Angle self-locking multi-tail fin surfboard

Abstract

This invention discloses an angle-locking multi-fin surfboard, relating to the field of multi-fin surfboard technology. It includes a first plate, with a hinge block rotatably mounted inside the first plate. A second plate is mounted on the side of the hinge block away from the first plate. The first plate contacts the outer wall of the hinge block. An installation groove is formed inside the first plate. The angle-locking multi-fin surfboard also includes a folding mechanism and a quick-change mechanism installed inside the first plate. Before surfing, the second plate can be manually released by sliding the ramp. Rotating the second plate causes the hinge block to rotate, folding the second plate in half with the first plate. This avoids the need for separate anti-collision space during storage and prevents the tail fins from scratching other objects during transport. It also reduces non-use wear and improves the overall durability and reliability of the structure.

Description

Technical Field

[0001] This invention relates to the field of multi-fin surfboard technology, specifically to an angle-locking multi-fin surfboard. Background Technology

[0002] The surfboard's tail fin mounting and angle adjustment structure design, especially for multi-fin surfboards, aims to achieve convenient adjustment and stable locking of the tail fin angle through an angle self-locking mechanism, improving the surfboard's maneuverability, stability, and adaptability under different wave conditions, and is suitable for professional competitive and recreational surfing scenarios.

[0003] Patent publication number CN212500920U relates to a surfboard body and a bottom plate layer and a protective layer disposed on both sides of the surfboard body. The surfboard body includes a first fiberglass layer disposed on the bottom plate layer, a foam board disposed on the first fiberglass layer, and a second fiberglass layer disposed on the foam board and connected to the protective layer. Multiple reinforcing ribs are disposed within the foam board. This device strengthens the bottom of the surfboard by providing a PC material bottom plate layer at the lower end of the surfboard body. A protective layer made of EVA or PE is disposed at the upper end of the surfboard body to protect the surface of the surfboard from damage caused by foot traffic. Fiberglass cloth is connected to both the upper and lower surfaces of the surfboard body, making the connection between the bottom plate layer and the surfboard body, and between the surfboard body and the protective layer, more stable. Reinforcing ribs made of fiberglass or carbon fiber rods are disposed within the foam board, making the surfboard body more stable and robust.

[0004] The device has fiberglass cloth on both the top and bottom, making the connection between the base layer and the surfboard body, and between the surfboard body and the protective layer more stable. Although the reinforcing ribs made of fiberglass or carbon fiber rods make the surfboard body more stable, the device is bulky when storing and transporting it, which can easily cause difficulties in handling and damage to the board surface during transport, thus increasing the overall safety risk. In addition, the entire device needs to be replaced after the tail fin is damaged, which increases the replacement time and cost. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an angle-locking multi-tail fin surfboard, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: an angle self-locking multi-tail fin surfboard, comprising a plate one, a hinge block rotatably mounted inside the plate one, a plate two mounted on the side of the hinge block away from the plate one, the plate one contacting the outer wall of the hinge block, and an installation groove opened inside the plate one; the angle self-locking multi-tail fin surfboard further includes a folding mechanism installed inside the plate one and a quick-change mechanism installed inside the plate one. The folding mechanism includes a fixed plate installed inside the second plate, a sliding plate installed inside the first plate, a limiting plate installed on the sliding plate, and an inclined plate installed on the side of the sliding plate away from the limiting plate. The outer wall of the fixed plate is in contact with the interior of the first plate. An inclined surface is provided on the fixed plate. The outer side of the inclined plate is in contact with the interior of the fixed plate. The outer wall of the inclined plate is in contact with the interior of the first plate. The outer side of the limiting plate is in contact with the interior of the first plate. A spring is installed between the limiting plate and the first plate. Before surfing, the limit of plate two can be released by manually sliding the ramp. At this time, plate two is rotated, which drives the hinge block to rotate, so that plate two and plate one are folded together. This avoids the need to reserve a separate space for anti-collision when storing, and also avoids the tail fin being easily scratched by other objects when carrying. At the same time, it reduces non-use wear and tear on the device and improves the durability and reliability of the overall structure.

[0007] The quick-change mechanism includes a left quick-change mechanism and at least one right quick-change mechanism that is spaced apart from the left quick-change mechanism, for quickly changing internal parts of the first plate.

[0008] Both the left and right quick-change mechanisms include a circular plate installed inside the first plate, a snap-fit ​​shell installed on the circular plate, a rotating plate installed inside the circular plate, an adjusting tail fin installed on the rotating plate, a circular rod installed inside the first plate, a trapezoidal plate installed on the circular rod, and a long plate installed on the side of the circular rod away from the trapezoidal plate.

[0009] During maintenance, simply pull the longboard to move it. The longboard moves the round rod, which in turn moves the trapezoidal board. The trapezoidal board then releases its restraints on the snap-fit ​​shell, allowing for quick assembly and disassembly of the tail fin. No tools are required; assembly and disassembly can be completed manually, greatly reducing the risk of board damage and extending the surfboard's lifespan.

[0010] The outer wall of the snap-fit ​​shell contacts the interior of the mounting groove of the first plate, the outer wall of the trapezoidal plate contacts the interior of the snap-fit ​​shell, the outer wall of the trapezoidal plate contacts the interior of the first plate, a spring is sleeved on the circumferential surface of the round rod, the outer wall of the long plate contacts the interior of the first plate, an inclined surface is provided on the trapezoidal plate, and an inclined surface is provided on the snap-fit ​​shell.

[0011] The multi-tailed fin surfboard also includes a self-locking mechanism installed inside the first plate, which is used to self-lock after adjusting the tail fin angle. The self-locking mechanism includes a locking block installed inside the first plate, a connecting plate installed on the locking block, and a slot formed on the rotating plate. A spring is provided between the locking block and the first plate. The outer wall of the locking block contacts the slot, the outer wall of the connecting plate contacts the interior of the first plate, and an inclined surface is provided on the locking block.

[0012] After the tail fin angle is adjusted, the locking block will be reset by the spring between it and plate one. The locking block will slide along the slot to lock the tail fin, preventing angle deviation and greatly improving the efficiency of wave condition switching. It is suitable for the immediate needs of outdoor surfing, and takes into account the quick adjustment of professional competition and the convenient use of recreational surfing.

[0013] The self-locking mechanism also includes a buffer deceleration mechanism installed inside the second plate, used to buffer and decelerate the second plate. The buffer deceleration mechanism includes a placement shell mounted on the second plate, a rotating cylinder mounted inside the placement shell, a pull rope mounted on the rotating cylinder, a pull handle mounted on the pull rope, a positioning block mounted inside the second plate, a buffer plate mounted on the positioning block, and a triangular block mounted on the buffer plate.

[0014] When surfing encounters a dangerous situation, the surfer pulls the handle, which moves the rope along the arm. The rope causes the shock absorber to slowly unfold, increasing the contact area with the seawater, thereby cushioning and slowing down the surfer. This significantly extends the overall lifespan of the tail fin, reduces structural maintenance costs, and allows the surfboard to maintain its preset handling characteristics even in complex wave conditions.

[0015] A torsion spring is provided between the rotating cylinder and the placement shell. The pull rope is in contact with the inside of the placement shell. The pull rope is in contact with the inside of the second plate. The buffer plate is in contact with the inside of the second plate. The pull rope is hinged to the inside of the triangular block. A torsion spring is provided between the positioning block and the buffer plate.

[0016] The multi-tailed fin surfboard also includes an anti-tipping mechanism installed on the second plate, which increases the area of ​​the second plate when decelerating; The anti-rollover mechanism includes a hinge rod installed on the buffer plate, a movable column installed inside the second plate, and a movable plate installed on the movable column. The side of the hinge rod away from the buffer plate is hinged to the movable plate. The movable plate is in contact with the interior of the second plate, and the hinge rod is in contact with the outer wall of the second plate.

[0017] While providing cushioning, the buffer plate moves the hinge rod, which in turn moves the moving plate, increasing the contact area between the moving plate and the seawater. This allows the buffer plate to decelerate and cushion the water, ensuring the stability of the second plate and keeping the board's center of gravity on a stable trajectory. This avoids sideslipping and tail-whipping during deceleration, significantly reducing the risk of loss of control and enhancing safety in all surfing scenarios. It also reduces the risk of losing balance and effectively reduces physical exertion.

[0018] The anti-tipping mechanism also includes an anti-slip mechanism installed on the second plate to prevent the feet from slipping during use. The anti-slip mechanism includes a foot pedal installed on the second plate, an anti-slip plate installed inside the foot pedal, a retractable plate installed on the anti-slip plate, and a guide plate installed on the second plate.

[0019] When surfing, the front foot is placed on the footboard, and the front foot pushes forward to move the footboard. The footboard moves the skid plate, which in turn moves the retractable board. The retractable board contacts the guide board, which in turn moves the skid plate towards the foot. This increases the friction between the foot and the surfboard, limiting the foot's irregular sliding on the board and keeping the surfer's center of gravity in the preset balance position of the board, ensuring the force balance of the multi-fin coordinated operation.

[0020] A spring is provided between the foot pedal and the second plate. The retractable plate is slidably embedded in the foot pedal. An inclined surface is provided on the retractable plate and an inclined surface is provided on the guide plate. The inclined surface of the retractable plate contacts the inclined surface of the guide plate.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, before surfing, the limiting position of the second plate can be released by manually sliding the ramp. At this time, rotating the second plate will cause the hinge block to rotate, thereby folding the second plate and the first plate together. This avoids the need to reserve a separate space for anti-collision during storage and prevents the tail fin from being easily scratched by other objects during carrying. It also reduces non-use wear and tear on the device and improves the durability and reliability of the overall structure. During maintenance, it is only necessary to pull the long board to move it. The long board moves the round rod, which in turn moves the trapezoidal plate. The trapezoidal plate releases the limiting position on the snap-fit ​​shell, thereby realizing the quick disassembly and assembly of the tail fin adjustment. No tools are required; disassembly and assembly can be completed manually, which greatly reduces the risk of damage to the board and extends the service life of the surfboard.

[0022] 2. In this invention, after the tail fin angle is adjusted, the locking block will be reset by the spring between it and plate one. The locking block will slide along the locking groove, thereby locking the tail fin and preventing angle deviation. This greatly improves the efficiency of wave condition switching, adapts to the immediate needs of outdoor surfing, and balances the rapid adjustment required for professional competition with the convenient use of recreational surfing. When surfing encounters a dangerous situation, the surfer pulls the handle, which moves the pull rope along the arm. The pull rope causes the buffer plate to slowly unfold, increasing the contact area with the seawater, thereby buffering and decelerating the surfboard. This significantly extends the overall lifespan of the tail fin, reduces structural maintenance costs, and allows the surfboard to maintain its preset control characteristics even in complex wave conditions.

[0023] 3. In this invention, while providing cushioning, the buffer plate moves the hinge rod, which in turn moves the moving plate, increasing the contact area between the moving plate and the seawater. This allows the buffer plate to decelerate and cushion, ensuring the stability of the second plate and keeping the board's center of gravity on a stable trajectory. This avoids sideslipping and tail-whipping during deceleration, significantly reducing the risk of loss of control and enhancing safety in all surfing scenarios. It reduces the risk of body imbalance and effectively reduces physical exertion. When surfing, the front foot is placed on the footboard, and pushing forward with the front foot moves the footboard, which in turn moves the anti-slip plate. The anti-slip plate then moves the retractable board. The contact between the retractable board and the guide plate causes the anti-slip plate to move towards the foot, increasing friction between the foot and the surfboard. This restricts irregular sliding of the foot on the board surface, keeping the surfer's center of gravity at a preset board balance position and ensuring the force balance of the multi-fin coordination. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the positional structure of section one and section two of the present invention; Figure 3 This is a schematic diagram showing the positional structure of the fixing plate and the inclined plate of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of the structural position at point A in the middle; Figure 5 This is a schematic diagram of the position structure of the rotating plate and the adjustable tail fin of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of the structural position at point B in the middle; Figure 7 This is a schematic diagram showing the position and structure of the card block and card slot of the present invention; Figure 8 This is a schematic diagram showing the position and structure of the pull rope and buffer plate in this invention; Figure 9 For the present invention Figure 8A magnified view of the positional structure at point C; a schematic diagram of the positional structure. Figure 10 This is a schematic diagram showing the positional structure of the hinge rod and the movable plate of the present invention; Figure 11 This is a schematic diagram showing the position and structure of the foot pedal and anti-slip plate of the present invention.

[0025] The meanings of the labels in the diagram are as follows: 1. Plate 1; 2. Hinge Block; 3. Plate 2; 4. Fixed Plate; 5. Sliding Plate; 6. Limiting Plate; 7. Inclined Plate; 8. Circular Plate; 9. Snap-fit ​​Shell; 10. Round Rod; 11. Trapezoidal Plate; 12. Long Plate; 13. Rotating Plate; 14. Adjustable Tail Fin; 15. Self-locking Mechanism; 151. Locking Block; 152. Connecting Plate; 153. Locking Slot; 154. Placement Shell; 155. Rotating Cylinder; 156. Pull Rope; 157. Pull Handle; 158. Positioning Block; 159. Buffer Plate; 1510. Triangular Block; 16. Anti-tipping Mechanism; 161. Hinge Rod; 162. Moving Column; 163. Moving Plate; 164. Foot Pedal; 165. Retractable Plate; 166. Anti-slip Plate; 167. Guide Plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1: Please see Figures 1-6 One embodiment of the present invention is: an angle self-locking multi-tail fin surfboard, including a plate 1, a hinge block 2 rotatably mounted inside the plate 1, a plate 3 mounted on the side of the hinge block 2 away from the plate 1, the plate 1 contacting the outer wall of the hinge block 2, and an installation groove opened inside the plate 1. The angle self-locking multi-tail fin surfboard also includes a folding mechanism installed inside the plate 1 and a quick-change mechanism installed inside the plate 1. The folding mechanism includes a fixed plate 4 installed inside plate 2 3, a sliding plate 5 installed inside plate 1, a limiting plate 6 installed on the sliding plate 5, and an inclined plate 7 installed on the side of the sliding plate 5 away from the limiting plate 6. The outer wall of the fixed plate 4 is in contact with the interior of plate 1. An inclined surface is provided on the fixed plate 4. The outer side of the inclined plate 7 is in contact with the interior of the fixed plate 4. The outer wall of the inclined plate 7 is in contact with the interior of plate 1. The outer side of the limiting plate 6 is in contact with the interior of plate 1. A spring is installed between the limiting plate 6 and plate 1. The quick-change mechanism includes a left quick-change mechanism and at least one right quick-change mechanism that is spaced apart from the left quick-change mechanism, for quick replacement of internal parts of panel 1.

[0028] Both the left quick-change mechanism and the right quick-change mechanism include a circular plate 8 installed inside plate 1, a snap-fit ​​shell 9 installed on the circular plate 8, a rotating plate 13 installed inside the circular plate 8, an adjusting tail fin 14 installed on the rotating plate 13, a circular rod 10 installed inside plate 1, a trapezoidal plate 11 installed on the circular rod 10, and a long plate 12 installed on the side of the circular rod 10 away from the trapezoidal plate 11.

[0029] The outer wall of the snap-fit ​​shell 9 is in contact with the inside of the mounting groove of plate 1, the outer wall of the trapezoidal plate 11 is in contact with the inside of the snap-fit ​​shell 9, the outer wall of the trapezoidal plate 11 is in contact with the inside of plate 1, a spring is sleeved on the circumferential surface of the round rod 10, the outer wall of the long plate 12 is in contact with the inside of plate 1, the trapezoidal plate 11 has a slope, and the snap-fit ​​shell 9 has a slope.

[0030] In this embodiment, when tourists go surfing, to facilitate carrying the surfboard, the ramp 7 can be manually slid. The ramp 7 moves the sliding plate 5, which in turn moves the limiting plate 6. The limiting plate 6 compresses the spring between itself and plate 1. At this time, plate 3 is rotated. The rotation of plate 3 causes the hinge block 2 to rotate via the hinge point, resulting in a 180-degree rotation of plate 3, folding it in half with plate 1. After folding, the limiting plate 6 is elastically reset by the spring between itself and plate 1. The limiting plate 6 then resets the sliding plate 5, which in turn resets the ramp 7. Upon reaching the beach, simply resetting plate 3 by rotating it 180 degrees causes the fixing plate 4 to rotate. 4. The rotation will cause the inclined plate 7 to contact the inclined plane 7 through the inclined plane, thereby compressing the inclined plate 7. The inclined plate 7 will push the sliding plate 5 to move. The sliding plate 5 will drive the limiting plate 6 to move. At this time, the limiting plate 6 will compress the spring again. When the inclined plate 7 enters the interior of the fixed plate 4, the limiting plate 6 will be reset again by the spring, thereby driving the inclined plate 7 to be reset again. This allows the inclined plate 7 to cooperate with the fixed plate 4 to complete the fixation between the second plate 3 and the first plate 1. This avoids the need to reserve a separate anti-collision space when storing, and the tail fin is easy to scratch with other objects when carrying. The storage and transportation volume is greatly reduced, and it can be adapted to regular backpacks and car storage spaces. No special storage box is required. It takes into account the outdoor mobility needs of professional surfers and the portable use needs of leisure users. It avoids physical damage and the intrusion of impurities, while reducing non-use wear of the device and improving the overall durability and reliability of the structure. When the tail fin 14 is damaged or needs repair, simply pull the long plate 12 to move it. The long plate 12 will then move the round rod 10, which in turn will move the trapezoidal plate 11. The movement of the trapezoidal plate 11 will release the limiting position on the locking housing 9. At this point, the round plate 8 can be moved manually. The round plate 8 will move the rotating plate 13, which will then remove the tail fin 14. A new round plate 8 can then be placed in the mounting slot. The movement of the round plate 8 will move the locking housing 9, which will then contact the inclined surface of the trapezoidal plate 11, thus pushing the trapezoidal plate 11 to move. 1. The round rod 10 moves, and at the same time, the trapezoidal plate 11 compresses the spring sleeved on the circumference of the round rod 10. The round rod 10 drives the long plate 12 to move. When the trapezoidal plate 11 enters the interior of the snap-fit ​​housing 9, the trapezoidal plate 11 will be reset by the spring sleeved on the circumference of the round rod 10. The reset trapezoidal plate 11 will be fixed with the round plate 8 of the snap-fit ​​housing 9, thereby realizing the quick disassembly and assembly of the tail fin 14. No tools are needed, and disassembly and assembly can be completed manually. The fin position can be adjusted at any time according to the changes in wave conditions, ensuring the overall disassembly and assembly efficiency of the equipment, greatly reducing the risk of damage to the board, and extending the service life of the surfboard.

[0031] Example 2: Please see Figures 7-9 Based on the above embodiments, in another embodiment of the present invention, the multi-tailed fin surfboard further includes a self-locking mechanism 15 installed inside the plate 1, which is used to self-lock after the angle of the adjustable tail fin 14 is adjusted. The self-locking mechanism 15 includes a locking block 151 installed inside the plate 1, a connecting plate 152 installed on the locking block 151, and a slot 153 opened on the rotating plate 13. A spring is provided between the locking block 151 and the plate 1. The outer wall of the locking block 151 contacts the slot 153, the outer wall of the connecting plate 152 contacts the interior of the plate 1, and a slope is opened on the locking block 151.

[0032] The self-locking mechanism 15 also includes a buffer deceleration mechanism installed inside the second plate 3, which is used to buffer and decelerate the second plate 3. The buffer deceleration mechanism includes a placement shell 154 mounted on plate 2 3, a rotating cylinder 155 mounted inside the placement shell 154, a pull rope 156 mounted on the rotating cylinder 155, a pull handle 157 mounted on the pull rope 156, a positioning block 158 mounted inside plate 2 3, a buffer plate 159 mounted on the positioning block 158, and a triangular block 1510 mounted on the buffer plate 159.

[0033] A torsion spring is provided between the rotating cylinder 155 and the placement shell 154. The pull rope 156 is in contact with the inside of the placement shell 154. The pull rope 156 is in contact with the inside of the second plate 3. The buffer plate 159 is in contact with the inside of the second plate 3. The pull rope 156 is hinged to the inside of the triangular block 1510. A torsion spring is provided between the positioning block 158 and the buffer plate 159.

[0034] In this embodiment, before surfing, the angle of the adjustable tail fin 14 needs to be adjusted. At this time, the circular plate 8 is installed inside the plate 1. The surfer can manually rotate the adjustable tail fin 14. Adjusting the tail fin 14 will drive the rotating plate 13 to rotate inside the circular plate 8. At the same time, the rotating plate 13 will drive the locking groove 153 to rotate. When the corresponding angle is reached, in order to prevent the angle from deviating during surfing, the rotating plate 13 needs to be self-locked. At this time, the locking block 151 will be reset by the spring between it and the plate 1. The locking block 151 will slide along the locking groove 153, thereby self-locking the adjustable tail fin 14. Pull the connecting plate 152 to move it. The connecting plate 152 drives the locking block 151 to move. The locking block 151 will release the compressed spring from the slot 153. At this time, continue to rotate the rotating plate 13 to adjust the angle of the tail fin 14. After releasing the locking block 151, it will be reset by the spring, thus completing the locking and adjustment of the rotating plate 13. This avoids the angle from becoming loose or shifting. The locking force of the simple buckle-type limit is insufficient and it is easy to deform under force, causing the tail fin angle to deviate. It can quickly adjust the angle and self-lock, greatly improving the operation efficiency of wave condition switching. It is suitable for the immediate needs of outdoor surfing and takes into account the quick adjustment of professional competition and the convenient use of recreational surfing. When surfing encounters a dangerous situation and requires deceleration and cushioning, the surfer can pull the handle 157. The handle 157 moves the pull rope 156 along the arm's direction, causing the rotating cylinder 155 to rotate. Simultaneously, pulling the pull rope 156, which extends outside the rotating cylinder 155, continues to move. At this time, the pull rope 156 rotates the triangular block 1510, which in turn rotates the buffer plate 159. The buffer plate 159 rotates along the axis of the positioning block 158, slowly unfolding to increase the contact area with the seawater, thereby cushioning and reducing the impact. When released, the rotating cylinder 155 will be reset by the spring between it and the housing 154. The rotating cylinder 155 drives the pull rope 156 to rotate and retract. The pull rope 156 will release the limit on the buffer plate 159. At the same time, the buffer plate 159 will be reset by the torsion spring between it and the positioning block 158. This avoids hard wear of the self-locking engagement part and deformation and loosening of the rotating shaft. It also prevents stress concentration and cracking of the fin body and the connection position, greatly extends the overall service life of the tail fin, reduces structural maintenance costs, and allows the surfboard to maintain the preset handling characteristics in complex wave conditions.

[0035] Example 3: Please see Figures 10-11 Based on the above embodiments, in another embodiment of the present invention, the multi-tailed fin surfboard further includes an anti-rollover mechanism 16 installed on the second plate 3, which is used to increase the area of ​​the second plate 3 when decelerating. The anti-rollover mechanism 16 includes a hinge rod 161 mounted on the buffer plate 159, a movable column 162 mounted inside the second plate 3, and a movable plate 163 mounted on the movable column 162. The side of the hinge rod 161 away from the buffer plate 159 is hinged to the movable plate 163. The movable plate 163 is in contact with the interior of the second plate 3, and the hinge rod 161 is in contact with the outer wall of the second plate 3.

[0036] The anti-rollover mechanism 16 also includes an anti-slip mechanism installed on plate 2 3 to prevent the feet from slipping during use; The anti-slip mechanism includes a foot pedal 164 installed on plate 2 3, an anti-slip plate 166 installed inside the foot pedal 164, a retractable plate 165 installed on the anti-slip plate 166, and a guide plate 167 installed on plate 2 3.

[0037] A spring is provided between the foot pedal 164 and the second plate 3. The retraction plate 165 is slidably embedded in the foot pedal 164. An inclined surface is provided on the retraction plate 165 and an inclined surface is provided on the guide plate 167. The inclined surface of the retraction plate 165 contacts the inclined surface of the guide plate 167.

[0038] In this embodiment, during operation: while buffering, the buffer plate 159 opens to decelerate, which drives the hinge rod 161 to move through the hinge point. The movement of the hinge rod 161 drives the moving plate 163 to move through the hinge point. The moving plate 163 drives the moving column 162 to slide out along the interior of the second plate 3, thereby increasing the contact area between the moving plate 163 and the seawater. This allows the buffer plate 159 to decelerate and buffer, ensuring the stability of the second plate 3 and keeping the center of gravity of the board on a stable trajectory. This avoids the problems of sideslipping and tail-whipping during deceleration, ensuring that surfers can accurately control the board's posture when decelerating, braking, and avoiding obstacles in an emergency. This significantly reduces the risk of loss of control and improves the safety of surfing in all scenarios. It reduces the risk of body imbalance and effectively reduces physical exertion, improving the comfort and endurance of surfing for a long time. While surfing, to increase friction with board 2 (3) and ensure stability, the front foot is placed on footboard 164. After placing it, the front foot pushes forward, moving footboard 164. Footboard 164 moves anti-slip plate 166, which in turn moves retractable plate 165. As retractable plate 165 moves, it contacts the inclined surface of guide plate 167. Sliding forward, retractable plate 165 retracts, causing anti-slip plate 166 to move towards the foot, thus increasing the friction between the foot and board. The stability between the two plates 3 is ensured by the spring between the foot pedal 164 and the two plates 3 when the foot leaves or releases the foot pedal 164. This causes the foot pedal 165 to move away from the inclined surface of the guide plate 167, thereby releasing the restriction on the foot. Increased friction and stability limit the irregular sliding of the foot on the board surface, keeping the surfer's center of gravity at the preset board balance position. The board can maintain a stable posture, ensuring that the self-locking multi-fin always bears the water flow load at the preset angle, and ensuring the force balance of the multi-fin coordination.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An angle-locking multi-tailed fin surfboard, comprising a first plate (1), wherein a hinge block (2) is rotatably mounted inside the first plate (1), and a second plate (3) is mounted on the side of the hinge block (2) away from the first plate (1), wherein the first plate (1) contacts the outer wall of the hinge block (2), and an installation groove is provided inside the first plate (1), characterized in that, The angle self-locking multi-tailed fin surfboard also includes a folding mechanism installed inside the first plate (1) and a quick-change mechanism installed inside the first plate (1). The folding mechanism includes a fixed plate (4) installed inside the second plate (3), a sliding plate (5) installed inside the first plate (1), a limiting plate (6) installed on the sliding plate (5), and an inclined plate (7) installed on the side of the sliding plate (5) away from the limiting plate (6). The outer wall of the fixed plate (4) is in contact with the interior of the first plate (1). An inclined surface is provided on the fixed plate (4). The outer side of the inclined plate (7) is in contact with the interior of the fixed plate (4). The outer wall of the inclined plate (7) is in contact with the interior of the first plate (1). The outer side of the limiting plate (6) is in contact with the interior of the first plate (1). A spring is installed between the limiting plate (6) and the first plate (1). The quick-change mechanism includes a left quick-change mechanism and at least one right quick-change mechanism that is spaced apart from the left quick-change mechanism, for quick replacement of internal parts of panel one (1).

2. The angle-locking multi-tail fin surfboard according to claim 1, characterized in that: Both the left quick-change mechanism and the right quick-change mechanism include a circular plate (8) installed inside the first plate (1), a snap-fit ​​shell (9) installed on the circular plate (8), a rotating plate (13) installed inside the circular plate (8), an adjusting tail fin (14) installed on the rotating plate (13), a circular rod (10) installed inside the first plate (1), a trapezoidal plate (11) installed on the circular rod (10), and a long plate (12) installed on the side of the circular rod (10) away from the trapezoidal plate (11).

3. The angle-locking multi-tail fin surfboard according to claim 2, characterized in that: The outer wall of the snap-fit ​​shell (9) is in contact with the interior of the mounting groove of plate one (1), the outer wall of the trapezoidal plate (11) is in contact with the interior of the snap-fit ​​shell (9), the outer wall of the trapezoidal plate (11) is in contact with the interior of plate one (1), a spring is sleeved on the circumferential surface of the round rod (10), the outer wall of the long plate (12) is in contact with the interior of plate one (1), the trapezoidal plate (11) has an inclined surface, and the snap-fit ​​shell (9) has an inclined surface.

4. The angle-locking multi-tail fin surfboard according to claim 2, characterized in that: The multi-tailed fin surfboard also includes a self-locking mechanism (15) installed inside the first plate (1) for self-locking after adjusting the angle of the tail fin (14); The self-locking mechanism (15) includes a locking block (151) installed inside the first plate (1), a connecting plate (152) installed on the locking block (151), and a slot (153) opened on the rotating plate (13). A spring is provided between the locking block (151) and the first plate (1). The outer wall of the locking block (151) contacts the slot (153), the outer wall of the connecting plate (152) contacts the interior of the first plate (1), and an inclined surface is provided on the locking block (151).

5. The angle-locking multi-tail fin surfboard according to claim 4, characterized in that: The self-locking mechanism (15) also includes a buffer deceleration mechanism installed inside the second plate (3) for buffering and decelerating the second plate (3); The buffer deceleration mechanism includes a placement shell (154) installed on the second plate (3), a rotating cylinder (155) installed inside the placement shell (154), a pull rope (156) installed on the rotating cylinder (155), a pull handle (157) installed on the pull rope (156), a positioning block (158) installed inside the second plate (3), a buffer plate (159) installed on the positioning block (158), and a triangular block (1510) installed on the buffer plate (159).

6. The angle-locking multi-tail fin surfboard according to claim 5, characterized in that: A torsion spring is provided between the rotating cylinder (155) and the placement shell (154). The pull rope (156) is in contact with the inside of the placement shell (154). The pull rope (156) is in contact with the inside of the second plate (3). The buffer plate (159) is in contact with the inside of the second plate (3). The pull rope (156) is hinged to the inside of the triangular block (1510). A torsion spring is provided between the positioning block (158) and the buffer plate (159).

7. The angle-locking multi-tail fin surfboard according to claim 5, characterized in that: The multi-tailed fin surfboard also includes an anti-rollover mechanism (16) installed on the second plate (3) to increase the area of ​​the second plate (3) when decelerating; The anti-rollover mechanism (16) includes a hinge rod (161) mounted on the buffer plate (159), a movable column (162) mounted inside the second plate (3), and a movable plate (163) mounted on the movable column (162). The side of the hinge rod (161) away from the buffer plate (159) is hinged to the movable plate (163). The movable plate (163) is in contact with the interior of the second plate (3), and the hinge rod (161) is in contact with the outer wall of the second plate (3).

8. The angle-locking multi-tail fin surfboard according to claim 7, characterized in that: The anti-rollover mechanism (16) also includes an anti-slip mechanism installed on the second plate (3) to prevent the feet from slipping during use; The anti-slip mechanism includes a foot pedal (164) installed on the second plate (3), an anti-slip plate (166) installed inside the foot pedal (164), a retractable plate (165) installed on the anti-slip plate (166), and a guide plate (167) installed on the second plate (3).

9. The angle-locking multi-tail fin surfboard according to claim 8, characterized in that: A spring is provided between the foot pedal (164) and the second plate (3). The shrink plate (165) is slidably embedded in the foot pedal (164). An inclined surface is provided on the shrink plate (165). An inclined surface is provided on the guide plate (167). The inclined surface of the shrink plate (165) is in contact with the inclined surface of the guide plate (167).

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