CN112807621A - Waist trainer for sports dancing - Google Patents
Waist trainer for sports dancing Download PDFInfo
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- CN112807621A CN112807621A CN202011607128.6A CN202011607128A CN112807621A CN 112807621 A CN112807621 A CN 112807621A CN 202011607128 A CN202011607128 A CN 202011607128A CN 112807621 A CN112807621 A CN 112807621A
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- 230000002860 competitive effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B23/00—Exercising apparatus specially adapted for particular parts of the body
- A63B23/02—Exercising apparatus specially adapted for particular parts of the body for the abdomen, the spinal column or the torso muscles related to shoulders (e.g. chest muscles)
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
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Abstract
本发明公开了一种体育舞蹈用腰部训练装置，属于舞蹈训练器材，包括第一弧形托板、第二弧形托板和辅助支撑板本发明包括辅助支撑板，可对训练者背部进行支撑，且辅助支撑板一端与第一托板转动连接，另一端与伸缩管相连，通过伸缩管的伸缩带动辅助支撑板绕着第一托板端部转动，从而帮助训练者逐步向后弯曲，进行腰部训练，且可根据具体情况，对辅助支撑板摆动的幅度进行调节，进行相应的腰部训练工作，其中，驱动组件与触发机构相连，通过拉动拉绳即可带动各个驱动块转动，从而带动定位组件的定位板的远离或贴合内杆，对伸缩管进行控制，训练者在训练时，可自身拉动拉绳进行控制，操作简单便捷。
The invention discloses a waist training device for sports dance, which belongs to dance training equipment and includes a first arc-shaped support plate, a second arc-shaped support plate and an auxiliary support plate. The invention includes an auxiliary support plate, which can support the back of a trainer. , and one end of the auxiliary support plate is rotatably connected with the first support plate, and the other end is connected with the telescopic tube. Waist training, and according to the specific situation, the swing amplitude of the auxiliary support plate can be adjusted to carry out the corresponding waist training work. The driving component is connected with the trigger mechanism, and each driving block can be driven to rotate by pulling the pull rope, thereby driving the positioning. The positioning plate of the component is far away from or attached to the inner rod to control the telescopic tube. During training, the trainer can pull the rope to control it, and the operation is simple and convenient.
Description
Technical Field
The invention relates to the technical field of dance training instruments, in particular to a waist training device for physical dance.
Background
Sports dancing is an emerging sports event in China, has the body building, exercising and competitive values of common sports events, has the artistic expression charm of dancing, and is a combination of sports and art. People can perform social activities, cultivate temperament and exercise bodies through sports dancing, the sports dancing belongs to typical skill performance hard and beautiful projects, the traditional sports dancing training mode is mainly to improve the skill level of a player, but with the increasingly intense competition of the competitive level of the international sports dancing of the current generation, the sports performance is not completely dependent on the skill level of the player, but depends on the comprehensive competitive skill force of the player;
the sportsman is through various training, improve the harmony of dance skill self health, wherein, lower waist training is exactly the compliance of training dancer's waist, the waist training under ordinary, drag the waist of training person through other people, thereby let the user carry out lower waist training, extravagant user and collaborator's physical power simultaneously in the training process, training efficiency has been reduced, so need replace the assistant training person of collaborator through the apparatus and carry out lower waist training, current lower waist trainer simple structure, unable supplementary training person carries out the waist training, lower waist is the ability that long-term exercise could be mastered, and be the gradual process of a circulation, to the beginner, unable one puts in place and carries out lower waist training, thereby cause the injury on the health easily, so the waist trainer for sports dances solves above-mentioned problem.
Disclosure of Invention
The invention provides a waist training device for sports dancing, which can be gradually circulated and can assist a trainer to gradually bend to perform waist training, and solves the problems that training instruments in the real technology are simple in structure, fixed in angle and incapable of assisting the trainer to gradually perform training.
In order to achieve the purpose, the invention provides the following technical scheme: a waist training device for physical dance comprises a first arc-shaped supporting plate, a second arc-shaped supporting plate and an auxiliary supporting plate, wherein one end of the first arc-shaped supporting plate is smoothly connected with one end of the second arc-shaped supporting plate, the auxiliary supporting plate is located above the second arc-shaped supporting plate, one end of the auxiliary supporting plate is rotatably connected with the joint of the first arc-shaped supporting plate and the second arc-shaped supporting plate, at least one vertical telescopic pipe is arranged at the other end of the auxiliary supporting plate, the telescopic pipe comprises an outer pipe and an inner rod which is coaxially connected with the outer pipe, the top end of the inner rod is rotatably connected with the auxiliary supporting plate, the inner rod moves up and down along the axial direction of the outer pipe, and the auxiliary supporting plate is controlled to rotate around the joint;
the limiting mechanism is arranged in the outer tube and used for controlling the inner rod to move, the limiting mechanism comprises a positioning component and a driving component which are positioned in the telescopic tube, and the driving component is connected with the positioning component and used for driving the positioning component to be in contact with the inner rod for locking or separating for unlocking;
and at least one part of the first arc-shaped supporting plate is provided with a trigger mechanism, and the trigger mechanism is connected with the driving assembly and used for starting the driving assembly.
Preferably, locating component is including being located inside and the symmetric distribution of outer tube is in a plurality of locating plate in the interior pole outside, the locating plate is close to interior pole one side is covered with the lug, stretch into on the interior pole the outer tube part is densely covered with the recess, the lug with the recess joint, the locating plate with drive assembly links to each other, and drive assembly controls each the locating plate is along outer tube radial movement, drives the locating plate is kept away from or is laminated interior pole.
Preferably, the top end of the positioning plate is connected with the outer tube, the bottom end of the positioning plate is connected with the driving assembly, and the driving assembly drives the positioning plates to swing so that the positioning plates are far away from or attached to the inner rod.
Preferably, the quantity of locating plate is two, and each the locating plate is close to outer tube inner wall one side and has evenly laid a plurality of third reset spring, the third reset spring other end with the outer tube inner wall links to each other, drive assembly is including the oval drive block that is located between two locating plates, the drive block center is connected with the drive shaft, the drive shaft with trigger mechanism links to each other, and trigger mechanism drives the drive shaft rotates, drives in step the drive block is two rotate between the locating plate, with the locating plate contact, the extrusion the locating plate compression the swing of third reset spring, or with the locating plate separation, third reset spring drives the locating plate resets.
Preferably, the number of the telescopic pipes is two, the telescopic pipes are symmetrically distributed on two sides of the end part of the auxiliary supporting plate, and the two driving blocks in the telescopic pipes are connected through one driving shaft.
Preferably, the trigger mechanism comprises at least one first rotating wheel and a pull rope, the first rotating wheel is installed on the side edge of the first arc-shaped supporting plate, the second rotating wheel is sleeved in the middle of the driving shaft, the pull rope is sequentially connected with the first rotating wheel and the second rotating wheel, and the pull rope pulls the first rotating wheel and the second rotating wheel to synchronously rotate and drive the driving shaft and each driving block to rotate.
Preferably, the bracing piece is all installed at first arc layer board and second arc layer board junction both ends, two install the pivot between the bracing piece, first auxiliary wheel has all been cup jointed with each first runner department in the pivot, the second auxiliary wheel has been cup jointed at the pivot middle part, installs the linkage belt between second auxiliary wheel and the second runner, first runner and auxiliary wheel are connected in proper order to the stay cord, and the stay cord pulling drives first runner, first auxiliary wheel and the synchronous rotation of pivot, and the pivot is rotated and is driven second auxiliary wheel and the synchronous rotation of second runner.
Preferably, a first return spring is arranged between the bottom end of the inner rod and the bottom of the outer tube.
Preferably, the auxiliary support plate comprises a plurality of sub-plates which are sequentially and rotatably connected, one end of one sub-plate is provided with a sliding chute, a fixed plate is slidably mounted in the sliding chute, a slot is formed in the position, corresponding to the fixed plate of the adjacent sub-plate, of the other end of the sub-plate, the fixed plate is slidably inserted into or separated from the corresponding slot, and the two sub-plates are fixedly connected or rotatably connected;
the fixed plate is kept away from spout notch one end and is installed second reset spring, and the second reset spring other end is adjacent with the spout inner wall, under the second reset spring natural state, drive the fixed plate stretches out the spout, and it is adjacent to insert in the slot of daughter board, each the daughter board has seted up the elongated slot near second arc layer board one side, elongated slot intercommunication spout, the fixed plate corresponds position department with first trigger slot and has seted up the chute, correspond position department with each elongated slot on the second arc layer board and all install the wedge, the daughter board with when second arc layer board laminating, the wedge inserts in proper order and corresponds in elongated slot and the chute, drive fixed plate compression second reset spring removes.
Preferably, a pedal plate is installed at the other end of the first arc-shaped supporting plate, and at least one elastic binding belt is installed on the pedal plate.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention comprises an auxiliary support plate which can support the back of a trainer, one end of the auxiliary support plate is rotatably connected with a first support plate, the other end of the auxiliary support plate is connected with a telescopic pipe, the auxiliary support plate is driven to rotate around the end part of the first support plate by the expansion and contraction of the telescopic pipe so as to help the trainer gradually bend backwards and train the waist, and the height of the telescopic pipe can be adjusted according to specific conditions so as to adjust the swing amplitude of the auxiliary support plate and carry out corresponding waist training work, the invention also comprises a limit mechanism, a positioning component is driven to be contacted with or separated from an inner rod by a driving component, so that the downward movement of the telescopic pipe can be controlled, wherein the driving component is connected with a trigger mechanism, each driving block can be driven to rotate by pulling a pull rope so as to drive a positioning plate of the positioning component to be far away from, the pull rope can be pulled by the user to be controlled, and the operation is simple and convenient.
2. According to the auxiliary supporting plate, the auxiliary supporting plate comprises a plurality of sub-plates which are sequentially and rotatably connected, wedge-shaped blocks uniformly distributed on the second arc-shaped supporting plate are inserted into the long grooves and the chutes between the corresponding adjacent sub-plates one by one along with the rotation of the auxiliary supporting plate, the fixing plate is pushed to move and is separated from the slots, so that the fixed connection between the two adjacent sub-plates is released, the two adjacent sub-plates can rotate, and the sub-plates can be better attached to the upper part of the second arc-shaped supporting plate along with the rotation of the sub-plates, wherein each parallel sub-plate can be used for carrying out auxiliary supporting on a trainer, each bent sub-plate can be well attached to the second arc-shaped supporting plate to form an arc-shaped surface, the trainer.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic diagram of the construction of an exercise apparatus of the present invention;
FIG. 2 is a front view of the exercise apparatus of the present invention;
FIG. 3 is a schematic structural view of the spacing mechanism of the present invention;
FIG. 4 is a schematic structural view of the trigger mechanism of the present invention;
FIG. 5 is a schematic view of the construction of the accessory support plate of the present invention;
FIG. 6 is a schematic diagram of the structure of the daughter board of the present invention;
FIG. 7 is a schematic view of the internal structure of the daughter board of the present invention;
reference numbers in the figures: 1. a first arc-shaped supporting plate; 2. a second arc-shaped supporting plate; 3. an auxiliary support plate; 31. a daughter board; 32. a chute; 33. a fixing plate; 34. a slot; 35. a second return spring; 36. a long groove; 37. a chute; 4. a telescopic pipe; 41. an outer tube; 42. an inner rod; 5. a positioning assembly; 51. positioning a plate; 52. a bump; 53. a third return spring; 6. a drive assembly; 61. a drive block; 62. a drive shaft; 7. a trigger mechanism; 71. a first runner; 72. pulling a rope; 73. a second runner; 74. a support bar; 75. a rotating shaft; 76. a first auxiliary wheel; 77. a second auxiliary wheel; 78. a linkage belt; 8. a groove; 9. a wedge block; 10. a foot pedal; 11. a binding belt.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in fig. 1-2, a waist training device for physical education dancing comprises a first arc-shaped supporting plate 1, a second arc-shaped supporting plate 2 and an auxiliary supporting plate 3, wherein one end of the first arc-shaped supporting plate 1 is smoothly connected with one end of the second arc-shaped supporting plate 2, the auxiliary supporting plate 3 is positioned above the second arc-shaped supporting plate 2, one end of the auxiliary supporting plate 3 is rotatably connected with the joint of the first arc-shaped supporting plate 1 and the second arc-shaped supporting plate 2, at least one vertical telescopic tube 4 is arranged at the other end of the auxiliary supporting plate 3, the telescopic tube 4 comprises an outer tube 41 and an inner rod 42 coaxially connected with the outer tube 41, the top end of the inner rod 42 is rotatably connected with the auxiliary supporting plate 3, the inner rod 42 moves up and down along the axial direction of the outer tube 41;
wherein, install the stop gear who is used for controlling interior pole 42 removal in outer pipe 41, stop gear includes a locating component 5 and a drive assembly 6 that are located flexible pipe 4, drive assembly 6 links to each other with locating component 5 for drive locating component 5 and interior pole 42 contact locking or separation unblock, installs trigger mechanism 7 in at least one department on first arc layer board 1, trigger mechanism 7 links to each other with drive assembly 6, is used for starting drive assembly 6.
As shown in fig. 3, the positioning assembly 5 includes a plurality of positioning plates 51 located inside the outer tube 41 and symmetrically distributed outside the inner rod 42, a protrusion 52 is distributed on one surface of the positioning plate 51 close to the inner rod 42, grooves 8 are densely distributed on the portion of the inner rod 42 extending into the outer tube 41, the protrusion 52 is connected with the grooves 8 in a clamping manner, the positioning plate 51 is connected with the driving assembly 6, the driving assembly 6 controls each positioning plate 51 to move radially along the outer tube 41 to drive the positioning plate 51 to be away from or attached to the inner rod 42, wherein in this embodiment, the top end of the positioning plate 51 is connected with the outer tube 41, the bottom end of the positioning plate is connected with the driving assembly 6, the driving assembly 6 drives each positioning
As shown in fig. 3, the number of the positioning plates 51 is two, and a plurality of third return springs 53 are uniformly distributed on one surface of each positioning plate 51 close to the inner wall of the outer tube 41, the other end of each third return spring 53 is connected with the inner wall of the outer tube 41, the driving assembly 6 comprises an elliptical driving block 61 located between the two positioning plates 51, a driving shaft 62 is connected to the center of the driving block 61, the driving shaft 62 is connected with the trigger mechanism 7, the trigger mechanism 7 drives the driving shaft 62 to rotate, and synchronously drives the driving block 61 to rotate between the two positioning plates 51, wherein as the elliptical driving block 61 rotates, the major axis part of the elliptical driving block is in contact with the positioning plate 51, the pressing positioning plate 51 compresses the third return spring 53 to swing, or the minor axis part of the pressing plate 51 is separated from the.
As shown in fig. 1 and 3, in order to better support the auxiliary support plate 3, the number of the telescopic pipes 4 is two, and the telescopic pipes are symmetrically distributed on two sides of the end portion of the auxiliary support plate 3, wherein the driving blocks 61 in the two telescopic pipes 4 are connected through one driving shaft 62, and the triggering mechanism 7 includes at least one first rotating wheel 71 and one pulling rope 72, in this embodiment, the number of the first rotating wheel 71 and the pulling rope 72 is two, and the first rotating wheel is symmetrically distributed on two sides of the first arc-shaped support plate 1, so that a trainer can conveniently pull according to needs, the first rotating wheel 71 is installed on one side of the first arc-shaped support plate 1, the middle portion of the driving shaft 62 is sleeved with a second rotating wheel 73, the pulling rope 72 is sequentially connected with the first rotating wheel 71 and the second rotating wheel 73, and the pulling rope 72 pulls the first rotating wheel 71 and the second rotating wheel 73 to.
As shown in fig. 3-4, two ends of the joint of the first arc supporting plate 1 and the second arc supporting plate 2 are respectively provided with a supporting rod 74, the joint of the first arc-shaped supporting plate 1 and the second arc-shaped supporting plate 2 is supported, the safety and the stability of the device are improved, a rotating shaft 75 is arranged between the two supporting rods 74, a first auxiliary wheel 76 is sleeved at the positions of the rotating shaft 75 and each first rotating wheel 71, a second auxiliary wheel 77 is sleeved at the middle part of the rotating shaft 75, a linkage belt 78 is arranged between the second auxiliary wheel 77 and the second rotating wheel 73, as shown in fig. 4, a pulling rope 72 is arranged, the pulling rope 72 is connected with the first rotating wheel 71 and the auxiliary wheel in sequence, the pulling rope 72 drives the first rotating wheel 71, the first auxiliary wheel 76 and the rotating shaft 75 to rotate synchronously, the rotating shaft 75 drives the second auxiliary wheel 77 and the second rotating wheel 73 to rotate synchronously, wherein, a handle can be arranged at the end part of the pulling rope 72 for facilitating the pulling of the trainer.
After training, the trainer can pull the inner rod 42 to restore the inner rod, or the first return spring is arranged between the bottom end of the inner rod 42 and the bottom of the outer tube 41, after the trainer gets up, the positioning plate 51 is separated from the inner rod 42 by pulling the pull rope 72, and the inner rod 42 can automatically move upwards under the driving of the first return spring to restore the inner rod.
As shown in fig. 5-7, the auxiliary supporting plate 3 includes a plurality of sub-plates 31 rotatably connected in sequence, one end of one sub-plate 31 is provided with a sliding slot 32, a fixing plate 33 is slidably installed in the sliding slot 32, the other end of the other sub-plate is provided with a slot 34 corresponding to the fixing plate 33 of the adjacent sub-plate 31, the fixing plate 33 slides to be inserted into or separated from the corresponding slot 34, and the two sub-plates 31 are fixedly connected or rotatably connected, one end of the fixing plate 33 far away from the opening of the sliding slot 32 is provided with a second return spring 35, the other end of the second return spring 35 is adjacent to the inner wall of the sliding slot 32, the second return spring 35 drives the fixing plate 33 to extend out of the sliding slot 32 and be inserted into the slot 34 of the adjacent sub-plate 31 in a natural state, one side of each sub-plate 31 near the second arc, the wedge-shaped blocks 9 are mounted at positions, corresponding to the long grooves 36, on the second arc-shaped supporting plate 2, and when the sub-plate 31 is attached to the second arc-shaped supporting plate 2, the wedge-shaped blocks 9 are sequentially inserted into the corresponding long grooves 36 and the inclined grooves 37, so that the fixing plate 33 is driven to compress the second return spring 35 to move.
When in use, as shown in fig. 1, a pedal plate 10 is installed at the other end of the first arc-shaped supporting plate 1, at least one elastic binding belt 11 is installed on the pedal plate 10, a trainer steps on the pedal plate 10 and feels comfortable to the instep through the elastic binding belt 11, wherein, anti-slip patterns can be arranged on the pedal plate 10 to increase friction force and avoid the trainer slipping at the bottom of the foot during training, after the steps are fixed, the waist of the trainer is bent and leans against the first arc-shaped supporting plate 1 and the auxiliary supporting plate 3, one or two pull ropes 72 are held by hands to pull the pull ropes 72, the pull ropes 72 drive the first rotating wheel 71, the first auxiliary wheel 76 and the rotating shaft 75 to synchronously rotate, the rotating shaft 75 drives the second auxiliary wheel 77 and the second rotating wheel 73 to synchronously rotate, thereby driving the driving shaft 62 to rotate, the driving shaft 62 drives the elliptical driving blocks 61 at the two ends to rotate, when the long axis of the driving block 61 rotates to one, the positioning plate 51 is pushed to compress the third return spring 53 to swing, so that the positioning plate 51 is separated from the inner rod 42, the bump 52 is separated from the groove 8, the auxiliary supporting plate 3 is driven to rotate along with downward bending of a trainer, the inner rod 42 is pushed to move downwards, meanwhile, as the auxiliary supporting plate 3 approaches the second arc-shaped supporting plate 2, the first wedge-shaped block 9 on the second arc-shaped supporting plate 2 is inserted into the corresponding long groove 36 and the inclined groove 37, the fixing block is driven to compress the second return spring 35 to move, the fixing block is separated from the slot 34 of the second sub-plate 31, under the action of pressure, the second sub-plate 31 rotates around the first sub-plate 31, the first sub-plate 31 is attached to the second arc-shaped supporting plate 2, so as to imitate that, as the inner rod 42 continuously moves downwards, the sub-plates 31 are attached to the second arc-shaped supporting plate 2 one by one, the stretching is loosened, the driving block 61 is pushed to rotate and reset under the driving of the third reset spring 53, the positioning plate 51 is reset to be attached to the inner rod 42, the convex block 52 is clamped with the groove 8, the position of the inner rod 42 is locked, the position of the auxiliary supporting plate 3 is fixed, when the bending angle needs to be increased, the pull rope 72 is pulled again, and the operation is simple and flexible.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011607128.6A CN112807621B (en) | 2020-12-30 | 2020-12-30 | Waist trainer for sports dancing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011607128.6A CN112807621B (en) | 2020-12-30 | 2020-12-30 | Waist trainer for sports dancing |
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| Publication Number | Publication Date |
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| CN112807621A true CN112807621A (en) | 2021-05-18 |
| CN112807621B CN112807621B (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011607128.6A Expired - Fee Related CN112807621B (en) | 2020-12-30 | 2020-12-30 | Waist trainer for sports dancing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113599185A (en) * | 2021-08-10 | 2021-11-05 | 吉林大学 | Be used for parturient pelvic floor muscle tightening means |
| CN115300859A (en) * | 2022-08-09 | 2022-11-08 | 郑州大学体育学院 | Auxiliary training device and method for training waist flexibility and abdomen strength |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113599185A (en) * | 2021-08-10 | 2021-11-05 | 吉林大学 | Be used for parturient pelvic floor muscle tightening means |
| CN113599185B (en) * | 2021-08-10 | 2022-04-29 | 吉林大学 | Be used for parturient pelvic floor muscle tightening means |
| CN115300859A (en) * | 2022-08-09 | 2022-11-08 | 郑州大学体育学院 | Auxiliary training device and method for training waist flexibility and abdomen strength |
| CN115300859B (en) * | 2022-08-09 | 2023-04-28 | 郑州大学体育学院 | Auxiliary training device and method for training waist flexibility and abdomen strength |
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| CN112807621B (en) | 2021-11-19 |
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