Tension adjuster and tension fitness device

Abstract

This invention discloses a tension adjuster and a tension fitness device. The tension adjuster includes a housing and a cable winding mechanism, a flywheel, a friction plate, and a motor located within the housing. The cable winding mechanism is rotatably connected to the housing. The flywheel is mounted on the cable winding mechanism and rotates with it. The friction plate cooperates with the flywheel to generate frictional resistance. The motor drives the friction plate to move relative to the flywheel to increase or decrease the frictional resistance between the friction plate and the flywheel. The tension adjuster of this invention can adjust the frictional resistance between the friction plate and the flywheel by driving the friction plate with a motor, allowing the tension to be adjusted according to the user's actual situation. This enriches the functionality of the tension fitness device, making it suitable for users of different strengths, convenient to use, and the small size of the tension adjuster reduces the overall size of the tension fitness device, making it easy for users to carry.

Description

Technical Field

[0001] This invention relates to the field of fitness equipment technology, and more particularly to tension adjusters and tension fitness devices. Background Technology

[0002] With the improvement of people's living standards and the increasing emphasis on physical exercise, the use of sports and fitness equipment is becoming more and more widespread. Traditional resistance bands are generally divided into two types: one is a spring or rubber band resistance band consisting of elastic elements and handles, which has an overly simple structure and poor user experience; the other is a large piece of equipment placed indoors, such as in a gym, which takes up a lot of space and cannot be carried around. Summary of the Invention

[0003] In view of this, the present invention provides a tension adjuster and a tension fitness device that can adjust the tension and is easy to carry.

[0004] A tension adjuster includes a housing and a take-up mechanism, a flywheel, a friction plate, and a motor located within the housing. The take-up mechanism is rotatably connected to the housing. The flywheel is mounted on the take-up mechanism and can rotate with the take-up mechanism. The friction plate is used to cooperate with the flywheel to generate frictional resistance. The motor drives the friction plate to move relative to the flywheel to increase or decrease the frictional resistance between the friction plate and the flywheel.

[0005] In some embodiments, the housing is provided with a transmission component that is connected to the motor drive. The transmission component can rotate under the drive of the motor to push the friction plate to move relative to the flywheel.

[0006] In some embodiments, the motor includes a drive shaft, on which a gear capable of rotating with the drive shaft is fitted, and the transmission member is provided with teeth that mesh with the gear.

[0007] In some embodiments, the transmission member includes a main body and a protrusion protruding from one side of the main body. The main body is rotatably connected to the housing and is used to drive the friction plate to move relative to the flywheel. The teeth are provided on the side of the protrusion away from the main body.

[0008] In some embodiments, the flywheel has a recessed cavity, and the friction plate and the transmission member are housed in the recessed cavity. The friction plate includes a fixed portion fixed relative to the housing and a movable portion located at one end of the fixed portion. The fixed portion is in contact with the inner wall of the flywheel, and the movable portion can be in contact with or separate from the inner wall of the flywheel under the action of the transmission member.

[0009] In some embodiments, the movable part has a mounting portion on the side away from the flywheel, and an elastic element is provided inside the mounting portion. The outer casing has a fixing block that is inserted into the mounting portion. The end of the elastic element near the flywheel is connected to the fixing block, and the end away from the flywheel is connected to the inner wall of the mounting portion. When the motor drives the transmission member to push the movable part, the movable part moves toward the flywheel and compresses the elastic element. When the motor drives the transmission member to stop pushing the movable part, the movable part moves away from the flywheel under the elastic force of the elastic element.

[0010] In some embodiments, the tension adjuster further includes a maximum gear detection switch and a minimum gear detection switch for detecting the position of the transmission member, the maximum gear detection switch and the minimum gear detection switch being located on opposite sides of the transmission member, respectively.

[0011] In some embodiments, the housing is provided with a control mechanism electrically connected to the motor, the winding mechanism is provided with a magnetic element, and the control mechanism is provided with a Hall switch that cooperates with the magnetic element to detect the calories consumed by the user during exercise.

[0012] In some embodiments, the tension adjuster further includes a tension sensor mounted on the housing, the tension sensor being used to detect the tension applied to the cable when it performs a stretching motion.

[0013] In some embodiments, the take-up mechanism includes a take-up reel and a take-up spring. The take-up reel is rotatably connected to the housing, and a first receiving cavity and a second receiving cavity are respectively provided on opposite sides of the take-up reel. The first receiving cavity is located on the outer periphery of the second receiving cavity. The take-up spring is received in the first receiving cavity, and one end of the take-up spring is connected to the housing and the other end is connected to the take-up reel. The flywheel is received in the second receiving cavity.

[0014] In some embodiments, the second receiving cavity is provided with an annular column, the flywheel is provided with a protrusion inserted into the annular column, and a one-way bearing is provided between the outer periphery of the protrusion and the inner wall of the annular column.

[0015] The present invention also provides a tension fitness device, including a fixing belt, a pull rope, a pull ring, and a tension adjuster as described above. The housing of the tension adjuster is fixed to the fixing belt and has a cable routing hole. One end of the pull rope is connected to the cable take-up mechanism, and the other end passes through the cable routing hole and is connected to the pull ring.

[0016] In some embodiments, the fixing belt is a waist belt, the pull ring includes a wristband and an ankle ring, a pulley is rotatably mounted on the ankle ring, and the pull rope is wound around the pulley and fixedly connected to the wristband at one end away from the tension adjuster.

[0017] The solution provided by this invention allows the tension adjuster to adjust the friction resistance between the friction plate and the flywheel by driving the friction plate with a motor. This enables the tension to be adjusted according to the user's actual situation, enriching the function of the tension fitness device and making it suitable for users of different strengths. It is also convenient to use. Furthermore, the tension adjuster is small in size, reducing the overall size of the tension fitness device and making it easy for users to carry around. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a tension fitness device provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the tension adjuster shown in the figure;

[0020] Figure 3 for Figure 1 An exploded view of the tension adjuster and part of the pull rope shown in the diagram;

[0021] Figure 4 for Figure 2 A sectional view along line A-A;

[0022] Figure 5 for Figure 2 A cross-sectional view along line B-B;

[0023] Figure 6 for Figure 3 An exploded view of the take-up mechanism shown in the diagram;

[0024] Figure 7 for Figure 3 An exploded view of the flywheel, take-up reel, first housing, and part of the pull rope shown in the diagram;

[0025] Figure 8 This is a partially exploded view of the mounting bracket, motor, transmission components, friction plates, and part of the control system shown in Figure 3.

[0026] In the diagram: 100. Pull-up fitness device; 1. Fixing strap; 2. Pull rope; 3. Pull-up adjuster; 4. Wristband; 5. Ankle band; 6. Pulley; 10. Housing; 20. Cable take-up mechanism; 30. Flywheel; 40. Friction plate; 11. Cable routing hole; 12. First housing; 13. Second housing; 14. Mounting bracket; 21. Cable take-up reel; 22. Cable take-up spring; 211. Cable groove; 212. First receiving cavity; 213. Second receiving cavity; 214. Annular column; 31. Protrusion; 23. One-way bearing; 24. Cable cover; 221 121. Hook; 122. Enclosure; 123. Notch; 215. Hook part; 50. Motor; 60. Transmission component; 51. Drive shaft; 52. Gear; 61. Tooth pattern; 62. Main body; 63. Protrusion; 32. Cavity; 41. Fixing part; 42. Moving part; 43. Mounting part; 44. Elastic component; 15. Fixing block; 71. Battery; 72. Circuit board; 16. Button; 73. Maximum gear detection switch; 74. Minimum gear detection switch; 80. Magnetic component; 17. Display screen; 90. Tension sensor. Detailed Implementation

[0027] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, inside, outside, top, bottom, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, the component may be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it may be directly connected to the other component or there may be an intervening component present.

[0030] Please see Figures 1 to 8 An embodiment of the present invention provides a tension fitness device 100, including a fixing strap 1, a pull rope 2, a pull ring, and a tension adjuster 3. The fixing strap 1 is used to fix it to a suitable part of the user's body. The tension adjuster 3 is fixed to the fixing strap 1. One end of the pull rope 2 is connected to the tension adjuster 3, and the other end is connected to the pull ring. The user puts the pull ring on their hand and / or foot, and then pulls the pull rope 2 with their hand and / or foot to exercise the muscles of their hand and / or foot.

[0031] The specific fixing part 41 of the fixing belt 1 is not limited, such as the waist or the leg. In the illustrated embodiment, the fixing belt 1 is a belt that is fixed to the user's waist.

[0032] The pull ring system includes a wristband 4 and an ankle ring 5. The wristband 4 is worn on the user's wrist, and the ankle ring 5 is worn on the user's foot. The middle of the pull rope 2 is movably connected to the ankle ring 5, and the end of the pull rope 2 away from the tension adjuster 3 is fixedly connected to the wristband 4. By setting up the wristband 4 and ankle ring 5, the user can exercise both hand and leg muscles simultaneously, and it also allows the user to easily change various exercise postures, making it convenient for the user.

[0033] A pulley 6 is rotatably mounted on the outer side of the ankle ring 5, and the middle part of the pull rope 2 is wound around the pulley 6 so that the pull rope 2 can move relative to the ankle ring 5. The pulley 6 can reduce friction, reduce the wear rate of the pull rope 2, and thus extend the service life of the pull rope 2.

[0034] In the illustrated embodiment, tension adjusters 3 are provided on opposite sides of the fixing strap 1. The two tension adjusters 3 are connected to a wristband 4 and an ankleband 5 respectively via a pull rope 2, allowing the user to exercise the muscles of both hands and feet simultaneously.

[0035] The tension adjuster 3 includes a housing 10 and a take-up mechanism 20, a flywheel 30, and a friction plate 40 located inside the housing 10. The housing 10 is fixed to the fixing belt 1 and has a cable routing hole 11. One end of the pull rope 2 extends into the interior of the housing 10 and is fixedly connected to the take-up mechanism 20, and is partially wound around the take-up mechanism 20. The take-up mechanism 20 is rotatably connected to the housing 10. The flywheel 30 is mounted on the take-up mechanism 20 and can rotate with the take-up mechanism 20. The friction plate 40 cooperates with the flywheel 30 to form frictional resistance. That is, the friction plate 40 and the flywheel 30 are at least partially in contact, and friction is generated when they move relative to each other. When the user pulls the pull rope 2 outward, the pull rope 2 drives the take-up mechanism 20 and the flywheel 30 to rotate together. When the flywheel 30 rotates, it rubs against the friction plate 40, generating frictional resistance. The greater the frictional resistance between the flywheel 30 and the friction plate 40, the greater the pulling force required for the user to drive the pull rope 2 to perform the stretching movement.

[0036] The outer casing 10 includes a first casing 12 and a second casing 13. The first casing 12 is fixed to the fixing belt 1, and the second casing 13 covers the side of the first casing 12 away from the fixing belt 1 and encloses it to form a receiving space. The winding mechanism 20, the flywheel 30 and the friction plate 40 are all received in the receiving space.

[0037] The specific shape of the outer shell 10 is not limited, such as circular, elliptical or square, etc. In the illustrated embodiment, the outer shell 10 is basically circular.

[0038] The take-up mechanism 20 includes a take-up reel 21 and a take-up spring 22. The take-up reel 21 is rotatably connected to the housing 10, and its outer circumference is recessed to form a groove 211. One end of the pull rope 2 is fixedly connected to the take-up reel 21 and partially wound and stored in the groove 211. One end of the take-up spring 22 is connected to the housing 10, and the other end is connected to the take-up reel 21. A flywheel 30 is mounted on the take-up reel 21. When the user pulls the pull rope 2 outward, the pull rope 2 drives the take-up reel 21 to rotate, which in turn drives the flywheel 30 to rotate and causes the take-up spring 22 to contract and tighten. When the user no longer applies pulling force to the pull rope 2, the take-up spring 22 returns to its original state under its own elastic force and drives the take-up reel 21 to rotate in the opposite direction to retract the pulled-out pull rope 2, so that the pull rope 2 is rewound and stored in the groove 211 of the take-up reel 21.

[0039] The second receiving cavity 213 of the take-up reel 21 is provided with an annular column 214, and the flywheel 30 is provided with a corresponding protrusion 31. The protrusion 31 is inserted into the inner side of the annular column 214. A one-way bearing 23 is provided between the outer periphery of the protrusion 31 and the inner wall of the annular column 214. The one-way bearing 23 is tightly connected to the annular column 214 of the take-up reel 21. The one-way bearing 23 can rotate freely in one direction, while it is locked in the opposite direction, so that the flywheel 30 can rotate together with the take-up reel 21 in one direction. When the user pulls the rope 2 outward, the one-way bearing 23 locks and cannot rotate, thus fixing the take-up reel 21 and the flywheel 30 together. When the take-up reel 21 rotates, it drives the flywheel 30 to rotate as well. When the user no longer applies pulling force to the rope 2, the take-up spring 22 returns to its original state under its own action and drives the take-up reel 21 to rotate in the opposite direction to retrieve the pulled rope 2. The one-way bearing 23 can rotate freely in the direction of the reverse rotation of the take-up reel 21, releasing the fixing effect between the take-up reel 21 and the flywheel 30, allowing the take-up reel 21 to rotate relative to the flywheel 30. During the reverse rotation of the take-up reel 21, the flywheel 30 remains basically stationary, avoiding the friction between the flywheel 30 and the friction plate 40 from affecting the reverse rotation of the take-up reel 21.

[0040] The take-up reel 21 has a first receiving cavity 212 and a second receiving cavity 213 on opposite sides. The opening of the first receiving cavity 212 faces the first housing 12, and the opening of the second receiving cavity 213 faces the second housing 13. The first receiving cavity 212 is located on the outer periphery of the second receiving cavity 213. The take-up spring 22 is received in the first receiving cavity 212, and the inner end of the take-up spring 22 is connected to the outer housing 10. The outer end of the take-up spring 22 is connected to the take-up reel 21. The flywheel 30 is received in the second receiving cavity 213.

[0041] The take-up mechanism 20 also includes a wire cover 24, which is located at the opening of the first receiving cavity 212 to prevent the take-up spring 22 from falling out of the first receiving cavity 212.

[0042] The method of fixing the take-up spring 22 to the take-up reel 21 and the outer casing 10 is not limited. In the illustrated embodiment, both the inner and outer ends of the take-up spring 22 are provided with hooks 221. The inner wall of the first casing 12 is provided with a surrounding wall 121, and a notch 122 is provided on the surrounding wall 121. The hook 221 at the inner end of the take-up spring 22 hooks onto the surrounding wall 121 through the notch 122. The inner wall of the first receiving cavity 212 is provided with a hook portion 215. The hook 221 at the outer end of the take-up spring 22 hooks onto the hook portion 215, thereby realizing the connection between the inner end of the spring and the outer casing 10, and the connection between the outer end and the take-up reel 21.

[0043] The housing 10 also houses a motor 50, which drives the friction plate 40 to move relative to the flywheel 30, changing the contact area between the flywheel 30 and the friction plate 40. This increases or decreases the friction between the friction plate 40 and the flywheel 30, thus increasing or decreasing the pulling force required for the user to pull the rope 2. The tension adjuster 3 can adjust the frictional resistance between the friction plate 40 and the flywheel 30 by driving the friction plate 40 with the motor 50. This allows the pulling force required to pull the rope 2 to be adjusted according to the user's actual situation, enriching the functionality of the pull fitness device 100. This makes the pull fitness device 100 suitable for users of different strengths, convenient to use, and the small size of the tension adjuster 3 reduces the overall size of the pull fitness device 100, making it easy for users to carry.

[0044] The motor 50 drives the friction plate 40 to move relative to the flywheel 30. This can mean that the entire friction plate 40 is driven to move relative to the flywheel 30, or it can mean that a part of the friction plate 40 is driven to move relative to the flywheel 30.

[0045] A transmission component 60 is rotatably installed within the receiving space. The transmission component 60 is connected to the motor 50 so that the transmission component 60 can rotate under the drive of the motor 50, thereby pushing the friction plate 40 to move relative to the flywheel 30, so as to increase or decrease the frictional resistance between the flywheel 30 and the friction plate 40.

[0046] In the illustrated embodiment, the motor 50 includes a drive shaft 51, on which a gear 52 is mounted. The gear 52 is fixed relative to the drive shaft 51, meaning it can rotate with the drive shaft 51. The outer edge of the transmission component 60 has teeth 61, and the gear 52 meshes with the teeth 61 on the transmission component 60, thereby achieving a transmission connection between the motor 50 and the transmission component 60. When the drive shaft 51 of the motor 50 rotates, it drives the gear 52 to rotate as well. The gear 52 then drives the transmission component 60 to rotate through the teeth 61, thereby causing the transmission component 60 to drive the friction plate 40 to move relative to the flywheel 30.

[0047] In other embodiments, the transmission component 60 may also be directly fixed to the drive shaft 51 of the motor 50 so that the transmission component 60 can rotate under the action of the drive shaft 51.

[0048] The method of fixing gear 52 to drive shaft 51 is not limited. For example, it can be fixed by direct gluing or by using a limiting structure, as long as gear 52 can rotate with drive shaft 51.

[0049] The transmission component 60 includes a main body 62 and a protrusion 63 protruding from one side of the main body 62. The main body 62 is rotatably connected to the housing 10 and is used to drive the friction plate 40 to move relative to the flywheel 30. The protrusion 63 is basically fan-shaped and has teeth 61 on the side away from the main body 62.

[0050] The housing 10 also includes a mounting bracket 14 located within the receiving space, on the side of the take-up reel 21 away from the first housing 12. The motor 50 is mounted on the mounting bracket 14, and the transmission member 60 is located on the side of the mounting bracket 14 closer to the first housing 12, with the main body 62 of the transmission member 60 rotatably connected to the mounting bracket 14 of the housing 10.

[0051] The flywheel 30 is basically cylindrical and has a cavity 32 with an opening facing the mounting bracket 14. Both the friction plate 40 and the transmission component 60 are located within the cavity 32. When the flywheel 30 rotates following the take-up reel 21, the friction plate 40 rubs against the inner wall of the cavity 32, generating frictional resistance. The transmission component 60 rotates under the action of the motor 50, driving the friction plate 40 to move relative to the flywheel 30, thereby changing the contact area between the friction plate 40 and the flywheel 30 to adjust the magnitude of the frictional force between them. The specific number of friction plates 40 is not limited; for example, one or more. In the illustrated embodiment, there are two friction plates 40, spaced apart and facing each other. The transmission component 60 is located between the two friction plates 40, and the opposite sides of the main body 62 of the transmission component 60 abut against the adjacent ends of the two friction plates 40. When the motor 50 drives the transmission component 60 to rotate, the transmission component 60 can simultaneously drive both friction plates 40 to move relative to the flywheel 30.

[0052] The friction plate 40 is basically arc-shaped and includes a fixed part 41 fixed relative to the outer shell 10 and a movable part 42 located at one end of the movable part 42. The fixed part 41 is close to the motor 50 and always in contact with the inner wall of the flywheel 30. The movable part 42 is close to the main body 62 of the transmission member 60 and can be in contact with or separate from the inner wall of the flywheel 30 under the action of the main body 62. The fixed part 41 is fixedly connected to the mounting base and always has frictional resistance with the flywheel 30. When the motor 50 drives the movable part 42 of the friction plate 40 to contact the flywheel 30 through the transmission member 60, the contact area between the friction plate 40 and the flywheel 30 increases, and therefore the frictional resistance between them is also greater, and the pulling force required by the user to pull the pull rope 2 is also greater. Conversely, when the motor 50 drives the movable part 42 of the friction plate 40 to separate from the flywheel 30 through the transmission member 60, the contact area between the friction plate 40 and the flywheel 30 decreases, and the frictional resistance between them is also smaller, and the pulling force required by the user to pull the pull rope 2 is also smaller.

[0053] The movable part 42 is provided with a mounting part 43 on the side away from the flywheel 30. An elastic element 44 is provided inside the mounting part 43. A fixing block 15 is provided on the outer shell 10 and inserted into the mounting part 43. The end of the elastic element 44 near the flywheel 30 is connected to the fixing block 15, and the end of the elastic element 44 away from the flywheel 30 is connected to the inner wall of the mounting part 43. The fixed block 15 is located on the side of the mounting bracket 14 facing the friction plate 40 and cannot move. When the drive shaft 51 of the motor 50 rotates in one direction and drives the transmission member 60 to rotate, the transmission member 60 pushes the movable part 42 of the friction plate 40 toward the flywheel 30. The mounting part 43 on the movable part 42 will also move along with it. However, since the end of the elastic member 44 near the flywheel 30 is connected to the fixed block 15, the elastic member 44 will be compressed. When the drive shaft 51 of the motor 50 rotates in the opposite direction and drives the transmission member 60 to rotate in the opposite direction, the thrust of the transmission member 60 on the movable part 42 disappears, that is, the transmission member 60 stops pushing the movable part 42. Under the elastic force of the elastic member 44, the movable part 42 moves away from the flywheel 30, thereby separating the movable part 42 from the flywheel 30.

[0054] The specific type of elastic element 44 is not limited, as long as it can provide elastic restoring force. In the illustrated embodiment, elastic element 44 is a return spring.

[0055] The housing 10 also houses a control mechanism, which is located between the second housing 13 and the mounting bracket 14. The control mechanism includes a battery 71 that supplies power to the motor 50 and a circuit board 72 for controlling the motor 50. Both the motor 50 and the battery 71 are electrically connected to the circuit board 72.

[0056] The tension adjuster 3 has multiple settings, each corresponding to a specific tension value or range. The tension values ​​or ranges differ between settings, meaning the pull rope 2 requires different levels of tension to perform the stretching motion. The multiple settings include at least a maximum setting and a minimum setting. The tension adjuster 3 can be adjusted between the maximum and minimum settings by driving the friction plate 40 via the motor 50, allowing the user to select the setting suitable for their needs.

[0057] The tension adjuster 3 includes a maximum gear detection switch 73 and a minimum gear detection switch 74 connected to the circuit board 72. The maximum gear detection switch 73 corresponds to the maximum gear of the tension adjuster 3, and the minimum gear detection switch 74 corresponds to the minimum gear of the tension adjuster 3. The maximum gear detection switch 73 and the minimum gear detection switch 74 are fixed to the mounting bracket 14 and are located on opposite sides of the transmission component 60. When the motor 50 drives the transmission component 60 to rotate, causing the transmission component 60 to contact the maximum gear detection switch 73, the contact area between the flywheel 30 and the friction plate 40 is at its maximum, and the tension adjuster 3 is in the maximum gear position. When the transmission component 60 contacts the minimum gear detection switch 74, the contact area between the flywheel 30 and the friction plate 40 is at its minimum, and the tension adjuster 3 is in the minimum gear position.

[0058] Because motor 50 may have a step loss problem during operation, it may fail to drive transmission component 60 to contact maximum gear detection switch 73 or minimum gear detection switch 74 after completing the control command for the corresponding maximum or minimum gear. In this case, maximum gear detection switch 73 or minimum gear detection switch 74 will continue to control motor 50 to rotate, so as to drive transmission component 60 to move until transmission component 60 moves to contact maximum gear detection switch 73 or minimum gear detection switch 74. At this time, motor 50 will stop working, ensuring that tension adjuster 3 can be accurately adjusted to the maximum or minimum gear.

[0059] Understandably, the maximum gear detection switch 73 and the minimum gear detection switch 74 can be proximity sensors or tactile switches.

[0060] The second housing 13 is equipped with a button 16, which allows the user to control the start and stop of the motor 50 and its rotation direction, thereby adjusting the gear and making it convenient for the user.

[0061] The reel 21 is equipped with several magnetic components 80, such as magnets, and the circuit board 72 is equipped with a Hall switch (not shown) that cooperates with the magnetic components 80. When the reel 21 rotates, it drives the magnetic components 80 to rotate as well. The Hall switch can receive the displacement signal of the rotation of the magnetic components 80, thereby measuring the calories burned by the user during exercise.

[0062] In the illustrated embodiment, a display screen 17 is provided on the second housing 13 of the outer casing 10. The Hall switch measures the calories consumed by the user and displays them on the display screen 17, allowing the user to more intuitively know the calories consumed, enhancing interactivity and improving the user's operating experience. In other embodiments, the tension adjuster 3 can also inform the user of the calories consumed via voice, or, when the tension adjuster 3 is connected to an electronic device such as an app on a mobile phone, the display can also be shown on that app.

[0063] The tension adjuster 3 also includes a tension sensor 90 connected to the circuit board 72. The tension sensor 90 is located on the first housing 12 near the wiring hole 11, and the pull rope 2 passes through the tension sensor 90. The tension sensor 90 can detect the magnitude of the tension force on the pull rope 2 when it performs a stretching motion, that is, the magnitude of the tension force when the user pulls the pull rope 2. When the magnitude of the tension force detected by the tension sensor 90 does not match the current setting of the tension adjuster 3, the circuit board 72 controls the motor 50 to adjust the setting of the tension adjuster 3 to match the detected magnitude of the tension force, or reminds the user to adjust the setting or the tension force by means of an alarm signal such as voice.

[0064] In this application, the circuit board 72 is connected to the mobile terminal via a Bluetooth module. The tension sensor 90 can measure the tension force experienced by the rope 2 each time it performs a stretching exercise, and send the measured tension force to the mobile terminal. The mobile terminal can then generate a tension curve based on the tension force and display it on the screen of the mobile terminal for the user to view, thereby enhancing interactivity and making it convenient for the user to change their exercise habits according to their needs.

[0065] The tension adjuster of this invention is a tension fitness device. The tension adjuster can adjust the friction resistance between the friction plate and the flywheel by driving the friction plate with a motor, so that the tension can be adjusted according to the user's actual situation. This enriches the function of the tension fitness device, making it suitable for users with different strengths and convenient to use. Moreover, the tension adjuster is small in size, reducing the overall size of the tension fitness device and making it convenient for users to carry with them.

[0066] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A tension adjuster, characterized in that, The device includes a housing and a take-up mechanism, a flywheel, a friction plate, and a motor located within the housing. The take-up mechanism is rotatably connected to the housing. The flywheel is mounted on the take-up mechanism and can rotate with it. The friction plate is arc-shaped and contacts the inner wall of the flywheel. The friction plate is used to cooperate with the flywheel to generate frictional resistance. The motor drives the friction plate to move relative to the flywheel, thereby changing the contact area between the friction plate and the flywheel to increase or decrease the frictional resistance between them. The housing is provided with a transmission component that is connected to the motor. The friction plate includes a fixed part that is fixed relative to the housing and a movable part located at one end of the fixed part. The fixed part is in contact with the inner wall of the flywheel, and the movable part can be in contact with or separate from the inner wall of the flywheel under the action of the transmission component.

2. The tension adjuster according to claim 1, characterized in that, The motor includes a drive shaft, on which a gear capable of rotating together with the drive shaft is fitted, and the transmission component has teeth that mesh with the gear.

3. The tension adjuster according to claim 2, characterized in that, The transmission component includes a main body and a protrusion on one side of the main body. The main body is rotatably connected to the housing and is used to drive the friction plate to move relative to the flywheel. The teeth are provided on the side of the protrusion away from the main body.

4. The tension adjuster according to claim 1, characterized in that, The flywheel has a recessed cavity, and the friction plate and the transmission component are housed in the recessed cavity.

5. The tension adjuster according to claim 4, characterized in that, The movable part has a mounting part on the side away from the flywheel. The mounting part has an elastic element inside. The outer shell has a fixing block that is inserted into the mounting part. The end of the elastic element near the flywheel is connected to the fixing block, and the end away from the flywheel is connected to the inner wall of the mounting part. When the motor drives the transmission member to push the movable part, the movable part moves toward the flywheel and compresses the elastic element. When the motor drives the transmission member to stop pushing the movable part, the movable part moves away from the flywheel under the elastic force of the elastic element.

6. The tension adjuster according to claim 1, characterized in that, The tension adjuster also includes a maximum gear detection switch and a minimum gear detection switch for detecting the position of the transmission component, the maximum gear detection switch and the minimum gear detection switch being located on opposite sides of the transmission component.

7. The tension adjuster according to claim 1, characterized in that, The housing contains a control mechanism electrically connected to the motor, the winding mechanism has a magnetic component, and the control mechanism has a Hall switch that works with the magnetic component to detect the calories consumed by the user during exercise.

8. The tension adjuster according to claim 1, characterized in that, The tension adjuster also includes a tension sensor installed on the housing, which is used to detect the tension force on the rope when it performs a stretching motion.

9. The tension adjuster according to claim 1, characterized in that, The take-up mechanism includes a take-up reel and a take-up spring. The take-up reel is rotatably connected to the housing, and a first receiving cavity and a second receiving cavity are respectively provided on opposite sides of the take-up reel. The first receiving cavity is located on the outer periphery of the second receiving cavity. The take-up spring is received in the first receiving cavity, and one end of the take-up spring is connected to the housing and the other end is connected to the take-up reel. The flywheel is received in the second receiving cavity.

10. The tension adjuster according to claim 9, characterized in that, The second receiving cavity is provided with an annular column, and the flywheel is provided with a protrusion inserted into the annular column. A one-way bearing is provided between the outer periphery of the protrusion and the inner wall of the annular column.

11. A tension fitness device, characterized in that, The device includes a fixing strap, a pull cord, a pull ring, and a tension adjuster as described in any one of claims 1-10. The housing of the tension adjuster is fixed to the fixing strap and has a cable routing hole. One end of the pull cord is connected to the cable take-up mechanism, and the other end passes through the cable routing hole and is connected to the pull ring.

12. The tension fitness device according to claim 11, characterized in that, The fixing belt is a waist belt, and the pull ring includes a wristband and an ankle ring. A pulley is rotatably mounted on the ankle ring, and the end of the pull rope that is wound around the pulley and away from the tension adjuster is fixedly connected to the wristband.

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