Forestry measuring device

Abstract

The invention discloses a forestry measuring device, and belongs to the technical field of forestry measurement, the forestry measuring device comprises a casing, the casing comprises a lower shell and an upper shell assembled on the lower shell, the lower shell and the upper shell are jointly provided with an excitation handle, a nail storage unit is jointly inserted in the lower shell and the upper shell, a positioning nail is assembled in the nail storage unit, and the positioning nail is inserted into the excitation handle. A knocking unit is arranged on one side of the nail storage unit and makes contact with one positioning nail through a knocking part, and a measuring unit is assembled at one end of the lower shell and one end of the upper shell. Through the arrangement of the knocking unit, the positioning nail and the measuring unit, the positioning nail and the main end plate at the end part of the ruler belt can be fixed on the surface of a tree through the knocking unit during measurement, so that the surface of the tree does not need to be pressed by a person with a hand when measurement is carried out around a circle; therefore, a single person can complete measurement work of perimeters and the like of trees with all diameters, and the growth heights of the trees can be measured in the next year after the positioning nails are left.

Description

Technical Field

[0001] The invention relates to the technical field of forestry measurement, and in particular to a forestry measurement device. Background Art

[0002] Forestry refers to the production sector that protects the ecological environment and maintains ecological balance, cultivates and protects forests to obtain timber and other forest products, and utilizes the natural characteristics of forests to play a protective role. It is an important part of the national economy. At present, in forestry engineering research, since the height of trees is a very important reference data, forestry workers need to measure the height of trees and other data in the work area they are responsible for, and then record and count the data.

[0003] Forestry surveying is the surveying work that provides maps or data for forest investigation, management status and evaluation. When measuring trees, the height and circumference of the trees are generally measured using a ruler-like measuring device.

[0004] In current forestry measurements, the measurement of tree diameter and circumference mainly relies on traditional tape measures. When operated by one person, due to the elasticity of the tape measure, one hand must fix the starting point of the tape measure, and the other hand must hold the tape measure around the tree to measure the circumference. This method is still applicable to the measurement of small-diameter trees, but when faced with large-diameter trees, it often requires two people to collaborate, which not only increases manpower requirements, but also slows down measurement efficiency. Summary of the invention

[0005] The purpose of the present invention is to propose a forestry measuring device to solve the problem that measuring the circumference of a tape measure is still applicable to the measurement of trees with small diameters, but when facing trees with large diameters, it often requires the cooperation of two people to complete the task.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A forestry measuring device comprises a housing, wherein the housing comprises a lower housing and an upper housing mounted on the lower housing, wherein the lower housing and the upper housing are jointly equipped with an excitation handle, wherein a nail storage unit is jointly inserted into the lower housing and the upper housing, wherein positioning nails are mounted in the nail storage unit, wherein a knocking unit is arranged on one side of the nail storage unit, wherein the knocking unit contacts one of the positioning nails through a knocking part, and wherein a measuring unit is mounted on one end of the lower housing and the upper housing;

[0008] The measuring unit comprises a reel, a measuring tape is wound on the reel, a main end plate is fixed to one end of the measuring tape, and a slot matching the main end plate is provided on the positioning pin, so that the main end plate can be fixed in the positioning pin at the front end;

[0009] The knocking unit includes a force storage piece mounted on the inner wall of the lower shell body, and a one-way resisting piece is provided on one side of the force storage piece. The one-way resisting piece is connected to the excitation handle through a pull rope, so that the force storage piece is released from the force storage state when driven by the excitation handle, so that the knocking part can nail the front end positioning nail together with the main end plate to the surface of the tree and measure the circumference and growth height through a ruler.

[0010] As a further description of the above technical solution:

[0011] The measuring unit also includes two connecting parts and a plurality of secondary end plates mounted on the ruler. The size of the secondary end plates is the same as that of the main end plates. The two connecting parts are respectively fixed to the lower shell and the upper shell. The upper mounting parts and the lower mounting parts are respectively fixed in the two connecting parts.

[0012] As a further description of the above technical solution:

[0013] A support is detachably fixed at the edge of the lower mounting member, the secondary end plate is plugged into the support, a stud is threadedly connected at the edge of the upper mounting member, and the stud passes through one end of the upper mounting member and is rotatably connected to a clamping seat for fixing the secondary end plate.

[0014] As a further description of the above technical solution:

[0015] The upper mounting member and the lower mounting member are jointly fixed with an outer shell, which includes a shell body and a shell cover, the shell cover is threadedly connected to the top of the shell body, and the reel is rotatably connected to the upper surface of the upper mounting member in the shell, and is rotatably connected to two meshing gears, one of the gears having a pin fixed to its bottom end, and one end of the pin that penetrates into the shell is plugged into the reel, so that the reel can rotate along with the gear.

[0016] As a further description of the above technical solution:

[0017] The force storage member includes a first guide rod fixed on the inner wall of the lower shell, a first spring is sleeved on the outer surface of the first guide rod, a moving member is slidably sleeved on one side of the outer surface of the first guide rod, the knocking part is fixed on the moving member, and two ends of the first spring are respectively connected to one end of the first guide rod and one side of the moving member through a first buffer pad;

[0018] The moving member passes through the lower shell and the upper shell respectively, and both ends thereof are fixed with a pull-back plate.

[0019] As a further description of the above technical solution:

[0020] The one-way blocking member comprises a vertical plate fixed on the inner bottom wall of the lower shell body, wherein two mounting grooves are arranged in the vertical plate, an extension plate is slidably mounted in the mounting groove, and one end of the extension plate is rotatably connected to the blocking plate.

[0021] As a further description of the above technical solution:

[0022] The two ends of the retaining plate and the extension plate that are rotatably connected are equipped with torsion springs, so that the retaining plate can limit the position of the moving part after it is recovered, so that the first spring can maintain a compressed state.

[0023] As a further description of the above technical solution:

[0024] A second spring is fixed to one side wall of the mounting groove, one end of the second spring is connected to the extension plate, one end of the pull rope is fixed to the end of the extension plate extending into the mounting groove, a guide rope tube is installed on the side of the bottom wall of the lower shell body close to the vertical plate, one end of the pull rope passes through the guide rope tube and is fixed to one end of the excitation handle.

[0025] As a further description of the above technical solution:

[0026] The nail storage unit includes a nail storage box inserted in the lower shell body, a nail pushing plate is slidably connected in the nail storage box, a third spring is fixed to one side of the nail pushing plate, one end of the third spring is fixed to the inner wall of the nail storage box, and the positioning nail is inserted in the nail storage box.

[0027] As a further description of the above technical solution:

[0028] A nail output shell is fixed on one side of the bottom wall of the lower shell body close to the nail storage box, and a second guide rod is installed on one side of the top wall and the bottom wall of the nail output shell through a long groove, and a limiting plate for limiting the position of the positioning nail is slidably sleeved on the two second guide rods, and a nail hammering member is fixed on the two limiting plates;

[0029] The outer surfaces of the two second guide rods are sleeved with fourth springs, and the two ends of the fourth springs are respectively fixed to the inner wall of the long groove and the limiting plate through second buffer pads.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0031] By setting the knocking unit, the positioning pin and the measuring unit, the positioning pin and the main end plate at the end of the tape can be fixed on the tree surface by the knocking unit during measurement, so that when measuring around a circle, there is no need for personnel to press the tree surface with their hands, so that a single person can complete the measurement of the circumference of trees of all diameters. At the same time, the positioning pin is reserved on the tree trunk, which provides convenient conditions for measuring the growth height of trees in a long period. After the tree grows taller, it can still cooperate with the measuring device to measure the growth height of the tree stably.

[0032] At the same time, after measuring for a week, you can directly pull the tape toward the tree on one side, remove a secondary end plate and clip it into the positioning nail at the front end, and then fix it on the surface of the tree following the positioning nail. At this time, you can measure the circumference of the tree on one side without removing the main end plate, and you can also measure the distance between the trees. After use, you can pull the main end plate and the secondary end plate out of the positioning nail for the next use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It shows a structural schematic diagram of a power storage state provided in an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the structure of an excitation state provided by an embodiment of the present invention is shown;

[0035] Figure 3 The embodiment of the present invention provides Figure 1 The enlarged view of point A in the middle;

[0036] Figure 4 A schematic structural diagram of a housing provided according to an embodiment of the present invention is shown;

[0037] Figure 5 A schematic diagram showing the structure of the interior of the lower housing according to an embodiment of the present invention is shown;

[0038] Figure 6 The embodiment of the present invention provides Figure 2 The enlarged view of point B in the middle;

[0039] Figure 7 The embodiment of the present invention provides Figure 5 Enlarged view of point C in the middle;

[0040] Figure 8 A schematic diagram of the split structure of a measuring unit provided according to an embodiment of the present invention is shown;

[0041] Fig. 9 It shows a schematic structural diagram of a nail storage unit provided by an embodiment of the present invention after being partially cut away;

[0042] Fig.10 A schematic structural diagram of a nail ejection housing according to an embodiment of the present invention is shown;

[0043] Fig.11 The embodiment of the present invention provides Fig. 9 The enlarged view of point D in the middle;

[0044] Fig.12 A schematic structural diagram of a positioning pin provided according to an embodiment of the present invention is shown.

[0045] Legend:

[0046] 10. Casing; 11. Lower casing; 12. Upper casing; 13. Excitation handle;

[0047] 20. Nail storage unit; 21. Nail storage box; 22. Nail push plate; 23. Third spring; 24. Nail ejector shell; 25. Second guide rod; 26. Limiting plate; 27. Nail hammer;

[0048] 30. striking unit; 31. force storage member; 311. first guide rod; 312. first spring; 313. moving member; 314. pull-back plate; 32. one-way resisting member; 321. vertical plate; 322. extension plate; 323. resisting plate; 324. torsion spring; 325. pull rope; 326. rope guide tube; 33. striking part;

[0049] 40. Positioning pins;

[0050] 50. Measuring unit; 51. Upper mounting piece; 52. Lower mounting piece; 53. Housing; 54. Reel; 55. Tape; 56. Main end plate; 57. Slot; 58. Gear; 59. Sub-end plate; 510. Support; 511. Stud; 512. Clamp seat. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Embodiment 1

[0053] like Figure 1 - Fig.12 As shown, the present invention provides:

[0054] A forestry measuring device includes a housing 10, the housing 10 includes a lower housing 11 and an upper housing 12 assembled on the lower housing 11, an excitation handle 13 is assembled on the lower housing 11 and the upper housing 12, a nail storage unit 20 is inserted into the lower housing 11 and the upper housing 12, a positioning nail 40 is assembled in the nail storage unit 20, a knocking unit 30 is arranged on one side of the nail storage unit 20, the knocking unit 30 contacts one of the positioning nails 40 through a knocking part 33, and a measuring unit 50 is assembled on one end of the lower housing 11 and the upper housing 12;

[0055] like Figure 1 , Figure 2 , Figure 4 , Fig. 9 and Fig.11As shown, the nail storage unit 20 includes a nail storage box 21 inserted into the lower shell 11, a nail pushing plate 22 is slidably connected in the nail storage box 21, a third spring 23 is fixed to one side of the nail pushing plate 22, one end of the third spring 23 is fixed to the inner wall of the nail storage box 21, and the positioning nail 40 is inserted into the nail storage box 21. Preferably, the nail pushing plate 22 passes through one end of the nail storage box 21 and is rotatably connected to a pull rod, and a clamping seat for clamping the pull rod is fixed on the outer wall of the nail storage box 21;

[0056] Specifically, when the positioning nails 40 in the nail storage box 21 are used up, the nail storage box 21 is first pulled out, and then the nail pushing plate 22 is pulled to a side away from the nail output shell 24 by the pull rod, and then the pull rod is inserted into the holder to fix the position of the nail pushing plate 22, and then new positioning nails 40 are put into the nail storage box 21, and then the nail storage box 21 is returned to the housing 10, and at this time, the pull rod is taken out of the holder, and the nail pushing plate 22 can slide;

[0057] A nail ejection shell 24 is fixed to one side of the inner bottom wall of the lower shell 11 close to the nail storage box 21, and a second guide rod 25 is installed on one side of the inner top wall and the inner bottom wall of the nail ejection shell 24 by opening a long groove, and a limiting plate 26 for limiting the position of the positioning nail 40 is slidably sleeved on the two second guide rods 25, and a fourth spring is sleeved on the outer surface of the two second guide rods 25, and the two ends of the fourth spring are respectively fixed to the inner wall of the long groove and the limiting plate 26 through a second buffer pad, and a hammer nail member 27 is fixed on the two limiting plates 26;

[0058] Specifically, when a row of positioning nails 40 are placed in the nail storage box 21 and the nail storage box 21 is inserted into the casing 10, the positioning nail 40 at the front end is in the nail output shell 24 and is blocked by the upper and lower limiting plates 26 to prevent it from moving so that it can correspond to the hammer member 27. After the front end positioning nail 40 is nailed to the surface of the tree by the hammer member 27, the nail pushing plate 22 pushes the row of positioning nails 40 forward under the action of the third spring 23, and then the front end positioning nail 40 is pushed into the nail output shell 24 again, and the limiting plate 26 is reset under the action of the fourth spring to continue to resist the front end positioning nail 40.

[0059] like Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown, the measuring unit 50 includes a reel 54, on which a tape 55 for measuring is wound, a main end plate 56 is fixed at one end of the tape 55, and a slot 57 adapted to the main end plate 56 is provided on the positioning pin 40, so that the main end plate 56 can be fixed in the positioning pin 40 at the front end, and the measuring unit 50 also includes two connecting parts, which are respectively fixed to the lower shell 11 and the upper shell 12, and an upper mounting member 51 and a lower mounting member 52 are respectively fixed in the two connecting parts;

[0060] The upper mounting member 51 and the lower mounting member 52 are fixed with a shell 53, which includes a shell and a shell cover. The shell cover is threadedly connected to the top of the shell. The reel 54 is rotatably connected to the upper surface of the upper mounting member 51 in the shell 53 and is rotatably connected to two meshing gears 58. A plug is fixed to the bottom end of one of the gears 58. One end of the plug penetrates into the shell 53 and is plugged into the reel 54. A central groove adapted to the plug is provided at the center of the reel 54. A key block is fixed on the inner wall of the central groove. A key groove adapted to the key block is provided on the plug, so that the plug can be inserted into the central groove, so that the plug can drive the reel 54 to rotate when the plug rotates, so that the reel 54 can rotate with the gear 58. Preferably, a handle is rotatably connected to one of the gears 58, which is in a folded state when not in use.

[0061] Specifically, after the measurement is completed, the handle is turned to a vertical state, and then the gear 58 is rotated to rotate the reel 54, thereby winding up the tape 55. It is worth noting that after winding up, the main end plate 56 at its end needs to be clamped in the positioning pin 40 at the front end.

[0062] like Figure 4 , Figure 5 and Figure 7 As shown, the knocking unit 30 includes a force storage member 31 mounted on the inner wall of the lower shell 11, and a one-way resisting member 32 is provided on one side of the force storage member 31. The one-way resisting member 32 is connected to the excitation handle 13 through a pull rope 325, so that the force storage member 31 is released from the force storage state under the driving of the excitation handle 13, so that the knocking part 33 can nail the front positioning nail 40 together with the main end plate 56 on the surface of the tree, and then the circumference and growth height can be measured through the tape 55;

[0063] The force storage member 31 includes a first guide rod 311 fixed on the inner wall of the lower shell 11, a first spring 312 is sleeved on the outer surface of the first guide rod 311, a moving member 313 is slidably sleeved on one side of the outer surface of the first guide rod 311, the knocking part 33 is fixed on the moving member 313, the two ends of the first spring 312 are respectively connected to one end of the first guide rod 311 and one side of the moving member 313 through a first buffer pad, and the moving member 313 passes through the lower shell 11 and the upper shell 12 respectively, and a pull-back plate 314 is fixed to both ends thereof;

[0064] The one-way stopper 32 comprises a vertical plate 321 fixed on the inner bottom wall of the lower shell 11, and two installation grooves are provided in the vertical plate 321, and an extension plate 322 is slidably installed in the installation groove, and one end of the extension plate 322 is rotatably connected to a stopper plate 323, and the two ends of the stopper plate 323 and the extension plate 322 rotatably connected are jointly equipped with a torsion spring 324, so that the stopper plate 323 can limit the position of the moving part 313 after it is recovered. It is worth noting that under the action of the torsion spring 324, the stopper plate 323 can only rotate successively. After being reset to the vertical state, it cannot rotate forward, so that it can resist the moving member 313 from moving forward in the vertical state, so that the first spring 312 can maintain a compressed state, a second spring is fixed to one side wall of the installation slot, one end of the second spring is connected to the extension plate 322, one end of the pull rope 325 is fixed to the end of the extension plate 322 extending into the installation slot, a guide rope tube 326 is installed on one side of the inner bottom wall of the lower shell 11 close to the vertical plate 321, and one end of the pull rope 325 passes through the guide rope tube 326 and is fixed to one end of the excitation handle 13;

[0065] The first spring 312 is used to push the movable member 313 into the locking cam 323, and the locking cam 323 is pressed downwardly to release the locking cam 323. The rope 325 pulls the extension plate 322 and the stop plate 323 to move into the installation groove until the stop plate 323 is no longer in contact with the moving member 313. At this time, the moving member 313 extends the first guide rod 311 under the action of the first spring 312 and moves forward quickly, and hits the hammer member 27 through the knocking part 33, thereby nailing the front end positioning nail 40 to the tree surface, and then fixes the main end plate 56 at the end of the tape 55 to the tree surface. At this time, the circumference of the tree can be obtained by reading the readings, and the diameter can be calculated. After releasing the excitation handle 13, the extension plate 322 and the stop plate 323 are driven to reset again under the action of the second spring.

[0066] Embodiment 2

[0067] like Figure 3 and Figure 8As shown, a plurality of secondary end plates 59 are sleeved on the ruler 55, and the size of the secondary end plates 59 is the same as that of the main end plates 56. A support 510 is detachably fixed at the edge of the lower mounting member 52, and the secondary end plates 59 are plugged into the support 510. A stud 511 is threadedly connected at the edge of the upper mounting member 51, and one end of the stud 511 passes through the upper mounting member 51 and is rotatably connected to a clamping seat 512 for fixing the secondary end plates 59.

[0068] Specifically, after the main end plate 56 is fixed and the circumference of the corresponding tree is measured, the handheld housing 10 pulls the tape 55 to one side until it contacts the tree on one side, and then rotates the stud 511 counterclockwise to move the clamp seat 512 upward to release the restriction on the secondary end plate 59, and then takes out a secondary end plate 59, and inserts its inward end into the positioning nail 40 at the outermost end at this time, and then after accumulating force, fixes the positioning nail 40 together with the secondary end plate 59 on the tree, and then circles around the tree again to measure the circumference of the tree, and at the same time, according to the stretched length, the distance between the trees can be measured;

[0069] Meanwhile, during forestry planting, before digging a hole, the main end plate 56 is fixed to the ground by the positioning nails 40, and then the ruler tape 55 is pulled to one side horizontally according to the required planting spacing, and then the planting hole is marked. After marking one side, mark the other side, and then mark both sides vertically. At the same time, continuous marking can be performed on both sides horizontally and vertically to avoid large position deviation when digging a hole;

[0070] At the same time, when planting, the positioning nail 40 is nailed together with the main end plate 56 on the surface of the first planted tree, and then the ruler tape 55 is pulled to one side to the next planting distance to ensure the distance between the trees after planting. At the same time, after the positioning nail 40 is nailed on the surface of the tree, when measuring the subsequent growth height, the main end plate 56 is inserted into the slot 57 on the positioning nail 40, and then the ruler tape 55 is pulled toward the ground to measure the growth height of the tree. After circling once, the circumference of the tree is measured and the diameter is calculated.

[0071] When the forestry measuring device is working / in use:

[0072] First, a row of positioning nails 40 are placed into the nail storage box 21, and the main end plate 56 at the end of the ruler tape 55 is inserted into the card slot 57 on the positioning nail 40 at the front end, and then the moving member 313 is pulled backward by the pull-back plate 314 to gradually compress the first spring 312 to accumulate force, and after accumulating force, the stop plate 323 abuts against the moving member 313 to prevent it from moving forward, and then the housing 10 is held by hand to align its nail-out end with the tree nailing position, and then the trigger handle 13 is held inward, so that the pull rope 325 pulls the extension plate 322 together with the stop plate 323 to move into the installation groove until the stop plate 323 is no longer in contact with the moving member 313;

[0073] At this time, the moving member 313 extends the first guide rod 311 under the action of the first spring 312 and moves forward quickly, and hits the hammer member 27 through the knocking part 33, thereby nailing the front end positioning nail 40 to the tree surface, and then fixing the main end plate 56 at the end of the tape 55 to the tree surface. At this time, the circumference of the tree can be obtained by reading the readings, and the diameter can be calculated. After releasing the excitation handle 13, the extension plate 322 and the stop plate 323 are driven to reset again under the action of the second spring, and other trees are measured repeatedly in this way.

[0074] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A forestry measurement device, comprising a housing (10), wherein the housing (10) comprises a lower housing (11) and an upper housing (12) mounted on the lower housing (11), wherein an excitation handle (13) is mounted on the lower housing (11) and the upper housing (12), wherein: A nail storage unit (20) is inserted into the lower shell (11) and the upper shell (12) together, and a positioning nail (40) is installed in the nail storage unit (20). A knocking unit (30) is provided on one side of the nail storage unit (20), and the knocking unit (30) contacts one of the positioning nails (40) through a knocking part (33). A measuring unit (50) is installed at one end of the lower shell (11) and the upper shell (12); The measuring unit (50) comprises a reel (54), a measuring tape (55) is wound on the reel (54), a main end plate (56) is fixed to one end of the measuring tape (55), and a slot (57) adapted to the main end plate (56) is provided on the positioning pin (40), so that the main end plate (56) can be fixed in the positioning pin (40) at the front end; The knocking unit (30) comprises a force storage member (31) mounted on the inner wall of the lower shell (11), a one-way resisting member (32) being provided on one side of the force storage member (31), the one-way resisting member (32) being connected to the excitation handle (13) via a pull rope (325), so that the force storage member (31) is released from the force storage state under the driving of the excitation handle (13), so that the knocking part (33) can nail the front end positioning nail (40) together with the main end plate (56) on the surface of the tree, and then the circumference and growth height can be measured by a ruler (55).

2. A forestry measurement device according to claim 1, characterized in that: The measuring unit (50) further comprises two connecting parts and a plurality of secondary end plates (59) sleeved on the ruler (55); the secondary end plates (59) have the same size as the primary end plates (56); the two connecting parts are respectively fixed to the lower shell (11) and the upper shell (12); and the upper mounting member (51) and the lower mounting member (52) are respectively fixed in the two connecting parts.

3. A forestry measurement device according to claim 2, characterized in that: A support (510) is detachably fixed at the edge of the lower mounting member (52), and the secondary end plate (59) is plugged into the support (510). A stud (511) is threadedly connected at the edge of the upper mounting member (51), and one end of the stud (511) passes through the upper mounting member (51) and is rotatably connected to a clamping seat (512) for fixing the secondary end plate (59).

4. A forestry measurement device according to claim 3, characterized in that: The upper mounting member (51) and the lower mounting member (52) are jointly fixed with a housing (53), and the reel (54) is rotatably connected to the housing (53). The upper surface of the upper mounting member (51) is rotatably connected to two meshing gears (58), and a plug is fixed to the bottom end of one of the gears (58). One end of the plug penetrates into the housing (53) and is plugged into the reel (54), so that the reel (54) can rotate along with the gear (58).

5. A forestry measurement device according to claim 1, characterized in that: The force storage member (31) comprises a first guide rod (311) fixed on the inner wall of the lower shell (11); a first spring (312) is sleeved on the outer surface of the first guide rod (311); a moving member (313) is slidably sleeved on one side of the outer surface of the first guide rod (311); the knocking part (33) is fixed on the moving member (313); and two ends of the first spring (312) are respectively connected to one end of the first guide rod (311) and one side of the moving member (313) through a first buffer pad; The moving member (313) passes through the lower shell (11) and the upper shell (12) at both ends, and a pull-back plate (314) is fixed to both ends.

6. A forestry measurement device according to claim 5, characterized in that: The one-way blocking member (32) comprises a vertical plate (321) fixed on the inner bottom wall of the lower shell (11), two installation grooves are provided in the vertical plate (321), an extension plate (322) is slidably installed in the installation groove, and one end of the extension plate (322) is rotatably connected to the blocking plate (323).

7. A forestry measurement device according to claim 6, characterized in that: The two ends of the stop plate (323) rotatably connected to the extension plate (322) are equipped with torsion springs (324) so ​​that the stop plate (323) can limit the position of the moving part (313) after it is recovered, so that the first spring (312) can remain in a compressed state.

8. A forestry measurement device according to claim 7, characterized in that: A second spring is fixed to one side wall of the installation groove, one end of the second spring is connected to the extension plate (322), one end of the pull rope (325) is fixed to the end of the extension plate (322) extending into the installation groove, and a guide rope tube (326) is installed on the side of the inner bottom wall of the lower shell (11) close to the vertical plate (321), and one end of the pull rope (325) passes through the guide rope tube (326) and is fixed to one end of the excitation handle (13).

9. A forestry measurement device according to claim 1, characterized in that: The nail storage unit (20) includes a nail storage box (21) inserted into the lower shell (11), a nail pushing plate (22) is slidably connected to the nail storage box (21), a third spring (23) is fixed to one side of the nail pushing plate (22), one end of the third spring (23) is fixed to the inner wall of the nail storage box (21), and the positioning nail (40) is inserted into the nail storage box (21).

10. A forestry measurement device according to claim 9, characterized in that: A nail ejection shell (24) is fixed on one side of the inner bottom wall of the lower shell (11) close to the nail storage box (21), and a second guide rod (25) is installed on one side of the inner top wall and the inner bottom wall of the nail ejection shell (24) by providing a long groove, and limiting plates (26) for limiting the position of the positioning nail (40) are slidably sleeved on the two second guide rods (25), and a nail hammering member (27) is fixed on the two limiting plates (26); The outer surfaces of the two second guide rods (25) are sleeved with fourth springs, and the two ends of the fourth springs are respectively fixed to the inner wall of the long groove and the limiting plate (26) through second buffer pads.

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