CN114797008A

CN114797008A - Dance teaching is with shank pliability trainer

Info

Publication number: CN114797008A
Application number: CN202210367383.0A
Authority: CN
Inventors: 雷冰琦; 李乐; 苏杰
Original assignee: Xuchang University
Current assignee: Xuchang University
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-07-29

Abstract

The invention belongs to the technical field of dance training auxiliary equipment, and particularly relates to a leg flexibility training device for dance teaching, which comprises a base, two leg supporting parts and two hip supporting parts, wherein the hip supporting parts are arranged on the upper surface of the base; the buttock supporting part comprises a supporting shaft fixedly connected with the base and a buttock supporting plate connected to the top end of the supporting shaft; the leg supporting part comprises a leg supporting fixing plate, the upper surface of the leg supporting fixing plate is hinged with a leg supporting turnover plate, the upper surface of the leg supporting turnover plate is provided with a leg fixing mechanism, one end of the leg supporting fixing plate is rotatably connected with the supporting shaft, and the two leg supporting fixing plates are connected through a synchronizing mechanism; the left side and the right side of the base are respectively connected with an overturning supporting mechanism, and the overturning supporting mechanisms are fixedly connected with the base; this shank pliability trainer for dance teaching structural design is reasonable, the function is perfect relatively, training effect is good.

Description

Dance teaching is with shank pliability trainer

Technical Field

The invention belongs to the technical field of dance training auxiliary equipment, and particularly relates to a leg flexibility training device for dance teaching.

Background

Dance is a performance art, uses the health to accomplish various graceful or highly difficult actions, and the pliability training belongs to the training program of dance teaching in-process most basic, and dance pliability mainly includes the pliability of shank and the pliability of waist, to the training of shank pliability, exercises often through training programs such as split, leg pressing, and the split generally divide into horizontal split and vertical split, and the leg pressing generally divide into preceding leg pressing, back leg pressing and survey the leg pressing. When a trainer trains leg splitting, the trainer generally sits on the ground, and the two legs are transversely and gradually unfolded, so that a beginner can finish the training under the assistance of training personnel, time and labor are wasted, the applied force is not easy to control, the legs are easy to be pulled to be injured, and the training effect is not good; leg pressing training is usually completed by means of a handle bar, and the use requirements of a plurality of leg flexibility training items cannot be met simultaneously; therefore, how to overcome the above technical problems and disadvantages is a problem to be solved.

Disclosure of Invention

The invention aims to provide a leg flexibility training device for dance teaching, which is reasonable in structural design, multiple in function and good in leg flexibility training effect, aiming at the defects of the prior art.

The purpose of the invention is realized as follows: a leg flexibility training device for dance teaching comprises a base, two leg supporting parts and two hip supporting parts, wherein the hip supporting parts are arranged on the upper surface of the base, and the two leg supporting parts are respectively connected with the hip supporting parts; the buttock supporting part comprises a supporting shaft fixedly connected with the base and a buttock supporting plate connected to the top end of the supporting shaft; the leg supporting part comprises a leg supporting fixing plate, the upper surface of the leg supporting fixing plate is hinged with a leg supporting turnover plate, the upper surface of the leg supporting turnover plate is provided with a leg fixing mechanism, one end of the leg supporting fixing plate is rotatably connected with the supporting shaft, and the two leg supporting fixing plates are connected through a synchronizing mechanism; the left side and the right side of the base are respectively connected with a turnover supporting mechanism, and the turnover supporting mechanisms are fixedly connected with the base.

Furthermore, the position department that is close to the expansion end on the shank supports the fixed plate is connected with the support guiding mechanism, can provide stable support for the expansion end of shank support fixed plate through supporting the guiding mechanism, guarantees the motion stability of shank supporting part, can effectively avoid the expansion end of shank support fixed plate and the frictional contact between the ground simultaneously.

Further, support guiding mechanism and include the annular supporting seat of semicircle, the supporting seat sets up with the back shaft coaxial line, through connecting plate fixed connection between supporting seat and the base, the tip and the upset supporting mechanism of supporting seat link to each other, sliding connection is carried out through spacing guiding mechanism between the upper surface of supporting seat and upset supporting mechanism respectively and the expansion end of shank support fixed plate, can provide stable support for the expansion end of shank support fixed plate through the supporting seat, guarantees the motion stability of shank supporting part, can effectively prevent the relative motion on the vertical direction between shank support fixed plate and the supporting seat through spacing guiding mechanism.

Further, upset supporting mechanism is including connecting the bottom plate at the supporting seat tip, the upper surface of bottom plate and the upper surface of supporting seat are located same horizontal plane, the inner and base fixed connection of bottom plate, the upper surface of bottom plate is provided with the mounting hole, be provided with elevating system in the mounting hole, the position department corresponding with the mounting hole on the shank supporting and fixing plate is provided with the lift through-hole, carry out sliding connection through spacing guiding mechanism between the expansion end of bottom plate and shank supporting and fixing plate, can provide ascending motive force to shank supporting roll-over plate through elevating system to the user carries out preceding, back or side press leg operation according to self needs.

Further, spacing guiding mechanism is including setting up the spacing guide way at supporting seat and bottom plate upper surface, the gliding spacing guide block that is provided with cross sectional shape and is identical with it that is provided with in the spacing guide way, spacing guide block fixed connection can effectively prevent the relative motion on the vertical direction between shank supporting fixed plate and the supporting seat through spacing guiding mechanism, guarantees the stability and the accuracy nature that shank supporting fixed plate expansion end removed.

Furthermore, elevating system adopts multistage electric telescopic handle, multistage electric telescopic handle's top is connected with the leading wheel, the spacing spout relative roll of lower surface along shank support returning face plate of leading wheel reduces the frictional force between elevating system and the shank support returning face plate.

Furthermore, a sliding limiting mechanism is arranged between the leg support fixing plate and the bottom plate and between the leg support fixing plate and the supporting seat, so that the leg support fixing plate can be locked at the position of the limit rotation angle according to requirements.

Further, slip stop gear is including setting up the spring hole on shank supporting fixed plate lower surface, the downthehole compression spring that is provided with of spring, compression spring's lower extreme is connected with spacing steel ball, the upper surface of supporting seat and bottom plate is provided with the cross-section for curved recess with the corresponding position department of spacing steel ball, the tip position punishment of the upper surface recess of bottom plate and supporting seat do not is connected with spacing draw-in groove, the degree of depth of spacing draw-in groove is greater than the degree of depth of recess, through when spacing steel ball corresponds with spacing draw-in groove, can push spacing steel ball into spacing draw-in groove through compression spring to the realization is to the locking of shank supporting fixed plate in this position department.

Further, the synchronizing mechanism comprises a worm which is connected with the base in a rotating mode, the left side and the right side of the worm are respectively connected with a worm wheel A and a worm wheel B in a meshed mode, the worm wheel A and the worm wheel B are respectively and fixedly connected to a sleeve A and a transmission shaft, the transmission shaft is further fixedly connected with a transmission gear A, the transmission gear A is connected with the transmission gear B through a reversing gear, the reversing gear and the transmission gear B are respectively fixed to a connecting shaft and a sleeve B, the sleeve A and the sleeve B are respectively connected with the supporting shaft in a rotating mode, the sleeve A and the sleeve B are respectively and fixedly connected with two leg supporting and fixing plates, the transmission shaft and the connecting shaft are respectively and rotatably connected with the base or a hip supporting plate, and synchronous reverse rotating movement of two leg supporting portions can be guaranteed through the synchronizing mechanism.

Furthermore, the synchronizing mechanism comprises a sleeve C and a sleeve D which are respectively in rotary connection with the supporting shaft, a driven bevel gear A and a driven bevel gear B are respectively fixedly connected to the sleeve C and the sleeve D, the driven bevel gear A and the driven bevel gear B are respectively in meshed connection with the driving bevel gear, the driving bevel gear is fixedly connected to the driving shaft, the driving shaft is in rotary connection with the base, the sleeve C and the sleeve D are respectively in fixed connection with the two leg supporting and fixing plates, and synchronous reverse rotary motion of the two leg supporting parts can be guaranteed through the synchronizing mechanism.

The invention has the beneficial effects that:

1. the leg part of the leg supporting part comprises a supporting fixed plate and a leg supporting turnover plate, wherein a leg fixing mechanism is arranged on the upper surface of the leg supporting turnover plate, one end of the leg supporting fixed plate is rotatably connected with a supporting shaft, turnover supporting mechanisms are arranged on two sides of a base, and after the leg supporting part is rotated to the turnover supporting mechanisms, the leg supporting turnover plate can be pushed to rotate upwards through the turnover supporting mechanisms, so that a trainer can press legs forwards and backwards as required, and the leg part has multiple functions, good integral training effect and convenient operation;

2. according to the invention, the two leg supporting fixing plates are connected through the synchronization mechanism, so that the two leg supporting parts can synchronously and reversely rotate around the supporting shaft, the coordination of two legs of a trainer in the splitting process can be conveniently trained, the problem that part of people can only smoothly split to one side due to habits, leg strength and the like is avoided, the trainer can split to the left, the right or even to two sides synchronously, and the training effect on the flexibility of the legs of a user is ensured;

3. according to the invention, the sliding limiting mechanism is arranged between the leg support fixing plate and the bottom plate and between the leg support fixing plate and the supporting seat, so that the leg support fixing plate can be positioned and locked at the position of the limit rotation angle according to the requirement, and the use safety of the training device is ensured.

Drawings

FIG. 1 is a schematic top view of a leg flexibility training device for dance teaching according to the present invention.

FIG. 2 is a schematic front view of the leg flexibility training device for dance teaching of the present invention.

FIG. 3 is a schematic structural view of a synchronizing mechanism in the leg flexibility training apparatus for dance teaching according to the present invention.

FIG. 4 is a second schematic structural diagram of a synchronizing mechanism of the leg flexibility training apparatus for dance teaching according to the present invention.

FIG. 5 is a schematic sectional view of a bottom plate of the leg flexibility training device for dance teaching at the position of a limiting guide mechanism.

FIG. 6 is an enlarged view of a part of the structure of a part A of the leg flexibility training apparatus for dance teaching according to the present invention.

In the figure: 1. a base 2, a buttock supporting plate 3, a leg supporting fixing plate 4, a leg supporting turnover plate 5, a leg fixing mechanism 6, a supporting seat 7, a connecting plate 8, a bottom plate 9, a lifting through hole 10, a lifting mechanism 11, a handle 12, a limiting guide groove 13, a groove 14, a limiting clamping groove 15, a limiting guide block 16, a mounting hole 17, a supporting shaft 18, a limiting sliding groove 19 and a guide wheel 20, the worm 21, a worm wheel A22, a worm wheel B23, a sleeve A24, a transmission shaft 25, a transmission gear A26, a reversing gear 27, a transmission gear B28, a connecting shaft 29, a sleeve B30, a sleeve C31, a sleeve D32, a driven bevel gear A33, a driven bevel gear B34, a driving bevel gear 35, a driving shaft 32, a spring hole 33, a compression spring 34 and a limiting steel ball.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length," "width," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

The invention provides a leg flexibility training device for dance teaching, which can drive two legs of a trainer to rotate around a hip supporting part respectively through two leg supporting parts so as to assist the trainer in splitting; the leg supporting part comprises a leg supporting fixing plate 3 and a leg supporting turnover plate 4, the leg supporting turnover plate 4 can upwards turn around a hinge point corresponding to the leg supporting fixing plate 3, and after the leg supporting part is rotated to the turnover supporting mechanism, the leg supporting turnover plate 4 can be pushed to upwards rotate through the turnover supporting mechanism, so that a trainer can conveniently carry out leg pressing operation in a front-back manner according to needs, and the leg supporting part is multifunctional and has a good integral training effect.

In one embodiment of the invention, as shown in fig. 1 and 2, the leg flexibility training device for dance teaching comprises a base 1, two leg supporting parts and a hip supporting part, wherein the hip supporting parts are arranged on the upper surface of the base, and the two leg supporting parts are respectively connected with the hip supporting parts; the buttock support part comprises a support shaft 17 fixedly connected with the base 1 and a buttock support plate 2 connected to the top end of the support shaft 17; the leg supporting part comprises leg supporting fixing plates 3, leg supporting turnover plates 4 are hinged to the upper surfaces of the leg supporting fixing plates 3, leg fixing mechanisms 5 are arranged on the upper surfaces of the leg supporting turnover plates 4, one ends of the leg supporting fixing plates 3 are rotatably connected with supporting shafts 17, and the two leg supporting fixing plates 3 are connected through a synchronizing mechanism; the left side and the right side of the base 1 are respectively connected with a turnover supporting mechanism, and the turnover supporting mechanisms are fixedly connected with the base 1.

When the invention is used, a trainer sits on the hip supporting plate 2, two legs are respectively placed on the leg supporting turnover plate 4 in the leg supporting part, the two leg supporting fixing plates 3 are connected through a synchronizing mechanism, the synchronizing mechanism is connected with a driving mechanism, the two leg supporting parts are driven by the driving mechanism to rotate towards two sides around the supporting shaft 17 so as to assist the trainee to finish the split training, the two leg supporting parts are connected by the synchronizing mechanism, can ensure that the two leg supporting parts synchronously and reversely rotate so as to facilitate the training of the coordination of two legs of the training personnel in the splitting process and avoid the problem that part of the training personnel can only smoothly split to one side due to habits, leg strength and other reasons, the training personnel can split left, right and even synchronously to two sides, thereby ensuring the training effect on the flexibility of the legs of the user; when two leg supporting parts rotate respectively to the upset supporting mechanism department of 1 both sides of base, training personnel can be according to self user demand, and the certain angle of slowly upwards overturning around the articulated shaft is driven by upset supporting mechanism to support returning face plate 4 in the leg supporting part to supplementary training personnel carry out the leg pressing operation.

In one embodiment of the present invention, as shown in fig. 1, a support guide mechanism is connected to a position on the leg support fixing plate 3 near the movable end, and the support guide mechanism can provide stable support for the movable end of the leg support fixing plate 3, so as to ensure the motion stability of the leg support part, and effectively avoid the friction contact between the movable end of the leg support fixing plate 3 and the ground.

In one embodiment of the present invention, as shown in fig. 1, the supporting and guiding mechanism includes a semi-circular supporting seat 6, the supporting seat 6 is coaxially disposed with the supporting shaft 17, and the supporting seat 6 can provide stable support for the movable end of the leg supporting portion, so as to ensure the motion stability of the leg supporting portion; the supporting seat 6 is fixedly connected with the base 1 through a connecting plate 7 so as to fix the relative positions of the supporting seat 6 and the base 1; the end part of the supporting seat 6 is connected with the overturning supporting mechanism, so that the leg supporting part can smoothly slide from the supporting seat 6 to the overturning supporting mechanism; the upper surfaces of the supporting seat 6 and the overturning supporting mechanism are respectively in sliding connection with the movable ends of the leg supporting fixed plates 3 through limiting guide mechanisms, so that the movable ends of the leg supporting parts are accurately limited, and the leg supporting parts are prevented from shaking up and down.

In one embodiment of the present invention, as shown in fig. 1 and 2, the turnover supporting mechanism includes a bottom plate 8 connected to an end of the supporting seat 6, an upper surface of the bottom plate 8 and an upper surface of the supporting seat 6 are located on the same horizontal plane, the bottom plate 8 and the movable end of the leg supporting fixing plate 3 are slidably connected through a limiting and guiding mechanism, so as to ensure that the leg supporting fixing plate 3 slides back and forth between the bottom plate 8 and the supporting seat 6; the inner and the base 1 fixed connection of bottom plate 8, the upper surface of bottom plate 8 is provided with

mounting hole

16, 16 are provided with elevating system 10 in the mounting hole, the position department corresponding with mounting hole 16 on the shank supporting fixation plate 3 is provided with lift through-hole 9, can support returning face plate 4 to the shank through elevating system 10 and provide ascending thrust, support fixed plate 3 rotatory to bottom plate 8 upper surface department when the shank, and lift through-hole 9 just in time when corresponding with mounting hole 16, elevating system 10 can promote shank supporting returning face plate 4 and upwards overturn around its articulated shaft through lift through-hole upward movement to the user carries out preceding, back or side press leg operation according to self needs.

In one embodiment of the present invention, as shown in fig. 1 and fig. 2, the limiting guide mechanism includes a limiting guide groove 12 disposed on the upper surfaces of the support base 6 and the bottom plate 8, a limiting guide block 15 having a cross-sectional shape matched with the limiting guide groove 12 is slidably disposed in the limiting guide groove 12, the limiting guide block 15 is fixedly connected to the lower surface of the leg support fixing plate 3, and the movement of the movable end of the leg support fixing plate 3 can be precisely limited by the relative sliding between the limiting guide block 15 and the limiting guide groove 12, so that the relative movement between the leg support fixing plate 3 and the support base 6 in the vertical direction is effectively prevented, and the stability and the accuracy of the movement of the movable end of the leg support fixing plate 3 are ensured.

In one embodiment of the present invention, as shown in fig. 2, the lifting mechanism employs a multi-stage electric telescopic rod, the top end of the multi-stage electric telescopic rod is connected with a guide wheel 19, and the guide wheel 16 rolls relatively along a limiting chute 18 on the lower surface of the leg supporting turnover plate 4, so that the friction between the lifting mechanism 10 and the leg supporting turnover plate 4 during the turnover process of the leg supporting turnover plate 4 can be effectively reduced.

In one embodiment of the present invention, as shown in fig. 1, a sliding limiting mechanism is disposed between the leg support fixing plate 3 and the bottom plate 8 and the supporting seat 6, so as to lock the leg support fixing plate at the extreme rotation angle position as required.

In one embodiment of the present invention, as shown in fig. 1, 5 and 6, the sliding limiting mechanism includes a spring hole 32 disposed on the lower surface of the leg support fixing plate 3, a compression spring 33 is disposed in the spring hole 32, a limiting steel ball 34 is connected to the lower end of the compression spring 33, a groove 13 having an arc-shaped cross section is disposed at a position corresponding to the limiting steel ball 34 on the upper surfaces of the support base 6 and the bottom plate 8, a limiting slot 14 is respectively connected to end positions of the grooves 13 on the upper surfaces of the bottom plate 8 and the support base 6, the depth of the limiting slot 14 is greater than that of the groove 13, when the leg support fixing plate 3 moves relative to the support base 6 and the bottom plate 8, the limiting steel ball 34 rolls along the grooves 13 on the upper surfaces of the bottom plate 8 and the support base 6 under the action of the compression spring 33 until the limiting steel ball 34 moves to the position of the limiting slot 14, the limiting steel ball 34 is pushed into the limiting clamping groove 14 under the action of the compression spring 33, so that the leg supporting and fixing plate is locked at the position, the leg supporting and fixing plate 13 is prevented from moving relative to the bottom plate 8 and the supporting shaft seat 6, and the use safety of the training device is ensured

In one embodiment of the present invention, as shown in fig. 3, the synchronizing mechanism includes a worm 20 rotatably connected to the base 1, the worm 20 is respectively engaged and connected to a worm wheel a21 and a worm wheel B22 at left and right sides thereof, the worm wheel a21 and the worm wheel B22 are respectively fixedly connected to a sleeve a23 and a transmission shaft 24, the transmission shaft 24 is further fixedly connected to a transmission gear a25, the transmission gear a25 is connected to a transmission gear B27 through a reversing gear 26, the reversing gear 26 and the transmission gear B27 are respectively fixed to a connection shaft 28 and a sleeve B29, the sleeve a23 and the sleeve B29 are respectively rotatably connected to the support shaft 17, the sleeve a23 and the sleeve B29 are respectively fixedly connected to the two leg support fixing plates 3, the transmission shaft 24 and the connection shaft 28 are respectively rotatably connected to the base 1 or the hip support plate 2, when in use, the end of the worm 20 is connected to the handle 11, the worm 20 is manually rotated through the handle 11, the worm wheel A21 and the worm wheel B22 on two sides of the worm 20 can be driven to rotate around opposite directions, and the worm wheel B22 is sequentially connected with the transmission gear A25, the reversing gear 26 and the transmission gear 27 in a meshing manner, so that the rotating directions of the sleeve B29 and the sleeve A23 are opposite; then, by reasonably designing the transmission ratio between the worm wheel A21 and the worm wheel B22 and the transmission ratio between the transmission gear A and the transmission gear B, the sleeve A23 and the sleeve B29 can be ensured to always keep the same-speed reverse rotation movement, and further the synchronous reverse rotation movement between the two leg supporting parts is realized.

In one embodiment of the present invention, as shown in fig. 4, the synchronizing mechanism includes a sleeve C30 and a sleeve D31 rotatably connected to the support shaft 17, respectively, a driven bevel gear A32 and a driven bevel gear B33 are fixedly connected to the sleeve C30 and the sleeve D31 respectively, the driven bevel gear A32 and the driven bevel gear B33 are respectively engaged with the drive bevel gear 34, the driving bevel gear 34 is fixedly connected to a driving shaft 35, the driving shaft 35 is rotatably connected with the base 1, the sleeve C30 and the sleeve D31 are respectively fixedly connected with the two leg supporting and fixing plates 3, when in use, the driving shaft 35 is connected with the handle 11, the driving shaft 35 and the driving bevel gear 34 can be driven to rotate by the handle 11, under the direct meshing connection of the drive bevel gear 34 and the two symmetrically arranged driven bevel gears, the sleeve C30 and the sleeve D31 respectively drive the two leg supporting parts to synchronously and reversely rotate around the supporting shaft 17.

In one embodiment of the present invention, the leg fixing mechanism 5 includes a baffle fixed on the upper surface of the leg supporting turnover plate near the left and right sides, and the baffle can limit the legs of the trainee and prevent the trainee from sliding off the leg supporting turnover plate.

The foregoing is considered as illustrative only of the preferred embodiments of the invention, and is presented merely for purposes of illustration and description of the principles of the invention and is not intended to limit the scope of the invention in any way. Any modifications, equivalents and improvements made within the spirit and principles of the invention and other embodiments of the invention without the creative effort of those skilled in the art are included in the protection scope of the invention based on the explanation here.

Claims

1. The utility model provides a dance teaching is with shank pliability trainer, includes base, shank supporting part and buttock supporting part, its characterized in that: the hip supporting parts are arranged on the upper surface of the base, two leg supporting parts are arranged, and the two leg supporting parts are respectively connected with the hip supporting parts; the buttock supporting part comprises a supporting shaft fixedly connected with the base and a buttock supporting plate connected to the top end of the supporting shaft; the leg supporting part comprises a leg supporting fixing plate, the upper surface of the leg supporting fixing plate is hinged with a leg supporting turnover plate, the upper surface of the leg supporting turnover plate is provided with a leg fixing mechanism, one end of the leg supporting fixing plate is rotatably connected with the supporting shaft, and the two leg supporting fixing plates are connected through a synchronizing mechanism; the left side and the right side of the base are respectively connected with a turnover supporting mechanism, and the turnover supporting mechanisms are fixedly connected with the base.

2. The leg flexibility training device for dance teaching of claim 1, wherein: and a supporting and guiding mechanism is connected to the position, close to the movable end, on the leg supporting and fixing plate.

3. The leg flexibility training device for dance teaching of claim 2, wherein: the supporting guide mechanism comprises a semicircular annular supporting seat, the supporting seat and the supporting shaft are arranged coaxially, the supporting seat and the base are fixedly connected through a connecting plate, the end portion of the supporting seat is connected with the overturning support mechanism, and the upper surfaces of the supporting seat and the overturning support mechanism are connected with the movable end of the leg supporting and fixing plate in a sliding mode through a limiting guide mechanism respectively.

4. The leg flexibility training device for dance teaching of claim 3, wherein: upset supporting mechanism is including connecting the bottom plate at the supporting seat tip, the upper surface of bottom plate and the upper surface of supporting seat are located same horizontal plane, the inner and the base fixed connection of bottom plate, the upper surface of bottom plate is provided with the mounting hole, be provided with elevating system in the mounting hole, the position department corresponding with the mounting hole on the shank supporting fixation board is provided with the lift through-hole, carry out sliding connection through spacing guiding mechanism between the expansion end of bottom plate and shank supporting fixation board.

5. The leg flexibility training device for dance teaching of claim 4, wherein: the limiting guide mechanism comprises limiting guide grooves formed in the upper surfaces of the supporting seat and the bottom plate, limiting guide blocks with matched cross-sectional shapes are arranged in the limiting guide grooves in a sliding mode, and the limiting guide blocks are fixedly connected to the lower surface of the leg supporting and fixing plate.

6. The leg flexibility training device for dance teaching of claim 4, wherein: the lifting mechanism adopts a multi-stage electric telescopic rod, the top end of the multi-stage electric telescopic rod is connected with a guide wheel, and the guide wheel rolls relatively along a limiting chute on the lower surface of the leg supporting turnover plate.

7. The leg flexibility training device for dance teaching of claim 4, wherein: and a sliding limiting mechanism is arranged between the leg supporting and fixing plate and the bottom plate and between the leg supporting and fixing plate and the supporting seat.

8. A leg flexibility training device for dance teaching according to claim 7, wherein: the sliding limiting mechanism comprises a spring hole arranged on the lower surface of the leg supporting and fixing plate, a compression spring is arranged in the spring hole, the lower end of the compression spring is connected with a limiting steel ball, the positions, corresponding to the limiting steel ball, of the upper surfaces of the supporting seat and the bottom plate are provided with grooves with arc-shaped cross sections, the end positions of the grooves on the upper surfaces of the bottom plate and the supporting seat are respectively connected with limiting clamping grooves, and the depth of each limiting clamping groove is larger than that of each groove.

9. The leg flexibility training device for dance teaching of claim 1, wherein: the synchronous mechanism comprises a worm which is connected with the base in a rotating mode, the left side and the right side of the worm are respectively connected with a worm wheel A and a worm wheel B in a meshed mode, the worm wheel A and the worm wheel B are respectively and fixedly connected to a sleeve A and a transmission shaft, the transmission shaft is further fixedly connected with a transmission gear A, the transmission gear A is connected with the transmission gear B through a reversing gear, the reversing gear and the transmission gear B are respectively fixed to a connecting shaft and a sleeve B, the sleeve A and the sleeve B are respectively connected with the supporting shaft in a rotating mode, the sleeve A and the sleeve B are respectively connected with two leg supporting and fixing plates in a fixed mode, and the transmission shaft and the connecting shaft are respectively connected with the base or a hip supporting plate in a rotating mode.

10. The leg flexibility training device for dance teaching of claim 1, wherein: the synchronous mechanism comprises a sleeve C and a sleeve D which are respectively and rotatably connected with the supporting shaft, a driven bevel gear A and a driven bevel gear B are respectively and fixedly connected to the sleeve C and the sleeve D, the driven bevel gear A and the driven bevel gear B are respectively meshed with the driving bevel gear, the driving bevel gear is fixedly connected to the driving shaft, the driving shaft is rotatably connected with the base, and the sleeve C and the sleeve D are respectively and fixedly connected with the two leg supporting and fixing plates.