A variable tail fin for a paddleboard

Abstract

This invention discloses a variable tail fin for paddleboards, comprising a fin-shaped main tail fin plate, a connecting seat mounted on the bottom side of the paddleboard, and a mounting seat mounted in the connecting seat. The mounting seat includes a fixed bracket fixed in the connecting seat and a limiting bracket fixed on the fixed bracket. The limiting bracket is located on the side of the fixed bracket away from the paddleboard and is connected to the fixed bracket by bolts. The variable tail fin of this invention, through a reasonable structural design, enables the tail fin to rotate under force. When the tail fin collides with debris, it can rotate and buffer, reducing the possibility of damage. Furthermore, the entry arc of the main tail fin plate can be changed according to user needs, allowing for some degree of manual control of the paddleboard speed to meet the needs of different users. Simultaneously, the tail fin also has a directional function, improving the flexibility of paddleboard use.

Description

Technical Field

[0001] This invention relates to the field of paddleboard technology, and more particularly to a variable tail fin for paddleboards. Background Technology

[0002] The tail fin in the paddleboard is similar to the fin of a fish. It is installed on the bottom side of the tail of the paddleboard and plays a role in stabilizing the direction when gliding on water surfing.

[0003] Existing paddleboard tail fins generally come in two types: one is directly fixed to the paddleboard using a mounting bracket, and the other is detachably mounted on the paddleboard. When not in use, the tail fin can be removed to prevent injury. However, both types of tail fins are generally fixed after being mounted on the paddleboard and cannot move. When users encounter complex underwater environments or hard debris in the water, the tail fin is easily injured or even broken, affecting the user experience. In addition, existing paddleboard tail fins generally do not have the function of changing direction or speed, and cannot be adjusted for different people surfing, resulting in poor adaptability.

[0004] Therefore, considering the aforementioned technical problems, it is necessary to provide a new technical solution. Summary of the Invention

[0005] The purpose of this invention is to provide a variable tail fin for paddleboards that can reduce collision damage caused by complex hydrological environments and has the function of changing direction and speed.

[0006] To solve the above-mentioned technical problems, the present invention provides a variable tail fin for a paddlewheel, the specific technical solution of which is as follows:

[0007] A variable tail fin for a propeller includes a fin-shaped main tail fin, a connecting seat mounted on the bottom side of the propeller, and a mounting seat mounted in the connecting seat. The mounting seat includes a fixed bracket fixed in the connecting seat and a limiting bracket fixed on the fixed bracket. The limiting bracket is located on the side of the fixed bracket away from the propeller and is connected to the fixed bracket by bolts. There is a gap between the limiting bracket and the fixed bracket. The limiting bracket has a strip-shaped through hole perpendicular to the propeller. One end of the main tail fin is inserted into the strip-shaped through hole and the other end extends out of the strip-shaped through hole toward the fixed bracket. The main tail fin has a hinge hole and a hinge shaft in the strip-shaped through hole. The position of the hinge hole is adapted to the hinge shaft so that the main tail fin can rotate around the hinge shaft in the strip-shaped through hole.

[0008] Preferably, an elastic mechanism is provided in the gap formed between the fixed bracket and the limiting bracket, and the elastic mechanism is connected to the end of the tail fin main board near the propeller to facilitate the reset of the tail fin main board after rotation.

[0009] Preferably, the elastic mechanism includes a spring and a fixing rod. The fixing rod is axially perpendicular to the propeller and its two ends are respectively connected and fixed to a fixing bracket and a limiting bracket. One end of the spring is fixed to the fixing rod, and the other end is connected to the end of the tail fin main plate near the propeller.

[0010] Preferably, the spring has a connector at one end near the tail fin main plate. The connector is annular, and the tail fin main plate has a connection hole at the end near the propeller. The connector passes through the connection hole to connect the spring to the tail fin main plate.

[0011] Preferably, a limiting scale is provided in the gap formed between the fixed bracket and the limiting bracket. The position of the limiting scale is adapted to the position of the strip-shaped through hole, and the limiting scale is located on the rotation path of the tail fin main board near the propeller. The end of the limiting scale away from the tail fin main board is fixed, and the end near the tail fin main board can be extended and retracted to adjust the limiting length and thus adjust the rotation angle of the tail fin main board.

[0012] Preferably, the connecting seat is fixed with an adjusting rod, and the paddle plate has an adjusting hole that penetrates the paddle plate. The adjusting hole is arc-shaped, and the position of the adjusting rod is adapted to the adjusting hole, and the adjusting rod can move along the adjusting hole.

[0013] Preferably, the adjusting holes and adjusting rods are a pair, with the two adjusting rods located near the two ends of the connecting seat, and the two adjusting holes being concentric and symmetrically arranged arcs.

[0014] Preferably, the adjusting rod penetrates the paddle plate, and an adjusting pad 6 is fixed at the end away from the connecting seat so that the user can adjust the direction by hand or foot.

[0015] The variable tail fin for a paddleboard of the present invention has the following beneficial effects:

[0016] The variable tail fin for paddleboards of the present invention enables the tail fin to rotate under force through a reasonable structural design. When the tail fin collides with debris, it can rotate and buffer to reduce the possibility of damage. In addition, the water entry arc of the tail fin main board can be changed according to the user's needs, so as to control the speed of the paddleboard to a certain extent and meet the needs of different users. At the same time, the tail fin also has a direction-changing function, which improves the flexibility of paddleboard use.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a variable tail fin for a propeller;

[0020] Figure 2 for Figure 1 Schematic diagram of the installation structure of the mid-tail fin;

[0021] Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram;

[0022] Figure 4 for Figure 1 A schematic diagram showing the connection status between the connecting seat and the propeller.

[0023] Figure 5 for Figure 4 A schematic diagram of the structure of the adjustment hole.

[0024] Among them, 1-tail fin main board; 2-connector; 3-mounting base; 31-fixed bracket; 32-limiting bracket; 33-elastic mechanism; 331-spring; 332-fixed rod; 333-connector; 34-limiting scale; 4-paddle; 41-adjustment hole; 5-adjustment rod; 6-adjustment pad. Implementation

[0025] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention. Example

[0026] Please see Figures 1 to 5A variable tail fin for a propeller includes a wing-shaped tail fin main board 1, a connecting seat 2 mounted on the bottom side of the propeller, and a mounting seat 3 mounted in the connecting seat. The mounting seat 3 includes a fixed bracket 31 fixed in the connecting seat and a limiting bracket 32 ​​fixed on the fixed bracket. The limiting bracket is located on the side of the fixed bracket away from the propeller and is connected to the fixed bracket by bolts. There is a gap between the limiting bracket and the fixed bracket. A strip-shaped through hole perpendicular to the propeller is opened on the limiting bracket. One end of the tail fin main board 1 is inserted into the strip-shaped through hole and the other end extends out of the strip-shaped through hole toward the fixed bracket. A hinge hole is opened on the tail fin main board. A hinge shaft is provided in the strip-shaped through hole. The position of the hinge hole is adapted to the hinge shaft so that the tail fin main board can rotate around the hinge shaft in the strip-shaped through hole.

[0027] A spring mechanism 33 is provided in the gap formed between the fixed bracket 31 and the limiting bracket 32. The spring mechanism is connected to the end of the tail fin main board near the propeller to facilitate the reset of the tail fin main board after rotation.

[0028] The elastic mechanism 33 includes a spring 331 and a fixing rod 332. The fixing rod 332 is axially perpendicular to the propeller and its two ends are respectively connected and fixed to a fixing bracket and a limiting bracket. One end of the spring is fixed to the fixing rod, and the other end is connected to the end of the tail fin main board near the propeller.

[0029] A connector 333 is provided at one end of the spring 331 near the tail fin main board 1. The connector is ring-shaped. A connection hole is provided at the end of the tail fin main board near the propeller. The connector passes through the connection hole to connect the spring and the tail fin main board.

[0030] A limiting scale 34 is provided in the gap formed between the fixed bracket 31 and the limiting bracket 32. The position of the limiting scale is adapted to the position of the strip-shaped through hole, and the limiting scale is located on the rotation path of the tail fin main board 1 near the propeller. The end of the limiting scale away from the tail fin main board is fixed, and the end near the tail fin main board can be extended and retracted to adjust the limiting length and thus adjust the rotation angle of the tail fin main board.

[0031] An adjusting rod 5 is fixed in the connecting seat 2. An adjusting hole 41 is opened through the paddle plate. The adjusting hole is arc-shaped. The position of the adjusting rod is adapted to the adjusting hole and the adjusting rod can move along the adjusting hole.

[0032] The adjusting hole 41 and the adjusting rod 5 are a pair. The two adjusting rods are located near the two ends of the connecting seat 2, and the two adjusting holes are concentric and symmetrically arranged arcs.

[0033] The adjusting rod 5 penetrates the paddle plate, and an adjusting pad 6 is fixed at the end away from the connecting seat so that the user can adjust the direction by hand or foot.

[0034] The variable tail fin of the paddleboard of the present invention, when used in complex hydrological conditions, causes the tail fin main plate 1 to be stressed when it collides with hard debris underwater. The end of the tail fin near the paddleboard 4 rotates around the hinge axis, and its outer end moves backward to reduce the impact force. After the collision, it resets under the action of the elastic mechanism 33, which can effectively reduce tail fin damage. Since the curvature of the tail fin in contact with the water affects the speed of paddleboard surfing, under good hydrological conditions, the deformation of the tail fin main plate can be limited by adjusting the length of the limit scale according to the different proficiency of different users in paddleboard operation, thereby controlling its water entry curvature and thus controlling the surfing speed to a certain extent. At the same time, the user can control the two adjustment rods 5 to move along the adjustment hole 41 by controlling the adjustment pad 6, thereby driving the connecting seat and the tail fin main plate to rotate and complete the underwater turning.

[0035] The beneficial effects of this invention are: through a reasonable structural design, the tail fin can achieve the function of rotating under force, and can rotate and buffer when the tail fin collides with debris, reducing the possibility of damage. In addition, the water entry arc of the tail fin main board can be changed according to the user's needs, and the speed of the paddleboard can be controlled to a certain extent to meet the needs of different users. At the same time, the tail fin also has a direction-changing function, which improves the flexibility of the paddleboard.

[0036] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present invention.

Claims

1. A variable tail fin for a paddleboard, characterized in that: The device includes a wing-shaped tail fin main board (1), a connecting seat (2) installed on the bottom side of the propeller, and a mounting seat (3) installed in the connecting seat. The mounting seat (3) includes a fixed bracket (31) fixed in the connecting seat and a limiting bracket (32) fixed on the fixed bracket. The limiting bracket is located on the side of the fixed bracket away from the propeller and is connected to the fixed bracket by bolts. There is a gap between the limiting bracket and the fixed bracket. A strip-shaped through hole perpendicular to the propeller is opened on the limiting bracket. One end of the tail fin main board (1) is inserted into the strip-shaped through hole and the end extends out of the strip-shaped through hole towards the fixed bracket. A hinge hole is opened on the tail fin main board. A hinge shaft is provided in the strip-shaped through hole. The position of the hinge hole is adapted to the hinge shaft so that the tail fin main board can rotate around the hinge shaft in the strip-shaped through hole. An adjusting rod (5) is fixed in the connecting seat (2), and an adjusting hole (41) is opened through the paddle plate. The adjusting hole is arc-shaped, and the position of the adjusting rod is adapted to the adjusting hole and the adjusting rod can move along the adjusting hole. The adjusting hole (41) and the adjusting rod (5) are a pair. The two adjusting rods are located near the two ends of the connecting seat (2). The two adjusting holes are concentric and symmetrically arranged arcs. The adjusting rod (5) penetrates the paddle plate, and an adjusting pad (6) is fixed at the end away from the connecting seat so that the user can adjust the direction by hand or foot.

2. The variable tail fin for a propeller according to claim 1, characterized in that: An elastic mechanism (33) is provided in the gap formed between the fixed bracket (31) and the limiting bracket (32). The elastic mechanism is connected to the end of the tail fin main board near the propeller so as to reset the tail fin main board after rotation.

3. The variable tail fin for a propeller according to claim 2, characterized in that: The elastic mechanism (33) includes a spring (331) and a fixing rod (332). The fixing rod (332) is axially perpendicular to the propeller and its two ends are respectively connected and fixed to the fixing bracket and the limiting bracket. One end of the spring is fixed to the fixing rod, and the other end is connected to the end of the tail fin main board near the propeller.

4. The variable tail fin for a propeller according to claim 3, characterized in that: The spring (331) has a connector (333) at one end near the tail fin main plate (1). The connector is ring-shaped. The end of the tail fin main plate near the propeller plate has a connection hole. The connector passes through the connection hole to connect the spring with the tail fin main plate.

5. The variable tail fin for a propeller according to claim 1, characterized in that: A limiting scale (34) is provided in the gap formed between the fixed bracket (31) and the limiting bracket (32). The position of the limiting scale is adapted to the position of the strip-shaped through hole, and the limiting scale is located on the rotation path of the tail fin main board (1) near the propeller. The end of the limiting scale away from the tail fin main board is fixed, and the end near the tail fin main board can be extended and retracted to adjust the limiting length and thus adjust the rotation angle of the tail fin main board.

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