Rear leg soft opening degree improving assistor for dance training

Abstract

The invention belongs to the technical field of dance training instruments, and particularly relates to a dance training rear leg soft opening degree lifting assistor. When the dance training rear leg soft opening degree lifting assistor is used, a trainee stands in a bow step, the thigh root portions of rear legs of the trainee are fixed to the top end of a leg traction mechanism, and the knee portions are in lap joint with the top end of a knee supporting mechanism; the foot is located on the pedal, the heel abuts against the heel baffle, the energy supply mechanism supplies energy to the power mechanism, the control mechanism controls the power mechanism to operate, downward traction force is formed on the thigh root portion of a trainee, meanwhile, the knee supporting mechanism provides knee supporting force for the trainee, the heel baffle prevents the shank portion of the trainee from upwarping, and the legs of the trainee are stretched straight. The training process is controllable, the leg traction mechanism, the knee supporting mechanism and the foot supporting mechanism are arranged, the problem that knee joints of a trainee cannot be straightened or rotate inwards in the training process can be effectively solved, and therefore the training effect is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of dance training equipment, and in particular relates to an auxiliary device for improving the flexibility of the hind legs during dance training. Background Art

[0002] "Open, tense, and straight" are core requirements of dance training, playing a crucial role in the foundational training of ballet and classical Chinese dance. From basic splits to classic movements like the Arabesque and Attitude, all require flexible extension of the hind leg. This training involves the coordinated coordination of the thigh flexors and extensors, as well as the hip and knee joints, making hind leg flexible extension training a key topic in dance education.

[0003] Currently, back leg training primarily utilizes the gluteus maximus external pressure method and the lunge self-pressing method, but these methods have significant drawbacks. The external pressure method relies on the instructor's experience and technique, and improperly controlled pressure can easily cause muscle, fascia, and even bone damage. The self-pressing method, on the other hand, requires high core stability and muscle control, and those with weak foundations are prone to problems such as difficulty straightening the knees and internal rotation, which compromises training effectiveness and poses safety risks. Summary of the Invention

[0004] The purpose of the present invention is to provide a dance training hind leg flexibility improvement auxiliary device to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A leg stretch aid for dance training comprises: a mounting base, a leg traction mechanism, a knee support mechanism, and a foot support mechanism disposed above the mounting base, the leg traction mechanism, the knee support mechanism, and the foot support mechanism being disposed in sequence, the leg traction mechanism being transmission-connected to a power mechanism, and the power mechanism being electrically connected to a control mechanism and an energy supply mechanism;

[0007] The foot support mechanism includes a pedal for placing the trainee's foot, the pedal is hinged to the top surface of the mounting base through a third hinge seat, one end of the pedal is fixedly connected to a heel baffle, and the heel baffle is arranged corresponding to the trainee's heel.

[0008] Preferably, the installation base includes a base with a cavity defined therein, the control mechanism, the leg traction mechanism, the knee support mechanism and the third hinge seat are all located on the top surface of the base, and the power mechanism and the energy supply mechanism are both located in the cavity.

[0009] Preferably, the leg traction mechanism includes a plurality of second connecting members, which are arranged sequentially from top to bottom, with a first gap between two adjacent second connecting members, the second connecting member at the bottom end is connected to the top surface of the base, the second connecting member at the top end is connected to the first connecting member, a first gap is left between the second connecting member and the first connecting member, the top end of the first connecting member is fixedly connected to a top plate, and a strap is fixedly connected to the top plate;

[0010] The first connecting member is fixedly connected to the top end of the first spring, the bottom end of the first spring is fixedly connected to the top surface of the base, and the plurality of second connecting members are sleeved on the outside of the first spring;

[0011] The first connecting member is connected to one end of a traction rope, the traction rope is inserted into the first spring, and the other end of the traction rope is inserted into the cavity and connected to the power mechanism.

[0012] Preferably, a slider is fixedly connected to the bottom end of the second connecting member, and the slider extends out of the second connecting member. The slider of the second connecting member located at the bottom end is hinged on the top surface of the base, and two sliding grooves are opened on the inner wall of the second connecting member. The two sliding grooves are arranged opposite to each other, and the sliding grooves are arranged vertically. The slider of the second connecting member located above is slidably connected to the sliding groove of the second connecting member located below, and the bottom end of the first connecting member is fixedly connected to another first connecting member, and the first connecting member is vertically slidably connected to the sliding groove of the second connecting member. When the slider is at the bottom end of the sliding groove, a second gap is left between two adjacent second connecting members and between the first connecting member and the second connecting member.

[0013] Preferably, the knee support mechanism includes a first sleeve hinged to the top surface of the base through a second hinge seat, a first slide is slidably connected in the first sleeve, the top end of the first slide passes through the first sleeve and is fixedly connected to a knee guard, a second spring is passed through the first slide, the top end of the second spring is fixedly connected to the first slide, and the bottom end of the second spring is fixedly connected to the first sleeve.

[0014] Preferably, a second slide is hingedly connected to the side of the first sleeve close to the leg traction mechanism, the second slide is slidably connected in the second sleeve, the second sleeve is hinged to the top surface of the base through a first hinge seat, a third spring is passed through the second slide, one end of the third spring is fixed to the second slide, and the other end of the third spring is fixed to the second sleeve.

[0015] Preferably, the power mechanism includes a driving motor fixedly installed in the cavity, the output shaft of the driving motor is coaxially fixed with the input shaft of the reducer, the reducer is fixedly installed in the cavity, the output shaft of the reducer is coaxially fixed with a rotating shaft, the rotating shaft is rotatably connected in the cavity through two bearing seats, a winding shaft is coaxially fixed on the rotating shaft, the winding shaft is located between the two bearing seats, and one end of the traction rope is fixedly connected to the winding shaft.

[0016] Preferably, the control mechanism includes a riser fixedly mounted on the top surface of the base, the riser is vertically arranged, a protective shell is fixedly connected to the top of the riser, a touch screen and a controller are fixedly arranged in the protective shell, the touch screen is electrically connected to the controller, and the controller is electrically connected to the drive motor through a second cable, and the second cable is passed through the riser.

[0017] Preferably, the energy supply mechanism includes a battery fixedly installed in the cavity, the battery is electrically connected to the controller, the battery is electrically connected to a socket through a first cable, and the socket is fixedly installed on one side of the base.

[0018] Preferably, an arc-shaped plate is fixed in the first connecting member, the concave surface of the arc-shaped plate is set downward, and a plurality of connecting rods are fixed on the concave surface of the arc-shaped plate. The plurality of connecting rods are respectively close to the opposite sides of the arc-shaped plate and symmetrically arranged along the axis of the arc-shaped plate. A connecting ring is fixed between the bottom ends of the plurality of connecting rods, and the first spring and the top end of the traction rope are fixedly connected to the connecting ring.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] When the present invention is in use, the trainee stands in a lunge, the root of the trainee's hind leg is fixed to the top of the leg traction mechanism, the knee is overlapped on the top of the knee support mechanism, the foot is located on the pedal and the heel is in contact with the heel baffle, the energy supply mechanism supplies energy to the power mechanism, and the control mechanism controls the operation of the power mechanism to form a downward traction force on the root of the trainee's thigh, while the knee support mechanism provides support force to the trainee's knee, and the heel baffle prevents the trainee's calf from tilting up, so that the trainee's leg is straightened.

[0021] The training process of the present invention is controllable, and the arrangement of the leg traction mechanism, the knee support mechanism and the foot support mechanism can effectively avoid problems such as the trainee's knee joint being unable to straighten or internally rotate during the training process, thereby ensuring the training effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0023] Figure 1 It is an overall schematic diagram of the present invention;

[0024] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0025] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0026] Figure 4 is a schematic structural diagram of the second connecting member in the present invention;

[0027] Among them, 1. Base; 2. Cavity; 3. Drive motor; 4. Bearing seat; 5. Reel; 6. Rotating shaft; 7. Traction rope; 8. Guide wheel; 9. Pull rope displacement sensor; 10. Through hole; 11. Battery; 12. First cable; 13. Socket; 15. Riser; 16. Protective shell; 17. Touch screen; 18. Strap; 19. First hinge seat; 20. Second hinge seat; 21. Third hinge seat; 22. Pedal ; 23. Heel guard; 24. Top plate; 25. Flexible pad; 26. Flexible shield; 27. First connecting member; 28. Arc plate; 29. ​​Connecting rod; 30. Connecting ring; 31. First spring; 32. Second connecting member; 33. Slide groove; 34. Slider; 35. First sleeve; 36. Second spring; 37. First slide; 38. Knee guard; 39. Second sleeve; 40. Third spring; 41. Second slide. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figures 1 to 4The present invention discloses a leg flexibility improvement auxiliary device for dance training, comprising: an installation base, a leg traction mechanism, a knee support mechanism, and a foot support mechanism arranged above the installation base, the leg traction mechanism, the knee support mechanism, and the foot support mechanism being arranged in sequence, the leg traction mechanism being transmission-connected to a power mechanism, and the power mechanism being electrically connected to a control mechanism and an energy supply mechanism;

[0031] The foot support mechanism includes a pedal 22 for placing the trainee's foot. The pedal 22 is hinged to the top surface of the installation base through a third hinge seat 21. One end of the pedal 22 is fixed with a heel stopper 23, which is arranged corresponding to the trainee's heel.

[0032] When the present invention is in use, the trainee stands in a lunge, the root of the trainee's hind leg is fixed to the top of the leg traction mechanism, the knee is overlapped on the top of the knee support mechanism, the foot is located on the pedal 22 and the heel is in contact with the heel baffle 23, the energy supply mechanism supplies energy to the power mechanism, and the control mechanism controls the operation of the power mechanism to form a downward traction force on the root of the trainee's thigh, while the knee support mechanism provides support force to the trainee's knee, and the heel baffle prevents the trainee's calf from tilting up, so that the trainee's leg is straightened.

[0033] According to a further optimization scheme, the installation base includes a base 1, a cavity 2 is provided in the base 1, the control mechanism, the leg traction mechanism, the knee support mechanism and the third articulated seat 21 are all located on the top surface of the base 1, and the power mechanism and the energy supply mechanism are both located in the cavity 2.

[0034] A further optimized solution is provided, in which the leg traction mechanism includes a plurality of second connecting members 32, which are arranged sequentially from top to bottom, with a first gap between two adjacent second connecting members 32, the second connecting member 32 at the bottom end being connected to the top surface of the base 1, the second connecting member 32 at the top end being connected to the first connecting member 27, with a first gap between the second connecting member 32 and the first connecting member 27, the top end of the first connecting member 27 being fixedly connected to the top plate 24, and the top plate 24 being fixedly connected to the strap 18;

[0035] Strap 18 is a dance training strap featuring high elasticity, breathability, and a secure fit. Made of a spandex blend or medical-grade elastic fiber, it ensures even force during stretching without restricting joint movement. The design features adjustable Velcro or multi-stage buckles to accommodate varying limb sizes. Some straps incorporate silicone anti-slip strips or pressure-distributing meshes to prevent shifting or localized pressure during training. Its advantages include: precise muscle support for improved movement accuracy; distributed joint load, reducing the risk of strain; and lightweight, breathable material for extended wear comfort, making it suitable for a variety of training scenarios, including flexibility and strength control.

[0036] A flexible pad 25 is also attached to the top surface of the top plate 24. The flexible pad 25 is made of medical silicone to prevent the user from feeling uncomfortable due to hard contact with the top plate 24.

[0037] The first connecting member 27 is fixedly connected to the top end of the first spring 31, the bottom end of the first spring 31 is fixedly connected to the top surface of the base 1, and the plurality of second connecting members 32 are all sleeved on the outside of the first spring 31;

[0038] The preferred material of the first spring 31 is high carbon steel, stainless steel or alloy steel, which has high elastic modulus and anti-fatigue properties, ensuring that it can maintain stable elastic force after long-term repeated compression / stretching. The spring stiffness coefficient (k value) needs to be consistent with the strength requirements of the training movement. For example, soft opening training requires progressive resistance, while explosive strength training may require rapid rebound. The surface is treated with anti-rust or coating to extend its service life. Its advantages include: providing controllable elastic resistance, action buffering and protecting joints, simple structure and easy integration, and can be adjusted to meet different training intensity requirements through pre-load adjustment.

[0039] The first connecting member 27 is connected to one end of the traction rope 7 , the traction rope 7 is inserted into the first spring 31 , and the other end of the traction rope 7 is inserted into the cavity 2 and connected to the power mechanism.

[0040] The outer covers of the first connecting member 27 and the plurality of second connecting members 32 are provided with flexible shields 26 to improve the aesthetics while preventing people from getting injured.

[0041] Further optimized, a guide wheel 8 is rotatably connected in the cavity 2, a rope displacement sensor 9 for measuring the displacement of the traction rope 7 is fixedly provided on the top surface of the cavity 2, and a through hole 10 for the traction rope 7 to pass through is opened on the base 1;

[0042] The bottom end of the traction rope 7 passes through the through hole 10 and the rope displacement sensor 9 in sequence, then passes around the guide wheel 8 and is connected to the winding shaft 5.

[0043] The selection of the traction rope must take into account strength, wear resistance, flexibility and resistance to tensile deformation, and use braided ropes made of high-molecular polyethylene fiber (such as Dyneema), nylon or polyester. This type of rope has high tensile strength (can withstand hundreds of kilograms of tension), low ductility (to avoid relaxation after stretching that affects control accuracy), and the surface is smoothed to reduce friction loss with the reel. Some traction ropes will add anti-static coatings or flame retardant layers to adapt to different environmental requirements, and the built-in Kevlar reinforced core can further improve durability. Its advantages include: lightweight, corrosion resistance, not easy to age after long-term use, and can accurately cooperate with the rope displacement sensor 9 to ensure the real-time feedback reliability of the training equipment.

[0044] To further optimize the solution, a slider 34 is fixed to the bottom end of the second connecting member 32, and the slider 34 extends out of the second connecting member 32. The slider 34 of the second connecting member 32 at the bottom is hinged to the top surface of the base 1, and two sliding grooves 33 are opened on the inner wall of the second connecting member 32. The two sliding grooves 33 are arranged opposite to each other, and the sliding grooves 33 are arranged vertically. The slider 34 of the second connecting member 32 located above is slidably connected in the sliding groove 33 of the second connecting member 32 located below, and the bottom end of the first connecting member 27 is fixed with another first connecting member 27. The first connecting member 27 is vertically slidably connected in the sliding groove of the second connecting member 32. When the slider 34 is at the bottom end of the sliding groove 33, a second interval is left between the two adjacent second connecting members 32 and between the first connecting member 27 and the second connecting member 32.

[0045] As the traction rope 7 overcomes the elastic force of the first spring 31 and does work, the first connecting member 27 descends and the second connecting member 32 also descends until it descends to the limit. At this time, a second interval is left between the two adjacent second connecting members 32 and between the first connecting member 27 and the second connecting member 32. The two adjacent second connecting members 32 and between the first connecting member 27 and the second connecting member 32 can still move, thereby avoiding interference with the trainee's legs when the leg traction mechanism contracts to the limit, causing personal injury.

[0046] A further optimized solution is that the knee support mechanism includes a first sleeve 35 hinged to the top surface of the base 1 through a second hinge seat 20, a first slide 37 is slidably connected in the first sleeve 35, the top end of the first slide 37 passes through the first sleeve 35 and is fixedly connected to the knee guard 38, a second spring 36 is passed through the first slide 37, the top end of the second spring 36 is fixedly connected to the first slide 37, and the bottom end of the second spring 36 is fixedly connected to the first sleeve 35.

[0047] To further optimize the solution, a second slide 41 is hinged on one side of the first sleeve 35 close to the leg traction mechanism, and the second slide 41 is slidably connected to the second sleeve 39. The second sleeve 39 is hinged to the top surface of the base 1 through the first hinge seat 19. A third spring 40 is passed through the second slide 41, and one end of the third spring 40 is fixed to the second slide 41, and the other end of the third spring 40 is fixed to the second sleeve 39.

[0048] A further optimized solution is provided, in which the power mechanism includes a driving motor 3 fixedly installed in the cavity 2, the output shaft of the driving motor 3 is coaxially fixedly connected to the input shaft of the reducer, the reducer is fixedly installed in the cavity 2, the output shaft of the reducer is coaxially fixedly connected to the rotating shaft 6, the rotating shaft 6 is rotatably connected in the cavity 2 through two bearing seats 4, a winding shaft 5 is coaxially fixedly connected to the rotating shaft 6, the winding shaft 5 is located between the two bearing seats 4, and one end of the traction rope 7 is fixedly connected to the winding shaft 5.

[0049] Drive Motor Selection 3: 1. Brushed DC Motor Advantages: Simple Structure: Speed ​​is directly regulated by voltage, eliminating the need for a complex driver. Low Cost: The total cost of the motor and driver board is under 100 yuan. Suitable for low to medium loads: Suitable for non-continuous operation such as traction rope reeling. 2. Brushless DC Motor Advantages: High Efficiency: Brushless design achieves energy conversion efficiency >85%, resulting in longer battery life. High-Precision Control: Supports closed-loop control (via encoder feedback) for precise speed and position adjustment, meeting the requirements for millimeter-level traction rope displacement control. Long Life: No mechanical wear, with a lifespan of over 10,000 hours. Quiet Operation: Ideal for dance training environments. 3. Stepper Motor Advantages: Precise Position Control: Angle control is achieved through pulse count, enabling open-loop positioning without an encoder. Low Speed, High Torque: Suitable for applications requiring stable pulling force (such as slowly stretching a spring). Moderate Cost: The motor and driver cost is between brushed and brushless motors. 4. Servo Motor Advantages: Extreme Precision: Closed-loop control with a high-resolution encoder, achieving position error <0.01mm. Fast dynamic response: Instantaneous adjustment of torque / speed to meet the changing load requirements of dance training (such as spring rebound compensation). High integration: Built-in brake and reducer options simplify the mechanical structure.

[0050] To further optimize the solution, the control mechanism includes a riser 15 fixedly installed on the top surface of the base 1. The riser 15 is arranged vertically, and a protective shell 16 is fixedly connected to the top of the riser 15. A touch screen 17 and a controller are fixedly arranged in the protective shell 16. The touch screen 17 is electrically connected to the controller, and the controller is electrically connected to the drive motor 3 through a second cable. The second cable is passed through the riser 15.

[0051] As the core component of human-computer interaction, the touch screen must have high sensitivity, anti-interference and durability, adopt capacitive or industrial-grade resistive touch technology, and support multi-touch or glove operation to adapt to different usage scenarios. The screen must have high brightness and wide viewing angle characteristics to ensure that training parameters (such as displacement, force, and duration) are clearly displayed under strong light or oblique conditions. In terms of protection, the wear resistance is improved through tempered glass panels or anti-scratch coatings, and some models support waterproof and dustproof (IP65 level) to cope with sweat or dust in the training environment. Its advantages include: an intuitive graphical operation interface to simplify the setting process, real-time data visualization to improve training feedback efficiency, and seamless integration of the controller to achieve dynamic adjustment of parameters (such as motor speed, spring preload), enhancing the intelligence and interactive experience of the equipment.

[0052] The controller selection must meet the functional requirements of precise speed regulation, displacement feedback, human-computer interaction, etc. The following controllers can be selected:

[0053] 1. PLC, or Programmable Logic Controller. Advantages: High reliability: Industrial-grade design, strong anti-interference capabilities, suitable for long-term operation. Multiple interface support: Can connect to cable-operated displacement sensors (such as analog input or RS485 communication), touch screens (HMI), and directly control drive motors (via PWM or pulse output). Flexible programming: Supports ladder diagrams and structured text, facilitating functions such as speed regulation and closed-loop displacement control. 2. Motion Controller. Advantages: High-precision control: Built-in PID algorithm precisely adjusts motor speed and torque, avoiding jitter caused by spring rebound. Real-time feedback: Supports encoder or displacement sensor signal input, enabling millimeter-level displacement detection (such as real-time display of cable-operated sensor data). Integration: Some models include a built-in touch screen interface, simplifying human-computer interaction development. 3. Embedded Controller. Advantages: Low cost: Suitable for small, customized equipment. Flexible development: Control logic can be implemented through C / Python programming, combined with a touch screen (such as a serial port display). Lightweight: Low power consumption, suitable for portable training equipment. The specific control program for the controller is designed, written, or purchased by those skilled in the art based on their specific needs and is not limited here. According to a further optimization scheme, the energy supply mechanism includes a battery 11 fixedly installed in the cavity 2, the battery 11 is electrically connected to the controller, the battery 11 is electrically connected to a socket 13 through a first cable 12, and the socket 13 is fixedly installed on one side of the base 1.

[0054] The following battery options are available: 1. Lithium-ion battery power range: Low-power devices (controller + small motor): 12V 10-20Ah, continuous output power of approximately 120-240W. Medium-power devices (servo motor + sensor): 24V 20-30Ah, continuous output power of 500-720W. Advantages: High energy density: Compact size and light weight, suitable for portable devices. Long cycle life: Lithium iron phosphate batteries can be charged and discharged over 2000 times (lead-acid batteries can only be charged and discharged 300-500 times). Fast charging: Supports 1-2 hours of fast charging (matching adapter required). No memory effect: Charge and use immediately, no need to fully discharge. 2. Lead-acid battery power range: 12V 7-20Ah, continuous output power of 84-240W (requires 50% reserve to prevent over-discharge). Advantages: Low price: Cost is only 1 / 3 to 1 / 2 of that of lithium batteries. Overcharge / over-discharge resistance: Better tolerance than ordinary lithium batteries. Applicable scenarios: fixed equipment or projects with limited budget.

[0055] A further optimized solution is that an arc-shaped plate 28 is fixed in the first connecting member 27, and the concave surface of the arc-shaped plate 28 is set downward. A plurality of connecting rods 29 are fixed on the concave surface of the arc-shaped plate 28, and the plurality of connecting rods 29 are respectively close to the opposite sides of the arc-shaped plate 28 and symmetrically arranged along the axis of the arc-shaped plate 28. A connecting ring 30 is fixed between the bottom ends of the plurality of connecting rods 29, and the top end of the first spring 31 and the traction rope 7 are fixedly connected to the connecting ring 30.

[0056] Usage process:

[0057] The trainee stands on the base 1 in a lunge position, with the rear leg resting on the top plate 24 and the knee guard 38, wherein the top plate 24 is located at the root of the trainee's thigh, and the trainee's thigh is fixed to the top plate 24 by a strap (18), the knee is resting on the knee guard 38, the foot is stepped on the pedal 22, and the heel is in contact with the heel guard 23, completing the preparation work;

[0058] The controller controls the drive motor 3 to start, and the drive motor 3 drives the winding shaft 5 to rotate and reel in the traction rope 7, so that the first connecting member 27 overcomes the elastic force of the first spring 31 and moves downward. At the same time, the first connecting member 27 and the second connecting member 32, as well as the two adjacent second connecting members 32, can swing back and forth, and the posture can be adaptively adjusted as the training progresses;

[0059] The controller can control the stop, start and speed of the drive motor 3, and the rope displacement sensor 9 can detect the moving distance of the traction rope 7 and display it on the touch screen 17, so that the trainee can preset the training level and know the current training status.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0061] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A dance training hind leg flexibility improvement auxiliary device, characterized by: include: An installation base is provided above which a leg traction mechanism, a knee support mechanism and a foot support mechanism are provided, wherein the leg traction mechanism, the knee support mechanism and the foot support mechanism are arranged in sequence, the leg traction mechanism is transmission-connected to a power mechanism, and the power mechanism is electrically connected to a control mechanism and an energy supply mechanism; The foot support mechanism comprises a pedal (22) for placing the trainee's foot, the pedal (22) being hinged to the top surface of the mounting base via a third hinge seat (21), one end of the pedal (22) being fixedly connected to a heel baffle (23), the heel baffle (23) being arranged corresponding to the trainee's heel.

2. The dance training hind leg flexibility improvement auxiliary device according to claim 1, characterized in that: The installation base comprises a base (1), a cavity (2) is provided in the base (1), the control mechanism, the leg traction mechanism, the knee support mechanism and the third hinge seat (21) are all located on the top surface of the base (1), and the power mechanism and the energy supply mechanism are both located in the cavity (2).

3. The dance training hind leg flexibility improvement auxiliary device according to claim 2, characterized in that: The leg traction mechanism comprises a plurality of second connecting members (32), the plurality of second connecting members (32) are arranged in sequence from top to bottom, a first interval is left between two adjacent second connecting members (32), the second connecting member (32) at the bottom end is connected to the top surface of the base (1), the second connecting member (32) at the top end is connected to the first connecting member (27), a first interval is left between the second connecting member (32) and the first connecting member (27), the top end of the first connecting member (27) is fixedly connected to a top plate (24), and a strap (18) is fixedly connected to the top plate (24); The first connecting member (27) is fixedly connected to the top end of the first spring (31), the bottom end of the first spring (31) is fixedly connected to the top surface of the base (1), and the plurality of second connecting members (32) are all sleeved on the outside of the first spring (31); The first connecting member (27) is connected to one end of a traction rope (7), the traction rope (7) is inserted into the first spring (31), and the other end of the traction rope (7) is inserted into the cavity (2) and connected to the power mechanism.

4. The dance training hind leg flexibility improvement auxiliary device according to claim 3, characterized in that: The bottom end of the second connecting member (32) is fixedly connected with a slider (34), and the slider (34) extends out of the second connecting member (32). The slider (34) of the second connecting member (32) at the bottom end is hinged on the top surface of the base (1). Two sliding grooves (33) are opened on the inner wall of the second connecting member (32). The two sliding grooves (33) are arranged opposite to each other, and the sliding grooves (33) are arranged vertically. The slider (34) of the second connecting member (32) located above is slidably connected in the sliding groove (33) of the second connecting member (32) located below. The bottom end of the first connecting member (27) is fixedly connected with another first connecting member (27), and the first connecting member (27) is vertically slidably connected in the sliding groove of the second connecting member (32). When the slider (34) is located at the bottom end of the sliding groove (33), a second interval is left between two adjacent second connecting members (32) and between the first connecting member (27) and the second connecting member (32).

5. The dance training hind leg flexibility improvement auxiliary device according to claim 2, characterized in that: The knee support mechanism comprises a first sleeve (35) hinged to the top surface of the base (1) through a second hinge seat (20), a first slide (37) is slidably connected in the first sleeve (35), the top end of the first slide (37) passes through the first sleeve (35) and is fixedly connected to a knee guard (38), a second spring (36) is passed through the first slide (37), the top end of the second spring (36) is fixedly connected to the first slide (37), and the bottom end of the second spring (36) is fixedly connected to the first sleeve (35).

6. The dance training hind leg flexibility improvement auxiliary device according to claim 5, characterized in that: A second slide (41) is hingedly connected to one side of the first sleeve (35) close to the leg traction mechanism. The second slide (41) is slidably connected to the second sleeve (39). The second sleeve (39) is hinged to the top surface of the base (1) through a first hinge seat (19). A third spring (40) is inserted into the second slide (41). One end of the third spring (40) is fixedly connected to the second slide (41), and the other end of the third spring (40) is fixedly connected to the second sleeve (39).

7. The dance training hind leg flexibility improvement auxiliary device according to claim 3, characterized in that: The power mechanism comprises a driving motor (3) fixedly mounted in the cavity (2), the output shaft of the driving motor (3) being coaxially fixedly connected to the input shaft of a reducer, the reducer being fixedly mounted in the cavity (2), the output shaft of the reducer being coaxially fixedly connected to a rotating shaft (6), the rotating shaft (6) being rotatably connected in the cavity (2) via two bearing seats (4), a winding shaft (5) being coaxially fixedly connected to the rotating shaft (6), the winding shaft (5) being located between the two bearing seats (4), and one end of the traction rope (7) being fixedly connected to the winding shaft (5).

8. The dance training hind leg flexibility improvement auxiliary device according to claim 7, characterized in that: The control mechanism comprises a riser (15) fixedly mounted on the top surface of the base (1), the riser (15) being arranged vertically, a protective shell (16) being fixedly connected to the top end of the riser (15), a touch screen (17) and a controller being fixedly arranged in the protective shell (16), the touch screen (17) being electrically connected to the controller, and the controller being electrically connected to the drive motor (3) via a second cable, and the second cable being passed through the riser (15).

9. The dance training hind leg flexibility improvement auxiliary device according to claim 8, characterized in that: The energy supply mechanism comprises a battery (11) fixedly mounted in the cavity (2), the battery (11) being electrically connected to the controller, the battery (11) being electrically connected to a socket (13) via a first cable (12), and the socket (13) being fixedly mounted on one side of the base (1).

10. The dance training hind leg flexibility improvement auxiliary device according to claim 3, characterized in that: An arc-shaped plate (28) is fixedly connected inside the first connecting member (27), and the concave surface of the arc-shaped plate (28) is set downward. A plurality of connecting rods (29) are fixedly connected to the concave surface of the arc-shaped plate (28), and the plurality of connecting rods (29) are respectively close to the opposite sides of the arc-shaped plate (28) and symmetrically arranged along the axis of the arc-shaped plate (28). A connecting ring (30) is fixedly connected between the bottom ends of the plurality of connecting rods (29), and the top ends of the first spring (31) and the traction rope (7) are fixedly connected to the connecting ring (30).

Images