for the locking tooth 221 to push the shifting block 242 or for the locking block 241 and the shifting block 242 to block the locking tooth 221. Also, one end face of the linkage block 24 abuts against the locking tooth 221, and the other end face abuts against the movable seat 21. Thus, the contact between the linkage block 24 and the movable seat 21 and the contact between the linkage block 24 and the locking tooth 221 can provide friction to the shaft 23.

[0036] In one embodiment of this implementation, please refer to Figure 4 and Figure 6 The movable mechanism 20 includes a mating block 25, which is circumferentially fixedly fitted onto the rotating shaft 23 and rotatably engages with the rotating hole 2201. One end face of the mating block 25 abuts against the retaining tooth 221, and the other end face abuts against the movable seat 21. This arrangement, on the one hand, saves space by installing the mating block 25 inside the gear 22, while providing a more stable rotational engagement for the gear 22. On the other hand, the contact between one end face of the mating block 25 and the retaining tooth 221, and the contact between the mating block 25 and the movable seat 21, provides friction to the rotating shaft 23 through the contact between the mating block 25 and the movable seat 21 and the contact between the mating block 25 and the retaining tooth 221, further improving the load-bearing capacity of the display. Furthermore, the mating block 25, together with the linkage block 24, can axially limit the gear 22, preventing the gear 22 from wobbling during lifting and lowering.

[0037] In one embodiment of this implementation, please refer to Figure 6 and Figure 8 , Figure 8 yes Figure 2The diagram shows the rotating shaft 23, the movable seat 21, and other related components in the movable mechanism 20 from another perspective in their disassembled state. The movable seat 21 is provided with a first friction plate 211 that abuts against the mating block 25. This arrangement allows the friction between the mating block 25 and the movable seat 21 to be further increased by the first friction plate 211.

[0038] In one embodiment of this implementation, please refer to Figure 6 and Figure 7 , Figure 7 yes Figure 2 The diagram shows the disassembled structure of the rotating shaft 23, the movable seat 21, and other related components in the movable mechanism 20. The movable seat 21 is provided with a second friction plate 212 that abuts against the linkage block 24. This arrangement allows the friction between the linkage block 24 and the movable seat 21 to be further increased by the second friction plate 212.

[0039] In one embodiment of this implementation, please refer to Figure 4 The movable mechanism 20 includes a rotating rod 26, one end of which is connected to a mating block 25, and the other end is connected to a linkage block 24. A lever 242 is rotatably fitted onto the rotating rod 26. This arrangement allows for relative rotation between the lever 242 and the linkage block 24, and improves the connection strength between the mating block 25, the linkage block 24, and the rotating shaft 23.

[0040] In this embodiment, both the mating block 25 and the linkage block 24 are provided with mounting grooves 2401, the rotating rod 26 extends axially, and both ends of the rotating rod 26 are respectively installed in the corresponding mounting grooves 2401.

[0041] In one embodiment of this implementation, please refer to Figure 4 , Figures 6 to 8 The rotating shaft 23 includes a shaft body 231 and an adjusting member 232. One end of the shaft body 231 abuts against the outer side of the movable seat 21, and the other end passes through the movable seat 21 and the linkage block 24, and cooperates with the adjusting member 232. The adjusting member 232 is used to adjust the pressure between the shaft body 231 and the movable seat 21. This arrangement can, on the one hand, increase the friction between the rotating shaft 23 and the movable seat 21 by contacting the outer side of the movable seat 21, and on the other hand, adjust the magnitude of this friction by adjusting the adjusting member 232 to avoid excessive friction, which would make adjustment difficult, and to avoid insufficient friction, which would prevent the display from being supported.

[0042] In this embodiment, the adjusting member 232 is constructed as a nut, and the shaft 231 is constructed as a screw. The head of the screw abuts against one side of the movable seat 21, and the shank of the screw passes through the movable seat 21. The nut abuts against the other side of the movable seat 21 and is threadedly engaged with it. The user can adjust the pressure between the rotating shaft 23 and the movable seat 21 by rotating the nut, thereby adjusting the friction between the rotating shaft 23 and the movable seat 21. It should be noted that the screw is rotatably engaged with the movable seat 21, and is axially fixedly engaged with the mating block 25 and the linkage block 24.

[0043] In one embodiment of this implementation, please refer to Figure 4 , Figure 6 and Figure 8 In order to increase the friction between the rotating shaft 23 and the movable seat 21, the movable mechanism 20 includes a first friction block 27. A boss 2311 is formed at the end of the shaft 231 away from the adjusting member 232. The first friction block 27 is sleeved on the shaft 231 and located between the boss 2311 and the movable seat 21.

[0044] In this embodiment, in order to further improve the friction between the rotating shaft 23 and the movable seat 21, the movable seat 21 is provided with a third friction plate 213 that abuts against the first friction block 27.

[0045] In this embodiment, the movable mechanism 20 further includes a gasket, which is sleeved on the shaft 231 and located between the first friction block 27 and the boss 2311. It can be understood that the boss 2311 can provide stable pressure to the first friction block 27 through the gasket, so that the first friction block 27 can fully fit with the third friction plate 213.

[0046] In one embodiment of this implementation, please refer to Figure 4 , Figure 6 and Figure 7 In order to increase the friction between the rotating shaft 23 and the movable seat 21, the movable mechanism 20 includes a second friction block 28, which is sleeved on the shaft 231 and located between the adjusting member 232 and the movable seat 21.

[0047] In this embodiment, in order to further improve the friction between the rotating shaft 23 and the movable seat 21, the movable seat 21 is provided with a fourth friction plate 214 that abuts against the second friction block 28.

[0048] In one embodiment of this implementation, please refer to Figure 5The locking tooth 221 includes a clearance surface 2211 and an abutment surface 2212. The clearance surface 2211 is used to abut against the lever 242 when the gear 22 rises along the rack 12, and the clearance surface 2211 is perpendicular to the radial direction. The abutment surface 2212 is used to abut against the lever 242 when the gear 22 falls along the rack 12, and the abutment surface 2212 is parallel to the radial direction. It can be understood that the clearance surface 2211, which is perpendicular to the radial direction, can better avoid the lever 242 after it is pushed, while the abutment surface 2212, which is parallel to the radial direction, can better abut against the lever 242 after it is pushed.

[0049] In one embodiment of this implementation, please refer to Figure 4 and Figure 5 There are multiple locking teeth 221, levers 242, and locking blocks 241, and they are set up one-to-one. This setting can, on the one hand, ensure sufficient contact between the linkage block 24 and the gear 22 to better support the monitor, and on the other hand, reduce the height at which the monitor will automatically fall after the height is adjusted to the correct position (when the monitor height is adjusted to the correct position, the gear 22 will descend a certain height along the rack 12 under the influence of the monitor's gravity).

[0050] In this embodiment, there are four of each of the following: the locking teeth 221, the prying blocks 242, and the locking blocks 241. The four sets of locking teeth 221, prying blocks 242, and locking blocks 241 are arranged in a 90-degree array along the circumferential direction.

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A monitor lifting bracket (100), characterized in that, include: The fixing mechanism (10) includes a fixing seat (11) and a rack (12) disposed on the fixing seat (11); The active mechanism (20) includes an active seat (21), a gear (22), a rotating shaft (23), and a linkage block (24). The rotating shaft (23) is rotatably engaged with the active seat (21) and has friction between them that can support the display. The linkage block (24) is circumferentially fixedly disposed on the rotating shaft (23). The gear (22) is rotatably engaged with the rotating shaft (23) and meshes with the rack (12). The gear (22) is provided with a locking tooth (221). The linkage block (24) is provided with a relatively fixed locking block (241) and a relatively rotatable lever block (242). The locking block (241) and the lever block (242) are adjacent in the circumferential direction. When the gear (22) rises along the rack (12), the locking tooth (221) can push the lever (242) to rotate away from the locking block (241), so that the lever (242) leaves the movement path of the locking tooth (221), and the gear (22) and the rotating shaft (23) rotate relative to each other; when the gear (22) descends along the rack (12), the locking tooth (221) can push the lever (242) to rotate closer to the locking block (241), so that the locking tooth (221), the lever (242) and the locking block (241) abut in sequence, and the gear (22) and the rotating shaft (23) rotate synchronously.

2. The monitor lifting bracket (100) according to claim 1, characterized in that, The gear (22) has a rotating hole (2201), the linkage block (24) is rotatably engaged with the rotating hole (2201), the locking tooth (221) is formed on the inner wall of the rotating hole (2201), one end face of the linkage block (24) is provided with the locking block (241) and the shifting block (242), and abuts against the locking tooth (221), and the other end face of the linkage block (24) abuts against the movable seat (21).

3. The monitor lifting bracket (100) according to claim 2, characterized in that, The movable mechanism (20) includes a mating block (25), which is circumferentially fixedly sleeved on the rotating shaft (23) and rotates in cooperation with the rotating hole (2201). One end face of the mating block (25) abuts against the locking tooth (221), and the other end face of the mating block (25) abuts against the movable seat (21).

4. The monitor lifting bracket (100) according to claim 3, characterized in that, The movable seat (21) is provided with a first friction plate (211) that abuts against the mating block (25); and / or, the movable seat (21) is provided with a second friction plate (212) that abuts against the linkage block (24).

5. The monitor lifting bracket (100) according to claim 3, characterized in that, The active mechanism (20) includes a rotating rod (26), one end of which is connected to the mating block (25) and the other end is connected to the linkage block (24). The lever block (242) is rotatably sleeved on the rotating rod (26).

6. The monitor lifting bracket (100) according to claim 1, characterized in that, The rotating shaft (23) includes a shaft body (231) and an adjusting member (232). One end of the shaft body (231) abuts against the outside of the movable seat (21), and the other end passes through the movable seat (21) and the linkage block (24) and cooperates with the adjusting member (232). The adjusting member (232) is used to adjust the pressure between the shaft body (231) and the movable seat (21).

7. The monitor lifting bracket (100) according to claim 6, characterized in that, The movable mechanism (20) includes a first friction block (27), and a boss (2311) is formed at one end of the shaft (231) away from the adjusting member (232). The first friction block (27) is sleeved on the shaft (231) and located between the boss (2311) and the movable seat (21).

8. The monitor lifting bracket (100) according to claim 6, characterized in that, The movable mechanism (20) includes a second friction block (28), which is sleeved on the shaft (231) and located between the adjusting member (232) and the movable seat (21).

9. The monitor lifting bracket (100) according to claim 1, characterized in that, The locking tooth (221) includes a clearance surface (2211) and an abutment surface (2212). The clearance surface (2211) is used to abut against the lever (242) when the gear (22) rises along the rack (12). The clearance surface (2211) is perpendicular to the radial direction. The abutment surface (2212) is used to abut against the lever (242) when the gear (22) descends along the rack (12). The abutment surface (2212) is parallel to the radial direction.

10. The monitor lifting bracket (100) according to claim 1, characterized in that, The number of each of the locking teeth (221), the pry block (242), and the locking block (241) is multiple, and they are set in a one-to-one correspondence.

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