Assisted adjustable pull-up device and progressive pull-up training system

Abstract

This invention discloses an adjustable pull-up assist device and a progressive pull-up training system. The adjustable pull-up assist device includes a portal frame consisting of two upright arms and a crossbar between them; an assist rod located between the lower ends of the two upright arms, with both ends of the assist rod vertically connected to the upright arms; a four-pulley system; a slider slidably connected to the upright arms; a lever hinged to the slider; and a crossarm at the outer end of the lever to suspend a counterweight or a person performing the counterweight exercise. The downward pulling force generated by the counterweight or the person performing the counterweight exercise moves the assist rod upward through the four-pulley system, providing assistance for the pull-up. This invention provides upward assistance to the pull-up performer, helping them complete the full pull-up motion, thereby exercising the relevant muscle groups. The counterweight is gradually reduced until a standard pull-up can be performed without any counterweight.

Description

Technical Field

[0001] This invention relates to a pull-up exercise device, and more specifically to an adjustable pull-up assist device and a progressive pull-up training system. Background Technology

[0002] In existing technologies, when an exerciser's physical ability is insufficient to complete a standard pull-up, their confidence diminishes significantly, leading to a lack of a sense of accomplishment and making it difficult to continue practicing. Therefore, resistance bands have been developed as an auxiliary tool to help exercisers complete this movement. However, the lower end of the resistance band cannot be fixed, meaning that the assistance provided diminishes as the exerciser's body rises. The inventors also believe that when used in public places or on school grounds, the resistance band is easily damaged by pulling or playing with.

[0003] Another type of pull-up assist device uses multiple counterweights to provide upward assistance to the exerciser. This structure is often found in gyms, but it is more complex and expensive. Furthermore, gym pull-up assist devices use metal blocks as counterweights, which can easily lead to accidents when used in public places or on campuses due to inadequate supervision.

[0004] Therefore, the inventors believe it is necessary to develop and design a new adjustable pull-up assist device and a progressive pull-up training system. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing an adjustable pull-up assist device and a progressive pull-up training system. It utilizes the weight of other athletes or items such as backpacks as counterweights, which is both low-cost and fun, and can effectively encourage pull-up participants to perform pull-ups.

[0006] The objective of this invention is achieved through the following technical solutions:

[0007] The present invention provides an adjustable pull-up assist device, comprising a portal frame, the portal frame comprising two vertical arm structures and a crossbar disposed between the upper ends of the two vertical arm structures;

[0008] It also includes a booster rod located between the lower ends of the two boom structures.

[0009] The two ends of the assist rod are movably connected to the upright arm structure; a support block is provided in the middle of the assist rod to provide auxiliary support for the pull-up exerciser;

[0010] At least one of the boom structures is equipped with a four-pulley system, which includes two movable pulleys, a main rope, two fixed pulleys, an intermediate rope, and a secondary rope. The movable pulleys include a lower movable pulley and an upper movable pulley. The fixed pulleys include a lower fixed pulley and an upper fixed pulley. The fixed end of the main rope is fixed to the lower end of the boom structure, and the movable end of the main rope passes over the lower movable pulley and is fixedly connected to the end of the assist rod. The spindle of the lower movable pulley is fixedly connected to the lower end of the intermediate rope, and the upper end of the intermediate rope passes over the upper fixed pulley located at the upper end of the boom structure, extends downward, then passes over the upper movable pulley and extends upward to be fixedly connected to the upper end of the boom structure.

[0011] And, a slider that is slidably connected to the vertical arm structure, the lower end of the slider being connected to one end of the secondary rope, and the other end of the secondary rope being fixedly connected to the spindle of the upper movable pulley after passing around the lower fixed pulley;

[0012] A lever hinged to the slider, the inner end of the lever being hinged to the slider, and the outer end of the lever having a cross arm for suspending a counterweight or a counterweight operator;

[0013] A support arm is hinged to the middle section of the lever, the upper end of the support arm is hinged to the middle section of the lever, and the lower end of the support arm is hinged to the outer side of the upright arm structure.

[0014] The downward pulling force generated by the counterweight or the person moving it generates a counterforce through the lever, causing the slider to move upward. The slider then pulls the secondary rope, causing the upper moving pulley to move downward. The downward movement of the upper moving pulley causes the lower end of the middle rope to move upward at twice the speed of the slider. The lower end of the middle rope generates an upward lifting force on the lower moving pulley, causing the movable end of the main rope to drive the assist rod to move upward at four times the speed of the slider.

[0015] Preferably, the hinge point between the support arm and the lever is located in the middle section between the cross arm and the inner end of the lever; a spring tension gauge with a display interface facing outward is provided between the slider and the secondary rope to display the actual counterweight force in digital or pointer mode.

[0016] Preferably, the outer end of the lever is provided with a telescopic structure to adjust the distance between the cross arm and the hinge point.

[0017] Preferably, the telescopic structure is a spiral structure, with the cross arm fixedly connected to the screw, and a nut seat provided at the outer end of the lever; or, the telescopic structure is a sliding structure, and is provided with a locking cam and a handle connected thereto.

[0018] Preferably, the outer side of the vertical arm structure is provided with a foot support position located on the lower side of the horizontal arm, providing a foot support position for the weightlifter.

[0019] Preferably, there are two sliders, two levers, and the cross arm is located between the outer ends of the two levers. The person doing the weight exercise and the person doing the pull-up exercise are in opposite directions or in the same direction.

[0020] Alternatively, there may be one slider, with two intermediate ropes generating power through the same upper pulley; the intermediate ropes away from the slider may pass through the middle or top of the crossbar.

[0021] The present invention provides an adjustable pull-up assist device, comprising a portal frame, the portal frame comprising two vertical arm structures and a crossbar disposed between the upper ends of the two vertical arm structures;

[0022] It also includes a booster rod located between the lower ends of the two boom structures.

[0023] The two ends of the assist rod are movably connected to the upright arm structure; a support block is provided in the middle of the assist rod to provide auxiliary support for the pull-up exerciser;

[0024] The boom structure is equipped with a dual-mode pulley system, which includes three movable pulleys, one load-reducing main rope, one load-increasing main rope, four fixed pulleys, one load-reducing intermediate rope, one load-increasing intermediate rope, and one secondary rope. The movable pulleys include a lower load-reducing movable pulley, a lower load-increasing movable pulley, and an upper movable pulley. The fixed pulleys include a lower fixed pulley, an upper fixed pulley, a load-reducing fixed pulley, and a load-increasing fixed pulley. The boom structure includes a main boom structure and a secondary boom structure.

[0025] The fixed end of the main shearing rope is fixed to the lower end of the main boom structure, and the movable end of the main shearing rope is fixedly connected to the end of the assist rod after passing upward around the lower shearing pulley. The spindle of the lower shearing pulley is fixedly connected to the lower end of the intermediate shearing rope, and the upper end of the intermediate shearing rope passes over the fixed shearing pulley and the upper fixed pulley located at the upper end of the main boom structure, extends downward, passes over the upper movable pulley, extends upward, and is fixedly connected to the upper end of the main boom structure.

[0026] One end of the main force-enhancing rope is fixed to the assist rod, and the other end is fixed to the spindle of the lower force-enhancing pulley; one end of the intermediate force-enhancing rope is fixed to the upper end of the auxiliary boom structure, and the other end passes through the lower force-enhancing pulley, the fixed force-enhancing pulley and the upper fixed pulley located at the upper end of the auxiliary boom structure, extends downward, passes through the upper movable pulley, extends upward, and is fixedly connected to the upper end of the main boom structure.

[0027] A mode switching mechanism is provided between the spindle of the lower force-reducing pulley and the lower end of the intermediate force-reducing rope; when the mode switching mechanism is open, the spindle of the lower force-reducing pulley and the lower end of the intermediate force-reducing rope are in a movable connection state, and the spring between them is stretched when an external force is applied and retracted when no external force is applied; when the mode switching mechanism is closed, the spindle of the lower force-reducing pulley and the lower end of the intermediate force-reducing rope are in a fixed connection state.

[0028] And, a slider that is slidably connected to the vertical arm structure, the lower end of the slider being connected to one end of the secondary rope, and the other end of the secondary rope being fixedly connected to the spindle of the upper movable pulley after passing around the lower fixed pulley;

[0029] A lever hinged to the slider, the inner end of the lever being hinged to the slider, and the outer end of the lever having a cross arm for suspending a counterweight or a counterweight operator;

[0030] A support arm is hinged to the middle section of the lever, the upper end of the support arm is hinged to the middle section of the lever, and the lower end of the support arm is hinged to the outer side of the upright arm structure.

[0031] When the mode switching mechanism is closed, the downward pulling force generated by the counterweight or the counterweight mover generates a reverse force through the lever, causing the slider to move upward. The slider then pulls the secondary rope, causing the upper moving pulley to move downward. The downward movement of the upper moving pulley causes the lower ends of the reducing and increasing intermediate ropes to move upward at twice the speed of the slider. The lower end of the reducing intermediate rope generates an upward lifting force on the reducing lower moving pulley, causing the movable end of the reducing main rope to drive the assist rod to move upward at four times the speed of the slider. The lower end of the increasing intermediate rope generates an upward lifting force on the increasing lower moving pulley, causing the spindle of the increasing lower moving pulley and the increasing main rope to drive the assist rod to move upward at one time the speed of the slider, thereby putting the increasing main rope in a non-stressed state, which is the reducing working mode.

[0032] When the mode switching mechanism is activated, the downward pulling force generated by the counterweight or the person moving it generates a counterforce through the lever, causing the slider to move upward. The slider then pulls the secondary rope, causing the upper pulley to move downward. The downward movement of the upper pulley causes the lower ends of the reducing and increasing intermediate ropes to move upward at twice the speed of the slider. The lower end of the reducing intermediate rope pulls the spring, generating an upward lifting force on the reducing lower pulley equal to the spring force. The lower end of the increasing intermediate rope generates an upward lifting force on the increasing lower pulley, causing the spindle of the increasing lower pulley and the increasing main rope to drive the assist rod to move upward at once the speed of the slider. At this time, the system is in the increasing mode.

[0033] Preferably, the mode switching mechanism includes a pulley seat for fixing the reducing lower movable pulley, a spring fixing pin and a rotating shaft disposed within the pulley seat, and a movable block disposed between the spring and the reducing intermediate rope; the rotating shaft passes through the movable block; the pulley seat has a hollow groove and sliding grooves on both sides of the hollow groove, and the reducing lower movable pulley is fixed at the lower end of the hollow groove; the bottom of the sliding groove has an arc groove with a diameter greater than the width of the sliding groove; the rotating shaft corresponds to the sliding groove. A flat, arc-shaped bushing is fixedly connected to the device. The arc segment of the flat, arc-shaped bushing mates with the arc groove, and the flat segment mates with the sliding groove. When the tension of the spring causes the flat, arc-shaped bushing to slide into the arc groove, rotating the knob at the outer end of the rotating shaft so that the flat segment of the flat, arc-shaped bushing is perpendicular to the sliding groove, the mode switching mechanism is in the closed state. Rotating the knob so that the flat segment of the flat, arc-shaped bushing is parallel to the sliding groove, the mode switching mechanism is in the open state.

[0034] The present invention provides a progressive pull-up training system, which employs the aforementioned adjustable pull-up assist device. The handle position of the horizontal bar and the support position of the assist bar are respectively equipped with an upper force sensor and a lower force sensor to detect the pulling force at the upper end and the supporting force at the lower end of the pull-up exerciser. It also includes a control circuit connected to the upper force sensor and the lower force sensor, as well as a power supply circuit, control buttons, and a display screen connected to the control circuit.

[0035] Preferably, the system further includes a locking mechanism located at the lower end or side of the slider, and an unlocking mechanism for releasing the locked state. The control circuit is also connected to a locking identification circuit and an identity identification circuit. After the pull-up exerciser is identified by RFID identification or QR code identification, the exercise time and / or billing are performed.

[0036] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention, through its lever and pulley system, utilizes the counterweight provided by the pull-up athlete or an object (such as a backpack) to provide upward assistance, helping the athlete complete the full pull-up movement. This, in turn, exercises the relevant muscle groups involved in the pull-up. The counterweight is gradually reduced until a standard pull-up can be completed without any counterweight. Furthermore, using a pull-up athlete or an object (such as a backpack) as counterweight reduces the risk of collisions with hard objects, as is often seen with metal counterweights. When using a four-pulley system, it is suitable to use a pull-up athlete as counterweight, i.e., an athlete with a weight similar to the pull-up athlete. While acting as counterweight, the athlete is also performing a suspension exercise, achieving two benefits at once. When using a dual-mode pulley system, the mode can be switched using a mode switching mechanism. When closed, it is in a force reduction mode, which can use the weighted exerciser (also known as a suspended exerciser) to generate counterweight for assistance. When open, it is in a force increase mode, which can use a weighted object (such as a schoolbag or backpack) to generate counterweight for assistance. Attached Figure Description

[0037] Figure 1 The schematic diagram of the mechanism of a specific embodiment of the adjustable pull-up device of the present invention (four-pulley system embodiment);

[0038] Figure 1A for Figure 1 A partial view of the positions of the levers and sliders in the image;

[0039] Figure 2 This is a schematic diagram of a specific embodiment two of the adjustable pull-up assist device of the present invention (also using...). Figure 1 The four-pulley system in the main arm structure is made of three square tubes fixedly connected together.

[0040] Figure 3 for Figure 2 A top view (partial view of the horizontal arm position);

[0041] Figure 4 for Figure 2 Enlarged view of part A in the image;

[0042] Figure 5 for Figure 2 Enlarged view of part B in the image;

[0043] Figure 5A for Figure 2 A magnified view of the location of the support block in the image;

[0044] Figure 6 for Figure 5 CC partial view in the middle;

[0045] Figure 7 A partial view of the main support arm structure at the locking mechanism position in a specific embodiment of the adjustable pull-up device of the present invention, in the third embodiment of the present invention.

[0046] Figure 8 for Figure 7 A partial view of the locations of the locking plate and unlocking block;

[0047] Figure 8A A partial view of the locations of the locking plate and unlocking block in an embodiment with a glove rental function;

[0048] Figure 9 The schematic diagram of the mechanism of the fourth specific embodiment of the adjustable pull-up device of the present invention (dual-mode pulley system embodiment);

[0049] Figure 10 for Figure 9 A schematic diagram of the mode switching mechanism in the embodiment (open state);

[0050] Figure 11 for Figure 10 The left view;

[0051] Figure 12 for Figure 9 A schematic diagram of the mode switching mechanism in the embodiment (closed state);

[0052] Figure 13 This is a block diagram illustrating a specific embodiment of the progressive pull-up training system of the present invention.

[0053] Figure 14 This is a block diagram illustrating another specific embodiment of the progressive pull-up training system of the present invention (with a glove rental function).

[0054] Figure Labels

[0055] 10 Main boom 101 Inner square tube

[0056] 1010 Assist groove 102 Intermediate square tube

[0057] 103 Outer square tube 1030 through groove

[0058] 1031 Support rod 1032 Raised edge

[0059] 104 Upper fixing plate 105 Lower fixing plate

[0060] 106 Locking plate 1064 Locking hook hole

[0061] 1061 Hinge 1062 Electronic Tag

[0062] 1063 Magnetic connecting groove 107 Locking hook block

[0063] 1071 Lock Hook 108 Unlock Block

[0064] 1081 Unlocking Electromagnet; 1082 Locking Recognition Circuit

[0065] 109 Gloves 1091 Protrusion

[0066] 20 auxiliary booms, 200mm power assist slots

[0067] 201 Upper fixed pulley; 202 Lower moving pulley

[0068] 203 Secondary main rope; 204 Secondary intermediate rope

[0069] 21 Upper fixing plate 22 Lower fixing plate

[0070] 30 crossbar, 40 assist bar

[0071] 41 Support block 42 Positioning post

[0072] 43 Adjusting column 430 Through hole

[0073] 44 Adjusting pin 45 Connecting plate

[0074] 46 Bearing housing 47 Bearing

[0075] 48 Main rope connecting block 70 Mode switching mechanism

[0076] 700 Pulley seat, 701 Spring

[0077] 702 Spring lower retaining pin; 703 Rotating shaft

[0078] 7031 Flat Arc Bushing, 704 Movable Block

[0079] 705 Hollow Groove 706 Slide Groove

[0080] 7061 Circular groove; 711 Weakening main rope

[0081] 712 Main rope for increasing strength; 713 Intermediate rope for decreasing strength.

[0082] 714 Strengthening intermediate rope; 715 Secondary rope

[0083] 721 Reducer pulley, 7210 spindle

[0084] 722 Lower moving pulley for increasing force; 723 Upper moving pulley

[0085] 731 Lower fixed pulley 732 Upper fixed pulley

[0086] 733 Reducer fixed pulley; 734 Increaser fixed pulley

[0087] 811 Main rope 812 Intermediate rope

[0088] 813th rope, 821st lower pulley

[0089] 822 Upper moving pulley; 831 Lower fixed pulley

[0090] 832 Upper fixed pulley 84 Sliding block

[0091] 841 Slide rail 85 Lever

[0092] 851 Telescopic tube 852 Locking cam

[0093] 853 Handle 86 Crossarm

[0094] 87-arm 90-degree training system

[0095] 91 Upper force sensor 92 Lower force sensor

[0096] 94 Control Circuit 941 Power Supply Circuit

[0097] 942 Control Buttons 943 Display Screen

[0098] 944 Unlocking electromagnet; 945 Speaker

[0099] 99 Spring tension gauge Detailed Implementation

[0100] The technical solution of the present invention will be clearly and completely described below through the following embodiments. Obviously, the embodiments described below 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0101] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0102] It should also be understood that the terminology used in this specification of embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the invention. As used in this specification of embodiments of the invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0103] Figures 1 to 8 In the specific embodiment of the adjustable pull-up assist device of the present invention shown, a four-pulley system is used. The adjustable pull-up assist device of the present invention includes a portal frame, which includes two upright arm structures (specifically, a main upright arm 10 and a secondary upright arm 20), and a crossbar 30 disposed between the upper ends of the two upright arm structures. The main upright arm 10 is formed by three square tubes: an inner square tube 101, a middle square tube 102, and an outer square tube 103, which are fixedly connected. The secondary upright arm 20 is composed of a single square tube.

[0104] It also includes an assist rod 40 located between the lower ends of the two upright structures. The two ends of the assist rod 40 are connected to the upright structure (i.e., the inner square tube 101 and the inner side of the auxiliary upright 20) in an up-down movable manner. A support block 41 is provided in the middle of the assist rod to provide auxiliary support for the pull-up exerciser.

[0105] The main boom 10 is equipped with a four-pulley system, which includes two movable pulleys located within the main boom 10, a main rope 811, two fixed pulleys, an intermediate rope 812, and a secondary rope 813. The movable pulleys include a lower movable pulley 821 and an upper movable pulley 822; the fixed pulleys include a lower fixed pulley 831 and an upper fixed pulley 832. The fixed end of the main rope 811 is fixed to the lower end of the inner square tube 101 within the main boom structure. The movable end passes over the lower movable pulley 821 and is fixedly connected to the end of the assist rod 40; the spindle of the lower movable pulley 821 is fixedly connected to the lower end of the intermediate rope 812; the upper end of the intermediate rope 812 passes over the upper fixed pulley 832 located at the upper end of the upright arm structure (i.e., the top between the inner square tube 101 and the intermediate square tube 102) and extends downwards, then passes over the upper movable pulley 822 and extends upwards to be fixedly connected to the upper end of the upright arm structure (i.e., the top of the intermediate square tube 102);

[0106] And, the slider 84 is slidably connected to the main support structure (specifically the slide rail 841 provided on the upper inner wall of the outer square tube 103). The lower end of the slider 84 is connected to one end of the secondary rope 813, and the other end of the secondary rope 813 passes around the lower fixed pulley 831 fixed between the outer square tube 103 and the middle square tube 102 and is fixedly connected to the spindle of the upper movable pulley 822.

[0107] A lever 85 is hinged to a slider 84, with its inner end hinged to the slider 84 and its outer end provided with a cross arm 86 to suspend a counterweight or a counterweight operator.

[0108] The upper end of the support arm 87 is hinged to the middle section of the lever 85, and the lower end of the support arm 87 is hinged to the outer side of the vertical arm structure (i.e. the outer side of the outer square tube 103).

[0109] To provide balance assistance, an upper fixed pulley 201 is provided at the upper end of the secondary arm 20, and an lower movable pulley 202, a secondary intermediate rope 204, and a secondary main rope 203 are provided in the inner cavity. The fixed end of the secondary main rope 203 is fixed to the lower end of the secondary arm 20, and the movable end of the secondary main rope 203 passes around the lower movable pulley 202 and is fixedly connected to the other end of the assist rod 40. The spindle of the lower movable pulley 202 is fixedly connected to the lower end of the secondary intermediate rope 204. The upper end of the secondary intermediate rope 204 passes around the upper fixed pulley 201 at the upper end of the secondary arm 20, passes through the central through hole of the crossbar 30, passes through the upper fixed pulley 832, extends downward, passes around the upper movable pulley 822, and extends upward to be fixedly connected to the upper end of the arm structure (i.e., the top of the middle square tube 102).

[0110] The downward pulling force generated by the counterweight or the person performing the counterweight movement generates a counterforce through lever 85, causing slider 84 to move upward. Slider 84 then pulls the secondary rope, causing upper moving pulley 822 to move downward. The downward movement of upper moving pulley 822 causes the lower ends of intermediate rope 812 and secondary intermediate rope 204 to move upward at twice the speed of slider. The lower ends of intermediate rope 812 and secondary intermediate rope 204 generate an upward lifting force on lower moving pulley 821 and secondary lower moving pulley 202, causing the movable ends of main rope 811 and secondary main rope 203 to drive the assist rod to move upward at four times the speed of slider.

[0111] More specifically, the hinge point between the support arm 87 and the lever 85 is located in the middle section between the cross arm 86 and the inner end of the lever 85; a spring tension gauge 99 with a display interface facing outward is provided between the slider 84 and the secondary rope 813 to display the actual counterweight force in digital or pointer mode. The counterweight user can adjust the magnitude of the counterweight force by adjusting the suspension position.

[0112] More specifically, the outer end of lever 85 is equipped with a telescopic structure to adjust the distance between the crossarm and the hinge point. For example... Figure 1 As shown, the telescopic structure is a sliding structure (i.e., a sliding telescopic tube 851), and is equipped with a locking cam 852 and a handle 853 connected thereto. When the handle 853 is tightened, the locking cam 852 presses against the sliding connection between the telescopic tube 851 and the lever 85, thereby fixing the two in place.

[0113] More specifically, the outer side of the upright arm structure (i.e., the lower part of the outer side of the outer square tube 103) is provided with multiple foot positions at different heights located on the side below the horizontal arm (i.e., foot rods 1031 in the figure), providing foot support positions for the weightlifter and adjusting the counterweight force according to different foot positions.

[0114] More specifically, Figure 3As shown, the horizontal arm 86A is arc-shaped, making it convenient for the suspended athlete to adjust the position of the grip to adjust the counterweight; the assist rod 40 can also be made of square tubing. Figure 5A As shown, the support block 41 is adjusted to the height of the assist rod 40 by two positioning posts 42 and one adjusting post 43. The adjusting post 43 is provided with multiple through holes 430. The adjusting pin 44 passes through the adjusting hole provided in the assist rod 40 and then through the through hole 430 on the matching adjusting post 43 to adjust the height of the support block 41 to accommodate pull-up exercisers of different heights.

[0115] like Figure 2 , Figure 4 and Figure 5 As shown, the three square tubes constituting the main support arm 10—the inner square tube 101, the middle square tube 102, and the outer square tube 103—are fixedly connected by a threaded connection between the upper fixing plate 104 and the lower fixing plate 105. The upper and lower ends of the auxiliary support arm 20 also have upper fixing plates 21 and lower fixing plates 22. The lower fixing plates 105 and 22 are provided with anchor bolt holes for fixed connection to the ground or other fixed objects. The upper section of the outer square tube 103 has a through groove 1030 for the lever 85 to pass through. The inner lower sections of the inner square tube 101 and the auxiliary support arm 20 have assist grooves 1010 and 200 for the assist rod 40 to pass through.

[0116] To reduce friction and noise, and to provide stable assistance, a bearing structure needs to be installed between the inner square tube 101, the lower inner section of the auxiliary arm 20, and the assist rod 40. A simple structure can be used, where the bearing is installed in the gap between the assist rod 40 and the assist grooves 1010 and 200. Considering the relatively long length of the assist rod, the two ends of the assist rod may not be completely synchronized under the lifting action of the pulley system. Therefore, if... Figure 6 As shown, a connecting plate 45 is fixed to the end of the assist rod 40. A bearing seat 46 is provided on each side of the connecting plate 45 near the assist groove. Two bearings 47 are provided in the vertical direction of the bearing seats 46, which act on the inner wall of the inner square tube 101 or the auxiliary vertical arm 20. A main rope connecting block 48 is provided in the other direction of the connecting plate 45.

[0117] Figure 7 and Figure 8This invention provides a third specific embodiment of the adjustable pull-up device. This structure is used for pull-up exercises after identity verification, and can be used for exercise management of pull-up users to gradually improve their performance. It can also be used for paid exercise after identity verification. The specific structure is as follows: A locking mechanism is provided at the through-slot 1030 position of the outer square tube 103, including a locking plate 106 hinged to one side of the through-slot 1030 (specifically above the slider 84 at the lowest position), and a locking hook block 107 and an unlocking block 108 located on the other side of the through-slot 1030. The locking hook block 107 is fixed to the other side of the through-slot 1030 by screws or other means. The other side of the through-slot 1030 has a protruding edge 1032 to block the locking hook block 107. The locking hook block 107 also has a rotatable locking pin 1071, and the locking plate 106 has a locking hook hole 1064 corresponding to the locking hook portion of the locking pin 1071. An unlocking block 108 is fixed to the outer side of the locking hook block 107 by screws. The unlocking block 108 is equipped with an unlocking electromagnet 1081 and also covers the locking hook block 107. A locking recognition circuit 1082 is also provided on the outer side of the unlocking block 108. An electronic tag 1062 is located at the position corresponding to the locking recognition circuit 1082 on the locking plate 106. When the electronic tag 1062 approaches the locking recognition circuit 1082, it is identified as locked, and billing ends. The locking plate 106 also blocks the slider 84, preventing the slider 84 from moving and thus preventing it from providing assistance. The pull-up user can then freely complete the pull-up movement without assistance.

[0118] The hinge between the through groove 1030 and the locking plate 106 is equipped with a hinge 1061 with a torsion spring. After unlocking, the locking plate 106 will automatically spring open and remain in the open state, preventing it from blocking the through groove 1030 and hindering the movement of the slider 84. In practical applications, it is also necessary to combine... Figure 12 The control circuit and other components work together.

[0119] Because pull-ups require strong grip strength, and beginners often have weaker grip strength, gloves or hand guards can be used. Therefore, more specific implementation methods include... Figure 8A As shown in the embodiment with glove rental function, the inner side of the locking plate 106 is provided with two magnetic connection grooves 1063 (each groove contains two detection electrical contacts connected to the control circuit) for hanging gloves 109 (or hand hooks). The gloves 109 have protrusions 1091 that match the shape of the magnetic connection grooves 1063, and two electrically connected pins located within the protrusions 1091. These two pins correspond to the two detection electrical contacts. When the locking state is detected, it is simultaneously detected whether both gloves 109 are returned to the inner side of the locking plate 106 (see reference). Figure 14(Circuit block diagram). Furthermore, considering the disinfection of gloves 109, in a further embodiment, a disinfectant spray bottle with its nozzle facing upwards can be provided on the inner wall of the upper side of the through groove 1030. This can be used for cleaning and disinfecting the hands of pull-up performers. The sprayed disinfectant mist has a certain residence time and can also continue to disinfect gloves 109 inside the locking plate 106 when it is in a locked state. This structure is ingenious, easy to use, multifunctional, and low-cost.

[0120] In other embodiments, the telescopic structure can also be a spiral structure, with the cross arm fixedly connected to the screw, and a nut seat provided at the outer end of the lever.

[0121] In other embodiments, there are two identical main support arm structures, there can be two sliders, there can be two levers, and the cross arm is located between the outer ends of the two levers. The person doing the counterweight exercise and the person doing the pull-up exercise are in opposite directions or in the same direction.

[0122] like Figures 9 to 12 As shown, another embodiment of the adjustable pull-up assist device of the present invention (using a dual-mode pulley system) includes a portal frame, which includes two vertical arm structures and a crossbar disposed between the upper ends of the two vertical arm structures; the vertical arm structure includes a main vertical arm structure and a secondary vertical arm structure.

[0123] It also includes a booster rod located between the lower ends of the two boom structures.

[0124] The two ends of the assist bar are connected to the upright arm structure in an up-down motion; a support block is set in the middle of the assist bar to provide auxiliary support for the pull-up exerciser;

[0125] And, the slider is slidably connected to the vertical arm structure. The lower end of the slider is connected to one end of the secondary rope, and the other end of the secondary rope passes around the lower fixed pulley and is fixedly connected to the spindle of the upper movable pulley.

[0126] A lever hinged to a slider, with its inner end hinged to the slider and its outer end equipped with a cross arm to suspend a counterweight or a counterweight operator.

[0127] The upper end of the support arm is hinged to the middle section of the lever, and the lower end of the support arm is hinged to the outer side of the vertical arm structure.

[0128] The above structure and Figures 1 to 8 The embodiments are the same. The difference lies in the following structure:

[0129] The boom structure is equipped with a dual-mode pulley system, which includes three movable pulleys, a reducing main rope 711, a increasing main rope 712, four fixed pulleys, a reducing intermediate rope 713, a increasing intermediate rope 714, and a secondary rope 715; the movable pulleys include a reducing lower movable pulley 721, an increasing lower movable pulley 722, and an upper movable pulley 723; the fixed pulleys include a lower fixed pulley 731, an upper fixed pulley 732, a reducing fixed pulley 733, and an increasing fixed pulley 734; the reducing main rope... The fixed end of the cable 711 is fixed to the lower end of the main boom structure. The movable end of the shearing main cable 711 passes upward over the shearing lower movable pulley 721 and is fixedly connected to the end of the assist rod 40. The spindle of the shearing lower movable pulley 721 is fixedly connected to the lower end of the shearing intermediate cable 713. The upper end of the shearing intermediate cable 713 passes over the shearing fixed pulley 733 and the upper fixed pulley 732 located at the upper end of the main boom structure, extends downward, passes over the upper movable pulley 723, extends upward, and is fixedly connected to the upper end of the main boom structure.

[0130] One end of the main force-enhancing rope 712 is fixed to the assist rod, and the other end is fixed to the spindle of the lower force-enhancing movable pulley 722; one end of the intermediate force-enhancing rope 714 is fixed to the upper end of the auxiliary boom structure, and the other end passes through the lower force-enhancing movable pulley 722, the fixed force-enhancing pulley 734 and the upper fixed pulley 732 located at the upper end of the auxiliary boom structure, extends downward, passes through the upper movable pulley 723, extends upward, and is fixedly connected to the upper end of the main boom structure.

[0131] A mode switching mechanism 70 is provided between the spindle 7210 of the reducing lower movable pulley 721 and the lower end of the reducing intermediate rope 713. When the mode switching mechanism 70 is open, the spindle 7210 of the reducing lower movable pulley 721 and the lower end of the reducing intermediate rope 713 are in a movable connection state, and the spring 701 provided between them is stretched when an external force is applied and retracted when no external force is applied. When the mode switching mechanism 70 is closed, the spindle 7210 of the reducing lower movable pulley 721 and the lower end of the reducing intermediate rope 713 are in a fixed connection state.

[0132] When the mode switching mechanism is closed, the downward pulling force generated by the counterweight or the person performing the counterweight movement generates a counterforce through lever 85, causing slider 84 to move upward. Slider 84 then pulls secondary rope 715, causing upper movable pulley 723 to move downward. The downward movement of upper movable pulley 723 causes the lower ends of reducing intermediate rope 713 and increasing intermediate rope 714 to move upward at twice the speed of slider 84. The lower end of reducing intermediate rope 713 generates an upward lifting force on reducing lower movable pulley 721, causing the movable end of reducing main rope 711 to drive the assist rod to move the slider. The slider moves upward at four times the speed of the slider 84; the lower end of the force-increasing intermediate rope 714 generates an upward lifting force on the force-increasing lower movable pulley 722, causing the spindle of the force-increasing lower movable pulley 722 and the force-increasing main rope 712 to drive the other end of the assist rod 40 to move upward at one time the speed of the slider 84. Since the speed is slower than the speed of the force-reducing lower movable pulley 721, the force-increasing main rope 712 is in a non-stressed state (a torsion spring can be fixed at the lower end of the force-increasing main rope 712 to automatically wind up the non-stressed force-increasing main rope 712), and it is in the force-reducing working mode at this time.

[0133] When the mode switching mechanism 70 is activated, the downward pulling force generated by the counterweight or the person performing the pull-up generates a counterforce through the lever 85, causing the slider 84 to move upward. The slider 84 then pulls the secondary rope 715, causing the upper pulley 723 to move downward. The downward movement of the upper pulley 723 causes the lower ends of the reducing intermediate rope 713 and the increasing intermediate rope 714 to move upward at twice the speed of the slider 84. The lower end of the reducing intermediate rope 713 pulls the spring 701, generating an upward lifting force on the reducing lower pulley 721 equal to the spring force (since the spring force is much less than the assistance required by the pull-up performer, the reducing lower pulley 722 and the reducing main rope 711 do not generate an effective lifting force in this case). The lower end of the increasing intermediate rope 714 generates an upward lifting force on the increasing lower pulley 722, causing the spindle of the increasing lower pulley 722 and the increasing main rope 712 to drive the assist rod 40 to move upward at once the speed of the slider 84. At this time, the operation is in the increasing mode.

[0134] More specifically, the mode switching mechanism 70 includes a pulley seat 700 for fixing the reducing lower movable pulley 721, a spring lower fixing pin 702 and a rotating shaft 703 disposed within the pulley seat 700, and a movable block 704 disposed between the spring 701 and the reducing intermediate rope 713; the rotating shaft 703 passes transversely through the movable block 704; the pulley seat 700 has a hollow groove 705 and sliding grooves 706 disposed on both sides of the hollow groove 705, and the reducing lower movable pulley 721 is fixed at the lower end of the hollow groove 705; the bottom of the sliding groove 706 has an arc groove 7061 with a diameter larger than the width of the sliding groove 706; the rotating... A flat arc bushing 7031 is fixedly connected to the corresponding position of the shaft 703 and the slide groove 706. The arc segment of the flat arc bushing 7031 cooperates with the arc groove 7061, and the flat segment cooperates with the slide groove 706. When the tension of the spring 701 causes the flat arc bushing 7031 to slide into the arc groove, the mode switching mechanism is closed when the knob 7032 provided at the outer end of the rotating shaft 703 is rotated so that the flat segment of the flat arc bushing 7031 is perpendicular to the slide groove 706. When the knob is rotated so that the flat segment of the flat arc bushing 7031 is parallel to the slide groove, the mode switching mechanism is open.

[0135] A mode-switching mechanism is employed. Whether in force-reducing or force-increasing mode, the assist rod only experiences force at one end. Therefore, to prevent jamming during lifting, the connection points of both the force-reducing and force-increasing main ropes to the assist rod are located between the sliding connection points at both ends of the assist rod and the boom structure. Figure 9 As shown. Specifically, when square tubes are used as the main and auxiliary uprights, the inner square tube 101 and the lower inner and outer sections of the auxiliary upright 20 are provided with assist grooves, and the bearings are installed in the assist grooves on the outer side.

[0136] like Figure 13 As shown in the embodiment of the progressive pull-up training system 90 of the present invention, an adjustable pull-up assist device is used. An upper force sensor 91 and a lower force sensor 92 are respectively installed at the handle position of the crossbar 30 and the support position of the assist bar 40 to detect the pulling force at the upper end and the supporting force at the lower end of the pull-up exerciser. The system also includes a control circuit 94 connected to the upper force sensor 91 and the lower force sensor 92, and a power circuit 941, a control button 942, a display screen 943, and a speaker 945 connected to the control circuit 94. This training system can obtain the exercise data of the pull-up exerciser through the upper and lower force sensors. Under the same assist condition, after reaching a set number of repetitions (e.g., 100 to 500), a voice prompt is given to adjust the assist level, thereby achieving a progressive increase in the pull-up exerciser's ability.

[0137] More specifically, it also includes a locking mechanism (i.e., a locking plate) located at the corresponding position of the slider 84, and an unlocking mechanism (i.e., an unlocking electromagnet 944 connected to the control circuit 94) for releasing the locked state. The control circuit is also connected to a locking identification circuit 1082 and an identity identification circuit 947. After the pull-up exerciser is identified by RFID identification, the exercise time and / or billing are performed.

[0138] like Figure 14 The illustrated embodiment uses a QR code scanning method, and achieves network-connected real-name verification for payment and exercise timing via communication circuit 946. It also features a glove rental function, with a glove recognition circuit 948 connected to control circuit 94 to identify whether the gloves have been returned properly. For a detailed structure, please refer to [reference needed]. Figure 8A The example shown.

[0139] In summary, this invention, through its lever and pulley system, utilizes the counterweight provided by the pull-up athlete or an object (such as a backpack) to provide upward assistance, helping them complete the full pull-up movement. This, in turn, exercises the relevant muscle groups involved in pull-ups. The counterweight is gradually reduced until a standard pull-up can be completed without any counterweight. When using a four-pulley system, it is suitable to use a pull-up athlete as counterweight, i.e., an athlete with a similar weight to the pull-up athlete. While acting as counterweight, the athlete is also performing a suspension exercise, achieving two benefits at once. When using a dual-mode pulley system, a mode switching mechanism allows switching between modes. When closed, it is a force-reducing mode, utilizing the counterweight provided by the athlete (also known as the suspension athlete). When open, it is a force-increasing mode, utilizing a counterweight object (such as a backpack) to provide assistance. A glove rental function is also included to protect the pull-up athlete's fingers.

[0140] Overall, this invention can be widely applied in public places such as schools, communities, and residential areas, helping most athletes who cannot perform a standard pull-up to gradually develop an enthusiasm for pull-ups and improve the strength of their arm and chest muscles with the assistance of a support bar. It can provide equipment support for nationwide fitness activities and has good economic and social benefits.

[0141] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. An adjustable pull-up assist device, characterized in that, It includes a portal frame, which includes two vertical arm structures and a crossbar located between the upper ends of the two vertical arm structures; It also includes a booster rod located between the lower ends of the two boom structures. The two ends of the assist rod are movably connected to the upright arm structure; a support block is provided in the middle of the assist rod to provide auxiliary support for the pull-up exerciser; The boom structure is equipped with a dual-mode pulley system, which includes three movable pulleys, one load-reducing main rope, one load-increasing main rope, four fixed pulleys, one load-reducing intermediate rope, one load-increasing intermediate rope, and one secondary rope. The movable pulleys include a lower load-reducing movable pulley, a lower load-increasing movable pulley, and an upper movable pulley. The fixed pulleys include a lower fixed pulley, an upper fixed pulley, a load-reducing fixed pulley, and a load-increasing fixed pulley. The boom structure includes a main boom structure and a secondary boom structure. The fixed end of the main shearing rope is fixed to the lower end of the main boom structure, and the movable end of the main shearing rope is fixedly connected to the end of the assist rod after passing upward around the lower shearing pulley. The spindle of the lower shearing pulley is fixedly connected to the lower end of the intermediate shearing rope, and the upper end of the intermediate shearing rope passes over the fixed shearing pulley and the upper fixed pulley located at the upper end of the main boom structure, extends downward, passes over the upper movable pulley, extends upward, and is fixedly connected to the upper end of the main boom structure. One end of the main force-enhancing rope is fixed to the assist rod, and the other end is fixed to the spindle of the lower force-enhancing pulley; one end of the intermediate force-enhancing rope is fixed to the upper end of the auxiliary boom structure, and the other end passes through the lower force-enhancing pulley, the fixed force-enhancing pulley and the upper fixed pulley located at the upper end of the auxiliary boom structure, extends downward, passes through the upper movable pulley, extends upward, and is fixedly connected to the upper end of the main boom structure. A mode switching mechanism is provided between the spindle of the lower force-reducing pulley and the lower end of the intermediate force-reducing rope; when the mode switching mechanism is open, the spindle of the lower force-reducing pulley and the lower end of the intermediate force-reducing rope are in a movable connection state, and the spring between them is stretched when an external force is applied and retracted when no external force is applied; when the mode switching mechanism is closed, the spindle of the lower force-reducing pulley and the lower end of the intermediate force-reducing rope are in a fixed connection state. And, a slider that is slidably connected to the vertical arm structure, the lower end of the slider being connected to one end of the secondary rope, and the other end of the secondary rope being fixedly connected to the spindle of the upper movable pulley after passing around the lower fixed pulley; A lever hinged to the slider, the inner end of the lever being hinged to the slider, and the outer end of the lever having a cross arm for suspending a counterweight or a counterweight operator; A support arm is hinged to the middle section of the lever, the upper end of the support arm is hinged to the middle section of the lever, and the lower end of the support arm is hinged to the outer side of the upright arm structure. When the mode switching mechanism is closed, the downward pulling force generated by the counterweight or the counterweight mover generates a reverse force through the lever, causing the slider to move upward. The slider then pulls the secondary rope, causing the upper moving pulley to move downward. The downward movement of the upper moving pulley causes the lower ends of the reducing and increasing intermediate ropes to move upward at twice the speed of the slider. The lower end of the reducing intermediate rope generates an upward lifting force on the reducing lower moving pulley, causing the movable end of the reducing main rope to drive the assist rod to move upward at four times the speed of the slider. The lower end of the increasing intermediate rope generates an upward lifting force on the increasing lower moving pulley, causing the spindle of the increasing lower moving pulley and the increasing main rope to drive the assist rod to move upward at one time the speed of the slider, thereby putting the increasing main rope in a non-stressed state, which is the reducing working mode. When the mode switching mechanism is activated, the downward pulling force generated by the counterweight or the person moving it generates a counterforce through the lever, causing the slider to move upward. The slider then pulls the secondary rope, causing the upper pulley to move downward. The downward movement of the upper pulley causes the lower ends of the reducing and increasing intermediate ropes to move upward at twice the speed of the slider. The lower end of the reducing intermediate rope pulls the spring, generating an upward lifting force on the reducing lower pulley equal to the spring force. The lower end of the increasing intermediate rope generates an upward lifting force on the increasing lower pulley, causing the spindle of the increasing lower pulley and the increasing main rope to drive the assist rod to move upward at once the speed of the slider. At this time, the system is in the increasing mode.

2. The adjustable pull-up assist device according to claim 1, characterized in that... The mode switching mechanism includes a pulley seat for fixing the reducing lower movable pulley, a spring fixing pin and a rotating shaft disposed within the pulley seat, and a movable block disposed between the spring and the reducing intermediate rope; the rotating shaft passes through the movable block; the pulley seat has a hollow groove and sliding grooves on both sides of the hollow groove, and the reducing lower movable pulley is fixed at the lower end of the hollow groove; the bottom of the sliding groove has an arc groove with a diameter greater than the width of the sliding groove; a flat arc bushing is fixedly connected to the rotating shaft at a position corresponding to the sliding groove, the arc segment of the flat arc bushing mates with the arc groove, and the flat segment mates with the sliding groove; when the tension of the spring causes the flat arc bushing to slide into the arc groove, and the knob at the outer end of the rotating shaft is rotated so that the flat segment of the flat arc bushing is perpendicular to the sliding groove, the mode switching mechanism is in the closed state; when the knob is rotated so that the flat segment of the flat arc bushing is parallel to the sliding groove, the mode switching mechanism is in the open state.

3. A progressive pull-up training system, characterized in that... The adjustable pull-up device according to any one of claims 1-2 is provided with an upper force sensor and a lower force sensor at the handle position of the crossbar and the support position of the assisting bar, respectively, to detect the pulling force at the upper end and the supporting force at the lower end of the pull-up exerciser; it also includes a control circuit connected to the upper force sensor and the lower force sensor, and a power circuit, control button and display screen connected to the control circuit.

4. The progressive pull-up training system according to claim 3, characterized in that, It also includes a locking mechanism located at the lower end or side of the slider, and an unlocking mechanism for releasing the locked state. The control circuit is also connected to a locking identification circuit and an identity identification circuit. After the pull-up exerciser is identified by RFID identification or QR code identification, the exercise time and / or billing are performed.

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