A barbell anti-fall device and method

Abstract

This invention relates to the field of fitness equipment technology and discloses a barbell anti-fall device and method, including a frame and two detachable hangers mounted on the frame, with a barbell suspended on the two hangers. The frame includes a U-shaped base frame and two support beams mounted on the top of the U-shaped base frame. Each support beam includes two steel columns and two connecting blocks, with the two connecting blocks distributed at the top and bottom of the opposite sides of the two steel columns, forming a gap between the two steel columns. A rectangular frame is mounted on the top of the two support beams. This invention utilizes a positioning arm, fiber rope, pulley A, pulley B, and anti-fall blocks working in concert to ensure a rapid response and prevent the barbell from falling when it does, while also preventing the fiber rope from becoming overly taut or detaching. The height of the positioning arm is adjustable to accommodate users with high training needs, increasing the flexibility of the equipment.

Description

Technical Field

[0001] This invention relates to the field of fitness equipment technology, specifically to a barbell anti-fall device and method. Background Technology

[0002] In modern fitness, barbells are a common strength training tool widely used in gyms and home workout environments. Barbell training can effectively improve athletes' strength, muscle mass, and athletic performance. However, during barbell training, especially when performing heavy exercises such as bench presses and squats, athletes may lose control of the barbell due to insufficient strength or incorrect form, resulting in a barbell fall. Such accidents can range from minor injuries to life-threatening situations.

[0003] To reduce safety risks during barbell training, many barbell fall prevention devices have been developed. The main function of these devices is to take timely measures to prevent the barbell from falling when the athlete loses control, thereby protecting the athlete's safety. They primarily use supports to block the falling barbell; however, the design of these supports also has some drawbacks:

[0004] The position of the safety bracket may restrict the weightlifter's squatting motion, especially when performing low bar squats. The safety bracket may touch the barbell before the weightlifter reaches a full squat position, thus limiting the squat depth. Therefore, the position of the safety bracket can easily affect the user's performance.

[0005] In some cases, if safety brackets are not set up or used properly, they may not be effective in preventing the barbell from falling, especially when the weightlifter loses his balance or falls suddenly.

[0006] To address these issues, this invention proposes a barbell anti-fall device. Summary of the Invention

[0007] To address the aforementioned shortcomings of existing technologies, this invention provides a barbell fall prevention device and method, improving the safety of barbell training and reducing injuries caused by barbell falls. Through a series of innovative designs, this device effectively supports and protects the barbell, ensuring the safety of athletes during training.

[0008] The present invention provides the following technical solution: a barbell anti-fall device, comprising a frame and two hangers detachably mounted on the frame, wherein a barbell is suspended on the two hangers. The frame comprises a U-shaped bottom frame and two support beams mounted on the top of the U-shaped bottom frame. Each support beam comprises two steel columns and two connecting blocks, wherein the two connecting blocks are distributed at the top and bottom of the opposite sides of the two steel columns, and a gap is formed between the two steel columns. A rectangular frame is mounted on the top of the two support beams, and a triangular stabilizer connected to the U-shaped bottom frame and the rectangular frame is mounted on both the top and bottom of the support beams.

[0009] Both of the support beams are equipped with sliding positioning arms, and the positioning arms are adjusted and locked on the support beams. The outer side of the rectangular frame is equipped with several sets of A pulleys, and the several sets of A pulleys are equipped with fiber ropes. The fiber ropes extend downward from the two A pulleys at the edge. One end of the fiber rope is connected to the anti-fall block through the hole on the positioning arm, and the other end of the fiber rope is detachably connected to the movable sleeves at both ends of the barbell. The movable sleeves can rotate at both ends of the barbell.

[0010] The steel column is equipped with a scale for distance measurement, which keeps the two positioning arms at the same height and prevents the fall block from blocking the barbell, and prevents the barbell from falling through the fiber rope.

[0011] Preferably, the steel column has several sets of equally spaced holes, and the bracket is connected to the holes on the steel column by bolts, so that the position of the bracket can be adjusted through the holes on the steel column.

[0012] Preferably, the two ends of the U-shaped base frame are detachably equipped with outwardly extending stabilizing columns, and the stabilizing columns are inserted into the end face of the U-shaped base frame through rectangular inserts. The stabilizing columns increase the contact area of ​​the U-shaped base frame and enhance its support performance.

[0013] Preferably, each of the two triangular stabilizers at the top of the support beam is equipped with a B pulley for positioning the fiber rope. The B pulley guides the fiber rope and prevents it from detaching from the A pulley.

[0014] Preferably, the positioning arm includes a bracket mounted on a support beam, and the bracket is detachably mounted on the support beam. A positioning element is installed on the bracket between two steel columns, and the opposite surfaces of the two steel columns are provided with grooves. A straight toothed rack is provided in the groove of the steel column. The positioning element slides between the two steel columns and contacts the straight toothed rack to lock.

[0015] Preferably, the bracket includes a U-shaped component that slides on the support beam, and a positioning component is installed inside the U-shaped component by bolts. A triangular support arm is installed on one side of the U-shaped component, and a support plate for blocking the passage of the fall arrestor is installed on one side of the triangular support arm. The support plate is provided with holes for the passage of the fiber rope. Slide rails are installed on both ends of the U-shaped component, and the U-shaped component is slidably connected to the support plate through the slide rails. The support plate is connected to the slide rails by bolts.

[0016] Preferably, the positioning element includes a rectangular shell and a rotatable drive shaft disposed inside the rectangular shell, with the drive shaft extending from the top of the rectangular shell. The rectangular shell contains four rotatable and symmetrically distributed threaded columns, and the drive shaft and the four threaded columns are driven by bevel gears. The drive shaft has a rotatable positioning column in the middle, and both ends of the positioning column have slidable rack blocks. Every two threaded columns are threadedly connected to one rack block, and the rack blocks extend from the side of the rectangular shell. By rotating the drive shaft, the threaded columns are rotated, causing the rack blocks to extend from the side of the rectangular shell and contact the straight rack of the steel column groove.

[0017] Preferably, the movable sleeve includes an end plate and a connecting shaft installed at one end of the end plate. Both ends of the barbell are provided with movable grooves, and the connecting shaft is rotatably connected to the movable grooves. The fiber rope is fastened to the ring on the end plate by a safety buckle.

[0018] Preferably, the connecting shaft includes a shaft rod and a trumpet-shaped shaft end connected to the shaft rod. The surface of the shaft end is covered with two half-separated positioning sleeves, and the shaft end rotates within the positioning sleeves. The surface of the positioning sleeves is provided with positioning strips, and the inner wall of the movable groove on the barbell is provided with a groove for inserting the positioning strips. The diameter of the positioning sleeves is the same as the diameter of the shaft rod. The barbell locks the positioning sleeves with bolts, so that the connecting shaft rotates at both ends of the barbell.

[0019] A method to prevent barbells from falling, the specific steps are as follows:

[0020] S1. Adjust and lock the height of the two positioning arms as needed, ensuring they are at the same height. Then adjust the position of the two hangers. Finally, hang the barbell on the two hangers and connect the fiber rope to the barbell to begin training.

[0021] S2. During training, after the barbell leaves the hands, it causes the fiber rope to fall rapidly. The other end of the fiber rope causes the anti-fall block to rise rapidly and be blocked by the positioning arm. Under the pull of the fiber rope, the barbell stops falling.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The frame consists of a U-shaped bottom frame, support beams, rectangular frame and triangular stabilizer. The combination of steel columns and connecting blocks and the setting of triangular stabilizer enhance the stability of the entire frame and can effectively prevent the frame from shaking or deforming during use. The design of the U-shaped bottom frame ensures stability while reducing the structure at the front end of the frame, providing users with an unobstructed training space and facilitating various barbell training movements.

[0024] (2) The positioning arm, fiber rope, pulley A, pulley B and anti-fall block work together to ensure a quick response and prevent the fall when the barbell falls, while preventing the fiber rope from being over-tensioned or falling off. The height of the positioning arm is adjustable to adapt to users with high training needs and increase the flexibility of the equipment. The detachable design of the positioning arm makes maintenance and replacement more convenient and improves the long-term performance of the equipment.

[0025] (3) The design of the equipment takes into account the user's habits. For example, the rotatable design of the movable sleeve reduces the torque on the fiber rope and improves the comfort and safety during training. The design of the connecting shaft and positioning sleeve not only ensures the stability of the barbell during training, but also protects the barbell itself from damage and falling. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the framework of the present invention;

[0028] Figure 3 This is a schematic diagram of the positioning arm of the present invention;

[0029] Figure 4 This is a schematic diagram of the bracket structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the positioning component of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the movable sleeve of the present invention;

[0032] Figure 7 This is a schematic diagram of the connecting shaft of the present invention.

[0033] In the diagram: 1. Frame; 2. Hanger; 3. Barbell; 4. Positioning arm; 5. A pulley; 6. Fiber rope; 7. Anti-fall block; 8. Movable sleeve; 9. B pulley; 10. Stabilizing column; 11. U-shaped base frame; 12. Support beam; 13. Steel column; 14. Connecting block; 15. Rectangular frame; 16. Triangular stabilizer; 17. Stabilizing column; 18. Rectangular insert; 41. Bracket; 42. Positioning component; 43. 411. Straight rack; 412. U-shaped part; 413. Triangular support arm; 414. Support plate; 415. Slide rail; 416. Support plate; 427. Rectangular shell; 428. Drive shaft; 429. Threaded column; 420. Positioning column; 421. Rack block; 822. End plate; 83. Connecting shaft; 84. Movable groove; 85. Safety buckle; 86. Shaft rod; 87. Shaft end; 88. Positioning sleeve; 89. Positioning strip. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. In order to keep the following description of the embodiments of this disclosure clear and concise, detailed descriptions of known functions and known components are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0035] Please see Figure 1 A barbell anti-fall device includes a frame 1 and two hangers 2 detachably mounted on the frame 1, with a barbell 3 suspended on the two hangers 2;

[0036] Please see Figure 2 The frame 1 includes a U-shaped base frame 11 and two support beams 12 mounted on top of the U-shaped base frame 11. Each support beam 12 includes two steel columns 13 and two connecting blocks 14. The two connecting blocks 14 are distributed at the top and bottom ends of the opposite faces of the two steel columns 13, forming a gap between the two steel columns 13. This design enhances the stability of the structure, and the combination of the steel columns 13 and the connecting blocks 14 provides sufficient support.

[0037] A rectangular frame 15 is installed at the top of each of the two support beams 12. Triangular stabilizers 16, which are connected to the U-shaped bottom frame 11 and the rectangular frame 15, are installed at both the top and bottom of the support beams 12. The triangular stabilizers 16 enhance the stability of the entire frame, effectively preventing the frame from swaying or deforming during use, reducing the need for other reinforcing structures, lowering the overall volume of the frame 1, and allowing for movement at the front end of the frame 1.

[0038] The steel column 13 has several sets of equidistantly distributed holes, and the bracket 2 is connected to the holes on the steel column 13 by bolts. In this way, the position of the bracket 2 can be adjusted through the holes on the steel column 13 to meet the needs of different users.

[0039] The two ends of the U-shaped base frame 11 are detachably equipped with outwardly extending stabilizing columns 17, and the stabilizing columns 17 are inserted into the end face of the U-shaped base frame 11 through rectangular inserts 18. The stabilizing columns 17 increase the contact area of ​​the U-shaped base frame 11 and enhance the support performance. In this way, the rear part of the U-shaped base frame 11 is unobstructed and the space in this area is large, making it convenient for users to make contact in this area.

[0040] Please see Figure 1 Each of the two support beams 12 is equipped with a sliding positioning arm 4, which can be adjusted and locked on the support beam 12. The outer side of the rectangular frame 15 is equipped with several sets of A pulleys 5, and the A pulleys 5 are equipped with fiber ropes 6. The fiber ropes 6 extend downward from the two A pulleys 5 at the edge. One end of the fiber rope 6 is connected to the anti-fall block 7 through the hole on the positioning arm 4, and the other end of the fiber rope 6 is detachably connected to the movable sleeves 8 at both ends of the barbell 3. The movable sleeves 8 can rotate at both ends of the barbell 3. The steel column 13 is equipped with a scale for measuring distance, so that the two positioning arms 4 are kept at the same height and block the anti-fall block 7. The fiber rope 6 prevents the barbell 3 from falling. This design can ensure that when the barbell falls accidentally, the positioning arm can accurately block the anti-fall block, thereby effectively preventing the barbell from falling further.

[0041] The two triangular stabilizers 16 at the top of the support beam 12 are each equipped with B pulleys 9 for positioning the fiber rope 6. The B pulleys 9 guide the fiber rope 6 to prevent it from detaching from the A pulley 5 and to avoid the fiber rope 6 from falling off the A pulley 5 due to excessive tension during the fall of the barbell 3. The problem of guiding the fiber rope 6 can be solved by using two B pulleys 9.

[0042] Please see Figure 3 The positioning arm 4 includes a bracket 41 mounted on the support beam 12, and the bracket 41 is detachably mounted on the support beam 12. A positioning element 42 is mounted on the bracket 41 between two steel columns 13. Each of the two steel columns 13 has a groove on its opposite surface, and a straight toothed rack 43 is installed within the groove of each steel column 13. The positioning element 42 slides between the two steel columns 13 and engages with the straight toothed rack 43 for locking. Because the positioning arm 4 is subject to the impact of the anti-fall block 7, it is prone to deformation. Therefore, the detachable design makes the positioning arm 4 easy to install and maintain. Users can quickly change or adjust the position of the positioning arm as needed, improving the adaptability and convenience of the equipment. The positioning element 42 also locks the steel columns 13. Located between the two steel columns 13, the positioning element 42 is convenient for adjustment while also protecting itself, ensuring even force distribution on the two steel columns 13.

[0043] Please see Figure 4The bracket 41 includes a U-shaped member 411 that slides on the support beam 12, and a positioning member 42 is bolted to the inside of the U-shaped member 411. A triangular support arm 412 is mounted on one side of the U-shaped member 411, and a support plate 413 for blocking the passage of the fall arrestor 7 is mounted on one side of the triangular support arm 412. The support plate 413 has holes for the fiber rope 6 to pass through. The design of the U-shaped member 411 and the support structure of the triangular support arm 412 provide additional stability. This structural design reduces the possibility of displacement of the positioning arm 4 under high load or accidental impact, ensuring the stability of the equipment during use.

[0044] Both end faces of the U-shaped component 411 are equipped with slide rails 414, and the U-shaped component 411 is slidably connected to the support plate 415 via the slide rails 414. The support plate 415 is connected to the slide rails 414 by bolts. The sliding connection design between the U-shaped component 411 and the support plate 415 allows the positioning arm 4 to move smoothly on the support beam 12. The combination of the slide rails 414 and bolts provides a stable sliding path and allows for quick installation of the positioning arm. If the positioning arm 4 is deformed, it can be replaced.

[0045] Furthermore, the slide rail 414 is provided with threaded holes, allowing the support plate 415 to guide the bolts into the threaded holes on the slide rail 414, preventing the support plate 415 from falling off and enhancing the stability of the support plate 415. The support plate 415 is provided with a corresponding slide rail 414, and the slide rail extends to the top of the support plate 415 but does not penetrate through it, so that after the support plate 415 is installed, the bolts are aligned with the threaded holes on the slide rail 414.

[0046] Please see Figure 5 The positioning component 42 includes a rectangular shell 421 and a rotatable drive shaft 422 disposed inside the rectangular shell 421, with the drive shaft 422 extending from the top of the rectangular shell 421. The rectangular shell 421 contains four rotatable and symmetrically distributed threaded posts 423, and the drive shaft 422 and the four threaded posts 423 are connected by bevel gears. A rotatable positioning post 424 is located in the middle of the drive shaft 422, and each end of the positioning post 424 has a slidable rack block 425. Every two threaded posts 423 are threadedly connected to one rack block 425, and the rack block 425 extends from the side of the rectangular shell 421.

[0047] By rotating the drive shaft 422, the four threaded posts 423 rotate simultaneously under the meshing transmission of the bevel gears, causing the rack block 425 to extend from the side of the rectangular shell 421 and contact the straight rack 43 in the groove of the steel post 13, thus locking its position. The positioning post 424 is mainly used to guide the position of the rack block 425 during its movement, preventing it from shifting. The bevel gear meshing transmission design between the drive shaft 422 and the threaded posts 423, as well as the threaded connection between the positioning post 424 and the rack block 425, constitute a built-in locking mechanism. This mechanism ensures that the positioning arm 4 is fixed in position after it is adjusted to the appropriate position, preventing accidental slippage during training.

[0048] Please see Figure 6 The movable sleeve 8 includes an end plate 81 and a connecting shaft 82 installed at one end of the end plate 81. Both ends of the barbell 3 are provided with movable grooves 83, and the connecting shaft 82 is rotatably connected to the movable grooves 83. The fiber rope 6 is fastened to the ring on the end plate 81 by a safety buckle 84. During training, the barbell 3 will roll due to different habits of each person. Therefore, the safety buckle 84 is fastened to the rotatable movable sleeve 8 to prevent excessive torque on the fiber rope 6 during the rolling of the barbell 3. The ring on the end plate 81 needs to be connected stably enough, preferably integrally formed to resist the tension during the fall of the barbell 3.

[0049] Please see Figure 7 The connecting shaft 82 includes a shaft 85 and a trumpet-shaped shaft end 86 connected to the shaft 85. The surface of the shaft end 86 is covered with two half-separated positioning sleeves 87, and the shaft end 86 rotates within the positioning sleeves 87. The surface of the positioning sleeves 87 is provided with positioning strips 88, and the inner wall of the movable groove 83 on the barbell 3 is provided with a groove for inserting the positioning strips 88. The diameter of the positioning sleeves 87 is the same as the diameter of the shaft 85. The barbell 3 locks the positioning sleeves 87 with bolts, so that the connecting shaft 82 rotates at both ends of the barbell 3.

[0050] The movable sleeve 8 can rotate at both ends of the barbell 3 and can also be pulled by the fiber rope 6. It is not easy to break. The shaft end 86 rotates in the two positioning sleeves 87, and the two positioning sleeves 87 are fixed in the movable groove 83 on the barbell 3 by bolts. In this way, the two positioning sleeves 87 are fixed, and the position of the shaft end 86 is also fixed. Thus, the connecting shaft 82 will not detach from the barbell 3, and the connecting shaft 82 provides support for the end plate 81, so that the movable sleeve 8 is not easy to break or fall off after being pulled by the fiber rope 6.

[0051] The positioning strip 88 on the surface of the positioning sleeve 87 also facilitates the insertion of the positioning sleeve 87 into the movable groove 83 on the barbell 3 to position the threaded hole thereon. When the positioning sleeve 87 reaches the bottom end along the groove in the movable groove 83, the threaded hole on the positioning sleeve 87 corresponds to the threaded hole on the barbell 3, which facilitates the installation of bolts.

[0052] A method to prevent barbells from falling, the specific steps are as follows:

[0053] S1. Adjust and lock the height of the two positioning arms 4 as needed, and keep them at the same height. Then adjust the position of the two hangers 2. Finally, hang the barbell 3 on the two hangers 2 and connect the fiber rope 6 to the barbell 3. Then you can start training.

[0054] S2. During training, after the barbell 3 is released from the hands, the barbell 3 causes the fiber rope 6 to fall rapidly. The other end of the fiber rope 6 causes the anti-fall block 7 to rise rapidly and be blocked by the positioning arm 4. Under the pull of the fiber rope 6, the barbell 3 stops falling.

[0055] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A barbell anti-fall device, comprising a frame (1) and two hangers (2) detachably mounted on the frame (1), wherein a barbell (3) is suspended on the two hangers (2), characterized in that: The frame (1) includes a U-shaped bottom frame (11) and two support beams (12) installed on the top of the U-shaped bottom frame (11). The support beams (12) include two steel columns (13) and two connecting blocks (14). The two connecting blocks (14) are distributed at the top and bottom of the opposite sides of the two steel columns (13), forming a gap between the two steel columns (13). A rectangular frame (15) is installed at the top of the two support beams (12), and a triangular stabilizer (16) connected to the U-shaped bottom frame (11) and the rectangular frame (15) is installed at both the top and bottom of the support beams (12). Both of the support beams (12) are provided with sliding positioning arms (4), and the positioning arms (4) are adjusted and locked on the support beams (12). The outer side of the rectangular frame (15) is provided with several sets of A pulleys (5), and the several sets of A pulleys (5) are provided with fiber ropes (6). The fiber ropes (6) extend downward from the two A pulleys (5) at the edge. One end of the fiber rope (6) is connected to the anti-fall block (7) through the hole on the positioning arm (4), and the other end of the fiber rope (6) is detachably connected to the movable sleeves (8) at both ends of the barbell (3). The movable sleeves (8) can rotate at both ends of the barbell (3). The steel column (13) is provided with a scale for measuring distance, so that the two positioning arms (4) are kept at the same height and the anti-fall block (7) is blocked, and the barbell (3) is blocked from falling by the fiber rope (6). The positioning arm (4) includes a bracket (41) set on the support beam (12), and the bracket (41) is detachably installed on the support beam (12). The bracket (41) is equipped with a positioning element (42) located between two steel columns (13), and the two steel columns (13) have grooves on their opposite surfaces. A straight rack (43) is provided in the groove of the steel column (13). The positioning element (42) slides between the two steel columns (13) and contacts the straight rack (43) for locking. The positioning element (42) includes a rectangular shell (421) and a rotatable drive shaft (422) disposed inside the rectangular shell (421). The drive shaft (422) extends from the top of the rectangular shell (421). The rectangular shell (421) has four rotatable and symmetrically distributed threaded posts (423) inside. The drive shaft (422) and the four threaded posts (423) are driven by bevel gear meshing. The drive shaft (422) has a rotatable positioning element in the middle. The column (424) has sliding rack blocks (425) at both ends, and every two threaded columns (423) are threadedly connected to one rack block (425). The rack block (425) extends from the side of the rectangular shell (421). By rotating the drive shaft (422), the threaded column (423) is rotated, and the rack block (425) extends from the side of the rectangular shell (421) to contact the straight rack (43) in the groove of the steel column (13).

2. The barbell anti-fall device according to claim 1, characterized in that: The steel column (13) has several sets of equally spaced holes, and the bracket (2) is connected to the holes on the steel column (13) by bolts. The position of the bracket (2) can be adjusted through the holes on the steel column (13).

3. The barbell anti-fall device according to claim 1, characterized in that: The two ends of the U-shaped bottom frame (11) are detachably equipped with outwardly extending stabilizing columns (17), and the stabilizing columns (17) are inserted into the end face of the U-shaped bottom frame (11) through rectangular inserts (18). The stabilizing columns (17) increase the contact area of ​​the U-shaped bottom frame (11) and enhance the support performance.

4. The barbell anti-fall device according to claim 1, characterized in that: The two triangular stabilizers (16) at the top of the support beam (12) are each equipped with a B pulley (9) for positioning the fiber rope (6). The fiber rope (6) is guided by the B pulley (9) to prevent the fiber rope (6) from falling off the A pulley (5).

5. The barbell anti-fall device according to claim 1, characterized in that: The bracket (41) includes a U-shaped part (411) that slides on the support beam (12), and a positioning part (42) is installed on the inside of the U-shaped part (411) by bolts. A triangular support arm (412) is installed on one side of the U-shaped part (411), and a support plate (413) for blocking the passage of the fall arrestor (7) is installed on one side of the triangular support arm (412). The support plate (413) is provided with holes for the fiber rope (6) to pass through. Slide rails (414) are installed on both ends of the U-shaped part (411), and the U-shaped part (411) is slidably connected to the support plate (415) through the slide rails (414). The support plate (415) is connected to the slide rails (414) by bolts.

6. The barbell anti-fall device according to claim 1, characterized in that: The movable sleeve (8) includes an end plate (81) and a connecting shaft (82) installed at one end of the end plate (81). Both ends of the barbell (3) are provided with movable grooves (83), and the connecting shaft (82) is rotatably connected to the movable grooves (83). The fiber rope (6) is fastened to the ring of the end plate (81) by a safety buckle (84).

7. A barbell anti-fall device according to claim 6, characterized in that: The connecting shaft (82) includes a shaft (85) and a flared shaft end (86) connected to the shaft (85). The surface of the shaft end (86) is covered with two half-separated positioning sleeves (87), and the shaft end (86) rotates inside the positioning sleeves (87). The surface of the positioning sleeves (87) is provided with positioning strips (88), and the inner wall of the movable groove (83) on the barbell (3) is provided with a groove for the positioning strips (88) to be inserted. The diameter of the positioning sleeves (87) is the same as the diameter of the shaft (85). The barbell (3) locks the positioning sleeves (87) with bolts, so that the connecting shaft (82) rotates at both ends of the barbell (3).

8. A method for preventing barbell falls, characterized in that, The barbell anti-fall device according to any one of claims 1-7 is operated as follows: S1. Adjust the height of the two positioning arms (4) as needed and lock them, and keep them at the same height. Then adjust the position of the two hangers (2). Finally, hang the barbell (3) on the two hangers (2) and connect the fiber rope (6) to the barbell (3) to start training. S2. During the training process, after the barbell (3) is released from the hands, the barbell (3) causes the fiber rope (6) to fall rapidly. The other end of the fiber rope (6) causes the anti-fall block (7) to rise rapidly and is blocked by the positioning arm (4). Under the pull of the fiber rope (6), the barbell (3) stops falling.

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