Novel dragon boat radius

Abstract

The utility model discloses a novel dragon boat radial device which comprises a radial handle, a radial surface, a handle tip torsion control grip and a handle root grip. The upper end of the radial handle is vertically and fixedly connected with the middle part of the handle tip torque control grip, the lower end of the handle root grip is obliquely connected with the radial surface, the whole radial surface is in a big-end-up plate shovel shape, and the upstream side of the section of the radial surface is of a slightly concave arc-shaped structure. Due to the forwards-warped radial face, the gradient counter-acting force direction integral median of water is kept right ahead, the right-ahead component force is increased, and the downward component force is reduced; and meanwhile, the radial surface is widened and shortened, so that the center of the counter-acting force of water is closer to the handle root grip, more labor is saved during paddling, and the counter-acting force of water can be increased through the slightly-concave radial surface of the upstream face.

Description

Technical Field

[0001] The utility model relates to the technical field of dragon boats, in particular to a new type of dragon boat oar. Background Art

[0002] Dragon boat racing is one of the customs during the Dragon Boat Festival in China. It is widespread in southern regions and also exists in cities near rivers and lakes in the north. At the same time, as a water sport, it has become popular internationally. Dragon boat races must use oars. As shown in Figure 1-2 the commonly used standard dragon boat oar at present, which consists of an oar blade and an oar handle. The materials are mostly made of solid wood, carbon fiber, etc. The oar blade is flat, narrow and long, and the oar handle is connected within its plane.

[0003] Analyzing this traditional structure and ergonomics from the technical level of dragon boat rowers, there are obviously two prominent disadvantages, which limit the exertion of rowers' strength and skills and affect the results of dragon boat races.

[0004] Disadvantage 1: For a straight oar, taking the integral from the oar blade entering the water to leaving the water and taking the median value of the integral, when the angle between the oar blade and the water surface is 70°, the direction of the reaction force of the water on the oar blade is 20° forward and downward. The forward component of the force exerted by the rowers loses 1 - cos20° ≈ 0.06, that is, 6% of the forward component of the force, but increases the sin20° ≈ 0.34 of the rowing force, that is, 34% or one-third, causing the hull to sink and increasing the running resistance.

[0005] Disadvantage 2: The oar blade is narrow and long, and the lever arm of the reaction force center of the water on the grip at the root of the handle is too long, making rowing more strenuous.

[0006] Therefore, a new type of dragon boat oar is proposed, which can be called a warped oar or a curved oar. The oar blade warps forward on the basis of the extension line of the oar handle. At the same time, on the premise that the area of the oar blade remains unchanged, the length is shortened and the width is increased to solve the obvious deficiencies existing at present. Content of the Utility Model

[0007] The technical problem to be solved by the utility model is to overcome the above-mentioned technical defects and provide a new type of dragon boat oar.

[0008] To solve the above technical problem, the technical solution provided by the utility model is a new type of dragon boat oar: including an oar handle, an oar blade, a grip control twist at the tip of the handle and a grip at the root of the handle;

[0009] The upper end of the oar handle is vertically and fixedly connected to the middle of the grip control twist at the tip of the handle. The lower end of the grip at the root of the handle is obliquely connected to the oar blade. The oar blade is in the shape of a spade with a larger upper part and a smaller lower part as a whole. The cross-section of the oar blade on the water-facing side is in a slightly concave arc structure.

[0010] As an improvement, the side of the oar blade with the slightly concave arc structure is the side of the oar blade away from the oar handle.

[0011] As an improvement, the angle between the extension line of the oar handle and the oar surface is 15 to 30°.

[0012] The advantages of the present utility model compared with the prior art are as follows:

[0013] 1. By the inclined setting between the oar handle and the oar surface, it can ensure that when using the oar to row the water, the integral median value of the direction of the water reaction force is directly in front or directly above the front, significantly increasing the forward component force and at the same time greatly reducing the downward component force;

[0014] 2. Without causing rubbing against the boat string when the oar surface is widened, shorten the widening, making the center of the water reaction force closer to the handle root grip, significantly reducing the effort of rowing and having a significant advantage in racing endurance. Description of the Drawings

[0015] Figure 1 is the front view of the existing dragon boat oar.

[0016] Figure 2 is the side view of the existing dragon boat oar.

[0017] Figure 3 is the front view of a new type of dragon boat oar of the present utility model.

[0018] Figure 4 is the side view of a new type of dragon boat oar of the present utility model.

[0019] As shown in the figure: 1. Oar handle, 2. Oar surface, 3. Handle tip control grip, 4. Handle root grip. Specific Embodiments

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the utility model. Generally, the components of the embodiments of the utility model described and illustrated herein can be arranged and designed in various different configurations.

[0021] In the description of the embodiments of the utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. This is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the utility model. In addition, terms such as "first", "second", "third", etc. are only used for differential description and cannot be understood as indicating or implying relative importance.

[0022] In addition, if terms such as "horizontal", "vertical", "hanging" are used, it does not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of the embodiments of the utility model, "a plurality of" means at least two.

[0024] In the description of the embodiments of the utility model, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to specific situations.

[0025] Combined with the attached Figure 3-4 As described, a new type of dragon boat oar includes an oar handle 1, an oar face 2, a handle tip control grip 3 and a handle root grip 4. In this embodiment, the oar handle 1 is a columnar structure, and the length of the oar handle 1 is set according to the actual situation.

[0026] The upper end of the oar handle 1 is vertically and fixedly connected to the middle of the handle tip control grip 3. Similarly, the handle tip control grip 3 is a columnar structure, and its length is set to meet the gripping needs of the hand during use.

[0027] The lower end of the handle root grip 4 is inclinedly connected to the oar face 2. During implementation, the included angle between the extension line of the oar handle 1 and the oar face 2 can be set according to the actual situation. Specifically, the included angle between the extension line of the oar handle 1 and the oar face 2 is 15 - 30°.

[0028] In actual use, due to the inclined setting between the oar handle 1 and the oar surface 2, the integral median value of the gradual change process of the oar surface 2 from entering the water to leaving the water can be kept in a vertical state, and the direction of the water reaction force remains directly forward or directly above the front.

[0029] The overall shape of the oar surface 2 is like a spade with a larger upper part and a smaller lower part. Compared with the traditional oar surface, while ensuring that its overall area remains unchanged and it is not easy to scrape the gunwale of the boat, the length of the oar surface 2 is shortened to 4 / 5 of the length of the traditional oar surface, and its width is increased by 1 / 5. When rowing, the center of the water reaction force is closer to the handle grip at the root of the oar, and the effort of rowing is significantly reduced, and the racing endurance is significantly superior.

[0030] The cross-section of the oar surface 2 on the water-facing side is in a slightly concave arc structure, which can enhance the water capture volume at one time and increase the water reaction force.

[0031] The above describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative work without departing from the creative purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A new type of dragon boat oar, characterized in that: It includes a radial handle (1), a radial surface (2), a tip control twist grip (3) and a root grip (4); The upper end of the radial handle (1) is vertically and fixedly connected to the middle of the tip control twist grip (3). The lower end of the root grip (4) is inclinedly connected to the radial surface (2). The radial surface (2) is overall in the shape of a spade with a larger upper part and a smaller lower part. The water-facing side of the cross-section of the radial surface (2) is in a slightly concave arc structure.

2. A novel dragon boat oar according to claim 1, characterized in that: The side of the radial surface (2) with the slightly concave arc structure is the side of the radial surface (2) away from the radial handle (1).

3. A novel dragon boat oar according to claim 1, characterized in that: The included angle between the extension line of the radial handle (1) and the radial surface (2) is 15 to 30°.

Images