Stretcher

Abstract

The utility model provides a stretcher, which relates to the technical field of sports equipment and comprises a support frame, a group of mounting holes are arranged at the bottom of the support frame, the mounting holes are of cylindrical structures, two sides of the support frame are respectively provided with a stabilizing frame, and a group of positioning structures are respectively arranged above each stabilizing frame. Each positioning structure is composed of a positioning rod, a positioning shell and a cover plate, and a stretching structure is installed between the two positioning structures. The stretcher combines multiple exercise modes of arm strength training, independent leg pressing and tendon stretching and passive leg stretching, different exercise requirements are met, the physical quality is comprehensively improved, for example, a user can enhance the upper limb strength through arm strength training, and the leg flexibility can be improved by means of leg pressing and tendon stretching actions.

Description

Technical Field

[0001] This utility model relates to the field of sports equipment technology, and in particular to a stretcher. Background Technology

[0002] Stretching is a crucial part of physical exercise, helping to improve flexibility, prevent sports injuries, and promote muscle recovery. Stretching exercises for the legs and arms are included in physical training. However, existing sports stretching equipment has several shortcomings, as follows:

[0003] Take pull-up exercises as an example. Traditional pull-up equipment usually consists of a simple bracket that is fixed with bolts. During pull-ups, due to the lack of cushioning design, the impact between the exerciser's body and the equipment can easily cause the bracket to bend and the bolts to loosen. The bracket of the equipment is prone to shaking during use, which affects the training effect and brings safety hazards.

[0004] For those with weak arm strength or those who are new to stretching, standard-sized equipment may be too difficult for them when they stretch alone, and may even lead to the risk of muscle strain. For those with a certain level of exercise experience, the equipment may not be able to meet their needs for further improvement.

[0005] Currently, most home fitness equipment on the market has a relatively single function. For example, arm strength bars are mainly used for strength and muscle stretching training, while yoga mats focus on flexibility exercises. If users want to do a variety of exercises, they need to purchase a variety of equipment, which not only takes up a lot of space but also increases economic costs. Utility Model Content

[0006] This utility model discloses a stretching device. Before performing arm strength training, athletes should first adjust their standing posture, with feet shoulder-width apart, body straight, and knees slightly bent to maintain balance and stability. Then, extend both hands naturally and grasp the rubber sleeves on the stabilizing bars, ensuring a moderate grip that is firm but not too forceful, which could lead to hand fatigue. After grasping the rubber sleeves, apply pressure evenly to both sides using arm muscle strength, causing the pressure spring between the two stabilizing bars to gradually bend. During the application of pressure, pay attention to controlling the rhythm and range of motion, maintaining even breathing, and avoiding holding your breath. This action can be repeated according to one's physical strength and training goals. Each movement should aim to maximize the bending of the pressure spring to fully exercise arm muscle strength and complete the arm strength training steps.

[0007] In a first aspect, this disclosure provides a tensioner, specifically comprising: a support frame, wherein a set of mounting holes are formed at the bottom of the support frame, the mounting holes being cylindrical structures, a stabilizing frame is installed on each of the two sides of the support frame, and a set of positioning structures is installed above each stabilizing frame, the positioning structure comprising a positioning rod, a positioning housing, and a cover plate, and a tensioning structure is installed between the two sets of positioning structures, the tensioning structure comprising a stabilizing rod, a rubber sleeve, a connecting rope, and a foot pedal.

[0008] Furthermore, the support frame is provided with two positioning plates, which are U-shaped structures. A rotating hole is opened on each side of the positioning plate, and a roller is installed at the position of the rotating hole. The connecting rope is wrapped around the outside of the roller.

[0009] Furthermore, an adjustment hole with a rectangular structure is provided on one side of the stabilizing frame, and a sliding hole with a cylindrical structure is provided on the other side of the stabilizing frame. The stabilizing frame is installed on both sides of the support frame in conjunction with the adjustment hole, and a locking bolt is installed on one side of the stabilizing frame.

[0010] Furthermore, a positioning rod is provided at the bottom of the positioning housing. The positioning rod passes through a sliding hole on the other side of the positioning housing, and a support spring and a nut are installed on the outside of the positioning rod.

[0011] Furthermore, a swing groove is provided at the upper and lower positions of the positioning housing. The swing groove has a U-shaped structure. An integral swing block is provided at the bottom of the cover plate. The swing block extends into the swing groove at the lower position of the positioning housing. A pin is installed at the middle position of the swing block. A hinged threaded rod is installed at the inner side of the swing groove at the upper position of the positioning housing. A wing nut is installed at the outer side of the threaded rod.

[0012] Furthermore, there are two stabilizing rods, and a positioning block is provided on one side of each stabilizing rod. The positioning block has a rectangular structure, and a stepped groove is opened on the inner side of the positioning housing. The positioning block is installed inside the stepped groove, and a pressure spring is installed between the two stabilizing rods. The pressure spring has a tension spring structure.

[0013] Furthermore, a hidden groove is provided on each side of the rubber sleeve, and a binding strap is wrapped around the hidden groove. A butt joint is provided on one side of the rubber sleeve.

[0014] Furthermore, a rubber sleeve is wrapped around the outer side of the stabilizing rod, and the inner wall of the rubber sleeve is tightly fitted to the outer wall of the stabilizing rod. A hook is installed in the middle of the rubber sleeve, one side of the connecting rope is wrapped around the upper part of the hook, and a foot pedal is installed on the other side of the connecting rope.

[0015] This utility model provides a tensioner with the following beneficial effects:

[0016] This stretching device combines arm strength training, self-directed leg stretching, and passive leg stretching to meet different exercise needs and comprehensively improve physical fitness. For example, users can enhance upper limb strength through arm strength training and improve leg flexibility through leg stretching and leg pressing movements.

[0017] The stability frame can be easily adjusted up and down via adjustment holes and locking bolts, accommodating exercisers of different heights and providing a personalized exercise experience. For example, both tall and short exercisers can adjust the device according to their own situation to ensure exercise effectiveness and comfort.

[0018] It features a replaceable rubber sleeve made of soft rubber with good friction and elasticity, which not only increases grip comfort but also protects the pressure spring and extends its service life. During exercise, the user's hand can have a comfortable grip experience while the pressure spring is effectively protected.

[0019] The roller design reduces friction from the moving connecting ropes, making pedal movement smoother and improving the fluidity and effectiveness of the workout. When stretching legs, the pedals move more steadily, allowing the exerciser to experience a more natural stretching process.

[0020] The pull-up technique incorporates a support spring that elastically supports the stabilizing bar and rubber sleeve upwards, thus mitigating the vibration force exerted on the stabilizing bar, rubber sleeve, and support frame by the person performing the pull-up for the first time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0022] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the present invention.

[0023] In the attached diagram:

[0024] Figure 1 A schematic diagram of the axial structure of the tensioner after assembly is shown;

[0025] Figure 2 This application shows Figure 1 A schematic diagram of the axonal structure from the rear view;

[0026] Figure 3 This application shows Figure 1 A schematic diagram of the axonal structure from an elevation viewpoint;

[0027] Figure 4 The image shows a partial cross-sectional view of the positioning structure and tension structure of this application.

[0028] Figure 5 An axonometric schematic diagram of the cross-sectional structure of the stabilizing frame of this application is shown;

[0029] Figure 6 This paper shows a schematic diagram of the stabilizing frame from a cross-sectional tilting perspective.

[0030] Figure 7 A schematic diagram of the axial structure of the stabilizing rod and rubber sleeve of this application is shown;

[0031] Figure 8 This application shows Figure 4 A magnified structural diagram at point A.

[0032] List of reference numerals

[0033] 1. Support frame;

[0034] 2. Stable frame;

[0035] 3. Positioning structure; 301. Positioning housing; 302. Positioning rod; 303. Cover plate;

[0036] 4. Tension structure; 401. Stabilizing bar; 402. Rubber sleeve; 403. Connecting rope; 404. Foot pedal. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0038] Example 1: Please refer to Figures 1 to 8 :

[0039] This utility model proposes a tensioner, including: a support frame 1, with a set of mounting holes at the bottom of the support frame 1. The mounting holes are cylindrical, allowing the operator to install anchor bolts at the mounting holes to stably install the support frame 1 on the ground. A stabilizing frame 2 is installed on each of the two sides of the support frame 1. An adjustment hole with a rectangular structure is opened on one side of the stabilizing frame 2, and a sliding hole with a cylindrical structure is opened on the other side of the stabilizing frame 2. The stabilizing frame 2 is installed on both sides of the support frame 1 in conjunction with the adjustment holes. A locking bolt is installed on one side of the stabilizing frame 2. The operator can tighten the locking bolt with a wrench to stabilize the stabilizing frame 2 on the outside of the support frame 1. After the operator loosens the locking bolt with a wrench, the stabilizing frame 2 can be adjusted up and down.

[0040] In this embodiment of the disclosure, reference is made to Figures 1 to 8 As shown, a set of positioning structures 3 are installed above each of the stabilizing frames 2. The positioning structure 3 is composed of a positioning rod 302, a positioning housing 301, and a cover plate 303. A positioning rod 302 is provided at the bottom of the positioning housing 301. The positioning rod 302 passes through a sliding hole on the other side of the positioning housing 301. A support spring and a nut are installed on the outside of the positioning rod 302. The nut positions the bottom of the support spring. The positioning rod 302 achieves the effect of lateral positioning of the positioning housing 301. The support spring provides elastic support to the overall structure of the positioning structure 3 upwards. A set of tension structure 4 is installed between the two sets of positioning structures 3. The tension structure 4 is composed of a stabilizing rod 401, a rubber sleeve 402, a connecting rope 403, and a foot pedal 404.

[0041] In this embodiment of the disclosure, reference is made to Figures 1 to 8 As shown, a swing groove is formed at the top and bottom of the positioning housing 301. The swing groove has a U-shaped structure. An integral swing block is provided at the bottom of the cover plate 303. The swing block extends into the swing groove below the positioning housing 301. A pin is installed in the middle of the swing block. After installation, the pin hinges the cover plate 303 to one side of the positioning housing 301. After the stabilizing rod 401 is installed, the operator flips the cover plate 303 upward and locks it with a wing nut. At this time, the cover plate 303 is positioned relative to the installation position of the stabilizing rod 401. The stabilizing rod 401 can be easily removed by flipping the cover plate 303 downwards. A hinged threaded rod is installed on the inner side of the swing groove above the positioning housing 301, and a wing nut is installed on the outer side of the threaded rod. Two positioning plates are provided at the position of the support frame 1. The positioning plates have a U-shaped structure. A rotating hole is opened on each side of the positioning plate. A roller is installed at the position of the rotating hole. The connecting rope 403 is wrapped around the outer side of the roller. The roller supports the upper part of the connecting rope 403, reducing the friction of the connecting rope 403 when it moves.

[0042] In this embodiment of the disclosure, reference is made to Figures 1 to 8As shown, there are two stabilizing rods 401. A positioning block is provided on one side of each stabilizing rod 401. The positioning block has a rectangular structure. A stepped groove is formed on the inner side of the positioning housing 301, and the positioning block is installed inside the stepped groove. Therefore, after the stabilizing rod 401 is installed in the position of the positioning housing 301, it can cooperate with the stepped groove and the positioning block to achieve the effect of positioning the installation position. A pressure spring is installed between the two stabilizing rods 401. The pressure spring is a tension spring structure. The operator selects the corresponding pressure spring according to the required pressure (in kilograms). Referring to the existing arm strength bar mechanism, for example, the pressure spring requires a force of 30 kilograms to bend. For physical exercise, the stabilizing rod 401 and rubber sleeve 402 can be removed and used separately. The person exercising holds the stabilizing bar 401 with both hands and applies pressure to complete the arm strength training steps. A hidden groove is opened on each side of the rubber sleeve 402. A binding strap is wrapped around the hidden groove. The operator needs to refer to the existing technology to add Velcro to the binding strap so that the binding strap is wrapped around the hidden groove and then the rubber sleeve 402 is tightened. There is a butt joint on one side of the rubber sleeve 402. The butt joint and the binding strap are designed to facilitate the installation and replacement of the rubber sleeve 402. After the rubber sleeve 402 is installed, it protects the pressure spring. In addition, the person exercising holds the two sides of the rubber sleeve 402 with both hands and begins the body upward step to complete the arm stretching and arm strength training steps.

[0043] In this embodiment of the disclosure, reference is made to Figures 1 to 8 As shown, a rubber sleeve 402 is wrapped around the outer side of the stabilizing rod 401. The inner wall of the rubber sleeve 402 is tightly fitted to the outer wall of the stabilizing rod 401. The rubber sleeve 402 is made of soft rubber, which has good friction and elasticity properties in existing technology. A hook is installed in the middle of the rubber sleeve 402. One side of the connecting rope 403 is wrapped around the top of the hook. The operator needs to tie a knot between the hook and the connecting rope 403 to secure one end of the hook to the connecting rope 403. A foot pedal 404 is installed on the other side of the connecting rope 403. When the stabilizing rod 401... After the installation position is stable, the foot pedal 404 is flexibly positioned and stretched with the help of the connecting rope 403. The person exercising steps on the foot pedal 404 with one foot, and at this time the person's leg is bent. At this time, the person exercising can independently perform leg press and muscle stretch. In addition, the person exercising can loosen the locking bolt of the stabilizing frame 2. One person exercising can move the stabilizing rod 401 up and down. At this time, the foot pedal 404 moves up and down under force. Another person exercising can then step on the foot pedal 404 with one foot to passively stretch their leg.

[0044] Example 2, based on Example 1, with reference to Figures 1 to 8As shown, the specific sizes of the support frame 1, the stabilizing frame 2, the positioning housing 301, the positioning rod 302, the cover plate 303, the stabilizing rod 401, the rubber sleeve 402, and the foot pedal 404 are processed by the staff according to their needs.

[0045] The working principle of this embodiment:

[0046] The installation and adjustment steps for the stabilizing frame 2 are as follows: The operator aligns the side of the stabilizing frame 2 with the rectangular adjustment hole with the support frame 1, and slowly moves the stabilizing frame 2 to precisely align the adjustment hole with the corresponding position pre-set on the support frame 1. At the same time, the operator smoothly inserts the cylindrical sliding hole on the other side of the stabilizing frame 2 into the corresponding protruding part of the support frame 1, ensuring a tight fit. Then, use a wrench to tighten the locking bolt on one side of the stabilizing frame 2. During the tightening process, pay attention to the fit between the stabilizing frame 2 and the support frame 1 to ensure that the stabilizing frame 2 is firmly fixed on both sides of the support frame 1 without loosening or shaking. If it is necessary to adjust the height of the stabilizing frame 2 according to the height of the exerciser or different exercise needs during subsequent use, the operator can use a wrench to loosen the locking bolt to allow the stabilizing frame 2 to move freely up and down on the support frame 1. After moving to the appropriate height, use a wrench again to tighten the locking bolt with appropriate force to fix the stabilizing frame 2 in the new position to ensure the stability of the device during use.

[0047] The installation steps for positioning structure 3 are as follows: The operator carefully inserts positioning rod 302 through the pre-drilled hole at the bottom of positioning housing 301. Then, positioning rod 302 is passed through the sliding hole on the other side of the stabilizing frame 2, establishing a connection between positioning housing 301 and stabilizing frame 2. With the positioning rod 302 extending outwards from the stabilizing frame 2, the support spring and nut are installed sequentially. When installing the support spring, ensure that both ends of the spring are in close contact with positioning rod 302 and the nut, and that the spring is in a naturally extended state without twisting or deformation. By rotating the nut, its position on positioning rod 302 is gradually adjusted, accurately positioning the bottom of the support spring. This achieves the lateral positioning function of positioning rod 302 on positioning housing 301. Simultaneously, the elasticity of the support spring provides upward elastic support for the entire positioning structure 3, offering a stable foundation for subsequent operations.

[0048] The key step in completing the installation of positioning structure 3 is to install cover plate 303. The operator accurately aligns the swing block at the bottom of cover plate 303 with the U-shaped swing groove below positioning housing 301, and slowly inserts the swing block into the swing groove, ensuring that the swing block fits tightly against the inner wall of the swing groove without any obvious gap. After the swing block is inserted into place, a pin is installed in the reserved hole in the middle of the swing block, so that the pin passes through the corresponding part of the swing block and positioning housing 301. When installing the pin, pay attention to the direction and position of the pin to ensure that it can rotate freely and will not come out. After installation, check by manual operation whether cover plate 303 can be flexibly hinged and positioned on one side of positioning housing 301 around the pin, in preparation for the subsequent installation and fixation of stabilizing rod 401.

[0049] The installation steps for tension structure 4 are as follows: The operator picks up two stabilizing rods 401 and carefully observes the side with the rectangular positioning block to ensure that the positioning block is not deformed or damaged. Align the positioning blocks of the two stabilizing rods 401 with the stepped grooves on the inner side of the positioning housing 301, and slowly and steadily insert the positioning blocks into the stepped grooves. During the insertion process, pay attention to ensuring that the positioning blocks fit tightly with each side of the stepped groove to ensure that the installation position of the stabilizing rods 401 on the positioning housing 301 is accurate and there is no shaking or displacement. After the two stabilizing rods 401 are installed in place, install the pressure spring between them. When selecting the pressure spring, it is necessary to make a reasonable selection based on the individual's exercise intensity and needs. For example, if the exerciser wants to perform a higher intensity exercise, a pressure spring that requires 30 kg of force to bend can be selected. When installing the pressure spring, ensure that both ends of the spring are firmly connected to the corresponding connection points on the two stabilizing rods 401 to ensure that the spring can work normally when under force and will not fall off or loosen.

[0050] To install the rubber sleeve 402, the operator aligns the side of the rubber sleeve 402 with the butt joint gap with the stabilizing rod 401 and slowly slips the rubber sleeve 402 onto the outside of the stabilizing rod 401, ensuring that the inner wall of the rubber sleeve 402 fits tightly against the outer wall of the stabilizing rod 401 to provide a good grip and friction. The rubber sleeve 402 has pre-installed binding straps in the hidden grooves on both sides. The binding straps are removed from the hidden grooves and, following the existing method of using Velcro, are wrapped around the rubber sleeve 402 and secured using the Velcro. During the wrapping process, care must be taken to adjust the tightness of the binding straps; it should not be too tight, causing the rubber sleeve 402 to deform and affecting its performance, nor should it be too loose, causing the rubber sleeve 402 to slip on the stabilizing rod 401. This design not only facilitates the installation and replacement of the rubber sleeve 402, but also effectively protects the pressure spring during use, extending its service life.

[0051] For the installation of the connecting rope 403 and the foot pedal 404, the operator carefully wraps one end of the connecting rope 403 around the hook in the middle of the rubber sleeve 402. When wrapping, ensure the connecting rope 403 is tightly wrapped around the hook and that the number of wraps is sufficient to ensure a secure connection. After wrapping, further secure the connecting rope 403 to the hook by tying a knot to prevent the connecting rope 403 from falling off during use. The other end of the connecting rope 403 is then installed onto the foot pedal 404. During installation, ensure the connection between the connecting rope 403 and the foot pedal 404 is secure and reliable. This can be achieved by knotting, sewing, or using a special connector. At this point, the connecting rope 403 will pass over the roller at the positioning plate on the support frame 1. The roller effectively reduces friction during movement, allowing the foot pedal 404 to move more smoothly under the influence of the connecting rope 403. This provides flexible positioning and stretching functions for the foot pedal 404, offering a stable and comfortable exercise experience for the user.

[0052] Self-exercise operation steps (arm strength training): Before performing arm strength training, athletes should first adjust their standing posture, with feet shoulder-width apart, body straight, and knees slightly bent to maintain balance and stability. Then, extend both hands naturally and grasp the rubber sleeves 402 on the stabilizing bar 401, ensuring that the grip strength is moderate—firm enough to hold the rubber sleeves 402 without causing hand fatigue due to excessive force. After grasping the rubber sleeves 402, apply pressure evenly to both sides using the muscle strength of the arms, causing the pressure spring between the two stabilizing bars 401 to gradually bend. During the application of pressure, pay attention to controlling the rhythm and range of motion, maintaining even breathing, and avoiding holding your breath. This action can be repeated according to one's own physical strength and training goals. Each movement should aim to maximize the bending of the pressure spring to fully exercise the arm muscle strength and complete the arm strength training steps.

[0053] Before performing voluntary leg presses and stretches, exercisers should warm up their leg joints, such as rotating their ankles and bending and straightening their knees, to prevent injuries during exercise. Then, place one foot firmly on the foot pedal 404, ensuring full contact between the sole of the foot and the pedal, and that the body's center of gravity is stably positioned on the pedal. Bend the leg naturally and control the up-and-down movement of the foot pedal 404 by contracting and relaxing the leg muscles, thereby driving rhythmic stretching and bending movements of the leg. When performing leg presses and stretches, gradually increase the range of motion of the leg, but do not overexert yourself to avoid muscle strain. Adjust the intensity and frequency of the movements according to your own flexibility and exercise needs. For example, hold the stretch for a certain period of time each time, then relax, and repeat several times to achieve good leg press and stretching effects.

[0054] The passive exercise procedure is as follows: For passive leg stretching exercises, one person should first use a wrench to loosen the locking bolts of the stabilizer 2. During loosening, care should be taken to control the force to avoid damaging the bolts or causing the stabilizer 2 to suddenly slip. After loosening the bolts, the person exercising can move the stabilizer 401 up and down according to the other person's height, leg length, and the required stretching intensity. While moving the stabilizer 401, observe the movement of the connecting rope 403 and the foot pedal 404 to ensure they move smoothly along with the stabilizer 401. The other person exercising... After preparation, the person carefully places one foot on the foot pedal 404, keeping their body upright. They can hold onto a fixed object nearby for balance. At this time, the person moving the stabilizing bar 401 slowly and evenly controls the movement range and speed of the stabilizing bar 401 based on the user's feelings and feedback. This causes the foot pedal 404 to passively stretch the user's legs. During the stretching process, both parties should maintain good communication. The person moving the stabilizing bar 401 should adjust the intensity and rhythm of the stretching in a timely manner according to the user's physical reaction to avoid injury caused by overstretching and ensure the safety and effectiveness of the exercise process.

[0055] The disassembly and storage steps of the stretcher are as follows: After exercise, if the stabilizing bar 401 needs to be removed, first flip the cover plate 303 downwards. During the flipping process, be careful to avoid collision between the cover plate 303 and surrounding parts. After flipping it into place, the stabilizing bar 401 can be easily removed from the stepped groove of the positioning housing 301. If the rubber sleeve 402 needs to be replaced, first unfasten the Velcro of the binding strap and remove the binding strap from the rubber sleeve 402. Then, carefully remove the rubber sleeve 402 from the stabilizing bar 401 through the joint gap of the rubber sleeve 402. When replacing the new rubber sleeve 402, follow the above steps for installing the rubber sleeve 402. If the entire device needs to be stored, first use a wrench to loosen the anchor bolts and completely remove the anchor bolts from the ground. Then, carefully lift the support frame 1 from the ground and place it in a suitable position. Next, disassemble each component of the stabilizing frame 2, positioning structure 3, and stretching structure 4 in sequence and store them properly to avoid loss or damage of components for future use.

[0056] The following points should be noted in this article:

[0057] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0058] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0059] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A tensioner, comprising: The support frame (1), positioning structure (3), and tension structure (4) are provided. A set of mounting holes are provided at the bottom of the support frame (1). The mounting holes are cylindrical. A stabilizing frame (2) is installed on each side of the support frame (1). A set of positioning structures (3) is installed above each stabilizing frame (2). The positioning structure (3) is composed of a positioning rod (302), a positioning housing (301), and a cover plate (303). A positioning rod (302) is provided at the bottom of the positioning housing (301). The positioning rod (302) passes through a sliding hole on the other side of the positioning housing (301). A support spring and a nut are installed on the outside of the positioning rod (302). A tension structure (4) is installed between the two sets of positioning structures (3). The tension structure (4) is composed of a stabilizing rod (401), a rubber sleeve (402), a connecting rope (403), and a foot pedal (404).

2. The tensioner according to claim 1, characterized in that, The support frame (1) is provided with two positioning plates. A rotating hole is opened on each side of the positioning plate. A roller is installed at the position of the rotating hole, and the connecting rope (403) is wrapped around the outside of the roller.

3. The tensioner according to claim 1, characterized in that, An adjustment hole is provided on one side of the stabilizing frame (2), and a sliding hole is provided on the other side of the stabilizing frame (2). The sliding hole is a cylindrical structure. The stabilizing frame (2) is installed on both sides of the support frame (1) in conjunction with the adjustment hole. A locking bolt is installed on one side of the stabilizing frame (2).

4. A tensioner according to claim 1, characterized in that, The positioning housing (301) has a swing groove at the top and bottom respectively. The bottom of the cover plate (303) is provided with an integral swing block. The swing block extends into the swing groove below the positioning housing (301). A pin is installed in the middle of the swing block. A hinged threaded rod is installed on the inner side of the swing groove above the positioning housing (301). A wing nut is installed on the outer side of the threaded rod.

5. A tensioner according to claim 1, characterized in that, There are two stabilizing rods (401). A positioning block is provided on one side of the stabilizing rod (401). The positioning block has a rectangular structure. A stepped groove is opened on the inner side of the positioning housing (301). The positioning block is installed inside the stepped groove. A pressure spring is installed between the two stabilizing rods (401).

6. A tensioner according to claim 1, characterized in that, A hidden groove is provided on each side of the rubber sleeve (402), and a binding strap is wrapped around the hidden groove. A butt joint is provided on one side of the rubber sleeve (402).

7. A tensioner according to claim 1, characterized in that, A rubber sleeve (402) is wrapped around the outer side of the stabilizing rod (401). The inner wall of the rubber sleeve (402) and the outer wall of the stabilizing rod (401) are tightly fitted. A hook is installed in the middle of the rubber sleeve (402). One side of the connecting rope (403) is wrapped around the upper part of the hook. A foot pedal (404) is installed on the other side of the connecting rope (403).

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