Lockable measuring device for physical education

Abstract

The invention discloses a lockable physical education measuring device, and relates to the technical field of teaching aids, the lockable physical education measuring device comprises a working frame, the bottom end of the working frame is provided with a movable moving bottom plate, the left side of the top end of the moving bottom plate is provided with a telescopic operating rod, and the periphery of the bottom end of the moving bottom plate is provided with brake universal wheels and a measuring mechanism; the measuring mechanism comprises a counter and a winding and unwinding roller, a working notch is formed in the right side of the top end of the working frame, the counter is installed at the upper end of an inner cavity of the working notch, and the winding and unwinding roller is installed at the lower end in the inner cavity of the working notch. By starting the measuring mechanism and starting the line snapping mechanism through the measuring mechanism, in the physical education teaching process, the device can be suitable for measurement of different terrains, measurement traces can be left after measurement, objectivity in the measurement process is improved, and accidents after measurement are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of teaching aids, and specifically relates to a lockable measuring device for physical education teaching. Background Art

[0002] Currently, during the process of physical education teaching, when conducting long jump, javelin, and shot put, it is necessary to measure the distance. Especially when measuring during an exam, in order to retain detailed and specific measurement data during the exam, it is necessary to leave a measurement mark. However, when the existing measuring devices are used for measurement, they can only simply measure, and separate operations are required to leave a mark. This not only has low operation efficiency but also affects the normal subsequent measurement processes and steps. Summary of the Invention

[0003] The purpose of the present invention is to provide a lockable measuring device for physical education teaching to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A lockable measuring device for physical education teaching, including a working frame, a movable moving bottom plate is installed at the bottom end of the working frame, a telescopic operating rod is installed on the left side of the top end of the moving bottom plate, and brake universal wheels are installed around the bottom end of the moving bottom plate;

[0005] A measuring mechanism, the measuring mechanism includes a counter and a winding and unwinding roller. A working slot is opened on the right side of the top end of the working frame. A counter is installed at the upper end of the inner cavity of the working slot, and a winding and unwinding roller is installed at the lower middle end of the inner cavity of the working slot;

[0006] A material storage mechanism, the material storage mechanism includes a material storage slot, the material storage slot is opened on the left side of the top end of the working frame, and a movable hole is opened at the bottom end of the inner cavity of the material storage slot;

[0007] A feeding mechanism, the feeding mechanism includes an annular slot and a working ring plate. The annular slot is opened at the top end of the movable hole, the working ring plate is movably installed inside the annular slot, and cleaning brush strips are installed around the inner side of the working ring plate.

[0008] Preferably, the measuring mechanism further includes a positioning insertion rod, a transmission gear, a tooth block, a rotating bevel gear, a transmission bevel gear, a rotating rod, and a measuring rope. The positioning insertion rod is movably installed in the middle of the right side of the moving bottom plate. The transmission gear is installed on the front side of the counter, and the rear side of the transmission gear is connected to the counter. A single-phase motor is installed at the relative position of the rewinding roller at the rear side of the inner cavity of the working slot opening, and the output shaft at the front end of the single-phase motor is provided with a rotating rod. The front end of the rotating rod passes through the middle of the rewinding roller and is connected to the front side of the inner cavity of the working slot opening. The measuring rope is wound around the outside of the rewinding roller. One end of the measuring rope away from the rewinding roller passes through the upper right end of the material storage slot opening and the inside of the movable hole and is connected to the positioning insertion rod. There is a gap between the front side of the rewinding roller and the front side of the inner cavity of the working slot opening.

[0009] Preferably, a cover plate is installed at the top of the working frame, and an observation plate is installed on the right side of the cover plate. A rotating bevel gear is installed on the front side of the rewinding roller. A transmission bevel gear is meshed and installed at the bottom of the rotating bevel gear. A rotating rod is installed at the bottom of the transmission bevel gear. A stabilizing shaft frame is installed in the middle of the rotating rod, and the periphery of the stabilizing shaft frame is connected to the periphery of the inner cavity of the working slot opening. The bottom end of the rotating rod is connected to the bottom end of the inner cavity of the working slot opening through a bearing. Laser irradiation heads are installed on the front side and the rear side of the bottom end of the moving bottom plate. A control panel is installed on the front side of the working frame. The laser irradiation heads and the single-phase motor are electrically connected to the control panel. A plurality of tooth blocks are equidistantly installed around the front end of the rewinding roller. The transmission gear and the tooth blocks are meshed with the tooth grooves formed between the tooth blocks. Pulley frames are installed at the upper right end of the inner cavity of the material storage slot opening and the upper left end of the inner cavity of the working slot opening. The measuring rope passes through the outside of the pulley frames.

[0010] Preferably, the material storage mechanism further includes a touch switch, a movable pressing plate, and a pushing spring. The touch switch is installed at the lower middle part on the left side of the inner cavity of the material storage slot opening. The bottom end of the inner cavity of the material storage slot opening is in a horn-shaped structure. A movable pressing plate is movably installed at the upper end of the inner cavity of the material storage slot opening. An activity opening is formed in the middle of the movable pressing plate. A pushing spring in a compressed state is installed on one side of the top end of the movable pressing plate. The bottom end of the pushing spring is connected to the top end of the movable pressing plate. Powder is added to the inside of the material storage slot opening. The touch switch is electrically connected to the control panel.

[0011] Preferably, the feeding mechanism further includes a movable rod, a rotating wheel, a transmission belt, a mounting ring groove, a rotating ring plate, an annular guide plate, a plug plate, a small electromagnetic block, a transmission wheel, an annular magnetic block and a mounting ring rail. The movable rods are installed around the top end of the working ring plate. The mounting ring grooves are formed at the bottom end of the inner cavity of the storage tank opening around the annular notch. The annular magnetic blocks are installed around the outer periphery of the working ring plate. The mounting ring rails are installed at the upper part around the outer periphery of the working ring plate. The movable ring strips are slidably installed inside the mounting ring rails, and one end of the movable ring strip away from the mounting ring rail is connected to the upper part around the inner cavity of the annular notch. A number of round beads are installed around the bottom end of the working ring plate. The plug plate is installed at the upper end of the inner cavity of the mounting ring groove, and the plug plate is circular in structure when viewed from above.

[0012] Preferably, the rotating ring plate is movably installed inside the mounting ring groove. A number of small electromagnetic blocks are installed at equal intervals around the outer periphery of the rotating ring plate. The annular guide plate is installed around the inner periphery of the rotating ring plate cavity. The transmission wheel is installed at the bottom end of the rotating ring plate. The rotating wheel is installed at the bottom end of the rotating rod. The transmission belt is sleeved outside the transmission wheel. The movable through opening is formed at the bottom right end of the inner cavity of the mounting ring groove. One end of the transmission belt away from the transmission wheel passes through the movable through opening and is sleeved and connected to the outside of the rotating wheel. A number of ball bearings are installed around the bottom end of the rotating ring plate.

[0013] Preferably, the mounting ring strips are installed around the top end of the rotating ring plate. A number of limit docking blocks are installed at equal intervals at the top end of the mounting ring strips. The top end of the limit docking block is conical in structure. The stable ring rails are installed around the bottom end of the plug plate. The stable ring strips are slidably installed inside the stable ring rails. The limit docking openings are formed at the relative positions of the limit docking blocks around the bottom end of the stable ring strip. The top end of the inner cavity of the limit docking opening is conical in structure.

[0014] Preferably, the device further includes an elastic cord mechanism, which includes a guiding roller, a fixed shaft frame, a pulling spring, a pulling rod, a pulling cord, a guiding wheel, a movable mounting rod, a limit block, a limit electromagnetic block, a connecting magnetic block and a mounting notch. The fixed shaft frame is installed at one side of the bottom end of the moving bottom plate. The return hinge is installed at the bottom end of the fixed shaft frame, and the guiding roller is installed at the front side of the return hinge through a bearing. The guiding roller is funnel-shaped, and the pulling rod is installed at the rear side of the return hinge. The pulling cord is installed at the rear side of the pulling rod. The movable through hole is formed in the inner cavity of the moving bottom plate. The mounting notch is formed at the left side of the bottom end of the moving bottom plate. The limit block is movably installed at the upper end of the inner cavity of the mounting notch. The movable mounting rod is installed at one side of the bottom end of the limit block. The guiding wheel is installed at the bottom end of the movable mounting rod. The measuring cord passes through the outside of the guiding wheel and the upper end of the guiding roller. The pulling spring in a stretched state is installed at the right side of the bottom end of the limit block. The limit electromagnetic block is installed at the top end of the limit block. The connecting magnetic block is installed at the upper end of the inner cavity of the mounting notch.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. By starting the measuring mechanism and then starting the stringing mechanism through the measuring mechanism, during the process of physical education teaching, it can not only be applicable to different terrains for measurement, but also leave a measurement mark after measurement, increasing the objectivity during the measurement process, avoiding accidental situations after measurement that may cause the loss of measurement data and the need for re-measurement, which takes up the time of later teaching. Moreover, when stringing and measuring, pressure is generated by the elastic force to detect the line body itself. If there is an abnormality in the line body, when the pressure during stringing is too large, the line body will break. When the line body breakage is found, it needs to be replaced in time. By detecting the line body during the stringing measurement process, the stability during later measurement is ensured;

[0017] 2. The present invention also starts the feeding mechanism through the measuring mechanism, increasing the adhesion when the measuring rope contacts the powder, avoiding the situation where too little powder adheres to the outside of the measuring rope during use, resulting in the failure of successful stringing later. And through the rotation of the cleaning brush strip, the downward movement of the powder can be blocked, preventing the powder from also moving downward when the measuring rope moves downward, resulting in waste of powder scattered outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0019] Figure 2 It is a structural diagram of the overall horizontal provided by an embodiment of the present invention;

[0020] Figure 3 It is a structural diagram of the bottom end cross-section of the material storage tank opening provided by an embodiment of the present invention;

[0021] Figure 4 It is a side view structural diagram of the guide roller provided by an embodiment of the present invention;

[0022] Figure 5 It is provided by an embodiment of the present invention Figure 2 The enlarged structural diagram at A in;

[0023] Figure 6 It is provided by an embodiment of the present invention Figure 3 The enlarged structural diagram at B in.

[0024] In the figure: 1, working frame; 2, moving bottom plate; 3, measuring mechanism; 301, positioning insertion rod; 302, counter; 303, transmission gear; 304, winding and unwinding roller; 305, tooth block; 306, rotating bevel gear; 307, transmission bevel gear; 308, rotating rod; 309, measuring rope; 4, storage mechanism; 401, storage slot opening; 402, touch switch; 403, movable pressing plate; 404, pushing spring; 5, feeding mechanism; 501, movable rod; 502, rotating wheel; 503, transmission belt; 504, mounting ring groove; 505, rotating ring plate; 506, annular guide plate; 507, annular slot opening; 508, working ring plate; 509, blocking plate; 510, small electromagnetic block; 511, transmission wheel; 512, annular magnetic block; 513, mounting ring rail; 6, wire snapping mechanism; 601, guide roller; 602, fixed shaft frame; 603, pulling spring; 604, pulling rod; 605, pulling rope; 606, guide wheel; 607, movable mounting rod; 608, limiting block; 609, limiting electromagnetic block; 610, connecting magnetic block; 611, mounting slot opening; 7, telescopic operating rod; 8, laser irradiation head; 9, observation plate; 10, working slot opening; 11, stable ring rail; 12, stable ring strip; 13, limiting docking port; 14, mounting ring strip; 15, limiting docking block. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-6 , the present invention provides a technical solution: a lockable measuring device for physical education teaching, including a working frame 1, a movable moving bottom plate 2 is installed at the bottom end of the working frame 1, a telescopic operating rod 7 is installed on the left side of the top end of the moving bottom plate 2, and brake universal wheels are installed around the bottom end of the moving bottom plate 2;

[0027] A measuring mechanism 3, the measuring mechanism 3 includes a counter 302 and a winding and unwinding roller 304. A working slot opening 10 is opened on the right side of the top end of the working frame 1. A counter 302 is installed at the upper end of the inner cavity of the working slot opening 10, and a winding and unwinding roller 304 is installed at the lower middle of the inner cavity of the working slot opening 10;

[0028] A storage mechanism 4, the storage mechanism 4 includes a storage slot opening 401, the storage slot opening 401 is opened on the left side of the top end of the working frame 1, and a movable hole is opened at the bottom end of the inner cavity of the storage slot opening 401;

[0029] The feeding mechanism 5, the feeding mechanism 5 includes an annular notch 507 and a working ring plate 508. The annular notch 507 is opened at the top end of the movable hole. A working ring plate 508 is movably installed inside the annular notch 507. Cleaning brush strips are installed around the inner side of the working ring plate 508.

[0030] The measuring mechanism 3 further includes a positioning plug 301, a transmission gear 303, a tooth block 305, a rotating bevel gear 306, a transmission bevel gear 307, a rotating rod 308 and a measuring rope 309. A positioning plug 301 is movably installed in the middle of the right side of the moving bottom plate 2. A transmission gear 303 is installed on the front side of the counter 302. The rear side of the transmission gear 303 is connected to the counter 302. A single-phase motor is installed at the relative position of the take-up and pay-off roller 304 at the rear side of the inner cavity of the working notch 10. The output shaft at the front end of the single-phase motor is provided with a rotating rod, and the front end of the rotating rod passes through the middle of the take-up and pay-off roller 304 and is connected to the front side of the inner cavity of the working notch 10. A measuring rope 309 is wound around the outside of the take-up and pay-off roller 304. One end of the measuring rope 309 away from the take-up and pay-off roller 304 passes through the upper right end of the storage notch 401 and the inside of the movable hole and is connected to the positioning plug 301. There is a gap between the front side of the take-up and pay-off roller 304 and the front side of the inner cavity of the working notch 10.

[0031] A cover plate is installed at the top end of the working frame 1, and an observation plate 9 is installed on the right side of the cover plate. A rotating bevel gear 306 is installed on the front side of the take-up and pay-off roller 304. A transmission bevel gear 307 is installed at the meshing position at the bottom end of the rotating bevel gear 306. A rotating rod 308 is installed at the bottom end of the transmission bevel gear 307. A stabilizing shaft frame is installed in the middle of the rotating rod 308, and the periphery of the stabilizing shaft frame is connected to the periphery of the inner cavity of the working notch 10. The bottom end of the rotating rod 308 is connected to the bottom end of the inner cavity of the working notch 10 through a bearing. Laser irradiation heads 8 are installed on the front side and the rear side of the bottom end of the moving bottom plate 2. A control panel is installed on the front side of the working frame 1. The laser irradiation heads 8 and the single-phase motor are electrically connected to the control panel. A number of tooth blocks 305 are equidistantly installed around the front end of the take-up and pay-off roller 304. The transmission gear 303 and the tooth blocks 305 are meshed with the tooth grooves formed between the tooth blocks 305. Pulley frames are installed at the upper right end of the inner cavity of the storage notch 401 and the upper left end of the inner cavity of the working notch 10. The measuring rope 309 passes through the outside of the pulley frames.

[0032] The specific implementation method is as follows: During the process of physical education teaching, when measuring the distance of a sports event, insert the positioning insertion rod 301 into the origin, drive the moving bottom plate 2 and the working frame 1 to move through the telescopic operating rod 7. During the moving process, start the single-phase motor to drive the rotating rod to rotate, drive the winding and unwinding roller 304 to rotate through the rotating rod. When the winding and unwinding roller 304 rotates, the measuring rope 309 is in a slack state. When the measuring rope 309 moves, it passes through the inside of the material storage tank opening 401, and the outside of the measuring rope 309 is stained with powder. When the winding and unwinding roller 304 rotates, it drives the rotating bevel gear 306 to rotate. Through the mutual meshing of the rotating bevel gear 306 and the transmission bevel gear 307, drive the transmission bevel gear 307 to rotate, then drive the rotating rod 308 to rotate. When the winding and unwinding roller 304 rotates, drive the surrounding tooth blocks 305 to rotate, drive the transmission gear 303 to rotate through meshing with the transmission gear 303, and start the counter 302 to count regularly. When the measuring rope 309 moves to the set distance each time, it will trigger the timing counter 302. By multiplying the number displayed by the counter 302 by the set distance, the specific distance can be judged.

[0033] The material storage mechanism 4 further includes a touch switch 402, a movable pressing plate 403 and a pushing spring 404. The touch switch 402 is installed at the lower middle part on the left side of the inner cavity of the material storage tank opening 401. The bottom end of the inner cavity of the material storage tank opening 401 is in a horn-shaped structure. The movable pressing plate 403 is movably installed at the upper end of the inner cavity of the material storage tank opening 401. An activity opening is provided in the middle of the movable pressing plate 403. One side of the top end of the movable pressing plate 403 is provided with a pushing spring 404 in a compressed state. The bottom end of the pushing spring 404 is connected to the top end of the movable pressing plate 403. Powder is added inside the material storage tank opening 401. The touch switch 402 is electrically connected to the control panel;

[0034] The specific implementation method is as follows: When measuring and paying out the line, place the powder for paying out the line into the inside of the material storage tank opening 401. Push the movable pressing plate 403 to move downward through the pushing spring 404 in a compressed state, then push the movable pressing plate 403 to move downward. When the powder is gradually used up, the movable pressing plate 403 will contact the touch switch 402, trigger the touch switch 402 to start the control panel, and tell the staff that the powder is almost used up and needs to be added in time.

[0035] The feeding mechanism 5 also includes a movable rod 501, a rotating wheel 502, a transmission belt 503, a mounting ring groove 504, a rotating ring plate 505, an annular guide plate 506, a blocking plate 509, a small electromagnetic block 510, a transmission wheel 511, an annular magnetic block 512 and a mounting ring rail 513. The movable rod 501 is installed around the top of the working ring plate 508, and the bottom of the inner cavity of the material storage slot 401 is located around the annular slot 507 and has a mounting ring groove 504. The outer periphery of the working ring plate 508 is provided with a plurality of An annular magnetic block 512 is installed, and an installation ring rail 513 is installed on the upper end of the outer periphery of the working ring plate 508. A movable ring bar is slidably installed inside the installation ring rail 513, and the end of the movable ring bar away from the installation ring rail 513 is connected to the upper end of the inner cavity of the annular groove 507. A plurality of round beads are installed around the bottom end of the working ring plate 508, and a blocking plate 509 is installed on the upper end of the inner cavity of the mounting ring groove 504. The blocking plate 509 has a circular structure when viewed from above, and a small electromagnetic block 510 is electrically connected to the control panel;

[0036] The rotating ring plate 505 is movably installed in the inner cavity of the mounting ring groove 504, and a plurality of small electromagnetic blocks 510 are equidistantly installed around the outer periphery of the rotating ring plate 505. An annular guide plate 506 is installed around the inner cavity of the rotating ring plate 505. A transmission wheel 511 is installed at the outer bottom end of the rotating ring plate 505, and a rotating wheel 502 is installed at the bottom end of the rotating rod 308. A transmission belt 503 is sleeved and installed on the outer side of the transmission wheel 511. A movable opening is opened at the right bottom end of the inner cavity of the mounting ring groove 504, and one end of the transmission belt 503 away from the transmission wheel 511 passes through the movable opening and is sleeved and connected with the outer side of the rotating wheel 502. A plurality of ball bearings are installed around the bottom end of the rotating ring plate 505.

[0037] The specific implementation method is as follows: when the rotating rod 308 rotates, the rotating wheel 502 is driven to rotate, and the transmission wheel 511 is driven to rotate through the transmission belt 503. When the transmission wheel 511 rotates, the rotating ring plate 505 is driven to rotate inside the mounting ring groove 504, and the small electromagnetic block 510 is started before the rotation, so that the annular guide plate 506 generates magnetism and generates magnetic attraction with the annular magnetic block 512. When the rotating ring plate 505 rotates, the annular magnetic block 512 and the working ring plate 508 are driven to rotate inside the annular notch 507. When the working ring plate 508 rotates, the movable ring bar is driven to rotate inside the mounting ring rail 513. The working ring plate 508 is increased. Stability and flexibility during rotation. When the working ring plate 508 rotates, it drives the cleaning brush bar to rotate. When the cleaning brush bar rotates, it contacts and rubs with the outside of the measuring rope 309. When the cleaning brush bar rotates, it can squeeze and rub the powder to the outside of the measuring rope 309, thereby increasing the adhesion of the measuring rope 309 when in contact with the powder, thereby avoiding the situation where there is too little powder attached to the outside when using the measuring rope 309, resulting in failure in the subsequent line drawing. In addition, through the rotation of the cleaning brush bar, the powder moving downward can be blocked, thereby avoiding the situation where the powder moves downward when the measuring rope 309 moves downward, resulting in the powder scattering to the outside and causing waste.

[0038] At the periphery of the top end of the rotating ring plate 505, an installation ring bar 14 is installed. At equal intervals at the top end of the installation ring bar 14, a number of limit docking blocks 15 are installed. The top end of the limit docking block 15 is of a conical structure. At the periphery of the bottom end of the plug plate 509, a stable ring rail 11 is installed. Inside the stable ring rail 11, a stable ring bar 12 is slidably installed. At the relative positions of the limit docking blocks 15 at the periphery of the bottom end of the stable ring bar 12, limit docking ports 13 are opened. The top end inside the limit docking port 13 is of a conical structure;

[0039] The specific implementation method is as follows: When the plug plate 509 is installed at the upper end of the inner cavity of the installation ring groove 504, first rotate the stable ring bar 12 to rotate inside the stable ring rail 11, and adjust the position of the limit docking port 13 to directly above the limit docking block 15. When the plug plate 509 is installed at the upper end of the inner cavity of the installation ring groove 504, the limit docking port 13 will be sleeved inside the limit docking block 15. When the rotating ring plate 505 rotates, through the fitting and docking of the limit docking block 15 and the limit docking port 13, the stable ring bar 12 is driven to slide inside the stable ring rail 11, increasing the stability and flexibility of the rotating ring plate 505 during the rotation process.

[0040] The device further includes a wire-slinging mechanism 6. The wire-slinging mechanism 6 includes a guiding roller 601, a fixed shaft frame 602, a pulling spring 603, a pulling rod 604, a pulling rope 605, a guiding wheel 606, a movable mounting rod 607, a limit block 608, a limit electromagnet 609, a connecting magnet 610, and an installation notch 611. At one side of the bottom end of the moving bottom plate 2, a fixed shaft frame 602 is installed. At the bottom end of the fixed shaft frame 602, a return hinge is installed, and a guiding roller 601 is installed at the front side of the return hinge through a bearing. The guiding roller 601 is of a funnel-shaped structure, and a pulling rod 604 is installed at the rear side of the return hinge. A pulling rope 605 is installed at the rear side of the pulling rod 604. An activity through hole is opened in the inner cavity of the moving bottom plate 2. An installation notch 611 is opened at the left side of the bottom end of the moving bottom plate 2. A limit block 608 is movably installed at the upper end inside the installation notch 611. At one side of the bottom end of the limit block 608, a movable mounting rod 607 is installed. A guiding wheel 606 is installed at the bottom end of the movable mounting rod 607. The measuring rope 309 passes through the outside of the guiding wheel 606 and the upper end of the guiding roller 601. A pulling spring 603 in a stretched state is installed at the right side of the bottom end of the limit block 608. A limit electromagnet 609 is installed at the top end of the limit block 608. A connecting magnet 610 is installed at the upper end inside the installation notch 611, and the limit electromagnet 609 is electrically connected to the control panel;

[0041] The specific implementation method is as follows: when the line is released and the line is stretched, the power supply of the limit electromagnetic block 609 is disconnected through the control panel, so that the limit electromagnetic block 609 loses its magnetism, and the limit block 608 loses its restraining force, and the limit block 608 and the movable mounting rod 607 are driven downward by the pulling spring 603 in a stretched state, and the guide wheel 606 is driven downward, which will straighten and tighten the measuring rope 309. When the limit block 608 moves downward, it drives the pulling rope 605 to move, and the rear side of the pulling rod 604 is driven upward with the rebound hinge as the axis, and the front end of the guide roller 601 is driven downward. When the angle of the guide roller 601 after moving is too large, the measuring rope 309 loses its restraining force, making the measuring rope 309 09 Move downward quickly, expand the measuring rope 309 with powder attached to it with the ground, and leave a mark on the ground. In the process of physical education teaching, it can be used for measurement in different terrains, and can also leave a mark of measurement after measurement, thereby increasing the objectivity of the measurement process and avoiding accidents after measurement. The data during measurement is lost, and it is necessary to measure again, which takes up time for later teaching. In addition, it can also generate pressure through elastic force during line measurement to detect the line itself. If there is an abnormality in the line, when the pressure during line measurement is too large, the line will break. When the line is found to be broken, it needs to be replaced in time. By detecting the line during line measurement, the stability of later measurement is guaranteed.

[0042] Working principle: During the physical education teaching process, when measuring the distance of the sports event, the present invention inserts the positioning rod 301 to the origin, drives the movable base plate 2 and the working frame 1 to move through the telescopic operating rod 7, and starts the single-phase motor to drive the rotating rod to rotate during the movement, and drives the retractable roller 304 to rotate through the rotating rod. When the retractable roller 304 rotates, the measuring rope 309 is relaxed. When the measuring rope 309 moves, it passes through the inside of the material storage slot 401, so that the outside of the measuring rope 309 is stained with powder. When the retractable roller 304 rotates, it drives the rotating bevel gear 306 rotates, and the bevel gear 306 and the transmission bevel gear 307 are meshed with each other, driving the transmission bevel gear 307 to rotate, which drives the rotating rod 308 to rotate. When the retracting roller 304 rotates, it drives the tooth blocks 305 around to rotate, and drives the transmission gear 303 to rotate through meshing with the transmission gear 303, and starts the counter 302 to count regularly. Every time the measuring rope 309 moves to a set distance, it will trigger the timing counter 302. By multiplying the number displayed by the counter 302 by the set distance, the specific distance can be determined.

[0043] When performing the line marking operation after the wire laying is completed, disconnect the power supply of the limit electromagnetic block 609 through the control panel, so that the limit electromagnetic block 609 loses magnetism, and then the limit block 608 will lose its restraint force. Driven by the tensioned pulling spring 603, the limit block 608 and the movable mounting rod 607 move downward, and drive the guide wheel 606 downward, then the measuring rope 309 will be straightened and tightened. When the limit block 608 moves downward, it drives the pulling rope 605 to move, then drives the rear side of the pulling rod 604 to move upward around the rebound hinge, and drives the front end of the guide roller 601 to move downward. When the angle of the guide roller 601 after moving is too large, the measuring rope 309 will lose its restraint force, and the measuring rope 309 will quickly move downward, expanding the measuring rope 309 with powder attached to the ground, leaving a mark on the ground.

[0044] When the rotating rod 308 rotates, it drives the rotating wheel 502 to rotate, and drives the driving wheel 511 to rotate through the transmission belt 503. When the driving wheel 511 rotates, it drives the rotating ring plate 505 to rotate inside the mounting ring groove 504, and starts the small electromagnetic block 510 before rotation, so that the annular guide plate 506 generates magnetism and generates magnetic attraction with the annular magnet 512. When the rotating ring plate 505 rotates, it drives the annular magnet 512 and the working ring plate 508 to rotate inside the annular notch 507. When the working ring plate 508 rotates, it drives the movable ring strip to rotate inside the mounting ring rail 513, increasing the stability and flexibility of the working ring plate 508 during rotation. When the working ring plate 508 rotates, it drives the cleaning brush strip to rotate. When the cleaning brush strip rotates, it contacts and rubs against the outside of the measuring rope 309. When the cleaning brush strip rotates, it can squeeze and rub the powder onto the outside of the measuring rope 309, increasing the adhesion when the measuring rope 309 contacts the powder, and avoiding the situation that when using the measuring rope 309, there is too little powder attached to the outside, resulting in the failure of line marking in the later stage.

[0045] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lockable measuring device for physical education teaching, comprising a working frame (1), a movable bottom plate (2) being mounted at the bottom of the working frame (1), a telescopic operating rod (7) being mounted on the left side of the top of the movable bottom plate (2), characterized in that: A measuring mechanism (3), the measuring mechanism (3) comprising a counter (302) and a retractable roller (304); a working slot (10) is provided on the right side of the top of the working frame (1); a counter (302) is installed at the upper end of the inner cavity of the working slot (10); and a retractable roller (304) is installed at the middle and lower end of the inner cavity of the working slot (10); A material storage mechanism (4), the material storage mechanism (4) comprising a material storage slot (401), the material storage slot (401) being arranged on the left side of the top end of the working frame (1), and a movable hole being arranged at the bottom end of the inner cavity of the material storage slot (401); A feeding mechanism (5), the feeding mechanism (5) comprising an annular notch (507) and a working ring plate (508), the annular notch (507) being arranged at the top of the movable hole, the working ring plate (508) being movably installed inside the annular notch (507), and cleaning brush strips being installed around the inner side of the working ring plate (508).

2. A lockable measuring device for physical education teaching according to claim 1, characterized in that: The measuring mechanism (3) further comprises a positioning rod (301), a transmission gear (303), a tooth block (305), a rotating bevel gear (306), a transmission bevel gear (307), a rotating rod (308) and a measuring rope (309); the positioning rod (301) is movably mounted in the middle of the right side of the movable base plate (2); the transmission gear (303) is mounted on the front side of the counter (302); the rear side of the transmission gear (303) is connected to the counter (302); the rear side of the inner cavity of the working notch (10) is located at the retractable roller ( A single-phase motor is installed at a relative position of the retractable roller (304), and a rotating rod is installed on the output shaft at the front end of the single-phase motor, and the front end of the rotating rod passes through the middle of the retractable roller (304) and is connected to the front side of the inner cavity of the working slot (10), a measuring rope (309) is wound around the outside of the retractable roller (304), and the end of the measuring rope (309) away from the retractable roller (304) passes through the upper right end of the material storage slot (401) and the inside of the movable hole and is connected to the positioning rod (301), and there is a gap between the front side of the retractable roller (304) and the front side of the inner cavity of the working slot (10).

3. A lockable measuring device for physical education teaching according to claim 2, characterized in that: A cover plate is installed at the top of the working frame (1), and an observation plate (9) is installed on the right side of the cover plate. A rotating bevel gear (306) is installed on the front side of the retractable roller (304). A transmission bevel gear (307) is meshed and installed at the bottom end of the rotating bevel gear (306). A rotating rod (308) is installed at the bottom end of the transmission bevel gear (307). A stabilizing shaft frame is installed in the middle of the rotating rod (308), and the stabilizing shaft frame is connected to the inner cavity of the working slot (10) around the periphery. The bottom end of the rotating rod (308) is connected to the bottom end of the inner cavity of the working slot (10) through a bearing. Laser irradiation heads (8) are installed on the front and rear sides of the bottom end of the base plate (2), a control panel is installed on the front side of the working frame (1), the laser irradiation head (8) and the single-phase motor are electrically connected to the control panel, a plurality of tooth blocks (305) are installed at equal intervals around the front end of the retractable roller (304), the transmission gear (303) and the tooth blocks (305) are meshed with the tooth grooves formed between the tooth blocks (305), a pulley frame is installed on the upper right end of the inner cavity of the material storage slot (401) and the upper left end of the inner cavity of the working slot (10), and the measuring rope (309) passes through the outside of the pulley frame.

4. A lockable measuring device for physical education teaching according to claim 3, characterized in that: The material storage mechanism (4) further comprises a touch switch (402), a movable pressure plate (403) and a push spring (404); the touch switch (402) is mounted at the middle and lower end of the left side of the inner cavity of the material storage slot (401); the bottom end of the inner cavity of the material storage slot (401) is a trumpet-shaped structure; a movable pressure plate (403) is movably mounted at the upper end of the inner cavity of the material storage slot (401); a movable opening is opened in the middle of the movable pressure plate (403); a push spring (404) in a compressed state is mounted on one side of the top end of the movable pressure plate (403); the bottom end of the push spring (404) is connected to the top end of the movable pressure plate (403); powder is added inside the material storage slot (401); and the touch switch (402) is electrically connected to the control panel.

5. A lockable measuring device for physical education teaching according to claim 1, characterized in that: The feeding mechanism (5) further comprises a movable rod (501), a rotating wheel (502), a transmission belt (503), a mounting annular groove (504), a rotating annular plate (505), an annular guide plate (506), a blocking plate (509), a small electromagnetic block (510), a transmission wheel (511), an annular magnetic block (512) and an mounting annular rail (513); the movable rod (501) is mounted around the top of the working annular plate (508); the bottom end of the inner cavity of the material storage slot (401) is provided with an mounting annular groove (504) around the annular slot (507). , an annular magnetic block (512) is installed around the outside of the working ring plate (508), a mounting ring rail (513) is installed around the upper end of the outside of the working ring plate (508), a movable ring bar is slidably installed inside the mounting ring rail (513), and the end of the movable ring bar away from the mounting ring rail (513) is connected to the upper end of the inner cavity of the annular groove (507), a plurality of round beads are installed around the bottom end of the working ring plate (508), and a blocking plate (509) is installed at the upper end of the inner cavity of the mounting ring groove (504), and the blocking plate (509) has a circular structure when viewed from above.

6. A lockable measuring device for physical education teaching according to claim 5, characterized in that: The rotating ring plate (505) is movably mounted in the inner cavity of the mounting ring groove (504); a plurality of small electromagnetic blocks (510) are equidistantly mounted around the outer periphery of the rotating ring plate (505); an annular guide plate (506) is mounted around the inner cavity of the rotating ring plate (505); a transmission wheel (511) is mounted on the outer bottom end of the rotating ring plate (505); a rotating wheel (502) is mounted on the bottom end of the rotating rod (308); a transmission belt (503) is sleevedly mounted on the outer side of the transmission wheel (511); a movable opening is opened at the right bottom end of the inner cavity of the mounting ring groove (504); one end of the transmission belt (503) away from the transmission wheel (511) passes through the movable opening and is sleevedly connected to the outer side of the rotating wheel (502); and a plurality of ball bearings are mounted around the bottom end of the rotating ring plate (505).

7. A lockable measuring device for physical education teaching according to claim 6, characterized in that: The top of the rotating ring plate (505) is equipped with a mounting ring strip (14) around the periphery, and a plurality of limit docking blocks (15) are equidistantly installed on the top of the mounting ring strip (14), and the top of the limit docking block (15) is in a conical structure. The bottom of the blocking plate (509) is equipped with a stabilizing ring rail (11) around the periphery, and a stabilizing ring strip (12) is slidably installed inside the stabilizing ring rail (11). A limit docking interface (13) is provided around the bottom of the stabilizing ring strip (12) at a position relative to the limit docking block (15), and the top of the inner cavity of the limit docking interface (13) is in a conical structure.

8. A lockable measuring device for physical education teaching according to claim 1, characterized in that: The device also includes a spring line mechanism (6), which includes a guide roller (601), a fixed shaft frame (602), a pulling spring (603), a pulling rod (604), a pulling rope (605), a guide wheel (606), a movable mounting rod (607), a limit block (608), a limit electromagnetic block (609), a connecting magnetic block (610) and a mounting slot (611). A fixed shaft frame (602) is installed on one side of the bottom end of the movable bottom plate (2), a rebound hinge is installed at the bottom end of the fixed shaft frame (602), and a guide roller (601) is installed on the front side of the rebound hinge through a bearing, the guide roller (601) is funnel-shaped, and a pulling rod (604) is installed on the rear side of the rebound hinge, and a pulling rod (604) is installed on the rear side of the pulling rod (604). The movable bottom plate (2) is provided with a movable through hole in its inner cavity, a mounting slot (611) is provided on the left side of the bottom end of the movable bottom plate (2), a limit block (608) is movably mounted on the upper end of the inner cavity of the mounting slot (611), a movable mounting rod (607) is mounted on one side of the bottom end of the limit block (608), a guide wheel (606) is mounted on the bottom end of the movable mounting rod (607), the measuring rope (309) passes through the outside of the guide wheel (606) and the upper end of the guide roller (601), a pulling spring (603) in a stretched state is mounted on the right side of the bottom end of the limit block (608), a limit electromagnetic block (609) is mounted on the top end of the limit block (608), and a connecting magnetic block (610) is mounted on the upper end of the inner cavity of the mounting slot (611).

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