A bench press machine with automatic protection function

Abstract

This invention relates to the field of sports equipment technology and discloses a bench press machine with automatic protection function. It includes a bench press frame with a support column at the top and limit components on both sides. A barbell assembly is movably mounted on the limit components. The barbell assembly includes two barbell bars connected by a connecting rod in the shape of an inverted "U". This invention significantly improves the protection for the exerciser and eliminates the need for adjustment of the protective frame before exercise. The inverted "U" shaped connecting rod between the two barbell bars effectively prevents chest compression even if they accidentally fall. A locking mechanism further secures the retractable components, immediately stopping the two barbell bars in case of accidental fall, thus greatly improving the safety of the bench press machine.

Description

Technical Field

[0001] This invention relates to the field of sports equipment technology, and in particular to a bench press machine with automatic safety function. Background Technology

[0002] The bench press machine is a fitness equipment used for weightlifting and upper body strength training. It is usually made of wood or iron and consists of a frame for placing the barbell and a bench for the user to lie on. The frame and bench can be integrated or separate, and are used by users to perform exercises such as bench press and seated press.

[0003] Because bench press exercises pose certain safety risks, existing bench press machines typically incorporate some level of safety features. For example, Chinese Patent Publication No. CN108499041A describes a hydraulic safety bench press frame, comprising a bench press frame, a hydraulically movable safety frame, and an adjustable seat. The bench press frame and the hydraulically movable safety frame are integrally connected. A fixed frame and a safety guide groove are also fixedly connected to form the bench press frame. The hydraulically movable safety frame includes a hydraulic control box and a support rod assembly. The hydraulic control box is welded to the support rod assembly, allowing for free movement of the support rod assembly. The adjustable seat is separate from the bench press frame and the hydraulically movable safety frame. This design fully utilizes the high efficiency, stability, durability, and impact cushioning advantages of hydraulic systems. While allowing users to achieve the desired bench press workout results, it also enables easy adjustment of the safety frame height, thus ensuring user safety.

[0004] Existing bench press machines typically require users to adjust the safety frame to an appropriate height before exercising, based on their body type, to prevent the barbell from directly hitting them. As described in the aforementioned patent, this invention requires the user to lower the support bar assembly by controlling a ball-shaped push switch at the front of the handle, thus stopping the support bar assembly in the user's preset position. Although the height adjustment range of the safety frame is greater than that of manual adjustment, each user still needs to actively adjust the safety frame before use. However, this step is often overlooked by beginners, and not all users are aware of the need for active adjustment. This still results in insufficient ease of use for users.

[0005] Therefore, we propose a bench press machine with automatic protection function to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a bench press device with automatic protection function to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a bench press machine with automatic protection function, comprising a bench press support, a support column provided at the top of the bench press support, limit components provided on both sides of the bench press support, a barbell assembly movably mounted on the limit components, the barbell assembly comprising two barbell bars, a connecting rod provided between the two barbell bars, the connecting rod having an inverted "U" shaped structure;

[0008] An automatic protection assembly includes two suspension components and two adaptive damping adjustment components. Each suspension component includes a safety strap, a winding component, and a locking component. The bottom of the safety strap is connected to a barbell bar via a rotating ring, and the top of the safety strap is connected to a support column via the winding component. The locking component is used to lock the winding component. Each adaptive damping adjustment component can adjust the reset speed of the locking component by adjusting the damping of the locking component.

[0009] By using the above technical solution, and by setting an inverted "U"-shaped connecting rod between the two barbell bars, it is possible to effectively prevent accidental compression of the user's chest during exercise. Furthermore, by locking the winding mechanism, the two barbell bars can be immediately locked in the event of an accidental fall, thereby significantly improving the safety of this bench press machine.

[0010] Furthermore, the barbell assembly also includes guide rails disposed on both sides of the bench press support, each guide rail having a connecting slider slidably connected thereto, each barbell bar being rotatably connected to a connecting slider, each barbell bar having an adjustable grip slidably connected thereto, and each barbell bar having a locking buckle.

[0011] Through the above technical solution, the two guide rails can limit the movement of the two barbell bars. During the bench press exercise, the barbell bars will move in the vertical direction, preventing them from tilting forward or backward, thus preventing them from losing control and further improving safety.

[0012] Furthermore, each barbell bar is provided with a limit block on the side away from the adjusting grip, each limit block is threadedly connected to an adjusting grip, each barbell bar is provided with a connecting plate, and each connecting plate is provided with a hanging rod on the side away from the barbell bar.

[0013] Furthermore, the limiting component includes two fixing plates, which are spaced apart on the side wall of the bench press support. Each fixing plate is vertically arranged, and each fixing plate is provided with multiple hooks spaced apart. Each hanging rod corresponds to multiple hooks on the side closest to the hanging rod, and each hook is used to suspend and support the hanging rod.

[0014] With the above technical solution, after completing a set of bench press exercises, the user only needs to rotate both barbells forward simultaneously to suspend them on hooks at the corresponding heights, making it easier for the user to pick up and put down the barbells.

[0015] Furthermore, each of the winding components includes a winding bracket, a reel, and a coil spring. The top of the winding bracket is fixedly connected to the bottom of the support column. The reel is rotatably connected to the winding bracket. One end of the coil spring is fixedly connected to the winding bracket, and the other end of the coil spring is fixedly connected to the reel. Each safety strap corresponds to one reel, and the end of each safety strap away from the rotating ring is fixedly connected to the corresponding reel.

[0016] With the above technical solution, when the user pushes the two barbell bars upwards, the coil spring will automatically retract the safety straps set on the reel, so that the safety straps are always taut during the user's exercise.

[0017] Furthermore, each of the locking components includes a mounting plate, a counterweight plate, and a locking shaft. The mounting plate is fixedly connected to the bottom of the support column, and the locking shaft is rotatably connected to the mounting plate. Multiple locking plates are spaced apart on the outer wall of the locking shaft, and the counterweight plate is located on the side of the locking shaft near the mounting plate.

[0018] Furthermore, the locking component also includes multiple actuating rods and a stop block. The multiple actuating rods are evenly distributed on the outer wall of the reel along the circumference of the reel. The multiple actuating rods cooperate with multiple locking plate structures. The stop block is disposed on the outer wall of the mounting plate and cooperates with the uppermost locking plate structure.

[0019] With the above technical solution, when the user performs bench press exercises, the two barbell bars will descend intermittently at a relatively slow speed. At this time, the reel can slowly rotate counterclockwise. When the user is exhausted and unable to effectively support the barbell bars, the speed of the reel will increase significantly. At this time, the locking plate will not have time to reset and will lock the lever, thereby allowing the barbell bars to stop falling quickly and protecting the user.

[0020] Furthermore, each of the adaptive damping adjustment components includes an air guide block and two air bladders. The air guide block is located at the bottom of the support column, and the two air bladders are spaced apart on both sides of the bottom of the air guide block. Each air bladder has an arc-shaped friction plate on the side near the locking shaft. Each guide rail has a pressure chamber inside, and a pressure piston is slidably connected in the pressure chamber. The number of pressure pistons and connecting sliders are equal and correspond one-to-one. Each pressure piston and connecting slider are connected by a Z-shaped connecting rod. The pressure chamber has an air inlet and an air outlet spaced apart. Both the air inlet and the air outlet are equipped with a one-way valve. The air outlet is connected to the two air bladders through an air guide tube.

[0021] Furthermore, each of the adaptive damping adjustment components also includes a reset component, which includes a sliding support plate, a sealing plate, and multiple arc-shaped support plates. The number of sliding support plates is equal to that of the fixed plates, and they correspond one-to-one. The sliding support plate is slidably connected to the corresponding fixed plate. The sealing plate is disposed on the top of the sliding support plate. An exhaust hole is provided on the pressurization chamber. The sealing plate is connected to the guide rail by a reset spring. The sealing plate is used to control the opening and closing of the exhaust hole. Multiple arc-shaped support plates are spaced apart on the sliding support plate. The number of arc-shaped support plates is equal to that of the hooks, and they correspond one-to-one. Each arc-shaped support plate is located inside the corresponding hook. A pressure relief valve is connected to the pressurization chamber.

[0022] Through the above technical solution, the user can continuously pressurize the two airbags during bench press exercises. As the exercise progresses, the pressure of the two airbags increases, which in turn increases the frictional force on the locking shaft, thereby slowing down the reset speed of the multiple locking plates. This can improve the sensitivity of the safety strap locking. When the user suddenly loses strength and loses control of the barbell, the barbell can be quickly locked and fixed.

[0023] Furthermore, the bench press support is equipped with fixed rods on both sides, and each fixed rod is equipped with multiple barbell plates. A bench is installed below the support column.

[0024] Through the above technical solution, the backrest angle of the bench can be adjusted, making it convenient for users to exercise in different lying positions, and can exercise different parts of the pectoral muscles.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] Firstly, this invention addresses the shortcomings of existing technologies in providing adequate protection for exercisers. It significantly enhances the protection of the exerciser, eliminating the need for adjustment of the protective frame before exercise. Specifically, it utilizes an inverted "U"-shaped connecting rod between the two barbells. Even if the two barbells accidentally fall, it effectively prevents pressure on the user's chest, maximizing the exerciser's safety. Furthermore, the locking mechanism secures the retractor, immediately locking the two barbells in the event of an accidental fall, further preventing injury and significantly improving the safety of this bench press machine.

[0027] Secondly, in this invention, the pressure of the airbag increases with each bench press, which in turn increases the friction between the arc-shaped friction plate and the locking shaft, thereby slowing down the reset speed of the multiple locking plates. At this time, the maximum allowable drop speed of the two barbell bars will gradually decrease with the increase of bench press repetitions, thereby improving the sensitivity of the safety strap locking. When the user suddenly loses control of the barbell bar, the barbell bar can be quickly locked and fixed, further ensuring the safety of this bench press device.

[0028] Thirdly, in this invention, by connecting a pressure relief valve to the pressurization chamber, the airbag can automatically release air when it reaches the maximum set pressure, thus preventing the airbag from being damaged due to excessive pressure. When the user completes a set of bench press exercises, the air in the airbag can be automatically released. This means that after each set of bench press exercises, the sensitivity of the safety strap locking will be reset, so that the sensitivity of the safety strap locking can always automatically and dynamically change with the user's exercise process.

[0029] Fourthly, in this invention, two guide rails can limit the movement of the two barbell bars. During bench press exercises, the barbell bars will move vertically to prevent them from tilting forward or backward, thus preventing them from losing control and further improving safety. Users can adjust the grip width according to their needs. Specifically, they can open the lock, pull the adjustable handle out of the barbell bar to an appropriate length, and then lock the lock. This allows users to achieve the ideal training effect while preventing injury from adjusting the grip.

[0030] Fifth, in this invention, after the user is in position, they only need to lift the two barbell bars slightly and then rotate them backwards simultaneously to remove them. After completing a set of bench press exercises, the user only needs to rotate the two barbell bars forwards simultaneously to hang them on the hooks at the corresponding heights. Compared with existing technologies, it is more convenient to pick up and put down the barbell bars.

[0031] Sixth, in this invention, when the user pushes the two barbell bars upwards, the coil spring will automatically retract the safety straps set on the reel, so that the safety straps are always taut during the user's exercise, and thus the safety straps can always provide effective tension to the barbell bars in the event of an accidental fall. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the safety strap structure in this invention;

[0034] Figure 3 This is a schematic diagram of the adjustable grip structure in this invention;

[0035] Figure 4 This is a schematic diagram of the connecting rod in this invention;

[0036] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0037] Figure 6 This is a schematic diagram of the winding support structure in this invention;

[0038] Figure 7 This is a schematic diagram of the toggle lever in this invention;

[0039] Figure 8 This is a schematic diagram of the airbag structure in this invention;

[0040] Figure 9 This is a schematic diagram of the hook structure in this invention;

[0041] Figure 10 for Figure 9 Enlarged view at point B in the middle;

[0042] Figure 11 This is a schematic diagram of the structure of the closed plate in this invention;

[0043] Figure 12 This is a schematic diagram of the arc-shaped support plate in this invention;

[0044] Figure 13 This is a schematic diagram of the latch structure in this invention;

[0045] Figure 14 This is a schematic diagram of the structure of the bench in this invention.

[0046] In the diagram: 1. Bench press support; 2. Support column; 3. Bench; 4. Connecting rod; 5. Barbell bar; 6. Fixing rod; 7. Barbell plates; 8. Adjustable grip; 9. Guide rail; 11. Safety strap; 12. Connecting slider; 13. Fixing plate; 14. Hook; 15. Limiting block; 16. Rotating ring; 17. Connecting plate; 18. Hanging rod; 19. Curved support plate; 21. Mounting plate; 22. Rewinding bracket; 23. Reel; 24. Coil spring; 25. 26. Actuating lever; 27. Locking shaft; 28. Counterweight plate; 29. ​​Locking plate; 30. Stop block; 31. Air guide block; 32. Airbag; 33. Arc-shaped friction plate; 34. Air guide pipe; 35. Z-shaped connecting rod; 36. Pressure boosting chamber; 37. Pressure boosting piston; 38. Air outlet; 39. Air inlet; 40. One-way valve; 41. Pressure relief valve; 42. Exhaust port; 43. Sealing plate; 44. Return spring; 45. Sliding support plate; 46. Locking buckle. Detailed Implementation

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1

[0051] In this embodiment of the invention, a bench press machine with automatic protection function is described in the following example. Figure 1 - Figure 13 It includes a bench press support 1, a support column 2 is provided on the top of the bench press support 1, and limit components are provided on both sides of the bench press support 1. A barbell assembly is movably mounted on the limit components. The barbell assembly includes two barbell bars 5 and a connecting rod 4 is provided between the two barbell bars 5. The connecting rod 4 has an inverted "U" shaped structure.

[0052] The automatic protection assembly includes two suspension components and two adaptive damping adjustment components. Each suspension component includes a safety strap 11, a winding component, and a locking component. The bottom of the safety strap 11 is connected to a barbell bar 5 via a rotating ring 16, and the top of the safety strap 11 is connected to a support column 2 via the winding component. The locking component is used to lock the winding component. Each adaptive damping adjustment component can adjust the reset speed of the locking component by adjusting the damping of the locking component.

[0053] By installing an inverted "U"-shaped connecting rod 4 between the two barbell bars 5, even if the two barbell bars 5 accidentally fall, it can effectively prevent compression of the user's chest, maximizing the safety of the exerciser. Unlike existing technologies, it eliminates the need for the exerciser to adjust the protective frame before exercise. The locking mechanism automatically locks the winding mechanism, immediately locking the two barbell bars 5 in the event of an accidental fall, further preventing injury to the user and significantly improving the safety of this bench press machine.

[0054] Specifically, the barbell assembly also includes guide rails 9 on both sides of the bench press support 1, with a connecting slider 12 slidably connected to each guide rail 9, each barbell bar 5 being rotatably connected to a connecting slider 12, an adjustable grip 8 slidably connected to each barbell bar 5, and a locking buckle 46 provided on each barbell bar 5.

[0055] Two guide rails 9 can limit the movement of the two barbell bars 5. During bench press exercises, the barbell bars 5 will move vertically to prevent them from tilting forward or backward, thus preventing them from losing control and further improving safety. Users can adjust the grip width according to their needs. Specifically, the lock 46 is opened, the adjustable grip 8 is pulled out of the barbell bar 5 to an appropriate length, and then the lock 46 is locked. This allows users to achieve the ideal training effect while preventing the adjustable grip 8 from causing injury to the user.

[0056] Specifically, each barbell bar 5 has a limiting block 15 on the side away from the adjusting handle 8, and each limiting block 15 is threadedly connected to an adjusting handle 8. Each barbell bar 5 has a connecting plate 17, and each connecting plate 17 has a hanging rod 18 on the side away from the barbell bar 5. The limiting assembly includes two fixing plates 13, which are spaced apart on the side wall of the bench press support 1. Each fixing plate 13 is vertically arranged, and each fixing plate 13 has multiple hooks 14 spaced apart. Each hanging rod 18 corresponds to multiple hooks 14 on the side closest to the hanging rod 18, and each hook 14 is used to suspend and support the hanging rod 18.

[0057] Once the user is in position, they only need to lift the two barbell bars 5 slightly and then rotate them backwards simultaneously to remove them. After completing a set of bench press exercises, the user only needs to rotate the two barbell bars 5 forwards simultaneously to hang them on the hooks 14 at the corresponding height. Compared with existing technology, it is more convenient to pick up and put down the barbell bars 5.

[0058] Specifically, each winding component includes a winding bracket 22, a reel 23, and a coil spring 24. The top of the winding bracket 22 is fixedly connected to the bottom of the support column 2. The reel 23 is rotatably connected to the winding bracket 22. One end of the coil spring 24 is fixedly connected to the winding bracket 22, and the other end of the coil spring 24 is fixedly connected to the reel 23. Each safety strap 11 corresponds to one reel 23, and the end of each safety strap 11 away from the rotating ring 16 is fixedly connected to the corresponding reel 23.

[0059] When the user pushes the two barbell bars 5 upwards, the coil spring 24 will automatically retract the safety strap 11 set on the reel 23, so that the safety strap 11 is always taut during the user's exercise, and thus the safety strap 11 can always provide effective tension to the barbell bars 5 in the event of an accidental fall.

[0060] Specifically, each locking component includes a mounting plate 21, a counterweight plate 27, and a locking shaft 26. The mounting plate 21 is fixedly connected to the bottom of the support column 2, and the locking shaft 26 is rotatably connected to the mounting plate 21. Multiple locking plates 28 are spaced apart on the outer wall of the locking shaft 26. The counterweight plate 27 is located on the side of the locking shaft 26 near the mounting plate 21. The locking component also includes multiple actuating rods 25 and stops 29. The multiple actuating rods 25 are evenly distributed along the circumference of the reel 23 on the outer wall of the reel 23. The multiple actuating rods 25 cooperate with the multiple locking plates 28. The stops 29 are located on the outer wall of the mounting plate 21 and cooperate with the uppermost locking plate 28.

[0061] When a user performs a bench press, the two barbell bars 5 descend intermittently at a slow speed. During this time, the reel 23 drives multiple levers 25 to slowly rotate counterclockwise. Because the reel 23 rotates slowly, each time a lever 25 pushes the stop 29 clockwise, the counterweight plate 27 quickly returns to its original position under the influence of gravity, without interfering with the rotation of the lever 25. However, when the user is exhausted and unable to effectively support the barbell bars 5, the descent speed of the barbell bars 5 will increase. At this time, the rotation speed of the reel 23 will also increase significantly. In this case, the locking plate 28 will not have time to return to its original position. The uppermost locking plate 28 will be blocked by the stop 29 and cannot continue to rotate. At this time, the lowermost locking plate 28 will lock the lever 25, thereby allowing the barbell bars 5 to stop falling quickly and protecting the user.

[0062] Specifically, each adaptive damping adjustment component includes an air guide block 30 and two air bags 31. The air guide block 30 is located at the bottom of the support column 2, and the two air bags 31 are spaced apart on both sides of the bottom of the air guide block 30. Each air bag 31 is provided with an arc-shaped friction plate 32 on the side near the locking shaft 26. Each guide rail 9 has a pressure chamber 35 inside, and a pressure piston 36 is slidably connected in the pressure chamber 35. The number of pressure pistons 36 and connecting sliders 12 are equal and correspond one-to-one. Each pressure piston 36 is connected to the connecting slider 12 through a Z-shaped connecting rod 34. An air inlet 38 and an air outlet 37 are spaced apart on the pressure chamber 35. A one-way valve 39 is provided on the air inlet 38 and the air outlet 37. The air outlet 37 is connected to the two air bags 31 through an air guide pipe 33.

[0063] As the user performs bench press exercises, their physical strength gradually decreases, and the falling speed of the barbell bars 5 slowly increases. The risk of the two barbell bars 5 falling also gradually increases. During bench press exercises, the pressure piston 36 reciprocates in the pressure chamber 35, drawing in outside air through the air inlet 38 and guiding it into the air bladder 31 through the air tube 33. Each time the user performs a bench press, the pressure in the air bladder 31 increases, thereby increasing the friction between the arc-shaped friction plate 32 and the locking shaft 26. This slows down the reset speed of the multiple locking plates 28. At this time, the maximum allowable falling speed of the two barbell bars 5 gradually decreases with the increase of bench press repetitions, thereby improving the sensitivity of the safety strap 11 locking. When the user suddenly loses control of the barbell bars 5, the barbell bars 5 can be quickly locked and fixed, further ensuring the safety of this bench press machine.

[0064] Specifically, each adaptive damping adjustment component also includes a reset component, which includes a sliding support plate 45, a sealing plate 42, and multiple arc-shaped support plates 19. The number of sliding support plates 45 and fixed plates 13 are equal and correspond one-to-one. The sliding support plate 45 is slidably connected to the corresponding fixed plate 13. The sealing plate 42 is set on the top of the sliding support plate 45. The pressure chamber 35 is provided with an exhaust hole 41. The sealing plate 42 is connected to the guide rail 9 through a reset spring 44. The sealing plate 42 is used to control the opening and closing of the exhaust hole 41. Multiple arc-shaped support plates 19 are spaced apart on the sliding support plate 45. The number of arc-shaped support plates 19 and hooks 14 are equal and correspond one-to-one. Each arc-shaped support plate 19 is located inside the corresponding hook 14. A pressure relief valve 40 is connected to the pressure chamber 35.

[0065] By connecting a pressure relief valve 40 to the pressure chamber 35, the airbag 31 can automatically release air when it reaches the maximum set pressure, preventing damage due to excessive pressure. When the user completes a set of bench press exercises, the barbell 5 is placed on the corresponding hook 14 for a short rest. At this time, the barbell 5 will press down on the arc-shaped support plate 19, thereby driving the sealing plate 42 to descend through the sliding support plate 45, opening the exhaust port 41 on the pressure chamber 35 and quickly expelling the air from the airbag 31. This ensures that the sensitivity of the safety strap 11 is reset after each set of bench press exercises, so that the sensitivity of the safety strap 11 can always automatically and dynamically change with the user's exercise process. When the user removes the barbell 5 from the hook 14 each time, the sealing plate 42 will close the exhaust port 41 on the pressure chamber 35 under the action of the return spring 44.

[0066] Example 2

[0067] A bench press machine with automatic protection function includes a bench press frame 1, a support column 2 is provided on the top of the bench press frame 1, and limit components are provided on both sides of the bench press frame 1. A barbell assembly is movably mounted on the limit components. The barbell assembly includes two barbell bars 5 and a connecting rod 4 is provided between the two barbell bars 5. The connecting rod 4 has an inverted "U" shaped structure.

[0068] The automatic protection assembly includes two suspension components and two adaptive damping adjustment components. Each suspension component includes a safety strap 11, a winding component, and a locking component. The bottom of the safety strap 11 is connected to a barbell bar 5 via a rotating ring 16, and the top of the safety strap 11 is connected to a support column 2 via the winding component. The locking component is used to lock the winding component. Each adaptive damping adjustment component can adjust the reset speed of the locking component by adjusting the damping of the locking component.

[0069] Unlike Example 1, please refer to... Figure 1 - Figure 2 as well as Figure 14 Furthermore, the bench press support 1 has fixed bars 6 on both sides, and each fixed bar 6 has multiple barbell plates 7. A bench 3 is installed below the support column 2.

[0070] The backrest angle of the bench 3 is adjustable, allowing users to exercise in different lying positions and target different parts of the chest muscles. The bench 3 can also be removed, allowing users to perform squat training with this bench press machine.

[0071] The working principle of this invention is as follows: After the user lies supine on the bench 3, he / she only needs to lift the two barbell bars 5 slightly and then rotate the two barbell bars 5 backward at the same time to remove the barbell bars 5. After the user completes a set of bench press training, he / she only needs to rotate the two barbell bars 5 forward at the same time to hang the two barbell bars 5 on the hooks 14 at the corresponding height. Compared with the prior art, it is more convenient to pick up and put down the barbell bars 5.

[0072] When a user performs a bench press, the two barbell bars 5 descend intermittently at a slow speed. During this time, the reel 23 drives multiple levers 25 to slowly rotate counterclockwise. Because the reel 23 rotates slowly, each time a lever 25 pushes the stop 29 clockwise, the counterweight plate 27 quickly returns to its original position under the influence of gravity, without interfering with the rotation of the lever 25. However, when the user is exhausted and unable to effectively support the barbell bars 5, the descent speed of the barbell bars 5 will increase. At this time, the rotation speed of the reel 23 will also increase significantly. In this case, the locking plate 28 will not have time to return to its original position. The uppermost locking plate 28 will be blocked by the stop 29 and cannot continue to rotate. At this time, the lowermost locking plate 28 will lock the lever 25, thereby allowing the barbell bars 5 to stop falling quickly and protecting the user.

[0073] As the user performs bench press exercises, their physical strength gradually decreases, and the falling speed of the barbell bars 5 slowly increases. The risk of the two barbell bars 5 falling also gradually increases. During bench press exercises, the pressure piston 36 reciprocates in the pressure chamber 35, drawing in outside air through the air inlet 38 and guiding it into the air bladder 31 through the air tube 33. Each time the user performs a bench press, the pressure in the air bladder 31 increases, thereby increasing the friction between the arc-shaped friction plate 32 and the locking shaft 26. This slows down the reset speed of the multiple locking plates 28. At this time, the maximum allowable falling speed of the two barbell bars 5 gradually decreases with the increase of bench press repetitions, thereby improving the sensitivity of the safety strap 11 locking. When the user suddenly loses control of the barbell bars 5, the barbell bars 5 can be quickly locked and fixed, further ensuring the safety of this bench press machine.

[0074] By connecting a pressure relief valve 40 to the pressurization chamber 35, the airbag 31 can automatically release air when it reaches the maximum set pressure, preventing damage due to excessive pressure. When the user completes a set of bench press exercises, the barbell 5 is placed on the corresponding hook 14 for a short rest. At this time, the barbell 5 will press down on the arc-shaped support plate 19, thereby driving the sealing plate 42 to descend through the sliding support plate 45, opening the exhaust port 41 on the pressurization chamber 35 and quickly expelling the air from the airbag 31. This ensures that the sensitivity of the safety strap 11 is reset after each set of bench press exercises, so that the sensitivity of the safety strap 11 can always automatically and dynamically change with the user's exercise process.

[0075] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bench press machine with automatic protection function, comprising a bench press support (1), characterized in that, The top of the bench press support (1) is provided with a support column (2), and both sides of the bench press support (1) are provided with limit components. A barbell assembly is movably provided on the limit component. The barbell assembly includes two barbell bars (5) and a connecting rod (4) is provided between the two barbell bars (5). The connecting rod (4) has an inverted "U" shaped structure. An automatic protection assembly includes two suspension components and two adaptive damping adjustment components. Each suspension component includes a safety strap (11), a winding component, and a locking component. The bottom of the safety strap (11) is connected to a barbell bar (5) via a rotating ring (16), and the top of the safety strap (11) is connected to the support column (2) via the winding component. The locking component is used to lock the winding component. Each adaptive damping adjustment component can adjust the reset speed of the locking component by adjusting the damping of the locking component. The barbell assembly also includes guide rails (9) on both sides of the bench press support (1), each guide rail (9) is slidably connected to a connecting slider (12), each barbell bar (5) is rotatably connected to a connecting slider (12), each locking component includes a mounting plate (21), a counterweight plate (27) and a locking shaft (26), and the limiting assembly includes two fixing plates (13), each fixing plate (13) is provided with multiple hooks (14) at intervals; Each of the adaptive damping adjustment components includes an air guide block (30) and two air bladders (31). The air guide block (30) is located at the bottom of the support column (2), and the two air bladders (31) are spaced apart on both sides of the bottom of the air guide block (30). Each air bladder (31) has an arc-shaped friction plate (32) on the side near the locking shaft (26). Each guide rail (9) has a pressure chamber (35) inside, and a pressure piston is slidably connected inside the pressure chamber (35). 36), the number of pressurizing pistons (36) and connecting sliders (12) are equal and correspond one-to-one. Each pressurizing piston (36) and connecting slider (12) are connected by a Z-shaped connecting rod (34). The pressurizing chamber (35) is provided with an air inlet (38) and an air outlet (37) spaced apart. Both the air inlet (38) and the air outlet (37) are provided with a one-way valve (39). The air outlet (37) is connected to the two airbags (31) through an air guide tube (33). Each of the adaptive damping adjustment components also includes a reset component, which includes a sliding support plate (45), a sealing plate (42), and multiple arc-shaped support plates (19). The number of sliding support plates (45) and fixed plates (13) are equal and correspond one-to-one. The sliding support plate (45) is slidably connected to the corresponding fixed plate (13). The sealing plate (42) is disposed on the top of the sliding support plate (45). An exhaust port (41) is provided on the pressurization chamber (35). The sealing plate (42) is connected to the guide rail (9) by a reset spring (44). The sealing plate (42) is used to control the opening and closing of the exhaust port (41). Multiple arc-shaped support plates (19) are spaced apart on the sliding support plate (45). The number of arc-shaped support plates (19) and hooks (14) are equal and correspond one-to-one. Each arc-shaped support plate (19) is located inside the corresponding hook (14). A pressure relief valve (40) is connected to the pressure chamber (35).

2. A bench press machine with automatic protection function according to claim 1, characterized in that, Each of the barbell bars (5) is slidably connected to an adjustable grip (8), and each of the barbell bars (5) is provided with a buckle (46).

3. A bench press machine with automatic protection function according to claim 2, characterized in that, Each barbell bar (5) has a limit block (15) on the side away from the adjusting grip (8), each limit block (15) is threaded to an adjusting grip (8), each barbell bar (5) has a connecting plate (17), and each connecting plate (17) has a hanging rod (18) on the side away from the barbell bar (5).

4. A bench press machine with automatic protection function according to claim 3, characterized in that, The two fixing plates (13) are spaced apart on the side wall of the bench press support (1). Each fixing plate (13) is vertically arranged. Each hanging rod (18) corresponds to multiple hooks (14) on the side of the hanging rod (18). Each hook (14) is used to suspend and support the hanging rod (18) corresponding to the hook (14).

5. A bench press machine with automatic protection function according to claim 1, characterized in that, Each of the winding components includes a winding bracket (22), a spool (23), and a coil spring (24). The top of the winding bracket (22) is fixedly connected to the bottom of the support column (2). The spool (23) is rotatably connected to the winding bracket (22). One end of the coil spring (24) is fixedly connected to the winding bracket (22), and the other end of the coil spring (24) is fixedly connected to the spool (23). Each safety strap (11) corresponds to a spool (23), and the end of each safety strap (11) away from the rotating ring (16) is fixedly connected to the corresponding spool (23).

6. A bench press machine with automatic protection function according to claim 5, characterized in that, The mounting plate (21) is fixedly connected to the bottom of the support column (2), the locking shaft (26) is rotatably connected to the mounting plate (21), a plurality of locking plates (28) are spaced apart on the outer wall of the locking shaft (26), and the counterweight plate (27) is located on the side of the locking shaft (26) near the mounting plate (21).

7. A bench press machine with automatic protection function according to claim 6, characterized in that, The locking component also includes a plurality of levers (25) and a stop (29). The plurality of levers (25) are evenly distributed on the outer wall of the reel (23) along the circumferential direction of the reel (23). The plurality of levers (25) cooperate with the structure of the plurality of locking plates (28). The stop (29) is disposed on the outer wall of the mounting plate (21). The stop (29) cooperates with the structure of the uppermost locking plate (28).

8. A bench press machine with automatic protection function according to claim 1, characterized in that, The bench press support (1) has fixed rods (6) on both sides, and each fixed rod (6) has multiple barbell plates (7). A bench (3) is provided below the support column (2).

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