Tree perimeter measuring instrument

Abstract

The invention provides a tree perimeter measuring instrument, and relates to the technical field of tree measurement. A ventilation winding part is rotationally connected to the mounting supporting part; the ventilation winding part is fixedly connected with a measurement connecting piece; the measuring connecting piece is fixedly connected with a row of positioning connecting pieces; a limiting friction piece is connected to the mounting supporting part in a sliding manner; two nail pressing devices are fixedly connected to the mounting supporting part; an air pressure supply part is fixedly connected to the mounting support part; the air pressure supply part is rotationally connected to the ventilation winding part; the air pressure supply part is rotationally connected with a rolling and expanding integrated control part; by adopting a fitting measurement mode, the measured data is more accurate, meanwhile, pneumatic separation and disassembly are more efficient, and the problems that an existing tree perimeter measuring instrument is not provided with an auxiliary positioning structure, the measuring precision is low, and fitting positioning cannot be achieved for large tree measurement are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tree measurement, in particular to a tree perimeter measuring instrument. BACKGROUND

[0002] In actual garden landscape inspection and other work, the perimeter of the tree is measured in order to know the growth of the tree, cultivate and protect the forest to obtain wood and other forest products, and utilize the natural characteristics of the trees to play a protective role. The production department is an important part of the national economy. The forestry department has a special statistical department to conduct statistical tree perimeter, tree diameter and tree height. The data obtained can accurately analyze and manage the garden.

[0003] However, the existing tree perimeter measuring instrument does not have an auxiliary positioning structure, the measurement accuracy is low, and the positioning cannot be achieved for larger trees. At the same time, it cannot achieve auxiliary air pressure rapid separation, on the one hand, it is easy to damage the bark, and at the same time, the disassembly efficiency is low, and it does not have an auxiliary control nail structure, which is not efficient, depends on manual pressing, and is not efficient and convenient. SUMMARY

[0004] Therefore, the present application provides a tree perimeter measuring instrument which has a measuring connecting piece that can ensure the overall detection accuracy, is not disturbed by the tree outer diameter profile, and can ensure efficiency and simple and flexible operation.

[0005] The present application provides a tree perimeter measuring instrument, which comprises an installation support part, a ventilation winding part rotatably connected to the installation support part, a measuring connecting piece fixedly connected to the ventilation winding part, a row of positioning connecting pieces fixedly connected to the measuring connecting piece, a limiting friction piece slidably connected to the installation support part, two nail pressing devices fixedly connected to the installation support part, a gas pressure supply part fixedly connected to the installation support part, the gas pressure supply part rotatably connected to the ventilation winding part, a winding and expansion integrated control part rotatably connected to the gas pressure supply part, the winding and expansion integrated control part slidably connected to the ventilation winding part, a positioning safety device slidably connected to the winding and expansion integrated control part, the positioning safety device inserted into the ventilation winding part, the limiting friction piece elastically attached to the ventilation winding part, the installation support part comprising a winding installation cylinder, a protective rotating roller and a holding auxiliary frame, the winding installation cylinder rotatably connected to the protective rotating roller, and the winding installation cylinder fixedly connected to two holding auxiliary frames.

[0006] Further, the installation support part comprises a holding rubber handle fixedly connected to the two holding auxiliary frames.

[0007] Further, the air pressure supply part comprises an air pressure docking disc, an inflation auxiliary air bag, a pressing auxiliary disc and a rotating connecting seat, the air pressure docking disc is fixedly connected on the winding installation cylinder, a gas connection cylinder is rotatably connected on the air pressure docking disc, the inflation auxiliary air bag is fixedly connected on the air pressure docking disc, the pressing auxiliary disc is fixedly connected on the inflation auxiliary air bag, and the rotating connecting seat is fixedly connected on the pressing auxiliary disc.

[0008] Further, the winding and expanding integrated control part comprises a winding and expanding sliding column, a winding control hand wheel, a positioning connecting ring and a reset tension spring, the winding and expanding sliding column is slidingly connected on the sealing sliding cylinder, a rotating connecting seat is rotatably connected on the winding and expanding sliding column, the winding control hand wheel is fixedly connected on the winding and expanding sliding column, the positioning connecting ring is fixedly connected on the winding and expanding sliding column, the reset tension spring is sleeved on the winding and expanding sliding column, and the reset tension spring is connected between the positioning connecting ring and the side surface of the gas connection cylinder.

[0009] Further, the measuring connecting piece comprises a measuring connecting belt, expanding air bags and a positioning connecting rod, a groove is arranged in the middle of the measuring connecting belt, the measuring connecting belt is fixedly connected on the gas connection cylinder, two expanding air bags are fixedly connected on the measuring connecting belt, the two expanding air bags are respectively communicated with the gas holes, the positioning connecting rod is fixedly connected on the end of the measuring connecting belt, the bottom of the positioning connecting rod is in a conical structure, and a scale is arranged on the measuring connecting belt.

[0010] Further, the nail pressing device comprises two nail pressing rotating frames, two rotating nail pressing shafts and nail pressing auxiliary rollers, the two rotating nail pressing shafts are respectively fixedly connected on the winding installation cylinder, the rotating nail pressing shafts are rotatably connected on the nail pressing rotating frames, the nail pressing auxiliary rollers are fixedly connected on the rotating nail pressing shafts, and the nail pressing auxiliary rollers are aligned with a row of positioning connecting discs.

[0011] Further, the positioning connecting piece comprises a positioning connecting disc and a positioning conical block, the positioning connecting disc is fixedly connected on the measuring connecting belt, and the positioning conical block is fixedly connected on the bottom of the positioning connecting disc.

[0012] Further, the limiting friction piece comprises two limiting sliding shafts, two limiting auxiliary tension springs and two limiting auxiliary discs, the two limiting sliding shafts are respectively slidingly connected on the winding installation cylinder, the limiting auxiliary tension springs are respectively sleeved on the limiting sliding shafts, the limiting auxiliary tension springs are respectively fixedly connected between the limiting sliding shafts and the winding installation cylinder, the limiting auxiliary discs are fixedly connected on the bottoms of the limiting sliding shafts, rubber pads are arranged on the bottoms of the limiting auxiliary discs, and the limiting auxiliary discs are elastically attached to the outside of the limiting discs.

[0013] Further, the positioning safety part comprises a limiting auxiliary shaft, a positioning connecting tension spring and a positioning shaft support, the limiting auxiliary shaft is slidingly connected on the winding control hand wheel, the positioning connecting tension spring is sleeved on the limiting auxiliary shaft, the positioning shaft support is fixedly connected on the limiting auxiliary shaft, the limiting auxiliary shaft is inserted in the sealing sliding cylinder, and the positioning connecting tension spring is connected between the winding control hand wheel and the positioning shaft support.

[0014] Further, the ventilation winding part comprises a ventilation connecting cylinder, a limiting disc, a ventilation hole and a sealing sliding cylinder, the ventilation connecting cylinder is rotationally connected on the winding mounting cylinder, two limiting discs are fixedly connected on the ventilation connecting cylinder, two ventilation holes are formed in the ventilation connecting cylinder, the sealing sliding cylinder is fixedly connected on the ventilation connecting cylinder, and a hexagonal hole is formed in the sealing sliding cylinder.

[0015] Beneficial effects

[0016] The measuring instrument adopts the fitting measurement mode, the measurement data is more accurate, the pneumatic separation is more efficient, the damage to the tree is reduced, the roller pressing installation is realized, and the installation is more efficient and labor-saving.

[0017] In addition, by adopting the air pressure supply part, the positioning conical blocks can be separated from the tree by air pressure, the dismounting efficiency is improved, the damage to the tree bark caused by directly pulling and pulling during dismounting in the actual use process is avoided, the overall structure is simple and practical, the structure dismounting flexibility is ensured, the positioning safety part can realize safety positioning and avoid accidental touch, the winding expansion integrated control part can assist in driving the ventilation connecting cylinder to rotate, assist in winding the measurement connecting belt, ensure the measurement connecting belt use flexibility, and drive the pressing auxiliary disc to press the auxiliary air bag by pulling, assist in exhausting, the structure is simple, the six-sided column structure characteristics of the winding expansion sliding column are utilized, the structure is ingenious and reasonable, the auxiliary air bag can be exhausted by pulling the winding expansion sliding column, the expansion air bag is introduced, the expansion air bag is inflated, the measurement connecting belt is moved outward, the positioning conical blocks are separated, the winding expansion sliding column is loosened, the reset tension spring is pulled, the overall structure is simple and practical, the structure use flexibility is ensured, the ventilation connecting cylinder is driven to rotate by rotating the winding expansion sliding column, the overall structure is simple and practical, the operation is flexible, and the structure is reasonable and compact.

[0018] Furthermore, by employing a set of push-button devices, auxiliary pressing and positioning of the connecting parts can be achieved without manual pressing. The positioning cone blocks can be quickly inserted into the bark while circling the outer diameter of the tree. This avoids the time-consuming and laborious manual pressing, while ensuring the pressing quality of a row of positioning cone blocks. The overall structure is simpler, more practical, and more flexible in use. The set of limiting friction components enables the limiting disc of the auxiliary friction limiting setting, improving the rotation and winding quality of the ventilation connecting cylinder. The push-button devices facilitate hand-held rolling pressing. Two push-button devices are attached to the tree's surface and moved around the outer circumference of the bark. During this process, the measuring connecting strip is pulled out, and the positioning cone blocks are pressed into the bark by the push-button auxiliary roller pressing the positioning connecting disc. The overall structure is simple, easy to install, and more flexible in use.

[0019] Furthermore, by employing the designated positioning connectors, efficient positioning can be achieved. The designated positioning connectors, in conjunction with the designated measuring connectors, can help fit the tree bark without being affected by the tree's outer contour, ensuring the accuracy of the circumference measurement. The designated ventilated winding section can assist in the winding process. The structure is compact and highly portable. The designated installation support section can be held with one hand, making it more flexible and convenient to use. The structure is simple and highly reliable. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0021] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0022] In the attached diagram:

[0023] Figure 1 This is a schematic diagram of the overall structure of the measuring instrument of the present invention.

[0024] Figure 2 This is a partial cross-sectional view of the measuring instrument of the present invention.

[0025] Figure 3 This is a cross-sectional schematic diagram of the internal structure of the measuring instrument of the present invention.

[0026] Figure 4 This is a schematic diagram of the bottom structure of the measuring instrument of the present invention.

[0027] Figure 5 This is a schematic diagram of the mounting support structure of the present invention.

[0028] Figure 6 This is a schematic diagram of the ventilation and winding section structure of the present invention.

[0029] Figure 7It is the schematic diagram of the measuring connecting piece structure of the present application.

[0030] Figure 8 It is the schematic diagram of the limiting friction piece structure of the present application.

[0031] Figure 9 It is the schematic diagram of the air pressure supply part structure of the present application.

[0032] Figure 10 It is the schematic diagram of the winding and expanding integrated control part structure of the present application.

[0033] List of reference signs

[0034] 1, mounting support part; 101, winding mounting cylinder; 102, protective rotating roller; 103, holding auxiliary frame; 104, holding rubber handle; 2, ventilation winding part; 201, ventilation connecting cylinder; 202, limiting disc; 203, ventilation hole; 204, sealing sliding cylinder; 3, measuring connecting piece; 301, measuring connecting belt; 302, expanding air bag; 303, positioning connecting rod; 4, positioning connecting piece; 401, positioning connecting disc; 402, positioning conical block; 5, limiting friction piece; 501, limiting sliding shaft; 502, limiting auxiliary tension spring; 503, limiting auxiliary disc; 6, nail pressing device; 601, nail pressing rotating frame; 602, rotating nail pressing shaft; 603, nail pressing auxiliary roller; 7, air pressure supply part; 701, air pressure butt joint disc; 7011, inflating auxiliary air bag; 702, pressing auxiliary disc; 703, rotating connecting seat; 8, winding and expanding integrated control part; 801, winding and expanding sliding column; 802, winding control hand wheel; 803, positioning connecting ring; 804, reset tension spring; 9, positioning safety piece; 901, limiting auxiliary shaft; 902, positioning connecting tension spring; 903, positioning shaft frame. DETAILED DESCRIPTION

[0035] In order to make the purpose, scheme and advantages of the technical solutions of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the specific embodiments of the present application. Unless otherwise specified, the terms used herein have the meanings commonly used in the art. The same reference signs in the drawings represent the same components.

[0036] Embodiment: Please refer to Figures 1 to 10 shown:

[0037] The tree circumference measuring instrument comprises an installation supporting part 1, a ventilation rolling part 2 rotatably connected to the installation supporting part 1, a measuring connecting piece 3 fixedly connected to the ventilation rolling part 2, a row of positioning connecting pieces 4 fixedly connected to the measuring connecting piece 3, a limiting friction piece 5 slidably connected to the installation supporting part 1, two nail pressing devices 6 fixedly connected to the installation supporting part 1, an air pressure supply part 7 fixedly connected to the installation supporting part 1, the air pressure supply part 7 rotatably connected to the ventilation rolling part 2, a rolling and expanding integrated control part 8 rotatably connected to the air pressure supply part 7, the rolling and expanding integrated control part 8 slidably connected to the ventilation rolling part 2, a positioning safety piece 9 slidably connected to the rolling and expanding integrated control part 8, the positioning safety piece 9 inserted into the ventilation rolling part 2, the limiting friction piece 5 elastically attached to the ventilation rolling part 2, and the installation supporting part 1 comprising a rolling installation cylinder 101, a protective rotating roller 102 rotatably connected to the rolling installation cylinder 101, and two holding auxiliary frames 103 fixedly connected to the rolling installation cylinder 101.

[0038] The installation supporting part 1 comprises a holding rubber handle 104 fixedly connected to the two holding auxiliary frames 103, the ventilation rolling part 2 comprises a ventilation connecting cylinder 201 rotatably connected to the rolling installation cylinder 101, two limiting discs 202 fixedly connected to the ventilation connecting cylinder 201, two ventilation holes 203 formed in the ventilation connecting cylinder 201, and a sealing sliding cylinder 204 fixedly connected to the ventilation connecting cylinder 201, the sealing sliding cylinder 204 is provided with a hexagonal hole, the measuring connecting piece 3 comprises a measuring connecting belt 301 provided with a groove in the middle, two expanding air bags 302 fixedly connected to the measuring connecting belt 301, and a positioning connecting rod 303 fixedly connected to the end of the measuring connecting belt 301 and tapered at the bottom, the measuring connecting belt 301 is fixedly connected to the ventilation connecting cylinder 201, the two expanding air bags 302 are respectively communicated with the ventilation holes 203, and the measuring connecting belt 301 is provided with a scale, the positioning connecting piece 4 comprises a positioning connecting disc 401 fixedly connected to the measuring connecting belt 301 and a positioning tapered block 402 fixedly connected to the bottom of the positioning connecting disc 401, the positioning connecting piece 4 can assist in efficient positioning work, the positioning connecting piece 4 cooperates with the measuring connecting piece 3 to assist in adhering to the bark of the tree without being affected by the outer contour of the tree, ensuring the accuracy of the circumference measurement, the ventilation rolling part 2 can assist in rolling work, has a small structure and high portability, the installation supporting part 1 can be held with one hand, is more flexible and convenient to use, has a simple structure and high reliability.

[0039] The limiting friction part 5 comprises two limiting sliding shafts 501, two limiting auxiliary tension springs 502 and a limiting auxiliary disc 503. The two limiting sliding shafts 501 are slidingly connected to the winding installation cylinder 101. The two limiting auxiliary tension springs 502 are sleeved on the two limiting sliding shafts 501 and fixedly connected between the limiting sliding shafts 501 and the winding installation cylinder 101. The limiting auxiliary disc 503 is fixedly connected to the bottom of the two limiting sliding shafts 501. The bottom of the limiting auxiliary disc 503 is provided with a rubber pad, and the bottom of the limiting auxiliary disc 503 is elastically attached to the outside of the limiting disc 202. The nail pressing device 6 comprises two nail pressing rotating frames 601, two rotating nail pressing shafts 602 and a nail pressing auxiliary roller 603. The two rotating nail pressing shafts 602 are fixedly connected to the winding installation cylinder 101. The two nail pressing rotating frames 601 are rotatably connected to the rotating nail pressing shafts 602. The nail pressing auxiliary roller 603 is fixedly connected to the rotating nail pressing shaft 602 and aligned with the row of positioning connecting discs 401. The nail pressing device 6 can assist in pressing the positioning connecting part 4, without manual pressing. When the tree trunk is wound, the positioning conical blocks 402 can be quickly inserted into the bark. On the one hand, manual pressing is avoided, and the pressing quality of the row of positioning conical blocks 402 is guaranteed. The overall structure is simple and practical, and the overall structure is more flexible to use. The limiting friction part 5 can assist in frictionally limiting the limiting disc 202, improve the winding quality of the ventilation connecting cylinder 201, and assist in rolling and pressing by the nail pressing device 6. The two nail pressing devices 6 are attached to the outer surface of the tree trunk, and the connecting belt 301 is measured and connected during the movement around the outer periphery of the bark. The positioning conical blocks 402 are inserted into the bark by the nail pressing auxiliary roller 603. The overall structure is simple, convenient to install and more flexible to use.

[0040] The air pressure supply part 7 comprises: an air pressure docking disc 701, an air filling auxiliary air bag 7011, a pressing auxiliary disc 702 and a rotating connecting seat 703, the air pressure docking disc 701 is fixedly connected on the winding installation cylinder 101; the air pressure docking disc 701 is rotatably connected with the air connection cylinder 201; the air pressure docking disc 701 is fixedly connected with the air filling auxiliary air bag 7011; the air filling auxiliary air bag 7011 is fixedly connected with the pressing auxiliary disc 702; the pressing auxiliary disc 702 is fixedly connected with the rotating connecting seat 703; the winding expansion integrated control part 8 comprises: a winding expansion sliding column 801, a winding control hand wheel 802, a positioning connecting ring 803 and a reset tension spring 804, the winding expansion sliding column 801 is slidingly connected on the sealing sliding cylinder 204; the winding expansion sliding column 801 is rotatably connected with the rotating connecting seat 703; the winding expansion sliding column 801 is fixedly connected with the winding control hand wheel 802; the winding expansion sliding column 801 is fixedly connected with the positioning connecting ring 803; the reset tension spring 804 is sleeved on the winding expansion sliding column 801; the reset tension spring 804 is connected between the positioning connecting ring 803 and the side surface of the air connection cylinder 201; the positioning safety part 9 comprises: a limiting auxiliary shaft 901, a positioning connecting tension spring 902 and a positioning shaft support 903, the limiting auxiliary shaft 901 is slidingly connected on the winding control hand wheel 802; the limiting auxiliary shaft 901 is sleeved with the positioning connecting tension spring 902; the positioning shaft support 903 is fixedly connected on the limiting auxiliary shaft 901; the limiting auxiliary shaft 901 is inserted into the sealing sliding cylinder 204;The positioning connecting tension spring 902 is connected between the winding control hand wheel 802 and the positioning shaft support 903, and through the air pressure supply part 7, the positioning conical blocks 402 can be separated from the tree by air pressure, the dismounting efficiency is improved, the damage to the tree bark caused by directly pulling and pulling during dismounting is avoided, the overall structure is simple and practical, the structural dismounting flexibility is ensured, the safety positioning is realized through the positioning safety part 9, the mistaken touch is avoided, the winding and expansion integrated control part 8 is arranged, on the one hand, the rotation of the air connection cylinder 201 is realized, the winding and measuring connecting belt 301 is realized, the use flexibility of the measuring connecting belt 301 is ensured, and on the other hand, the inflation auxiliary air bag 7011 is pressed by pulling the pressing auxiliary disc 702, the auxiliary exhaust is realized, the structure is simple, the hexagonal column structure characteristics of the winding expansion sliding column 801 are utilized, the structure is ingenious and reasonable, when the winding expansion sliding column 801 is pulled, the inflation auxiliary air bag 7011 is exhausted, the expansion air bag 302 is introduced, at this time, the expansion air bag 302 is inflated, the measuring connecting belt 301 is moved outward, the positioning conical block 402 is separated, the winding expansion sliding column 801 is loosened, the reset is realized through the reset tension spring 804, the overall structure is simple and practical, the use flexibility of the structure is ensured, the winding expansion sliding column 801 is rotated, the air connection cylinder 201 is driven to rotate and wind, the overall structure is simple and practical, the operation is flexible, and the structure is reasonable and compact.

[0041] The specific use mode and effect of the embodiment are as follows: in the application, first, the positioning connecting rod 303 is inserted into the tree bark to position the measured height, then the two nail devices 6 are attached to the outer surface of the tree, and are moved around the outer periphery of the tree bark, in the process, the measuring connecting belt 301 is taken out, in the process, the positioning conical block 402 is pressed and inserted into the tree bark through the rolling and pressing of the positioning connecting disc 401 by the nail auxiliary roller 603, under the pulling of the limiting auxiliary tension spring 502, the limiting auxiliary disc 503 is always elastically attached to the limiting disc 202 to assist in limiting work, at this time, the scale parameters of the measuring connecting belt 301 are observed, the limiting sealing sliding cylinder 204 is released by pulling the positioning shaft support 903, when the winding expansion sliding column 801 is pulled, the inflation auxiliary air bag 7011 is exhausted, the expansion air bag 302 is introduced, at this time, the expansion air bag 302 is inflated, the measuring connecting belt 301 is moved outward, the positioning conical block 402 is separated, the winding expansion sliding column 801 is loosened, the reset is realized through the reset tension spring 804, the overall structure is simple and practical, the use flexibility of the structure is ensured, and the winding work is realized by rotating the winding expansion sliding column 801.

[0042] The above descriptions are only some exemplary embodiments of the present application, but not intended to limit the protection scope of the present application, which is defined by the appended claims.

Claims

1. A tree perimeter measuring instrument, characterized in that, Includes an installation support (1); a ventilated winding section (2) is rotatably connected to the installation support (1); a measuring connector (3) is fixedly connected to the ventilated winding section (2); a row of positioning connectors (4) is fixedly connected to the measuring connector (3); a limit friction component (5) is slidably connected to the installation support (1); two pushpin devices (6) are fixedly connected to the installation support (1); an air pressure supply section (7) is fixedly connected to the installation support (1); the air pressure supply section (7) is rotatably connected to the ventilated winding section (2); and a winding and expansion integrated control section (7) is rotatably connected to the air pressure supply section (7). 8); The integrated winding and expanding control unit (8) is slidably connected to the ventilated winding unit (2); a positioning safety element (9) is slidably connected to the integrated winding and expanding control unit (8); the positioning safety element (9) is inserted into the ventilated winding unit (2); the limiting friction element (5) elastically fits the ventilated winding unit (2); the mounting support unit (1) includes: a winding mounting cylinder (101), a protective rotating roller (102), and a gripping auxiliary frame (103), the protective rotating roller (102) is rotatably connected to the winding mounting cylinder (101); two gripping auxiliary frames (103) are fixedly connected to the winding mounting cylinder (101).

2. The tree perimeter measuring instrument according to claim 1, characterized in that: The mounting support (1) includes: a grip rubber handle (104), and the grip rubber handle (104) is fixedly connected to the two grip auxiliary frames (103).

3. The tree perimeter measuring instrument according to claim 1, characterized in that: The ventilated winding section (2) includes: a ventilated connecting cylinder (201), a limiting plate (202), a vent hole (203), and a sealing sliding cylinder (204). The ventilated connecting cylinder (201) is rotatably connected to the winding mounting cylinder (101). Two limiting plates (202) are fixedly connected to the ventilated connecting cylinder (201). Two vent holes (203) are opened on the ventilated connecting cylinder (201). The sealing sliding cylinder (204) is fixedly connected to the ventilated connecting cylinder (201). The sealing sliding cylinder (204) is provided with a hexagonal hole.

4. A tree perimeter measuring instrument according to claim 3, characterized in that: The measuring connector (3) includes: a measuring connecting strap (301), an expansion airbag (302), and a positioning connecting rod (303). The measuring connecting strap (301) has a groove in the middle. The measuring connecting strap (301) is fixedly connected to the ventilation connecting cylinder (201). Two expansion airbags (302) are fixedly connected to the measuring connecting strap (301). The two expansion airbags (302) are respectively connected to the ventilation holes (203). The positioning connecting rod (303) is fixedly connected to the end of the measuring connecting strap (301), and the bottom of the positioning connecting rod (303) is a conical structure. The measuring connecting strap (301) has a scale.

5. A tree perimeter measuring instrument according to claim 4, characterized in that: The positioning connector (4) includes a positioning connector (401) and a positioning cone block (402). The positioning connector (401) is fixedly connected to the measuring connector (301). The positioning cone block (402) is fixedly connected to the bottom of the positioning connector (401).

6. A tree perimeter measuring instrument according to claim 3, characterized in that: The limiting friction component (5) includes: a limiting sliding shaft (501), a limiting auxiliary tension spring (502), and a limiting auxiliary disc (503). There are two limiting sliding shafts (501), which are slidably connected to the winding installation cylinder (101). A limiting auxiliary tension spring (502) is fitted on each of the two limiting sliding shafts (501). The two limiting auxiliary tension springs (502) are fixedly connected between the limiting sliding shaft (501) and the winding installation cylinder (101). The bottom of the two limiting sliding shafts (501) is fixedly connected to the limiting auxiliary disc (503). The bottom of the limiting auxiliary disc (503) is provided with a rubber pad. The bottom of the limiting auxiliary disc (503) elastically fits against the outside of the limiting disc (202).

7. A tree perimeter measuring instrument according to claim 5, characterized in that: The button device (6) includes: a button rotating frame (601), a rotating button shaft (602), and a button auxiliary roller (603). There are two button rotating frames (601), and the two rotating button shafts (602) are respectively fixedly connected to the winding mounting cylinder (101). The rotating button shafts (602) are rotatably connected to the two button rotating frames (601). The button auxiliary rollers (603) are fixedly connected to the rotating button shafts (602), and the button auxiliary rollers (603) are aligned with a row of positioning connecting discs (401).

8. A tree perimeter measuring instrument according to claim 3, characterized in that: The air pressure supply unit (7) includes: an air pressure docking plate (701), an inflation auxiliary airbag (7011), a pressing auxiliary plate (702), and a rotating connecting seat (703). The air pressure docking plate (701) is fixedly connected to the winding installation cylinder (101). A ventilation connecting cylinder (201) is rotatably connected to the air pressure docking plate (701). An inflation auxiliary airbag (7011) is fixedly connected to the air pressure docking plate (7011). A pressing auxiliary plate (702) is fixedly connected to the inflation auxiliary airbag (7011). A rotating connecting seat (703) is fixedly connected to the pressing auxiliary plate (702).

9. A tree perimeter measuring instrument according to claim 3, characterized in that: The integrated winding and expanding control unit (8) includes: a winding and expanding sliding column (801), a winding control handwheel (802), a positioning connecting ring (803), and a reset spring (804). The winding and expanding sliding column (801) is slidably connected to the sealing sliding cylinder (204). A rotating connecting seat (703) is rotatably connected to the winding and expanding sliding column (801). The winding control handwheel (802) is fixedly connected to the winding and expanding sliding column (801). The positioning connecting ring (803) is fixedly connected to the winding and expanding sliding column (801). The reset spring (804) is fitted onto the winding and expanding sliding column (801). The reset spring (804) is connected between the positioning connecting ring (803) and the side of the venting connecting cylinder (201).

10. A tree perimeter measuring instrument according to claim 9, characterized in that: The positioning safety component (9) includes: a limiting auxiliary shaft (901), a positioning connecting spring (902), and a positioning shaft bracket (903). The limiting auxiliary shaft (901) is slidably connected to the winding control handwheel (802). The positioning connecting spring (902) is fitted on the limiting auxiliary shaft (901). The positioning shaft bracket (903) is fixedly connected to the limiting auxiliary shaft (901). The limiting auxiliary shaft (901) is inserted into the sealing sliding cylinder (204). The positioning connecting spring (902) is connected between the winding control handwheel (802) and the positioning shaft bracket (903).

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