Muscle stretching device for physical exercise and using method thereof

Abstract

The invention discloses a tendon stretching device for physical exercise, which comprises a supporting keel, a stretching device, a stretching device and a stretching device, wherein a pedal column is arranged on the side part of the supporting keel; the fixing frame is arranged at one end of the supporting keel, and an anti-falling column, a supporting leg column and a two-way grip are arranged on the upper portion of the fixing frame; the supporting sleeve is arranged on the upper side wall of the supporting keel, and a sliding column is slidably connected into the supporting sleeve; the seat plate is mounted at the upper end of the sliding column and used for bearing the hip and body parts of the user; the control box is installed at one end of the supporting keel, and a movable pulley block, a tension adjusting seat, an electromagnet block, a balancing weight, a reset spring, a current control circuit, a Bluetooth assembly and a power module are integrated in the control box; the position of the seat plate is changed by adjusting the height of the sliding column, and the movable pulley block is connected with the supporting sleeve through a steel cable and matched with a balancing weight in the tension adjusting seat to achieve control over tension. The accurate real-time adjustment of the tension of the tendon stretching device can be realized, so that a user is prevented from being injured due to overlarge tension in the exercising process.

Description

Technical Field

[0005] This application relates to the technical field of fitness equipment, and specifically relates to a stretching device for physical exercise. Background Art

[0006] A sports stretching device is a fitness equipment specifically used for stretching body muscles and fascia, aiming to help users improve flexibility, prevent sports injuries, relieve muscle tension, and improve body posture. Sports stretching devices are mainly used to stretch various parts of the body, especially the legs, back, shoulders, etc.

[0007] The Chinese patent application with the publication number CN108704269A discloses a multifunctional split stretching fitness device, which adopts the way of worm and worm gear transmission to realize the adjustment of the split angle, and can provide different degrees of resistance for users to enhance the stretching effect. However, such a stretching device faces a problem in the use process, that is, how to achieve precise real-time adjustment of the pulling force. Since the physical fitness and adaptability of different users vary, if the pulling force is set too large during exercise, it may cause muscle strains or other physical injuries. Therefore, it is necessary to avoid potential hazards to users caused by improper pulling force adjustment. Summary of the Invention

[0008] In view of this, the embodiments of the present disclosure provide a stretching device for physical exercise, which at least partially solves the problems existing in the prior art.

[0009] A stretching device for physical exercise includes:

[0010] A support keel, on the side of which there are pedal columns;

[0011] A fixing frame, arranged at one end of the support keel, on the upper part of which there are anti - detachment columns, leg support columns and a two - way grip;

[0012] A support sleeve, arranged on the upper side wall of the support keel, with a sliding column slidably connected inside;

[0013] A seat board, installed at the upper end of the sliding column, for bearing the user's buttocks and part of the body;

[0014] A control box, installed at one end of the support keel, internally integrated with a movable pulley group, a pulling force adjusting seat, an electromagnet block, a counterweight block, a return spring, a current control circuit, a Bluetooth component and a power module;

[0015] By adjusting the height of the sliding column, the position of the seat board is changed. The movable pulley group is connected to the support sleeve through a steel cable and cooperates with the counterweight block in the pulling force adjusting seat to achieve the control of the pulling force.

[0016] Preferably, a first support base is provided at one end of the support keel, a second support base is fixedly connected to the lower end of the fixing frame, and the included angle between the support keel and the ground is set to 15-30°.

[0017] Preferably, a support bottom plate is connected to the outer side wall of the support sleeve, a leg support is fixedly connected to the upper side wall of the support bottom plate, and the leg support is perpendicular to the support sleeve.

[0018] Preferably, the two-way grip is in a C-shaped structure and is installed on the fixing frame through a connecting column.

[0019] Preferably, a plurality of positioning grooves are provided inside the sliding column, a limiting column is slidably connected inside the support sleeve, and height adjustment is realized through the cooperation of the limiting column and the positioning grooves.

[0020] Preferably, an electromagnet block is installed at the bottom of the tension adjusting seat, the counterweight block is slidably connected inside the tension adjusting seat and is separated from the electromagnet block by a return spring.

[0021] Preferably, a control component, a Bluetooth component and a power module are provided inside the control box, and the control component can adjust the power of the electromagnet block according to the signal received by the Bluetooth component.

[0022] Preferably, the movable pulley block is connected to the left side wall of the support sleeve through a steel cable, the hoisting end is connected to the counterweight block, and tension transmission is realized through the counterweight block.

[0023] The present invention also discloses a usage method of a muscle stretcher for physical exercise, including the following steps:

[0024] S1. The user first places the muscle stretcher on a flat ground, ensures the overall stability of the device, and adjusts the height of the sliding column according to personal height and comfort, so as to adjust the distance between the seat plate and the leg support;

[0025] S2. The user sits on the seat plate, places the feet on the footrest posts respectively, the elastic pads wrapped on the outer sides of the footrest posts provide comfortable support, the user places the calves on the leg supports, and the elastic pads of the leg supports provide buffering and support;

[0026] S3. The user holds the two-way grip with both hands, selects the front end or the rear end of the two-way grip according to his own needs, and the user moves the buttocks and shoulders backward, so that the center of gravity moves to the left rear side;

[0027] S4. Another user connects to the Bluetooth component through a mobile device, sends a signal to the control component, the control component controls the power of the electromagnet block through the current control circuit, and the electromagnet block adsorbs the iron counterweight block after being powered on, so as to increase the tension on the user's back and shoulders and perform muscle stretching work;

[0028] S5. The user can also sit on the seat board, insert the ankle between the anti - detachment column and the leg - supporting column, hold the two - way grip with both hands, and choose the front end or the rear end of the two - way grip according to their own needs. The user moves the buttocks and shoulders backward, so that the center of gravity moves to the left rear side.

[0029] S6. Another user connects to the Bluetooth component through a mobile device and sends a signal to the control component. The control component controls the power of the electromagnet block through the current control circuit. After the electromagnet block is energized, it adsorbs the iron counterweight block, thereby increasing the pulling force on the back of the user's thigh to perform the stretching work.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] Through the combined design of the electromagnet, movable pulley block and counterweight block, and combined with the high - precision current control circuit, the present invention realizes the real - time and accurate adjustment of the pulling force. The user can send a signal through the mobile device to quickly adjust the power of the electromagnet, thereby changing the pulling force of the counterweight block. This design is especially suitable for beginners and users with weak physical fitness, can effectively avoid the risk of over - stretching, and at the same time helps users optimize the exercise effect.

[0032] The present invention supports multi - part stretching of the back, shoulders and the back of the thighs, meeting the diverse exercise needs of users. The C - shaped design of the two - way grip allows the user to choose different holding positions according to their own height and stretching needs, providing a more natural stretching posture. At the same time, the height - adjustment function of the sliding column ensures that the distance between the seat board and the leg support can be adjusted according to the user's height, adapting to the usage needs of different people. This multi - functional design makes the device not only suitable for athletes and fitness enthusiasts, but also suitable for office workers, the elderly and rehabilitation patients, helping them improve flexibility, relieve muscle tension and prevent sports injuries in daily life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In the drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed according to the present application and should not be regarded as limiting the scope of the present application.

[0034] Figure 1 is a schematic structural diagram of the present invention;

[0035] Figure 2 is a front schematic diagram of the present invention;

[0036] Figure 3 is a cross - sectional schematic diagram of the present invention;

[0037] Figure 4 is a schematic diagram of the interior of the control box of the present invention;

[0038] Figure 5 is a top view schematic diagram of the present invention;

[0039] Figure 6 is a left side schematic diagram of the present invention.

[0040] Reference numerals: 1, support keel; 101, footrest column; 102, first support seat; 2, fixing frame; 201, anti - detachment column; 202, second support seat; 203, leg support column; 204, connecting column; 205, two - way grip; 3, control box; 301, steel cable; 302, movable pulley block; 303, tension adjusting seat; 3031, electromagnet block; 3032, counterweight block; 3033, return spring; 3034, current control circuit; 304, control component; 305, Bluetooth component; 306, power supply module; 4, support sleeve; 401, support bottom plate; 402, leg support; 403, limit column; 5, seat plate; 501, sliding column; 502, buffer seat; 503, positioning groove. Detailed implementation manners

[0041] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0042] As Figures 1 to 6 shown, a kind of muscle stretching device for physical exercise of the present application includes multiple components, and their combination realizes the goal of multifunctional and high - precision adjustable muscle stretching training. The functions, structures and connection forms of each component will be specifically described below.

[0043] The support keel 1 is the main load - bearing component of the whole device and is fixedly installed at the core position of the whole muscle stretching device. The support keel 1 is made of high - strength metal materials, such as high - quality aluminum alloy profiles or carbon steel materials, which can ensure the overall structural stability. Holes are respectively reserved on its front side wall and rear side wall for forming fixed connections with other components, providing a reliable support for other components.

[0044] The fixing frame 2 is an extension of the right end of the supporting keel 1 and is responsible for connecting various functional components. The fixing frame 2 is fixed to the supporting keel 1 by welding or other secure means, and a number of openings and clamping parts are provided in the middle and top to facilitate the direct connection of auxiliary components such as the two-way handle 205 with the fixing frame 2, thereby ensuring that there is no shaking during operation.

[0045] The footrest columns 101 are fixed to the front and rear walls of the support keel 1. These columnar structures are mainly used to provide space and support for the user to place his feet. The user can train by pressing his feet down and adjusting his posture. For example, a non-slip column made of round steel can be selected, and the surface is covered with a soft rubber layer to increase friction and prevent the foot from slipping and causing injury.

[0046] The first support base 102 is fixed to the lower end of the support keel 1, and plays a key role in reinforcing and stabilizing the equipment. It can be designed as an inverted U-shaped or similar casting, and installed on a flat ground through fasteners to ensure that the whole will not overturn. At the same time, an anti-slip rubber pad can be embedded at the bottom to reduce damage to the floor and keep the equipment more firmly level.

[0047] The support sleeve 4 is located in a specific area of ​​the upper side wall of the support keel 1 and forms a dynamic relationship with the sliding column 501. Its structure has a precisely machined guide slideway inside, allowing the sliding column 501 to move vertically; in addition, there are necessary notches and non-return mechanisms to constrain the direction of movement and its range of limitation.

[0048] The sliding column 501 penetrates and is movably inserted into the support sleeve 4 mentioned above. It relies on its own outer contour and embedded track to achieve unimpeded operation while ensuring sufficient tightness to avoid looseness and disorder. The top of this component is firmly connected to the seat part (i.e., the seat plate 5) that carries the user, so that when the seat needs to be adjusted, the height change can be completed by pushing it. Specifically, the precise lifting effect can be achieved through ball screw transmission or hydraulic push rod technology.

[0049] The seat plate 5 is placed on the top of the sliding column 501 to bear the weight of the sitting or lying user and various forces applied subsequently. In order to meet the needs of people of different body shapes, it is necessary to select artificial materials with excellent comfort and durability to create the surface coating and built-in elastic shock-absorbing elements.

[0050] The control box 3 is placed inside the side position of the first support base 102, and various functional components are assembled inside: for example, the movable pulley block 302, which consists of multiple axles arranged to change the power transmission line, and works together with the traction cable. The tension adjustment seat 303 changes the magnitude of the attractive force by means of the electromagnet block 3031, thereby affecting the load value in the entire counterweight system. By configuring a variable resistance device to connect to the current control circuit 3034 to adjust the magnitude of the current output, the required pressure level can be further refined; in addition, the Bluetooth component 305 can be wirelessly connected to other external devices to transmit data, facilitating the monitoring and statistics of training information and other advantages are highlighted; at the same time, the power module 306 ensures that the system has sufficient power during continuous operation without worry about power outages.

[0051] The two-way grip 205 is connected to the top of the fixed frame 2 by means of the connecting column 204. Its shape is a humanized curved rod-shaped object that can be easily grasped by hand. Usually, the surface is covered with an antibacterial PU leather to ensure hygiene and facilitate grasping. The two ends slightly expand outwards to expand the palm contact surface, thereby reducing the pressure per unit area and enhancing the comfort experience, which is of great significance for improving the efficiency of stretching.

[0052] The anti-drop column 201 and the support leg column 203 are set at the peripheral edges in the front and back of the fixed frame 2. They are designed to limit the user's leg posture to prevent accidental injuries caused by losing control midway and increase the safety factor. For example, by setting a groove for the ankle to enter and buckle, the relevant exercise mode can be started.

[0053] Through the above structural features, the problem of how to accurately and real-time adjust the tension of the stretching device to avoid the user being injured due to excessive tension during exercise has been effectively solved. In this application, the working principle of the movable pulley block 302 is used to efficiently convert mechanical energy into a required pressure value with a very small change range but sensitive enough to capture the results of each fine adjustment, and assist the electronic control system to automatically respond to external input parameter adjustment signals to correct the overload situation in a timely manner. At the same time, during the whole training process, the counterweight system can be used to smoothly transition through each movement stage to avoid potential dangers that may be brought about by suddenly increasing the burden. In this way, it can not only ensure the scientific and standardized development of the stretching course but also take into account the individual differences in needs to protect personal health and safety from any adverse interference factors, fully reflecting the great social benefit value brought by the advanced technology level.

[0054] In one embodiment, the support keel 1 of a stretching device for physical exercise of the present application forms a certain angle range with the ground and is vertically connected to the fixing frame 2. As the main load-bearing component of the entire device, the support keel 1 needs to meet certain angle restrictions in terms of structure to ensure the safety of users during use. The angle between it and the ground is set to 15 - 30°, thereby providing a stable inclined support platform for users. This angle design helps to enhance the stability of force transmission during stretching and is convenient for adjusting the human body posture, making the stretching effect more significant. At the same time, the fixing frame 2 can be set to be perpendicular to the support keel 1, which not only provides a stable foundation for other auxiliary components but also further improves the overall structural rigidity.

[0055] In addition, the stretching device is reinforced through the lower end part of the fixing frame 2, ensuring the balance and durability of the device. The fixing frame 2 adds support points at this position and is tightly connected to the ground through connecting components to prevent deviation or vibration during the application of tension, effectively ensuring the safety and stability during user operation. This structural design is reasonably combined, enabling each functional component to cooperate efficiently.

[0056] In one embodiment, a support base plate 401 is provided on the outer side of the support sleeve 4 of a stretching device for physical exercise of the present application, and the support base plate 401 is fixedly installed at the outer wall position of the support sleeve 4. Specifically, the support base plate 401 extends vertically outward from the outer wall of the support sleeve 4, forming a stable connection structure. In addition, a leg support 402 is installed on the upper side of the support base plate 401, and the leg support 402 and the support sleeve 4 present a spatial geometric layout perpendicular to each other. This design can ensure a stable support point for the user's legs during the stretching process and maintain the overall stability of the device through reasonable geometric relationships.

[0057] To achieve the above structural features, the support base plate 401 can be firmly connected to the outside of the support sleeve 4 by welding or fasteners, and its plane should be completely fitted to the outer surface of the support sleeve 4 to avoid stress concentration. At the same time, when the leg support 402 is fixed above the support base plate 401, it is necessary to ensure that the connection surface between the two is flat and the perpendicularity error is within an acceptable range, thereby constructing a strong and non-deformable installation foundation. In this way, users can perform effective physical exercise operations under the fixed support provided by the leg support 402, and at the same time, the position and direction requirements between components are technically guaranteed.

[0058] In one embodiment, the technical solution of a muscle stretching device for physical exercise of the present application improves the comfort and safety of the user during use by further optimizing the contact performance of each key component. The outer sides of the footrest column 101, the anti-slip column 201 and the leg support column 203 are all designed to be wrapped with elastic pads. This structure can not only avoid the pressure of metal or other hard materials on the body, but also play a certain buffering and protective role during exercise. At the same time, the seat plate 5, as a core component supporting the user's buttocks and part of the upper body weight, is also filled with elastic pads on the upper side, so that the user can still feel the balance and softness of the support effect under different position adjustments. In addition, the buffer seat 502 fixedly connected to the bottom of the seat plate 5 not only enhances the stability of the entire structure, but also can reduce the vibration transmitted to the ground or the supporting foundation when subjected to impact force.

[0059] Specifically, the technical implementation of this embodiment can be based on the following methods: for example, the key parts such as the pedal column 101 use a hot-pressed elastic material gasket that fits tightly on the surface and is fixed by gluing or locking buckles; the seat plate 5 has a reserved filling cavity inside, and polymer foam or rubber foam material is injected to meet the requirements of elasticity and deformation recovery; the buffer seat 502 can be made of high-strength elastic plastic or compressible rubber, and fixed to the bottom of the seat plate 5 by bolts or buckles to ensure stable connection and reliability during long-term use. The reasonable assembly of the above parts together constitutes the structure of the tendon stretcher with improved human body contact characteristics in this application.

[0060] In one embodiment, the two-way handle 205 adopts a C-shaped structural design, and the connecting column 204 at the connection with the fixing frame 2 is made by an integrated molding technology. This structural feature can ensure that the two-way handle 205 has a high structural strength and is not easy to deform or break under stress. In addition, the C-shaped design provides a larger hand-gripping area, which can provide a more comfortable gripping experience for the user. As a preferred installation method, the connecting column 204 is fixedly connected to the upper end of the fixing frame 2, and the position setting of the two-way handle 205 is located within the optimal force application range of the user's stretching operation, which is convenient for holding with both hands.

[0061] Structurally, the overall shape of the two-way grip 205 incorporates ergonomic principles, enabling the hand to apply force within different angular ranges without being restricted. Specifically, the integrated design of the two-way grip 205 and the connecting column 204 can be achieved through precision injection molding or die-casting processes. Meanwhile, high-quality materials such as high-strength aluminum alloy or modified engineering plastics are usually used in material selection to meet the requirements of practical applications. For example, after precise calculation of the model using computer-aided design software, it can be processed by a numerical control machine tool or mass-produced through mold manufacturing, thereby ensuring the consistency of component dimensions and the fit during the assembly process. This method can not only guarantee the functional integrity of the components but also simplify the later maintenance work and reduce the probability of failures.

[0062] In one embodiment, this height adjustment mechanism is achieved through a special structure between the sliding column 501 and the support sleeve 4. Specifically, several positioning grooves 503 are arranged inside the sliding column 501, and these positioning grooves 503 are regularly arranged and spaced at a fixed distance. Inside the support sleeve 4, a limiting column 403 is configured. The limiting column 403 can slide along a pre-set guiding track inside the support sleeve 4 and has the function of radially extending and retracting. By radially extending the limiting column 403 and mating it with a specific positioning groove 503 inside the sliding column 501, the locking of the position of the sliding column 501 relative to the support sleeve 4 can be achieved.

[0063] Technically, this feature can be achieved in various ways. For example, a spring assembly and a manual or mechanical triggering device can be connected to the tail of the limiting column 403, enabling the limiting column 403 to selectively engage with a certain positioning groove 503 on the sliding column 501 according to the user's operation. In addition, an electronic control module can be introduced to assist in managing the operation of the limiting column 403 to further enhance the safety and convenience of height adjustment. The size of the limiting column 403 needs to be precisely matched with the positioning groove to ensure that there is no interference or looseness during the assembly process, thus guaranteeing the stability and reliability of the overall structure.

[0064] In one embodiment, an electromagnet component is provided at the bottom of the tension adjustment seat 303. The electromagnet component is installed in a specified area inside the tension adjustment seat 303 through threads or other fixing methods. Specifically, the electromagnet is arranged opposite to the counterweight 3032 inside the tension adjustment seat 303. The counterweight 3032 can slide vertically along the inner wall of the tension adjustment seat 303, and the two are separated by a return spring 3033 to form a specific mechanical gap. The electromagnet and the return spring 3033 work together. After the electromagnet generates magnetism, it can exert an attractive force on the counterweight 3032, while the return spring 3033 plays a role of balancing force.

[0065] The position design between the electromagnet and the counterweight 3032 needs to ensure high-precision relative movement between the two. In addition, a stable spatial layout structure is provided inside the tension adjustment seat 303 so that the electromagnet and the counterweight 3032 can interact under preset conditions, thereby adjusting the traction strength of the device. In this system, the movement range of the counterweight 3032 defines the upper limit of the maximum tensile force value.

[0066] For example, when the user needs to adjust the tensile force, the control system can pass a certain amount of current into the electromagnet. The current control circuit 3034 transmits the signal to the electromagnet and activates its magnetic field property. The magnetic field change directly acts on the counterweight 3032 made of metal, causing the counterweight 3032 to slide to a new height position by overcoming part of the elastic force of the return spring 3033, thereby affecting the overall tensile force transmitted to the movable pulley block 302 through the steel cable 301. This design ensures that the counterweight 3032 and the electromagnet can still maintain a precise interaction effect under dynamic conditions.

[0067] In one embodiment, through a complex internal structure design, the control box 3 integrates multiple functional components to achieve intelligent operation. Among them, the control component 304, as the central coordination unit of the entire system, is installed inside the control box 3. It, together with the Bluetooth component 305 and the power module 306, constitutes an intelligent control system. The Bluetooth component 305 is integrated inside the control box 3 and is wirelessly connected to external signal devices. The electromagnet block 3031 is connected to the current control circuit 3034 in the tension adjustment seat 303 and is affected by the output instructions of the control component 304. In this way, the device realizes precise management of the power adjustment of the electromagnet block 3031.

[0068] Specifically, the change in the power of the electromagnet block 3031 directly depends on the specific parameter settings sent by the control component 304 after analyzing the external input signals received from the Bluetooth component 305. For example, by writing a preset program, the values received by Bluetooth can correspond to the current magnitudes required for different-intensity electromagnetic fields. Combined with the stable power supply of the power module 306, finally, the control component 304 converts these signals into actual execution actions, thereby achieving a quick response to external signals and coordinating with precise control of the tensile force.

[0069] In one embodiment, the movable pulley block 302 is connected to the left side wall of the support sleeve 4 by a steel cable 301 to form a linkage structure. Specifically, the movable pulley block 302 is integrated with the control box 3 through its own design and uses a built-in tension adjustment mechanism to achieve the functions of force transmission and stable output. An indirect traction mechanism is formed between the movable pulley block 302 and the support sleeve 4 by means of the steel cable 301, while ensuring that the direction and magnitude of the tension can be accurately controlled. To ensure stability, the connection of the steel cable 301 is strengthened so that it can be used for a long time under high load without obvious wear or deformation.

[0070] For example, this feature is achieved in the following way: the movable pulley block 302 is fixed inside the control box 3, and one end of it is connected to the steel cable 301 passing through the outside of the control box 3; the steel cable 301 passes through a specific opening on the left wall of the support sleeve 4 and is connected to an internal fixed point, and at the same time the other end of the steel cable 301 is directly and firmly connected to the counterweight 3032. The mass of the counterweight 3032 can be set by design parameters, so that the force formed during the user's pulling of the seat plate 5 can be effectively transmitted through this combination of the steel cable 301 - movable pulley block 302, and a stable reaction force is provided by the counterweight 3032 to achieve the effect of pulling the tendons.

[0071] In one embodiment, the support keel 1 provides additional functional components through a specific structural design. Specifically, a guide chute is provided inside the support keel 1, and this component plays an important role in realizing the overall function of the tendon puller. The guide chute is mainly used to guide the cooperating sliding column 501 to move smoothly up and down. During the operation of the tendon puller, the position of the sliding column 501 needs to change with the user's adjustment action. At this time, the guide chute provides a constraint to ensure the consistency and accuracy of its running direction.

[0072] To ensure that the guide chute can function stably, its installation position needs to meet the precise correspondence with the path of the sliding column 501. For example, the guide chute can be arranged vertically inside the support keel 1 near the side wall and be firmly combined with the support keel 1 through fasteners or other fixing methods. When implemented technically, the guide chute can be made of metal or high-hardness composite materials to enhance wear resistance, and a lubricating coating can be added inside the chute to reduce friction. Specifically, the outer wall shape of the sliding column 501 should match the cross-sectional shape of the guide chute, such as both being rectangular or circular, so that the two can fit together to maintain a good guiding effect during movement.

[0073] In one embodiment, the fixing bracket 2 is connected to the supporting keel 1 by bolts and has a multi-angle rotation function. The fixing bracket 2 is installed at the right end of the supporting keel 1, and its rotation structure design enables it to meet the postural requirements of different users, enhancing the adaptability and usage range of the muscle stretcher. Specifically, the fixing bracket 2 is installed using bolts as connectors. While connecting, a bearing or similar rotating component is used to enable the fixing bracket 2 to rotate relative to the supporting keel 1. In this way, the fixing bracket 2 can freely adjust its angle within a preset range to fit the user's body posture.

[0074] For example, at the connection position between the fixing bracket 2 and the supporting keel 1, there is an embedded rotating shaft device, which allows the fixing bracket 2 to rotate within a certain range around the central axis in the horizontal plane or in multiple directions. One end of the rotating shaft is firmly connected to the fixing bracket 2, and the other end is inserted into the reserved connection hole of the supporting keel 1, and then locked by an external fastening bolt to prevent unexpected detachment. This connection form ensures both connection stability and the possibility of flexible rotation. In addition, a friction resistance adjustment unit may be added between components to control the smoothness of rotation or the tightness during positioning.

[0075] In one embodiment, the footrest post 101 is a telescopic structure to allow users to adjust its height according to the leg length. The footrest post 101 is installed between the front side wall and the rear side wall of the supporting keel 1 and realizes height adjustment through a specific internal design. The footrest post 101 is composed of two or more nested tube bodies. The outer tube body is fixed to the supporting keel 1, and the inner tube body can move relative to the outer tube body. In addition, after adjusting to the required height, it can be fixed by a matching locking knob. The locking knob is installed outside the footrest post 101 in an interspersed manner and can form a snap connection with the corresponding holes or grooves on the inner tube body when pressure is applied or rotated, thus ensuring the stability of the entire device.

[0076] For example, from a technical implementation perspective, the telescopic function of the footrest post 101 can be achieved by using a common nested sliding mechanism, where the outer tube body has a plurality of evenly distributed openings for the locking knob to insert and position. Specifically, when adjustment is required, the user can loosen the locking knob, move the footrest post 101 to an appropriate position and then tighten it again, thus completing the height adjustment operation. This process is simple and reliable, meeting the flexibility requirements in actual use.

[0077] In one embodiment, adjusting foot cups are installed at the bottom of the first support base 102. The adjusting foot cups can adjust the height by rotation, thereby ensuring the stability of the entire device under different ground conditions. Specifically, the adjusting foot cups are mainly installed at the bottom position of the first support base 102 and are fixedly connected to the first support base 102, playing a role in horizontally adjusting and stably supporting the overall device. As one of the key components, the first support base 102 can adapt to various uneven or slightly inclined ground conditions through the adjusting foot cups provided at its bottom. This design realizes the functional requirement of fine-tuning the height of the device through a mechanical structure form.

[0078] The adjusting foot cups generally consist of two components with internal and external thread structures. One is the base part fixedly connected to the first support base 102, and the other is a rotatable height adjustment cylinder. The base part is firmly combined with the first support base 102, while the height adjustment cylinder is connected by threads and can expand and contract axially during rotation to change the distance from the base to the ground. For example, during actual operation, by manually screwing or using a tool to rotate the adjustment cylinder, fine adjustment of the height can be achieved, ensuring that the bottom of the device is closely attached to the ground and remains in a balanced state. This structure is both simple and effective, and can fully meet the actual application requirements of the device.

[0079] In one embodiment, a limit sensor is provided inside the support sleeve 4 of a stretching device for physical exercise of the present application, which is used to monitor the displacement range of the sliding column 501 in real time and transmit the signal to the current control circuit 3034 in the control box 3. Specifically, the limit sensor is positioned and fixed by being installed on the inner side wall of the support sleeve 4, and can capture the position change information of the sliding column 501 when the user adjusts the height of the seat plate 5 or performs relevant stretching exercises. The output end of the limit sensor is connected to the current control circuit 3034 in a wired or wireless form to ensure the closed-loop operation of the monitoring system.

[0080] As the core component for carrying the sliding of the sliding column 501, the internal structure of the support sleeve 4 is optimized to accommodate the limit sensor and its related circuit modules. The limit sensor consists of a sensing unit and a signal transmitting unit. The sensing unit surrounds the sliding column 501 to ensure the accuracy of data collection. At the same time, the signal transmitting unit can quickly feedback the position signal to the core circuit system in the control box 3, thereby completing the connection of functions such as data processing, judgment, and output control.

[0081] For example, when implemented technically, a Hall element or a displacement encoder can be used as the core structure of the limit sensor, which is embedded in the support sleeve 4 and interacts with the sliding column 501. Through the coordinated work of the electromagnet block 3031 or the counterweight block 3032, the safety and stability of the system operation are maintained during the tension adjustment process, thereby further improving the accuracy of the user experience.

[0082] In one embodiment, a pressure sensor is provided at the top of the sliding column 501 of a stretching device for physical exercise according to the present application. The pressure sensor can collect the pressure data applied by the user's buttocks in real time and transmit the data to the Bluetooth component 305. The pressure sensor is installed at the top of the sliding column 501, corresponding to the position of the seat plate 5, so as to accurately sense the pressure change borne on the seat plate 5. This installation method enables the pressure sensor to be within the effective range of the user's body weight, ensuring the authenticity and reliability of the detection results. Since the top of the sliding column 501 directly bears the seat plate 5 and transmits the force to the pressure sensor, this structural design ensures the consistency of pressure transmission and is not affected by external interference.

[0083] Specifically, the pressure sensor is composed of a sensitive element, a signal conversion circuit, etc., and realizes wireless transmission by connecting with the Bluetooth component 305 in the control box 3. The pressure sensing technology is based on the strain principle or the capacitance principle for measurement. For example, in practical applications, strain gauges can be selected as the core material to construct a pressure sensing system, convert mechanical pressure into an electrical signal, and then dock with the Bluetooth component 305 through the interface circuit to complete the tasks of capturing and transmitting pressure data. This integrated design optimizes the signal processing process and meets the requirements of the overall device compactness.

[0084] In one embodiment, a multi-stage buffer air cushion is installed at the bottom of the seat plate 5. This design aims to improve the safety and comfort of the device by optimizing the user's physical experience under different force conditions. The multi-stage buffer air cushion is composed of multiple independent units, and the internal air pressure value of each unit can be adjusted, so that the seat plate 5 can provide progressive buffer support under various load conditions. The seat plate 5 is connected to the support sleeve 4 through the sliding column 501, and the buffer air cushion, as a component directly contacting the bottom surface of the seat plate 5, can absorb the instantaneous impact force when the position of the seat plate 5 changes or the user's sitting posture is converted, reducing physical discomfort.

[0085] For example, when implementing the above features technically, an air pressure regulating valve can be integrated inside each buffer air cushion unit to control the injection and release of air, and at the same time, a pressure sensor is used to monitor the internal pressure state of each unit in real time and feedback it to the current control circuit 3034 in the control box 3 for unified regulation. Specifically, the buffer air cushion is fixed to the bottom of the seat plate 5 by a flexible joint method, and its coverage area is ensured to be sufficient to disperse the concentrated force points from the user. In addition, in order to adapt to different user groups with different weights or force requirements, multiple predefined modes can be set to match the corresponding air cushion pressure values, so as to achieve the effect of multi-stage buffering.

[0086] In one embodiment, a movable pulley group 302 and a gear system are integrated inside the control box 3 to accurately control the distribution of tension. Specifically, the movable pulley group 302 includes two pulleys, which are installed inside the control box 3 in a specific manner to achieve force transmission and distribution through the steel cable 301. The gear linkage system is connected to the movable pulley group 302 and is responsible for ensuring the consistency and balance of the force distribution during the movement of the steel cable 301. This structure can effectively adjust the tensile load borne by the steel cable 301 and make the user's operation more stable and reliable.

[0087] The above features can be realized by the following technical solutions: for example, one end of the steel cable 301 is connected to the corresponding component on the support sleeve 4, and the other end changes the direction of its force through the movable pulley group 302 and connects it to the counterweight block 3032. In this process, the linkage function of the gears can accurately adjust the tension, so that it can reasonably distribute the load according to the position of the counterweight block 3032 and the action of the current control circuit 3034 at different stages. The composition and installation form of the entire component are closely designed around the overall mechanical principle of the equipment to ensure compact structure and efficient operation.

[0088] In one embodiment, the two-way grip 205 has a built-in torque sensor element, which is installed at the upper end of the fixing frame 2 and is firmly connected to the fixing frame 2 through the connecting column 204, so that the user can hold it safely and conveniently with both hands. The torque sensor element is composed of a sensor circuit and a strain gauge, which is embedded in the two-way grip 205 and electrically connected to the current control circuit 3034 in the control box 3. The specific structural connection form is: a cavity is provided inside the two-way grip 205, wherein the sensor is fixedly installed on the inner side wall of the cavity, and its surface is ensured to be flat to meet the requirements of ergonomic design.

[0089] In addition, when the grip force of the user changes, the torque sensor element can transmit a signal to the current control circuit 3034 in the tension adjustment seat 303, and then the circuit dynamically adjusts the position of the counterweight block 3032 to ensure that the device provides appropriate tension. For example, in actual applications, when a larger grip force signal is detected, the electromagnet block 3031 will be excited to produce a specific intensity of magnetism, driving the counterweight block 3032 to move along the slide rail, thereby changing the load value of the overall tension system.

[0090] Specifically, this dynamic regulation can be achieved through electromagnetic driving force combined with a mechanical sliding structure, while cooperating with the return spring 3033 to provide a constant reaction force to maintain the stability and response efficiency of the system.

[0091] In one embodiment, the anti - detachment column 201 is arranged at the front side wall position of the fixed frame 2, aiming to provide a stable fixing function for the user's ankle. An adjustable - tightness Velcro is assembled on the anti - detachment column 201. Through the design of this component, the connection between the user's foot and the anti - detachment column 201 during the stretching process is made more secure, while ensuring that discomfort will not be caused due to overly tight binding. Specifically, this structure allows users of different body types to flexibly adjust the tightness according to their own needs, so as to adapt to diverse usage scenarios.

[0092] For example, to achieve the above - mentioned function, a soft pad can be sleeved outside the anti - detachment column 201, and a Velcro strap made of a wide - width fabric material is connected thereto. One end of the Velcro is fixed to one side of the pad by sewing, and the other end can be freely wound and attached to the buckle surface on the opposite side to complete the locking. To ensure the overall durability and comfort, high - strength polyester fiber materials can be selected to manufacture the Velcro and the strap parts, and the angle and position of the strap can be optimized in combination with ergonomic principles to further enhance its stability and safety.

[0093] In one embodiment, the comfort of the user's leg contact is further optimized on the support structure. The leg - supporting column 203 is fully wrapped by a sheath made of a soft material, thus effectively avoiding the discomfort caused by the user's long - time contact with hard components during exercise. This design reduces the pressure stimulation on the skin through the soft material and improves the human - machine interaction experience.

[0094] Specifically, the soft sheath can select a high - elasticity material according to actual usage requirements, such as memory foam or TPU - type materials, while ensuring that it fits tightly with the main body of the leg - supporting column 203 and will not become loose. To further enhance the user experience, a number of ventilation holes are evenly distributed on the surface of the sheath for dissipating heat and moisture accumulation, ensuring that the user can also maintain good physical comfort during long - time training.

[0095] During the actual operation process, when this device is in use, the user first places both feet on the foot - pedal column 101, and then fixes the ankles between the anti - detachment column 201 and the leg - supporting column 203 to ensure stability. Then, the user can adjust the height of the sliding column 501 to make the seat board 5 in a suitable position to support the user's buttocks and body parts. By holding the two - way grip 205 and applying a pulling force, the steel cable 301 will be pulled, and at the same time, the moving pulley group 302 cooperates with the counterweight 3032, the return spring 3033 and the current - control circuit 3034 in the tension - adjusting seat 303 to act together, so as to achieve precise control of the stretching force. The Bluetooth component 305 in the control box 3 can record and transmit the user's exercise data, and the power module 306 provides stable power support for the entire system. During the whole process, all components work together to help the user carry out effective stretching training.

[0096] For beginners or users with relatively weak physical fitness. The user places the stretching device on a flat ground to ensure the stability of the device. Adjust the height of the sliding column 501 according to personal height so that the distance between the seat plate 5 and the leg support 402 is suitable for one's own leg length. The user sits on the seat plate 5, places both feet on the pedal posts 101, and leans the calves against the leg support 402. Hold the front end of the two-way grip 205 with both hands, slightly move the hips and shoulders backward, and connect the Bluetooth component 305 through the mobile device to send a signal to the control component 304. The control component 304 slowly increases the power of the electromagnet block 3031 through the current control circuit 3034, thereby gradually increasing the pulling force of the counterweight 3032 on the user. This way of slowly increasing the pulling force is especially suitable for beginners and can effectively avoid muscle strains caused by excessive pulling force. At the same time, the user can view the pulling force data on the mobile device in real time to ensure the safety and effectiveness of the exercise process.

[0097] For users who need to stretch the back of the thighs. The user sits on the seat plate 5, inserts the ankles between the anti-slip post 201 and the leg support post 203 to ensure that the feet will not slip off during the stretching process. Hold the rear end of the two-way grip 205 with both hands, move the hips and shoulders backward to form a stable stretching posture. Send a signal through the mobile device. After receiving the signal, the control component 304 precisely adjusts the power of the electromagnet block 3031 through the current control circuit 3034, thereby changing the pulling force of the counterweight 3032. This design is especially suitable for users who want to focus on stretching the muscles on the back of the thighs, such as running enthusiasts or yoga practitioners. The user can set the magnitude and duration of the pulling force on the mobile device according to their own needs to achieve a personalized exercise plan.

[0098] For the usage scenario suitable for rehabilitation training. For some users who need to perform rehabilitation training due to injuries or surgeries, the stretching device provides a gentle and effective stretching method. The user sits on the seat plate 5, gently places both feet on the pedal posts 101, and leans the calves against the leg support 402. Connect the Bluetooth component 305 through the mobile device. The user can set a relatively low initial pulling force and slowly increase the pulling force to avoid excessive pressure on the injured part. The control component 304 precisely controls the power of the electromagnet block 3031 through the current control circuit 3034 to ensure that the increase in the pulling force is smooth and controllable. At the same time, the user can view the real-time pulling force data and exercise time on the mobile device to adjust the exercise intensity according to the rehabilitation progress. This gentle and precise pulling force adjustment function makes the stretching device an ideal tool in rehabilitation training, helping users gradually restore muscle flexibility and joint range of motion.

[0099] The above are the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle described in the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A stretching device for physical exercise, characterized in that Comprising: A support keel (1) with a pedal post (101) provided on its side; A fixing frame (2) provided at one end of the support keel (1), with an anti - detachment post (201), a leg support post (203) and a two - way grip (205) provided on its upper part; A support sleeve (4) provided on the upper side wall of the support keel (1), with a sliding post (501) slidably connected inside; A seat board (5) installed at the upper end of the sliding post (501) for bearing the user's buttocks and body part; A control box (3) installed at one end of the support keel (1), internally integrated with a movable pulley group (302), a tension adjusting seat (303), an electromagnet block (3031), a counterweight block (3032), a return spring (3033), a current control circuit (3034), a Bluetooth component (305) and a power module (306); By adjusting the height of the sliding post (501), the position of the seat board (5) is changed. The movable pulley group (302) is connected to the support sleeve (4) through a steel cable (301) and cooperates with the counterweight block (3032) in the tension adjusting seat (303) to achieve the control of tension.

2. The muscle stretcher for physical exercise according to claim 1, characterized in that: A first support seat (102) is provided at one end of the support keel (1), the lower end of the fixing frame (2) is fixedly connected to a second support seat (202), and the included angle between the support keel (1) and the ground is set to 15 - 30°.

3. The stretching device for physical exercise according to claim 1, characterized in that: A support bottom plate (401) is connected to the outer side wall of the support sleeve (4), a leg support (402) is fixedly connected to the upper side wall of the support bottom plate (401), and the leg support (402) is perpendicular to the support sleeve (4).

4. The stretching device for physical exercise according to claim 1, characterized in that: The two - way grip (205) is in a C - shaped structure and is installed on the fixing frame (2) through a connecting column (204).

5. The muscle stretcher for physical exercise according to claim 3, wherein: A number of positioning grooves (503) are provided inside the sliding post (501), a limiting post (403) is slidably connected inside the support sleeve (4), and height adjustment is achieved through the cooperation of the limiting post (403) and the positioning grooves (503).

6. The stretching device for physical exercise according to claim 5, characterized in that: An electromagnet block (3031) is installed at the bottom of the tension adjusting seat (303), the counterweight block (3032) is slidably connected inside the tension adjusting seat (303) and is separated from the electromagnet block (3031) by a return spring (3033).

7. The stretching device for physical exercise according to claim 6, characterized in that: A control component (304), a Bluetooth component (305) and a power module (306) are provided inside the control box (3), and the control component (304) can adjust the power of the electromagnet block (3031) according to the signal received by the Bluetooth component (305).

8. The stretching device for physical exercise according to claim 7, characterized in that: The movable pulley group (302) is connected to the left side wall of the support sleeve (4) through a steel cable (301), the hoisting end is connected to the counterweight block (3032), and tension transmission is achieved through the counterweight block (3032).

9. A method of using a leg stretcher for physical exercise, applied to the leg stretcher for physical exercise according to claim 8, characterized in that, Including the following steps: S1. First, the user places the stretching device on a flat ground to ensure the overall stability of the device, and adjusts the height of the sliding post (501) according to personal height and comfort, so as to adjust the distance between the seat board (5) and the leg support (402); S2. The user sits on the seat board (5), places their feet on the pedal posts (101) respectively, puts their calves on the leg supports (402), and the elastic pads of the leg supports (402) provide buffering and support. S3. The user holds the two-way grip (205) with both hands, selects the front end or the rear end of the two-way grip (205) according to their own needs, and moves the hips and shoulders backward, so that the center of gravity moves to the left rear side. S4. Another user connects to the Bluetooth component (305) through a mobile device, sends a signal to the control component (304), the control component (304) controls the power of the electromagnet block (3031) through the current control circuit (3034), and after the electromagnet block (3031) is powered on, it adsorbs the iron counterweight (3032), thereby increasing the pulling force on the user's back and shoulders to perform the stretching work. S5. The user sits on the seat board (5), puts their ankles between the anti-slip post (201) and the leg support post (203), holds the two-way grip (205) with both hands, selects the front end or the rear end of the two-way grip (205) according to their own needs, and moves the hips and shoulders backward, so that the center of gravity moves to the left rear side. S6. Another user connects to the Bluetooth component (305) through a mobile device, sends a signal to the control component (304), the control component (304) controls the power of the electromagnet block (3031) through the current control circuit (3034), and after the electromagnet block (3031) is powered on, it adsorbs the iron counterweight (3032), thereby increasing the pulling force on the back of the user's thighs to perform the stretching work.

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