Inflatable torrent kayak with narrow hull and U-shaped cross section

Abstract

The utility model discloses an inflatable torrent kayak with a narrow hull and a U-shaped cross section, which belongs to the field of portable backpack boats and comprises an inflatable tubular body, the tubular body is provided with a bow, a middle section and a stern, and the bow, the middle section and the stern are sequentially connected; the middle section comprises a bottom plate and two side pipes, and the two side pipes are symmetrically arranged on the two sides of the bottom plate; a central seat area is formed between the bottom plate and the two side pipes; the side pipe is composed of at least two side wall branch pipe parts; for a single side pipe, the side wall branch pipe parts are sequentially connected into a whole in the vertical direction. The section, perpendicular to the central axial direction of the side pipe, of the side pipe is in an oval shape or an oval-like shape, and the height of the side pipe is larger than the width of the side pipe. The ship side wall and the bottom plate are combined, and the section of the middle section in the vertical direction is similar to a U shape. According to the kayak with a novel structure, the agility and secondary stability of the torrent kayak can be effectively improved, and Eski rolling can be completed with high reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of portable backpack boat, concretely to an inflatable whitewater kayak with narrow hull and U-shaped cross section. BACKGROUND

[0002] Compared with other boats, the backpack boat (packraft) has the advantages of portability, easy storage, stability and easy to learn, and is more and more popular. The backpack boat originated in the United States, and the domestic backpack boat market started after the epidemic. The backpack boat is not only a sport, but also a unique way of travel that is attracting a large number of outdoor enthusiasts to become believers of this sport lifestyle. Paddling during the day and camping on the shore at night, this unique lifestyle has become a way of life for some backpackers.

[0003] The calm water in the park is called still water, and the water with strong current in the countryside is called white water. The existing backpack boat has strong stability and is easy to operate, which is friendly to beginners and suitable for sailing in still water. However, in white water, the strong current may cause the backpack boat to overturn. In the rapids, if the paddler and the boat are separated, it may cause short-term drowning. The mature application of Eskimo roll skill greatly ensures the safety of paddlers in the rapids, and it is a skill that high-level paddlers must master. Therefore, when the backpack boat user has certain backpack boat experience, masters the safety knowledge, and has the ability to judge the water situation, he can start to try to paddle the backpack boat in the white water and advance to a more experienced backpack boat player.

[0004] If the user of the backpack boat can complete the Eskimo roll with high reliability, the safety of the user will be greatly improved. Therefore, the present application provides an inflatable whitewater kayak with narrow hull and U-shaped cross section. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide an inflatable whitewater kayak with narrow hull and U-shaped cross section, which can overcome the problem that the user is difficult to complete the Eskimo roll with high reliability due to the limitation of the structure of the existing backpack boat, and improve the safety of the user in white water.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] The inflatable whitewater kayak with narrow hull and U-shaped cross section comprises a tubular body that can be inflated and deflated, the tubular body has a bow, a middle section and a stern, and the bow, the middle section and the stern are connected in sequence.

[0008] The middle section comprises a bottom plate and side pipes, the side pipes are two and symmetrically arranged on both sides of the bottom plate; the bottom plate and the two side pipes form a central seat area;

[0009] The side pipe is composed of at least two side wall pipe parts; in terms of a single side pipe, the side wall pipe parts are sequentially connected in the vertical direction to form an integral whole; the side pipe is oval or oval-like in the cross section perpendicular to the central axis of the side pipe; the height of the side pipe is greater than the width of the side pipe;

[0010] The side pipe is combined with the bottom plate, and the profile of the middle section in the vertical direction is U-like;

[0011] The bottom plate is made of flexible material;

[0012] It also comprises a footrest that can be filled and drained with water, and the footrest is arranged in the bow.

[0013] The side pipe is oval in the cross section perpendicular to the central axis of the side pipe.

[0014] The cross section of the side wall pipe part is circular, oval or oval-like.

[0015] The existing cylindrical side pipe is changed to an oval or oval-like side pipe.

[0016] The side pipe is shaped into an oval or oval-like shape by arranging a stay inside the side pipe.

[0017] The side pipe comprises a first pipe outer wall and a first pipe stay, the first pipe stay is at least one, the first pipe stay is arranged inside the first pipe outer wall, and the first pipe stay and the inner side of the first pipe outer wall and the inner side of the first pipe outer wall between adjacent two first pipe stays form a side wall pipe part.

[0018] Or the side pipe is composed of at least two independent side wall pipe parts; adjacent two side wall pipe parts are sequentially connected in the vertical direction to form an integral whole by means of adhesive or sewing.

[0019] The first pipe stay is 1-9.

[0020] The side pipe is composed of 2-10 side wall pipe parts sequentially connected in the vertical direction to form an integral whole.

[0021] The width of the central seat area is slightly greater than the body width of the user.

[0022] It also comprises an inflatable bottom support plate, and the inflatable bottom support plate is arranged on the bottom plate.

[0023] The inflatable bottom support plate is arranged at the normal water position of the bottom.

[0024] Solutions can be added to the footrests to adjust the weight of the footrests.

[0025] The transition section is further included, and the bow and the middle section and the middle section and the stern are connected by the transition section respectively.

[0026] The end of the transition section connected with the middle section is oval or oval-like, and the end of the transition section connected with the bow or the stern is round.

[0027] The end of the transition section connected with the middle section is oval or oval-like, and the end of the transition section connected with the bow is round between the bow and the middle section.

[0028] Or the end of the transition section connected with the middle section is oval or oval-like, and the end of the transition section connected with the stern is round between the stern and the middle section.

[0029] When the inflatable whitewater kayak with a narrow hull and a U-shaped cross section is inflated and in a natural and static state, the bow is relatively raised relative to the bottom plate in the direction from the middle section to the bow.

[0030] When the inflatable whitewater kayak with a narrow hull and a U-shaped cross section is inflated and in a natural and static state, the stern is relatively raised relative to the bottom plate in the direction from the middle section to the stern.

[0031] The horizontal plane where the end of the bow away from the middle section is located is above the horizontal plane where the end of the bow close to the middle section is located.

[0032] The horizontal plane where the end of the stern away from the middle section is located is above the horizontal plane where the end of the stern close to the middle section is located.

[0033] The inflatable whitewater kayak with a narrow hull and a U-shaped cross section is used in still water or whitewater.

[0034] The inflatable whitewater kayak with a narrow hull and a U-shaped cross section of the present application is a novel inflatable whitewater kayak, which can effectively improve the agility performance and secondary stability of the whitewater kayak, and can reliably complete the Eskimo roll. BRIEF DESCRIPTION OF DRAWINGS

[0035] The present specification will be further illustrated in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, the same numbers represent the same structures, wherein:

[0036] Figure 1 It is a top view of the inflatable whitewater kayak with a narrow hull and a U-shaped cross section in Example 1.

[0037] Figure 2A schematic diagram of the principle of partial development of the inflatable whitewater kayak with a narrow hull and a U-shaped cross section according to the example 1.

[0038] Figure 3 A schematic diagram of the structure after removing the first pipe outer wall. Figure 2

[0039] Figure 4 A two-dimensional line drawing of the inflatable whitewater kayak with a narrow hull and a U-shaped cross section according to the example 1. Figure 3

[0040] Figure 5 A schematic diagram of the vertical section of the middle section of the inflatable whitewater kayak with a narrow hull and a U-shaped cross section according to the example 1.

[0041] Figure 6 A schematic diagram of the contact of the existing backpack boat when encountering waves.

[0042] Figure 7 A schematic diagram of the structure of the existing backpack boat after overturning.

[0043] Figure 8 A schematic diagram of the contact of the inflatable whitewater kayak with a narrow hull and a U-shaped cross section according to the example 1 when encountering waves.

[0044] Markings in the figure: 1, bow, 2, middle section, 3, stern, 4, first pipe outer wall, 5, first pipe stay, 6, transition section, 7, wave, 8, existing backpack boat, 9, inflatable whitewater kayak according to the example 1. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some examples or embodiments of the present application, and for those skilled in the art, the present application can also be applied to other similar scenarios without creative labor on the basis of these drawings. Unless it is obvious from the language environment or otherwise stated, the same reference numerals in the figures represent the same structure or operation.

[0046] It should be understood that the "system", "device", "unit" and / or "module" used herein is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0047] ​​As shown in the present application and claims, unless otherwise clearly indicated by context, "a," "an," and "the" can refer to both the singular and plural form, by virtue of their usage in this application. Generally, the terms "comprise(s)," "include(s)," "has(s)," and "has got" should be construed to mean that "without excluding what is not listed."

[0048] In the description of the present specification, it should be understood that the terms "first", "second", "third", "fourth" and the like are used only to describe purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second", "third", "fourth" can explicitly or implicitly include at least one of the features. In the description of the present specification, the meaning of "a plurality of" is at least two, such as two, three, and the like, unless otherwise specifically limited.

[0049] In the present specification, unless otherwise clearly specified and limited, the terms "connection", "fixing" and the like should be understood in a broad sense. For example, the term "connection" can refer to fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in the present specification can be understood according to the specific circumstances.

[0050] Embodiment 1

[0051] The embodiment provides an inflatable whitewater kayak with a narrow hull and a U-shaped cross section, which comprises a tubular body that can be inflated and deflated, and a footrest that can be filled with water. The tubular body has a bow, a middle section and a stern, which are connected in sequence. The middle section includes a bottom plate and two side pipes, which are symmetrically arranged on both sides of the bottom plate. The central seat area is formed between the bottom plate and the two side pipes, and the width of the central seat area is slightly larger than the body width of the user. The footrest is arranged in the bow, and the water in the footrest can be increased or decreased to adjust the weight of the footrest.

[0052] The side tube is composed of at least two side wall sub-tubes. In the embodiment, the side tube comprises a first sub-tube outer wall and a first sub-tube brace arranged in the first sub-tube outer wall. In one specific example, there are two first sub-tube braces. In this structure, the three side wall sub-tubes are formed between the first sub-tube braces and the inner side of the first sub-tube outer wall. The cross section of the side wall sub-tube can be circular, elliptical, or oval. In terms of a single side tube, the side wall sub-tubes are connected in sequence along the vertical direction, the side tube has an oval cross section perpendicular to the central axis, and the height of the side tube is greater than the width of the side tube. The bottom plate is made of flexible material. The middle section formed by the combination of the bottom plate and the side tubes on both sides has a U-shaped cross section along the vertical direction. Further, the inflatable boat also comprises an inflatable bottom support plate arranged at the normal waterline position of the boat bottom.

[0053] Further, the inflatable boat also comprises a transition section connecting the bow and the middle section and the middle section and the stern. Specifically, in the connection between the bow and the middle section, the end connected to the middle section of the transition section is oval or oval-shaped, and the end connected to the bow of the transition section is circular. In the connection between the stern and the middle section, the end connected to the middle section of the transition section is oval or oval-shaped, and the end connected to the stern of the transition section is circular.

[0054] At the same time, when the inflatable kayak with a narrow hull and a U-shaped cross section is inflated and in a natural and static state, the bow is relatively raised relative to the bottom plate in the direction from the middle section to the bow. When the inflatable kayak with a narrow hull and a U-shaped cross section is inflated and in a natural and static state, the stern is relatively raised relative to the bottom plate in the direction from the middle section to the stern. In this structure, the horizontal plane where the end of the bow away from the middle section is located is above the horizontal plane where the end of the bow close to the middle section is located. The horizontal plane where the end of the stern away from the middle section is located is above the horizontal plane where the end of the stern close to the middle section is located.

[0055] It should be noted that after the inflatable kayak with a narrow hull and a U-shaped cross section is inflated, the bow and the stern will be raised upward compared to the middle section of the inflatable kayak with a narrow hull and a U-shaped cross section, which is independent of whether the inflatable kayak with a narrow hull and a U-shaped cross section is in a static state or in a whitewater state. The aforementioned assumption that it is in a natural and static state is only for ease of description and is not limiting. It should be noted that after the inflatable kayak with a narrow hull and a U-shaped cross section is inflated, even if it is subjected to external forces, the inflatable kayak with a narrow hull and a U-shaped cross section will maintain a relatively fixed shape. The use of this structure helps to reduce the bow and is helpful for crossing waves, and is conducive to meeting the needs of whitewater use and improving the stability of the heading.

[0056] Compared with the existing back-pack ship, the existing cylindrical side pipe is replaced by an oval or oval-shaped side pipe. Specifically, by arranging a first sub-pipe pull strip inside the side pipe, the side pipe is shaped into an oval shape, and the bow and stern are raised upward relative to the bottom plate.

[0057] Figure 6 、 Figure 7 The contact diagram of the existing back-pack ship when encountering waves is given, and the diagram after the ship overturns is given. Figure 6 The contact diagram of the existing back-pack ship when encountering waves is given, Figure 7 The structure diagram of the existing back-pack ship after overturning is given. Figure 8 The contact diagram of the existing back-pack ship when encountering waves is given,

[0058] As Figure 6 shown, the existing back-pack ship usually adopts a flat bottom design, and the middle section of both ends adopts a cylindrical design. With this structure, the static stability of the ship is improved. Based on the structural advantages of the existing back-pack ship, it has strong stability in static water area, can effectively maintain its balance, and prevent overturning.

[0059] The existing back-pack ship has good primary stability, and is suitable for low-speed static rivers and / or lakes, but is difficult to apply to rapids. In rapids, once the existing back-pack ship overturns, the paddler will be in the water. As Figure 7 shown, after the existing back-pack ship overturns, based on its good primary stability, it is difficult for the user to reliably achieve Eskimo roll.

[0060] In this application, the structure and line of the inflatable whitewater kayak are adjusted, and the performance of the hard whitewater kayak is achieved in a similar way. Based on the improvement of the foregoing structure, the width of the ship body can be reduced. In this application, a pull strip (i.e. a first sub-pipe pull strip is arranged inside the outer wall of the first sub-pipe) is added inside the inflatable gunwale on both sides of the ship, and the circular cross section of the inflatable gunwale is shaped into an oval or oval shape (the major axis of the oval or oval shape is arranged in the vertical direction), so as to reduce the width of the ship body, which is beneficial to the efficiency of the paddle and the control of the ship body.

[0061] Based on the improved structure, the roll resistance of the ship body of the application when Eskimo roll overturns is small. The cylindrical body on both sides of the gunwale of the application is changed to an oval-shaped gunwale, and under the premise of constant height, the ship body becomes narrower, so that the roll resistance when Eskimo roll overturns is small. As Figure 8As shown, the improved cross section of the middle section of the hull is similar to a U shape; when encountering waves, the contact area of the present application with the waves is smaller, which effectively improves the secondary stability of the kayak after it overturns, and can complete the Eskimo roll with high reliability.

[0062] As previously described, the existing backpack boat is very stable in flat water and waves, that is, the primary stability is good, but in violent rapids, the righting moment suddenly decreases when the hull reaches a certain inclination, which is unexpected and easy to overturn, and it is more difficult to perform an Eskimo roll for self-rescue. The bottom of the present application is slightly curved, combined with the side tubes on both sides, and the overall shape is a U shape. In the present application, the secondary stability of the hull is very good, which gives the paddler more freedom of control. Although the stability of the hull mainly depends on the user's own balance, it will further develop the control level of the paddler, which cannot be achieved by the existing backpack boat.

[0063] Further, the present application can improve the overall shape of the hull and ensure its rigidity. Under normal circumstances, narrowing the ship's side will affect the rigidity of the hull, and the present application uses internal braces to adjust the shape between the narrow ship's side and the bow and between the narrow ship's side and the stern (i.e., the first sub-pipe brace is arranged in the first sub-pipe outer wall), the shape achieves a smooth transition, and meets the needs of the hull's streamline and rigidity at the same time.

[0064] The bottom plate is made of flexible material, and the internal width of the central seat area of the hull is slightly larger than the body width of the user, ensuring sufficient comfort; at the same time, the cross section of the bottom plate of the middle section and the side tubes on both sides along the vertical direction is similar to a U shape. In a specific example, the external width of the central seat area of the hull is about 65cm-75cm, preferably 65cm-70cm. Further, it also includes an inflatable bottom support plate arranged on the bottom (flexible material). By using this structure, the cross section of the bottom is shaped into a smooth transition U shape, improving the secondary stability, which is beneficial to the ability of the paddler to control the kayak's roll angle.

[0065] In the present embodiment, the inflatable bottom support plate is only arranged at the normal water position of the bottom. At the same time, the inflatable bottom support plate is not arranged at the raised position of the bow and stern, only the bottom skin is arranged, in order to reduce the weight and the difficulty of maintenance, and increase the space inside the boat.

[0066] In the present application, the design of the raised bow and stern, combined with the structural improvement of the middle section, is beneficial to the adjustment of the center of gravity and the completion of the Eskimo roll; at the same time, this structure helps to lift the bow when rushing through waves; further, the overall structural design, the bow and stern are relatively raised, which can also make the middle section deeper, which is beneficial to improve the secondary stability.

[0067] Further, the footrests are arranged in the bow. Water is easily obtained and can be added to the footrests to adjust the weight of the footrests. The inflatable whitewater kayak of the present application is very light, and the overall center of gravity of the boat and the paddler is concentrated in the middle section, and the bow and stern are relatively light, and the bow has small inert potential energy; when the bow collides with the rapids, the bow is easily skewed and difficult to control. If you want to increase the stability of the bow, the most ideal way is to add weight to the low bow. Since water is easily obtained, the footrests are arranged in the bow, and the footrests can be filled with water and the capacity can be adjusted. With this structure, the function of the footrests is met, and the weight of the bow is increased, the inert potential energy of the bow is increased, and the stability of the bow is improved, which is beneficial to control. The appropriate weight of the water can be filled through experiments to adjust the heading stability of the boat to an easy-to-control interval.

[0068] The actual test results show that: the inflatable whitewater kayak with a narrow hull and a U-shaped cross section of the present application can easily use Eskimo roll in the rapids, achieve the purpose of self-rescue, and the technical essentials and success rate are close to that of the hard whitewater kayak, which is not achieved by the existing backpack boat.

[0069] In summary, based on the improved structure, the inflatable whitewater kayak with a narrow hull and a U-shaped cross section of the present application can be used in still water or rapids, and is especially suitable for use in rapids. The present application can make it easier for users to achieve Eskimo roll, thereby effectively expanding its application range.

[0070] Unless the claim recitations clearly dictate otherwise, the sequence of processing elements and sequence of number and letter designations recited in this description are not intended as a limitation on the order of such processing elements or sequences. Although the above disclosure discusses some presently preferred embodiments of the application, it should be apparent that the teaching herein can be varied in a multitude of ways. Such variations are not to be regarded as a departure from the spirit and scope of the application, and the intent is to be limited only as indicated by the appended claims.

[0071] Similarly, it is to be noticed that the term "comprising", used in the description, is not intended to exclude other elements or steps. It is to be understood that the elements or steps recited can also be combined in a plurality of ways with the other elements or steps mentioned. It is especially noted that the order of the steps presented in the description is not meant to be limiting. It is therefore contemplated to be within the scope of the application that the steps can be performed in other sequences that are not presented if such sequences do not depart from the spirit and scope of the application.

[0072] Having described the basic concepts, it is obvious that the above detailed disclosure is intended to be illustrative only and not restrictive of the application. Although not explicitly described, modifications, improvements, and changes to the embodiments described herein are possible by those skilled in the art. Such modifications, improvements, and changes are intended to be within the spirit and scope of the application.

Claims

1. An inflatable whitewater kayak with a narrow hull and a U-shaped cross section, comprising an inflatable tubular body, the tubular body having a bow, a middle section and a stern, the bow, the middle section and the stern being connected in sequence; the middle section comprising a bottom plate, side tubes, the side tubes being two and symmetrically arranged on both sides of the bottom plate, a central seat area being formed between the bottom plate and the two side tubes; the side tube being composed of at least two side wall tube parts, for a single side tube, the side wall tube parts being connected in sequence and integrated in the vertical direction, the side tube being elliptical or oval in cross section perpendicular to the central axis, the height of the side tube being greater than the width of the side tube; the side tube being combined with the bottom plate, the middle section being U-shaped in vertical cross section; the bottom plate being made of flexible material; further comprising an inflatable footrest, the footrest being arranged in the bow; the cross section of the side wall tube part being circular, elliptical or oval; the side tube comprising a first tube outer wall and a first tube stay, the first tube stay being at least one, the first tube stay being arranged in the first tube outer wall, the first tube stay and the inner side of the first tube outer wall, or the first tube stay and the inner side of the first tube outer wall between adjacent first tube stays, forming a side wall tube part; or the side tube being composed of at least two independent side wall tube parts, adjacent side wall tube parts being connected in sequence and integrated in the vertical direction by means of adhesive or sewing; further comprising an inflatable bottom support plate, the inflatable bottom support plate being arranged on the bottom plate; the inflatable bottom support plate being arranged at the normal water position of the bottom; further comprising a transition section, the bow and the middle section being connected by a transition section, and the middle section and the stern being connected by a transition section; the end of the transition section connected to the middle section being elliptical or oval, and the end of the transition section connected to the bow or the stern being circular; the end of the transition section connected to the middle section being elliptical or oval, and the end of the transition section connected to the bow being circular between the bow and the middle section; or the end of the transition section connected to the middle section being elliptical or oval, and the end of the transition section connected to the stern being circular between the stern and the middle section; when the inflatable whitewater kayak with a narrow hull and a U-shaped cross section is inflated and naturally static, the bow is relatively raised relative to the bottom plate in the direction from the middle section to the bow; when the inflatable whitewater kayak with a narrow hull and a U-shaped cross section is inflated and naturally static, the stern is relatively raised relative to the bottom plate in the direction from the middle section to the stern; the horizontal plane where the end of the bow away from the middle section is located is above the horizontal plane where the end of the bow close to the middle section is located; the horizontal plane where the end of the stern away from the middle section is located is above the horizontal plane where the end of the stern close to the middle section is located. ​ characterized in that ​ ​ ​ ​ 2. An inflatable kayak according to claim 1, wherein, ​ 3. An inflatable kayak according to claim 2, wherein, ​ ​ 4. An inflatable kayak according to claim 2, wherein, ​ 5. An inflatable kayak according to claim 4, wherein, ​ 6. An inflatable kayak according to claim 2 or 3, wherein, ​ 7. An inflatable kayak according to claim 6, wherein, ​ 8. An inflatable kayak according to claim 7, wherein, ​ ​ 9. The inflatable kayak of claim 6, wherein, ​ ​ 10. An inflatable kayak according to claim 9, wherein, ​ ​

Images