An elastic cord with adjustable length

Abstract

This utility model relates to the field of elastic rope technology, specifically an adjustable-length elastic rope, comprising an elastic rope body, with limiting handles sleeved at both ends of the elastic rope body. Two sets of clamping handles are inserted into the surface of the limiting handles, and a limiting cover is screwed onto one end of each limiting handle. The limiting cover pushes the clamping handles to clamp the elastic rope body. Traction ropes are bolted to both sides of the limiting handles. The advantages are: through a unique structural design, the length of the elastic rope body can be quickly and easily adjusted. Users only need to screw on the limiting cover to easily release or release the clamping handles from the elastic rope body, thus freely tractioning the elastic rope body to move within the limiting handles. After adjusting to the desired length, the limiting cover is then screwed back to lock it. The entire adjustment process requires no additional tools, is simple and easy to understand, greatly improving the convenience and efficiency of use, and meeting the user's need to quickly adjust the length of the elastic rope in different scenarios.

Description

Technical Field

[0001] This utility model relates to the field of elastic ropes, specifically an elastic rope with adjustable length. Background Technology

[0002] Elastic bands are widely used as a common assistive tool in fitness, sports training, and daily rehabilitation exercises. Thanks to their excellent elasticity, they can provide users with varying levels of resistance to meet diverse training needs, such as strength training and flexibility training.

[0003] However, existing resistance bands have some obvious limitations in practical use. Firstly, most resistance bands have a fixed length, which limits their applicability to a limited range of scenarios. Different exercise movements, user physical conditions (such as height and arm length), and exercise environments all require different resistance band lengths. Fixed-length resistance bands cannot be flexibly adjusted to these specific conditions, and users may need to perform additional operations (such as folding or wrapping) to change the effective length. This is not only inconvenient but may also affect exercise results and even pose safety hazards.

[0004] On the other hand, while some adjustable-length elastic bands can achieve length changes, the adjustment methods are often inconvenient and unstable. Some adjustment structures are complex in design, requiring specialized tools or multiple cumbersome steps to complete the length adjustment, reducing efficiency and user experience; others are prone to loosening after adjustment, causing the elastic band to change length during use, affecting the stability and safety of exercise. Therefore, developing a length-adjustable elastic band that is convenient to adjust and has a secure connection is of significant practical importance. Utility Model Content

[0005] The purpose of this invention is to provide an elastic rope with adjustable length to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adjustable-length elastic rope, comprising an elastic rope body, both ends of which are fitted with limiting handles, two sets of clamping handles are inserted into the surface of the limiting handles, and a limiting cover is screwed onto one end of the limiting handle. The limiting cover pushes the clamping handles to clamp the elastic rope body, and traction ropes are bolted to both sides of the limiting handles. A sponge sleeve is fitted onto the traction rope.

[0007] Preferably, the limiting handle is a "T"-shaped round tube, the outer ring surface of the limiting handle is provided with a screw groove, the side wall of the screw groove is provided with an external thread, the limiting cover is a round tube structure with an "L" shaped cross section, the inner wall of the limiting cover is provided with an internal thread, and the internal thread and the external thread are connected in a mating manner.

[0008] Preferably, the inner wall of the limiting handle has two inner ring grooves, which are annular grooves. The surface of the inner ring grooves has multiple through holes, and the through holes and notches correspond one-to-one, with the notches inserted into the through holes.

[0009] Preferably, a rubber cover is fixed between the two parallel sidewalls of the inner annular groove, one end of the clamping handle is fixed to the outer annular surface of the rubber cover, and the other end of the clamping handle is provided with an inclined surface.

[0010] Preferably, the limiting handle has notches on both sides, and a bolt rod is fixed between the two parallel sidewalls of the notch, with the two ends of the traction rope respectively bolted to the two bolt rods.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention presents an adjustable-length elastic cord, which, through a unique structural design, enables quick and easy adjustment of the cord's length. Users simply need to screw on the limiting cover to easily release or engage the clamping handle, allowing the cord to move freely within the limiting handle. After adjusting to the desired length, the limiting cover can be screwed back on to lock it in place. The entire adjustment process requires no additional tools, is simple and easy to understand, greatly improving convenience and efficiency, and meeting users' needs for quickly adjusting the elastic cord's length in different scenarios.

[0012] During length adjustment, when the limiting cover is screwed back onto the limiting handle, it sequentially pushes the two sets of clamping handles, causing multiple clamping handles to grip the elastic rope from all sides. This multi-directional clamping method increases the friction between the clamping handles and the elastic rope, ensuring a firm and reliable connection between the elastic rope and the limiting handle. Simultaneously, a rubber pad is provided at one end of the screw groove. After deforming and rebounding between the limiting sleeve and the screw groove, the rubber pad further enhances the screw connection's firmness, effectively preventing changes in the elastic rope length due to loosening during use, thus ensuring the safety and stability of the exercise. Attached Figure Description Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Sectional view of the structure at point AA; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 4 This is a schematic diagram of the limiting handle structure of this utility model.

[0013] In the diagram: 1. Elastic rope body; 2. Limiting handle; 201. Screw groove; 202. Inner ring groove; 203. Through hole; 204. Notched groove; 205. Bolted rod; 206. Rubber pad; 4. Rubber cover; 5. Clamping handle; 6. Limiting cover; 7. Traction rope body; 8. Sponge sleeve. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the 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.

[0015] Please see Figures 1-4 This utility model provides a technical solution: an adjustable length elastic rope, including an elastic rope body 1, with limiting handles 2 sleeved at both ends of the elastic rope body 1, two sets of clamping handles 5 inserted into the surface of the limiting handles 2, and a limiting cover 6 screwed onto one end of the limiting handle 2. The limiting cover 6 pushes the clamping handles 5 to clamp the elastic rope body 1, and traction ropes 7 are bolted to both sides of the limiting handle 2. A sponge sleeve 8 is sleeved on the rope body of the traction rope 7.

[0016] When the length of the elastic rope 1 needs to be adjusted, first unscrew the limiting cover 6 from the end of the limiting handle 2. At this time, the clamping handle 5 no longer clamps the elastic rope 1, and pulls the elastic rope 1 to move in the limiting handle 2 until the length of the elastic rope 1 between the two limiting handles 2 meets the requirements. Then, screw the limiting cover 6 back onto the limiting handle 2 and lock it. During the process of the limiting cover 6 being pushed on the limiting handle 2, the limiting cover 6 pushes the two sets of clamping handles 5 in sequence. After the clamping handles 5 are pressed, they clamp the elastic rope 1, so that multiple clamping handles 5 clamp the elastic rope 1 from all sides, making the elastic rope 1 and the limiting handle 2 firmly connected. The elastic rope 1 can then be used by holding the sponge sleeve 8.

[0017] To enable the clamping of the elastic rope body 1 by the clamping handle 5 and the release of the clamping handle 5 from the elastic rope body 1, the following technical features are proposed: The limiting handle 2 is a T-shaped cylindrical tube. The outer ring surface of the limiting handle 2 has a threaded groove 201. The side wall of the threaded groove 201 has an external thread. The limiting cover 6 is a cylindrical tube with an L-shaped cross-section. The inner wall of the limiting cover 6 has an internal thread, and the internal thread and the external thread are connected. The inner wall of the limiting handle 2 has two inner ring grooves 202. The inner ring grooves 202 are annular grooves. The surface of the inner ring grooves 202 has multiple through holes 203. The through holes 203 and notches 204 correspond one-to-one, and the notches 204 are inserted into the through holes 203. A rubber cover 4 is fixed between the two parallel side walls of the inner ring grooves 202. One end of the clamping handle 5 is fixed to the outer ring surface of the rubber cover 4, and the other end of the clamping handle 5 has a bevel.

[0018] When adjusting the length of the elastic rope body 1, after the limiting cover 6 is screwed off from the limiting handle 2, the rubber cover 4 rebounds and pulls the clamping handle 5 to move into the inner ring of the limiting handle 2. At this time, the clamping handle 5 no longer clamps the elastic rope body 1. After the limiting cover 6 is screwed back to the limiting handle 2, the clamping handle 5 tightly clamps the rubber cover 4 onto the surface of the elastic rope body 1, increasing the friction between the clamping handle 5 and the elastic rope body 1. The clamping of the clamping handle 5 achieves a firm connection between the limiting handle 2 and the elastic rope body 1. In addition, a rubber pad 206 is fixed at one end of the screw groove 201. The rubber pad 206 is clamped between the limiting sleeve 6 and the screw groove 201 and deforms before rebounding, making the limiting sleeve 6 and the screw groove 201 firmly screwed together.

[0019] To enable stretching exercises using elastic rope 1, the following was proposed: The limiting handle 2 has notches 204 on both sides. A bolt rod 205 is fixed between the two parallel sidewalls of the notch 204. The two ends of the traction rope 7 are respectively bolted to the two bolt rods 205.

[0020] How to use an adjustable-length elastic rope: I. Preparation before use: Before using this adjustable-length elastic rope, check that all parts of the elastic rope are intact. Confirm that the elastic rope body 1 is free from breakage, wear, etc.; the limit handle 2 is free from cracks and deformation; the clamping handle 5 is firmly inserted and not loose; the threads of the limit cover 6 are intact and can be turned normally; the traction rope body 7 is undamaged, and the sponge sleeve 8 is intact and can be properly fitted onto the traction rope body 7.

[0021] II. Length Adjustment Method (a) Releasing the clamp: When adjusting the length of the elastic rope 1, hold the limiting handle 2 with your right hand and the limiting cover 6 with your left hand, and slowly twist the limiting cover 6 counterclockwise to remove it from the end of the limiting handle 2. During this process, as the squeezing force of the limiting cover 6 on the clamping handle 5 disappears, the rubber cover 4 will rebound, pulling the clamping handle 5 into the inner ring of the limiting handle 2. At this time, the clamping handle 5 no longer clamps the elastic rope 1. For example, in a regular fitness stretching scenario, if the initial length of the elastic rope is 1.5 meters, and the user is taller (e.g., over 1.85 meters) or performs a large-range stretching movement (e.g., a lunge stretch with a stride of 0.8-1 meters), a longer elastic rope is needed. In this case, the length can be adjusted.

[0022] (II) Moving the Rope: After releasing the clamp 5 from the elastic rope 1, hold both ends of the elastic rope 1 with both hands and slowly and evenly pull the elastic rope 1 along the limiting handle 2. The required length should be determined based on different training needs and physical conditions. For example, for simple upper limb strength training (such as biceps curls), a rope length of 1-1.2 meters is generally suitable; for full-body compound exercises (such as resistance band squat jumps), the length may need to be adjusted to 1.8-2 meters. During movement, ensure that the elastic rope 1 moves smoothly within the limiting handle 2 without any jamming.

[0023] (III) Re-clamping: After the length of the elastic rope body 1 between the two limiting handles 2 meets the requirements, the limiting cover 6 is screwed back onto the limiting handle 2 in a clockwise direction to lock it. During the advancement of the limiting cover 6, the limiting cover 6 pushes the two sets of clamping handles 5 in sequence. After the clamping handle 5 is under pressure, the inclined surface at its other end will tightly clamp the surface of the elastic rope body 1. At this time, multiple clamping handles 5 clamp the elastic rope body 1 from all sides, which greatly increases the friction between the clamping handles 5 and the elastic rope body 1, making the connection between the elastic rope body 1 and the limiting handle 2 firm. At the same time, the rubber pad 206 fixed at one end of the screw groove 201 will be clamped between the limiting sleeve 6 and the screw groove 201. After the rubber pad 206 deforms, it rebounds, further ensuring the screw connection between the limiting sleeve 6 and the screw groove 201 and preventing the limiting cover 6 from loosening during use. For example, after adjusting the length, pull the elastic rope 1 with force to check whether its connection with the limit handle 2 is secure. If the elastic rope 1 does not slip when the pulling force reaches 50-80 Newtons, it indicates that the connection is secure.

[0024] III. How to use stretching exercises (a) Holding the traction rope: After adjusting the length of the elastic rope, hold the sponge sleeves 8 on both sides of the traction rope body 7 with both hands. The sponge sleeves 8 have good softness and elasticity, which can effectively reduce friction between the hand and the rope, provide a comfortable grip, and avoid hand discomfort or abrasions caused by prolonged use. For example, when performing stretching exercises for 20-30 minutes, the sponge sleeves 8 can effectively reduce the pain caused by friction in the hands.

[0025] (II) Stretching Exercises: Perform appropriate stretching exercises according to different training goals and body parts. Upper Limb Stretching: For biceps stretching, stand with the resistance band 1 fixed at a low position (e.g., at the ankle). Hold the traction band 7 with both hands, straighten your arms, and slowly raise your arms upwards, feeling the stretch in your biceps. Hold each stretch for 15-30 seconds and repeat 3-5 sets. The resistance provided by the resistance band can be adjusted according to individual strength; generally, the initial resistance can be set to 10-20 Newtons, gradually increasing as training progresses. Lower Limb Stretching: For stretching the posterior leg muscles, fix the resistance band 1 at a high position (e.g., on a horizontal bar). Place both feet on the traction band 7 and slowly squat down, keeping your back straight, feeling the stretch in the posterior leg muscles. Hold each stretch for 20-30 seconds and repeat 3-4 sets. The resistance of the resistance band can be set to approximately 15-25 Newtons. Full-body stretching: For example, perform a resistance band lunge stretch. Wrap the resistance band (1) around your back, hold the traction band (7) with both hands, assume a lunge position, bend your front knee to 90 degrees, straighten your back leg, and lean your body forward, feeling the stretch in all your muscles. Hold each stretch for 20-30 seconds, repeat 3-4 sets. The resistance of the resistance band can be adjusted to 20-30 Newtons according to individual fitness levels.

[0026] During stretching exercises, maintain proper form and stability. Avoid sudden force or overstretching to prevent muscle strain or joint injury. Perform each movement slowly and with control, feeling the stretch in the target muscles. Adjust the resistance and stretching intensity of the resistance band according to your physical condition and athletic ability. If you experience pain or discomfort during stretching, stop immediately and check the resistance band or consult a professional.

[0027] After completing the stretching exercises, clean any debris from the elastic band body 1. If there is sweat or stains, gently wipe it with a damp cloth. Then, tidy up the elastic band by wrapping the elastic band body 1 around the limiting handle 2 to prevent the rope from tangling or knotting. Finally, store the elastic band in a dry, well-ventilated place, avoiding direct sunlight and humid environments to extend its lifespan.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable-length elastic rope, comprising an elastic rope body (1), characterized in that: Both ends of the elastic rope body (1) are fitted with limiting handles (2). Two sets of clamping handles (5) are inserted into the surface of the limiting handles (2). A limiting cover (6) is screwed onto one end of the limiting handle (2). The limiting cover (6) pushes the clamping handles (5) to clamp the elastic rope body (1). A traction rope body (7) is bolted to both sides of the limiting handle (2). A sponge sleeve (8) is fitted onto the rope body of the traction rope body (7).

2. The adjustable-length elastic rope according to claim 1, characterized in that: The limiting handle (2) is a "T"-shaped round tube. The outer ring surface of the limiting handle (2) is provided with a screw groove (201). The side wall of the screw groove (201) is provided with an external thread. The limiting cover (6) is a round tube structure with an "L"-shaped cross section. The inner wall of the limiting cover (6) is provided with an internal thread. The internal thread and the external thread are connected in a mating manner.

3. The adjustable-length elastic rope according to claim 1, characterized in that: The inner wall of the limiting handle (2) has two inner ring grooves (202). The inner ring grooves (202) are annular grooves. The surface of the inner ring grooves (202) has multiple through holes (203). The through holes (203) and the notches (204) correspond one-to-one, and the notches (204) are inserted into the through holes (203).

4. The adjustable-length elastic rope according to claim 3, characterized in that: A rubber cover (4) is fixed between the two parallel sidewalls of the inner ring groove (202), one end of the clamping handle (5) is fixed to the outer ring surface of the rubber cover (4), and the other end of the clamping handle (5) is provided with an inclined surface.

5. The adjustable-length elastic rope according to claim 1, characterized in that: The limiting handle (2) has notches (204) on both sides. A bolt rod (205) is fixed between the two parallel sidewalls of the notch (204). The two ends of the traction rope (7) are respectively bolted to the two bolt rods (205).

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