JP3237281U - Swimming board for use on and underwater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the vertical movement of the upper body when performing a dolphin kick by wearing a foot fin, at the same time to facilitate control of waving, and to change the behavior generated by the vertical movement of a board into propulsive force by lift, underwater. We provide a swimming board that has neutral buoyancy so that it can be used in the water and reduces the resistance of water flow from the front. SOLUTION: The shape of a swimming board is a horizontally long hollow blade having a streamlined cross section like a pectoral fin of a dolphin or an orca. For neutral buoyancy that can be used in water, a hole 5 is made in the main body so that external water can be taken in, and by setting a buoyancy body 7 of the required volume inside, the entire swimming board is medium. It is possible to set the buoyancy close to the sexual buoyancy. The swimming board has a grip 3 that is easy to grasp by hand, and is designed so that it can be held at different angles. [Selection diagram] Fig. 1

Description

The present invention relates to a swimming board having a streamlined cross section on the surface of the water or underwater.

Conventional swimming boards are known to be made of foamable resin.
Swimmers can learn various kicks including crawl while breathing by gaining buoyancy of the upper body by grasping this board as a buoyancy body.
Buoyancy is a fundamental factor in these swimming boards.

On the other hand, the dolphin kick, which is a swimming method in which the legs are aligned, and the Basara kick, which is indispensable in swimming competitions, are swimming methods that are performed not on the surface of the water but in the water.
Therefore, in order to learn such a swimming method, it is possible to practice more effectively by having an auxiliary tool that stabilizes the upper body in the water, but the conventional swimming board has buoyancy, so it is only on the surface of the water. It cannot be used.

In addition, in order to move in water, a smooth streamlined shape is required to reduce resistance, but there was no board with a streamlined cross section with low resistance.

It is known that marine mammals such as orca and dolphins use pectoral fins to control waving and enable efficient movement, but there was no tool to apply this to humans.

JP 2016-503325

In order to master the swimming method such as dolphin kick and basara kick, which kicks with the legs aligned in water, it is important to learn the stability of the upper body in water and the swell below the chest. It is necessary to provide a swimming board that can be used underwater optimally for this.

In dolphin kicks and swimming Basara kicks, people raise their hands to resist vertical movements, but when dolphin kicks are performed with foot fins on, the area of the foot fins increases, causing a reaction during kicking, which causes a reaction. The upper body is easy to tilt and easy to tilt. This limits the use of the trunk muscles and thigh muscles, and there is a problem that sufficient muscle strength cannot be used.

The energy of the behavior generated by vertical movement can be converted into propulsive force by utilizing the generation of lift originally due to the streamlined shape, and it is a problem to make the board into such a streamlined shape with less water resistance. ..

In order to use the swimming board in the water, it is necessary to have neutral buoyancy, and in order to solve this, it is necessary to adjust the specific gravity of the board.

The present invention makes it possible to reduce the resistance of water from the front, which is a problem, by making the shape of the swimming board a horizontally long hollow blade with a streamlined cross section like the pectoral fin of a dolphin or orca. do.

Regarding the neutral buoyancy for use in water, the structure is such that it is possible to take in external water by making a hole in the main body, and by setting a buoyancy body of the required volume inside, the neutral buoyancy of the entire swimming board It is possible to set the buoyancy close to. However, the buoyancy structure should be such that it floats even in fresh water so that it will not sink when you release your hand in water.

The swimming board has a grip that is easy to grasp by hand, and is designed so that it can be held at different angles. This allows the swimmer to move the swimming board up and down with an angle of attack, and the lift generated by the streamlined board can provide propulsion.
In addition, the resistance to vertical movement by the surface of the swimming board creates the effect of stabilizing the upper body, and at the same time, it is possible to improve the controllability of waving, and the shape is such that efficient underwater movement can be realized.

By holding the swimming board with the streamlined blade as described above and fin-kicking it, the recoil caused by the fin-kick can be canceled and the stability of the upper body is improved.
In addition, it was confirmed that the waving control of the whole body became easy and it was effective for the training of the swimming method accompanied by these waving.

By holding the swimming board in hand and moving the arm up and down with an angle of attack according to the force of the fin kick, lift was generated on the blade, and the propulsive force from the swimming board was obtained, and the effect of proceeding easily was confirmed.
It was confirmed that fatigue of the leg muscles is reduced by actively using the trunk muscles instead of relying only on the thigh muscles for long-distance underwater movement.

It is a top view of the swimming board of this invention. It is sectional drawing of the swimming board of this invention. It is a figure which showed the movement when moving in water using this invention. Image of holding a swimming board in your hand.

The swimming board is horizontally long and the material is made of resin or wood. There are handle parts on the left and right sides of the shoulder width, and the cross section is streamlined like the cross section of a fish, minimizing resistance to water flow from the direction of travel, and in vertical movement, propulsive force equivalent to the lift of the wing is generated. Make the shape easy to use.
A hole should be made in the board at a position where it does not resist water so that water can be easily taken in and out.

The swimming board of the embodiment was made of FRP resin material, and the shape was horizontally long and the cross section was streamlined.
The shape of the front left and right of the board is a curved line with a large radius so as not to get injured when contacting other swimmers in a pool or the like.
The handle part is shaped so that it is easy to grip, and the thumb is passed underneath so that it can be hung on the tip of the board with four fingers from the top.
In addition, it is shaped so that it can be pressed with the hypothenar eminence so that it is easy to apply force from above.
The board is hollow and has holes in the front and slightly behind so that water can be taken in and out.
In addition, the buoyancy was set to slightly float from the neutral buoyancy, and a buoyancy body of the required volume was set inside so that it would not sink when the hand was released even in the sea.

1. 1. Left and right wing parts 2. Central wing part 3. The dented part of the grip that passes through the thumb 4. The part to be pressed with the base of the hand or the hypothenar eminence 5. Hole in the back to take in water 6. Front hole for draining water and air 7. Internal buoyancy body (dotted line display because it is invisible)

Claims (2)

A horizontally long board with a streamlined cross section, a swimming board with a hole in the main body and a handle part that can be made neutral buoyancy by taking in external water. A swimming board that supports water surface and underwater movement with a hollow resin or wooden blade with a streamlined cross section like a pectoral fin of a dolphin or orca.

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