Real estate map drawing device
By combining a tripod and a dial, and using a laser rangefinder and dial calculations, the problem of measurement accuracy depending on verticality in the real estate map drawing device was solved, thus achieving high-precision real estate map drawing.
Patent Information
- Application Number
- CN202520051965.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-01-09
AI Technical Summary
When measuring the width of a wall, the accuracy of existing real estate map drawing devices depends on the perpendicularity of the laser rangefinder, which makes the measurement results prone to cosine errors.
The dial is adjusted to a horizontal position using a tripod, and the distance between the two corner edges of the target wall is measured using a laser rangefinder. The rotation angle of the mounting plate is calculated using the dial, and the wall width is accurately calculated by combining the known lengths of the two sides of the triangle and the included angle.
It enables high-precision measurement for real estate map drawing, reduces measurement errors, and improves the accuracy and convenience of surveying and mapping.
Smart Images

Figure CN223622570U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of real estate map drawing technology, and more specifically, to a real estate map drawing apparatus. Background Technology
[0002] Drawing property maps inside a house can clearly define information such as ownership, area, and location, providing a detailed understanding of the actual condition of the property and offering accurate data support for property management. It also allows for reasonable planning of subsequent house renovation and construction. An existing technology, CN219954722U, discloses a property map drawing device. This device uses a lifting component and a Z-shaped handle to move the measuring component upwards, achieving the purpose of measuring different heights and lengths of the entire house. This makes the measurement process of ceilings and load-bearing columns extremely convenient, improving surveying efficiency. The measured values are transmitted to a touchscreen, facilitating the drawing of property maps by staff. However, the inventor believes that the above-mentioned related technologies still have the following drawbacks: When measuring the width of a wall in the comparative literature, the drawing device relies on the straight-line distance between a laser rangefinder and the target wall. The measurement accuracy largely depends on whether the laser rangefinder's ray is perpendicular to the target wall. Because perpendicularity cannot be guaranteed, the measurement results are prone to cosine errors. Therefore, we propose this property map drawing device. Utility Model Content
[0003] 1. Technical problems to be solved
[0004] The purpose of this application is to provide a real estate map drawing device, which solves the technical problem in the prior art where the drawing devices in the aforementioned literature, when measuring the width of a wall, rely on the straight-line distance between a laser rangefinder and the target wall. The measurement accuracy largely depends on whether the laser rangefinder's ray is perpendicular to the target wall, and because perpendicularity cannot be guaranteed, the measurement results are prone to cosine errors. This application achieves a device where the scale can be adjusted to a horizontal position via a tripod, and the height of the scale can be freely adjusted. The laser rangefinder is mounted on a mounting bracket connected to a damping shaft. The horizontally positioned laser rangefinder measures the distance between the two corner edges of the target wall, and the rotation angle of the bracket is calculated using the scale. Using the known lengths of the two sides and the included angle of the triangle, the remaining width of the target wall can be accurately calculated. The measurement results are then drawn and recorded on a drawing board using watercolor pens according to the interior structure of the house. This drawing device offers the advantages of accurate measurement, ease of use, and convenient real estate map drawing.
[0005] 2. Technical Solution
[0006] This application provides a real estate map drawing device, comprising: a tripod support, the tripod support including a T-shaped rod, a hinge plate slidably mounted on the T-shaped rod, a spirit level fixed on the upper surface of the hinge plate, three legs rotatably hinged to the hinge plate, each leg having a conical head threaded to its bottom end, a pull rod rotatably hinged between the bottom end of the T-shaped rod and each leg, a first screw threadedly mounted on the hinge plate, the first screw rotating along the hinge plate and tightly pressing against the outer surface of the T-shaped rod, and a sliding rod slidably mounted on the upper end of the T-shaped rod. A scale is fixedly provided at one end, and a damped rotating bracket is installed at the center of the scale. An indicator plate is fixedly provided on the bracket, and a laser rangefinder is detachably installed inside the bracket. A mounting base is connected to the T-shaped rod, and the mounting base includes a crossbar, which is fixedly connected to the T-shaped rod. An L-shaped base is rotatably connected to the crossbar, and a concave slide is slidably installed on the L-shaped base. A drawing board is clamped between the concave slide and the L-shaped base. A pen box is fixedly provided on the side of the concave slide, and watercolor pens are detachably snapped into the pen box.
[0007] By adopting the above technical solution, a triangular support is formed by a T-shaped rod, a hinge plate, support legs, and a tie rod. In use, the hinge plate slides along the T-shaped rod, causing the support legs to rotate and open. Tightening the first screw limits the hinge plate's position relative to the T-shaped rod, allowing the three support legs to be stably placed on the ground. Due to variations in floor flatness, the cones at the bottom of the support legs are adjusted, and the leveling bubble on the hinge plate is used to determine if it is horizontal. A sliding rod is slidably connected to the upper end of the T-shaped rod, and this sliding rod is fixedly connected to a graduated dial. The graduated dial can be parallel to the hinge plate. The measurement method is as follows: when the graduated dial moves along the T-shaped rod via the sliding rod... After sliding to a certain height and being limited, and with the dial adjusted to a horizontal state, the distance between the laser rangefinder and the two corner edges of the target wall forms a triangular structure with the width of the target wall. The laser rangefinder measures the distance to the corner of the target wall, and the included angle between the two sides can be measured by the dial to determine the angle of rotation of the mounting bracket. Based on the known lengths of the two sides of the triangle and the included angle, the remaining width of the target wall can be calculated. Then, the drawing and measurement results are recorded on a drawing board according to the internal structure of the house using a watercolor pen. This drawing device is accurate, convenient to use, and easy to use for drawing property maps.
[0008] Optionally, a second screw is threaded onto the upper end of the T-shaped rod. The second screw rotates along the T-shaped rod and tightly presses against the outer surface of the slide rod.
[0009] By adopting the above technical solution, after the slide bar slides up and down along the T-shaped bar, it can be limited by locking the second screw.
[0010] Optionally, a damping shaft is fixedly provided at the bottom of the card holder, and the bottom end of the damping shaft is damped and rotatably mounted at the center of the dial.
[0011] By adopting the above technical solution, the laser rangefinder is installed in the mounting bracket. The mounting bracket can be rotated in a damped manner along the scale via a damping shaft, so that the laser rangefinder's ray rotates from one edge of the target wall to the other edge. The included angle of the mounting bracket's rotation can be read from the scale.
[0012] Optionally, a third screw is threaded onto the bottom of the L-shaped seat, and the third screw rotates along the L-shaped seat and tightly presses against the outer surface of the crossbar.
[0013] By adopting the above technical solution, the L-shaped seat can rotate along the crossbar and be limited by locking the third screw, so that the drawing board installed between the concave slide and the L-shaped seat is at an appropriate angle, which facilitates the drawing of real estate maps.
[0014] Optionally, the L-shaped seat is provided with a heat dissipation groove and two sliding grooves. The concave slide is slidably installed along the sliding grooves, and a spring is fixedly connected between the concave slide and the inner wall of the sliding groove.
[0015] By adopting the above technical solution, the concave slide can slide along the slide groove, and two springs are used to clamp the concave slide and the L-shaped seat to install the drawing board.
[0016] 3. Beneficial effects
[0017] One or more technical solutions provided in this application have at least the following technical effects or advantages: the dial can be adjusted to a horizontal state via a triangular bracket, and the height of the dial can be freely adjusted. The dial is mounted on a laser rangefinder via a damping shaft-connected mounting bracket. The horizontally positioned laser rangefinder measures the distance between the two corner edges of the target wall, and the dial is used to calculate the rotation angle of the mounting bracket. Using the known lengths of the two sides and the included angle of the triangle, the remaining width of the target wall can be accurately calculated. The measurement results are then drawn and recorded on a drawing board according to the internal structure of the house using a watercolor pen. This drawing device is accurate, convenient to use, and easy to use for drawing property maps. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the real estate map drawing device disclosed in a preferred embodiment of this application;
[0019] Figure 2 This is a schematic diagram of the triangular bracket, dial, card holder, and mounting base of the real estate map drawing device disclosed in a preferred embodiment of this application.
[0020] Figure 3 The property map drawing apparatus disclosed in a preferred embodiment of this application Figure 2 Enlarged structural diagram at point A in the middle;
[0021] Figure 4The property map drawing apparatus disclosed in a preferred embodiment of this application Figure 2 Enlarged structural diagram at point B;
[0022] The following are the labels in the diagram: 1. Triangular bracket; 11. T-shaped rod; 12. Hinge; 121. Spirit level; 13. Support leg; 131. Cone head; 14. Tie rod; 15. First screw; 16. Second screw; 17. Slide rod; 2. Dial; 3. Card holder; 31. Damping shaft; 32. Indicator plate; 4. Laser rangefinder; 5. Mounting base; 51. Crossbar; 52. L-shaped base; 521. Heat dissipation groove; 522. Slide groove; 53. Third screw; 54. Spring; 55. Concave slide; 56. Pen case; 57. Watercolor pen; 6. Drawing board. Detailed Implementation
[0023] The present application will be further described in detail below with reference to the accompanying drawings.
[0024] Reference Figures 1 to 4This application provides a real estate map drawing device, comprising: a triangular support 1, the triangular support 1 including a T-shaped rod 11, a hinge 12 slidably sleeved on the T-shaped rod 11, a spirit level 121 fixedly mounted on the upper surface of the hinge 12, three legs 13 rotatably hinged to the hinge 12, each leg 13 having a conical head 131 threadedly connected to its bottom end, a pull rod 14 rotatably hinged between the bottom end of the T-shaped rod 11 and each leg 13, a first screw 15 threadedly mounted on the hinge 12, the first screw 15 rotating along the hinge 12 and tightly pressing against the outer surface of the T-shaped rod 11, and a sliding rod 17 slidably mounted on the upper end of the T-shaped rod 11, the upper end of the sliding rod 17 being fixed. A scale dial 2 is provided, and a damped rotating mounting base 3 is installed at the center of the scale dial 2. An indicator plate 32 is fixedly mounted on the mounting base 3. A laser rangefinder 4 is detachably mounted inside the mounting base 3. A mounting seat 5 is connected to a T-shaped rod 11. The mounting seat 5 includes a crossbar 51, which is fixedly connected to the T-shaped rod 11. An L-shaped seat 52 is rotatably connected to the crossbar 51. A concave slide 55 is slidably mounted on the L-shaped seat 52. A drawing board 6 is clamped between the concave slide 55 and the L-shaped seat 52. A pen box 56 is fixedly mounted on the side of the concave slide 55. A watercolor pen 57 is detachably snapped into the pen box 56. The system is connected via the T-shaped rod 11, hinge 12, and support. The legs 13 and the tie rod 14 form a triangular support 1. In use, the hinge 12 slides along the T-shaped rod 11, causing the legs 13 to rotate and open. Tightening the first screw 15 limits the position of the hinge 12 against the T-shaped rod 11, allowing the three legs 13 to be stably placed on the ground. Due to the unevenness of the floor, the cone 131 at the bottom of the legs 13 is adjusted, and the level bubble 121 on the hinge 12 is used to determine if the hinge 12 is horizontal. The upper end of the T-shaped rod 11 is slidably connected to a sliding rod 17, which is fixedly connected to a dial 2. The dial 2 can be parallel to the hinge 12. The measurement method is as follows: when the dial 2 passes through the sliding rod... After sliding along the T-shaped rod 11 to a certain height and being limited, and after the scale 2 is adjusted to a horizontal state, the distance between the laser rangefinder 4 and the two corner edges of the target wall forms a triangular structure with the width of the target wall. The laser rangefinder 4 measures the distance to the corner of the target wall, and the included angle between the two sides can be measured by the scale 2 to determine the rotation angle of the card holder 3. Based on the known lengths of the two sides of the triangle and the included angle, the remaining width of the target wall can be calculated. Then, the watercolor pen 57 is used to draw and record the measurement results on the drawing board 6 according to the internal structure of the house. This drawing device is accurate, convenient to use and draw property maps.
[0025] Reference Figure 1 and Figure 2 The upper end of the T-shaped rod 11 is threaded with a second screw 16. The second screw 16 rotates along the T-shaped rod 11 and tightly presses against the outer surface of the slide rod 17. After the slide rod 17 slides up and down along the T-shaped rod 11, it can be limited by locking the second screw 16.
[0026] Reference Figure 2 and Figure 3 A damping shaft 31 is fixedly provided at the bottom of the card holder 3. The bottom end of the damping shaft 31 is damped and rotated at the center of the scale 2. The laser rangefinder 4 is installed in the card holder 3. The card holder 3 can rotate damped along the scale 2 via the damping shaft 31, so that the ray of the laser rangefinder 4 rotates from one edge of the target wall to the other edge. The included angle of rotation of the card holder 3 can be read through the scale 2.
[0027] Reference Figure 2 and Figure 4 The bottom of the L-shaped seat 52 is threaded with a third screw 53. The third screw 53 rotates along the L-shaped seat 52 and tightly presses against the outer surface of the crossbar 51. The L-shaped seat 52 can rotate along the crossbar 51 and is limited by locking the third screw 53, so that the drawing board 6 installed between the concave slide 55 and the L-shaped seat 52 is at an appropriate angle, which is convenient for personnel to draw property maps.
[0028] Reference Figure 2 and Figure 4 The L-shaped base 52 has a heat dissipation groove 521 and two sliding grooves 522. The concave slide 55 is slidably installed along the sliding groove 522, and springs 54 are fixedly connected between the concave slide 55 and the inner wall of the sliding groove 522. The concave slide 55 can slide along the sliding groove 522, and the two springs 54 are used to clamp the drawing board 6 between the concave slide 55 and the L-shaped base 52.
[0029] Working principle: In use, the hinge 12 slides along the T-shaped rod 11, causing the support legs 13 to rotate and open. Tightening the first screw 15 limits the hinge 12 to the T-shaped rod 11, allowing the three support legs 13 to be stably placed on the ground. Adjusting the cones 131 at the bottom of the support legs 13 stabilizes the triangular bracket 1 on the ground. The level of the hinge 12 is determined by the bubble level 121 on the hinge 12. The slide rod 17 slides along the upper end of the T-shaped rod 11, and tightening the second screw 16 limits its position, ensuring the slide rod 17 is fixedly connected to the scale 2 and can be horizontally set and adjusted to the required height. During measurement, when the horizontal... After the dial 2 of the target wall is slid along the T-shaped rod 11 to the required height via the slide bar 17, the distance between the laser rangefinder 4 and the two corner edges of the target wall forms a triangular structure with the width of the target wall. The laser rangefinder 4 measures the distance between the two corner edges of the target wall, and the dial 2 reads the rotation angle of the card holder 3, that is, the included angle between the two sides being measured. Based on the known lengths of the two sides of the triangle and the included angle, the remaining width of the target wall can be calculated. Then, the watercolor pen 57 is used to draw on the drawing board 6 according to the internal structure of the house and record the measurement results. This drawing device is accurate, convenient to use and draw property maps.
Claims
1. A real estate map drawing device, characterized in that: Includes: a triangular support (1), the triangular support (1) including a T-shaped rod (11), a hinge (12) slidably sleeved on the T-shaped rod (11), a spirit level (121) fixed on the upper surface of the hinge (12), three legs (13) rotatably hinged on the hinge (12), each leg (13) having a conical head (131) threaded to its bottom end, a pull rod (14) rotatably hinged between the bottom end of the T-shaped rod (11) and each leg (13), a first screw (15) threadedly installed on the hinge (12), the first screw (15) rotating along the hinge (12) and tightly pressing against the outer surface of the T-shaped rod (11), a slide rod (17) slidably installed on the upper end of the T-shaped rod (11), and a scale plate fixed on the upper end of the slide rod (17). (2) A damped rotating mounting bracket (3) is installed at the center of the dial (2). An indicator plate (32) is fixedly mounted on the mounting bracket (3). A laser rangefinder (4) is detachably mounted inside the mounting bracket (3). A mounting base (5) is connected to the T-shaped rod (11). The mounting base (5) includes a crossbar (51). The crossbar (51) is fixedly connected to the T-shaped rod (11). An L-shaped seat (52) is rotatably connected to the crossbar (51). A concave slide (55) is slidably mounted on the L-shaped seat (52). A drawing board (6) is sandwiched between the concave slide (55) and the L-shaped seat (52). A pen box (56) is fixedly mounted on the side of the concave slide (55). A watercolor pen (57) is detachably snapped into the pen box (56).
2. The real estate map drawing device according to claim 1, characterized in that: The upper end of the T-shaped rod (11) is threaded with a second screw (16), which rotates along the T-shaped rod (11) and tightly presses against the outer surface of the slide rod (17).
3. The real estate map drawing device according to claim 1, characterized in that: The card holder (3) is fixedly provided with a damping shaft (31) at the bottom end, and the damping shaft (31) is installed at the center of the dial (2) in a damped rotatable manner.
4. The real estate map drawing device according to claim 1, characterized in that: The bottom of the L-shaped seat (52) is threaded with a third screw (53), which rotates along the L-shaped seat (52) and tightly presses against the outer surface of the crossbar (51).
5. The real estate map drawing device according to claim 1, characterized in that: The L-shaped seat (52) is provided with a heat dissipation groove (521) and two sliding grooves (522). The concave slide (55) is slidably installed along the sliding groove (522), and a spring (54) is fixedly connected between the concave slide (55) and the inner wall of the sliding groove (522).
Citation Information
Patent Citations
Real estate map drawing device for real estate surveying and mapping
CN219954722U