A lower back training aid for dance training

Abstract

The application discloses a lower waist training auxiliary device for dance training and belongs to the technical field of dance training devices. The device comprises a bottom plate, side plates arranged on the bottom plate, an auxiliary structure and a foot pressing structure. The auxiliary structure can hold the waist of a dancer under the action of a supporting assembly and gradually overturn without affecting the lower waist training of the dancer. When the dancer is unbalanced, the back of the dancer can be supported under the action of the supporting assembly, so that the dancer can be prevented from falling. Meanwhile, the foot pressing structure can make the distance between the dancer's hands and feet equal during the lower waist training, so that the dancer can easily perform the lower waist training and the training effect is improved. The device solves the problems that the existing lower waist training auxiliary equipment cannot protect the dancer when the dancer is unbalanced and cannot standardize the lower waist action.

Description

Technical Field

[0001] This invention relates to the field of dance training device technology, and in particular to a backbend training aid for dance training. Background Technology

[0002] Dance is a performing art that uses the body to perform various elegant or difficult movements. It is generally accompanied by music and is an art form that primarily uses rhythmic movements for expression. It typically utilizes music and other props. Dance itself has diverse social meanings and functions, including exercise, social interaction / courtship, rituals, and etiquette. Before the origins of human civilization, dance was very important in ceremonies, rituals, celebrations, and entertainment. A fundamental requirement for dancers is good physical flexibility. The backbend is a physical exercise that improves flexibility. The backbend involves arching the upper body backward and supporting oneself on all fours, forming an arch shape. Therefore, backbend training is one of the best ways for dancers to develop flexibility.

[0003] The backbend is a training exercise that demands significant core strength in the lumbar spine. Therefore, to avoid injury to the lumbar spine and related bones during backbend training, protective training is necessary. A common practice is for a dance partner to provide support by using their arm as a beam. However, this method is merely a standard approach and cannot effectively ensure proper backbend technique, nor is it suitable for heavier individuals or those with weaker core strength. To address these issues, patent CN115025452B discloses a backbend training aid for dance. This device uses a head support to provide head support, reducing discomfort in the head and neck. The head support can be adjusted in angle with the front backbend support plate. However, this device still has limitations in use:

[0004] 1. During the backbend, before the bridge is formed, the upper part of the lumbar spine is suspended in the air, and the back needs adaptive support to ensure the balance of the trainee during the backbend training. However, the above-mentioned device cannot support the trainee's back before the bridge is formed, which can easily lead to failure of the backbend due to insufficient core strength of the trainee, and there is a certain risk of damage to the lumbar muscles.

[0005] 2. During the backbend, the trainee should keep their legs shoulder-width apart, arms raised, chest out and abdomen in, and bend backward into a bridge-like position with the body slightly leaning forward. However, the device described above cannot effectively control and fix the trainee's feet, which can easily cause the trainee to perform the backbend incorrectly and thus fail to achieve the required flexibility training.

[0006] Based on this, the present invention provides a backbend training aid for dance training to solve the problems existing in the prior art. Summary of the Invention

[0007] (a) Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this invention provides a backbend training aid for dance training. It features support for the dancer's waist with the aid of a support component, and the ability to gradually rotate during the backbend without affecting the training. Furthermore, it supports the dancer's back when the dancer loses balance, preventing falls and effectively protecting the dancer's safety. This invention solves the problems of existing backbend training aids, such as inconvenience in protecting dancers when they lose balance and the inability to standardize backbend movements.

[0009] (II) Technical Solution

[0010] To achieve the aforementioned goals of supporting and protecting the dancer's lower back during backbends and ensuring proper backbend technique, this invention provides the following technical solution:

[0011] A dance training backbend assist device includes: a base plate, a side plate fixedly installed on one side of the top of the base plate, an auxiliary structure installed on the top of the base plate, and a presser foot structure installed on the surface of the base plate.

[0012] The auxiliary structure includes a support component and an adjustment component. The support component includes a first support arc plate fixedly installed on the top of the base plate and a second support arc plate rotatably installed on the top of the base plate and symmetrically distributed with the first support arc plate.

[0013] A connecting cylinder located below the second supporting arc plate is also provided on the base plate. A push plate is slidably installed inside the connecting cylinder. A support rod is fixedly connected to the top of the push plate. The upper end of the support rod passes through the connecting cylinder and is connected to the bottom of the second supporting arc plate. An adjustment cavity is formed between the bottom of the push plate and the inner wall of the connecting cylinder.

[0014] The adjustment assembly includes a liquid storage cylinder mounted on the surface of the side plate and a slider slidably connected to the side plate. A trigger rod extending into the interior of the liquid storage cylinder is fixed on the slider. A squeezing plate is fixed to the end of the trigger rod. A liquid storage cavity is formed between the squeezing plate and the inner wall of the liquid storage cylinder. The liquid storage cavity is connected to the adjustment cavity through a conduit. The liquid storage cavity, the conduit, and the adjustment cavity are filled with hydraulic oil.

[0015] In a preferred embodiment of the present invention, a connecting rod is fixed to one end of the first supporting arc plate, and two symmetrically distributed mounting rings are rotatably connected to the surface of the connecting rod. Two symmetrically distributed mounting seats are fixedly connected to one end of the second supporting arc plate, and the mounting seats are fixedly connected to the end of the connecting rod.

[0016] In a preferred embodiment of the present invention, a flexible gasket is adhered between the surfaces of the first supporting arc plate and the second supporting arc plate, the flexible gasket being used to cover the gap between the second supporting arc plate and the first supporting arc plate.

[0017] In a preferred embodiment of the present invention, two symmetrically distributed sliding grooves are provided at the bottom of the second support arc plate, a sliding seat is slidably connected in the sliding groove, a rotating block is rotatably connected to the inner side of the sliding seat, and the top of the support rod is fixedly connected to the rotating block.

[0018] In a preferred embodiment of the present invention, a first spring is sleeved on the surface of the support rod, the upper end of the first spring is fixedly connected to the inner wall of the connecting cylinder, and the bottom of the first spring is fixedly connected to the top of the push plate.

[0019] In a preferred embodiment of the present invention, a second spring is movably sleeved on the surface of the trigger rod, a fixing plate is fixedly connected to the surface of the trigger rod, the upper end of the second spring is fixedly connected to the surface of the liquid storage cylinder, and the lower end of the second spring is fixedly connected to the surface of the fixing plate.

[0020] In a preferred embodiment of the present invention, the presser foot structure includes a movable groove formed on the top of the base plate, and two symmetrically distributed mounting blocks are slidably installed in the movable groove. An inverted "U"-shaped limiting shell is fixedly connected to the top of the mounting blocks.

[0021] In a preferred embodiment of the present invention, a sliding rod is fixedly connected to one side of the mounting block, and a connecting plate that is slidably connected to the side plate surface is fixedly connected to the other end of the sliding rod. A handle is provided on the side of the connecting plate near the support assembly.

[0022] In a preferred embodiment of the present invention, a sliding block is fixedly connected to one side of the grip and slidably connected to the inner wall of the connecting plate, and an mounting rod is fixedly connected to the other side of the sliding block. Two mounting grooves are formed on one side of the slider, and the other side of the mounting rod is slidably connected to the inner wall of the adjacent mounting groove.

[0023] In a preferred embodiment of the present invention, the sliding rod is configured to simultaneously adjust the distance between the two limiting shells and the distance between the two grips when moving the connecting plate.

[0024] (III) Beneficial Effects

[0025] Compared with the prior art, the present invention provides a backbend training aid for dance training, which has the following beneficial effects:

[0026] 1. Through the setting of the auxiliary structure, the waist of the dancer can be supported by the support component. As the dancer bends over, the gradual rotation will not affect the dancer's backbend training. When the dancer loses balance, the back of the dancer can be supported by the support component to prevent falls. This effectively protects the safety of the dancer and realizes the protection against imbalance during training.

[0027] 2. By adjusting the settings of the components, the position of the slider can be adjusted during use to adjust the rotation arc of the second support arc plate, thereby making the second support arc plate easier to support the back of dancers at different training levels, effectively meeting the training needs of dancers at different training levels.

[0028] 3. The foot-pressing structure ensures that the distance between the dancer's hands and feet is equal during the backbend, facilitating the backbend and correcting any deviations in the movement. Furthermore, the handles provide hand support, reducing the difficulty of the backbend and ensuring proper form, thus improving training effectiveness. This addresses the problems of existing backbend training aids, such as inconvenience in protecting dancers from imbalance and difficulty in standardizing backbend movements. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the backbend training aid for dance training of the present invention;

[0031] Figure 2 This is a partial cross-sectional view of the backbend training aid for dance training of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the support component of the present invention;

[0033] Figure 4 This is a schematic diagram of the auxiliary structure of the present invention;

[0034] Figure 5 For the present invention Figure 4 A magnified view of a section at point A in the middle;

[0035] Figure 6 This is a schematic diagram showing the connection between the sliding rod and the mounting block of the present invention;

[0036] Figure 7 This is a schematic diagram showing the connection between the connecting plate and the side plate of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the adjustment component of the present invention;

[0038] Figure 9 This is a schematic diagram showing the connection between the grip, sliding block, and mounting rod of the present invention.

[0039] Figure label:

[0040] 1. Base plate; 2. Auxiliary structure; 21. Support assembly; 2101. First support arc plate; 2102. Connecting rod; 2103. Mounting ring; 2104. Gasket; 2105. Second support arc plate; 2106. Slide seat; 2107. Rotating block; 2108. Support rod; 2109. Connecting cylinder; 2110. Slide groove; 2111. First spring; 22. Adjustment assembly; 2201. Slider; 2202. Mounting groove; 2203. Trigger rod; 2204. Extrusion plate; 2205. Second spring; 2206. Conduit; 2207. Liquid storage cylinder; 3. Side plate; 4. Pressing foot structure; 401. Limiting shell; 402. Moving groove; 403. Sliding rod; 404. Mounting block; 405. Connecting plate; 406. Handle; 407. Sliding block; 408. Mounting rod. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0046] Example 1:

[0047] Please see Figures 1-9 The present invention provides a technical solution:

[0048] A dance training aid for bending over backwards includes a base plate 1, an auxiliary structure 2, and a foot-pressing structure 4; wherein:

[0049] The base plate 1 is a plate-shaped structure, and a side plate 3 is fixedly installed on one side of the top of the base plate 1;

[0050] The auxiliary structure 2 is installed on the top of the base plate 1 and located on one side of the side plate 3, and is used to assist the dancer in backbend training.

[0051] The presser foot structure 4 is installed on the surface of the base plate 1 and is used to fix the feet and hands of the dancer during the backbend training to ensure the safety and comfort of the dancer during the backbend.

[0052] It should be noted that, in this embodiment, the base plate 1, auxiliary structure 2, and foot-pressing structure 4 constitute a device for dance trainees to perform backbend training. Specifically, in use, the dance trainee inserts both feet into the foot-pressing structure 4 to fix their feet, and then uses the auxiliary structure 2 to assist in the backbend training, thus solving the problem that existing backbend training auxiliary devices are not convenient for protecting the dance trainee when they lose balance.

[0053] Example 2:

[0054] Unlike Embodiment 1 described above, as Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, the auxiliary structure 2 includes a support component 21 installed on the top of the base plate 1, and an adjustment component 22 is installed on the side of the side plate 3 away from the support component 21. During the backbend in dance training, the support component 21 is used to support the waist of the dancer, and the adjustment component 22 is used to adjust the support component 21 during the backbend so that its support height can meet the training needs of dancers with different flexibility levels.

[0055] As a preferred embodiment, such as Figure 2 , Figure 3 and Figure 5 As shown, the support assembly 21 includes a first support arc plate 2101 and a second support arc plate 2105; wherein: the first support arc plate 2101 is fixedly installed on the top of the base plate 1, and a connecting rod 2102 is provided at the other end of the first support arc plate 2101, and two symmetrically distributed mounting rings 2103 are rotatably connected to the surface of the connecting rod 2102; the second support arc plate 2105 is rotatably installed on one side of the top of the base plate 1, symmetrically distributed with the first support arc plate 2101, and two symmetrically distributed mounting seats are fixedly connected to one end surface of the second support arc plate 2105, the other end of the mounting seat is fixedly connected to the end of the connecting rod 2102, and a flexible gasket 2104 is adhered between the surfaces of the first support arc plate 2101 and the second support arc plate 2105.

[0056] It should be noted that, in this embodiment, by setting the first support arc plate 2101 and the second support arc plate 2105, the second support arc plate 2105 can be used to support and protect the dancer during the backbend training, so as to avoid damage to the lumbar bones and muscles during the backbend training.

[0057] As a preferred embodiment, such as Figure 1 , Figure 2 ,and Figure 3As shown, two connecting cylinders 2109 are fixedly connected to the top of the base plate 1 and located below the second supporting arc plate 2105. A push plate is slidably installed inside the connecting cylinder 2109. A support rod 2108 is fixedly connected to the top of the push plate. The upper end of the support rod 2108 extends through the connecting cylinder 2109, forming an adjustment cavity between the bottom of the push plate and the inner wall of the connecting cylinder 2109. Two symmetrically distributed sliding grooves 2110 are opened at the bottom of the second supporting arc plate 2105. A slide block 2106 is slidably connected to the inner side of the 10. One side of the slide block 2106 extends through a slide groove 2110 and slides along the slide groove 2110. A rotating block 2107 is rotatably connected to the inner side of the slide block 2106. The top of the support rod 2108 is fixedly connected to the surface of the rotating block 2107. A first spring 2111 is sleeved on the surface of the support rod 2108. The upper end of the first spring 2111 is fixedly connected to the inner wall of the connecting cylinder 2109, and the bottom of the first spring 2111 is fixedly connected to the top of the push plate.

[0058] It should be noted that, in this embodiment, with the above-described structure, under normal conditions, the first spring 2111 can drive the support rod 2108 to push the rotating block 2107 to drive the slide block 2106 to slide along the inner wall of the slide groove 2110, thereby pushing the second support arc plate 2105 to rotate around the connecting rod 2102 as the rotation center. The pad 2104 is made of fabric and is used to cover the gap between the second support arc plate 2105 and the first support arc plate 2101. During the backbend process, by gradually pressing down on the second support arc plate 2105, the second support arc plate 2105 gradually rotates and stretches the first spring 2111. The first support arc plate 2101 can initially guide the dancer's legs, making the backbend process smoother. When the balance is lost, the first spring 2111 can drive the first support arc plate 2101 to support the dancer's back, preventing a direct fall and improving the safety during the backbend training process.

[0059] As a preferred embodiment, such as Figure 2 , Figure 5 and Figure 6 As shown, the adjustment assembly 22 includes a slider 2201, two trigger rods 2203, and a liquid storage cylinder 2207; wherein: the slider 2201 is slidably connected to the side of the side plate 3 away from the second support arc plate 2105, and two mounting slots 2202 are provided on one side of the slider 2201; the two trigger rods 2203 are symmetrically arranged on the top of the slider 2201 and fixedly connected to the top of the slider 2201; the liquid storage cylinder 2207 is fixedly installed on the surface of the side plate 3 and is coaxially arranged with the two trigger rods 2203.

[0060] It should be noted that, in this embodiment, with the above-described structure, when the adjusting slider 2201 moves upward, it compresses the second spring 2205, and the trigger rod 2203 is inserted into the liquid storage cylinder 2207.

[0061] As a preferred embodiment, such as Figure 8 As shown, the upper end of the trigger rod 2203 passes through the liquid storage cylinder 2207 and is fixedly connected to the extrusion plate 2204. A liquid storage cavity is formed between the top of the extrusion plate 2204 and the interior of the liquid storage cylinder 2207, and the interior of the liquid storage cavity is filled with hydraulic oil. The surface of the liquid storage cylinder 2207 is also provided with a conduit 2206 that communicates with the liquid storage cavity, and the other end of the conduit 2206 is connected to the adjustment cavity.

[0062] It should be noted that in this embodiment, the support component 21 and the adjustment component 22 are connected by the conduit 2206 so that the range of motion of the second support arc plate 2105 can be adjusted by moving the adjustment slider 2201, so that the second support arc plate 2105 can easily support the back of dancers at different training levels to meet the training needs of dancers at different training levels.

[0063] As a preferred embodiment, such as Figure 4 and Figure 8 As shown, a second spring 2205 is movably sleeved on the surface of the trigger rod 2203, and a fixing plate is fixedly connected to the surface of the trigger rod 2203. The upper end of the second spring 2205 is fixedly connected to the surface of the liquid storage cylinder 2207, and the lower end of the second spring 2205 is fixedly connected to the surface of the fixing plate.

[0064] It should be noted that in this embodiment, by moving the slider 2201 upward, the trigger rod 2203 can be inserted into the liquid storage cylinder 2207. During this process, the extrusion plate 2204 can be driven to extrude the hydraulic oil stored in the liquid storage chamber, so that the hydraulic oil can be introduced into the regulating chamber through the conduit 2206, thereby pushing the push plate to move the support rod 2108 upward. Under normal conditions, the slider 2201 can be kept relatively close to the liquid storage cylinder 2207 under the action of the second spring 2205, thereby ensuring that the support rod 2108, together with the first support arc plate 2101, provides good support for the back of the dance trainee, and avoids damage to the back spine and bones of the dance trainee when performing back bridge.

[0065] In this embodiment, by setting up the support component 21 and adjustment component 22 that can generate linkage, the dance trainee can adjust the height of the slider 2201 according to the training needs when the dance trainee fails to use it, so that the second support arc plate 2105 can support the back of the dance trainee at different training levels, so as to meet the training needs of the dance trainee at different training levels and realize a diversified use process. In practical use: Under normal conditions, the first spring 2111 can push the second support arc plate 2105 to rotate upward around the connecting rod 2102, providing support for the dancer's back when bending over in the initial state; during the bending over process, the dancer gradually presses down on the second support arc plate 2105, causing the second support arc plate 2105 to gradually rotate and stretch the first spring 2111, so that the first support arc plate 2101 can initially guide the dancer's legs, making the bending over process smoother. When losing balance, the first spring 2111 can drive the first support arc plate 2101 to support the dancer's back, preventing direct falls and improving the safety of the dancer during the bending over process.

[0066] Simultaneously, the position of slider 2201 on the side plate 3 is adjusted according to the degree of backbend of the dance trainee. This adjustment of slider 2201 allows for adjustment of the maximum rotation of the second support arc plate 2105, ensuring its rotation meets the backbend training needs of dance trainees at different training levels. The specific adjustment principle of slider 2201 is as follows: adjusting slider 2201 upwards along the side plate 3 causes trigger rod 2203 to insert into the reservoir 2207. During this process, the extrusion plate 2204 extrudes the hydraulic oil stored inside the reservoir. This allows hydraulic oil to be introduced into the regulating chamber through the conduit 2206, thereby pushing the push plate to move the support rod 2108 upward and controlling the maximum rotation of the second support arc plate 2105. Under normal conditions, the second spring 2205 keeps the slider 2201 relatively close to the reservoir 2207, thus ensuring that the support rod 2108 works in conjunction with the first support arc plate 2101 to provide good support for the dancer's back, so as to avoid damage to the back spine and bones when the dancer performs back bridge, while meeting the backbend training needs of dancers at different training levels.

[0067] Example 3:

[0068] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 9As shown, the presser foot structure 4 includes a movable groove 402 opened on the top of the base plate 1. Two mounting blocks 404 are slidably installed in the movable groove 402 and are symmetrically distributed. The top of the mounting block 404 extends through the movable groove 402 and is fixedly connected to a limiting shell 401. The cross-sectional shape of the limiting shell 401 is approximately an inverted "U" shape and is used in conjunction with the human foot.

[0069] It should be noted that, in this embodiment, the aforementioned movable groove 402 and mounting block 404 allow the limiting shell 401 to fix the dancer's feet during use, ensuring foot stability for backbend training. Simultaneously, the relative distance between the two mounting blocks 404 can be adjusted by moving the mounting block 404 within the movable groove 402 and by moving the sliding rod 403 on the base plate 1, thus meeting the training needs of different dancers with varying leg and arm widths.

[0070] As a preferred embodiment, such as Figure 3 , Figure 6 and Figure 9 As shown, a sliding rod 403 is fixedly connected to the middle of one side of the mounting block 404. The other end of the sliding rod 403 is fixedly connected to a connecting plate 405 that is slidably connected to the surface of the side plate 3. A handle 406 is provided on the side of the connecting plate 405 near the second support arc plate 2105. A sliding block 407 that is slidably connected to the inner wall of the connecting plate 405 is fixedly connected to one side of the handle 406. An mounting rod 408 is fixedly connected to the other side of the sliding block 407. The other side of the mounting rod 408 is slidably connected to the inner wall of the adjacent mounting groove 2202. The applicable width can be adjusted by adjusting the position of the mounting rod 408 in the mounting groove 2202.

[0071] It should be noted that in this embodiment, the dancer places their foot inside the limiting shell 401, and their hand can reach around the first support arc plate 2101 to grasp the handle 406, protecting the dancer and causing the handle 406 to gradually move downwards. During this process, the handle 406 can drive the sliding block 407 and the mounting rod 408 to move downwards simultaneously, thereby causing the extrusion plate 2204 to move downwards along the inner wall of the liquid storage cylinder 2207, achieving the effect of increasing the internal space of the liquid storage cavity. This allows the dancer to press down on the second support arc plate 2105 during the backbend process, thereby driving the support... The rod 2108 retracts into the connecting cylinder 2109, thereby cooperating with the push plate to squeeze the hydraulic oil stored inside the connecting cylinder 2109 and guide it back to the storage chamber through the conduit 2206. When the dancer loses balance, he will subconsciously loosen the grip 406. At this time, the grip 406 is not affected by the dancer's pulling force. Then, under the action of the second spring 2205, it drives the slider 2201 and the trigger rod 2203 to reset. This can cooperate with the support component 21 to reset the second support arc plate 2105 to support the dancer's back, further preventing the dancer from falling.

[0072] The sliding bar 403 ensures that the distance between the two grips 406 and the distance between the two limiting shells 401 are equal during use, thus ensuring that the dancer's feet and hands open at the same width, which facilitates the dancer's backbend practice.

[0073] The working principle of the dance training backbend assist device of the present invention includes: during the use of this device, the dancer's feet can be placed inside the limiting shell 401, which can prevent the feet from shifting and causing a fall under the restriction of the limiting shell 401. The hands can pass around the first support arc plate 2101 to grasp the handle 406 and drive the handle 406 to gradually move down, so that the dancer's hands have a support point to improve stability during the backbend. When the dancer presses down on the second support arc plate 2105 during the backbend, it can drive the support rod 2108 to retract into the connecting cylinder 2109. When the dancer loses balance, he will subconsciously release the handle 406. At this time, the handle 406 is not affected by the dancer's pulling force. Then, under the action of the second spring 2205, the slider 2201 and the trigger rod 2203 are reset, so as to cooperate with the support component 21 to reset the second support arc plate 2105 to support the dancer's back and prevent the dancer from falling.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0075] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dance training aid for bending over backwards, characterized in that, include: The base plate (1), the side plate (3) fixedly installed on one side of the top of the base plate (1), the auxiliary structure (2) installed on the top of the base plate (1), and the pressure foot structure (4) installed on the surface of the base plate (1). The auxiliary structure (2) includes a support component (21) and an adjustment component (22). The support component (21) includes a first support arc plate (2101) fixedly installed on the top of the base plate (1) and a second support arc plate (2105) rotatably installed on the top of the base plate (1) and symmetrically distributed with the first support arc plate (2101). A connecting cylinder (2109) located below the second support arc plate (2105) is also provided on the base plate (1). A push plate is slidably installed inside the connecting cylinder (2109). A support rod (2108) is fixedly connected to the top of the push plate. The upper end of the support rod (2108) passes through the connecting cylinder (2109) and is connected to the bottom of the second support arc plate (2105). An adjustment cavity is formed between the bottom of the push plate and the inner wall of the connecting cylinder (2109). The adjustment assembly (22) includes a liquid storage cylinder (2207) mounted on the surface of the side plate (3) and a slider (2201) slidably connected to the side plate (3). A trigger rod (2203) extending into the liquid storage cylinder (2207) is fixed on the slider (2201). A squeezing plate (2204) is fixed at the end of the trigger rod (2203). A liquid storage cavity is formed between the squeezing plate (2204) and the inner wall of the liquid storage cylinder (2207). The liquid storage cavity is connected to the adjustment cavity through a conduit (2206). The liquid storage cavity, the conduit (2206) and the adjustment cavity are filled with hydraulic oil.

2. The dance training backbend assist device according to claim 1, characterized in that, One end of the first support arc plate (2101) is fixed with a connecting rod (2102), and two symmetrically distributed mounting rings (2103) are rotatably connected to the surface of the connecting rod (2102). One end of the second support arc plate (2105) is fixedly connected with two symmetrically distributed mounting seats, and the mounting seats are fixedly connected to the end of the connecting rod (2102).

3. The dance training backbend assist device according to claim 2, characterized in that, A flexible gasket (2104) is bonded between the surfaces of the first support arc plate (2101) and the second support arc plate (2105). The flexible gasket (2104) is used to cover the gap between the second support arc plate (2105) and the first support arc plate (2101).

4. The dance training backbend assist device according to claim 1, characterized in that, The bottom of the second support arc plate (2105) has two symmetrically distributed sliding grooves (2110). A sliding block (2106) is slidably connected in the sliding groove (2110). A rotating block (2107) is rotatably connected inside the sliding block (2106). The top of the support rod (2108) is fixedly connected to the rotating block (2107).

5. The dance training backbend assist device according to claim 1, characterized in that, The surface of the support rod (2108) is fitted with a first spring (2111), the upper end of the first spring (2111) is fixedly connected to the inner wall of the connecting cylinder (2109), and the bottom of the first spring (2111) is fixedly connected to the top of the push plate.

6. The dance training backbend assist device according to claim 1, characterized in that, The surface of the trigger rod (2203) is movably fitted with a second spring (2205), and a fixing plate is fixedly connected to the surface of the trigger rod (2203). The upper end of the second spring (2205) is fixedly connected to the surface of the liquid storage cylinder (2207), and the lower end of the second spring (2205) is fixedly connected to the surface of the fixing plate.

7. The dance training backbend assist device according to claim 1, characterized in that, The presser foot structure (4) includes a moving groove (402) opened on the top of the base plate (1). Two symmetrically distributed mounting blocks (404) are slidably installed in the moving groove (402). An inverted "U"-shaped limiting shell (401) is fixedly connected to the top of the mounting block (404).

8. The dance training backbend assist device according to claim 7, characterized in that, A sliding rod (403) is fixedly connected to one side of the mounting block (404), and a connecting plate (405) that is slidably connected to the surface of the side plate (3) is fixedly connected to the other end of the sliding rod (403). A handle (406) is provided on the side of the connecting plate (405) near the support assembly (21).

9. The dance training backbend assist device according to claim 8, characterized in that, One side of the grip (406) is fixedly connected to a sliding block (407) that is slidably connected to the inner wall of the connecting plate (405). The other side of the sliding block (407) is fixedly connected to an installation rod (408). Two installation slots (2202) are opened on one side of the slider (2201). The other side of the installation rod (408) is slidably connected to the inner wall of the adjacent installation slot (2202).

10. A dance training backbend assist device according to claim 9, characterized in that, The sliding rod (403) is configured to simultaneously adjust the distance between the two limiting shells (401) and the distance between the two grips (406) when the connecting plate (405) is moved.

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