Pulley assembly, training arm and fitness equipment

Abstract

This invention relates to a pulley assembly, a training arm, and fitness equipment, comprising: a pulley mounted on a pulley frame, with a pulley groove for winding a pulley rope; and a limiting unit mounted on the pulley frame, wherein the limiting unit and the pulley are movable relative to each other; in a first state, the gap between the limiting unit and the pulley is smaller than the diameter of the pulley rope, and in a second state, the gap between the limiting unit and the pulley is larger than the diameter of the pulley rope. The pulley rope is restricted by the limiting unit and cannot be dislodged from the groove; when it is necessary to disassemble and replace the pulley rope, operating the limiting unit and / or the pulley allows them to move relative to each other, thereby causing the limiting unit and the pulley to be misaligned. At this time, the distance between the groove of the limiting unit and the pulley will be larger than the diameter of the pulley rope, and the pulley rope can be removed from the pulley. This solution makes the operation of installing, removing, and replacing the pulley rope convenient, labor-saving, and efficient, without the need for tools, highly feasible, and conducive to improving the flexibility of product use and customer experience.

Description

Technical Field

[0001] This invention relates to the field of training and fitness equipment technology, and in particular to a pulley assembly, a training arm, and fitness equipment. Background Technology

[0002] In recent years, with the continuous improvement of living standards and quality of life, people have been paying more and more attention to their health. Due to limitations such as outdoor exercise venues and weather conditions, indoor fitness equipment has become popular due to its rich functions and scientific exercise methods.

[0003] Existing strength training equipment typically features a resistance rope and pulleys. One end of the rope connects to the resistance source, while the other end is gripped by the trainee for strength training. The rope is wound around the pulley, which guides the rope and reduces friction. To prevent the rope from slipping out of the pulley groove during exercise, the pulley frame is usually designed with a closed groove, and limit blocks are placed at both ends of the rope. This prevents the rope from accidentally pulling out. However, this design presents several problems: the pulley can only be removed with tools to detach or reinstall the rope, making rope replacement and disassembly extremely inconvenient, time-consuming, and labor-intensive, resulting in poor product flexibility and user experience. Summary of the Invention

[0004] Therefore, it is necessary to provide a pulley assembly, training arm, and fitness equipment to solve the problems of inconvenient, time-consuming, and labor-intensive operation of existing pull ropes, as well as poor user experience.

[0005] On one hand, this application provides a pulley assembly, which includes:

[0006] Pulley frame;

[0007] The pulley is mounted on the pulley frame, and the groove of the pulley is used to wind a rope; and

[0008] A limiting unit is mounted on the pulley frame, and the limiting unit and the pulley are movable relative to each other;

[0009] In the first state, the gap between the limiting unit and the pulley is smaller than the diameter of the pull rope. In the second state, the gap between the limiting unit and the pulley is larger than the diameter of the pull rope. The first state is the initial state of the limiting unit and the pulley.

[0010] The pulley assembly described above is used in fitness equipment. In the first state (i.e., the limiting unit and the pulley are initially engaged), the pull rope is wound around the pulley groove. At this time, the gap between the limiting unit and the pulley is smaller than the diameter of the pull rope, thus the pull rope is restricted by the limiting unit and cannot come out of the groove. In the second state, i.e., when the pull rope needs to be removed and replaced, operating the limiting unit and / or the pulley allows them to move relative to each other, thereby creating a misaligned arrangement between the limiting unit and the pulley. At this time, the distance between the limiting unit and the pulley will be larger than the diameter of the pull rope, allowing the pull rope to be removed from the pulley. Similarly, when the pull rope needs to be replaced, the limiting unit and the pulley are misaligned again, allowing the pull rope to be inserted into the groove through the gap between them. Then, the limiting unit and the pulley are moved back to their original positions, reducing the distance between them to be smaller than the diameter of the pull rope, ensuring the pull rope is reliably installed in the groove and not easily comes out. Compared with existing technologies, this solution makes the installation, removal and replacement of the pull rope convenient, labor-saving and efficient, without the need for tools, highly feasible, and conducive to improving the flexibility of product use and the customer's user experience.

[0011] The technical solution of this application will be further described below:

[0012] In one embodiment, the limiting unit and / or the pulley is slidably disposed relative to the pulley frame; or, the limiting unit and / or the pulley is rotatably disposed relative to the pulley frame;

[0013] In one embodiment, the limiting unit and / or the pulley can automatically return from the second state to the first state.

[0014] In one embodiment, the pulley frame includes a carrier plate, and the pulley frame also has an open side opposite to the carrier plate. The limiting unit includes a first limiting rod and a first elastic member. The carrier plate has a sliding hole, and the first limiting rod slides through the sliding hole. A first limiting step is provided at the end of the first limiting rod away from the carrier plate, and the first elastic member abuts against the first limiting step and the carrier plate.

[0015] In one embodiment, the limiting unit further includes a first fastener, one end of the first limiting rod extending out of the sliding hole is connected to the first fastener, and the first fastener abuts against the side wall of the carrier plate away from the open side.

[0016] In one embodiment, the pulley frame includes a carrier plate, and the pulley frame also has an open side opposite to the carrier plate. The limiting unit includes a second limiting rod, a limiting sleeve, and a second elastic member. The first end of the second limiting rod is fixed to the carrier plate, and the second end of the second limiting rod away from the carrier plate is provided with a second limiting step. The limiting sleeve is slidably sleeved outside the second limiting rod, and the second elastic member abuts between the limiting sleeve and the carrier plate.

[0017] In one embodiment, the pulley frame includes a carrier plate, and the pulley frame also has an open side opposite to the carrier plate. The pulley assembly further includes an axle, a third elastic element, and a second fastener. One end of the axle is fixed to the carrier plate, and the other end is located on the open side. The pulley is slidably fitted onto the outside of the axle. The second fastener is located at the end of the axle away from the carrier plate. The third elastic element abuts against the second fastener and the pulley. Alternatively...

[0018] The pulley frame includes a carrier plate and an open side opposite to the carrier plate. The pulley assembly also includes an axle, a third elastic element, and a second fastener. One end of the axle is mounted on the carrier plate by the second fastener, and the other end is located on the open side and is provided with a third limiting step. The pulley is slidably fitted onto the outside of the axle, and the third elastic element abuts against the third limiting step and the pulley.

[0019] In one embodiment, the pulley frame includes a carrier plate and an open side opposite to the carrier plate. The pulley assembly further includes an axle, a fourth elastic element, and a third fastener. The axle is slidably mounted on the carrier plate. One end of the axle passing through the carrier plate is connected to the third fastener. The third fastener has a travel distance from the carrier plate and can be limited to abut against the carrier plate. The fourth elastic element is connected between the third fastener and the carrier plate. The pulley is fixed at the other end of the axle away from the third fastener.

[0020] In one embodiment, the pulley frame includes a mounting plate and a carrier plate connected together. The limiting unit includes a positioning shaft, a fifth elastic element, and a third limiting rod. The positioning shaft is fixed to one side of the carrier plate. The third limiting rod is rotatably mounted on the positioning shaft and is connected to the mounting plate through the fifth elastic element. The third limiting rod is capable of rotating in the radial direction of the pulley.

[0021] In one embodiment, the side of the carrier plate is recessed with a limiting groove, the positioning shaft is disposed at the bottom of the limiting groove, the size of the third limiting rod is smaller than the width of the limiting groove, and the third limiting rod can be limited and abutted against the opposite two side walls of the limiting groove.

[0022] The third limiting rod has a positioning protrusion on the side facing the mounting plate, and the fifth elastic element is connected to the positioning protrusion.

[0023] On the other hand, this application also provides a training arm, characterized by comprising:

[0024] Swing arm tube; and

[0025] The pulley assembly described above is mounted at the end of the swing arm tube.

[0026] Furthermore, a fitness device is characterized by comprising:

[0027] Equipment body; and

[0028] The training arm described above is movably mounted on the main body of the device; or,

[0029] The pulley assembly described above is disposed on the main body of the device. Attached Figure Description

[0030] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the fitness equipment described in the embodiments of this application;

[0033] Figure 2 This is a schematic diagram of the pulley assembly in the first embodiment;

[0034] Figure 3 for Figure 2 A schematic diagram of the structure in normal operating condition;

[0035] Figure 4 for Figure 2 A schematic diagram of the structure in the state of having the pull rope installed or removed;

[0036] Figure 5 This is a schematic diagram of the pulley assembly in the second embodiment;

[0037] Figure 6 for Figure 5 A schematic diagram of the structure in normal operating condition;

[0038] Figure 7 for Figure 5 A schematic diagram of the structure in the state of having the pull rope installed or removed;

[0039] Figure 8 This is a schematic diagram of the pulley assembly in the third embodiment;

[0040] Figure 9 for Figure 8 A schematic diagram of the structure in normal operating condition;

[0041] Figure 10 for Figure 8 A schematic diagram of the structure in the state of having the pull rope installed or removed;

[0042] Figure 11 This is a schematic diagram of the pulley assembly in the fourth embodiment;

[0043] Figure 12 for Figure 11 A schematic diagram of the structure in normal operating condition;

[0044] Figure 13 for Figure 11 A schematic diagram of the structure in the state of being connected and disconnected by the pull rope.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100. Fitness equipment; 10. Fitness chair; 11. Seat frame; 12. Backrest assembly; 13. Seat cushion; 20. Training arm; 21. Swing arm tube; 22. Pulley assembly; 221. Pulley frame; 2211. Carrier plate; 2212. Mounting plate; 2213. Open side; 222. Pulley seat; 223. Pulley; 224. Limiting unit; 2241. First limiting rod; 2241a. First elastic element; 2241b. First limiting step; 224 1c, First fastener; 2242, Second limiting rod; 2242a, Limiting sleeve; 2242b, Second elastic element; 2242c, Second limiting step; 2243, Positioning shaft; 2243a, Fifth elastic element; 2243b, Third limiting rod; 2243c, Limiting groove; 2243d, Positioning protrusion; 225, Wheel axle; 226, Third elastic element; 227, Second fastener; 23, Pull rope; 30, Grip; 40, Resistance source. Detailed Implementation

[0047] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0048] Please see Figures 2 to 4 This application illustrates a pulley assembly 22, which includes a pulley frame 221, a pulley seat 222, a pulley 223, and a limiting unit 224. The pulley frame 221 is rotatably mounted on the pulley seat 222 via a pin and a bearing.

[0049] Pulley 223 is mounted on pulley frame 221, and pulley groove of pulley 223 is used to wind pulley 23; limiting unit 224 is mounted on pulley frame 221, and limiting unit 224 and pulley 223 can move relative to each other; in the first state, the gap formed by limiting unit 224 and pulley 223 is smaller than the diameter of pulley 23, and in the second state, the gap formed by limiting unit 224 and pulley 223 is larger than the diameter of pulley 23. The first state is the initial state of limiting unit 224 and pulley 223.

[0050] It should be noted that the gap formed between the limiting unit 224 and the pulley 223 specifically refers to the distance between the edge of the limiting unit 224 and the pulley 223, which can be zero. The space enclosed by the limiting unit 224 and the pulley 223 is used to accommodate the pull rope 23.

[0051] In summary, implementing the technical solution of this embodiment will have the following beneficial effects: The pulley assembly 22 of the above solution is applied to the fitness equipment 100 to meet the needs of people's upper limbs for strength training such as high pull and flat pull. In the first state (that is, the limiting unit 224 and the pulley 223 are in the initial engagement state), the pull rope 23 is wound around the groove of the pulley 223. At this time, the gap formed by the limiting unit 224 and the pulley 223 is smaller than the diameter of the pull rope 23, so the pull rope 23 is restricted by the limiting unit 224 and cannot be dislodged from the groove.

[0052] In the second state, i.e., when the pull rope 23 needs to be disassembled and replaced, operating the limiting unit 224 and / or pulley 223 allows them to move relative to each other, thus creating a misaligned arrangement between the limiting unit 224 and pulley 223. At this point, the distance between the limiting unit 224 and pulley 223 will be greater than the diameter of the pull rope 23, allowing the pull rope 23 to be removed from the pulley 223. Similarly, when replacing or installing the pull rope 23, the limiting unit 224 and pulley 223 are misaligned again, allowing the pull rope 23 to be inserted into the wheel groove through the gap between them. Then, the limiting unit 224 and pulley 223 are moved back to the first state, reducing the distance between them to less than the diameter of the pull rope 23, ensuring the pull rope 23 is reliably installed in the wheel groove and not easily detached. Compared to existing technologies, this solution provides convenient, labor-saving, and efficient operation for installing, disassembling, and replacing the pull rope 23, requiring no tools, offering strong feasibility, and improving product flexibility and customer experience.

[0053] It should be noted that the "initial state" mentioned above specifically refers to the installation and use state where the limit unit 224 and the pulley 223 are normally assembled, and the pull rope 23 is confined between the limit unit 224 and the pulley 223 and cannot be detached. The "second state" specifically refers to the state where, after the limit unit 224 and the pulley 223 move relative to each other, the gap between the limit unit 224 and the pulley 223 increases, and the pull rope 23 can be removed through the increased gap.

[0054] In this application, the limiting unit 224 and the pulley 223 are relatively movable, specifically including the following situations: the limiting unit 224 and / or the pulley 223 are slidably arranged relative to the pulley frame 221; or, the limiting unit 224 and / or the pulley 223 are rotatably arranged relative to the pulley frame 221. Furthermore, depending on actual needs, the limiting unit 224 and the pulley 223 can be simultaneously movably installed relative to the pulley frame 221. In addition, the limiting unit and / or the pulley can automatically return from the second state to the first state, so that when the pulley 23 is not disassembled, the pulley assembly 22 is always in its initial state, that is, always in the state of limiting the pulley 23. This increases the reliability of the pulley assembly 22 while reducing the degree of manual operation, and avoids the situation where the limiting function of the pulley assembly 22 on the pulley 23 fails due to the user forgetting to manually return the pulley assembly 22 from the second state to the first state.

[0055] To facilitate a clearer understanding of the technical solution of this application, several different embodiments are described below. Please continue reading. Figures 2 to 4 For example, in some embodiments, the pulley frame 221 includes a mounting plate 2212 and a carrier plate 2211, the mounting plate 2212 and the carrier plate 2211 being integrally formed and having an L-shaped structure.

[0056] Therefore, the pulley frame 221 also has an open side 2213 opposite to the carrier plate 2211. The pulley 223 is mounted on the carrier plate 2211 via an axle 225, and the open side 2213 is located at the end of the axle 225. The pull rope 23 can be inserted into the groove of the pulley 223 from the open side. The open side provides operating space for the removal and replacement of the pull rope 23, avoiding interference and facilitating easy removal and installation. At the same time, the open side 2213 also facilitates the axial movement of the pulley 223 without interference, thereby making it convenient for the pulley 223 to be mounted on or removed from the axle 225.

[0057] The limiting unit 224 includes a first limiting rod 2241 and a first elastic element 2241a. The carrier plate 2211 has a sliding hole, and the first limiting rod 2241 slides through the sliding hole. The end of the first limiting rod 2241 away from the carrier plate 2211 is provided with a first limiting step 2241b, and the first elastic element 2241a abuts against the first limiting step 2241b and the carrier plate 2211. In the first state, the first elastic element 2241a provides an elastic thrust, allowing the first limiting rod 2241 to extend freely and cover the groove of the pulley 223. At this time, the gap formed between the first limiting rod 2241 and the pulley 223 is smaller than the diameter of the pull rope 23, so that the pull rope 23 can be limited in the groove and cannot come out. When it is necessary to disassemble or replace the pull rope 23, push the first limiting rod 2241 towards the carrier plate 2211 to reach the second state. At this time, the distance between the first limiting rod 2241 and the pulley 223 increases to a value greater than the diameter of the pull rope 23. The pull rope 23 can then be removed from the pulley groove, or a new pull rope 23 can be installed. After releasing the first limiting rod 2241, it automatically resets under the pushing force of the first elastic element 2241a and covers the pulley 223 again, returning to the first state to limit the pull rope 23 installed in the pulley groove of the pulley 223, thus improving operational convenience.

[0058] Optionally, the first elastic element 2241a may be any one of, but not limited to, a spring, a sheet, or an elastic sleeve.

[0059] Furthermore, based on the above embodiment, the limiting unit 224 also includes a first fastener 2241c. One end of the first limiting rod 2241 extending out of the sliding hole is connected to the first fastener 2241c, and the first fastener 2241c is limited and abuts against the side wall of the carrier plate 2211 away from the release side 2213. The first fastener 2241c can prevent the first limiting rod 2241 from completely dislodging from the sliding hole of the carrier plate 2211 when it slides. Specifically, the end of the first limiting rod 2241 passing through the sliding hole is provided with a threaded section, and the first fastener 2241c is a nut. The nut is screwed into the threaded section, and the maximum diameter of the nut is larger than the diameter of the sliding hole. This embodiment has a simple structure and low cost. It only uses the combination of the first limiting rod 2241 and the first elastic element 2241a, and allows the first limiting rod 2241 to slide relative to the pulley frame 221. This solves the problem of limiting the pull rope 23 and also solves the problem of easy disassembly and assembly of the pull rope 23, without adding many structural components.

[0060] Please continue reading. Figures 5 to 7 In other embodiments, the pulley frame 221 includes a carrier plate 2211 and an open side 2213 opposite to the carrier plate 2211. The limiting unit 224 includes a second limiting rod 2242, a limiting sleeve 2242a, and a second elastic member 2242b. The first end of the second limiting rod 2242 is fixed on the carrier plate 2211, and the second end of the second limiting rod 2242 away from the carrier plate 2211 is provided with a second limiting step 2242c. The limiting sleeve 2242a is slidably sleeved outside the second limiting rod 2242 and located between the carrier plate 2211 and the second limiting step 2242c. The second elastic member 2242b abuts against the limiting sleeve 2242a and the carrier plate 2211. The second limiting step 2242c is used to limit the limiting sleeve 2242c to prevent it from sliding off the second limiting rod 2242. The function of the open side 2213 is the same as that in the aforementioned embodiments, and will not be repeated here.

[0061] The difference between this embodiment and the previous embodiment is that the distance between the limiting unit 224 and the pulley 223 is controlled by the limiting sleeve 2242a. That is, in the first state, under the elastic thrust of the second elastic member 2242b, the limiting sleeve 2242a covers the pulley 223, and the distance between the limiting sleeve 2242a and the pulley 223 is less than the diameter of the pull rope 23, so the pull rope 23 cannot detach from the pulley 223. When it is necessary to install or remove the pull rope 23, the limiting sleeve 2242a is pushed towards the carrier plate 2211, which is to reach the second state. At this time, the distance between the limiting sleeve 2242a and the pulley 223 gradually increases until it is greater than the diameter of the pull rope 23, so the pull rope 23 can be removed from the wheel groove or a new pull rope 23 can be installed in an empty wheel groove. After that, the limiting sleeve 2242a is released, and under the elastic force of the second elastic member 2242b, the limiting sleeve 2242a can automatically reset itself, restricting the pull rope 23 again so that it cannot detach from the pulley 223. Compared to the above embodiments, this embodiment has a simpler structure and lower cost. In addition to solving the problem of limiting the pull rope 23, it also solves the problem of facilitating the assembly and disassembly of the pull rope 23. Since the assembly and disassembly of the pull rope 23 can be completed by simply moving the limiting sleeve 2242a, and the second limiting rod 2242 provides support and guidance for the movement of the limiting sleeve 2242a, the reliability and stability are better.

[0062] Optionally, the second elastic element 2242b can be any one of, but not limited to, a spring, a sheet, or an elastic sleeve.

[0063] It should be noted that in both of the above embodiments, the limiting unit 224 is designed to be able to move actively, while the pulley 223 is fixedly installed.

[0064] Please continue reading. Figures 8 to 10In other embodiments, the limiting unit 224 may be fixed in place, while the pulley 223 may be movable. Specifically, the pulley frame 221 includes a carrier plate 2211 and an open side 2213 opposite to the carrier plate 2211. The pulley assembly 22 also includes an axle 225, a third elastic element 226, and a second fastener 227. One end of the axle 225 is fixed to the carrier plate 2211, and the other end is located on the open side 2213. The pulley 223 is slidably fitted onto the outside of the axle 225. The second fastener 227 is located at the end of the axle 225 away from the carrier plate 2211, and the third elastic element 226 abuts against the second fastener 227 and the pulley 223. Alternatively, the pulley frame 221 includes a carrier plate 2211, and the pulley frame 221 also has an open side 2213 opposite to the carrier plate 2211. The pulley assembly 22 also includes an axle 225, a third elastic element 226, and a second fastener 227. One end of the axle 225 is mounted on the carrier plate via the second fastener 227 (it can be a fixed connection or a detachable connection), and the other end is located on the open side 2213 and has a third limiting step. The pulley 223 is slidably fitted onto the outside of the axle 225, and the third elastic element 226 abuts against the third limiting step and the pulley 223. The function of the open side 2213 is the same as in the aforementioned embodiments, and will not be repeated here.

[0065] In the first state, under the elastic force of the third elastic element 226, the distance between the pulley 223 and the limiting unit 224 is less than the diameter of the pull rope 23, and the pull rope 23 cannot be removed from the pulley 223. When it is necessary to install or remove the pull rope 23, pull the pulley 223 in a direction away from the carrier plate 2211, that is, enter the second state. At this time, the distance between the pulley 223 and the limiting unit 224 gradually increases until it is greater than the diameter of the pull rope 23. At this time, the pull rope 23 can be removed from the pulley 223 or a new pull rope 23 can be installed. After that, release the pulley 223, the third elastic element 226 releases the elastic thrust, and the pulley 223 can move and reset itself and re-limit and cooperate with the limiting unit 224. The pull rope 23 cannot be removed from the pulley 223 due to the obstruction of the limiting unit 224. This embodiment has a simple structure and low cost. It only uses the combination of pulley 223, axle 225 and third elastic element 226, and the pulley 223 is slidably set relative to axle 225. This solves the problem of easy assembly and disassembly of the pull rope 23 while winding the rope around it, without the need to add more structural components.

[0066] Optionally, the third elastic element 226 can be any one of, but not limited to, a spring, a sheet, or an elastic sleeve. For example, in this embodiment, the third elastic element 226 is a spring.

[0067] The end of the axle 225 away from the carrier plate 2211 is provided with a threaded section. The second fastener 227 can be a nut, which is screwed onto the threaded section. The diameter of the nut is larger than the diameter of the spring, so as to limit the installation of the spring.

[0068] Alternatively, as a variation of the above embodiment, the pulley frame 221 includes a carrier plate 2211, and the pulley frame 221 also has an open side 2213 opposite to the carrier plate 2211. The pulley assembly 22 further includes an axle 225, a fourth elastic member, and a third fastener. The axle 225 slides through the carrier plate 2211, and one end of the axle 225 passing through the carrier plate 2211 is connected to the third fastener. The third fastener and the carrier plate 2211 have a travel distance, and the third fastener can limit and abut against the carrier plate 2211. The fourth elastic member is connected between the third fastener and the carrier plate 2211, and the pulley 223 is fixed to the end of the axle 225 away from the third fastener. In this case, the pulley 223 and the third fastener are located on opposite sides of the carrier plate 2211.

[0069] The only difference between this embodiment and the above embodiment is that the pulley 223 and the axle 225 are fixedly installed, and the axle 225 can slide telescopically relative to the carrier plate 2211. In the first state, under the elastic force of the fourth elastic element, the distance between the pulley 223 and the limiting unit 224 is less than the diameter of the pull rope 23, and the pull rope 23 cannot be removed. When it is necessary to disassemble and replace the pull rope 23, push the third fastener towards the open side 2213 or pull the pulley 223 to reach the second state. At this time, the distance between the pulley 223 and the limiting unit 224 gradually increases until it is greater than the diameter of the pull rope 23. At this time, the pull rope 23 can be removed from the pulley 223 or a new pull rope 23 can be replaced. Compared with the above embodiment, this embodiment can switch from the first state to the second state by operating the third fastener or by operating the pulley 223. The operation is simple and convenient, and the selectivity and reliability are higher.

[0070] Please continue reading. Figures 11 to 13 Furthermore, based on any of the above embodiments, the pulley frame 221 includes a mounting plate 2212 and a carrier plate 2211 connected to each other. The limiting unit 224 includes a positioning shaft 2243, a fifth elastic element 2243a, and a third limiting rod 2243b. The positioning shaft 2243 is fixed to one side of the carrier plate 2211. The third limiting rod 2243b is rotatably mounted on the positioning shaft 2243. The third limiting rod 2243b is connected to the mounting plate 2212 through the fifth elastic element 2243a. The third limiting rod 2243b can rotate in the radial direction of the pulley 223.

[0071] The positioning shaft 2243 extends radially along the pulley 223, thus allowing the third limiting rod 2243b to swing up and down radially along the pulley 223. In the first state, the third limiting rod 2243b moves closer to the pulley 223 under the elastic thrust of the fifth elastic member 2243a, so that the distance between the third limiting rod 2243b and the pulley 223 is less than the diameter of the pull rope 23, at which point the pull rope 23 cannot come out of the groove of the pulley 223. When it is necessary to install or remove the pull rope 23, push the third limiting rod 2243b radially away from the pulley 223 to reach the second state. At this time, the distance between the third limiting rod 2243b and the pulley 223 gradually increases until it is greater than the diameter of the pull rope 23, so that the pull rope 23 can be removed from the groove, making it convenient to replace the new pull rope 23. Then, release the third limiting rod 2243b. Under the elastic force of the fifth elastic element 2243a, the third limiting rod 2243b rotates and resets towards the pulley 223 and returns to the first state, so that the pull rope 23 installed in the groove of the pulley 223 can be re-constrained.

[0072] Furthermore, the side of the carrier plate 2211 is recessed with a limiting groove 2243c, and the positioning shaft 2243 is set at the bottom of the limiting groove 2243c. The third limiting rod 2243b can be limited and abutted against the opposite two side walls of the limiting groove 2243c, and the size of the third limiting rod 2243b is smaller than the width of the limiting groove 2243c, so that the limiting groove 2243c provides rotation space for the rotation of the third limiting rod 2243b. Of the two opposing groove walls of the limiting groove 2243c, the groove wall closer to the mounting plate 2212 is used to limit the upward rotation of the third limiting rod 2243b to prevent excessive rotation angle; the groove wall further away from the mounting plate 2212 is used to limit the downward rotation of the third limiting rod 2243b to control the distance between the third limiting rod 2243b and the pulley 223, and to prevent the third limiting rod 2243b from contacting the pull rope 23 in the pulley groove, which would cause friction and wear when the pull rope 23 slides.

[0073] To ensure the stable installation and deformation of the fifth elastic element 2243a, a positioning protrusion 2243d is provided on the side of the third limiting rod 2243b facing the mounting plate 2212, and the fifth elastic element 2243a is connected to the positioning protrusion 2243d. Specifically, the fifth elastic element 2243a is sleeved on the positioning protrusion 2243d, and the positioning protrusion 2243d plays a radial limiting role for the fifth elastic element 2243a, thereby preventing the fifth elastic element 2243a from detaching from the third limiting rod 2243b, and also facilitating the installation and removal of the fifth elastic element 2243a.

[0074] Optionally, the fifth elastic element 2243a can be any one of, but not limited to, a spring, a sheet, or an elastic sleeve. For example, in this embodiment, the fifth elastic element 2243a is a spring.

[0075] It should be noted that the appendix Figure 4 , Figure 7 , Figure 10 and Figure 13 The straight arrow in the diagram indicates the direction in which the pull rope 23 is taken out or put in.

[0076] like Figure 1 As shown in the illustration, a fitness device 100 according to an embodiment of this application includes a device body and a training arm 20, the training arm 20 being movably mounted on the device body. For example, the device body can be a fitness chair 10. The training arm 20 consists of a swing arm tube 21, a pulley assembly 22, and a pull rope 23. The pulley assembly 22 is mounted at the end of the swing arm tube 21 away from the fitness chair 10. The pulley seat 222 is rotatably connected to the swing arm tube 21, and the rotation axes of the pulley seat 222 and the swing arm tube 21 intersect with the rotation axes of the pulley frame 221 and the pulley seat 222. Preferably, in this embodiment, the two rotation axes are arranged perpendicular to each other, thereby allowing the pulley assembly 22 to provide the pull rope 23 with multiple degrees of freedom of rotation in multiple directions.

[0077] Understandably, the trainee can sit on the fitness chair 10 and perform strength training using the pull rope 23 and arm swing tube 21, which meets the trainee's needs for indoor fitness exercise. In other embodiments, the fitness equipment 100 is a wall-mounted strength training machine, which can be used for training after being installed and fixed to the wall. In other embodiments, the fitness equipment 100 is a floor-mounted strength training machine, which the user can use by standing on it. It is understood that the above is only a limited illustrative example of the fitness equipment 100 of this application, but it is not limited to this. As long as it can provide resistance for the user to perform strength training, it is acceptable, and further details will not be elaborated here.

[0078] In addition, the fitness chair 10 may also include a backrest assembly 12, the angle of which is rotatable and adjustable; a swing arm tube 21 is rotatably mounted on the backrest assembly 12; a pull rope 23 is movably mounted on the swing arm tube 21, the first end of the pull rope 23 is used to connect to the grip 30, and the second end of the pull rope 23 is used to connect to the resistance source 40. Both ends of the pull rope 23 are free ends, that is, both ends of the pull rope 23 can move freely in any direction.

[0079] Understandably, the arm swing tubes 21 are arranged in two symmetrical configurations, and there are also two corresponding pull ropes 23 and pulley assemblies 22. The pull ropes 23 and pulley assemblies 22 are connected to the arm swing tubes 21 one by one, so as to meet the needs of trainees to perform strength training with both arms at the same time.

[0080] When using the fitness equipment 100 described above, the user can comfortably sit on the fitness chair 10 after adjusting the backrest assembly 12 to the desired angle. This allows for routine training exercises such as horizontal pushes and upward pushes. Furthermore, by further rotating and adjusting the arm swing tube 21 and the backrest assembly 12, the arm swing tube 21 can be positioned at the appropriate height and width. The user can then grip the handle 30 and perform high pull exercises with the assistance of the resistance source 40. Compared to existing technologies, the fitness equipment 100 in this solution can meet the user's needs for various training exercises, including horizontal pushes, upward pushes, and high pulls, providing a richer training program and enhancing the user experience.

[0081] In addition, the fitness chair 10 also includes a seat frame 11 and a seat cushion 13. The seat cushion 13 is mounted on top of the seat frame 11 and positioned near one end to facilitate seated training for the user.

[0082] The backrest assembly 12 also includes a back cushion, a backrest support, and an angle adjustment assembly. The back cushion is mounted on the backrest support and faces the seat cushion 13. The backrest support is rotatably mounted on the seat frame 11 via the angle adjustment assembly. By operating the angle adjustment assembly, the backrest support can rotate up and down relative to the seat frame 11, thereby flexibly adjusting the tilt angle of the backrest assembly 12 to meet the needs of trainees in different sitting or lying positions.

[0083] It should be noted that the minimum limit angle adjustment stroke of the angle adjustment component is to make the backrest support and back cushion horizontal or nearly horizontal. At this time, the back cushion and the seat cushion 13 are parallel or nearly parallel and in the same plane, making the trainee more comfortable when lying flat.

[0084] The aforementioned grip 30 can be a handle, a long bar, or other equipment. Different grips 30 can be selected depending on the different training movements. For example, in this design, the grip 30 is in the form of a handle, which is not only aesthetically pleasing but also makes it easier for the trainee to hold the grip stably.

[0085] Preferably, the handle is covered with a rubber sleeve, which can further increase friction and prevent slippage that could lead to safety hazards.

[0086] In addition, the swing arm tube 21 adopts a telescopic structure design, so that the length of the swing arm tube 21 is adjustable. In this way, it is not only easy to make adaptive adjustments to the swing arm tube 21 according to the user's required training width, height, etc., but also to avoid interference and collision between the swing arm tube 21 and the seat frame 11 when the whole machine is stored.

[0087] The resistance source 40 is set as a strength training machine. The bottom of the fitness chair 10 is equipped with height-adjustable foot pads. For floor-mounted strength training machines, the machine can be placed under the seat frame 11. By adjusting the distance between the height-adjustable foot pads and the machine, the seat frame 11 and the machine are tightly pressed together, ensuring safety and stability during training. Then, the resistance cable 23 is connected to the machine to begin strength training. For wall-mounted strength training machines, the resistance cable 23 can be directly connected to the machine for training.

[0088] When a strength training machine is used, the resistance is provided by the machine's resistance output device. This device provides a force in the opposite direction to the direction in which the trainee pulls the rope 23, thus meeting the trainee's upper limb strength training needs. Optionally, the resistance output device can be a motor, electromagnetic actuator, spring, flywheel, friction plate, or other device that provides resistance.

[0089] For example, the height-adjustable foot pad is a stud foot pad, which is screwed to the bottom of the fitness chair 10 and can be raised and lowered by screwing. The installation structure is simple and the adjustable operation is strong.

[0090] Alternatively, as an alternative to the above embodiment, the resistance source 40 can also be a counterweight. The counterweight is located on one side of the seat frame 11, and strength training can be performed after connecting the pull rope 23 to the counterweight. In this case, the gravity of the counterweight provides the resistance required for the trainee's upper limb strength training, and the counterweight is simpler, more practical, and has a lower cost.

[0091] Alternatively, as another alternative to the above embodiment, the pull rope 23 can be an elastic rope, and the end of the pull rope 23 used to connect to the resistance source 40 can be connected to any fixed device. The fixed device can be a door, wall, ground, bracket, table leg, etc., in which case the pull rope 23 can provide the resistance required for training. This implementation provides training resistance in a simple, convenient, versatile, and low-cost manner, and can adapt to training needs in various training environments.

[0092] The fitness equipment 100 provided in this embodiment, while fulfilling the functional requirements of the existing fitness chair 10, also allows trainees to perform strength training exercises such as pushing, flattening, and high pulling by connecting one free end of the pull rope 23 to different resistance sources 40 and the other free end to the grip 30. The resistance sources 40 can be flexibly selected according to the trainee's training environment, and different resistance sources 40 can provide different levels of resistance. Trainees can flexibly choose different types of resistance sources 40 to connect to the fitness equipment 100 for training according to their own training needs. That is, the fitness equipment 100 does not need to have its own expensive resistance output device such as a motor, and it can be adapted to various resistance sources 40 on the market to provide strength training for trainees. The resistance provision method is convenient, diverse, and lower in cost. The pull rope 23 of the fitness equipment 100, while ensuring a reliable connection with the resistance source 40, also avoids the limitation of some resistance sources 40 having insufficient length of their own pull rope 23. In addition, by movably setting the pull rope 23 on the swing arm tube 21 and rotatably setting the swing arm tube 21 on the backrest assembly 12, the angle of the swing arm tube 21 relative to the backrest assembly 12 can be adjusted so that the swing arm tube 21 is in a suitable position of the required height and width, thus meeting the training needs of trainees for different heights and widths.

[0093] It should also be noted that when the pulley assembly of this application is mounted on a fitness accessory, such as the aforementioned fitness chair, it is not necessary to configure a pull rope separately on the pulley assembly. The pull rope that comes with the strength training machine can be pulled out directly and hung on the pulley assembly for training.

[0094] Of course, in other embodiments, the fitness equipment 100 can also be other types of strength training equipment without training arms. In this case, the pulley assembly 22 can be directly installed on the main body of the strength training equipment, and the pull rope 23 is assembled with the pulley assembly 22, so that the trainee can perform the corresponding strength training.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0097] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0098] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0099] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0100] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0101] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A pulley assembly, characterized in that, include: Pulley frame; A pulley, mounted on a pulley frame, with a groove in the pulley for winding a rope; and A limiting unit is mounted on the pulley frame, and the limiting unit and the pulley are movable relative to each other; The pulley frame includes a carrier plate, and the pulley frame also has an open side opposite to the carrier plate. The limiting unit includes a first limiting rod and a first elastic member. The carrier plate has a sliding hole, and the first limiting rod slides through the sliding hole. The end of the first limiting rod away from the carrier plate is provided with a first limiting step, and the first elastic member abuts against the first limiting step and the carrier plate. Alternatively, the pulley frame includes a carrier plate, and the pulley frame also has an open side opposite to the carrier plate. The limiting unit includes a second limiting rod, a limiting sleeve, and a second elastic member. The first end of the second limiting rod is fixed to the carrier plate, and the second end of the second limiting rod away from the carrier plate is provided with a second limiting step. The limiting sleeve is slidably sleeved outside the second limiting rod, and the second elastic member abuts between the limiting sleeve and the carrier plate. Alternatively, the pulley frame includes a mounting plate and a carrier plate connected together, and the limiting unit includes a positioning shaft, a fifth elastic element and a third limiting rod. The positioning shaft is fixed to one side of the carrier plate, and the third limiting rod is rotatably mounted on the positioning shaft. The third limiting rod is connected to the mounting plate through the fifth elastic element, and the third limiting rod can rotate in the radial direction of the pulley. In the first state, the gap between the limiting unit and the pulley is smaller than the diameter of the pull rope. In the second state, the gap between the limiting unit and the pulley is larger than the diameter of the pull rope. The first state is the initial state of the limiting unit and the pulley.

2. The pulley assembly according to claim 1, characterized in that, The limiting unit and / or the pulley are slidably disposed relative to the pulley frame; or, the limiting unit and / or the pulley are rotatably disposed relative to the pulley frame.

3. The pulley assembly according to claim 2, characterized in that, The limiting unit and / or the pulley can automatically return from the second state to the first state.

4. The pulley assembly according to claim 2, characterized in that, The limiting unit further includes a first fastener, one end of the first limiting rod extending out of the sliding hole is connected to the first fastener, and the first fastener abuts against the side wall of the carrier plate away from the open side.

5. The pulley assembly according to claim 2, characterized in that, The pulley frame includes a carrier plate and an open side opposite to the carrier plate. The pulley assembly also includes an axle, a third elastic element, and a second fastener. One end of the axle is fixed to the carrier plate, and the other end is located on the open side. The pulley is slidably fitted onto the outside of the axle. The second fastener is located at the end of the axle away from the carrier plate, and the third elastic element abuts against the second fastener and the pulley.

6. The pulley assembly according to claim 2, characterized in that, The pulley frame includes a carrier plate and an open side opposite to the carrier plate. The pulley assembly also includes an axle, a third elastic element, and a second fastener. One end of the axle is mounted on the carrier plate by the second fastener, and the other end is located on the open side and is provided with a third limiting step. The pulley is slidably fitted onto the outside of the axle, and the third elastic element abuts against the third limiting step and the pulley.

7. The pulley assembly according to claim 2, characterized in that, The pulley frame includes a carrier plate and an open side opposite to the carrier plate. The pulley assembly also includes an axle, a fourth elastic element, and a third fastener. The axle slides through the carrier plate, and one end of the axle passing through the carrier plate is connected to the third fastener. The third fastener and the carrier plate have a travel distance, and the third fastener can limit and abut against the carrier plate. The fourth elastic element is connected between the third fastener and the carrier plate, and the pulley is fixed at the other end of the axle away from the third fastener.

8. The pulley assembly according to claim 1, characterized in that, The side of the carrier plate is recessed with a limiting groove, the positioning shaft is set at the bottom of the limiting groove, the size of the third limiting rod is smaller than the width of the limiting groove, and the third limiting rod can be limited and abutted against the opposite two side walls of the limiting groove. The third limiting rod has a positioning protrusion on the side facing the mounting plate, and the fifth elastic element is connected to the positioning protrusion.

9. A training arm, characterized in that, include: Swing arm tube; as well as The pulley assembly as described in any one of claims 1 to 8, wherein the pulley assembly is mounted at the end of the swing arm tube.

10. A fitness device, characterized in that, include: Equipment body; as well as The training arm as described in claim 9, wherein the training arm is movably mounted on the device body; or, The pulley assembly as described in any one of claims 1 to 8, wherein the pulley assembly is disposed on the main body of the device.

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