Swimming auxiliary device

Abstract

The invention discloses a swimming auxiliary device, which relates to the technical field of swimming auxiliary appliances, and comprises a first buoyancy structure, a second buoyancy structure, a first connecting rod, a second connecting rod, a first shoulder strap and a second shoulder strap, one end of the first connecting rod and one end of the second connecting rod are both connected with the first buoyancy structure in a sliding mode and can be detached, and the other end of the first connecting rod and the other end of the second connecting rod are both connected with the second buoyancy structure in a sliding mode and can be detached. The first connecting rod and the second connecting rod can get away from each other or get close to each other, the first shoulder strap and the first connecting rod are connected in a sliding mode and can be detached, and the second shoulder strap and the second connecting rod are connected in a sliding mode and can be detached. The swimming training device can assist users of different body types in carrying out different types of swimming training and is convenient to store.

Description

Technical Field

[0001] The present invention relates to the technical field of swimming aids, and particularly to a swimming assistance device. Background Art

[0002] Swimming rings are used to assist in learning swimming. By putting the swimming ring around the waist, the buoyancy generated by the swimming ring in water can assist people in swimming. Existing swimming rings are set in different sizes, and different-sized swimming rings are selected according to the body shape of the user, lacking universal adaptability. Moreover, when wearing a swimming ring, it is set under the armpits or around the waist of the human body. When a user wears a swimming ring, they can only paddle and cannot perform other types of swimming.

[0003] In addition, some other swimming aids take up a large amount of space when being stored and are not convenient to carry. Summary of the Invention

[0004] The purpose of the present invention is to provide a swimming assistance device to solve the problems existing in the above-mentioned prior art, which can assist users of different body types in different types of swimming training and is convenient for storage.

[0005] To achieve the above object, the present invention provides the following solution:

[0006] The present invention provides a swimming assistance device, including: a first buoyancy structure, a second buoyancy structure, a first connecting rod, a second connecting rod, a first shoulder strap, and a second shoulder strap. Both the first connecting rod and the second connecting rod can be telescoped. One end of the first connecting rod and one end of the second connecting rod are both slidably connected to the first buoyancy structure and can be detached. The other end of the first connecting rod and the other end of the second connecting rod are both slidably connected to the second buoyancy structure and can be detached. The first connecting rod and the second connecting rod can move away from or close to each other. The first shoulder strap is slidably connected to the first connecting rod and can be detached. The second shoulder strap is slidably connected to the second connecting rod and can be detached.

[0007] In some specific embodiments, two first transverse chutes are provided on the first buoyancy structure, and a first locking structure is provided in each of the first transverse chutes. The first connecting rod can lock the position of the first connecting rod in the first transverse chute and lock the position of the first locking structure on the first connecting rod through one of the first locking structures. The second connecting rod can lock the position of the second connecting rod in the other first transverse chute and lock the position of the other first locking structure on the second connecting rod through the other first locking structure. Two second transverse chutes are provided on the second buoyancy structure, and a second locking structure is provided in each of the second transverse chutes. The first connecting rod can lock the position of the first connecting rod in the second transverse chute and lock the position of the second locking structure on the first connecting rod through one of the second locking structures. The second connecting rod can lock the position of the second connecting rod in the other second transverse chute and lock the position of the other second locking structure on the second connecting rod through the other second locking structure.

[0008] In some specific embodiments, the first locking structure and the second locking structure have the same structure. The first locking structure and the second locking structure each include a fastening collar, a screw rod, and a locking nut. The screw rod is provided on the outer part of the fastening collar, and the screw rod is threadedly connected to the locking nut. The first connecting rod or the second connecting rod extends into the fastening collar, and the screw rod is located in the first transverse chute or the second transverse chute.

[0009] In some specific embodiments, both the first connecting rod and the second connecting rod are located on one side of the first buoyancy structure, and the locking nut is located on the other side of the first buoyancy structure. The first connecting rod, the second connecting rod, and the locking nut clamp the first buoyancy structure. Both the first connecting rod and the second connecting rod are located on one side of the second buoyancy structure, and the locking nut is located on the other side of the second buoyancy structure. The first connecting rod, the second connecting rod, and the locking nut clamp the second buoyancy structure.

[0010] In some specific embodiments, a first connecting plate is provided on the first buoyancy structure. A number of first connection holes for the first connecting rod to pass through and a number of second connection holes for the second connecting rod to pass through are provided on the first connecting plate. A second connecting plate is provided on the second buoyancy structure. A number of third connection holes for the first connecting rod to pass through and a number of fourth connection holes for the second connecting rod to pass through are provided on the second connecting plate. The first connecting rod passes through the first connection hole and the third connection hole and is connected through a first limit nut. The second connecting rod passes through the second connection hole and the fourth connection hole and is connected through a second limit nut.

[0011] In some specific embodiments, the first buoyancy structure is a buoyancy board, a buoyancy rod or an inflatable structure; the second buoyancy structure is a buoyancy board, a buoyancy rod or an inflatable structure.

[0012] In some specific embodiments, by adjusting the first connecting rod and the second connecting rod, the first buoyancy structure and the second buoyancy structure can form an annular structure.

[0013] In some specific embodiments, a water paddling structure is hinged at one end of the first connecting rod and one end of the second connecting rod, and the two water paddling structures are respectively located on both sides of the first buoyancy structure; shoulder baffles are arranged on both the first connecting rod and the second connecting rod.

[0014] In some specific embodiments, the water paddling structure is connected to the first connecting rod or the second connecting rod through a universal hinge structure. The water paddling structure includes a water paddling rod and a paddle. The water paddling rod can be telescopic. One end of the water paddling rod is rotatably connected to the universal hinge structure, and the paddle is arranged at the other end of the water paddling rod.

[0015] In some specific embodiments, the water paddling structure further includes a footrest. One end of the footrest is connected to a pull rope. The pull rope is arranged on a wire reel, and the wire reel is arranged on the water paddling rod.

[0016] The present invention has achieved the following technical effects compared with the prior art:

[0017] When the swimming assistance device of the present invention is in use, the first shoulder strap and the second shoulder strap are respectively arranged on the two shoulders of the user. The distance between the first connecting rod and the second connecting rod is used for the user's head to pass through during swimming. The user's arms and body are not restricted, and different types of swimming training can be carried out; by adjusting the lengths of the first connecting rod and the second connecting rod, and sliding the positions of the first buoyancy structure and the second buoyancy structure on the first connecting rod and the second connecting rod, the distance between the first buoyancy structure and the second buoyancy structure can be adjusted. Also, by moving the first connecting rod and the second connecting rod away from or close to each other, the swimming assistance device of the present invention can meet the needs of users of different heights. When not in use, the first connecting rod and the second connecting rod can be retracted to the shortest, and moved to the position where the distance between the first buoyancy structure and the second buoyancy structure is the smallest, so as to save space and facilitate storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Top view of the swimming assistance device in some embodiments of the present invention (Example 1);

[0020] Figure 2 Cross-sectional view of the swimming assistance device in some embodiments of the present invention (Example 1);

[0021] Figure 3 Top view of the swimming assistance device in some embodiments of the present invention (Example 2);

[0022] Figure 4 Top view of the swimming assistance device in some embodiments of the present invention (Example 3);

[0023] Figure 5 Schematic diagram of the swimming assistance device in some embodiments of the present invention (Example 4);

[0024] Figure 6 Top view of the swimming assistance device in some embodiments of the present invention (Example 5);

[0025] Figure 7 Top view of the swimming assistance device in some embodiments of the present invention (Example 7);

[0026] Figure 8 Cross-sectional view of the swimming assistance device in some embodiments of the present invention (Example 7);

[0027] In the figure: 1. First buoyancy structure, 1-1. First transverse chute, 1-2. First connecting plate, 2. Tightening collar, 2-1. Locking nut, 2-2. First limiting nut, 2-3. Second limiting nut, 3. First connecting rod, 4. First shoulder strap, 5-1. First sliding fixing block, 5-2. Second sliding fixing block, 6. Second buoyancy structure, 6-1. Second transverse chute, 6-2. Second connecting plate, 7. Universal hinge structure, 8. Rotary joint, 9. Paddling rod, 10. Reel, 11. Blade, 12. Tensile rope, 13. Footrest, 14. Shoulder baffle. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] The object of the present invention is to provide a swimming assistance device to solve the problems existing in the above-mentioned prior art, which can assist users of different body types in different types of swimming training and is convenient for storage.

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Embodiment 1

[0032] As Figures 1 to 2 shown, Embodiment 1 of the present invention provides a swimming assistance device, including: a first buoyancy structure 1, a second buoyancy structure 6, a first connecting rod 3, a second connecting rod, a first shoulder strap 4, and a second shoulder strap. The first buoyancy structure 1 and the second buoyancy structure 6 are located in the same plane. Both the first connecting rod 3 and the second connecting rod can be telescoped. One end of the first connecting rod 3 and one end of the second connecting rod are both slidably connected to the first buoyancy structure 1 and can be detached. The other end of the first connecting rod 3 and the other end of the second connecting rod are both slidably connected to the second buoyancy structure 6 and can be detached. The first connecting rod 3 and the second connecting rod can move away from each other or close to each other. The space between the first connecting rod 3 and the second connecting rod is for the head to pass through. The first shoulder strap 4 is slidably connected to the first connecting rod 3 and can be detached. The second shoulder strap is slidably connected to the second connecting rod and can be detached. In this embodiment, the first connecting rod 3 and the second connecting rod can be telescoped, and the first connecting rod 3 and the second connecting rod can move away from each other or close to each other. By adjusting the lengths of the first connecting rod 3 and the second connecting rod, and sliding the positions of the first buoyancy structure 1 and the second buoyancy structure 6 on the first connecting rod 3 and the second connecting rod, the distance between the first buoyancy structure and the second buoyancy structure can be adjusted to meet the needs of users of different heights and body types. After the first connecting rod 3 and the second connecting rod are extended, the first shoulder strap 4 and the second shoulder strap are respectively put on the shoulders of the human body. The person floats on the water surface, and the arms and body are not restricted and can swim freely by paddling, and different types of swimming training can be carried out; if the first connecting rod 3 and the second connecting rod are contracted to the shortest, and the first buoyancy structure 1 and the second buoyancy structure 6 are moved closest to each other, the whole device occupies a small space and is convenient for storage.

[0033] In some specific embodiments, such as Embodiment 1, the first buoyancy structure 1 is a buoyancy board; the second buoyancy structure 6 is a buoyancy board; the first buoyancy structure 1 and the second buoyancy structure 6 are located in the same plane. When the first connecting rod 3 and the second connecting rod are contracted to the shortest and slide to the top of the first buoyancy structure 1 and the second buoyancy structure 6, the swimming assistance device occupies a small space and is convenient for carrying. It can be carried on the back on the road through the first shoulder strap 4 and the second shoulder strap, or can be carried by hand on the road.

[0034] In some specific embodiments, such as Embodiment 1, the length dimensions of the first connecting rod 3 and the second connecting rod can be set according to requirements. After the first connecting rod 3 and the second connecting rod are extended, the distance between the first buoyancy structure 1 and the second buoyancy structure 6 becomes larger, providing sufficient spatial distance so that the head can freely dive into the water or lift out of the water during swimming movements for ventilation training.

[0035] In some specific embodiments, such as Embodiment 1, two symmetrically distributed first transverse chutes 1-1 are provided on the first buoyancy structure 1. A first locking structure is arranged in the first transverse chute 1-1. The first connecting rod 3 can lock the position of the first connecting rod 3 in the first transverse chute 1-1 and lock the position of the first locking structure on the first connecting rod 3 through one first locking structure. The second connecting rod can lock the position of the second connecting rod in another first transverse chute 1-1 and lock the position of another first locking structure on the second connecting rod through another first locking structure; two symmetrically distributed second transverse chutes 6-1 are provided on the second buoyancy structure 6. A second locking structure is arranged in the second transverse chute 6-1. The first connecting rod 3 can lock the position of the first connecting rod 3 in the second transverse chute 6-1 and lock the position of the second locking structure on the first connecting rod 3 through one second locking structure. The second connecting rod can lock the position of the second connecting rod in another second transverse chute 6-1 and lock the position of the second locking structure on the second connecting rod through another second locking structure. Thus, the distance between the first connecting rod 3 and the second connecting rod, and the distance between the first buoyancy structure and the second buoyancy structure can be adjusted to meet the needs of users of different heights.

[0036] In some specific embodiments, such as Embodiment 1, the first locking structure and the second locking structure have the same structure. The first locking structure and the second locking structure both include a fastening collar 2, a screw rod and a locking nut 2-1. A screw rod is arranged outside the fastening collar 2. The screw rod is threadedly connected with the locking nut 2-1. The first connecting rod 3 or the second connecting rod extends into the fastening collar 2, and the screw rod is located in the first transverse chute 1-1 or the second transverse chute 6-1. By moving the length of the first connecting rod 3 or the second connecting rod extending into the fastening collar 2, the distance between the first buoyancy structure 1 and the second buoyancy structure 6 can be adjusted. By moving the position of the screw rod in the first transverse chute 1-1 or the second transverse chute 6-1, the distance between the first connecting rod 3 or the second connecting rod can be adjusted.

[0037] In some specific embodiments, such as Embodiment 1, the first connecting rod 3 and the second connecting rod are both located on one side of the first buoyancy structure 1, and the locking nut 2-1 of the first locking structure is located on the other side of the first buoyancy structure 1. By rotating the locking nut 2-1, under the traction of the screw rod, the fastening collar 2 is tightly pressed and fixed on the first connecting rod 3, and at the same time, the first connecting rod 3 is also tightly pressed and fixed on the first buoyancy structure 1. Similarly, by rotating the locking nut 2-1, the fastening collar 2 is tightly pressed and fixed on the second connecting rod and the first buoyancy structure 1. The first connecting rod 3 and the second connecting rod are both located on one side of the second buoyancy structure 6, and the locking nut 2-1 of the second locking structure is located on the other side of the second buoyancy structure 6. By rotating the locking nut 2-1, under the traction of the screw rod, the fastening collar 2 is tightly pressed and fixed on the first connecting rod 3, and at the same time, the first connecting rod 3 is also tightly pressed and fixed on the second buoyancy structure 6. Similarly, by rotating the locking nut 2-1, under the traction of the screw rod, the fastening collar 2 is tightly pressed and fixed on the second connecting rod and the second buoyancy structure 6.

[0038] In some specific embodiments, such as Embodiment 1, the first connecting rod 3 and the second connecting rod can be arranged in parallel; alternatively, the first connecting rod 3 and the second connecting rod connected to the first buoyancy structure 1 can be separated, and the first connecting rod 3 and the second connecting rod connected to the second buoyancy structure 6 can be brought closer, with the first connecting rod 3 and the second connecting rod forming a V shape to facilitate the insertion of a person's head and be suitable for people with different shoulder widths to wear.

[0039] In some specific embodiments, such as Embodiment 1, the first shoulder strap 4 is respectively connected to the first connecting rod 3 through the first sliding fixing block 5-1 and the second sliding fixing block 5-2. Both the first sliding fixing block 5-1 and the second sliding fixing block 5-2 are slidably connected to the first connecting rod 3. By adjusting the distance between the first sliding fixing block 5-1 and the second sliding fixing block 5-2 and by adjusting the connection length between the first shoulder strap 4 and the first sliding fixing block 5-1 respectively, it can adapt to the height and body shape of different users; the second shoulder strap is respectively connected to the second connecting rod through the third sliding fixing block and the fourth sliding fixing block. Both the third sliding fixing block and the fourth sliding fixing block are slidably connected to the second connecting rod. By adjusting the distance between the third sliding fixing block and the fourth sliding fixing block and by adjusting the connection length between the second shoulder strap and the third sliding fixing block respectively, it can adapt to the height and body shape of different users.

[0040] When the swimming assistance device of this embodiment is in use, the first shoulder strap 4 and the second shoulder strap are respectively arranged on the two shoulders of the user and bypass the armpits. The distance between the first connecting rod 3 and the second connecting rod is for the human head to pass through when swimming. The user's arms and body are not restricted, and different types of swimming training can be carried out. By adjusting the lengths of the first connecting rod 3 and the second connecting rod, and sliding the positions of the first buoyancy structure 1 and the second buoyancy structure 6 on the first connecting rod 3 and the second connecting rod, the distance between the first buoyancy structure and the second buoyancy structure can be adjusted. Adjusting the lateral positions of the first connecting rod 3 and the second connecting rod on the first buoyancy structure 1 and the second buoyancy structure 6 can adjust the distance between the first buoyancy structure 1 and the second buoyancy structure 6. By moving the first connecting rod 3 and the second connecting rod away from or close to each other, and adjusting the width distance between the first connecting rod 3 and the second connecting rod, the swimming assistance device of this embodiment can meet the needs of different users. When not in use, the first connecting rod 3 and the second connecting rod can be contracted to the shortest length, saving space and facilitating storage.

[0041] Embodiment 2

[0042] As Figure 3 shown, the difference between this embodiment and Embodiment 1 is that: in this embodiment, the first buoyancy structure 1 is a cylindrical buoyancy rod; the second buoyancy structure 6 is a cylindrical buoyancy rod.

[0043] Embodiment 3

[0044] As Figure 4 shown, the difference between this embodiment and Embodiment 2 is that: in this embodiment, the first buoyancy structure 1 is a semi-circular ring-shaped buoyancy rod; the second buoyancy structure 6 is a semi-circular ring-shaped buoyancy rod; when the first connecting rod 3 and the second connecting rod are both adjusted to a certain length, the first buoyancy structure 1 and the second buoyancy structure 6 can form a ring structure. At this time, the first buoyancy structure 1 and the second buoyancy structure 6 can be connected through a connecting structure. When connected into a whole, the first buoyancy structure 1 and the second buoyancy structure 6 can be regarded as forming a ring-shaped swimming ring. The first buoyancy structure 1 and the second buoyancy structure 6 form a ring-shaped swimming ring, and the first connecting rod 3 and the second connecting rod are connected thereto.

[0045] Embodiment 4

[0046] As Figure 5 shown, the difference between this embodiment and Embodiment 2 is that: in this embodiment, a first connecting plate 1-2 is provided on the first buoyancy structure 1, and a number of first connecting holes for the first connecting rod 3 to pass through and a number of second connecting holes for the second connecting rod to pass through are provided on the first connecting plate 1-2; As Figure 6, similar to the first buoyancy structure 1, a second connecting plate 6-2 is provided on the second buoyancy structure 6, and a number of third connection holes for the first connecting rod 3 to pass through and a number of fourth connection holes for the second connecting rod to pass through are provided on the second connecting plate 6-2; the first connecting rod 3 passes through the first connection hole and the third connection hole, and threaded sections are provided at both ends of the first connecting rod 3. By providing first limit nuts 2-2 threadedly connected to the first connecting rod 3 on both sides of the first connecting plate 1-2, the connection between the first connecting rod 3 and the first connecting plate 1-2 is realized. By providing second limit nuts 2-3 threadedly connected to the first connecting rod 3 on both sides of the second connecting plate 6-2, the connection between the first connecting rod 3 and the second connecting plate 6-2 is realized; the second connecting rod passes through the second connection hole and the fourth connection hole, and threaded sections are provided at both ends of the second connecting rod. By providing first limit nuts 2-2 threadedly connected to the second connecting rod on both sides of the first connecting plate 1-2, the connection between the second connecting rod and the first connecting plate 1-2 is realized. By providing second limit nuts 2-3 threadedly connected to the second connecting rod on both sides of the second connecting plate 6-2, the connection between the second connecting rod and the second connecting plate 6-2 is realized. By inserting the first connecting rod 3 into different first connection holes and different third connection holes, and inserting the second connecting rod into different second connection holes and fourth connection holes, the distance between the first connecting rod 3 and the second connecting rod is adjusted.

[0047] Embodiment Five

[0048] As Figure 6 shown, the difference between this embodiment and Embodiment Four is that: in this embodiment, the first buoyancy structure 1 is a semi-circular buoyancy rod; the second buoyancy structure 6 is a semi-circular buoyancy rod; the first connecting rod 3 and the second connecting rod are both adjusted to a certain length, and the first buoyancy structure 1 and the second buoyancy structure 6 can form an annular structure. At this time, the first buoyancy structure 1 and the second buoyancy structure 6 can be connected through the connecting structure. When connected into a whole, the first buoyancy structure 1 and the second buoyancy structure 6 can be regarded as constituting an annular swimming ring.

[0049] Embodiment Six

[0050] The difference between this embodiment and Embodiments One to Four is that: in this embodiment, the first buoyancy structure 1 is an inflatable structure; the second buoyancy structure 6 is an inflatable structure. The inflatable structure can be cylindrical, semi-circular, or connected into a ring.

[0051] Embodiment Seven

[0052] As Figures 7 to 8As shown, the difference between this embodiment and the first to fourth embodiments lies in that: in this embodiment, water paddling structures are hinged at one end of the first connecting rod 3 and one end of the second connecting rod respectively, and the two water paddling structures are located on both sides of the first buoyancy structure 1; shoulder baffles 14 are provided on both the first connecting rod 3 and the second connecting rod.

[0053] In some specific embodiments, the water paddling structure is connected to the first connecting rod 3 or the second connecting rod through a universal hinge structure 7. The water paddling structure includes a water paddling rod 9, a paddle 11, and a footrest 13. The water paddling rod 9 can be telescopic. One end of the water paddling rod 9 is rotatably connected to the universal hinge structure 7 through a rotary joint 8. The paddle 11 is provided at the other end of the water paddling rod 9. One end of the footrest 13 is connected to a pull rope 12. The pull rope 12 is arranged on a wire reel 10, and the wire reel 10 is arranged on the water paddling rod 9.

[0054] When using this embodiment, wear the swimming assistance device of this embodiment. The shoulder baffle 14 abuts against the front chest or the shoulder. Hold the corresponding water paddling rod 9 with both hands and move the water paddling rod 9, making the paddle 11 paddle backward, then send it obliquely forward and upward, and then press down, cycling through the periodic water paddling actions of backward paddling, forward sending, and downward pressing. During the water paddling process, cooperate with the rotation of the wrist, so that the rotation of the water paddling rod drives the paddle 11 to rotate, causing a change in the water-facing angle of the paddle 11 and generating the best water paddling effect. When sending forward, the water-facing angle of the paddle 11 is 0°. When paddling backward, the water-facing angle of the paddle 11 is 90°. Pull out the pull rope 12 on the wire reel 10, put the footrest 13 on the sole of the foot, and with the help of the force of the sole pushing backward, the pull rope 12 pulls the paddle 11 to paddle backward, strengthening the water paddling force and accelerating the swimming speed. The length of the water paddling rod 9 can be adjusted telescopically to produce different water paddling effects.

[0055] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A swimming aid device, characterized in that: Comprising: A first buoyancy structure, a second buoyancy structure, a first connecting rod, a second connecting rod, a first shoulder strap and a second shoulder strap. Both the first connecting rod and the second connecting rod are telescopic. One end of the first connecting rod and one end of the second connecting rod are both slidably connected to the first buoyancy structure and can be detached. The other end of the first connecting rod and the other end of the second connecting rod are both slidably connected to the second buoyancy structure and can be detached. The first connecting rod and the second connecting rod can move away from each other or approach each other. The first shoulder strap is slidably connected to the first connecting rod and can be detached. The second shoulder strap is slidably connected to the second connecting rod and can be detached.

2. The swimming aid device according to claim 1, wherein: Two first transverse chutes are provided on the first buoyancy structure. A first locking structure is provided in the first transverse chute. The first connecting rod can lock its position in the first transverse chute through one of the first locking structures. The second connecting rod can lock its position in the other first transverse chute through the other first locking structure. Two second transverse chutes are provided on the second buoyancy structure. A second locking structure is provided in the second transverse chute. The first connecting rod can lock its position in the second transverse chute through one of the second locking structures. The second connecting rod can lock its position in the other second transverse chute through the other second locking structure.

3. The swimming aid device according to claim 2, characterized in that: The first locking structure and the second locking structure have the same structure. Both the first locking structure and the second locking structure include a fastening collar, a screw rod and a locking nut. The screw rod is provided on the outside of the fastening collar. The screw rod is threadedly connected to the locking nut. The first connecting rod or the second connecting rod extends into the fastening collar. The screw rod is located in the first transverse chute or the second transverse chute.

4. The swimming aid device according to claim 3, characterized in that: Both the first connecting rod and the second connecting rod are located on one side of the first buoyancy structure, and the locking nut is located on the other side of the first buoyancy structure. Both the first connecting rod and the second connecting rod are located on one side of the second buoyancy structure, and the locking nut is located on the other side of the second buoyancy structure.

5. The swimming aid device according to claim 1, wherein: A first connecting plate is provided on the first buoyancy structure. A number of first connection holes for the first connecting rod to pass through and a number of second connection holes for the second connecting rod to pass through are provided on the first connecting plate. A second connecting plate is provided on the second buoyancy structure. A number of third connection holes for the first connecting rod to pass through and a number of fourth connection holes for the second connecting rod to pass through are provided on the second connecting plate. The first connecting rod passes through the first connection hole and the third connection hole and is connected through a first limit nut. The second connecting rod passes through the second connection hole and the fourth connection hole and is connected through a second limit nut.

6. The swimming assistance device according to claim 1, characterized in that: The first buoyancy structure is a buoyancy board, a buoyancy rod or an inflatable structure. The second buoyancy structure is a buoyancy board, a buoyancy rod or an inflatable structure.

7. The swimming aid device according to claim 1, characterized in that: By adjusting the first connecting rod and the second connecting rod, the first buoyancy structure and the second buoyancy structure can form an annular structure.

8. The swimming aid device according to claim 1, characterized in that: A water paddling structure is hingedly provided at one end of the first connecting rod and one end of the second connecting rod, and the two water paddling structures are respectively located on both sides of the first buoyancy structure; shoulder baffles are provided on both the first connecting rod and the second connecting rod.

9. The swimming aid device according to claim 8, characterized in that: The water paddling structure is connected to the first connecting rod or the second connecting rod through a universal hinge structure. The water paddling structure includes a water paddling rod and a paddle. The water paddling rod can be telescoped. One end of the water paddling rod is rotatably connected to the universal hinge structure, and the paddle is provided at the other end of the water paddling rod.

10. The swimming aid device according to claim 9, characterized in that: The water paddling structure further includes a footrest. One end of the footrest is connected to a pulling rope. The pulling rope is arranged on a wire reel, and the wire reel is arranged on the water paddling rod.

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