Building area measuring device for engineering

Abstract

The application discloses a building area measuring device for engineering, and relates to the technical field of building area measurement. The building area measuring device for engineering comprises supporting legs, supporting bottom plates are fixedly connected to the top of the supporting legs, adjusting mechanisms for adjusting the horizontal plane of the measuring device are arranged on the upper surface of the supporting bottom plates, and protection mechanisms for protecting the measuring device are arranged on the top of the supporting bottom plates. The adjusting mechanisms are used in cooperation with the supporting bottom plates. Since the ground of a construction site is uneven, the slope of the measuring device needs to be adjusted. The height of the circular sleeve plate is adjusted to adjust the slope of the detection device. The problem that the detection device is prone to tilting during use at the construction site is solved. The device is kept horizontal, errors caused by tilting or instability are avoided, the measuring precision is improved, and especially in the measurement of large buildings, the precision requirement is high. The device is kept horizontal, and the requirement can be met.

Description

Technical Field

[0001] This invention relates to the field of building area measurement technology, specifically to a building area measurement device for engineering applications. Background Technology

[0002] An engineering building area measuring device is a device that can quickly and accurately measure the area of ​​a building. It typically consists of a laser, a sensor, a computer, and a display. Its working principle is to measure the building using a laser rangefinder, then transmit the data to the computer for calculation, and finally display the building's area on the monitor. Using an engineering building area measuring device can greatly improve the accuracy and efficiency of measurement, avoiding the problem of large errors in traditional manual measurement methods. In addition, the device can automatically save the measurement data and support data analysis and processing on the computer, providing a more scientific method for the measurement and management of building area.

[0003] The current equipment still has many inconveniences in its use;

[0004] The specific defects are as follows:

[0005] Firstly, since the area of ​​a building is determined by measuring its horizontal projection, the building area measuring device needs to be kept horizontal to ensure the accuracy of the measurement results. The ground on a construction site is usually not flat, but has some undulating terrain. If the building area measuring device is not properly installed or supported, it is easy to tilt on uneven terrain. The tilt of the device will cause the measurement result to deviate from the actual area position. The amount of deviation depends on the tilt angle and the measurement distance. This will lead to misjudgment of the building area position. In addition, the tilted device cannot completely traverse the boundary of the building, resulting in incomplete measurement results. This leads to the omission of some areas or inaccurate measurement results.

[0006] Secondly, the construction site environment is complex. Collisions between various mobile devices, construction tools, and materials on the construction site can damage the measuring device. For example, bumps during material transportation and impacts from objects can damage the measuring device, leading to deviations in the measurement results and affecting the accuracy and reliability of the data. In addition, there are a large amount of dust and particulate matter in the air at the construction site. These can accumulate on various parts of the measuring device. Dust and particulate matter can adhere to the surface of the measuring device's lens, thus blocking the detection light path and causing unstable or unreadable measurement results, which will affect the accuracy of area measurement.

[0007] Therefore, the present invention proposes a building area measuring device for engineering applications to compensate for and improve the deficiencies of the prior art. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] To address the shortcomings of existing technologies, this invention provides a building area measurement device for engineering projects, which solves the problems mentioned in the background art, such as the easy tilting of the detection device during use on construction sites and the susceptibility of the detection device to external influences during use on construction sites.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the present invention is implemented through the following technical solution: a building area measuring device for engineering use, including a support leg, a support base plate fixedly connected to the top of the support leg, an adjustment mechanism for adjusting the horizontal plane of the measuring device provided on the upper surface of the support base plate, and a protection mechanism for protecting the measuring device provided on the top of the support base plate.

[0012] The adjustment mechanism includes a circular sleeve plate for adjusting the slope of the measuring device;

[0013] The protection mechanism includes a manual pull shaft for adjusting the movement of the measuring device.

[0014] Preferably, the adjusting mechanism includes a fixed support column, which is fixedly connected to the upper surface of the supporting base plate. A rotating support column is fixedly connected to the upper surface of the fixed support column. The rotating support column is T-shaped with equal lengths at both ends. A fixed clamping plate is fixedly connected to the upper surface of the supporting base plate. A movable inner plate is slidably connected inside the fixed clamping plate. A circular sleeve plate is rotatably connected to the upper surface of the movable inner plate. The circular sleeve plate is concentric with the fixed support column. A toothed block is fixedly connected to the surface of the fixed clamping plate. A top toothed block is fixedly connected to the surface of the fixed clamping plate. The top toothed block is located above the toothed block on the surface of the fixed clamping plate. A power inner shaft is rotatably connected inside the rotating support column. Both ends of the power inner shaft are respectively fixed... A power pull rod is connected to a support side plate. A power pull shaft is fixedly connected to the surface of the power pull rod. The power pull shaft is L-shaped. A retaining ball is fixedly connected to the end of the power pull shaft away from the rotating support column. The retaining ball is slidably connected to the inside of the second fixed block. A retaining plate is rotatably connected to the surface of the movable inner plate. Tooth blocks are fixedly connected to the surfaces of both the retaining plate and the fixed retaining plate. The tooth blocks on the surface of the retaining plate mesh with the tooth blocks on the surface of the fixed retaining plate. A second fixed block and a first fixed block are fixedly connected to the surface of the movable inner plate. A push spring is fixedly connected between the second fixed block and the retaining plate. A spring lever is fixedly connected to the surface of the first fixed block. A limit retaining shaft is fixedly connected to the surface of the retaining plate.

[0015] Preferably, the spring lever and the limiting pin are located on the same horizontal plane, and the spring lever is located inside the rotation path of the limiting pin.

[0016] Preferably, the side of the toothed block on the fixed clamping plate away from the inner power shaft is set as an inclined surface, and the side of the toothed block on the clamping shaft plate near the inner power shaft is set as an inclined surface.

[0017] Preferably, the protective mechanism includes a protective frame, which is fixedly connected to the upper surface of the supporting side plate. A protective top plate is slidably connected to the upper surface of the protective frame. A sliding placement plate is slidably connected to the inside of the protective frame. An outer pull rod is rotatably connected to the inner wall surface of the protective frame. The end of the outer pull rod away from the rotating support is rotatably connected to the surface of the protective top plate. A rotating half-tooth is rotatably connected to the inner wall of the protective frame. A driving inner shaft is fixedly connected inside the rotating half-tooth. An inner pull rod is rotatably connected to the surface of the driving inner shaft. The end of the inner pull rod away from the rotating half-tooth is rotatably connected to the surface of the protective top plate. A first abutment rod is fixedly connected to the surface of the driving inner shaft. A second abutment rod is rotatably connected to the surface of the sliding placement plate. The end of the first abutment rod away from the rotating half-tooth is rotatably connected to the surface of the second abutment rod. A powered sliding plate is slidably connected to the inner wall of the protective frame. The teeth on the surface of the powered sliding plate mesh with the teeth on the surface of the rotating half-tooth. A manual pull shaft is slidably connected to the surface of the protective frame and fixedly connected to the surface of the powered sliding plate.

[0018] Preferably, there are two rotating half-teeth, which are arranged symmetrically about the power slide plate.

[0019] Preferably, the sum of the lengths of the first abutment and the second abutment is greater than the distance from the upper surface of the sliding placement plate to the upper surface of the protective frame.

[0020] Preferably, the protective top plate is T-shaped, and the sum of the lengths of the two protective top plates is greater than the length of the protective frame.

[0021] (III) Beneficial Effects

[0022] The building area measurement device for engineering applications provided by this invention has the following beneficial effects:

[0023] 1. By using the adjustment mechanism in conjunction with the supporting base plate, when the slope of the measuring device needs to be adjusted due to the uneven ground at the construction site, the slope of the measuring device is adjusted by adjusting the height of the circular sleeve plate. This solves the problem of the measuring device easily tilting during use on the construction site. Keeping the device level can avoid errors caused by tilting or instability, thereby improving the accuracy of the measurement. Especially in the measurement of large buildings, where high accuracy is required, keeping the device level can meet this requirement. Furthermore, keeping the device level can increase its stability and reduce the possibility of being affected by external environmental factors. In complex environments such as construction sites, a stable device can better adapt to various working conditions and improve the stability and reliability of its use.

[0024] 2. By using the protective mechanism in conjunction with the circular sleeve plate, when the testing device needs protection during the testing process, the manual pull shaft is pushed down to set the testing device inside the protective frame, thereby avoiding external influences on the testing device. This solves the problem of the testing device being easily affected by external factors when used on the construction site. Protecting the testing device with the protective frame provides additional physical protection, preventing damage from external objects and extending its service life. Furthermore, the protective frame effectively isolates the testing device from the external environment, preventing dust, moisture, and other substances from entering the device, protecting its normal operation. The protective frame also isolates the testing device to prevent misoperation or accidental contact, ensuring the accuracy and stability of the measurement.

[0025] 3. By using the adjustment mechanism in conjunction with the protection mechanism, the protection mechanism needs to remain stable on different terrains to ensure the reliability of measurement or protection. The slope adjustment mechanism can adjust the slope of the protection mechanism to keep it in balance with the terrain, enhance the stability of the protection mechanism, reduce instability caused by uneven terrain, and make it easy to adjust the slope of the protection mechanism without complicated operations or the use of external tools. This can improve the convenience and efficiency of operation and reduce the workload of operators. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0028] Figure 3 This is a diagram showing the positional relationship between the adjusting mechanism and the protective mechanism of the present invention;

[0029] Figure 4 This is a schematic diagram of the overall structure of the adjustment mechanism of the present invention;

[0030] Figure 5 For the present invention Figure 4 A magnified view of part A in the image;

[0031] Figure 6 This is a schematic diagram of the internal structure of the adjustment mechanism of the present invention;

[0032] Figure 7 This is a schematic diagram of the overall structure of the protection mechanism of the present invention;

[0033] Figure 8 For the present invention Figure 7 A magnified view of part B in the image.

[0034] The labels in the diagram represent:

[0035] 1. Support legs; 2. Support base plate;

[0036] 3. Adjustment mechanism; 311. Fixed support column; 312. Rotating support column; 313. Circular sleeve plate; 314. Fixed clamping plate; 315. Movable inner plate; 316. Power pull rod; 317. Support side plate; 318. Power inner shaft; 319. Shaft clamping plate; 3110. Limiting shaft clamping plate; 3111. Spring lever; 3112. First fixing block; 3113. Second fixing block; 3114. Push spring; 3115. Top toothed block; 3116. Power pull shaft; 3117. Clamping ball;

[0037] 4. Protective mechanism; 411. Protective frame; 412. Protective top plate; 413. Sliding placement plate; 414. Outer pull rod; 415. Inner pull rod; 416. Rotating half tooth; 417. Powered sliding plate; 418. Manual pull shaft; 419. First stop rod; 4110. Drive inner shaft; 4111. Second stop rod. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] refer to Figures 1 to 8 The preferred embodiment of the engineering building area measuring device according to the present invention will be described in detail below. The engineering building area measuring device includes a support leg 1, a support base plate 2 fixedly connected to the top of the support leg 1, an adjustment mechanism 3 for adjusting the horizontal plane of the measuring device is provided on the upper surface of the support base plate 2, and a protection mechanism 4 for protecting the measuring device is provided on the top of the support base plate 2.

[0040] The adjustment mechanism 3 includes a circular sleeve 313 for adjusting the slope of the measuring device;

[0041] The protection mechanism 4 includes a manual pull shaft 418 for adjusting the movement of the measuring device.

[0042] The adjusting mechanism 3 includes a fixed support column 311, which is fixedly connected to the upper surface of the supporting base plate 2. A rotating support column 312 is fixedly connected to the upper surface of the fixed support column 311. The rotating support column 312 is T-shaped with equal lengths at both ends. A fixed locking plate 314 is fixedly connected to the upper surface of the supporting base plate 2. A movable inner plate 315 is slidably connected inside the fixed locking plate 314. A circular sleeve plate 313 is rotatably connected to the upper surface of the movable inner plate 315. The circular sleeve plate 313 is concentric with the fixed support column 311. A toothed block is fixedly connected to the surface of plate 314, and a top toothed block 3115 is fixedly connected to the surface of fixed plate 314. The top toothed block 3115 is located above the toothed block on the surface of fixed plate 314. A power inner shaft 318 is rotatably connected inside the rotating support column 312. A power pull rod 316 and a support side plate 317 are fixedly connected to both ends of the power inner shaft 318, respectively. A power pull shaft 3116 is fixedly connected to the surface of the power pull rod 316. The power pull shaft 3116 is L-shaped and is located away from the rotating support column. One end of 312 is fixedly connected to a retaining ball 3117, which is slidably connected to the inside of the second fixing block 3113. A retaining shaft plate 319 is rotatably connected to the surface of the movable inner plate 315. Both the retaining shaft plate 319 and the fixed retaining plate 314 have fixedly connected toothed blocks. The toothed blocks on the surface of the retaining shaft plate 319 mesh with the toothed blocks on the surface of the fixed retaining plate 314. The surface of the movable inner plate 315 is fixedly connected to the second fixing block 3113 and the first fixing block 3112. The second fixing block 3113 and the retaining shaft plate 319... A push spring 3114 is fixedly connected between the two. A spring pawl 3111 is fixedly connected to the surface of the first fixed block 3112. A limit clamping shaft 3110 is fixedly connected to the surface of the clamping plate 319. The spring pawl 3111 and the limit clamping shaft 3110 are located on the same horizontal plane. The spring pawl 3111 is located inside the rotation path of the limit clamping shaft 3110. The side of the toothed block on the surface of the fixed clamping plate 314 away from the power inner shaft 318 is set as an inclined surface. The side of the toothed block on the surface of the clamping plate 319 close to the power inner shaft 318 is set as an inclined surface.

[0043] The effects achieved by this embodiment are as follows: The building area measuring device needs to be kept horizontal to ensure the accuracy of the measurement results. The ground of the construction site is usually not flat, but has some undulating terrain. If the building area measuring device is not properly installed or supported, it is easy to tilt on uneven terrain. Since the ground of the construction site is uneven, when it is necessary to adjust the slope of the measuring device, the slope of the measuring device is adjusted by adjusting the height of the circular sleeve plate 313. This solves the problem that the measuring device is easy to tilt during use on the construction site. Keeping the device horizontal can avoid errors caused by tilting or instability, thereby improving the accuracy of the measurement.

[0044] The protective mechanism 4 includes a protective frame 411, which is fixedly connected to the upper surface of the supporting side plate 317. A protective top plate 412 is slidably connected to the upper surface of the protective frame 411. A sliding placement plate 413 is slidably connected inside the protective frame 411. An outer pull rod 414 is rotatably connected to the inner wall surface of the protective frame 411. The end of the outer pull rod 414 away from the rotating support column 312 is rotatably connected to the surface of the protective top plate 412. A rotating half-tooth 416 is rotatably connected to the inner wall of the protective frame 411. A driving inner shaft 4110 is fixedly connected inside the rotating half-tooth 416. An inner pull rod 415 is rotatably connected to the surface of the driving inner shaft 4110. The end of the inner pull rod 415 away from the rotating half-tooth 416 is rotatably connected to the surface of the protective top plate 412. A first abutment rod 419 is fixedly connected to the surface of the driving inner shaft 4110. The surface of the mounting plate 413 is rotatably connected to a second abutment rod 4111. The end of the first abutment rod 419 away from the rotating half-tooth 416 is rotatably connected to the surface of the second abutment rod 4111. The inner wall of the protective frame 411 is slidably connected to a power slide plate 417. The toothed blocks on the surface of the power slide plate 417 mesh with the toothed blocks on the surface of the rotating half-tooth 416. The manual pull shaft 418 is slidably connected to the surface of the protective frame 411 and fixedly connected to the surface of the power slide plate 417. There are two rotating half-tooths 416, which are symmetrically arranged about the power slide plate 417. The sum of the lengths of the first abutment rod 419 and the second abutment rod 4111 is greater than the distance from the upper surface of the sliding mounting plate 413 to the upper surface of the protective frame 411. The protective top plate 412 is T-shaped, and the sum of the lengths of the two protective top plates 412 is greater than the length of the protective frame 411.

[0045] The effects achieved by this embodiment are as follows: The construction site environment is complex, with various physical factors colliding and causing damage to the measuring device, such as bumps during material transportation and impacts from objects. Damage to the measuring device can lead to deviations in measurement results, affecting the accuracy and reliability of the data. When the testing process requires protection of the measuring device, the manual pull shaft 418 is pushed down manually to place the measuring device inside the protective frame 411, thereby avoiding external influences on the measuring device. This solves the problem that the measuring device is easily affected by external factors when used on the construction site. The protective frame 411 provides additional physical protection for the measuring device, preventing damage from external objects and extending its service life.

[0046] The following is the complete working process and working principle of the above embodiments:

[0047] Initially: the power pull shaft 3116 is in a horizontal state, the spring pawl 3111 is located on the side of the limit lock shaft 3110 away from the fixed lock plate 314, the push spring 3114 is in a compressed state, the lock shaft plate 319 is located inside the adjacent tooth block on the surface of the fixed lock plate 314, the protective top plate 412 is located on both sides of the protective frame 411, the upper surface of the sliding placement plate 413 is at the same level as the upper surface of the protective frame 411, and the measuring device is located on the upper surface of the placement plate 413.

[0048] During operation: Due to uneven ground at the construction site, when the slope of the measuring device needs to be adjusted, the movable inner plate 315 is manually pushed upwards. Because the toothed blocks on the surface of the retaining plate 319 mesh with the toothed blocks on the surface of the fixed retaining plate 314, and the side of the toothed blocks on the fixed retaining plate 314 away from the power inner shaft 318 is set as an inclined surface, while the side of the toothed blocks on the surface of the retaining plate 319 near the power inner shaft 318 is also set as an inclined surface, the inclined surfaces of the toothed blocks on the fixed retaining plate 314 and the inclined surfaces of the toothed blocks on the surface of the retaining plate 319 are in contact. As the movable inner plate 315 slides upwards, the retaining plate 319 rotates away from the fixed retaining plate 314 under the push of the inclined surface of the fixed retaining plate 314. The push spring 3114 is compressed under the push of the retaining plate 319. When the fixed retaining plate 314 slides upwards under the push of the movable inner plate 315, the retaining ball 3117 is slidably connected inside the circular sleeve plate 313. The circular sleeve plate 313 is in contact with the fixed retaining plate... Pushed by 314, the ball slides upward, thus giving the ball 3117 an upward force, which drives the power rod 316 to rotate via the power shaft 3116. Since the power rod 316 and the support side plate 317 are fixedly connected to both ends of the power inner shaft 318, the power rod 316 drives the power inner shaft 318 to rotate. Since the support side plate 317 is fixedly connected to the end of the power inner shaft 318 away from the power shaft 3116, the rotation of the power inner shaft 318 drives the support side plate 317 to rotate, thereby adjusting the slope of the measuring device fixedly connected to the upper surface of the support side plate 317, and adjusting the direction of the measuring device by rotating the circular sleeve plate 313. When the slope of the measuring device is adjusted, the toothed blocks on the surface of the ball 319 extend back into the interior of the toothed blocks on the surface of the fixed ball 314 under the push of the push spring 3114, and limit the position of the movable inner plate 315 under the push of the push spring 3114.

[0049] Meanwhile, when adjusting the slope of the measuring device requires lowering the height of the movable inner plate 315, the movable inner plate 315 slides upwards under manual pushing until the retaining plate 319 contacts the top toothed block 3115 located on top of the fixed retaining plate 314. When the retaining plate 319 contacts the top toothed block 3115, the retaining plate 319 rotates under the pushing of the top toothed block 3115. Since the spring pawl 3111 is located inside the rotation path of the limiting retaining plate 3110, the retaining plate 319 in the rotating state is fixed by the spring pawl 3111. At this time, the toothed block on the surface of the retaining plate 319 disengages from the toothed block on the surface of the fixed retaining plate 314, thereby fixing the retaining plate 319 in the fixed state. The movable inner plate 315 becomes movable, thereby lowering its height. By adjusting the height of the circular sleeve plate 313, the slope of the detection device is adjusted, solving the problem of the detection device easily tilting during use on the construction site. Keeping the device level can avoid errors caused by tilting or instability, thereby improving the accuracy of measurement. Especially in the measurement of large buildings, where high accuracy is required, keeping the device level can meet this requirement. Furthermore, keeping the device level can increase its stability and reduce the possibility of being affected by external environmental factors. In complex environments such as construction sites, a stable device can better adapt to various working conditions, improving the stability and reliability of use.

[0050] Furthermore, through the cooperation of the protection mechanism 4 and the circular sleeve plate 313, when the detection device needs to be protected during the detection process, the manual pull shaft 418 is pushed down manually. Since the manual pull shaft 418 is fixedly connected to the surface of the power slide plate 417, the manual pull shaft 418 drives the power slide plate 417 to slide downward. The toothed blocks on the surface of the rotating half tooth 416 mesh with the toothed blocks on the surface of the power slide plate 417, thereby driving the rotating half tooth 416 to rotate in the direction of the power slide plate 417. The first stop rod 419 drives the inner shaft 4110 to follow... As the rotating half-tooth 416 rotates synchronously, the inner shaft 4110 is rotated and connected to the surface of the sliding placement plate 413. The end of the first abutment 419 away from the sliding placement plate 413 is rotated and connected to the end of the first abutment 419 away from the manual pull shaft 418. The rotating half-tooth 416 rotates, thereby driving the first abutment 419 to rotate with the rotating half-tooth 416, and driving the inner shaft 4110 to rotate outward, thereby pulling the sliding placement plate 413 to slide downward, so that the detection device that was originally exposed to the outside world enters the interior of the protective frame 411.

[0051] Meanwhile, as the inner pull rod 415 drives the inner shaft 4110 to rotate synchronously with the rotating half-tooth 416, the end of the inner pull rod 415 away from the manual pull shaft 418 is rotatably connected to the surface of the protective top plate 412. The rotating half-tooth 416 rotates and drives the two protective top plates 412 to slide towards the protective frame 411 through the inner pull rod 415, thereby sealing the top of the protective frame 411 and thus sealing the detection device inside the protective frame 411 for protection. By pushing the manual pull shaft 418, the detection device is placed inside the protective frame 411, thereby avoiding external influences on the detection device and solving the problem that the detection device is easily affected by external factors when used on the construction site. Protecting the detection device through the protective frame 411 can provide additional physical protection for the detection device, prevent the device from being damaged by external objects, extend its service life, and effectively isolate the detection device from the external environment, preventing dust, moisture and other substances from entering the device and protecting its normal operation. In addition, the protective frame 411 can isolate the detection device to prevent misoperation or accidental contact, ensuring the accuracy and stability of the measurement.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A building area measuring device for engineering applications, comprising a support leg (1), wherein a supporting base plate (2) is fixedly connected to the top of the support leg (1), characterized in that: The upper surface of the support base plate (2) is provided with an adjustment mechanism (3) for adjusting the horizontal plane of the measuring device, and the top of the support base plate (2) is provided with a protection mechanism (4) for protecting the measuring device. The adjustment mechanism (3) includes a circular sleeve (313) for adjusting the slope of the measuring device. The protection mechanism (4) includes a manual pull shaft (418) for adjusting the activity state of the measuring device. The adjusting mechanism (3) includes a fixed support column (311), which is fixedly connected to the upper surface of the supporting base plate (2). A rotating support column (312) is fixedly connected to the upper surface of the fixed support column (311). The rotating support column (312) is a T-shape with equal lengths at both ends. A fixed clamping plate (314) is fixedly connected to the upper surface of the supporting base plate (2). A movable inner plate (315) is slidably connected inside the fixed clamping plate (314). The circular sleeve plate (313) is rotatably connected to the movable inner plate. On the upper surface of (315), the circular sleeve plate (313) is concentric with the fixed support column (311). A toothed block is fixedly connected to the surface of the fixed clamping plate (314). A top toothed block (3115) is fixedly connected to the surface of the fixed clamping plate (314). The top toothed block (3115) is located above the toothed block on the surface of the fixed clamping plate (314). A power inner shaft (318) is rotatably connected inside the rotating support column (312). Power tie rods (316) and support side plates (315) are fixedly connected to both ends of the power inner shaft (318). 317), the surface of the power pull rod (316) is fixedly connected to a power pull shaft (3116), the power pull shaft (3116) is L-shaped, and the end of the power pull shaft (3116) away from the rotating support column (312) is fixedly connected to a retaining ball (3117), the retaining ball (3117) is slidably connected to the inside of the second fixed block (3113), the surface of the movable inner plate (315) is rotatably connected to a retaining plate (319), and the surfaces of the retaining plate (319) and the fixed retaining plate (314) are both fixedly connected with teeth. The toothed blocks on the surface of the retaining plate (319) mesh with the toothed blocks on the surface of the fixed retaining plate (314). The surface of the movable inner plate (315) is fixedly connected with a second fixed block (3113) and a first fixed block (3112). A push spring (3114) is fixedly connected between the second fixed block (3113) and the retaining plate (319). A spring paddle (3111) is fixedly connected to the surface of the first fixed block (3112). A limit retaining pin (3110) is fixedly connected to the surface of the retaining plate (319). The protective mechanism (4) includes a protective frame (411), which is fixedly connected to the upper surface of the supporting side plate (317). A protective top plate (412) is slidably connected to the upper surface of the protective frame (411). A sliding placement plate (413) is slidably connected inside the protective frame (411). An outer pull rod (414) is rotatably connected to the inner wall surface of the protective frame (411). One end of the outer pull rod (414) away from the rotating support column (312) is rotatably connected to the surface of the protective top plate (412). A rotating half tooth (416) is rotatably connected to the inner wall of the protective frame (411). A driving inner shaft (4110) is fixedly connected inside the rotating half tooth (416). An inner pull rod (415) is rotatably connected to the surface of the driving inner shaft (4110). The inner pull rod (415) is rotatably connected to the surface of the protective top plate (412) at the end away from the rotating half tooth (416). The surface of the driving inner shaft (4110) is fixedly connected to the first abutment rod (419). The surface of the sliding placement plate (413) is rotatably connected to the second abutment rod (4111). The end of the first abutment rod (419) away from the rotating half tooth (416) is rotatably connected to the surface of the second abutment rod (4111). The inner wall of the protective frame (411) is slidably connected to the power slide plate (417). The toothed blocks on the surface of the power slide plate (417) mesh with the toothed blocks on the surface of the rotating half tooth (416). The manual pull shaft (418) is slidably connected to the surface of the protective frame (411). The manual pull shaft (418) is fixedly connected to the surface of the power slide plate (417).

2. The building area measuring device according to claim 1, characterized in that: The spring paddle (3111) and the limiting pin (3110) are located on the same horizontal plane, and the spring paddle (3111) is located inside the rotation path of the limiting pin (3110).

3. The building area measuring device according to claim 1, characterized in that: The surface of the fixed clamping plate (314) is set as an inclined surface on the side away from the power inner shaft (318), and the surface of the clamping plate (319) is set as an inclined surface on the side close to the power inner shaft (318).

4. The building area measuring device according to claim 1, characterized in that: Two rotating half-tooths (416) are provided, and the two rotating half-tooths (416) are arranged symmetrically about the power slide plate (417).

5. The building area measuring device according to claim 1, characterized in that: The sum of the lengths of the first abutment (419) and the second abutment (4111) is greater than the distance from the upper surface of the sliding placement plate (413) to the upper surface of the protective frame (411).

6. The building area measuring device according to claim 1, characterized in that: The protective top plate (412) is T-shaped, and the sum of the lengths of the two protective top plates (412) is greater than the length of the protective frame (411).

Images