CN113082617B

CN113082617B - Flexible dynamic training stretcher for dance shoulders

Info

Publication number: CN113082617B
Application number: CN202110359782.8A
Authority: CN
Inventors: 胡益凡; 月东晓
Original assignee: Changshu Institute of Technology
Current assignee: Changshu Institute of Technology
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2022-04-26
Anticipated expiration: 2041-04-02
Also published as: CN113082617A

Abstract

The invention discloses a dance shoulder flexibility dynamic training stretcher which comprises a knee pad, an arc-shaped outer slide rail, an arc-shaped inner slide rail and a pair of holding sliding assemblies, wherein the arc-shaped outer slide rail and the arc-shaped inner slide rail are arranged at the front part of the knee pad, the arc-shaped outer slide rail and the arc-shaped inner slide rail are concentrically arranged, each holding sliding assembly comprises a radial slide bar, a holding plate, an outer pulley block, an inner pulley block and a spring, the holding plate is in sliding fit with the radial slide bar, the front end of the radial slide bar is connected with the outer pulley block, the rear end of the radial slide bar is connected with the inner pulley block, the outer pulley block is matched with the arc-shaped outer slide rail and slides along the arc-shaped outer slide rail, the inner pulley block is matched with the arc-shaped inner slide rail and slides along the arc-shaped inner slide rail, a handle is arranged on the surface of the holding plate, and the springs are arranged between the holding plate and at least one end of the front end and the rear end of the radial slide bar. The invention provides stretching guide and load for shoulder training of dancers, improves the training effect and ensures the safety.

Description

Flexible dynamic training stretcher for dance shoulders

Technical Field

The invention relates to a shoulder flexibility training device, in particular to a dance shoulder flexibility dynamic training stretcher.

Background

In a dance training system, shoulder flexibility is extremely important and widely applied, and most of dance in different countries at home and abroad and different types of nations have typical movement laws related to shoulders. It is complicated to train, and besides the direct action of the shoulder joint, the sternoclavicular joint and the elbow joint, the acromioclavicular joint, the sternoclavicular joint and the spine are involved. In the field of sports science, the motion of an upper arm around a shoulder joint sagittal axis, the motion of the upper arm around an intermediate shaft between the shoulder joint sagittal axis and the frontal (coronal) axis (horizontal flexion and horizontal extension), the series of motions of the upper arm around a shoulder joint vertical shaft, the intermediate shaft and the like are directly related to the shoulder joint flexibility, and the series of composite motions of 'flexion-retraction', 'flexion-extension', 'extension-retraction' and 'rotation in' and 'rotation out' in the motion of an upper limb all need the coordination of the shoulder joint flexibility.

In the conventional dance course system, the training of the soft aperture of shoulder mainly adopts "static stretching", with the help of dance room ground, wall, barre, exerts pressure through external force and accomplishes, and its drawback is obvious: 1. sports injury. The external force is used for applying pressure as a main training means, the applied pressure is large, the action amplitude exceeds the normal movement range, and the experience of a person applying pressure and the bone and muscle characteristics of different persons cause large damage risks. 2. The efficiency is low. The traditional static stretching is due to its passive nature, so even if there is a large stretching amplitude, the practical application of the stretched person is difficult to achieve, and the training amplitude cannot be controlled independently and quantified. 3. Stretching is limited. Shoulder flexibility training involves different muscles, bones and ligaments at multiple parts, such as biceps brachii, triceps brachii, deltoid, great circular muscle, rhomboid muscle, latissimus dorsi, pectoralis major muscle, and the like, passive training can be completed only on muscles in a fixed range by means of a rod, and the motion track of the shoulder needs omnibearing and multi-angle training.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a dance shoulder flexibility dynamic training stretcher, which provides stretching guide and load for shoulder training of dancers, improves the training effect and ensures the safety.

The technical scheme of the invention is as follows: a dance shoulder flexibility dynamic training stretcher, which comprises a knee pad, an arc-shaped outer slide rail, an arc-shaped inner slide rail and a pair of holding slide components, the arc-shaped outer slide rail and the arc-shaped inner slide rail are arranged at the front part of the knee pad and are concentrically arranged, the holding sliding component comprises a radial sliding rod, a holding plate, an outer pulley block, an inner pulley block and a spring, the holding plate is in sliding fit with the radial sliding rod, the front end of the radial sliding rod is connected with the outer pulley block, the rear end of the radial slide bar is connected with the inner pulley block, the outer pulley block is matched with the arc-shaped outer slide rail to slide along the arc-shaped outer slide rail, the inner pulley group and the arc-shaped inner slide rail are matched to slide along the arc-shaped inner slide rail, a handle is arranged on the surface of the holding plate, the spring is arranged between the holding plate and at least one of the front end and the rear end of the radial sliding rod.

Furthermore, the springs are arranged between the holding plate and the front end and the rear end of the radial sliding rod.

Further, the spring is sleeved on the radial sliding rod.

Further, in order to enable the outer pulley block and the inner pulley block to stably slide on the outer arc-shaped slide rail and the inner arc-shaped slide rail and enable the radial slide bar to always keep radial directions of the outer arc-shaped slide rail and the inner arc-shaped slide rail, the outer arc-shaped slide rail and the inner arc-shaped slide rail are both slide grooves with C-shaped sections, the outer arc-shaped slide rail and the C-shaped opening of the inner arc-shaped slide rail are oppositely arranged, the outer pulley block and the inner pulley block are both pulley block structures, each pulley block structure comprises a first slider, a second slider and a connecting rod, the connecting rods are vertically arranged, the top ends of the connecting rods are connected with the first sliders, the bottom ends of the connecting rods are connected with the second sliders, pulleys are arranged at four corners of the first sliders and four corners of the second sliders, and the front ends and the rear ends of the radial slide bars are respectively connected with the connecting rods.

Furthermore, in order to adapt to the pressing heights of different dancers during shoulder training, the connecting rod is a screw rod, the front end and the rear end of the radial sliding rod are respectively fixed with a nut assembly, and the nut assembly and the screw rod form a screw rod nut kinematic pair.

Further, in order to keep the holding plate parallel and stable, the surface of the radial sliding rod is provided with a guide bar extending axially, the holding plate is provided with a hole matched with the cross section of the radial sliding rod, and the radial sliding rod penetrates through the holding plate through the hole.

Further, the central angle corresponding to the arc-shaped outer slide rail is 80-90 degrees.

Further, the radius of the outer slide rail of arc is 3.8 ~ 4m, the difference in radius of the outer slide rail of arc with slide rail in the arc is 20 ~ 25 cm.

Compared with the prior art, the invention has the advantages that:

the holding plate with resistance generated by a spring is pushed on the radial slide bar, and the self-help, safe and efficient training is performed to the utmost extent by adopting a PNF dynamic training method which is advocated in the field of sports science by matching with human breath; the radial slide bar is used for guiding the forward extension motion of the shoulder, and the arc-shaped outer slide rail and the arc-shaped inner slide rail are used for guiding the extension motion of the shoulder to two sides, so that the dancer can be helped to completely extend the shoulder extension training.

Drawings

FIG. 1 is a schematic top view of a dance shoulder flexibility dynamic training stretcher according to an embodiment.

Fig. 2 is a schematic view of the combination of the holding plate and the radial sliding rod.

Fig. 3 is a schematic view of the arc-shaped outer slide rail and the arc-shaped inner slide rail used for matching the holding slide assembly.

Fig. 4 is a schematic view of a pulley block structure.

Detailed Description

The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention thereto.

Referring to fig. 1 to 4, a dance shoulder flexibility dynamic training stretcher according to an embodiment of the present invention includes a knee bolster 1, an arc-shaped outer slide rail 2, an arc-shaped inner slide rail 3, and a pair of grip slide assemblies, wherein the knee bolster 1 is in a sector area, and the arc-shaped outer slide rail 2 and the arc-shaped inner slide rail 3 are fixed at a front portion of the knee bolster 1. The main material of the rear part of the knee pad 1 is soft latex, and two recesses 1a are arranged at proper positions of the middle part, so that the dancer can kneel the knees at the recesses 1a during training. The arc-shaped outer slide rail 2 and the arc-shaped inner slide rail 3 are concentrically arranged and fixed at the front part of the knee pad 1, the radius of the arc-shaped outer slide rail 2 is 3.8-4 m, and the radius difference between the arc-shaped outer slide rail 2 and the arc-shaped inner slide rail 3 is 20-25 cm. In this embodiment, the radius of the arc-shaped outer slide rail 2 is 4m, the radius of the arc-shaped inner slide rail 3 is 3.75m, and the radius difference between the arc-shaped outer slide rail 2 and the arc-shaped inner slide rail 3 is 25cm, so that the radial push-pull stroke of the grasping slide assembly is about 20 cm. The arc-shaped outer slide rail 2 and the arc-shaped inner slide rail 3 are corresponding to each other to form a central angle with the same angle, and the central angle is generally 80-90 degrees in order to ensure that the shoulder has enough angle for the unfolding training to the two sides, and the central angle is 83 degrees in the embodiment.

The holding sliding assembly is provided with a pair of holding sliding assemblies which are respectively used for holding and moving by left and right hands. The holding sliding component comprises a radial sliding rod 4, a holding plate 5, an outer pulley block 6, an inner pulley block 7 and a spring 8. As shown in fig. 2, in order to keep the holding plate 5 parallel and stable and facilitate the force application of the dancer's hand and shoulder, the surface of the radial sliding rod 4 is provided with a raised guide bar 4a extending axially, the holding plate 5 is provided with a hole 5a matching the cross section of the radial sliding rod 4, the radial sliding rod 4 is inserted into the holding plate 5 through the hole 5a, and the two are in sliding fit. The grip plate 5 can be kept moving smoothly along the radial sliding rod without any overturning to the left or right. A transverse handle 9 is arranged on the surface of the holding plate 5 to facilitate the grasping of the dancer. Springs 8 are arranged between the holding plate 5 and the front end and the rear end of the radial sliding rod 4, the radial sliding rod 4 is sleeved with the springs 8, one end of each spring 8 is connected with the radial sliding rod 4, and the other end of each spring 8 is connected with the holding plate 5. When the dancer pushes the holding plate 5 forward, the spring 8 positioned at the front side of the holding plate 5 is compressed, the spring 8 positioned at the rear side of the holding plate 5 is stretched, and the elastic force generated by the spring 8 helps the dancer to complete the forward shoulder exerting training.

Referring to fig. 3 and 4, the front end of the radial sliding rod 4 is connected to the outer pulley block 6, and the rear end of the radial sliding rod 4 is connected to the inner pulley block 7. Wherein the outer pulley block 6 is matched with the arc-shaped outer slide rail 2 to slide along the arc-shaped outer slide rail, and the inner pulley block 7 is matched with the arc-shaped inner slide rail 3 to slide along the arc-shaped inner slide rail. In this embodiment, what slide rail 3 all adopted in slide rail 2 and the arc outside the arc is the spout that the cross-section is the C type, and slide rail 3's C type opening sets up relatively in slide rail 2 and the arc outside the arc, and slide rail 2 is to the inside side opening outside the arc promptly, slide rail 3 is to the outside side opening in the arc. Outer assembly pulley 6 and interior pulley block 7 are the assembly pulley structure, and the assembly pulley structure includes first slider 9, second slider 10 and connecting rod 11, and connecting rod 11 is vertical setting for the lead screw, and the top and the first slider 9 of connecting rod 11 are connected, and the bottom and the second slider 10 of connecting rod 11 are connected, and the four corners of first slider 9 and the four corners of second slider 10 are equipped with pulley 12. The first slider 9 and its pulley 12 are constrained to move in the upper groove of the C-channel, while the second slider 10 and its pulley 12 are constrained to move in the lower groove of the C-channel, with the pulley 12 and the C-channel being kept with a high friction. The front end and the rear end of the radial slide bar 4 are respectively fixed with a nut component 13, the nut components 13 and the connecting rod 11 form a screw-nut kinematic pair, when the connecting rod 11 rotates, the nut components 13 move up and down to adjust the height of the radial slide bar 4, and then the height of the holding plate 5 is adjusted. The connecting rod 11 can be connected with a rotating shaft of a remote-controlled motor 14, the motor 14 drives the connecting rod 11 to rotate to adjust the height of the holding plate 5, and a control button 15 can be added on the holding plate 5 to control the motor 14 to rotate forwards and backwards.

When the training stretcher is used by a dancer, knees are kneeled at the concave 1a of the knee pad 1, the handles 9 of the two holding plates 5 are held by the two hands in a forward extending mode, the upper body applies force to press down, the holding plates 5 are pushed to move forwards along the radial sliding rods 4 by overcoming the elastic force of the springs 8, the forward extending training is completed, the two arms are separated, the holding plates 5 and the radial sliding rods 4 are pushed to move towards the two sides along the arc-shaped outer sliding rails 2 and the arc-shaped inner sliding rails 3 respectively, and the stretching training of shoulder unfolding is completed. The two holding plates 5 and the radial sliding rod 4 can also be moved to one side along the arc-shaped outer sliding rail 2 and the arc-shaped inner sliding rail 3, for example, the two holding plates are moved to the left side at the same time to stretch the right shoulder in the opposite direction, and then moved to the right side at the same time to stretch the left shoulder in the opposite direction. After the stretching is in place, the height of the holding plate 5 can be adjusted through the control button 15 to perform static stretching training.

Claims

1. A flexible dynamic training stretcher for dance shoulders is characterized by comprising a knee pad, an arc-shaped outer slide rail, an arc-shaped inner slide rail and a pair of holding slide assemblies, wherein the arc-shaped outer slide rail and the arc-shaped inner slide rail are arranged in front of the knee pad, the arc-shaped outer slide rail and the arc-shaped inner slide rail are concentrically arranged, each holding slide assembly comprises a radial slide bar, a holding plate, an outer pulley block, an inner pulley block and a spring, the holding plate is in sliding fit with the radial slide bar, the front end of the radial slide bar is connected with the outer pulley block, the rear end of the radial slide bar is connected with the inner pulley block, the outer pulley block is in sliding fit with the arc-shaped outer slide rail, the inner pulley block is in sliding fit with the arc-shaped inner slide rail and slides along the arc-shaped inner slide rail, a handle is arranged on the surface of the holding plate, and the spring is arranged between the holding plate and at least one end of the front end and the rear end of the radial slide bar, the outer slide rail of arc with slide rail in the arc is the spout that the cross-section is the C type just the outer slide rail of arc with the C type opening of slide rail sets up relatively in the arc, outer assembly pulley with interior pulley group is the assembly pulley structure, the assembly pulley structure includes first slider, second slider and connecting rod, the vertical setting of connecting rod, the top of connecting rod with first slider is connected, the bottom of connecting rod with the second slider is connected, the four corners of first slider and the four corners of second slider are equipped with the pulley, the connecting rod is the lead screw, the front end and the rear end of radial slide bar are fixed with nut component respectively, nut component with the lead screw constitutes the screw-nut motion pair.

2. The dance shoulder flexibility dynamic training tensioner according to claim 1, wherein the spring is disposed between the grip plate and the front end and the rear end of the radial slide bar.

3. The dance shoulder flexibility dynamic training tensioner according to claim 2, wherein the spring is sleeved on the radial sliding rod.

4. A dance shoulder flexibility dynamic training stretcher according to claim 1, wherein the surface of the radial sliding rod is provided with an axially extending guide bar, the holding plate is provided with a hole matched with the cross section of the radial sliding rod, and the radial sliding rod penetrates through the holding plate through the hole.

5. A dance shoulder flexibility dynamic training stretcher according to claim 1, wherein a central angle corresponding to the arc-shaped outer slide rail is 80-90 °.

6. The dance shoulder flexibility dynamic training stretcher according to claim 1, wherein the radius of the arc-shaped outer slide rail is 3.8-4 m, and the difference between the radii of the arc-shaped outer slide rail and the arc-shaped inner slide rail is 20-25 cm.