Inflatable catamaran

Abstract

The inflatable catamaran comprises a raft, side plates and a front vertical plate, independent air chambers are formed in the raft, the front side of the raft warps upwards in an arc mode to form a front warping part, a mounting support is arranged at the tail of the raft, the side plates are symmetrically arranged on the left board and the right board of the raft, and the front vertical plate is connected with the two side plates; the front warped part, the front vertical plate and the two side plates are enclosed through the boat belt awning to form a front sealed storage bin, the boat belt awning is obliquely arranged and connected with the front end of the front warped part and the top of the front vertical plate, and a front water retaining structure for preventing water from splashing is formed. The effective weight capable of being borne by the sealed storage bin is matched with the weight of driving equipment assembled on the mounting support, so that the gravity center of the whole ship body falls in a stable area in the length direction of the raft. The inflatable catamaran can be additionally provided with an anti-collision ring strip, a fishing rod base, an inflatable seat and other structures, the sailing stability, safety and fishing adaptability are further improved, meanwhile, a special dry storage space is provided for dry food, electronic equipment and fishing tools, damp damage is avoided, and the use experience is improved.

Description

Technical Field

[0001] This invention belongs to the field of catamaran technology, specifically relating to an inflatable catamaran. Background Technology

[0002] Catamarans are a type of vessel structure consisting of two single hulls fixed together by transverse connectors. Their unique catamaran layout gives them stronger resistance to wind and waves and better sailing stability compared to traditional monohull vessels (such as rafts). Compared to existing raft-like watercraft, they also have significant advantages in terms of load-bearing capacity and smoothness of navigation. Therefore, they are widely used in water sightseeing, leisure and entertainment scenarios, and are especially suitable as a dedicated carrier for water fishing.

[0003] In practical applications of recreational fishing, existing catamarans typically mount their propulsion systems (including electric and hydraulic motors) at the stern to meet the vessel's power requirements. However, this stern-driven layout has significant technical drawbacks: Firstly, the propulsion system itself is heavy, and its concentrated installation at the stern shifts the vessel's center of gravity aft, creating an imbalance that severely compromises stability during navigation. This not only affects the safety of fishing operations but may also exacerbate swaying in rough seas. Secondly, as speed increases, the bow generates a large amount of splashing water, which can easily seep into the hull or splash onto passengers, negatively impacting the user experience. Furthermore, existing catamarans for fishing lack dedicated dry storage areas. Dry food, electronic equipment (such as fishing detectors and communication devices), and fishing gear (such as bait) require safe storage and are susceptible to moisture damage from water ingress or splashing, further affecting the user experience and the smooth operation of fishing activities.

[0004] Given the shortcomings of the existing technologies, there is an urgent need for a catamaran structure that can solve the problems of center of gravity imbalance, water splashing, and dry storage, so as to better adapt to the usage needs of recreational scenarios such as water fishing. Summary of the Invention

[0005] To address the problems and shortcomings of the existing technology, this invention provides an inflatable catamaran. Its core feature is that the front side of the raft board is designed as an arc-shaped forward-curved section, which is combined with a boat canopy that connects the forward-curved section and the front upright plate to form an efficient front water-blocking structure. This structure can directly block splashing water from the front, preventing it from rushing into the hull or wetting the personnel. At the same time, the forward-curved section, the front upright plate, and the side plates enclose a front-mounted sealed storage compartment, which is specifically used to store dry food, electronic equipment, and fishing gear, preventing them from being damaged by moisture.

[0006] More importantly, by matching the weight of the sealed storage compartment with that of the stern drive system, the overall center of gravity of the hull is stably positioned in the middle of the raft's length, completely eliminating the imbalance problem caused by the stern drive. Furthermore, auxiliary structures such as anti-collision and air pressure monitoring can be added as needed to further enhance navigation safety and durability, making it fully adaptable to recreational scenarios such as fishing and significantly improving the user experience and operational safety.

[0007] This invention is achieved through the following technical solution: An inflatable catamaran includes a raft deck, side plates, and a forward upright plate that form independent air chambers inside. The front side of the raft deck curves upward in an arc to form a forward upturned part. The stern of the raft deck is provided with an installation bracket. The side plates are symmetrically arranged on the left and right sides of the raft deck. The forward upright plate connects the two side plates. The front upturned section, the front upright plate, and the two side plates are enclosed by the boat belt canopy to form a front-mounted sealed storage compartment. The boat belt canopy is inclined and connects the front end of the front upturned section and the top of the front upright plate to form a front water barrier structure to prevent water from splashing. The effective weight W1 that the sealed storage compartment can bear and the weight W2 of the drive equipment mounted on the mounting bracket satisfy 0.8W2≤W1≤1.2W2, so that the overall center of gravity of the hull falls in the area of ​​1 / 3 to 2 / 3 of the length of the raft plate.

[0008] The upward-curving section at the front of the raft deck, together with the awning that is inclined and connects the front end of the curve to the top of the foreboard, forms a front water-blocking structure. This effectively intercepts splashing water generated in front of the hull during navigation, significantly reducing water inflow into the hull and splashing onto the crew, thus significantly improving the dryness of the hull and the comfort of the crew during navigation. The foreboard section, the foreboard, and the two symmetrically positioned side panels on the port and starboard sides of the raft deck form a front-mounted sealed storage compartment. This compartment provides dedicated dry storage space for items such as dried food, electronic devices, and fishing gear, effectively isolating them from external moisture and preventing damage or malfunction due to dampness, ensuring the smooth operation of recreational activities such as fishing. The mounting bracket at the stern of the raft is used to assemble the drive equipment. The design of the sealed storage compartment to support the effective weight and match the weight of the drive equipment can keep the overall center of gravity of the hull stable within a stable area along the length of the raft. This fundamentally solves the problem of the center of gravity shifting backward in traditional catamarans due to the drive equipment being concentrated at the stern. It reduces the swaying amplitude of the hull during navigation, improves navigation stability and the safety of fishing operations, and ensures that the hull can maintain a balanced state under different working conditions such as stationary, navigation and fishing operations.

[0009] Furthermore, the catamaran also includes anti-collision rings continuously arranged along the circumference of the outer side of the hull. The anti-collision rings are made of highly elastic and wear-resistant rubber and continuously wrap around the front end face of the raft deck and the outer side walls of the two side plates. The cross-section of the anti-collision rings is semi-circular.

[0010] The anti-collision rings, continuously installed circumferentially along the outer side of the hull, possess excellent impact absorption and wear resistance thanks to their highly elastic and wear-resistant rubber material. In the event of a collision with an external object, the high elasticity of the material effectively buffers the impact force, preventing it from being directly transmitted to the hull's main structure, such as the deck and side plates, thus preventing damage such as breakage or deformation. The wear resistance extends the service life of the anti-collision rings themselves, reducing wear and replacement frequency during daily use and lowering maintenance costs. The anti-collision rings continuously wrap around the front face of the forward-curved section of the deck and the outer walls of the two side plates, covering key areas prone to collisions during navigation, such as reefs, dock edges, and other vessels, forming a full-circumferential protective barrier and comprehensively reducing the risk of collision damage to the hull. Simultaneously, the cross-sectional design of the anti-collision rings ensures sufficient structural strength for the anti-collision function while optimizing the hydrodynamic performance of the hull's outer side, reducing water resistance interference during navigation, and not affecting the hull's normal navigation efficiency, achieving synergistic optimization of protective and navigation performance.

[0011] Furthermore, the height of the front upright is 1.2 to 1.8 times the height of the side panels; support ribs are provided on the inner side of the front upright and between the two side panels.

[0012] The height-adaptive design of the foreboard and side panels, by increasing the height of the foreboard, further enhances the overall blocking height of the forward water deflector. This more effectively intercepts splashing water from higher positions ahead during navigation, preventing water from exceeding the height of the foreboard water deflector and entering the hull. This significantly enhances the splash protection effect, providing more comprehensive protection for the internal environment and personnel. Supporting ribs located on the inner side of the foreboard and between the two side panels greatly strengthen the structural connection strength and stability between the foreboard and side panels. This effectively resists the forces exerted on the connection point by water flow impacts, hull rolling, and external collisions during navigation, preventing deformation, loosening, or cracking at the connection. This reinforced structural design not only ensures the reliability of the connection between the foreboard and side panels but also maintains the sealing performance of the forward-mounted sealed storage compartment. This prevents external water from seeping into the storage compartment due to seal failure at the connection point, ensuring the dryness and safety of stored items and extending the service life of the overall hull structure.

[0013] Furthermore, the lower ends of both side plates are detachably connected to the left and right side edges of the raft plate via sealed quick-release connectors. The boat has a waterproof zipper at the connection between the canopy and the front upright, which is used to control the opening and closing of the storage compartment.

[0014] The lower ends of the two side panels are detachably connected to the left and right sides of the raft deck via sealed quick-release connectors. This design combines sealing and convenience. The sealed structure ensures excellent waterproof performance at the connection between the side panels and the raft deck, preventing water from seeping into the hull during navigation and maintaining the hull's waterproof reliability. The quick-release feature facilitates disassembly of the hull during transportation and storage, reducing overall space occupation, transportation difficulty, and storage costs. It also facilitates subsequent individual maintenance, inspection, or replacement of the side panels or raft deck, improving the hull's flexibility. A waterproof zipper at the connection between the awning and the foreboard allows for easy opening and closing of the front-mounted sealed storage compartment. Users can quickly open or close the storage compartment without additional tools, facilitating the storage and retrieval of items and improving usability. At the same time, the sealing structure of the waterproof zipper effectively prevents external water from entering the storage compartment through the connection, ensuring that the interior of the storage compartment always remains dry. This balances the practicality and sealing of the storage compartment, meeting the storage and protection needs of different usage scenarios.

[0015] Furthermore, at least two fishing rod bases are symmetrically provided on the upper surface of the raft board along the width direction, and at least two sets of elastic ropes are also provided on the upper surface of the raft board; a measuring ruler is also attached to the surface of the raft board, and the scale lines of the measuring ruler are treated with an anti-slip and scratch-resistant coating.

[0016] The symmetrically arranged rod holders on the upper surface of the raft deck provide stable mounting points for fishing rods, accommodating multiple rods simultaneously. This prevents rods from tipping over, sliding, or falling due to boat movement, ensuring stability and adapting to multi-rod fishing scenarios. Elastic ropes on the upper surface of the raft deck can be used to secure various fishing supplies (such as bait boxes, landing nets, etc.) and the caught fish. The elasticity firmly fixes these items to the raft deck surface, preventing them from slipping into the water during boat movement, ensuring safety and minimizing unnecessary losses. The measuring ruler attached to the raft board provides users with a convenient tool for measuring dimensions. The size of the catch can be measured directly on the hull without the need to carry additional special measuring instruments, simplifying the fishing operation process. The scale lines of the measuring ruler are treated with a non-slip and scratch-resistant coating, which can resist friction, scratches and water erosion in daily use, maintain clear and readable scale lines, extend the service life of the measuring ruler, ensure measurement accuracy in long-term use, and fully adapt to the practical needs of fishing scenarios. Furthermore, the catamaran also includes inflatable seats that can be detachably installed between the two side panels, with the inflatable seats located behind the storage compartment along the length of the raft panels.

[0017] The inflatable seat, detachable and installed between the two side panels, forms an ergonomic support structure when inflated, providing a comfortable seating experience, effectively distributing body pressure, reducing fatigue during long fishing trips, and improving overall user comfort. The detachable nature of the inflatable seat allows users to flexibly adjust it according to actual needs. When not in use, it can be deflated and stored away, reducing its footprint inside the hull and preventing it from affecting movement within the hull. The number of seats can also be increased or decreased to accommodate single, double, or multi-person use, enhancing the hull's flexibility and adaptability. Along the length of the raft deck, the inflatable seat is located behind the storage compartment. This layout makes efficient use of the hull's internal space, preventing the seat from encroaching on the front-mounted sealed storage compartment and ensuring its storage function remains unaffected. Simultaneously, this position ensures users have a good view while seated, facilitating observation of the surrounding waters and fishing spots without compromising fishing convenience, achieving a balance between seating comfort and practical functionality.

[0018] Furthermore, the front panel is equipped with an alarm with audible and visual alarm functions, and at least one air pressure detector is installed in the air chamber of the raft plate, the air chambers of the two side plates, and the air chamber of the front panel. Each air pressure detector is connected to the alarm signal, and each air pressure detector has a preset air pressure threshold. When the actual air pressure in any air chamber is lower than the air pressure threshold, the air pressure detector triggers the alarm to emit an audible and visual alarm signal.

[0019] An alarm with audible and visual alarm functions, installed on the forward upright, forms a linked monitoring system with corresponding air pressure detectors installed in the air chambers of the raft deck, the two side panels, and the forward upright. This system can monitor the air pressure status of each independent air chamber in the hull in real time. The air pressure detectors continuously capture air pressure changes in each air chamber, promptly detecting abnormalities such as air leaks and pressure drops, preventing problems such as reduced buoyancy and structural stability due to insufficient air pressure. When the actual air pressure in any air chamber falls below a preset air pressure threshold, the air pressure detector will immediately trigger the alarm, emitting an audible and visual alarm signal. This dual sound and light alert ensures that users can quickly detect the abnormality and take timely countermeasures, such as checking for leaks and repairing them, or replenishing gas. This effectively prevents the risk of instability, tilting, or even sinking due to abnormal air pressure in the air chambers, significantly improving the safety and reliability of the hull and providing stable safety assurance for water activities.

[0020] Furthermore, at least one set of slide rails is fixedly installed at the bottom of the storage compartment along the length of the raft deck, and a counterweight storage box is slidably mounted on the slide rails. A drive motor and a balance sensor for detecting the tilt angle of the hull are also fixedly installed inside the storage compartment. The drive motor is connected to the counterweight storage box via a transmission assembly. The drive motor drives the counterweight storage box to move back and forth along the slide rail. The drive motor establishes a data communication connection with the balance sensor, and the balance sensor is preset with a hull balance reference threshold. When the balance sensor detects that the hull tilt angle exceeds the reference threshold, the drive motor drives the counterweight storage box to move along the slide rail. The center of gravity shift is compensated in real time by adjusting the front and rear position of the counterweight storage box.

[0021] A slide rail fixedly installed at the bottom of the storage compartment along the length of the raft deck provides a stable sliding track for the counterweight storage box, ensuring its smooth movement along a preset direction. The counterweight storage box, slidably mounted on the slide rail, can change the ship's center of gravity distribution by adjusting its position. Combined with a drive motor and balance sensor fixedly installed inside the storage compartment, this forms a dynamic center of gravity compensation system. The balance sensor can detect the ship's tilt angle in real time, accurately determining whether the ship has deviated from its balanced state. The drive motor, connected to the counterweight storage box via a transmission assembly, drives the counterweight storage box to move back and forth along the slide rail based on the detection results from the balance sensor. When the balance sensor detects that the ship's tilt angle exceeds the preset ship balance reference threshold, the drive motor immediately starts and adjusts the position of the counterweight storage box, compensating for the ship's center of gravity shift in real time by changing the counterweight distribution, quickly restoring the ship to a balanced state. The system can effectively cope with temporary center of gravity imbalance caused by various factors such as wind and waves, personnel movement, and changes in the location of fish storage, greatly improving the navigation stability and anti-interference ability of the hull in complex water environments, and ensuring the smooth and safe operation of fishing and other activities.

[0022] Furthermore, at least two detachable fin plates are symmetrically provided on the lower surface of the tail of the raft plate along the width direction, and the extension direction of the fin plates is consistent with the length direction of the raft plate.

[0023] The fins, symmetrically arranged along the width of the raft's lower stern surface and extending in the same direction as the raft's length, guide the water flow during navigation, optimizing the flow pattern at the stern and enhancing the raft's directional stability. The fins reduce lateral drift and course deviation, allowing for precise control and improved maneuverability, especially in fast-flowing or calm waters. The fins are detachable, allowing users to choose whether to install them based on the specific water conditions: removing them reduces water resistance and improves efficiency in calm waters, while installing them enhances stability and reduces navigational risks in turbulent or rough waters. This design improves the raft's adaptability to different water environments and facilitates the storage and transport of the fins, minimizing space usage and reducing operating costs when not in use.

[0024] Furthermore, the inner side of the front upright, the top of the two side panels, and the front end of the raft board are all equipped with anti-slip handles. The inner side of the front upright is detachably fitted with an elastic drawstring net. The inner walls of the two side panels are equipped with fishing brackets for temporarily supporting spare fishing rods or for rod support needs to be adapted to different fishing positions.

[0025] Anti-slip handles are located on the inner side of the foreboard, the top of the two sideboards, and the front of the raft board, providing users with stable grip points. When boarding or disembarking, these handles act as support points, helping users maintain balance and preventing slips due to boat movement or slippery surfaces. During navigation or fishing, when the boat rocks, users can grip the handles to stabilize their posture, improving operational safety and reducing the risk of accidental falls. The inner side of the foreboard features a detachable, elastic-closing net bag with flexible storage capabilities. This bag can be used to store small items commonly used during fishing, such as bait boxes, mobile phones, and keys. The elastic closure tightly wraps items, preventing them from falling out and ensuring their safety. Its detachable nature allows users to install or remove the net bag as needed, flexibly utilizing the boat's internal space and enhancing usability. The fishing brackets installed on the inner walls of the two side panels provide temporary support for spare fishing rods, preventing them from being damaged or slipping due to careless placement. At the same time, the angle of the fishing rod can be adjusted according to different fishing positions to meet the needs of multi-directional fishing. Users do not need to hold the spare fishing rod, reducing the burden of operation and improving the convenience and flexibility of fishing operations, making it suitable for diverse fishing scenarios.

[0026] The beneficial effects of this invention are: In terms of center of gravity balance, the drive equipment is mounted on the stern bracket of the raft board. Together with the front-mounted sealed storage compartment, it can accurately match the effective weight with the weight of the drive equipment, and keep the overall center of gravity of the boat stable in the stable area along the length of the raft board. This fundamentally solves the problem of the center of gravity shifting backward caused by traditional stern drive. At the same time, the dynamic center of gravity compensation system composed of the sliding rail, counterweight storage box, drive motor and balance sensor in the storage compartment can respond in real time to temporary center of gravity imbalance caused by factors such as wind, waves and personnel movement, further improving the navigation stability of the boat under different working conditions, reducing the swaying amplitude and ensuring the safety of fishing operations.

[0027] For splash protection, the forward-curved section of the raft deck and the inclined boat awning form a front water-blocking structure. Combined with the reinforced structural stability of the forward upright plate, which is higher than the side plates, and the supporting ribs, this effectively intercepts splashing water from different heights in front of the raft during navigation, preventing water from entering the hull or splashing onto the crew, thus maintaining a dry interior and crew comfort. The dry storage function is achieved through a front-mounted, sealed storage compartment enclosed by the forward-curved section, forward upright plate, side plates, and boat awning. With the waterproof zipper connecting the boat awning and forward upright plate, it provides a dedicated dry space for dried food, electronic devices, and fishing gear, isolating them from external moisture to prevent damage. It also allows for easy opening and closing for convenient access, meeting the storage needs of fishing scenarios.

[0028] To adapt to various fishing scenarios, the symmetrically arranged rod bases on the raft can stably support multiple fishing rods, while elastic ropes can secure fishing gear and catches. The non-slip, scratch-resistant measuring ruler attached to the surface makes it easy to measure the size of the catch. The fishing brackets on the inner side panels can accommodate rod mounting needs in different positions, and the elastic drawstring net pocket on the inner side of the front panel is convenient for storing small items. The detachable inflatable seat provides an ergonomic seating experience, reducing fatigue during long fishing trips, and comprehensively optimizing the convenience and comfort of fishing operations.

[0029] In terms of safety, the independent air chamber design of the raft deck, side panels, and foreboard enhances anti-sinking resistance. Each air chamber is equipped with a pressure detector that works in conjunction with the audible and visual alarm on the foreboard to monitor abnormal pressure in real time and issue timely warnings, preventing instability caused by air leaks. High-elasticity, wear-resistant anti-collision rings around the hull buffer impacts and cover vulnerable areas to protect the hull structure. Anti-slip handles on the inner side of the foreboard, the top of the side panels, and the front of the raft deck facilitate gripping and reduce the risk of falls during swaying. Regarding structural durability and portability, the side panels are detachably connected to the raft deck via sealed quick-release connectors. Components such as the fins and inflatable seats also feature a detachable design, facilitating disassembly for transport and storage, reducing space occupation and transportation costs, and allowing for flexible adjustment of component assembly for different water environments. Simultaneously, structural reinforcement designs such as supporting ribs and sealed connections extend the hull's lifespan, achieving a highly efficient balance between practicality and flexibility. This comprehensively adapts to the diverse needs of recreational activities such as fishing, significantly enhancing the overall user experience and product competitiveness. Attached Figure Description Figure 1 A schematic structural diagram illustrating one embodiment of an inflatable catamaran in this invention; Figure 2 A front view illustrating an illustrative embodiment of an inflatable catamaran according to the present invention; Figure 3 A top view illustrating a schematic embodiment of an inflatable catamaran in this invention; Figure 4A front sectional view illustrating an illustrative embodiment of an inflatable catamaran according to the present invention; Figure 5 A front sectional view illustrating another illustrative embodiment of an inflatable catamaran in this invention; Figure 6 A side sectional view illustrating an illustrative embodiment of an inflatable catamaran according to the present invention.

[0030] List of components and reference numerals: 1. Raft board; 11. Front tilt section; 12. Mounting bracket; 13. Fishing rod base; 14. Elastic rope; 15. Measuring ruler; 16. Fin plate; 2. Side plate; 21. Fishing bracket; 3. Front upright plate; 31. Support rib plate; 32. Net bag; 4. Boat with canopy; 41. Waterproof zipper; 5. Storage compartment; 51. Slide rail; 52. Counterweight storage box; 53. Drive motor; 54. Balance sensor; 6. Circular anti-collision strip; 7. Inflatable seat; 8. Non-slip handle. Detailed Implementation

[0031] 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.

[0032] It should be noted that the directional terms such as left, right, up, down, front, and back in the embodiments of the present invention are only relative concepts or are based on the normal use state of the product, i.e., the direction of the product's movement, and should not be considered as limiting.

[0033] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention refer not only to changes in position, but also to movements such as rotation and rolling in which the position does not change relative to the position, but the state changes.

[0034] Finally, it should be noted that when a component is said to be "located on" or "set on" another component, it can be on the other component or may have an intervening component at the same time. When a component is said to be "connected to" another component, it can be directly connected to the other component or may have an intervening component at the same time.

[0035] like Figures 1 to 6The inflatable catamaran shown here addresses the core issues of existing catamarans, such as unbalanced center of gravity, water splashing, and lack of dry storage space. Through the collaborative design of multiple technical features, it constructs an efficient, stable, and safe hull structure suitable for recreational activities such as fishing. Its overall technical solution encompasses multiple dimensions, including main structure, center of gravity balance, splash protection, collision protection, fishing suitability, safety assurance, convenient assembly and disassembly, and detailed optimizations. Specific details are as follows: The catamaran comprises a raft deck 1, side plates 2, and a forward upright 3, each with its own independent air chamber. These three elements together form the basic framework of the hull. The independent air chamber design enhances the hull's resistance to sinking and prevents overall hull instability caused by the failure of a single air chamber. The raft deck 1 serves as the load-bearing foundation of the hull, with its forward side curving upwards to form a forward upturned section 11. This upturned section 11 not only optimizes the hydrodynamic performance of the hull's forward end but also helps to block water from the front. A mounting bracket 12 is fixedly installed at the stern of the raft deck 1, used to assemble the drive equipment and provide propulsion for the hull. The side plates 2, serving as lateral support structures, are symmetrically positioned on both sides of the raft deck 1 and are securely connected to it via a specific connection method. This enhances the hull's lateral stability and provides a mounting base for other functional components. The forward upright 3 laterally connects the two side plates 2, forming a lateral support at the front of the hull. It also works in conjunction with the forward upturned section 11 and side plates 2 to create functional spaces. Together, these three elements ensure the integrity and stability of the main hull structure.

[0036] To achieve the dual functions of dry storage and splash protection, a front-mounted sealed storage compartment 5 is formed by the coordinated operation of the front upturned part 11, the front upright plate 3, and the two side plates 2, combined with the boat awning 4. The boat awning 4 is inclined, with one end connected to the front end of the front upturned part 11 and the other end connected to the top of the front upright plate 3. This inclined layout not only makes the boat awning 4 and the front upturned part 11 form a front water-blocking structure to prevent water splashing, but also ensures the airtightness of the storage compartment 5 through its enclosed shape. The front-mounted sealed storage compartment 5 provides dedicated storage space for dried food, electronic devices, fishing gear, and other items needed during fishing, effectively isolating them from external moisture. At the same time, to further optimize the ease of use of the storage compartment 5, a waterproof zipper 41 is provided at the connection between the boat awning 4 and the front upright plate 3. The waterproof zipper 41 ensures the sealing and waterproof performance of the storage compartment 5, while also allowing for convenient opening and closing of the storage compartment 5, facilitating quick access for users to store and retrieve items, thus balancing airtightness and practicality.

[0037] To address the issue of center-of-gravity imbalance in existing catamarans caused by the concentration of drive equipment at the stern, the technical solution constructs a center-of-gravity balancing system from two aspects: basic counterweight and dynamic compensation. On one hand, by controlling the matching relationship between the effective weight that the front-mounted sealed storage compartment 5 can bear and the weight of the drive equipment mounted on the mounting bracket 12, the overall center of gravity of the hull is ensured to fall within a stable area along the length of the raft plate 1, fundamentally solving the problem of rearward center-of-gravity shift, reducing the swaying amplitude during navigation, and ensuring the safety of fishing operations. On the other hand, to cope with temporary center-of-gravity imbalances caused by factors such as wind and waves, excessive boat speed, personnel movement, and changes in the location of fish storage, at least one set of slide rails 51 is fixedly installed at the bottom of the storage compartment 5 along the length of the raft plate 1. A counterweight storage box 52 is slidably mounted on the slide rails 51. Simultaneously, a drive motor 53 and a balance sensor 54 for detecting the hull's tilt angle are also fixedly installed inside the storage compartment 5. The drive motor 53 is connected to the counterweight storage box 52 through a transmission component, and can drive the counterweight storage box 52 to move back and forth along the slide rail 51. The drive motor 53 establishes a data communication connection with the balance sensor 54. The balance sensor 54 is preset with a hull balance reference threshold. When the balance sensor 54 detects that the hull tilt angle exceeds the reference threshold, the drive motor 53 will immediately drive the counterweight storage box 52 to move along the slide rail 51. By adjusting the front and rear position of the counterweight storage box 52, the center of gravity shift is compensated in real time to ensure that the hull always maintains a balanced state.

[0038] In terms of splash protection, in addition to the front water-blocking structure formed by the forward-curved part 11 and the boat canopy 4, the technical solution also upgrades the splash protection effect by optimizing the height of the front upright plate 3. The height of the front upright plate 3 is higher than that of the side plate 2, which can further increase the blocking height of splashing water and prevent water from entering the hull due to excessive height and passing over the front water-blocking structure. At the same time, there are supporting ribs 31 between the inner side of the front upright plate 3 and the two side plates 2. The supporting ribs 31 can not only enhance the connection strength and structural stability between the front upright plate 3 and the side plate 2 and prevent deformation at the connection point during navigation or collision, but also maintain the sealing performance of the front-mounted sealed storage compartment 5 to ensure the stable operation of splash protection and storage functions.

[0039] In terms of collision protection, collision protection rings are continuously installed along the outer circumference of the hull. These rings are made of highly elastic and wear-resistant rubber, and their material properties give them excellent impact absorption and wear resistance. They can buffer the impact force when the hull collides with external objects, preventing damage to the main structure of the hull. The collision protection rings continuously wrap around the front end face of the forward curved part 11 of the raft plate 1 and the outer side walls of the two side plates 2, covering the key areas where the hull is prone to collision with the outside world during navigation, forming a full-circumferential collision barrier. At the same time, the cross-section of the collision protection rings has a specific shape, which not only ensures sufficient structural strength to achieve the collision protection function, but also optimizes the hydrodynamic performance of the outer side of the hull, reduces water resistance interference during navigation, and achieves synergistic optimization of protection performance and navigation performance.

[0040] To precisely meet the needs of water fishing, multiple fishing adaptation structures are set in various parts of the hull. On the upper surface of the raft plate 1, at least two fishing rod bases 13 are symmetrically arranged along the width direction. The fishing rod bases 13 provide stable mounting points for fishing rods, which can meet the needs of multiple fishing rods being used at the same time, and prevent the fishing rods from tipping over, sliding or falling off due to the swaying of the hull during fishing. The upper surface of the raft plate 1 is also equipped with at least two sets of elastic ropes 14. The elastic ropes 14 can use their own elasticity to tie and fix fishing gear or catches, preventing them from slipping into the water when the hull sways. The surface of the raft plate 1 is also attached with a measuring ruler 15. The scale lines of the measuring ruler 15 are treated with a non-slip and scratch-resistant coating, which not only makes it convenient for users to measure the size of the catch directly on the hull, but also resists friction, scratches and water erosion in daily use, and maintains the clear readability of the scale lines. On the inner sides of the side panels 2 and the front upright panel 3, auxiliary fishing structures are also provided: fishing brackets 21 are provided on the inner walls of both side panels 2. The fishing brackets 21 can be used to temporarily support spare fishing rods, or the rod angle can be adjusted according to the needs of the fishing position to adapt to the fishing habits of different waters; an elastic drawstring net bag 32 can be detachably installed on the inner side of the front upright panel 3. The elastic drawstring net bag 32 can store small items such as bait boxes and mobile phones, which are convenient for users to access at any time. At the same time, the detachable design makes it easy to clean and replace the net bag 32. In addition, the catamaran also includes an inflatable seat 7, which can be detachably installed between the two side panels 2. Along the length of the raft board 1, the inflatable seat 7 is located behind the storage compartment 5. It does not take up storage space and provides users with an ergonomic seating experience, reducing physical fatigue during long fishing sessions and improving overall fishing comfort.

[0041] To enhance the safety of the catamaran's navigation, a multi-dimensional safety system has been constructed. Firstly, an alarm with audible and visual alarm functions is installed on the forward upright plate 3. Simultaneously, at least one air pressure detector is installed in each of the air chambers of the raft plate 1, the two side plates 2, and the forward upright plate 3. Each air pressure detector is connected to the alarm signal, and each detector has a preset air pressure threshold. When the actual air pressure in any air chamber falls below the threshold, the air pressure detector immediately triggers the alarm, emitting an audible and visual alarm signal, reminding the user to check the air chamber status and take repair or refilling measures to prevent air leakage from causing a decrease in buoyancy and structural stability. Secondly, anti-slip handles 8 are provided on the inner side of the forward upright plate 3, the top of the two side plates 2, and the front end of the raft plate 1. These handles facilitate gripping when boarding and disembarking and provide stable support points when the hull sways, reducing the risk of falls and further enhancing safety.

[0042] To improve the ease of transportation and storage of the hull, the technical solution adopts several detachable designs: the lower ends of the two side plates 2 are detachably connected to the left and right sides of the raft plate 1 through sealed quick-release connectors. The sealed quick-release connectors not only ensure the waterproof performance of the connection between the side plates 2 and the raft plate 1, but also enable the quick disassembly and assembly of the side plates 2 and the raft plate 1, reducing the overall space occupied by the hull and lowering transportation and storage costs; at the same time, components such as the inflatable seat 7 and the fin plate 16 also adopt detachable designs, allowing users to flexibly adjust the assembly state of the components according to actual usage needs, enhancing the flexibility of the hull's use.

[0043] Regarding the optimization of the stern structure of raft plate 1, at least two detachable fin plates 16 are symmetrically provided on the lower surface of the stern along the width direction. The extension direction of the fin plates 16 is consistent with the length direction of raft plate 1. The fin plates 16 can guide the water flow during the hull's navigation, enhance the hull's directional stability, reduce side drift, and reduce the magnitude of directional deviation. The detachable design allows users to choose whether to install them according to the environmental characteristics of the navigation waters. Removing the fin plates 16 in calm waters can reduce water resistance and improve navigation efficiency, while installing the fin plates 16 in turbulent waters or waters with large waves can enhance the hull's stability and adapt to the navigation needs of different waters.

[0044] In summary, this inflatable catamaran technology solution achieves a comprehensive effect through the synergistic combination of the above-mentioned technical features, including stable center of gravity balance, effective splash protection, reliable dry storage, strong adaptability to fishing, comprehensive safety assurance, and convenient and flexible assembly and disassembly. It fully solves the technical pain points of existing catamarans and provides an efficient, stable, and safe hull solution for recreational scenarios such as fishing.

[0045] In one embodiment, in a catamaran application specifically designed for multi-scenario fishing and recreational use, the core frame of the hull consists of a raft plate 1, side plates 2, and a forward upright plate 3, each with an independent internal air chamber. These three components achieve structural stability and functional synergy through modular design. The raft plate 1 serves as the load-bearing foundation, with its front side arcing upwards to form a forward upturned section 11. The arc of the forward upturned section 11 is optimized for hydrodynamics, reducing water resistance at the front during navigation and assisting in blocking water. A mounting bracket 12 is provided at the stern of the raft plate 1, with mounting holes on its surface to accommodate drive equipment for stable mounting and providing propulsion. Side panels 2 are hollow inflatable structures, symmetrically arranged on the left and right sides of raft deck 1. The lower end of side panels 2 is detachably connected to the left and right side edges of raft deck 1 via sealed quick-release connectors. The sealed quick-release connectors adopt an embedded sealing design, which not only ensures the waterproof performance of the connection parts, but also allows for quick disassembly and assembly by manual operation, facilitating transportation and storage. The front upright 3 is also a structure with an independent air chamber inside, which is laterally connected to the front end of the two side panels 2. The height of the front upright 3 is higher than that of the side panels 2, and the connection between the inner side of the front upright 3 and the two side panels 2 is connected to supporting ribs 31. The supporting ribs 31 are triangularly distributed to enhance the strength of the connection nodes, prevent deformation of the front upright 3 and side panels 2 during navigation or collision, and maintain the airtightness of the enclosed space between the two.

[0046] To achieve both dry storage and splash protection, a front-mounted sealed storage compartment 5 is formed by the front upturned section 11, the front upright plate 3, the two side plates 2, and the boat awning 4. The boat awning 4 is made of waterproof and wear-resistant fabric and is angled at the front of the hull. One end is fixed to the front edge of the front upturned section 11 using a high-frequency heat-sealing process, and the other end is connected to the top edge of the front upright plate 3 via a waterproof zipper 41. The waterproof zipper 41 is arranged horizontally along the top of the front upright plate 3 and can be manually pulled to open and close the storage compartment 5. When closed, it fits tightly against the boat awning 4 and the front upright plate 3, ensuring the interior of the storage compartment 5 remains dry. When open, it allows users to easily access dry food, electronic devices, fishing gear, and other items. The angled boat awning 4 and the front upturned section 11 form a continuous front water-blocking structure, directly intercepting splashing water during navigation. Combined with the front upright plate 3, which is higher than the side plates 2, it further blocks water from higher positions, preventing water from entering the hull or splashing onto the crew, thus maintaining a dry environment inside the hull.

[0047] Meanwhile, the design of the front-mounted sealed storage compartment 5 fully considers the center of gravity balance requirements. Its effective weight capacity is matched with the weight of the drive equipment mounted on the mounting bracket 12. By rationally planning the amount of items stored in the storage compartment 5, it ensures that the overall center of gravity of the boat falls within the stable area along the length of the raft plate 1. This fundamentally solves the problem of the center of gravity shifting backward in traditional catamarans due to the drive equipment being concentrated at the stern, reduces the swaying amplitude of the boat during navigation, and provides a stable platform for fishing operations.

[0048] To cope with temporary imbalances caused by factors such as wind and waves, personnel movement, and changes in the location of fish storage, two sets of parallel slide rails 51 are fixedly installed at the bottom of the front-mounted sealed storage compartment 5 along the length of the raft plate 1. The slide rails 51 are made of stainless steel and have been treated with anti-rust coating. A counterweight storage box 52 is slidably mounted on the slide rails 51. The counterweight storage box 52 has a sealed structure and can be used as a container for storing extra fishing gear. It can also achieve center of gravity compensation by adjusting its own weight and position. A drive motor 53 and a balance sensor 54 are fixedly installed on the inner side wall of the storage compartment 5. The output end of the drive motor 53 is connected to the counterweight storage box 52 through a gear and rack transmission assembly, which can drive the counterweight storage box 52 to move back and forth along the slide rail 51. The balance sensor 54 establishes a data communication connection with the drive motor 53 and has a preset hull balance reference threshold. When the balance sensor 54 detects that the hull tilt angle exceeds the reference threshold, it will immediately send a control signal to the drive motor 53. The drive motor 53 starts and drives the counterweight storage box 52 to move along the slide rail 51. By adjusting the front and rear position of the counterweight storage box 52, the center of gravity shift is compensated in real time, and the hull is quickly restored to a balanced state, ensuring the stability of navigation and fishing.

[0049] In terms of collision protection, collision rings are continuously installed along the circumference of the outer side of the hull. These rings are made of highly elastic and wear-resistant rubber and are fixed to the outer side of the hull with a high-strength adhesive. The collision rings continuously wrap around the front end face of the forward-curved part 11 of the raft deck 1 and the outer side walls of the two side plates 2, covering key areas where the hull is prone to collisions with reefs, docks, and other vessels during navigation, forming a full-circumferential collision barrier. The cross-section of the collision rings is semi-circular. This design ensures sufficient structural strength to buffer collision impacts and prevent damage to the main hull structure, while also optimizing the hydrodynamic performance of the outer side of the hull, reducing water resistance interference during navigation, and achieving a synergistic improvement in protective performance and navigation efficiency.

[0050] To precisely meet the needs of water fishing, the upper surface of the raft board 1 is specifically designed: four fishing rod bases 13 are symmetrically fixed along the width of the raft board 1. The fishing rod bases 13 are made of non-slip material and have a fixing slot on the top to accommodate fishing rods, allowing multiple fishing rods to be mounted at the same time, preventing the fishing rods from tipping over, sliding, or falling off due to the swaying of the boat during fishing; three sets of elastic ropes 14 are also fixed to the upper surface of the raft board 1. The two ends of the elastic ropes 14 are connected to the raft board 1 by metal buckles, and can use their elasticity to tie and fix fishing gear, catches, etc., to prevent them from slipping into the water when the boat sways; a measuring ruler 15 is also attached to the surface of the raft board 1. The measuring ruler 15 is made of water-resistant material and its scale lines are treated with a non-slip and scratch-resistant coating, which can resist friction, scratches and water erosion in daily use, maintain clear and readable scale lines, and allow users to directly measure the size of catches on the boat without having to carry additional special measuring tools.

[0051] In terms of comfort features inside the hull, two inflatable seats 7 can be detachably installed between the two side panels 2. The inflatable seats 7 are made of high-elasticity waterproof fabric and filled with high-resilience sponge. After inflation, they form an ergonomic support structure that can effectively distribute body pressure and reduce fatigue during long fishing sessions. Along the length of the raft board 1, the inflatable seats 7 are located behind the front-mounted sealed storage compartment 5. This position design does not take up storage space and allows users to have a good view, making it easy to observe the water conditions and control the fishing rod. In addition, anti-slip handles 8 are fixedly installed on the inner side of the front upright plate 3, the top of the two side plates 2, and the front end of the raft plate 1. The surface of the anti-slip handles 8 is textured and anti-slip, making it easy for users to grip when getting on and off the boat, and also providing a stable support point for users when the boat is rocking, reducing the risk of falling. The inner side of the front upright plate 3 is detachably installed with an elastic drawstring net bag 32 via Velcro. The elastic drawstring net bag 32 can store small items such as bait boxes and mobile phones, which are easy to access at any time. The detachable design makes it easy to clean and replace the net bag 32. Fishing brackets 21 are welded to the inner walls of the two side plates 2. The angle and height of the fishing brackets 21 can be adjusted by a knob. They can temporarily support spare fishing rods and adjust the rod position according to the fishing direction to adapt to the fishing habits of different waters.

[0052] To enhance navigation safety, the hull is equipped with a multi-dimensional safety protection system: an alarm with audible and visual alarm functions is fixedly installed on the outer wall of the forward upright plate 3, and the alarm housing is waterproof; at the same time, a pressure detector is installed in the air chamber of the raft plate 1, the air chambers of the two side plates 2, and the air chamber of the forward upright plate 3. The pressure detectors are connected to the alarm signal via wires, and each pressure detector has a preset pressure threshold; when the actual air pressure in any air chamber is lower than the preset threshold due to damage or other reasons, the corresponding pressure detector will immediately send a trigger signal to the alarm, and the alarm will then issue an audible and visual alarm signal to remind the user to check the air chamber status in time and take repair, air replenishment, and other measures to avoid the hull buoyancy and structural stability reduction due to insufficient air chamber pressure.

[0053] Regarding the optimization of the stern structure of raft plate 1, two detachable fin plates 16 are symmetrically installed on the lower surface of the stern of raft plate 1 along the width direction. The fin plates 16 are made of lightweight, high-strength plastic, and their extension direction is consistent with the length direction of raft plate 1. The fin plates 16 are detachably connected to the stern of raft plate 1 by bolts. Users can flexibly choose whether to install them according to the navigation water environment: when navigating in calm waters, removing the fin plates 16 can reduce water resistance and improve navigation efficiency; in waters with rapid currents or large waves, installing the fin plates 16 can guide the water flow, enhance the hull's directional stability, reduce side drift, reduce the directional deviation, and ensure that the hull sails stably in the preset direction.

[0054] This embodiment forms a complete and stable inflatable catamaran structure, which can effectively solve the problems of existing catamarans such as unbalanced center of gravity, water splashing, and lack of dry storage area. At the same time, it has excellent anti-collision performance, fishing adaptability and safety guarantee capabilities, and is suitable for medium and long-distance fishing, multi-water recreation and entertainment scenarios, providing users with an efficient, safe and comfortable water activity experience.

[0055] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An inflatable catamaran, characterized in that, It includes a raft board, side plates, and a front upright plate that form independent air chambers inside. The front side of the raft board is curved upward to form a front upturned part. The raft board is provided with a mounting bracket at the tail. The side plates are symmetrically arranged on the left and right sides of the raft board. The front upright plate connects the two side plates. The front upturned part, the front upright plate, and the two side plates are enclosed by a boat canopy to form a front-mounted sealed storage compartment. The boat canopy is inclined and connects the front end of the front upturned part and the top of the front upright plate to form a front water-blocking structure that prevents water from splashing. The effective weight W1 that the sealed storage compartment can bear and the weight W2 of the drive equipment mounted on the mounting bracket satisfy 0.8W2≤W1≤1.2W2, so that the overall center of gravity of the hull falls in the area of ​​1 / 3 to 2 / 3 of the length of the raft.

2. The inflatable catamaran according to claim 1, characterized in that, It also includes anti-collision rings that are continuously arranged along the circumference of the outer side of the hull. The anti-collision rings are made of highly elastic and wear-resistant rubber and continuously wrap around the front end face of the raft deck and the outer side walls of the two side plates. The cross-section of the anti-collision rings is semi-circular.

3. The inflatable catamaran according to claim 1, characterized in that, The height of the front upright plate is 1.2 to 1.8 times the height of the side plates; a supporting rib is provided between the inner side of the front upright plate and the two side plates.

4. An inflatable catamaran according to claim 1, characterized in that, The lower ends of both side plates are detachably connected to the left and right side edges of the raft plate via sealed quick-release connectors; A waterproof zipper is provided at the connection between the boat canopy and the front upright, and the waterproof zipper is used to control the opening and closing of the storage compartment.

5. An inflatable catamaran according to claim 1, characterized in that, The upper surface of the raft board is symmetrically provided with at least two fishing rod bases along the width direction, and the upper surface of the raft board is also provided with at least two sets of elastic ropes; the surface of the raft board is also attached with a measuring ruler, and the scale lines of the measuring ruler are treated with an anti-slip and scratch-resistant coating.

6. An inflatable catamaran according to claim 1, characterized in that, It also includes an inflatable seat, which is detachably installed between the two side panels and located at the rear of the storage compartment along the length of the raft.

7. An inflatable catamaran according to claim 1, characterized in that, The front upright plate is equipped with an alarm with sound and light alarm function, and at least one air pressure detector is installed in the air chamber of the raft plate, the air chambers of the two side plates and the air chamber of the front upright plate. Each of the air pressure detectors is connected to the alarm, and each air pressure detector has a preset air pressure threshold. When the actual air pressure in any air chamber is lower than the air pressure threshold, the air pressure detector triggers the alarm to emit an audible and visual alarm signal.

8. An inflatable catamaran according to claim 1, characterized in that, At least one set of slide rails is fixedly provided at the bottom of the storage compartment along the length of the raft deck. A counterweight storage box is slidably mounted on the slide rails. A drive motor and a balance sensor for detecting the tilt angle of the hull are also fixedly installed inside the storage compartment. The drive motor is connected to the counterweight storage box via a transmission assembly, and is used to drive the counterweight storage box to move back and forth along the slide rail. The drive motor establishes a data communication connection with the balance sensor, and the balance sensor is preset with a hull balance reference threshold. When the balance sensor detects that the hull tilt angle exceeds the reference threshold, the drive motor drives the counterweight storage box to move along the slide rail, and the center of gravity shift is compensated in real time by adjusting the front and rear position of the counterweight storage box.

9. An inflatable catamaran according to claim 1, characterized in that, The lower surface of the tail section of the raft is symmetrically provided with at least two detachable fins along the width direction, and the extension direction of the fins is consistent with the length direction of the raft.

10. An inflatable catamaran according to claim 1, characterized in that, The inner side of the front upright plate, the top of the two side plates, and the front end of the raft plate are all provided with anti-slip handles. An elastic, tapered net bag can be detachably installed on the inner side of the front upright plate. Fishing brackets are provided on the inner side walls of the two side plates for temporarily supporting spare fishing rods or to meet the rod-mounting needs of different fishing positions.

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