A convenient single-person shelter size measurement tool

Abstract

The present invention relates to the technical field of dimension measuring tools, and specifically proposes a portable single-person bunker dimension measuring tool, comprising: a cylinder, a height-fixing retracting group, a positioning support mechanism, and a radial measuring mechanism. The portable single-person bunker dimension measuring tool designed by the present invention is retracted and stored by cooperating with the cylinder, the height-fixing retracting group, and the radial measuring mechanism, which is not only convenient for carrying the measuring tool, but also can perform integrated measurement of the height, diameter, circularity, and upper and lower circularity deviation of the bunker, greatly improving the applicability of the measuring tool, and the folding and extending of the height-fixing retracting group and the radial measuring mechanism are performed through simple operations, reducing cumbersome use steps, thereby improving the convenience of use.

Description

Technical Field

[0001] The invention relates to the technical field of size measuring tools, and specifically provides a portable single-person shelter size measuring tool. Background Art

[0002] Military bunkers are important facilities for protecting soldiers and equipment. They can provide temporary or long-term protection. Military bunkers are divided into single-person bunkers, double-person bunkers, machine gun bunkers, etc. Among them, single-person bunkers are mainly used for the protection of a single soldier. Single-person bunkers are mostly circular pit-shaped structures, which provide better personal protection and shooting flexibility for individual soldiers. The structure of the circular single-person bunker is more uniform, which can better disperse the pressure from all directions and improve stability.

[0003] After a single-person shelter is dug, it needs to be measured to ensure that its size, shape and structure meet the design requirements, and to ensure the functionality and safety of the shelter pit. However, the current measurement tools are relatively single and cannot measure the height, radial size, circularity and consistency of the upper and lower circularity of the shelter at one time. If multiple measurement tools are used to measure the shelter size, it will increase the weight of the soldier's equipment and make it inconvenient to carry. Therefore, a convenient single-person shelter size measurement tool is urgently needed. Summary of the invention

[0004] In view of the above problems, an embodiment of the present application provides a portable single-person shelter size measurement tool to solve the technical problems in the related art.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solution: a portable single-person shelter size measuring tool, comprising: a telescopic cylinder, the telescopic cylinder is composed of a cylinder body and a fixed height retraction group that is slidably connected to its bottom up and down, a radial measuring mechanism is installed on the side wall of the cylinder body, and a positioning support mechanism is installed on the side wall of the cylinder body near the upper end.

[0006] The radial measuring mechanism includes a connecting disk slidably installed in the cylinder, and the top of the connecting disk is provided with installation limit grooves symmetrically arranged along its circumference. Fixed-length plates are hinged on the two installation limit grooves through torsion spring rods. The bottom of the installation limit grooves is used to limit the rotation of the fixed-length plates. A telescopic measuring group is installed at the end of the fixed-length plate away from the connecting disk. A connecting rod concentric with it is fixedly installed on the top of the connecting disk. After the connecting rod slides through the top of the cylinder, a telescopic rod is installed on the top of the connecting rod. A limit locking group is installed on the side wall of the connecting rod for locking the fixed-length plate when it is unfolded to a horizontal state. A lifting and sliding guide groove is provided on the side wall of the cylinder, which is connected to its inner cavity and symmetrically arranged along its circumference. An arc groove and an oblique overlapping groove that are connected in sequence and pass through the inner cavity of the cylinder are provided on one side of the lifting and sliding guide groove, and the fixed-length plate is slidably connected to the lifting and sliding guide groove.

[0007] The outer wall of the cylinder, the upper end surface of the fixed-length plate and the telescopic measuring group are all provided with scale values. The cylinder cooperates with the fixed-height contraction group to measure the dimension of the shelter in the height direction. After the two fixed-length plates are horizontal, they cooperate with the two telescopic measuring groups to measure the dimension of the shelter in the radial direction.

[0008] In a possible implementation, the top of the cylinder is provided with two receiving grooves symmetrically arranged along its circumference, and the lower end of the receiving groove is rotatably connected to a handle via a torsion spring rod.

[0009] In one possible implementation, the positioning support mechanism includes a connecting cylinder rotatably connected to the cylinder body, the connecting cylinder is located above the scale value on the cylinder body, and the connecting cylinder is hinged with support positioning rods evenly arranged along the connecting cylinder through a torsion spring rod. The outer wall of the connecting cylinder is connected to a connecting ring that slides up and down through a spline fit, and a connecting rod is hinged between the connecting ring and the support positioning rod.

[0010] In one possible implementation, the telescopic measuring group includes a storage groove opened at one end of the fixed-length ruler plate away from the connecting disk, a movable ruler is slidably connected in the storage groove, a locking member for locking the movable ruler is installed on the top of the fixed-length ruler plate, an error compensation component is installed on the end of the movable ruler away from the cylinder, and a scale value is set on the top of the movable ruler, and the scale value of the movable ruler gradually increases from the end close to the error compensation component to the center of the cylinder.

[0011] In one possible implementation, the locking member is a locking column installed on the top of one end of the fixed-length plate away from the cylinder, and the lower end of the locking column passes through the fixed-length plate and is connected to the fixed-length plate by threaded engagement.

[0012] In one possible implementation, the error compensation assembly includes a spring groove opened at one end of the movable ruler away from the cylinder, a compensation plate is slidably connected to the spring groove, a push spring is installed between one end of the compensation plate and the spring groove, and a ball is installed at the other end of the compensation plate.

[0013] In one possible implementation, the fixed height retraction group includes two arc-shaped slots opened at the bottom of the cylinder and arranged symmetrically along the circumference thereof, the arc-shaped slots and the lifting and sliding guide grooves are arranged alternately, and arc-shaped brackets that slide up and down are connected to the arc-shaped slots, and a fixed disk is installed at the bottom of the two arc-shaped brackets, and magnets 1 are installed on the opposite surfaces of the cylinder and the fixed disk, and the magnetic properties of the two magnets 1 are opposite. A through groove connected to the cylinder is opened at the lower end of the cylinder, and a latch assembly for locking the arc-shaped bracket is arranged in the through groove, and the bottom of the fixed disk is rotatably connected to a chassis, and the bottom of the chassis is installed with evenly arranged splines.

[0014] In one possible implementation, the latch assembly includes an installation box installed in the through slot, a lifting plate is installed on the top of the inner wall of the installation box through a spring rod, two insertion strips symmetrically arranged along its circumference are slidably connected to the side wall of the installation box, and balls are installed after the insertion strips pass through the installation box, and latch holes are provided on the opposite surfaces of the two arc-shaped brackets near the upper ends, a swing rod is hinged between the insertion strip and the lifting plate, a pull rod sliding through the bottom of the installation box is installed at the bottom of the lifting plate, and a receiving groove is provided on the top of the fixed plate.

[0015] In one possible implementation, the limit locking group includes a rotating cylinder mounted on a connecting rod by threaded engagement, and a baffle bar symmetrically arranged along its circumference is installed on the outer wall of the lower end of the rotating cylinder. When the baffle bar is rotated to the installation limit groove, the fixed-length plate is limit-locked. A through hole is opened on the top of the cylinder body extending upward and downward, and the through hole is used for the rotating cylinder to pass through when the connecting rod moves upward.

[0016] In one possible implementation, the telescopic rod includes a circular hole opened at the top of the connecting rod, a round rod is installed on the circular hole, the lower end side wall of the round rod is provided with a thread connected to the upper and lower ends of the inner wall of the circular hole by threaded cooperation, a cover plate is installed on the top of the round rod, and the bottom of the cover plate is provided with positioning rods symmetrically arranged along its circumference, and the top of the cylinder is provided with limiting holes corresponding to the positioning rods one by one, and the opposite surfaces of the cover plate and the cylinder are installed with two magnets, and the magnetic properties of the two magnets are opposite.

[0017] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. A portable single-person shelter dimension measuring tool designed by the present invention is retracted and stored through the cooperation of a cylinder, a fixed-height retraction group and a radial measuring mechanism. It is not only easy to carry, but also can perform integrated measurement of the shelter's height, diameter, roundness and upper and lower roundness deviations, which greatly improves the applicability of the measuring tool. The stowage and extension of the fixed-height retraction group and the radial measuring mechanism are performed through simple operations, which reduces cumbersome use steps and thereby improves the convenience of using the measuring tool.

[0018] 2. The positioning support mechanism in the present invention realizes the positioning of the telescopic cylinder and the center of the shelter by deploying a plurality of supporting positioning rods at the same angle under the coordinated action of the synchronous movement of the connecting rod and the connecting ring, and inserts the end of the supporting positioning rod into the side wall of the shelter, so that the supporting positioning rod can not only position the placement of the telescopic cylinder, but also support the upper end of the telescopic cylinder, thereby improving the stability of the telescopic cylinder and preventing the telescopic cylinder from shaking when rotating and affecting the measurement operation.

[0019] 3. The error compensation assembly in the present invention cooperates with the compensation plate and the push spring. When the roundness of the shelter is inconsistent, the compensation plate moves along the spring groove, thereby compensating for the shelter roundness error, thereby avoiding the telescopic measurement group and the fixed-length plate being directly stuck in the shelter when the shelter roundness is within the error range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0022] Figure 2 The present invention Figure 1 Enlarged view of point A in .

[0023] Figure 3 The present invention Figure 1 Enlarged view of point B in .

[0024] Figure 4 It is a three-dimensional structural schematic diagram of the cylinder body of the present invention and the lifting and sliding guide grooves, the oblique overlapping grooves, the arc-shaped slots and the through grooves opened thereon.

[0025] Figure 5 It is a three-dimensional structural schematic diagram of the radial measurement mechanism of the present invention.

[0026] Figure 6 This is a working state diagram of the measuring tool of the present invention when measuring a shelter.

[0027] Figure 7 The present invention Figure 6 Enlarged view of point C in the figure.

[0028] Figure 8 It is a schematic cross-sectional view of the structure of the mortise lock assembly of the present invention.

[0029] Figure numerals: 1, telescopic cylinder; 10, cylinder; 101, receiving groove; 102, handle; 3, fixed height retraction group; 30, arc-shaped slot; 31, arc-shaped bracket; 32, fixed plate; 33, magnet 1; 34, through groove; 340, installation box; 341, spring rod; 342, lifting plate; 343, insertion strip; 344, locking hole; 345, swing rod; 346, pull rod; 347, receiving groove; 35, chassis; 36, inserting gear; 2, radial measuring mechanism; 20, connecting plate; 21, fixed length plate; 22, telescopic measuring group; 220, storage slot; 221, locking piece; 222, movable ruler; 230, spring slot; 231, push spring; 232, compensation plate; 23, connecting rod; 280, round hole; 281, round rod; 282, cover plate; 283, positioning rod; 284, limiting hole; 285, magnet 2; 24, limiting locking group; 240, rotating cylinder; 241, blocking bar; 25, lifting and sliding guide groove; 26, arc groove; 27, oblique folding groove; 4, positioning support mechanism; 40, connecting cylinder; 41, supporting positioning rod; 42, connecting ring; 43, connecting rod; 5, shelter. DETAILED DESCRIPTION

[0030] 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.

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] See also Figure 1 A portable single-person shelter size measuring tool comprises a telescopic cylinder 1, which is composed of a cylinder 10 and a fixed height retracting group 3 connected with the bottom of the cylinder 10 by sliding up and down, a radial measuring mechanism 2 is installed on the side wall of the cylinder 10, and a positioning support mechanism 4 is installed on the side wall of the cylinder 10 near the upper end.

[0033] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6The radial measuring mechanism 2 includes a connecting disk 20 slidably mounted in the cylinder 10, and a mounting limit groove symmetrically arranged along its circumference is provided on the top of the connecting disk 20. A fixed-length plate 21 is hinged on the two mounting limit grooves through a torsion spring rod. The bottom of the mounting limit groove is used to limit the rotation of the fixed-length plate 21. A telescopic measuring group 22 is installed at one end of the fixed-length plate 21 away from the connecting disk 20. A connecting rod 23 concentric with the connecting disk 20 is fixedly installed on the top of the connecting disk 20, and the connecting rod 23 slides After it moves through the top of the cylinder 10, a telescopic rod is installed on the top of it. The side wall of the connecting rod 23 is installed with a limit locking group 24 for locking the fixed-length plate 21 when it is unfolded horizontally. The side wall of the cylinder 10 is provided with a lifting and sliding guide groove 25 which is connected with its inner cavity and arranged symmetrically along its circumference. One side of the lifting and sliding guide groove 25 is provided with an arc groove 26 and an oblique overlapping groove 27 which are connected in sequence and pass through the inner cavity of the cylinder 10. The fixed-length plate 21 is slidably connected to the lifting and sliding guide groove 25.

[0034] In the initial state, the height-fixing and retracting group 3 is stored at the lower end of the cylinder 10, and the length-fixing plate 21, the telescopic measuring group 22, the connecting rod 23 and the telescopic rod are all stored in the cylinder 10, thereby reducing the volume of the measuring tool for easy carrying.

[0035] See also Figure 1 and Figure 5 The outer wall of the cylinder 10, the upper end surface of the fixed-length plate 21 and the telescopic measuring group 22 are all provided with scale values. The cylinder 10 cooperates with the fixed-height contraction group 3 to measure the size of the shelter 5 in the height direction. After the two fixed-length plates 21 are in a horizontal state, they cooperate with the two telescopic measuring groups 22 to measure the size of the shelter 5 in the radial direction.

[0036] It should be noted in particular that the end dimension scale value of the fixed-length plate 21 close to the connecting disk 20 is the distance value between the center of the connecting disk 20 and this scale line, and the lowermost scale value on the cylinder 10 is the dimension distance between the bottom of the fixed-height shrinkage group 3 and the bottom of the cylinder 10 after the fixed-height shrinkage group 3 is unfolded.

[0037] The height-fixing retractable group 3 is pulled out from the bottom of the cylinder 10, so that the cylinder 10 and the height-fixing retractable group 3 are unfolded and used to measure the height of the shelter 5, and then the entire tool is placed into the shelter 5, and the center of the telescopic cylinder 1 and the shelter 5 is positioned by the positioning support mechanism 4, so that the bottom of the telescopic cylinder 1 is inserted into the center position of the bottom of the shelter 5, so as to facilitate the subsequent radial measurement of the shelter 5.

[0038] At this time, the end of the telescopic measuring group 22 slides in the oblique overlapping groove 27, and then the connecting rod 23 is pulled upward by the telescopic rod. When the connecting rod 23 drives the connecting plate 20 to move upward, the fixed-length plate 21 rotates along the hinge under the plug-in and limiting action of the telescopic measuring group 22 and the oblique overlapping groove 27 and drives the telescopic measuring group 22 to move to the outside of the cylinder 10 until the fixed-length plate 21 is horizontal and tightly against the bottom of the installation limit groove, and then the top of the fixed-length plate 21 is limited and locked by the limit locking group 24 to prevent the fixed-length plate 21 from rotating upward along its hinge during the measurement process, affecting the measurement operation.

[0039] Then, the telescopic measuring group 22 is unfolded until it contacts the inner wall of the shelter 5 , and the sum of the scale values ​​on the two telescopic measuring groups 22 is the diameter of the shelter 5 , thereby judging whether the diameter of the shelter 5 meets the requirements, and measuring the height of the shelter 5 through the scale on the cylinder 10 .

[0040] See also Figure 2 The top of the cylinder body 10 is provided with two receiving grooves 101 symmetrically arranged along its circumference. The lower end of the receiving groove 101 is rotatably connected to a handle 102 through a torsion spring rod. When in use, the handle 102 is rotated to a horizontal state, and the telescopic cylinder 1 is pressed down by the handle 102, and the telescopic cylinder 1 is rotated to improve the convenience of driving the telescopic cylinder 1.

[0041] See also Figure 1 and Figure 2 The positioning support mechanism 4 includes a connecting tube 40 rotatably connected to the cylinder body 10, the connecting tube 40 is located above the scale value on the cylinder body 10, and the connecting tube 40 is hinged with support positioning rods 41 evenly arranged along it through a torsion spring rod. In the initial state, when no external force is applied, the torsion spring rod drives the support positioning rod 41 to be vertical; the outer wall of the connecting tube 40 is connected to a connecting ring 42 that slides up and down through a spline fit, and a connecting rod 43 is hinged between the connecting ring 42 and the support positioning rod 41, and an insert cone (not shown in the figure) is installed at the end of the support positioning rod 41 away from the connecting tube 40.

[0042] After the measuring tool is placed in the shelter 5 as a whole, the supporting positioning rod 41 is pulled to unfold, and the supporting positioning rod 41 drives the connecting ring 42 to move upward through the connecting rod 43. The multiple supporting positioning rods 41 are unfolded at the same angle under the synchronous movement and cooperation of the connecting rod 43 and the connecting ring 42, thereby realizing the positioning of the telescopic tube 1 and the center of the shelter 5, and the insert cone at the end of the supporting positioning rod 41 can be inserted into the side wall of the shelter 5, so that the supporting positioning rod 41 can not only position the telescopic tube 1, but also support the upper end of the telescopic tube 1, thereby improving the stability of the telescopic tube 1 and avoiding shaking when the telescopic tube 1 rotates later to affect the measurement.

[0043] See also Figure 3 , Figure 5 and Figure 7 The telescopic measuring group 22 includes a receiving groove 220 opened at the end of the fixed-length ruler 21 away from the connecting plate 20, a movable ruler 222 is slidably connected in the receiving groove 220, a locking member 221 for locking the movable ruler 222 is installed on the top of the fixed-length ruler 21, an error compensation component is installed on the end of the movable ruler 222 away from the cylinder 10, and a scale value is set on the top of the movable ruler 222, and the scale value of the movable ruler 222 gradually increases from the end close to the error compensation component to the center of the cylinder 10.

[0044] See also Figure 3 and Figure 5 The locking member 221 is a locking column installed on the top of one end of the fixed-length plate 21 away from the cylinder 10. The lower end of the locking column passes through the fixed-length plate 21 and is connected to the fixed-length plate 21 by threaded engagement.

[0045] When the fixed-length plate 21 is horizontal, the movable ruler 222 is pulled out of the storage slot 220 of the fixed-length plate 21 by the error compensation assembly until the error compensation assembly contacts the inner wall of the shelter 5. At this time, the scale value on the movable ruler 222 located at the end of the fixed-length plate 21 is the radius value of the shelter 5. Then the locking column is rotated. During the rotation, the locking column moves downward by cooperating with the thread of the fixed-length plate 21 until the locking column and the top of the movable ruler 222 are tightly pressed, thereby realizing the locking of the fixed-length plate 21 and the movable ruler 222 after they are extended, so that the telescopic measurement group 22 can measure the roundness of the shelter 5 as the fixed-length plate 21 moves up and down and rotates.

[0046] See also Figure 5 and Figure 7 The error compensation component includes a spring groove 230 opened at one end of the movable ruler 222 away from the cylinder 10, a compensation plate 232 is slidably connected to the spring groove 230, a push spring 231 is installed between one end of the compensation plate 232 and the spring groove 230, and a ball is installed at the other end of the compensation plate 232.

[0047] Through the cooperation between the compensation plate 232 and the push spring 231, when the roundness of the shelter 5 is inconsistent, the compensation plate 232 moves along the spring groove 230, thereby compensating the error of the roundness of the shelter 5, and avoiding the telescopic measurement group 22 and the fixed-length plate 21 being directly stuck in the shelter 5 when the roundness of the shelter 5 is within the error range.

[0048] See also Figure 1 , Figure 4 and Figure 6The fixed height retraction group 3 includes two arc-shaped slots 30 opened at the bottom of the cylinder 10 and arranged symmetrically along the circumference thereof. The arc-shaped slots 30 are arranged alternately with the lifting and sliding guide grooves 25. An arc-shaped bracket 31 that slides up and down is connected to the arc-shaped slots 30. A fixed disk 32 is installed at the bottom of the two arc-shaped brackets 31. Magnets 33 are installed on the opposite surfaces of the cylinder 10 and the fixed disk 32. The magnetic properties of the two magnets 33 are opposite. A through slot 34 connected to the cylinder 10 is opened at the lower end of the cylinder 10. A latch assembly for locking the arc-shaped bracket 31 is arranged in the through slot 34. The bottom of the fixed disk 32 is rotatably connected to a chassis 35, and the bottom of the chassis 35 is installed with evenly arranged insert teeth 36.

[0049] See also Figure 1 , Figure 4 , Figure 6 and Figure 8 The latch assembly includes an installation box 340 installed in the through slot 34, a lifting plate 342 is installed on the top of the inner wall of the installation box 340 through a spring rod 341, and the side wall of the installation box 340 is slidably connected with two insertion strips 343 arranged symmetrically along its circumference, and the insertion strips 343 are installed with balls after passing through the installation box 340, and the opposite surfaces of the two arc-shaped brackets 31 are provided with latch holes 344 near the upper ends, and a swing rod 345 is hinged between the insertion strips 343 and the lifting plate 342, and a pull rod 346 that slides through the bottom of the installation box 340 is installed at the bottom of the lifting plate 342, and a receiving groove 347 is provided on the top of the fixed plate 32.

[0050] In the initial state, the arc bracket 31 is received in the arc slot 30, and the two magnets 33 are attracted, so that the measuring tool can be carried as a whole. An end cover (not shown in the figure) is also installed on the chassis 35 to cover the insert 36 to prevent people from being accidentally injured by the insert 36 during carrying. At this time, the installation box 340 and the pull rod 346 are both located in the receiving groove 347, and the ball at the end of the insert strip 343 is pressed against the receiving groove 347.

[0051] When in use, the fixed plate 32 is pulled to drive the arc bracket 31 to move out of the arc slot 30. During the movement of the arc bracket 31, the ball at the end of the insertion strip 343 moves from the receiving groove 347 to the arc bracket 31 until the insertion strip 343 is aligned with the locking hole 344. At this time, the spring rod 341 pushes the lifting plate 342 to move downward, and the swing rod 345 pushes the insertion strip 343 into the locking hole 344, thereby locking the arc bracket 31 to prevent the arc bracket 31 from moving into the arc slot 30 during the measurement process. Then, after the measuring tool is placed in the shelter 5 and positioned, the telescopic cylinder 1 is pressed down to make the insertion tooth 36 insert into the bottom of the shelter 5, thereby improving the stability of the measuring tool during measurement.

[0052] When it is necessary to fold up, push the pull rod 346 upward, the pull rod 346 drives the lifting plate 342 to move upward and squeeze the spring rod 341, and the lifting plate 342 drives the insertion strip 343 to move out of the locking hole 344 through the swing rod 345, thereby unlocking the arc bracket 31.

[0053] See also Figure 2 and Figure 5 The limit locking group 24 includes a rotating cylinder 240 which is sleeved on the connecting rod 23 by threaded fitting. The outer wall of the lower end of the rotating cylinder 240 is equipped with a baffle 241 which is symmetrically arranged along its circumference. When the baffle 241 is rotated to the installation limit groove, the fixed-length plate 21 is limited and locked. A through hole is opened on the top of the cylinder body 10 which runs through the top and bottom. The through hole is used to facilitate the rotating cylinder 240 to pass through when the connecting rod 23 moves upward.

[0054] When the fixed-length plate 21 rotates to a horizontal position, the rotating cylinder 240 is rotated, and the rotating cylinder 240 drives the blocking bar 241 to rotate onto the fixed-length plate 21, thereby locking the angle of the fixed-length plate 21 to prevent the fixed-length plate 21 from flipping during the measurement process. At this time, the bottom of the rotating cylinder 240 conflicts with the top of the connecting disk 20.

[0055] See also Figure 1 , Figure 2 , Figure 5 and Figure 6 The telescopic rod comprises a circular hole 280 formed at the top of the connecting rod 23, a circular rod 281 is mounted on the circular hole 280, a lower side wall of the circular rod 281 is provided with a thread connected to the upper and lower ends of the inner wall of the circular hole 280 by threaded cooperation, a cover plate 282 is mounted on the top of the circular rod 281, a positioning rod 283 symmetrically arranged along its circumference is mounted on the bottom of the cover plate 282, a limiting hole 284 corresponding to the positioning rod 283 is formed on the top of the cylinder 10, and magnets 285 are mounted on the opposite surfaces of the cover plate 282 and the cylinder 10, and the two magnets 285 have opposite magnetic properties.

[0056] In the initial state, the fixed-length ruler 21 is retracted into the cylinder 10, and the positioning rod 283 is inserted into the limiting hole 284, and the two magnets 285 are adsorbed and fixed; when in use, the connecting rod 23 is pulled upward to make the positioning rod 283 disengage from the limiting hole 284, and the fixed-length ruler 21 slides from the oblique overlapping groove 27 along the arc groove 26 into the lifting and sliding guide groove 25 and needs to continue to move downward, the cover plate 282 is rotated, and the cover plate 282 drives the round rod 281 to rotate, and the round rod 281 moves upward under the action of the thread cooperation between its lower end and the lower end of the inner wall of the circular hole 280 until the round rod 281 is disengaged from the thread at the lower end of the circular hole 280, and the round rod 281 can continue to move upward along the connecting rod 23 to cooperate with the thread of the upper inner wall of the circular hole 280, thereby increasing the length of the connecting rod 23, so that the connecting rod 23 can continue to push the fixed-length ruler 21 and the telescopic measuring group 22 to move downward along the axial direction of the cylinder 10 for measurement.

[0057] See also Figure 1-Figure 8 Working principle: In the first step, the height-fixing retracting group 3 is pulled out from the bottom of the cylinder 10, so that the cylinder 10 and the height-fixing retracting group 3 are unfolded to measure the height of the shelter 5, and then the tool is placed in the shelter 5 as a whole, and the telescopic cylinder 1 and the shelter 5 are positioned by the positioning support mechanism 4, so that the bottom of the telescopic cylinder 1 is inserted in the center position of the bottom of the shelter 5, so as to facilitate the radial measurement of the shelter 5 later.

[0058] In the second step, the connecting rod 23 is pulled upward by the telescopic rod. At this time, the end of the telescopic measuring group 22 is located in the oblique overlapping groove 27. When the connecting rod 23 drives the connecting plate 20 to move upward, the fixed-length plate 21 rotates along the hinge under the limiting action of the telescopic measuring group 22 and the oblique overlapping groove 27 and drives the telescopic measuring group 22 to move toward the outside of the cylinder 10 until the fixed-length plate 21 is horizontal and tightly against the bottom of the installation limit groove, and then the top of the fixed-length plate 21 is limited and locked by the limit locking group 24 to avoid the problem that the fixed-length plate 21 rotates upward along its hinge during the measurement process, affecting the measurement use; the telescopic measuring group 22 is unfolded until it conflicts with the inner wall of the shelter 5, and the sum of the scale values ​​on the two telescopic measuring groups 22 is the diameter of the shelter 5, and the height of the shelter 5 is measured by the scale on the cylinder 10.

[0059] The third step is to rotate the telescopic cylinder 1, which drives the fixed-length plate 21 and the telescopic measuring group 22 to rotate, so as to measure the roundness of the shelter 5, and rotate the fixed-length plate 21 into the lifting and sliding guide groove 25, and drive the fixed-length plate 21 and the telescopic measuring group 22 to move up and down through the connecting rod 23 and the telescopic rod, so as to measure whether the roundness of the upper end and the middle part of the inner wall of the shelter 5 deviates too much.

[0060] In summary, the measuring tool is not only easy to carry, but also can measure the height, diameter, circularity and upper and lower circularity deviation of the shelter 5, which greatly improves the practicability of the measuring tool.

[0061] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0062] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable single-person shelter size measurement tool, characterized in that: include: The telescopic cylinder (1) is composed of a cylinder (10) and a fixed height retracting group (3) connected to the bottom of the cylinder by sliding up and down, a radial measuring mechanism (2) is installed on the side wall of the cylinder (10), and a positioning support mechanism (4) is installed on the side wall of the cylinder (10) near the upper end; The radial measuring mechanism (2) comprises a connecting disk (20) slidably mounted in a cylinder (10), the top of the connecting disk (20) is provided with mounting limit grooves symmetrically arranged along its circumference, two mounting limit grooves are hinged with fixed-length plates (21) via torsion spring rods, the bottom of the mounting limit grooves is used to limit the rotation of the fixed-length plates (21), a telescopic measuring group (22) is mounted on one end of the fixed-length plates (21) away from the connecting disk (20), a connecting rod (23) concentric with the connecting disk (20) is fixedly mounted on the top of the connecting disk (20), and the connecting rod (23) slides After the cylinder (10) is moved through the top, a telescopic rod is installed on the top of the cylinder (10); a limit locking group (24) is installed on the side wall of the connecting rod (23) for locking the fixed-length plate (21) when it is unfolded to a horizontal state; a lifting and sliding guide groove (25) is opened on the side wall of the cylinder (10) and is communicated with the inner cavity thereof and is symmetrically arranged along its circumference; an arc groove (26) and an oblique overlapping groove (27) which are communicated with each other and pass through the inner cavity of the cylinder (10) in sequence are opened on one side of the lifting and sliding guide groove (25); and the fixed-length plate (21) is slidably connected to the lifting and sliding guide groove (25); The outer wall of the cylinder (10), the upper end surface of the fixed-length ruler (21) and the telescopic measuring group (22) are all provided with scale values. The cylinder (10) cooperates with the fixed-height contraction group (3) to measure the dimensions of the shelter (5) in the height direction. The two fixed-length rulers (21) are in a horizontal state and cooperate with the two telescopic measuring groups (22) to measure the dimensions of the shelter (5) in the radial direction.

2. A portable single-person shelter size measurement tool according to claim 1, characterized in that: The fixed height retraction group (3) comprises two arc-shaped slots (30) opened at the bottom of the cylinder (10) and arranged symmetrically along the circumference thereof. The arc-shaped slots (30) and the lifting and sliding guide grooves (25) are arranged in an alternating manner. An arc-shaped bracket (31) that slides up and down is connected in the arc-shaped slots (30). A fixing plate (32) is installed at the bottom of the two arc-shaped brackets (31). Magnets (33) are installed on the opposite surfaces of the cylinder (10) and the fixing plate (32). The two magnets (33) have opposite magnetic properties. A through slot (34) that is connected to the cylinder (10) is opened at the lower end of the cylinder (10). A latch assembly for locking the arc-shaped bracket (31) is arranged in the through slot (34). The bottom of the fixing plate (32) is rotatably connected to a base plate (35). The bottom of the base plate (35) is installed with evenly arranged insert teeth (36).

3. A portable single-person shelter size measurement tool according to claim 1, characterized in that: The telescopic rod comprises a circular hole (280) opened at the top of the connecting rod (23), a round rod (281) is installed on the circular hole (280), a lower side wall of the round rod (281) is provided with a thread connected to the upper and lower ends of the inner wall of the circular hole (280) by threaded matching, a cover plate (282) is installed on the top of the round rod (281), and a positioning plug rod (283) symmetrically arranged along its circumference is installed at the bottom of the cover plate (282), and a limiting hole (284) corresponding to the positioning plug rod (283) is opened on the top of the cylinder (10), and magnets (285) are installed on the opposite surfaces of the cover plate (282) and the cylinder (10), and the magnetic properties of the two magnets (285) are opposite.

4. A portable single-person shelter size measurement tool according to claim 2, characterized in that: The latch assembly comprises an installation box (340) installed in a through slot (34); a lifting plate (342) is installed on the top of the inner wall of the installation box (340) via a spring rod (341); two insertion strips (343) symmetrically arranged along its circumference are slidably connected to the side wall of the installation box (340); balls are installed after the insertion strips (343) penetrate the installation box (340); latch holes (344) are provided near the upper ends of the opposing surfaces of the two arc-shaped brackets (31); a swing rod (345) is hinged between the insertion strips (343) and the lifting plate (342); a pull rod (346) that slides through the bottom of the installation box (340) is installed at the bottom of the lifting plate (342); and a receiving groove (347) is provided at the top of the fixed plate (32).

5. A portable single-person shelter size measurement tool according to claim 1, characterized in that: The positioning support mechanism (4) comprises a connecting tube (40) rotatably connected to the cylinder (10), the connecting tube (40) being located above the scale value on the cylinder (10), the connecting tube (40) being hingedly connected to support positioning rods (41) evenly arranged along the connecting tube (40) via a torsion spring rod, the outer wall of the connecting tube (40) being connected to a connecting ring (42) that slides up and down via a spline fit, and a connecting rod (43) being hingedly connected between the connecting ring (42) and the support positioning rod (41).

6. A portable single-person shelter size measurement tool according to claim 1, characterized in that: The telescopic measuring group (22) comprises a receiving groove (220) provided at one end of the fixed-length ruler plate (21) away from the connecting plate (20), a movable ruler (222) being slidably connected in the receiving groove (220), a locking member (221) for locking the movable ruler (222) being installed at the top of the fixed-length ruler plate (21), an error compensation component being installed at one end of the movable ruler (222) away from the cylinder (10), a scale value being arranged at the top of the movable ruler (222), and the scale value of the movable ruler (222) gradually increasing from the end close to the error compensation component toward the center of the cylinder (10).

7. A portable single-person shelter size measurement tool according to claim 1, characterized in that: The limit locking group (24) comprises a rotating cylinder (240) which is sleeved on the connecting rod (23) by means of threaded engagement, and the outer wall of the lower end of the rotating cylinder (240) is provided with a stop bar (241) which is symmetrically arranged along its circumference, and when the stop bar (241) is rotated to the installation limit groove, the fixed length plate (21) is limit-locked, and a through hole which passes through from top to bottom is opened on the top of the cylinder body (10).

8. A portable single-person shelter size measurement tool according to claim 6, characterized in that: The error compensation component comprises a spring groove (230) provided at one end of the movable ruler (222) away from the cylinder (10); a compensation plate (232) is slidably connected to the spring groove (230); a push spring (231) is installed between one end of the compensation plate (232) and the spring groove (230); and a ball bearing is installed at the other end of the compensation plate (232).

9. A portable single-person shelter size measurement tool according to claim 6, characterized in that: The locking member (221) is a locking column installed on the top of one end of the fixed-length plate (21) away from the cylinder (10), and the lower end of the locking column penetrates the fixed-length plate (21) and is connected to the fixed-length plate (21) by means of threaded engagement.

10. The portable single-person shelter size measuring tool according to claim 1, characterized in that: The top of the cylinder (10) is provided with two receiving grooves (101) symmetrically arranged along its circumference, and the lower end of the receiving groove (101) is rotatably connected to a handle (102) via a torsion spring rod.

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