CN220213800U - Multifunctional teaching and practicing device for aerobics exercises - Google Patents

Abstract

The utility model discloses a multifunctional teaching and practicing device for aerobics exercises, which relates to the field of aerobics exercises and comprises a recovery box, wherein a connecting shaft is rotatably arranged on the recovery box, a winding structure is arranged on the connecting shaft, and two connecting plates are fixedly arranged on the recovery box. According to the utility model, through the arrangement of structures such as the body building pad and the pressure lever, a user can conduct teaching or exercise of body building on the body building pad by utilizing the body building pad, legs can be put on the pressure lever to press the legs and warm up the body before exercise, the pressure lever can be adjusted in height according to the height of the user and the practice habit, the user can lie on the body building pad by adjusting the angle of the support lever to keep the support lever at a level with the recovery box, the foot of the user is pressed or blocked by utilizing the pressure lever, so that the user can conduct sit-up exercise, the requirement of multiple exercise of the user is met, the adjustment process is simple to operate, and the practicability is strong.

Description

Multifunctional teaching and practicing device for aerobics exercises

Technical Field

The utility model relates to the technical field of aerobics equipment, in particular to a multifunctional teaching and practicing device for aerobics.

Background

Aerobics exercises are sports which are popular and widely popularized by masses and integrate gymnastics, dances, music, body building and entertainment.

In the prior art, the structure and the function of the existing aerobics teaching exercise device are single, when a user has the requirements of various exercises (such as leg pressing and body warming or sit-ups, etc.), a plurality of different instruments are needed to be used alternately, the device is inconvenient, more instruments occupy space and are inconvenient to store, and therefore the requirement of people is met by the aerobics multifunctional teaching exercise device.

Disclosure of Invention

The utility model aims to provide a multifunctional teaching and practicing device for aerobics, which solves the problems that when a user has various practicing demands (such as leg pressing, body warming, sit-ups and the like), a plurality of different instruments are needed to be used alternately, so that the device is inconvenient, more instruments occupy space and the device is inconvenient to store.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a multifunctional teaching and practicing device for aerobics exercises, includes the collection box, rotate on the collection box and install the connecting axle, install rolling structure on the connecting axle, fixed mounting has two connecting plates on the collection box, equal fixed mounting has the pivot on two connecting plates, installs same regulation bearing structure in two pivots, adjusts and installs two stationary blades on the bearing structure, all installs upset limit structure on two stationary blades.

Preferably, the winding structure comprises a winding roller, the winding roller is fixedly arranged on a connecting shaft, a movable groove is formed in a recovery box, one end of a body building pad is fixedly arranged on the winding roller, the other end of the body building pad penetrates through the movable groove, a first gear is fixedly arranged at one end of the connecting shaft, a second gear is rotatably arranged at one side of the recovery box and meshed with the first gear, a handle is rotatably arranged at one side of the second gear, two fixing blocks are symmetrically and fixedly arranged at one side of the recovery box, one fixing shaft is fixedly arranged at one side, close to each other, of the two fixing blocks, a movable clamping plate is rotatably arranged on the fixing shaft, a clamping groove is formed in the movable clamping plate, and the handle is movably arranged in the clamping groove.

Preferably, the movable clamping plate is provided with a rotating hole, the fixed shaft is rotatably arranged in the rotating hole, the fixed shaft is fixedly sleeved with a first torsion spring, one end of the first torsion spring is fixedly arranged on the inner wall of the rotating hole, and the other end of the first torsion spring is fixedly arranged on the fixed shaft.

Preferably, the adjusting and supporting structure comprises two supporting rods, the two supporting rods are respectively rotatably installed on the two rotating shafts, the adjusting rods are slidably installed on the inner walls of the two supporting rods, the same pressing rod is fixedly installed on the two adjusting rods, fixing strips are fixedly installed on one sides of the two adjusting rods, limiting plates are rotatably installed on the two fixing strips, limiting blocks are fixedly installed on two sides of the two limiting plates, two limiting strips are fixedly installed on the two supporting rods, a plurality of limiting grooves are formed in the four limiting strips, and the four limiting blocks are movably installed in the corresponding four limiting grooves respectively.

Preferably, the movable hole is formed in the fixing strip, the limiting shaft is rotatably mounted in the movable hole, the limiting shaft is fixedly mounted on the limiting plate, the limiting shaft is fixedly sleeved with the second torsion spring, one end of the second torsion spring is fixedly mounted on the inner wall of the movable hole, and the other end of the second torsion spring is fixedly mounted on the limiting shaft.

Preferably, two limiting sliding grooves are formed in the adjusting rod, limiting blocks are slidably mounted in the two limiting sliding grooves, and the two limiting blocks are fixedly mounted on inner walls of two sides of the supporting rod respectively.

Preferably, the overturning limiting structure comprises a sliding rod, the sliding rod is slidably mounted on a fixing plate, the fixing plate is fixedly mounted on one side of a supporting rod, a limiting sleeve block is fixedly mounted on the sliding rod and slidably mounted on one side of the supporting rod, two sleeve grooves are formed in the limiting sleeve block, first sleeve rods are movably mounted in the two sleeve grooves, the two first sleeve rods are fixedly mounted on a connecting plate, two second sleeve rods are fixedly mounted on the connecting plate, and the two second sleeve rods are respectively matched with the two sleeve grooves.

Preferably, the sliding rod is sleeved with a spring in a sliding manner, and two ends of the spring are respectively fixedly arranged on one side, close to each other, of the fixing piece and the limiting sleeve block.

The beneficial effects of the utility model are as follows:

according to the utility model, through the arrangement of structures such as the body building pad and the pressure bar, a user can conduct teaching or exercise of body building on the body building pad by utilizing the body building pad, legs can be put on the pressure bar to press the legs and warm up the body before exercise, the pressure bar can be adjusted in height according to the height of the user and the practice habit, the user can lie on the body building pad by adjusting the angle of the support bar to keep the support bar horizontal with the recovery box, the foot of the user is pressed or blocked by utilizing the pressure bar, so that the user can conduct training of sit-ups, the requirement of multiple exercises of the user is met, the adjustment process is simple to operate, and the practicability is strong.

According to the utility model, through the arrangement of the structures such as the wind-up roller and the support rod, the second gear can rotate by turning over the movable clamping plate and pulling the handle, the rotating second gear can drive the connecting shaft to rotate through the cooperation with the first gear, so that the wind-up roller is driven to rotate and the body building pad is wound, then the support rod is turned over to keep parallel with the recovery box, the recovery press rod is in contact with the recovery box, the storage operation can be completed, the occupied space of equipment is reduced, and the household storage is convenient.

Drawings

FIG. 1 is a schematic diagram of a multifunctional teaching and training device for aerobics exercises;

FIG. 2 is a schematic cross-sectional view of a multifunctional teaching and training device for aerobics exercises according to the present utility model;

FIG. 3 is a schematic view of a part of a multifunctional teaching and training device for aerobics exercises according to the present utility model;

FIG. 4 is a schematic view of the structure of the support rod portion of the multifunctional aerobics teaching and practicing device according to the present utility model;

fig. 5 is a schematic cross-sectional view of a fixing strip of the multifunctional aerobics teaching and practicing device according to the present utility model.

In the figure: 100. a recovery box; 200. a connecting shaft; 201. a wind-up roll; 202. a movable groove; 203. a body building pad; 204. a first gear; 205. a second gear; 206. a handle; 207. a fixed block; 208. a fixed shaft; 209. a movable clamping plate; 210. a clamping groove; 211. a rotation hole; 212. a first torsion spring; 300. a connecting plate; 301. a rotating shaft; 302. a support rod; 303. an adjusting rod; 304. a compression bar; 305. a fixing strip; 306. a limiting plate; 307. a limiting block; 308. a limit bar; 309. a limit groove; 310. a movable hole; 311. a limiting shaft; 312. a second torsion spring; 313. limiting sliding grooves; 314. a limiting block; 400. a fixing piece; 401. a slide bar; 402. a stop collar block; 403. a sleeve groove; 404. a first loop bar; 405. a second loop bar; 406. and (3) a spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-5, an aerobics multifunctional teaching exercise device, including a recovery box 100, a connecting shaft 200 is rotatably installed on the recovery box 100, a winding structure is installed on the connecting shaft 200, two connecting plates 300 are fixedly installed on the recovery box 100, two rotating shafts 301 are fixedly installed on the two connecting plates 300, the same adjusting support structure is installed on the two rotating shafts 301, two fixing plates 400 are installed on the adjusting support structure, a turnover limiting structure is installed on the two fixing plates 400, through turnover limiting plates 306 on two sides, the rotating limiting plates 306 can drive the limiting shaft 311 to rotate in a movable hole 310 on a fixed bar 305, the turnover effect is realized, a second torsion spring 312 is compressed while the limiting shaft 311 rotates, the continuously turnover limiting plates 306 can drive a limiting block 307 to separate from a limiting groove 309 on the limiting bar 308, and thus the limitation of the adjusting bar 303 can be relieved, the adjusting rod 303 can slide on the two limiting blocks 314 through the two limiting sliding grooves 313 respectively, so that the moving direction of the adjusting rod 303 is limited, the adjusting rod 303 can drive the pressing rod 304 to move when moving, thus the adjustment of the pressing rod 304 is realized, after the adjustment is finished, the limiting plate 306 is released, the compressed second torsion spring 312 can be released and drive the limiting shaft 311 to rotate and reset, the reset limiting shaft 311 can drive the limiting plate 306 to turn over and reset, the limiting plate 306 drives the limiting block 307 to reinsert into the limiting groove 309 at the corresponding position, the position of the pressing rod 304 is limited, the user can conveniently adjust the height of the pressing rod 304 according to the requirement, the user can press legs on the pressing rod 304 to warm up before making an aerobics operation, the aerobics pad 203 is arranged to facilitate the user to make the aerobics operation on the aerobics pad 203, and the sliding rods 401 on two sides are pulled to drive the limiting sleeve block 402 to move, the moving limiting sleeve block 402 presses the spring 406 through the matching with the fixing piece 400, the limiting sleeve block 402 drives the sleeve groove 403 to separate from the first sleeve rod 404 when moving, the limiting on the supporting rod 302 can be released, the supporting rod 302 can be overturned, the supporting rod 302 is rotated ninety degrees, the supporting rod 302 is overturned and simultaneously drives the limiting sleeve block 402 to move along with the moving, the sleeve groove 403 on the limiting sleeve block 402 corresponds to the second sleeve rod 405, at the moment, the compressed spring 406 releases and pushes the limiting sleeve block 402 to reset, the reset limiting sleeve block 402 drives the sleeve groove 403 to be sleeved on the second sleeve rod 405, the current angle of the supporting rod 302 is limited, the adjusting step of the supporting rod 302 is completed, and a user can lie on the body building pad 203 at the moment, the pressing rod 304 can be pressed at the foot position of the user so that the user can do sit-up training, when the user uses up, the movable clamping plate 209 can be turned over, the movable clamping plate 209 can rotate on the fixed shaft 208 through the rotating hole 211 and compress the first torsion spring 212, the continuously turned movable clamping plate 209 can drive the clamping groove 210 to be separated from the handle 206, at the moment, the handle 206 is pushed to drive the second gear 205 to rotate, the rotating second gear 205 can drive the connecting shaft 200 to rotate through meshing with the first gear 204, the rotating connecting shaft 200 drives the winding roller 201 to rotate, the rotating winding roller 201 can wind the body building pad 203, meanwhile, the angle of the supporting rod 302 is adjusted to enable the supporting rod to be parallel to the recovery box 100, and the accommodating pressing rod 304 is accommodated to enable the supporting rod to be close to the recovery box 100, so that accommodating operation can be completed, and occupied space is reduced.

Further, the winding structure comprises a winding roller 201, winding roller 201 fixed mounting is on connecting axle 200, movable groove 202 has been seted up on recovery box 100, fixed mounting has the one end of body building pad 203 on winding roller 201, the other end of body building pad 203 runs through movable groove 202, connecting axle 200's one end fixed mounting has first gear 204, second gear 205 is installed in one side rotation of recovery box 100, second gear 205 meshes with first gear 204 mutually, handle 206 is installed in one side rotation of second gear 205, two fixed blocks 207 are installed in one side symmetry fixed mounting of recovery box 100, same fixed axle 208 is installed in one side fixed mounting that two fixed blocks 207 are close to each other, movable cardboard 209 is installed in the rotation on the fixed axle 208, draw-in groove 210 has been seted up on the movable cardboard 209, handle 206 movable mounting is in draw-in groove 210, the movable cardboard 209 rotates and can rotate and compress first torsional spring 212 on fixed axle 208, the movable cardboard 209 that keeps turning over can drive draw-in groove 210 and break away from handle 206, promote handle 206 to make it drive second gear 205 rotate, second gear 205 can drive the rotation with first gear 204 through rotating second gear 205, the same fixed axle 208 is installed on one side fixed axle 208, make winding roller 201 rotate and can drive winding roller 201 to rotate and make and connect to rotate, and make the winding roller 201 rotate and can rotate and make and take up.

Further, a rotation hole 211 is formed in the movable clamping plate 209, the fixed shaft 208 is rotatably mounted in the rotation hole 211, the fixed shaft 208 is fixedly sleeved with a first torsion spring 212, one end of the first torsion spring 212 is fixedly mounted on the inner wall of the rotation hole 211, the other end of the first torsion spring 212 is fixedly mounted on the fixed shaft 208, and the movable clamping plate 209 rotates to rotate on the fixed shaft 208 through the rotation hole 211 and compress the first torsion spring 212.

Further, the adjusting support structure comprises two support rods 302, the two support rods 302 are respectively and rotatably installed on the two rotating shafts 301, the inner walls of the two support rods 302 are respectively and slidably provided with an adjusting rod 303, the two adjusting rods 303 are fixedly provided with the same pressing rod 304, one sides of the two adjusting rods 303 are respectively and fixedly provided with a fixed strip 305, the two fixed strips 305 are respectively and rotatably provided with a limiting plate 306, two sides of the two limiting plates 306 are respectively and fixedly provided with a limiting block 307, the two support rods 302 are respectively and fixedly provided with two limiting strips 308, the four limiting strips 308 are respectively and movably provided with a plurality of limiting grooves 309, the limiting plates 306 at two sides are turned over, the rotating limiting plates 306 can drive the limiting shafts 311 to rotate in the movable holes 310 on the fixed strips 305 to realize the turning effect, the limiting shaft 311 rotates and compresses the second torsion spring 312, the continuously turned limiting plate 306 drives the limiting block 307 to separate from the limiting groove 309 on the limiting bar 308, so that the limitation of the adjusting rod 303 can be relieved, the adjusting rod 303 can slide on the two limiting blocks 314 through the two limiting sliding grooves 313 respectively by pulling the adjusting rod 303, the moving direction of the adjusting rod 303 is limited, the adjusting rod 303 can drive the pressing rod 304 to move when moving, the adjustment of the pressing rod 304 is realized, after the adjustment is finished, the limiting plate 306 is released, the compressed second torsion spring 312 can release and drive the limiting shaft 311 to rotate and reset, the reset limiting shaft 311 can drive the limiting plate 306 to turn and reset, the limiting plate 306 drives the limiting block 307 to be reinserted into the limiting groove 309 at the corresponding position, the position of the pressing rod 304 is limited, the user can conveniently adjust the height of the pressing rod 304 according to the requirement, so that the user can put the legs on the compression bar 304 for leg compression and warming before doing aerobics.

Further, a movable hole 310 is formed in the fixing strip 305, a limiting shaft 311 is rotatably mounted in the movable hole 310, the limiting shaft 311 is fixedly mounted on the limiting plate 306, a second torsion spring 312 is fixedly sleeved on the limiting shaft 311, one end of the second torsion spring 312 is fixedly mounted on the inner wall of the movable hole 310, the other end of the second torsion spring 312 is fixedly mounted on the limiting shaft 311, the rotating limiting plate 306 drives the limiting shaft 311 to rotate in the movable hole 310 on the fixing strip 305, the overturning effect is achieved, and the limiting shaft 311 rotates and compresses the second torsion spring 312.

Further, two limiting sliding grooves 313 are formed in the adjusting rod 303, limiting blocks 314 are slidably mounted in the two limiting sliding grooves 313, the two limiting blocks 314 are fixedly mounted on the inner walls of the two sides of the supporting rod 302 respectively, and the adjusting rod 303 can slide on the two limiting blocks 314 through the two limiting sliding grooves 313 respectively by pulling the adjusting rod 303, so that the moving direction of the adjusting rod 303 is limited.

Further, the upset limit structure includes slide bar 401, slide bar 401 slidable mounting is on stationary blade 400, stationary blade 400 fixed mounting is in one side of bracing piece 302, fixed mounting has stop collar piece 402 on the slide bar 401, stop collar piece 402 slidable mounting is in one side of bracing piece 302, two cover grooves 403 have been seted up on the stop collar piece 402, all movable mounting has first loop bar 404 in two cover grooves 403, two first loop bars 404 are all fixed mounting on connecting plate 300, fixed mounting has two second loop bars 405 on connecting plate 300, two second loop bars 405 respectively with two cover grooves 403 looks adaptation, the slide bar 401 of pulling both sides can drive stop collar piece 402 and remove, the stop collar piece 402 of removal can be through the cooperation extrusion spring 406 with stationary blade 400, can drive the cover groove 403 and break away from first loop bar 404 when the stop collar piece 402 removes, can be released the restriction to bracing piece 302 at this moment, can overturn the operation to the bracing piece 302, can drive the stop collar piece 302 and follow the removal when overturning, make stop collar piece 403 on the piece 403 and the corresponding loop bar 403 of second loop bar 405, can realize compressing the stop collar piece 402, can realize the reset angle to the stop collar piece is realized to the reset piece 401, can realize the reset sleeve piece 405.

Further, the sliding rod 401 is slidably sleeved with a spring 406, two ends of the spring 406 are respectively and fixedly installed on one side, close to each other, of the fixing piece 400 and the limiting sleeve block 402, the moving limiting sleeve block 402 can press the spring 406 through cooperation with the fixing piece 400, the sliding rod 401 is loosened, and the compressed spring 406 can release and push the limiting sleeve block 402 to reset.

The working principle of the utility model is as follows:

through turning the limiting plates 306 on two sides, the rotating limiting plates 306 drive the limiting shaft 311 to rotate in the movable hole 310 on the fixed bar 305, the turning effect is realized, the limiting shaft 311 rotates and compresses the second torsion spring 312, the continuously turned limiting plates 306 drive the limiting block 307 to separate from the limiting groove 309 on the limiting bar 308, so that the limitation of the adjusting rod 303 can be relieved, the adjusting rod 303 can slide on the two limiting blocks 314 respectively through the two limiting sliding grooves 313 by pulling the adjusting rod 303, the moving direction of the adjusting rod 303 is further limited, the adjusting rod 303 drives the pressing rod 304 to move when moving, the adjustment of the pressing rod 304 is realized, the compressed second torsion spring 312 releases and drives the limiting shaft 311 to rotate and reset at the moment after the adjustment, the reset limiting shaft 311 drives the limiting plate 306 to turn and reset, the limiting plate 306 drives the limiting block 307 to reinsert into the limiting groove 309 at the corresponding position, limits the position of the pressing rod 304, and is convenient for a user to adjust the height of the pressing rod 304 according to the requirement, so that the user can put legs on the pressing rod 304 to warm up the body before making an aerobics operation, the aerobics pad 203 is arranged to facilitate the user to make an aerobics operation on the aerobics pad 203, the sliding rods 401 on two sides are pulled to drive the limiting sleeve block 402 to move, the moving limiting sleeve block 402 presses the spring 406 through the cooperation with the fixing plate 400, the limiting sleeve block 402 moves and drives the sleeve groove 403 to separate from the first sleeve rod 404, at the moment, the limitation on the supporting rod 302 can be removed, the turning operation can be performed on the supporting rod 302, the supporting rod 302 is turned ninety degrees, the supporting rod 302 is turned and simultaneously drives the limiting sleeve block 402 to move along, so that the sleeve groove 403 on the limiting sleeve block 402 corresponds to the second sleeve rod 405, at this time, when the sliding rod 401 is loosened, the compressed spring 406 will release and push the stop collar block 402 to reset, the reset stop collar block 402 will drive the sleeve groove 403 to be sleeved on the second sleeve rod 405, the current angle of the supporting rod 302 is limited, the step of adjusting the supporting rod 302 is completed, at this time, the user can lie on the body building pad 203, the compression rod 304 can be pressed at the foot position of the user, so that the user can do sit up training, when the user is using up, the movable clamping plate 209 can rotate on the fixed shaft 208 through the rotating hole 211 and compress the first torsion spring 212, the continuously-turned movable clamping plate 209 can drive the clamping groove 210 to be separated from the handle 206, at this time, the handle 206 is pushed to drive the second gear 205 to rotate, the rotating second gear 205 can drive the connecting shaft 200 to rotate through the meshing with the first gear 204, the rotating connecting shaft 200 drives the winding roller 201, the rotating winding roller 201 can wind the body building pad 203, meanwhile, the angle of the supporting rod 302 is adjusted to be parallel to the recovery box 100, and the recovery box 304 is stored in a close to the recovery box 100, and the recovery space is reduced, thereby completing the recovery operation of the recovery box.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (8)

1. The utility model provides an aerobics multifunctional teaching exercise device, includes collection box (100), its characterized in that: the utility model discloses a recovery box, including recovery box (100), connecting axle (200) are installed in rotation on recovery box (100), install rolling structure on connecting axle (200), fixed mounting has two connecting plates (300) on recovery box (100), equal fixed mounting has pivot (301) on two connecting plates (300), installs same regulation bearing structure on two pivots (301), installs two stationary blades (400) on the regulation bearing structure, all installs upset limit structure on two stationary blades (400).

2. An aerobics multifunctional teaching and practicing device according to claim 1, characterized in that: the winding structure comprises a winding roller (201), the winding roller (201) is fixedly arranged on a connecting shaft (200), a movable groove (202) is formed in a recovery box (100), one end of a body building pad (203) is fixedly arranged on the winding roller (201), the other end of the body building pad (203) penetrates through the movable groove (202), a first gear (204) is fixedly arranged at one end of the connecting shaft (200), a second gear (205) is rotatably arranged at one side of the recovery box (100), the second gear (205) is meshed with the first gear (204), a handle (206) is rotatably arranged at one side of the second gear (205), two fixed blocks (207) are symmetrically arranged at one side of the recovery box (100), one side of the two fixed blocks (207) close to each other is fixedly provided with the same fixed shaft (208), a movable clamping plate (209) is rotatably arranged on the fixed shaft (208), a clamping groove (210) is formed in the movable clamping plate (209), and the handle (206) is movably arranged in the clamping groove (210).

3. An aerobics multifunctional teaching and practicing device as claimed in claim 2, characterized in that: the movable clamping plate (209) is provided with a rotating hole (211), the fixed shaft (208) is rotatably arranged in the rotating hole (211), the fixed shaft (208) is fixedly sleeved with a first torsion spring (212), one end of the first torsion spring (212) is fixedly arranged on the inner wall of the rotating hole (211), and the other end of the first torsion spring (212) is fixedly arranged on the fixed shaft (208).

4. An aerobics multifunctional teaching and practicing device according to claim 1, characterized in that: the adjusting support structure comprises two support rods (302), the two support rods (302) are respectively and rotatably arranged on the two rotating shafts (301), adjusting rods (303) are slidably arranged on the inner walls of the two support rods (302), one pressing rod (304) is fixedly arranged on the two adjusting rods (303), fixing strips (305) are fixedly arranged on one sides of the two adjusting rods (303), limiting plates (306) are rotatably arranged on the two fixing strips (305), limiting blocks (307) are fixedly arranged on two sides of the two limiting plates (306), two limiting strips (308) are fixedly arranged on the two support rods (302), a plurality of limiting grooves (309) are respectively formed in the four limiting strips (308), and the four limiting blocks (307) are movably arranged in the corresponding four limiting grooves (309).

5. The aerobics multifunctional teaching and practicing device as claimed in claim 4, wherein: the fixed strip (305) is provided with a movable hole (310), a limiting shaft (311) is rotatably installed in the movable hole (310), the limiting shaft (311) is fixedly installed on the limiting plate (306), a second torsion spring (312) is fixedly sleeved on the limiting shaft (311), one end of the second torsion spring (312) is fixedly installed on the inner wall of the movable hole (310), and the other end of the second torsion spring (312) is fixedly installed on the limiting shaft (311).

6. The aerobics multifunctional teaching and practicing device as claimed in claim 4, wherein: two limiting sliding grooves (313) are formed in the adjusting rod (303), limiting blocks (314) are slidably mounted in the two limiting sliding grooves (313), and the two limiting blocks (314) are fixedly mounted on the inner walls of the two sides of the supporting rod (302) respectively.

7. An aerobics multifunctional teaching and practicing device according to claim 1, characterized in that: the overturning limiting structure comprises a sliding rod (401), the sliding rod (401) is slidably mounted on a fixing plate (400), the fixing plate (400) is fixedly mounted on one side of a supporting rod (302), a limiting sleeve block (402) is fixedly mounted on the sliding rod (401), the limiting sleeve block (402) is slidably mounted on one side of the supporting rod (302), two sleeve grooves (403) are formed in the limiting sleeve block (402), a first sleeve rod (404) is movably mounted in the two sleeve grooves (403), the two first sleeve rods (404) are fixedly mounted on a connecting plate (300), two second sleeve rods (405) are fixedly mounted on the connecting plate (300), and the two second sleeve rods (405) are respectively matched with the two sleeve grooves (403).

8. The aerobics multifunctional teaching and practicing device as claimed in claim 7, wherein: the sliding rod (401) is sleeved with a spring (406) in a sliding mode, and two ends of the spring (406) are respectively and fixedly arranged on one side, close to each other, of the fixing piece (400) and the limiting sleeve block (402).