swimming fins

Abstract

The present invention belongs to the technical field of swimming equipment and discloses a swimming fin. Specifically, it includes a wearing assembly, a bionic sole, and an elastic reset assembly. The wearing assembly includes a foot support and a first wearing member, the first wearing member being arranged on the foot support; the bionic sole is located at the bottom of the foot support, the rear end of the bionic sole is rotatably arranged on the foot support, and the bionic sole extends forward from its rear end and exceeds the front end of the foot support; the elastic reset assembly is arranged on the foot support and connected to the bionic sole. The bionic sole can rotate from a water-pumping position to a drag-reducing position under the action of the elastic reset assembly. In the water-pumping position, the bionic sole is pressed against the bottom surface of the foot support. In the drag-reducing position, an acute angle opening forward is formed between the bionic sole and the foot support. The swimming fins provided by the present invention can improve the propulsion efficiency of the fins and reduce the swimmer's fatigue.

Description

Technical Field

[0001] The present invention relates to the technical field of swimming equipment, in particular to a swimming fin. Background Art

[0002] In swimming, most swimming equipment and diving equipment use fins as the main propulsion tool.

[0003] When a swimmer kicks the water, their fins push the water backwards, and the reaction force of the water gives the swimmer forward momentum. Swimmers achieve swimming through the water by repeatedly kicking the water. However, current fin propulsion efficiency is low, which can easily fatigue swimmers. Summary of the Invention

[0004] The purpose of the present invention is to provide a swimming fin, which can improve the propulsion efficiency of the fin and reduce the swimmer's fatigue.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Swimming fins, including:

[0007] A wearable component includes a foot support palm and a first wearable component, wherein the first wearable component is arranged on the foot support palm;

[0008] A bionic sole is located at the bottom of the foot support, with the rear end of the bionic sole being rotatably disposed on the foot support, and the bionic sole extending forward from the rear end thereof and beyond the front end of the foot support;

[0009] An elastic reset component is arranged on the foot support palm and is connected to the bionic foot sole. The bionic foot sole can be rotated from a water-pumping position to a drag reduction position under the action of the elastic reset component. In the water-pumping position, the bionic foot sole is in contact with the bottom surface of the foot support palm. In the drag reduction position, an acute angle opening forward is formed between the bionic foot sole and the foot support palm.

[0010] Optionally, the bionic foot includes a bionic skeleton and a bionic web, the rear end of the bionic skeleton is rotatably arranged on the foot supporting palm, the bionic skeleton extends forward from its rear end and exceeds the front end of the foot supporting palm, the bionic web is arranged on the bionic skeleton, the elastic reset component is connected to the bionic skeleton, and the bionic skeleton can rotate under the action of the elastic reset component to rotate the bionic web from the water-splashing position to the drag reduction position. In the water-splashing position, the bionic skeleton and the bionic web are both in contact with the bottom surface of the foot supporting palm. In the drag reduction position, the acute angle is formed between the bionic web and the foot supporting palm.

[0011] Optionally, the bionic skeleton includes a plurality of bone bars, the rear end of each bone bar is rotatably arranged on the foot support palm, each bone bar extends forward from its rear end and exceeds the front end of the foot support palm, each bone bar extends radially from the rear end to the front end in a fan shape, and the fan-shaped bionic web is arranged on each bone bar, and the elastic reset component includes an elastic member corresponding to each bone bar, each elastic member is arranged on the foot support palm, and is connected to the corresponding bone bar, each bone bar can be rotated under the action of the corresponding elastic member to rotate the bionic web from the water-spinning position to the drag reduction position, and in the water-spinning position, each bone bar is abutted against the bottom surface of the foot support palm.

[0012] Optionally, it also includes a support seat and a fixed seat, and the support seat and the fixed seat are both arranged on the bottom surface of the foot support palm. In the front and rear direction of the foot support palm, the fixed seat is located on the rear side of the support seat, and the rear end of each bone bar is rotatably set on the support seat, and one end of each elastic member is clamped between the fixed seat and the foot support palm, and the other end passes through the support seat and is connected to the corresponding bone bar.

[0013] Optionally, the support seat includes a support sub-series corresponding to the bone bar one by one, the support sub-series includes a first side panel, a second side panel and a rotating shaft, the first side panel and the second side panel are oppositely and spaced apart on the foot support palm, one end of the rotating shaft is arranged on the first side panel, and the other end is arranged on the second side panel, the rear end of the bone bar is arranged on the rotating shaft, and the elastic member passes through the rotating shaft, the foot support palm, the first side panel and the second side panel.

[0014] Optionally, the elastic member includes a first leg portion, a curled portion and a second leg portion connected in sequence, each of the first leg portions is clamped between the fixed seat and the foot support palm, and the second leg portion passes through the rotating shaft, the foot support palm, the first side plate and the second side plate, and is connected to the corresponding bone bar.

[0015] Optionally, along the front-to-back direction of the foot supporting palm, the rear end of the bionic web is in front of the rear end of the bionic skeleton, and the front end of the bionic web covers the front end of the bionic skeleton. The swimming fins also include a limiting component, the bionic web is elastic, the limiting component is fixed on the foot supporting palm, and the rear end of the bionic web is clamped between the limiting component and the foot supporting palm.

[0016] Optionally, the limiting assembly includes a first limiting member and a second limiting member, the first limiting member and the second limiting member are both fixed on the foot supporting palm, the rear end of the bionic web is clamped between the first limiting member and the foot supporting palm, the rear end of the bionic web is clamped between the second limiting member and the foot supporting palm, and the first limiting member and the second limiting member are symmetrical about the symmetry axis of the fan-shaped bionic web.

[0017] Optionally, the wearing component also includes a heel support and a limit pin, the heel support includes a heel plate, a base plate and a limit block, the foot support palm is provided with a first groove opening downward, the heel plate is arranged at the rear end of the base plate, the limit block is arranged at the front end of the base plate, the limit block is embedded in the first groove, the foot support palm located behind the first groove is clamped between the limit block and the plate body, and the limit pin is passed through the limit block and the foot support palm along the width direction of the foot support palm and is fixed to the limit block and the foot support palm.

[0018] Optionally, the acute angle is between 30° and 45°.

[0019] Beneficial effects:

[0020] The swimming fins provided by the present invention are provided in such a way that the swimmer wears the foot supporting palm under the sole of the foot by using the first wearing piece. When the swimmer pushes off the foot, the foot supporting palm tends to move in a direction approximately perpendicular to the surface where the foot supporting palm is located. Under the action of the swimmer's pushing force and the water resistance, the bionic foot rotates to a paddling position relative to the foot supporting palm. Under the limiting action of the foot supporting palm, the bionic foot abuts against the bottom surface of the foot supporting palm, so that the surface where the bionic foot is located is approximately parallel to the surface where the foot supporting palm is located. Under the action of the swimmer's pushing off the foot, the bionic foot and the foot supporting palm both move in a direction approximately perpendicular to the surface where the foot supporting palm is located. The bionic foot moves perpendicularly to the surface of the foot support and pushes water, pushing a large amount of water, thereby improving swimming efficiency and speed. After completing a kicking action, swimmers often retract their feet. When retracting, the bionic foot, under the combined action of water resistance and the elastic reset component, forms an acute angle between the bionic foot and the foot support, opening forward compared to the foot support. The projected area of ​​the bionic foot in the retraction direction is reduced, thereby reducing the resistance of the retraction action, improving swimming efficiency, making the swimmer more energy-efficient, and increasing swimming speed. The acute angle ensures that the bionic foot always points forward, preventing it from flipping backward and causing the swimming fin to fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of a swimming fin (bionic foot in the water-skiing position) provided by an embodiment of the present invention;

[0022] Figure 2Schematic diagram of the structure of a swimming fin (bionic foot in a drag-reducing position) provided by an embodiment of the present invention;

[0023] Figure 3 1 is an exploded schematic diagram of a swimming fin provided by an embodiment of the present invention;

[0024] Figure 4 This is a bottom view of a swimming fin provided by an embodiment of the present invention;

[0025] Figure 5 yes Figure 4 Enlarged schematic diagram of point A in the middle.

[0026] In the picture:

[0027] 1. Wearable component; 11. Foot support; 111. Receiving slot; 12. First wearable component; 13. Heel support; 131. Heel plate; 132. Bottom plate; 133. Limit block; 14. Limit pin; 15. Second wearable component;

[0028] 2. Bionic foot; 21. Bionic skeleton; 211. Bone strip; 22. Bionic web;

[0029] 3. Elastic reset assembly; 31. Elastic member; 311. First leg; 312. Curled portion; 313. Second leg;

[0030] 4. Support base; 41. Support sub-base; 411. First side plate; 412. Second side plate; 413. Rotating shaft;

[0031] 5. Fixed seat;

[0032] 6. Limiting assembly; 61. First limiting member; 62. Second limiting member. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0034] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] like Figure 1-Figure 3 As shown, this embodiment provides a swimming fin, specifically, it includes a wearing component 1, a bionic sole 2 and an elastic reset component 3.

[0038] like Figure 1-Figure 3 As shown, the wearable assembly 1 includes a foot support 11 and a first wearable member 12, which is disposed on the foot support 11. In other words, a swimmer can wear the foot support 11 on their foot using the first wearable member 12. The specific structure of the first wearable member 12 is not limited; in this embodiment, it includes two annular rubber fastening straps spaced apart along the length (i.e., the front-to-back direction) of the foot support 11.

[0039] like Figure 1-Figure 3 As shown, the bionic foot 2 is located at the bottom of the foot support 11. The rear end of the bionic foot 2 is pivotally mounted on the foot support 11, and the bionic foot 2 extends forward from its rear end and beyond the front end of the foot support 11. The structure and shape of the bionic foot 2 are modeled after animal feet, enabling swimmers to achieve greater swimming thrust, faster swimming speeds, and reduced forward resistance. In this embodiment, the bionic foot 2 is designed based on a duck's foot.

[0040] like Figure 1 and Figure 2As shown, the elastic reset component 3 is arranged on the foot support palm 11 and is connected to the bionic foot sole 2. The bionic foot sole 2 can be rotated from the water-pumping position to the drag reduction position under the action of the elastic reset component 3. In the water-pumping position, the bionic foot sole 2 is against the bottom surface of the foot support palm 11. In the drag reduction position, an acute angle opening forward is formed between the bionic foot sole 2 and the foot support palm 11. If the acute angle is too large, when the swimmer kicks his feet, the elastic reset component 3 absorbs part of the kicking thrust, and the water-pushing effect is affected. If the acute angle is too small, the drag reduction effect is reduced, which increases the resistance to the swimmer's forward movement. Preferably, the acute angle is between 30° and 45°, taking into account both the water-pushing effect and the drag reduction effect, and maximizing the sum of the two.

[0041] The swimming fins provided in this embodiment are as follows: the swimmer uses the first wearing piece 12 to wear the foot support palm 11 under the sole of the foot. When the swimmer pushes off the foot, the foot support palm 11 tends to move in a direction approximately perpendicular to the surface where the foot support palm 11 is located. Under the action of the swimmer's pushing force and the water resistance, the bionic foot sole 2 rotates to the water-striking position compared to the foot support palm 11. Under the limiting action of the foot support palm 11, the bionic foot sole 2 is pressed against the bottom surface of the foot support palm 11, so that the surface where the bionic foot sole 2 is located is approximately parallel to the surface where the foot support palm 11 is located. Under the action of the swimmer's pushing off the foot, the bionic foot sole 2 and the foot support palm 11 are parallel to each other. The palm 11 moves and pushes water in a direction approximately perpendicular to the surface of the foot support palm 11, with a large amount of water pushed, thereby improving swimming efficiency and swimming speed; after completing a kicking action, the swimmer often makes a foot-retracting action. When retracting the foot, the bionic foot sole 2, under the combined action of the water resistance and the elastic reset component 3, rotates to a resistance-reducing position compared to the foot support palm 11, forming an acute angle opening forward between the bionic foot sole 2 and the foot support palm 11. The projected area of ​​the bionic foot sole 2 in the foot-retracting direction is reduced, thereby reducing the resistance of the foot-retracting action, improving swimming efficiency, making the swimmer more labor-saving, and increasing the swimming speed. The acute angle enables the bionic foot sole 2 to always remain forward, preventing the bionic foot sole 2 from flipping backward and causing the swimming fins to fail.

[0042] like Figure 1-Figure 3 As shown, the bionic foot 2 optionally includes a bionic skeleton 21 and a bionic web 22. The rear end of the bionic skeleton 21 is rotatably mounted on the foot support 11. The bionic skeleton 21 extends forward from its rear end and beyond the front end of the foot support 11. The bionic web 22 is mounted on the bionic skeleton 21. The elastic reset assembly 3 is connected to the bionic skeleton 21. The bionic skeleton 21 can rotate under the action of the elastic reset assembly 3 to rotate the bionic web 22 from a water-spinning position to a drag-reducing position. In the water-spinning position, the bionic skeleton 21 and the bionic web 22 both abut against the bottom surface of the foot support 11. In the drag-reducing position, an acute angle is formed between the bionic web 22 and the foot support 11. The bionic web 22 is flexible and supported by the bionic skeleton 21.

[0043] like Figure 1-Figure 3 As shown, optionally, the bionic skeleton 21 includes a plurality of bone bars 211, the rear end of each bone bar 211 is rotatably set on the foot support palm 11, each bone bar 211 extends forward from its rear end and exceeds the front end of the foot support palm 11, each bone bar 211 extends radially from the rear end to the front end in a fan shape, and a fan-shaped bionic web 22 is set on each bone bar 211, and the elastic reset component 3 includes an elastic member 31 corresponding to each bone bar 211, each elastic member 31 is set on the foot support palm 11, and is connected to the corresponding bone bar 211, each bone bar 211 can rotate under the action of the corresponding elastic member 31, so that the bionic web 22 rotates from the water-pumping position to the drag reduction position. In the water-pumping position, each bone bar 211 is abutted against the bottom surface of the foot support palm 11. Each bone bar 211 is connected to a corresponding elastic member 31. As the direction of force applied by the swimmer's foot changes, the resetting and damping effects of each elastic member 31 become independent, resulting in different forces or positions for each bone bar 211. The flexible bionic web 22 can also adapt to the posture of each bone bar 211, making the bionic foot 2 in the water more similar to a real animal's foot, enhancing the bionic effect and, in turn, the swimming experience. In this embodiment, there are three bone bars 211, two of which are located at each end of the bionic web 22 in the width direction of the foot support palm 11, and the other bone bar 211 is centrally located between the two bone bars 211 at each end, thereby supporting the bionic web 22. The bone bars 211 in this embodiment are made of iron bars, which are high in strength and low in cost.

[0044] like Figure 3-Figure 5 As shown, optionally, the swimming fin further includes a support base 4 and a fixing base 5, both of which are arranged on the bottom surface of the foot support palm 11. In the front-to-back direction of the foot support palm 11, the fixing base 5 is located at the rear side of the support base 4, and the rear end of each bone bar 211 is rotatably arranged on the support base 4. One end of each elastic member 31 is clamped between the fixing base 5 and the foot support palm 11, and the other end passes through the support base 4 and is connected to the corresponding bone bar 211. In other words, the bone bar 211 is supported by the support base 4, and the elastic member 31 is limited by the fixing base 5 and the bone bar 211. The arrangement and installation of the elastic member 31 and the bone bar 211 on the foot support palm 11 are achieved through the support base 4 and the fixing base 5, with a reasonable layout and a simple structure.

[0045] like Figure 3-Figure 5As shown, further, in this embodiment, the support seat 4 includes a support sub-base 41 corresponding to the bone bar 211 on a one-to-one basis. The support sub-base 41 includes a first side plate 411, a second side plate 412, and a rotation shaft 413. The first side plate 411 and the second side plate 412 are arranged oppositely and spaced apart on the foot support palm 11. One end of the rotation shaft 413 is arranged on the first side plate 411, and the other end is arranged on the second side plate 412. The rear end of the bone bar 211 is arranged on the rotation shaft 413. The elastic member 31 passes through the rotation shaft 413, the foot support palm 11, the first side plate 411, and the second side plate 412. The first side plate 411 and the second side plate 412 are located on both sides of the bone bar 211, and have a limiting effect on the bone bar 211, preventing the bone bar 211 from deflecting along the length direction of the rotation shaft 413 due to changes in force. The elastic member 31 passes through the shaft 413, the foot support 11, the first side plate 411, and the second side plate 412, and is connected to the bone bar 211. The elastic member 31 is arranged in a concealed position and is not easily affected. In this embodiment, the rear end of the bone bar 211 has a through hole, and the bone bar 211 is mounted on the shaft 413, allowing it to rotate around the shaft 413.

[0046] like Figure 3-Figure 5 As shown, specifically, the elastic member 31 includes a first leg portion 311, a curled portion 312, and a second leg portion 313, which are connected in sequence. Each first leg portion 311 is clamped between the fixing base 5 and the foot support palm 11. The second leg portion 313 passes through the rotating shaft 413, the foot support palm 11, the first side plate 411 and the second side plate 412, and is connected to the corresponding bone bar 211. In this embodiment, the elastic member 31 is a torsion spring. When not subjected to external force, the first leg portion 311 forms an obtuse angle with the second support portion.

[0047] like Figure 3-Figure 5 As shown, optionally, along the front-to-back direction of the foot support palm 11, the rear end of the bionic web 22 is ahead of the rear end of the bionic frame 21, and the front end of the bionic web 22 covers the front end of the bionic frame 21. The swimming fin further includes a limiting component 6. The bionic web 22 is elastic and fixed to the foot support palm 11. The rear end of the bionic web 22 is clamped between the limiting component 6 and the foot support palm 11. The limiting component 6 fixes the rear end of the bionic web 22 to the bottom of the foot support palm 11, not only achieving the fixation of the bionic web 22 relative to the bionic frame 21, but also limiting the rotation range of the bionic web 22 and the bionic frame 21, thereby preventing the bionic web 22 and the bionic frame 21 from overturning and causing the aforementioned acute angle to become an obtuse angle.

[0048] like Figure 3-Figure 5As shown, optionally, the limiting component 6 includes a first limiting member 61 and a second limiting member 62, the first limiting member 61 and the second limiting member 62 are both fixed on the foot supporting palm 11, the rear end of the bionic web 22 is clamped between the first limiting member 61 and the foot supporting palm 11, and the rear end of the bionic web 22 is clamped between the second limiting member 62 and the foot supporting palm 11, and the first limiting member 61 and the second limiting member 62 are symmetrical about the symmetry axis of the fan-shaped bionic web 22 to improve the force uniformity and stability of the bionic web 22 in the width direction of the foot supporting palm 11.

[0049] like Figure 5 As shown, in this embodiment, a receiving groove 111 is provided on the bottom surface of the foot support palm 11, and the support seat 4, the fixing seat 5, the elastic member 31 and the limiting assembly 6 are all located in the receiving groove 111. After the swimmer goes ashore, the groove edge of the receiving groove 111 is connected to the ground. The support seat 4, the fixing seat 5, the elastic member 31 and the limiting assembly 6 will not affect the stability of the foot support palm 11 after it touches the ground, which is convenient for the swimmer to walk.

[0050] like Figure 3-Figure 5 As shown, optionally, the wearable component 1 also includes a heel support 13 and a limiting pin 14. The heel support 13 includes a heel plate 131, a bottom plate 132, and a limiting block 133. A first groove opening downward is provided on the foot support palm 11. The heel plate 131 is arranged at the rear end of the bottom plate 132, and the limiting block 133 is arranged at the front end of the bottom plate 132. The limiting block 133 is embedded in the first groove. The foot support palm 11 located behind the first groove is clamped between the limiting block 133 and the plate body. The limiting pin 14 is passed through the limiting block 133 and the foot support palm 11 along the width direction of the foot support palm 11 and is fixed to the limiting block 133 and the foot support palm 11. Through the above-mentioned coordination, the positioning and assembly of the heel support 13 and the foot support palm 11 are realized, which is simple, quick, and easy to disassemble and assemble. In this embodiment, the heel support 13 is a plastic part with a certain degree of flexibility to adapt to the movement of the swimmer's feet compared to the legs.

[0051] like Figure 3 As shown, in this embodiment, the heel support 13 is further provided with a second wearing member 15, specifically, it includes two annular rubber fastening belts, and the two rubber fastening belts are arranged on the heel plate 131 at intervals along the height direction of the heel plate 131.

[0052] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Swimming fins, characterized in that: include: A wearable assembly (1) comprises a foot support palm (11) and a first wearable component (12), wherein the first wearable component (12) is arranged on the foot support palm (11); A bionic sole (2) is located at the bottom of the foot support palm (11), the rear end of the bionic sole (2) is rotatably arranged on the foot support palm (11), and the bionic sole (2) extends forward from the rear end thereof and exceeds the front end of the foot support palm (11); An elastic reset component (3) is arranged on the foot support palm (11) and is connected to the bionic foot sole (2). The bionic foot sole (2) can be rotated from a water-spinning position to a drag-reducing position under the action of the elastic reset component (3). In the water-spinning position, the bionic foot sole (2) abuts against the bottom surface of the foot support palm (11). In the drag-reducing position, an acute angle opening forward is formed between the bionic foot sole (2) and the foot support palm (11). The bionic sole (2) comprises a bionic frame (21) and a bionic web (22), the rear end of the bionic frame (21) is rotatably arranged on the foot support palm (11), the bionic frame (21) extends forward from its rear end and exceeds the front end of the foot support palm (11), the bionic web (22) is arranged on the bionic frame (21), the elastic reset component (3) is connected to the bionic frame (21), the bionic frame (21) can be rotated under the action of the elastic reset component (3) so that the bionic web (22) is rotated from the water-spinning position to the drag reduction position, in the water-spinning position, the bionic frame (21) and the bionic web (22) are both in contact with the bottom surface of the foot support palm (11), and in the drag reduction position, the acute angle is formed between the bionic web (22) and the foot support palm (11); Along the front-to-back direction of the foot support palm (11), the rear end of the bionic fin (22) is in front of the rear end of the bionic skeleton (21), and the front end of the bionic fin (22) covers the front end of the bionic skeleton (21); the swimming fin further comprises a limiting component (6); the bionic fin (22) is elastic; the limiting component (6) is fixed to the foot support palm (11); and the rear end of the bionic fin (22) is sandwiched between the limiting component (6) and the foot support palm (11); The wearing assembly (1) further comprises a heel support member (13) and a limiting pin shaft (14), and a second wearing member (15) is further provided on the heel support member (13).

2. The swimming fin according to claim 1, characterized in that: The bionic skeleton (21) includes a plurality of bone strips (211), the rear end of each bone strip (211) is rotatably arranged on the foot support palm (11), each bone strip (211) extends forward from its rear end and exceeds the front end of the foot support palm (11), each bone strip (211) extends radially from the rear end to the front end in a fan shape, the fan-shaped bionic web (22) is arranged on each bone strip (211), and the elastic reset component (3) includes a plurality of bone strips (211) and a plurality of bone strips (211) connected to each bone strip (211). The strips (211) correspond to elastic members (31) one by one, each of the elastic members (31) is arranged on the foot supporting palm (11) and is connected to the corresponding bone strip (211). Each bone strip (211) can rotate under the action of the corresponding elastic member (31) to rotate the bionic fin (22) from the water-striking position to the drag-reducing position. In the water-striking position, each bone strip (211) is in contact with the bottom surface of the foot supporting palm (11).

3. The swimming fin according to claim 2, characterized in that: The invention also includes a support seat (4) and a fixed seat (5), wherein the support seat (4) and the fixed seat (5) are both arranged on the bottom surface of the foot support palm (11), and in the front-back direction of the foot support palm (11), the fixed seat (5) is located on the rear side of the support seat (4), and the rear end of each bone strip (211) is rotatably arranged on the support seat (4), and one end of each elastic member (31) is clamped between the fixed seat (5) and the foot support palm (11), and the other end passes through the support seat (4) and is connected to the corresponding bone strip (211).

4. The swimming fin according to claim 3, characterized in that: The support seat (4) includes a support sub-series (41) corresponding to the bone strip (211) one by one, and the support sub-series (41) includes a first side plate (411), a second side plate (412) and a rotating shaft (413), the first side plate (411) and the second side plate (412) are arranged on the foot support palm (11) opposite to each other and spaced apart, one end of the rotating shaft (413) is arranged on the first side plate (411), and the other end is arranged on the second side plate (412), the rear end of the bone strip (211) is arranged on the rotating shaft (413), and the elastic member (31) passes through the rotating shaft (413), the foot support palm (11), the first side plate (411) and the second side plate (412).

5. The swimming fin according to claim 4, characterized in that: The elastic member (31) comprises a first leg portion (311), a curled portion (312) and a second leg portion (313) connected in sequence, each of the first leg portions (311) being clamped between the fixing seat (5) and the foot support palm (11), and the second leg portion (313) passing through the rotating shaft (413), the foot support palm (11), the first side plate (411) and the second side plate (412), and being connected to the corresponding bone strip (211).

6. The swimming fin according to claim 5, characterized in that: The limiting assembly (6) comprises a first limiting member (61) and a second limiting member (62), wherein the first limiting member (61) and the second limiting member (62) are both fixed on the foot supporting palm (11), the rear end of the bionic fin (22) is clamped between the first limiting member (61) and the foot supporting palm (11), and the rear end of the bionic fin (22) is clamped between the second limiting member (62) and the foot supporting palm (11), and the first limiting member (61) and the second limiting member (62) are symmetrical about the symmetry axis of the fan-shaped bionic fin (22).

7. The swimming fin according to any one of claims 1 to 6, characterized in that: The heel support member (13) comprises a heel plate (131), a bottom plate (132) and a limit block (133); a first groove with an opening facing downward is provided on the foot support palm (11); the heel plate (131) is arranged at the rear end of the bottom plate (132); the limit block (133) is arranged at the front end of the bottom plate (132); the limit block (133) is embedded in the first groove; the foot support palm (11) located behind the first groove is clamped between the limit block (133) and the plate body; the limit pin (14) is passed through the limit block (133) and the foot support palm (11) along the width direction of the foot support palm (11) and is fixed to the limit block (133) and the foot support palm (11).

8. The swimming fin according to claim 7, characterized in that: The acute angle is between 30° and 45°.

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