A drawing display column for urban and rural planning

Abstract

The utility model discloses a kind of drawing display columns for urban and rural planning, it is related to drawing display column technical field, including door frame, support foot and display board, the quantity of support foot is two, and is respectively arranged in the lower end of the left and right sides of the door frame, the display board is set in the upper end in the door frame interior, and with the door frame fixed connection.The utility model is through the cooperation of the use of door frame, protective roof, support foot, mounting groove, encapsulation board, display board, acrylic transparent box, positioning member, shaft rod, fixed seat, rotating plate, torsional spring, adjusting support device, expansion support assembly, movable plate, support block, adjusting mechanism, linkage assembly, screw rod, worm wheel, screw block, drive self-locking assembly, worm, crank handle and rubber non-slip mat, flexible adjusting support area is realized to adapt indoor and outdoor scene, avoid outdoor dumping risk, fixed drawing without adhesive tape simultaneously and without adhesive mark, the effect of protecting drawing integrity.

Description

Technical Field

[0001] This utility model relates to the technical field of drawing display panels, specifically a drawing display panel for urban and rural planning. Background Technology

[0002] In urban and rural planning, drawings serve as the core carrier for presenting planning schemes and conveying spatial layout concepts. Their display effect directly affects the communication of schemes, public participation, and decision-making efficiency. Urban and rural planning drawing display boards, as equipment specifically designed to carry and present such drawings, are widely used in indoor and outdoor scenarios such as urban and rural construction command centers, community publicity areas, and project construction sites. They are an important medium connecting planning and design with the public and construction teams. However, existing blueprint display stands, when used outdoors, mostly have fixed support legs with no adjustable support area. They are prone to tilting and falling over due to insufficient support in the event of gusts of wind, which may damage the blueprints and pose a safety hazard. If the support legs are directly added, it will take up too much space when used indoors, affecting passage and flexible use of space. In addition, when fixing the blueprints, the tape will leave adhesive residue that damages the blueprints. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a display board for urban and rural planning drawings. This board features adjustable support area to suit indoor and outdoor environments, avoiding the risk of tipping over outdoors. It also eliminates the need for tape to secure the drawings without leaving adhesive residue, thus protecting the integrity of the drawings. This design improves upon or solves the problems of existing display boards where, when used outdoors, the support legs are mostly fixed structures with no adjustable support area. These boards are prone to tipping over in strong winds due to insufficient support, potentially damaging the drawings and posing safety hazards. Adding support legs indoors would occupy too much space, hindering passage and flexible space utilization. Furthermore, tape application can leave adhesive residue that damages the drawings.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a display panel for urban and rural planning drawings, comprising a door frame, supporting legs, and a display panel. Two supporting legs are respectively positioned at the lower ends of the left and right sides of the door frame. The display panel is positioned inside the upper part of the door frame and is fixedly connected to it. A protective canopy is fixedly connected to the top of the door frame. Several acrylic transparent boxes are fixedly connected to the front surface of the display panel, with the upper ends of the acrylic transparent boxes being open. Several positioning elements are evenly arranged above the acrylic transparent boxes, and these positioning elements are fixedly connected to the upper surface of the front surface of the display panel. Each of the two supporting legs has a mounting groove on its upper surface. A sealing plate is fixedly connected to the upper end of each of the two mounting grooves, and the sealing plate is flush with the upper surface of the supporting legs and its upper side is fixedly connected to the bottom end of the door frame. Adjustable support devices are provided inside each of the two mounting grooves. The adjustable support device includes an extended support assembly and an adjustment mechanism. There are two extended support assemblies, which are respectively arranged at the front and rear ends inside the placement groove. The adjustment mechanism is arranged at the lower end inside the placement groove.

[0005] In a preferred embodiment of this invention, the positioning component includes a shaft, a fixed base, a rotating plate, and a torsion spring. The shaft is positioned above the acrylic transparent box. There are two fixed bases, which are respectively fixedly connected to the left and right end surfaces of the shaft and respectively fixedly connected to the front surface of the display plate. The rotating plate is sleeved on the surface of the shaft and rotatably connected to the shaft. There are two torsion springs, which are respectively sleeved on the left and right end surfaces of the shaft. The ends of the two torsion springs that are close to each other are fixedly connected to the left and right side surfaces of the rotating plate, and the ends that are far apart from each other are fixedly connected to the side surfaces of the two fixed bases that are close to each other.

[0006] As a preferred embodiment of this utility model, a rubber anti-slip pad is fixedly connected to the lower end of the rotating plate on the side surface near the display plate.

[0007] As a preferred embodiment of the present invention, the extended support assembly includes a movable plate and a support block. The two movable plates are respectively disposed at the front and rear ends inside the mounting groove. The ends of the two movable plates that are far apart from each other extend from the front and rear ends of the support foot and are slidably connected to the support foot. The two support blocks are respectively fixedly connected to the ends of the two movable plates that extend from the support foot.

[0008] In a preferred embodiment of the present invention, the adjustment mechanism includes a linkage component and a drive self-locking component. The linkage component is disposed below the two movable plates, and the drive self-locking component is disposed on the upper side of the middle end of the linkage component.

[0009] In a preferred embodiment of this invention, the linkage assembly includes a screw, a worm gear, and threaded blocks. The screw is positioned below the two movable plates, and both its front and rear ends are rotatably connected to the support feet. The worm gear is sleeved on the middle end of the screw and fixedly connected to it. There are two threaded blocks, which are respectively sleeved on the front and rear end surfaces of the screw and threadedly connected to it. The threads on the front and rear end surfaces of the screw have opposite directions of rotation. The two threaded blocks are fixedly connected to the lower surfaces of the two movable plates that are close to each other.

[0010] As a preferred embodiment of this utility model, the self-locking drive assembly includes a worm and a crank handle. The worm is disposed on the upper side of the worm wheel and meshes with the worm wheel. Both ends of the worm are rotatably connected to the support foot, and the support foot extends from the left end. The crank handle is fixedly connected to the left end of the worm.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the combined use of a door frame, protective canopy, support feet, mounting groove, encapsulation plate, display board, acrylic transparent box, positioning component, shaft, fixed seat, rotating plate, torsion spring, adjusting support device, extended support assembly, movable plate, support block, adjusting mechanism, linkage assembly, screw, worm gear, threaded block, drive self-locking assembly, worm, crank handle, and rubber anti-slip pad, improves or solves to a certain extent the problems of existing drawing display boards. When used outdoors, the support feet are mostly fixed structures, and the support area cannot be adjusted. In the event of gusts of wind, they are prone to tilting and falling due to insufficient support, which may damage the drawings and pose a safety hazard. If the support foot area is directly increased, it will occupy too much space when used indoors, affecting passage and flexible use of space. Moreover, when fixing the drawings, the tape will leave adhesive residue that damages the drawings.

[0012] 2. This utility model enables quick fixing and replacement of drawings by setting positioning components, which not only prevents the drawings from shifting or falling out due to external forces, but also prevents the drawings from being scratched or leaving adhesive residue, thus ensuring the integrity of the drawings.

[0013] 3. This utility model, by setting up an extended support component and an adjustment mechanism, can flexibly adjust the support area of ​​the support foot. When unfolded outdoors, it can improve wind resistance and stability, and when retracted indoors, it can reduce the footprint. Moreover, the worm gear structure has self-locking properties, which can stably maintain the support state. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the drawing display panel of this utility model; Figure 2 This is an exploded 3D structural diagram of the drawing display panel; Figure 3 An exploded three-dimensional structural diagram of the positioning component; Figure 4 A schematic diagram of the exploded three-dimensional structure supporting the legs; Figure 5 A schematic diagram of the exploded three-dimensional structure for adjusting the support device.

[0015] In the diagram: 1. Door frame; 101. Protective canopy; 2. Support leg; 21. Installation slot; 22. Encapsulation plate; 3. Display plate; 31. Acrylic transparent box; 4. Positioning component; 41. Shaft; 42. Fixing base; 43. Rotating plate; 44. Torsion spring; 5. Adjustable support device; 6. Extended support assembly; 61. Movable plate; 62. Support block; 7. Adjustment mechanism; 71. Linkage assembly; 711. Screw; 712. Worm gear; 713. Threaded block; 72. Drive self-locking assembly; 721. Worm gear; 722. Crank handle; 8. Rubber anti-slip pad. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0019] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0020] Example 1 Reference Figure 1-5 This is the first embodiment of the present utility model, which provides a display board for urban and rural planning drawings, including a door frame 1, support legs 2 and display board 3. There are two support legs 2, which are respectively set at the lower ends of the left and right sides of the door frame 1. The display board 3 is set at the upper end of the door frame 1 and is fixedly connected to the door frame 1. A protective canopy 101 is fixedly connected to the top of the door frame 1. Several acrylic transparent boxes 31 are fixedly connected to the front surface of the display board 3. The upper end of the acrylic transparent boxes 31 is an open end. Several positioning parts 4 are evenly arranged above the acrylic transparent boxes 31. The positioning parts 4 are fixedly connected to the upper side of the front surface of the display board 3. The upper surface of the two support legs 2 is provided with a mounting groove 21. The upper end of the two mounting grooves 21 is fixedly connected to a sealing plate 22. The sealing plate 22 is flush with the upper surface of the support legs 2 and its upper side is fixedly connected to the bottom end of the door frame 1. An adjustment support device 5 is provided inside the two mounting grooves 21. The adjustment support device 5 includes an extension support assembly 6 and an adjustment mechanism 7. There are two extension support assemblies 6, which are respectively located at the front and rear ends inside the placement groove 21. The adjustment mechanism 7 is located at the lower end inside the placement groove 21.

[0021] Specifically, this display panel can be flexibly adapted to indoor and outdoor scenarios. It can improve outdoor wind resistance stability by adjusting the support legs 2, and can also retract the support structure to reduce indoor footprint. At the same time, it is easy to replace drawings without damaging them.

[0022] Furthermore, the acrylic transparent box 31 works with the positioning component 4 to enable quick fixing and replacement of drawings, the adjustment mechanism 7 drives the expansion support component 6 to unfold or retract, and the protective canopy 101 provides top protection for the display board 3 and drawings. All components work together to meet the display needs in different scenarios.

[0023] Example 2 In the second embodiment of this utility model, the positioning component 4 includes a shaft 41, a fixed seat 42, a rotating plate 43, and a torsion spring 44. The shaft 41 is positioned above the acrylic transparent box 31. There are two fixed seats 42, which are respectively fixedly connected to the left and right end surfaces of the shaft 41, and their rear sides are fixedly connected to the front surface of the display plate 3. The middle end of the rotating plate 43 is sleeved on the surface of the shaft 41 and is rotatably connected to the shaft 41. There are two torsion springs 44, which are respectively sleeved on the left and right end surfaces of the shaft 41. The ends of the two torsion springs 44 that are close to each other are fixedly connected to the left and right side surfaces of the rotating plate 43, and the ends that are far apart from each other are fixedly connected to the side surfaces of the two fixed seats 42 that are close to each other. A rubber anti-slip pad 8 is fixedly connected to the lower end of the rotating plate 43 on the side surface near the display plate 3.

[0024] Specifically, by setting the positioning component 4, the drawings can be quickly fixed and replaced, which not only prevents the drawings from shifting or falling out due to external forces, but also prevents the drawings from being scratched or leaving adhesive residue, thus ensuring the integrity of the drawings.

[0025] Furthermore, pressing the upper end of the rotating plate 43 causes it to rotate around the shaft 41 and compress the torsion spring 44. After inserting the drawing, releasing the rotating plate 43 causes the torsion spring 44 to return to its original position, causing the rubber anti-slip pad 8 at the lower end of the rotating plate 43 to adhere to the surface of the drawing, thus cooperating with the display plate 3 to clamp and position the drawing. To replace the drawing, pressing the rotating plate 43 again removes it. Example 3 In the third embodiment of this utility model, the extended support assembly 6 includes a movable plate 61 and a support block 62. The two movable plates 61 are respectively disposed at the front and rear ends inside the mounting groove 21. The ends of the two movable plates 61 that are far apart from each other extend out of the support legs 2 from the front and rear ends of the support legs 2 and are slidably connected to the support legs 2. The two support blocks 62 are respectively fixedly connected to the ends of the two movable plates 61 that extend out of the support legs 2. The adjustment mechanism 7 includes a linkage component 71 and a drive self-locking component 72. The linkage component 71 is located below the two movable plates 61, and the drive self-locking component 72 is located on the upper side of the middle of the linkage component 71. The linkage assembly 71 includes a screw 711, a worm gear 712, and a threaded block 713. The screw 711 is located below the two movable plates 61, and both its front and rear ends are rotatably connected to the support feet 2. The worm gear 712 is sleeved on the middle end of the screw 711 and is fixedly connected to the screw 711. There are two threaded blocks 713, which are respectively sleeved on the front and rear end surfaces of the screw 711 and are threadedly connected to the screw 711. The threads on the front and rear end surfaces of the screw 711 have opposite directions of rotation. The two threaded blocks 713 are fixedly connected to the lower surfaces of the two movable plates 61 that are close to each other. The self-locking drive assembly 72 includes a worm 721 and a crank 722. The worm 721 is located on the upper side of the worm wheel 712 and is meshed with the worm wheel 712. Both the left and right ends of the worm 721 are rotatably connected to the support foot 2, and the support foot 2 extends from the left end. The crank 722 is fixedly connected to the left end of the worm 721.

[0026] Specifically, by setting up the extended support component 6 in conjunction with the adjustment mechanism 7, the support area of ​​the support foot 2 can be flexibly adjusted. When deployed outdoors, it can improve wind resistance and stability, and when retracted indoors, it can reduce the footprint. Furthermore, the worm gear 721 and worm wheel 712 structure have self-locking properties, which can stably maintain the support state.

[0027] Furthermore, rotating the crank 722 drives the worm 721 to rotate, and the worm 721 engages with and drives the worm wheel 712 and the screw 711 to rotate. Because the threads at both ends of the screw 711 rotate in opposite directions, it will drive the two threaded blocks 713 to move in the opposite direction along the screw 711, thereby pushing the movable plate 61 to slide out of the mounting slot 21, and the support block 62 to unfold, or pull the movable plate 61 to retract. At the same time, the self-locking characteristics of the worm 721 and the worm wheel 712 can prevent the screw 711 from rotating on its own, ensuring that the support structure maintains a stable position after adjustment.

[0028] Working principle: When placing the drawing, align the drawing with the open end of the acrylic transparent box 31 from top to bottom and insert it. At this time, the acrylic transparent box 31 can provide stable positioning for both sides of the drawing. Then, press the upper end of the rotating plate 43 in the positioning component 4 backward, causing the rotating plate 43 to rotate around the shaft 41 and compress the torsion spring 44. After the drawing is fully inserted into the acrylic transparent box 31, release the rotating plate 43. The torsion spring 44 returns to its original deformation and drives the rotating plate 43 to reset, so that the rubber anti-slip pad 8 at the lower end of the rotating plate 43 is tightly attached to the upper surface of the drawing, cooperating with the display plate 3. For clamping and positioning the drawings, the rubber anti-slip pad 8 not only increases the friction between the drawing and the drawing, preventing the drawing from being pushed upwards or falling out of the acrylic transparent box 31 due to external forces such as slight wind or accidental touch, but also prevents the rotating plate 43 from directly contacting the drawing and causing scratch damage. At the same time, there is no need to use tape, clips or other additional fasteners. When changing the drawing later, you only need to press the rotating plate 43 again to take out the old drawing. The operation is convenient and will not leave glue residue on the drawing surface or cause structural damage, effectively ensuring the integrity of the drawing and the efficiency of replacement. When used outdoors, rotating the crank 722 on the outside of the support foot 2 drives the worm 721 to rotate synchronously. Because the worm 721 meshes with the worm wheel 712 in the mounting groove 21, the rotation of the worm 721 drives the worm wheel 712 and the screw 711 fixed thereto to rotate. Since the threads at the front and rear ends of the screw 711 turn in opposite directions and are respectively fitted with threaded blocks 713 fixedly connected to the movable plate 61, the rotation of the screw 711 drives the two threaded blocks 713 to move away from each other along the axial direction of the screw 711, thereby pushing the movable plate 61 to slide out from the front and rear ends of the support foot 2, causing the support block 62 at the end of the movable plate 61 to unfold. At this time, the support foot 2 and the unfolded The movable plate 61 and the support block 62 together form a larger support area, significantly improving the overall support and stability of the display panel, effectively resisting outdoor wind interference, and preventing the display panel from tilting or falling over. When switching to indoor use, the crank 722 is turned in the opposite direction, which drives the screw 711 to rotate in the opposite direction through the worm 721 and worm wheel 712. This causes the two threaded blocks 713 to move closer to each other along the axial direction of the screw 711, pulling the movable plate 61 back into the mounting groove 21 of the support foot 2. The support block 62 then fits against the outer wall of the support foot 2, greatly reducing the floor space occupied by the display panel, avoiding taking up too much indoor space, and ensuring smooth indoor passage and flexible use of space.

[0029] In summary, by using the door frame 1, protective canopy 101, support feet 2, mounting groove 21, encapsulation plate 22, display plate 3, acrylic transparent box 31, positioning component 4, shaft 41, fixing seat 42, rotating plate 43, torsion spring 44, adjusting support device 5, extended support assembly 6, movable plate 61, support block 62, adjusting mechanism 7, linkage assembly 71, screw 711, worm gear 712, threaded block 713, drive self-locking assembly 72, worm gear 721, crank handle 722, and rubber anti-slip pad 8 in combination, the support area can be flexibly adjusted to adapt to indoor and outdoor scenarios, avoiding the risk of outdoor tipping. At the same time, the drawings can be fixed without tape and without leaving adhesive residue, thus protecting the integrity of the drawings.

[0030] The screw 711, worm gear 712, and worm 721 used in this application can be additionally equipped with protective measures of common knowledge in the art under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are commonly used by those skilled in the art.

[0031] It should be noted that the screw 711, worm gear 712 and worm 721 are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0032] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0033] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0034] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A display panel for urban and rural planning drawings, comprising a door frame (1), supporting legs (2), and a display panel (3), wherein there are two supporting legs (2), which are respectively disposed at the lower ends of the left and right sides of the door frame (1), and the display panel (3) is disposed at the upper end of the door frame (1) and is fixedly connected to the door frame (1), characterized in that: The top of the door frame (1) is fixedly connected to a protective canopy (101). Several acrylic transparent boxes (31) are fixedly connected to the front surface of the display board (3). The upper end of the acrylic transparent box (31) is an open end. Several positioning parts (4) are evenly arranged above the several acrylic transparent boxes (31). The positioning parts (4) are fixedly connected to the upper side of the front surface of the display board (3). The upper surface of the two support legs (2) is provided with a mounting groove (21). The upper end of the two mounting grooves (21) is fixedly connected to a sealing plate (22). The sealing plate (22) is flush with the upper surface of the support leg (2) and its upper side is fixedly connected to the bottom end of the door frame (1). The two mounting grooves (21) are provided with an adjustment support device (5). The adjustment support device (5) includes an extension support assembly (6) and an adjustment mechanism (7). There are two extension support assemblies (6), which are respectively located at the front and rear ends inside the placement groove (21). The adjustment mechanism (7) is located at the lower end inside the placement groove (21).

2. The urban and rural planning drawing display board according to claim 1, characterized in that: The positioning component (4) includes a shaft (41), a fixed seat (42), a rotating plate (43), and a torsion spring (44). The shaft (41) is positioned above the acrylic transparent box (31). There are two fixed seats (42), which are fixedly connected to the left and right ends of the shaft (41) respectively, and their rear sides are fixedly connected to the front surface of the display plate (3). The middle end of the rotating plate (43) is sleeved on the surface of the shaft (41) and rotatably connected to the shaft (41). There are two torsion springs (44), which are sleeved on the left and right ends of the shaft (41) respectively. The ends of the two torsion springs (44) that are close to each other are fixedly connected to the left and right sides of the rotating plate (43) respectively, and the ends that are far apart from each other are fixedly connected to the side surfaces of the two fixed seats (42) that are close to each other respectively.

3. The urban and rural planning drawing display board according to claim 2, characterized in that: A rubber anti-slip pad (8) is fixedly connected to the lower end of the rotating plate (43) on the side surface near the display plate (3).

4. The urban and rural planning drawing display board according to claim 1, characterized in that: The extended support assembly (6) includes a movable plate (61) and a support block (62). The two movable plates (61) are respectively disposed at the front and rear ends inside the mounting groove (21). The ends of the two movable plates (61) that are far apart from each other extend out of the support foot (2) from the front and rear ends of the support foot (2) and are slidably connected to the support foot (2). The two support blocks (62) are respectively fixedly connected to the ends of the two movable plates (61) that extend out of the support foot (2).

5. A display panel for urban and rural planning drawings according to claim 4, characterized in that: The adjustment mechanism (7) includes a linkage component (71) and a drive self-locking component (72). The linkage component (71) is located below the two movable plates (61), and the drive self-locking component (72) is located on the upper side of the middle end of the linkage component (71).

6. The urban and rural planning drawing display board according to claim 5, characterized in that: The linkage assembly (71) includes a screw (711), a worm gear (712), and threaded blocks (713). The screw (711) is located below the two movable plates (61) and is rotatably connected to the support foot (2) at both ends. The worm gear (712) is sleeved on the middle end of the screw (711) and is fixedly connected to the screw (711). There are two threaded blocks (713), which are respectively sleeved on the front and rear end surfaces of the screw (711) and threadedly connected to the screw (711). The threads on the front and rear end surfaces of the screw (711) are in opposite directions. The two threaded blocks (713) are fixedly connected to the lower surfaces of the two movable plates (61) that are close to each other.

7. A display panel for urban and rural planning drawings according to claim 6, characterized in that: The self-locking drive assembly (72) includes a worm (721) and a crank (722). The worm (721) is located on the upper side of the worm wheel (712) and is meshed with the worm wheel (712). Both the left and right ends of the worm (721) are rotatably connected to the support foot (2), and the left end extends out of the support foot (2). The crank (722) is fixedly connected to the left end of the worm (721).

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