Multi-person synchronous campus football lap training marker

Abstract

The application discloses a kind of many synchronous campus football return run training identification devices, it is related to sports training equipment technical field, including support, support includes two symmetrical support poles and the crossbar being set between the top of two support poles;The application is installed in the same crossbar by setting support, ensures the accurate alignment of each racetrack identification position, a support can complete the identification arrangement of multiple racetracks, without setting support structure for each racetrack separately, by the sliding cooperation of slide bar and T-shaped slot, each identification body can freely slide along the length direction of crossbar and be locked in any position by locking member, so that the number and spacing of identification body can be flexibly adjusted according to the number of students participating in training and racetrack width, adapt to different scale teaching scene, each identification body independently sets sensor and display screen, realize the real-time acquisition and feedback of many synchronous training data, effectively reduce the training management burden of teacher.

Description

Technical Field

[0001] This invention relates to the field of sports training equipment technology, specifically to a multi-person synchronous campus football shuttle run training marking device. Background Technology

[0002] Shuttle runs are a crucial basic physical training exercise in school football training, widely used in daily classroom teaching and after-school training. They primarily develop students' lower limb explosive power, speed endurance, and agility in changing direction. Football matches require players to frequently perform sudden stops, turns, and sprints back and forth; shuttle run training simulates these characteristics of the sport, improving students' ability to control their bodies during continuous movement. During shuttle run training, corresponding markers are placed on the field as clearly visible reference points for students. The number of shuttle runs and the total time taken are also recorded to visually reflect training effectiveness, allowing teachers to monitor each student's physical condition and adjust training intensity accordingly.

[0003] In school football shuttle run training, traditional marking devices mostly use a single independent marker pole arrangement, with each lane having its own independent marker pole. The lack of overall structural connection between the marker poles makes it difficult to ensure the neatness and consistency of the spacing between the marker poles on each lane. At the same time, each marker pole requires an independent base and power supply system, resulting in a repetitive structure, high cost, and large space occupation. In addition, the main body of the existing devices is mostly a fixed structure or integrally formed with the bracket. Once installed, it is difficult to flexibly adjust the number of main bodies according to the actual number of students participating in the training. When the number of students changes and it is necessary to add or remove main bodies, the operation is cumbersome and may even require disassembling and reassembling the entire device, resulting in poor adaptability. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-person synchronous campus football shuttle run training marking device to solve the problems of loose structure, inconvenient adjustment, and poor adaptability of existing marking devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-person synchronous campus football shuttle run training marking device, including a support frame, the support frame including two symmetrically arranged support rods and a crossbar disposed between the tops of the two support rods, support rods symmetrically arranged on the outer sides of the two support rods, and also including multiple marking bodies, each marking body being provided with a connecting component between it and the crossbar;

[0006] The connecting component includes a T-shaped groove opened along the length of the horizontal bar and a slide rod slidably connected in the T-shaped groove. The main body of the sign is connected to the bottom of the slide rod. The connecting component also includes a locking member for locking the slide rod in any position in the T-shaped groove.

[0007] A display screen is provided on the side of the sign body, and a sensor is provided on the bottom of the sign body.

[0008] Furthermore, both support rods have hollow cavities inside, which are used to place counterweights.

[0009] Furthermore, the locking component includes a slot formed at the bottom of the T-shaped groove, a locking plate is fixedly connected to the top of the slide rod, and an elastic element is fixedly connected to the top surface of the locking plate.

[0010] Furthermore, the card slots are provided in multiple ways and are evenly spaced along the length of the T-shaped slots, and the card plate is engaged in the corresponding card slot.

[0011] Furthermore, the length direction of the card plate is consistent with the length direction of the T-slot, and the elastic element is a compression spring.

[0012] Furthermore, a disassembly assembly is provided between the slide bar and the sign body, the disassembly assembly being used to achieve a detachable connection between the sign body and the slide bar.

[0013] Furthermore, the assembly / disassembly assembly includes a socket at the bottom of the slide bar and a plug fixedly connected to the top of the sign body;

[0014] The slide rod is externally threaded with a drive ring, and two connecting seats are symmetrically fixedly connected to the drive ring. Each of the two connecting seats is rotatably connected with a clamping plate. Both clamping plates are provided with guide grooves, which are formed by connecting straight groove sections and inclined groove sections.

[0015] The bottom of the slide bar is symmetrically fixedly connected to two fixed seats, and each of the two fixed seats is fixedly connected to a fixed shaft. The two fixed shafts are respectively inserted into the guide grooves of the two clamping plates.

[0016] Furthermore, the insertion rod is provided with a connecting plate, and the bottom of the connecting plate is provided with an annular groove, and the ends of the two clamping plates are engaged in the annular groove.

[0017] Furthermore, the connecting plate is located in the middle of the insertion rod, the annular groove is an annular groove formed around the axis of the insertion rod, and the end of the clamping plate is provided with a claw that matches the annular groove.

[0018] Furthermore, the top end of the insertion rod passes through the connecting plate and is inserted into the insertion hole.

[0019] Compared with the prior art, the present invention provides a multi-person synchronous campus football shuttle run training marking device. By setting up an integrated bracket spanning multiple running tracks, multiple marking bodies are uniformly installed on the same horizontal bar. Each marking body is arranged in a straight line along the horizontal bar, which ensures the precise alignment and neat arrangement of the marking positions of each track. The overall structure is compact and occupies little space. Moreover, one bracket can complete the marking layout of multiple running tracks, eliminating the need to set up a separate support structure for each track, which greatly reduces material costs and layout time.

[0020] Through the sliding engagement of the slide bar and the T-slot in the connecting component, each sign body can slide freely along the length of the horizontal bar and be locked in any position by the locking component, so that the number and spacing of the sign bodies can be flexibly adjusted according to the number of students participating in the training and the width of the track, adapting to teaching scenarios of different scales.

[0021] The support rod has a hollow cavity inside to hold the counterweight, which, together with the outer support rod, forms a triangular support structure, which significantly improves the overall stability and anti-overturning ability of the support.

[0022] Each sign is independently equipped with a sensor and display screen, which can automatically sense the arrival of students and simultaneously display the number of times they turn back and the time taken. This enables real-time collection and feedback of training data for multiple people simultaneously, effectively reducing the training management burden on teachers. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0025] Figure 2 A top view provided for an embodiment of the present invention;

[0026] Figure 3 for Figure 2 Cross-sectional view at point AA;

[0027] Figure 4 for Figure 2 Cross-sectional view at point BB;

[0028] Figure 5 This is an exploded view of the structure of the connection component provided in an embodiment of the present invention;

[0029] Figure 6 for Figure 3 Enlarged structural diagram at point C;

[0030] Figure 7 This is an exploded view of the disassembly and assembly components provided in an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Bracket; 11. Support rod; 111. Hollow cavity; 12. Crossbar; 2. Support rod; 3. Connecting assembly; 31. T-slot; 32. Slide rod; 33. Locking component; 331. Slot; 332. Card plate; 333. Elastic element; 4. Identifier body; 5. Display screen; 6. Sensor; 7. Assembly / disassembly assembly; 71. Socket; 72. Insert rod; 73. Drive ring; 74. Connecting seat; 75. Clamping plate; 76. Guide groove; 77. Fixing seat; 78. Fixing shaft; 79. Connecting plate; 791. Annular groove. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] As attached Figure 1 To be continued Figure 5 As shown:

[0035] Example 1:

[0036] This invention provides a multi-person synchronous campus football shuttle run training marking device, including a support 1. The support 1 includes two symmetrically arranged support rods 11 and a crossbar 12 disposed between the top ends of the two support rods 11. Support rods 2 are symmetrically arranged on the outer sides of the two support rods 11. It also includes multiple marking bodies 4, and each marking body 4 is connected to the crossbar 12 by a connecting component 3. The support 1 serves as the supporting skeleton of the entire device, spanning across the track, and is used to support and install all marking bodies 4 and related components, ensuring that each marking body 4 is arranged in a straight line in the width direction of the track. The support rods 11 are two symmetrically arranged vertical rods, located on both sides of the track, serving as the main vertical support components of the support 1. The crossbar 12 is erected above the track to bear the vertical load of the entire device. The crossbar 12 is erected between the top ends of the two support rods 11 and is horizontal along the width direction of the track. The extension serves as the mounting base for each sign body 4, providing a unified installation platform and support for the sign body 4. The support rods 2 are symmetrically arranged on the outside of the two support rods 11, with two rods on the outside of each support rod 11, extending outward in a figure-eight shape. The bottom end of the support rods 2 is supported on the ground to increase the contact area between the support rods 11 and the ground and the support span, thereby improving the overall anti-overturning stability of the bracket 1. The connecting component 3 is used to detachably install the sign body 4 on the crossbar 12 and realize the position adjustment of the sign body 4 along the length of the crossbar 12, so that each sign body 4 can adapt to the layout requirements of different track spacing. The sign body 4 consists of multiple independently set sign units, with each sign body 4 corresponding to one track, used to provide students with visual identification and position reference for turning points, and also serving as the mounting carrier for electronic components such as sensors 6 and displays 5.

[0037] The connecting component 3 includes a T-shaped groove 31 opened along the length of the horizontal bar 12 and a sliding rod 32 slidably connected in the T-shaped groove 31. The sign body 4 is connected to the bottom of the sliding rod 32. The connecting component 3 also includes a locking member 33 for locking the sliding rod 32 in any position in the T-shaped groove 31. The cross-section of the T-shaped groove 31 is T-shaped, which is used to accommodate the top of the sliding rod 32 and provide a track for the sliding rod 32 to slide. At the same time, it plays a limiting and guiding role for the sliding rod 32. The sliding rod 32 is a vertically set rod. Its top end is slidably embedded in the T-shaped groove 31 and can slide freely along the length of the T-shaped groove 31. Its bottom end extends out of the T-shaped groove 31 and is connected to the sign body 4. The sliding of the sliding rod 32 in the T-shaped groove 31 drives the sign body 4 to move along the length of the horizontal bar 12 to adjust its position. The locking member 33 is used to lock and fix the sliding rod 32 in any selected position in the T-shaped groove 31 to prevent the sliding rod 32 from sliding and shifting unexpectedly during use, and to ensure the stability of the position of the sign body 4.

[0038] A display screen 5 is installed on the side of the sign body 4, and a sensor 6 is installed on the bottom of the sign body 4. The display screen 5 is installed on the side of the sign body 4 to display the student's training data in real time, including the number of times to turn back, the time taken per turn, the total time taken, etc., so that students and teachers can intuitively view the training progress and results. The sensor 6 is installed on the bottom of the sign body 4. The sensor 6 is an infrared sensor 6 or an ultrasonic distance sensor 6, which is used to sense the student's approach or arrival. When the student arrives at the location of the sign body 4, the sensing signal is triggered as the trigger for timing and counting.

[0039] Both support rods 11 have hollow cavities 111 inside, forming a space for placing counterweights such as sandbags, metal blocks or water bags, to increase the overall weight and stability of the support rods 11 and prevent the device from tipping over due to wind or external impact when used outdoors.

[0040] The locking component 33 includes a slot 331 formed at the bottom of the T-shaped groove 31. A locking plate 332 is fixedly connected to the top of the slide rod 32. An elastic element 333 is fixedly connected to the top surface of the locking plate 332. The locking plate 332 engages with the corresponding slot 331. The slot 331 is a groove structure formed at the bottom of the T-shaped groove 31, and is evenly spaced along the length of the T-shaped groove 31. It is used to cooperate with the locking plate 332 to form a locking engagement, limiting and fixing the position of the slide rod 32. The locking plate 332 is fixedly connected to the slide rod 32. At the top of 2, the length direction of the locking plate 332 is consistent with the length direction of the T-shaped groove 31. The two ends of the locking plate 332 are used to insert into the slot 331 to realize the locking and locking between the slide rod 32 and the T-shaped groove 31. The elastic element 333 is a compression spring. The elastic element 333 is fixedly connected to the top surface of the locking plate 332 and located between the top wall of the locking plate 332 and the T-shaped groove 31. It is used to apply a downward elastic thrust to the locking plate 332 so that the locking plate 332 always remains locked in the slot 331 when no external force is applied.

[0041] Working principle: When in use, first determine the number of sign bodies 4 to be installed based on the number of running tracks in the school football field and the number of students participating in training. When installing the sign body 4, first rotate the slide rod 32 so that the card plate 332 at the top of the slide rod 32 is aligned with the length direction of the T-shaped groove 31, that is, the length direction of the card plate 332 is parallel to the extension direction of the T-shaped groove 31. At this time, the card plate 332 can smoothly enter the bottom groove of the T-shaped groove 31. Insert the card plate 332 at the top of the slide rod 32 into the T-shaped groove 31 along the length direction of the T-shaped groove 31. As the card plate 332 is continuously inserted, the elastic element 333 on the top surface of the card plate 332 is compressed and stored by the pressure of the top wall of the T-shaped groove 31. The elastic element 333 applies a downward elastic thrust to the card plate 332.

[0042] After the slide bar 32 slides along the T-slot 31 to the predetermined position of the track corresponding to the sign body 4, rotate the slide bar 32 again to rotate the locking plate 332 by a certain angle. At this time, the length direction of the locking plate 332 is perpendicular to the length direction of the T-slot 31, and the two ends of the locking plate 332 are respectively aligned with the corresponding locking slots 331 at the bottom of the T-slot 31. Since the elastic element 333 is in a compressed state, under the elastic thrust of the elastic element 333, the locking plate 332 is pushed downward, and the two ends of the locking plate 332 are respectively locked into the corresponding locking slots 331, realizing the locking and locking of the slide bar 32 and the T-slot 31, and completing the position fixing of the sign body 4. Repeat the above operation to install the remaining sign bodies 4 in sequence.

[0043] After each sign body 4 is installed, the support pole 11 is erected on both sides of the track, so that the crossbar 12 spans across multiple tracks. Each sign body 4 is located above the center line of its corresponding track. Each sign body 4 is connected to the teacher's terminal device via wired or wireless means.

[0044] After training begins, students on each track start running back and forth simultaneously. When a student on a track first reaches the location of the marker body 4, the sensor 6 at the bottom of the marker body 4 senses the student's approach. For example, if the infrared light is blocked or the distance value reaches a set threshold, the sensor 6 sends a trigger signal to the control unit. The control unit records the start time and accumulates the number of back-and-forth runs as one. After the student touches or goes around the marker body 4, they run back to the starting point. When they run back to the location of the marker body 4 again, the sensor 6 is triggered again. The control unit records the time of this back-and-forth run and accumulates the number of back-and-forth runs as two, and so on.

[0045] The time taken for each turn and the cumulative number of turns are displayed in real time on the display screen 5 on the side of the main body of the sign 4, and are also transmitted to the teacher's terminal in real time through the communication unit. Teachers can view the training progress and various data of all students on the track at the same time, which effectively reduces the training management burden of teachers.

[0046] When it is necessary to adjust the position of a certain logo body 4, first push the slide bar 32 upward to compress the elastic element 333 of the locking plate 332 and disengage it from the locking groove 331. Then rotate the slide bar 32 so that the locking plate 332 is aligned with the length direction of the T-shaped groove 31. Then push the slide bar 32 to slide along the T-shaped groove 31 to the new position. Rotate the slide bar 32 again to make the locking plate 332 engage in the new locking groove 331 to complete the relocking.

[0047] Example 2:

[0048] As attached Figure 6 To be continued Figure 7As shown, this embodiment is basically the same as the previous embodiment, except that a disassembly assembly 7 is provided between the slide bar 32 and the sign body 4. The disassembly assembly 7 is used to realize the detachable connection between the sign body 4 and the slide bar 32, so that the sign body 4 can be flexibly installed or disassembled according to training needs, and facilitates the independent maintenance and replacement of a single sign body 4.

[0049] The assembly / disassembly component 7 includes an insertion hole 71 at the bottom of the slide bar 32 and an insertion rod 72 fixedly connected to the top of the sign body 4. The insertion hole 71 is a blind hole structure at the bottom of the slide bar 32, extending upward along the axis of the slide bar 32, used to accommodate the insertion rod 72, providing initial positioning and guidance for the installation of the sign body 4. The insertion rod 72 is a vertical rod fixedly connected to the top of the sign body 4, and its outer diameter is adapted to the inner diameter of the insertion hole 71. The insertion rod 72 is inserted upward into the insertion hole 71 to achieve the initial insertion and engagement between the sign body 4 and the slide bar 32.

[0050] A drive ring 73 is threaded onto the external side of the slide rod 32. Two connecting seats 74 are symmetrically fixedly connected to the drive ring 73. Clamping plates 75 are rotatably connected to each of the two connecting seats 74. Each clamping plate 75 has a guide groove 76, which consists of a straight groove section and an inclined groove section connected together. The drive ring 73 is an annular component threaded onto the outside of the slide rod 32, capable of rotating and moving up and down along the axis of the slide rod 32. Rotating the drive ring 73 drives the connecting seats 74 and clamping plates 75 to move up and down, serving as the driving source for the opening and closing action of the clamping plates 75. The connecting seats 74 are two symmetrical lug structures fixedly mounted on the drive ring 73, used to... The motion is transmitted to the clamping plate 75, and the connecting seat 74 is rotatably connected to the clamping plate 75 through a pin, so that the clamping plate 75 can swing freely on the connecting seat 74. One end of each clamping plate 75 is rotatably connected to the connecting seat 74 through a pin, and the other end is provided with a claw for engaging the annular groove 791. The two clamping plates 75 can open or close relative to each other under the drive of the drive ring 73. The guide groove 76 is a long strip-shaped through groove opened on the surface of the clamping plate 75, which is composed of a straight groove section and an inclined groove section connected together. The straight groove section extends along the length direction of the clamping plate 75, and the inclined groove section is inclined to the outside of the clamping plate 75 relative to the straight groove section, and is used to cooperate with the fixed shaft 78 to control the movement trajectory of the clamping plate 75.

[0051] Two fixed seats 77 are symmetrically fixedly connected to the bottom of the slide rod 32. A fixed shaft 78 is fixedly connected to each of the two fixed seats 77. The two fixed shafts 78 are respectively inserted into the guide grooves 76 of the two clamping plates 75. The fixed seats 77 are symmetrically distributed on both sides of the slide rod 32. They are used to install the fixed shafts 78 and provide support for the fixed shafts 78. The fixed shafts 78 are cylindrical shaft pins fixedly set on the fixed seats 77. The fixed shafts 78 are slidably inserted into the guide grooves 76 of the clamping plates 75. When the clamping plates 75 move, the fixed shafts 78 slide relative to each other along the guide grooves 76. The clamping plates 75 are driven to perform opening or closing actions through the cooperation between the fixed shafts 78 and the guide grooves 76.

[0052] A connecting plate 79 is provided on the insertion rod 72. An annular groove 791 is provided at the bottom of the connecting plate 79. The ends of the two clamping plates 75 are engaged in the annular groove 791. The annular groove 791 at the bottom of the connecting plate 79 is used to engage with the ends of the clamping plates 75 to achieve locking and fixing between the insertion rod 72 and the slide rod 32. The annular groove 791 is an annular groove opened on the bottom surface of the connecting plate 79, extending in a circular shape around the axis of the insertion rod 72. It is used to accommodate the end claws of the clamping plates 75, so that the clamping plates 75 can hold and lock the insertion rod 72 from multiple directions.

[0053] The connecting plate 79 is located in the middle of the insertion rod 72. The annular groove 791 is an annular groove opened around the axis of the insertion rod 72. The end of the clamping plate 75 is provided with a claw that matches the annular groove 791. The top end of the insertion rod 72 passes through the connecting plate 79 and is inserted into the insertion hole 71.

[0054] Working principle: When the sign body 4 needs to be installed on the slide bar 32, first rotate the drive ring 73 to move it downward along the external thread section of the slide bar 32. When the drive ring 73 moves downward, it drives the two clamping plates 75 to move downward through the two connecting seats 74. In the initial state, the fixed shaft 78 is located in the straight groove section of the guide groove 76, and the clamping plates 75 are in the closed state. As the clamping plates 75 continue to move downward, the fixed shaft 78 enters the inclined groove section of the guide groove 76. Since the inclined groove section is inclined to the outside of the clamping plates 75, the fixed shaft 78 is inclined to the outside of the guide groove 76. The inner wall of the groove section exerts a squeezing effect, forcing the free ends of the two clamping plates 75 to open outwards. The insertion rod 72 at the top of the sign body 4 is aligned with the insertion hole 71 at the bottom of the slide rod 32 and inserted upwards. After the claws at the end of the opened clamping plates 75 cross the connecting plate 79, the drive ring 73 is rotated in the opposite direction to move it upwards. As the clamping plates 75 move upwards, the fixed shaft 78 retracts from the inclined groove section to the straight groove section. The two clamping plates 75 close and reset, and the claws are engaged in the annular groove 791 at the bottom of the connecting plate 79, completing the locking and installation of the sign body 4.

[0055] When the sign body 4 needs to be removed from the slide bar 32 for maintenance or replacement, rotate the drive ring 73 to move it downward along the slide bar 32. The drive ring 73 drives the clamping plate 75 downward through the connecting seat 74. The fixed shaft 78 enters the inclined groove section from the straight groove section of the guide groove 76. The fixed shaft 78 presses the inner wall of the inclined groove section to make the two clamping plates 75 open outward. The claws at the ends of the clamping plates 75 disengage from the annular groove 791, releasing the lock on the connecting plate 79. At this time, pull down the sign body 4, and the insertion rod 72 exits from the insertion hole 71, so that the sign body 4 can be removed from the slide bar 32. If it is necessary to replace or maintain a certain sign body 4, only the faulty sign body 4 needs to be disassembled. There is no need to disassemble other sign bodies 4 or disassemble the entire device.

[0056] The disassembly and assembly assembly 7, through the cooperation of the drive ring 73, clamping plate 75, guide groove 76 and fixed shaft 78, enables the quick disassembly and assembly of the marking body 4 by simply rotating the drive ring 73. The operation is simple and quick. At the same time, the annular snap-fit ​​structure of the clamping plate 75 and the annular groove 791 ensures the reliability and stability of the locking.

[0057] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-person synchronous campus football shuttle run training marking device, comprising a support (1), wherein the support (1) comprises two symmetrically arranged support rods (11) and a crossbar (12) disposed between the top ends of the two support rods (11), and support rods (2) are symmetrically arranged on the outer sides of the two support rods (11), characterized in that, It also includes multiple sign bodies (4), and each of the sign bodies (4) is provided with a connecting component (3) between it and the horizontal bar (12). The connecting component (3) includes a T-shaped groove (31) opened along the length direction of the horizontal bar (12) and a slide rod (32) slidably connected in the T-shaped groove (31). The marking body (4) is connected to the bottom of the slide rod (32). The connecting component (3) also includes a locking member (33) for locking the slide rod (32) at any position in the T-shaped groove (31). The sign body (4) is provided with a display screen (5) on its side and a sensor (6) on its bottom.

2. The multi-person synchronous campus football shuttle run training marking device according to claim 1, characterized in that, Both of the support rods (11) have hollow cavities (111) inside, which are used to place counterweights.

3. The multi-person synchronous campus football shuttle run training marking device according to claim 1, characterized in that, The locking component (33) includes a slot (331) formed at the bottom of the T-shaped groove (31), a locking plate (332) is fixedly connected to the top of the slide rod (32), and an elastic element (333) is fixedly connected to the top surface of the locking plate (332).

4. The multi-person synchronous campus football shuttle run training marking device according to claim 3, characterized in that, The card slots (331) are provided in multiple ways and are evenly spaced along the length of the T-shaped slot (31), and the card plate (332) is engaged in the corresponding card slot (331).

5. The multi-person synchronous campus football shuttle run training marking device according to claim 4, characterized in that, The length direction of the card plate (332) is consistent with the length direction of the T-slot (31), and the elastic element (333) is a compression spring.

6. The multi-person synchronous campus football shuttle run training marking device according to claim 1, characterized in that, A disassembly assembly (7) is provided between the slide bar (32) and the sign body (4), and the disassembly assembly (7) is used to realize the detachable connection between the sign body (4) and the slide bar (32).

7. A multi-person synchronous campus football shuttle run training marking device according to claim 6, characterized in that, The assembly / disassembly assembly (7) includes an insertion hole (71) at the bottom of the slide bar (32) and an insertion rod (72) fixedly connected to the top of the sign body (4). The slide bar (32) is externally threaded with a drive ring (73), and two connecting seats (74) are symmetrically fixedly connected to the drive ring (73). The two connecting seats (74) are respectively rotatably connected with clamps (75). Both clamps (75) are provided with guide grooves (76). The guide grooves (76) are composed of a straight groove section and an inclined groove section connected together. The bottom of the slide bar (32) is symmetrically fixedly connected to two fixed seats (77), and fixed shafts (78) are fixedly connected to both fixed seats (77). The two fixed shafts (78) are respectively inserted into the guide grooves (76) of the two clamping plates (75).

8. A multi-person synchronous campus football shuttle run training marking device according to claim 7, characterized in that, The insertion rod (72) is provided with a connecting plate (79), and the bottom of the connecting plate (79) is provided with an annular groove (791). The ends of the two clamping plates (75) are engaged in the annular groove (791).

9. A multi-person synchronous campus football shuttle run training marking device according to claim 8, characterized in that, The connecting plate (79) is located in the middle of the insert rod (72), the annular groove (791) is an annular groove opened around the axis of the insert rod (72), and the end of the clamping plate (75) is provided with a claw that matches the annular groove (791).

10. A multi-person synchronous campus football shuttle run training marking device according to claim 9, characterized in that, The top end of the insertion rod (72) passes through the connecting plate (79) and is inserted into the insertion hole (71).

Images