Rainproof drawing table for outdoor topographic surveying

Abstract

This utility model discloses a rainproof drawing workbench for outdoor topographic surveying, belonging to the technical field of surveying workbench. Its key technical features include two symmetrically arranged positioning frames, which are rotatably connected by a first hinge. Each positioning frame has a cover plate rotatably connected to its surface by a second hinge. This utility model achieves rapid rainwater drainage and sealing of the double cover plate gaps through the beveled design of the triangular transparent acrylic cover plate combined with a sealing strip structure. By employing a sliding rail positioning rod and elastic scraper linkage system, dynamic locking is achieved through pressure applied by pressure blocks. Combined with the deformation characteristics of high-fiber plastic, this ensures minimal flatness error in the drawing, significantly improving surveying accuracy. The support legs utilize a four-link folding structure, coupled with a pin positioning system, resulting in a short unfolding time.

Description

Technical Field

[0001] This utility model belongs to the technical field of surveying workbench, specifically relating to a rainproof drawing workbench for outdoor topographic surveying. Background Technology

[0002] Architectural design is of paramount importance in the construction industry, and surveying instruments capable of precise positioning are of utmost importance. A surveying instrument is a set of instruments and devices designed and manufactured for surveying operations, used for data acquisition, processing, and output. Currently, surveyors working outdoors need to carry many surveying tools and draw the data obtained from these tools onto drawings. Sometimes, they even need to draw drawings on hillsides, which is challenging due to the complex and ever-changing outdoor environment.

[0003] A search revealed Chinese patent CN212678625U, which discloses a portable field topographic mapping workbench. The workbench includes a drawing board with threaded connecting sleeves fixedly connected to the four corners of its lower surface. Each threaded connecting sleeve has a threaded connector at its lower end, ensuring the workbench's final levelness and reducing its footprint for easy portability. However, this patent still has the following drawbacks: outdoor weather conditions are unpredictable, and it's difficult to prevent the drawings from getting wet during viewing. Utility Model Content

[0004] The purpose of this invention is to provide a rainproof drawing workbench for outdoor topographic surveying, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rainproof drawing workbench for outdoor topographic surveying, comprising two symmetrically arranged positioning frames, which are rotatably connected by a first hinge, and each positioning frame has a cover plate rotatably connected to its surface by a second hinge, wherein a sealing strip is fixedly connected to one end of the cover plate facing the other cover plate, and the sealing strip covers the surface of the other cover plate.

[0006] Preferably, the cover plate has a triangular structure with the inclined surface at the top, and the ends of the two cover plates that are far apart from each other slope downwards.

[0007] Preferably, each of the cover plates has a retaining plate rotatably connected to both sides via bearings. The positioning frame is provided with a positioning knob at a position corresponding to the retaining plate. The positioning knob is slidably connected to the positioning frame. The positioning knob is composed of a cylindrical structure and an elliptical structure. The retaining plate has a positioning groove inside that corresponds to the shape of the positioning knob.

[0008] Preferably, each positioning frame has a groove on its inner wall, and a positioning rod is provided inside the positioning frame. The two ends of the positioning rod are respectively inserted into the two grooves and are slidably connected to the positioning frame through the grooves. A scraper is fixedly connected to the bottom surface of the positioning rod, and the scraper is inclined. A pressure block is fixedly connected to the top surface of the positioning rod.

[0009] Preferably, the bottom surface of each positioning frame is rotatably connected to a support leg via a bearing seat, the surface of the support leg is rotatably connected to a limit rod, the bottom surface of the positioning frame is fixedly connected to a positioning shell, the end of the limit rod away from the support leg is fixedly connected to an insert block, the insert block is inserted into the interior of the positioning shell, the surface of the positioning shell is slidably connected to a pin, and the pin passes through the insert block.

[0010] Preferably, each of the positioning frames has two positioning rings symmetrically fixedly connected to both sides.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model achieves rapid rainwater diversion and double-cover gap sealing by combining the inclined surface design of the triangular transparent acrylic cover with the sealing strip structure.

[0013] 2. This utility model employs a sliding rail positioning rod and elastic scraper linkage system, achieving dynamic locking through pressure applied by pressure blocks. Combined with the deformation characteristics of high-fiber plastic, it ensures minimal flatness error in the drawings, significantly improving surveying accuracy.

[0014] 3. This utility model adopts a four-link folding structure for the support legs, combined with a pin positioning system, which shortens the unfolding time. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the positioning shell and insert block structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the slide groove and positioning rod structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the positioning rod and scraper structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the positioning knob and clamping plate structure of this utility model.

[0020] In the diagram: 1. Positioning frame; 2. First hinge; 3. Cover plate; 4. Sealing strip; 5. Second hinge; 6. Positioning torque; 7. Clamping plate; 8. Slide groove; 9. Positioning rod; 10. Pressure block; 11. Scraper; 12. Limiting rod; 13. Positioning shell; 14. Insert block; 15. Pin; 16. Positioning ring; 17. Support leg. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 This utility model provides a rainproof drawing workbench for outdoor topographic surveying, including two symmetrically arranged positioning frames 1, which are rotatably connected by a first hinge 2. Each positioning frame 1 has a cover plate 3 rotatably connected to its surface by a second hinge 5. A sealing strip 4 is fixedly connected to one end of the cover plate 3 facing the other cover plate 3, covering the surface of the other cover plate 3. The cover plate 3 has a triangular structure with its inclined surface at the top. The ends of the two cover plates 3 that are far apart from each other slope downwards. When rain protection is needed for outdoor observation of the drawing, the two positioning frames 1 are rotated via the first hinge 2 to bring them to the same horizontal plane, and then the drawing is placed on the positioning frame. Inside frame 1, the cover plate 3 is rotated via the second hinge 5, so that the cover plate 3 covers the surface of the positioning frame 1. Because the sealing strip 4 protrudes, the cover plate 3 needs to be rotated side by side when it is covered, so that the sealing strip 4 covers the surface of the other cover plate 3. Because the cover plate 3 is made of transparent acrylic material, it has the characteristics of low cost, light weight and good light transmission efficiency, so the drawing can be viewed through the cover plate 3. Because the cover plate 3 is sloping, when rainwater falls on the surface of the cover plate 3, the rainwater will run off along the sloping surface of the cover plate 3 and will not remain on the surface of the cover plate 3. The sealing strip 4 will cover the gap between the two cover plates 3, effectively preventing rainwater from wetting the drawing through the gap between the two cover plates 3.

[0023] In this embodiment, each cover plate 3 has a locking plate 7 rotatably connected to both sides via bearings. The positioning frame 1 is provided with a positioning twist 6 at the position corresponding to the locking plate 7. The positioning twist 6 is slidably connected to the positioning frame 1. The positioning twist 6 consists of a cylindrical structure and an elliptical structure. The locking plate 7 has a positioning groove inside that corresponds to the shape of the positioning twist 6. When the cover plate 3 is placed on the surface of the positioning frame 1, in order to prevent the cover plate 3 from being accidentally opened and causing rainwater to enter the interior of the positioning frame 1, the positioning twist 6 is first pulled outward. When the cover plate 3 is placed on the surface of the positioning frame 1, the locking plate 7 will be in a suitable position. Then the positioning twist 6 is inserted back into its original position, and the elliptical part of the sealing strip 4 will be inserted into the interior of the positioning groove, thereby locking the cover plate 3 through the locking plate 7.

[0024] In this embodiment, each positioning frame 1 has a groove 8 on its inner wall. A positioning rod 9 is installed inside the positioning frame 1. The two ends of the positioning rod 9 are inserted into the two grooves 8 respectively and are slidably connected to the positioning frame 1 through the grooves 8. A scraper 11 is fixedly connected to the bottom surface of the positioning rod 9. The scraper 11 is inclined. A pressure block 10 is fixedly connected to the top surface of the positioning rod 9. When the drawing is placed inside the positioning frame 1, in order to prevent the drawing from wrinkling or bending, the two positioning rods 9 are inserted into the grooves 8 so that the two scrapers 11 press down on both sides of the drawing. Then, the two positioning rods 9 are pulled away from each other. The scraper 11 will slide on the surface of the drawing, thereby smoothing the drawing. After the positioning rod 9 slides to both ends of the drawing, the cover plate 3 is closed. The cover plate 3 will squeeze the positioning rod 9 through the pressure block 10. The positioning rod 9 will slide downward inside the groove 8. Because the scraper 11 is made of high fiber synthetic plastic, it has high elasticity. The positioning rod 9 is subjected to force, causing the scraper 11 to deform, thereby pressing and limiting the drawing and preventing the drawing from wrinkling or bending.

[0025] In this embodiment, the bottom surface of each positioning frame 1 is rotatably connected to a support leg 17 via a bearing seat. A limit rod 12 is rotatably connected to the surface of the support leg 17. A positioning shell 13 is fixedly connected to the bottom surface of the positioning frame 1. An insert block 14 is fixedly connected to the end of the limit rod 12 away from the support leg 17. The insert block 14 is inserted into the interior of the positioning shell 13. A pin 15 is slidably connected to the surface of the positioning shell 13. The pin 15 passes through the insert block 14. When the two frames are laid flat, the support leg 17 will rotate inside the positioning frame 1 via the bearing seat until it is at a suitable angle. Then, the limit rod 12 is rotated so that the insert block 14 is inserted into the interior of the positioning shell 13. Then, the pin 15 is inserted into the interior of the positioning shell 13. This achieves support for the positioning frame 1 and allows it to be folded for easy carrying by workers outdoors.

[0026] In this embodiment, two positioning rings 16 are symmetrically fixedly connected to both sides of each positioning frame 1. When viewing drawings outdoors, the umbrella handle can be inserted into the positioning ring 16 to limit the external umbrella, reducing the number of items that the operator needs to hold, allowing them to focus on viewing the drawings.

[0027] The use of this utility model involves the following steps:

[0028] S1: When the drawing is placed inside the positioning frame 1, in order to prevent the drawing from wrinkling or bending, two positioning rods 9 are inserted into the slide groove 8, so that two scrapers 11 press against the two sides of the drawing respectively. Then, the two positioning rods 9 are pulled away from each other, and the scrapers 11 will slide on the surface of the drawing, thereby smoothing the drawing. After the positioning rods 9 slide to both ends of the drawing, the cover plate 3 is closed. The cover plate 3 will squeeze the positioning rods 9 through the pressure block 10. The positioning rods 9 will slide downward inside the slide groove 8. Because the scraper 11 is made of high fiber synthetic plastic, it has high elasticity. The positioning rods 9 are subjected to force, causing the scraper 11 to deform, thereby pressing and limiting the drawing to prevent the drawing from wrinkling or bending.

[0029] S2: When it is necessary to observe the drawings outdoors and protect them from rain, first rotate the two positioning frames 1 through the first hinge 2 so that the two positioning frames 1 are on the same horizontal plane. Then place the drawings inside the positioning frames 1, and then rotate the cover plate 3 through the second hinge 5 so that the cover plate 3 covers the surface of the positioning frames 1. Because the sealing strip 4 protrudes, the cover plate 3 needs to be rotated side by side when it is covered so that the sealing strip 4 covers the surface of the other cover plate 3. Because the cover plate 3 is made of transparent acrylic material, it has the characteristics of low cost, light weight and good light transmission efficiency, so the drawings can be viewed through the cover plate 3. Because the cover plate 3 is sloping, when rainwater falls on the surface of the cover plate 3, the rainwater will run off along the sloping surface of the cover plate 3 and will not remain on the surface of the cover plate 3. The sealing strip 4 will cover the gap between the two cover plates 3, effectively preventing rainwater from wetting the drawings through the gap between the two cover plates 3.

[0030] S3: After the cover plate 3 is placed on the surface of the positioning frame 1, in order to prevent the cover plate 3 from being accidentally opened and causing rainwater to enter the interior of the positioning frame 1, first pull the positioning knob 6 outward. After the cover plate 3 is placed on the surface of the positioning frame 1, the locking plate 7 will be in the appropriate position. Then, insert the positioning knob 6 back into the original position. The elliptical part of the sealing strip 4 will be inserted into the interior of the positioning groove, thereby locking the cover plate 3 through the locking plate 7.

[0031] S4: When the two positions are laid out on a plane, the support leg 17 will rotate inside the positioning frame 1 through the bearing seat until it is at a suitable angle. Then, the limiting rod 12 will be rotated so that the insert block 14 is inserted into the positioning shell 13. Then, the pin 15 will be inserted into the positioning shell 13, thus supporting the positioning frame 1 and allowing it to be folded for easy carrying by workers outdoors.

[0032] S5: When viewing drawings outdoors, the umbrella handle can be inserted into the positioning ring 16 to limit the external umbrella, reducing the number of items that workers need to hold, allowing them to focus entirely on viewing the drawings.

[0033] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0034] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rainproof drawing workbench for outdoor topographic surveying, comprising two symmetrically arranged positioning frames (1), characterized in that: The two positioning frames (1) are rotatably connected by a first hinge (2), and each positioning frame (1) is rotatably connected to a cover plate (3) by a second hinge (5). A sealing strip (4) is fixedly connected to one end of the cover plate (3) facing the other cover plate (3), and the sealing strip (4) covers the surface of the other cover plate (3).

2. The rainproof drawing workbench for outdoor topographic surveying according to claim 1, characterized in that: The cover plate (3) has a triangular structure with the inclined surface at the top, and the ends of the inclined surfaces of the two cover plates (3) that are far apart from each other are inclined downwards.

3. The rainproof drawing workbench for outdoor topographic surveying according to claim 2, characterized in that: Each of the cover plates (3) has a clamping plate (7) rotatably connected to both sides by bearings. The positioning frame (1) is provided with a positioning knob (6) at the position corresponding to the clamping plate (7). The positioning knob (6) is slidably connected to the positioning frame (1). The positioning knob (6) is composed of a cylindrical structure and an elliptical structure. The clamping plate (7) has a positioning groove inside that corresponds to the shape of the positioning knob (6).

4. The rainproof drawing workbench for outdoor topographic surveying according to claim 1, characterized in that: Each of the positioning frames (1) has a groove (8) on its inner wall. A positioning rod (9) is provided inside the positioning frame (1). The two ends of the positioning rod (9) are inserted into the two grooves (8) respectively, and are slidably connected to the positioning frame (1) through the grooves (8). A scraper (11) is fixedly connected to the bottom surface of the positioning rod (9). The scraper (11) is inclined. A pressure block (10) is fixedly connected to the top surface of the positioning rod (9).

5. The rainproof drawing workbench for outdoor topographic surveying according to claim 1, characterized in that: Each of the positioning frames (1) has a support leg (17) rotatably connected to its bottom surface via a bearing seat. A limit rod (12) is rotatably connected to the surface of the support leg (17). A positioning shell (13) is fixedly connected to the bottom surface of the positioning frame (1). A plug (14) is fixedly connected to the end of the limit rod (12) away from the support leg (17). The plug (14) is inserted into the interior of the positioning shell (13). A pin (15) is slidably connected to the surface of the positioning shell (13). The pin (15) passes through the plug (14).

6. The rainproof drawing workbench for outdoor topographic surveying according to claim 1, characterized in that: Two positioning rings (16) are symmetrically fixedly connected to both sides of each positioning frame (1).

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