JPH0513471U - Fin - Google Patents

Abstract

(57) [Summary] [Purpose] To provide fins that can be easily used by people with weak ankles or leg strength and beginners, and that allow walking while wearing them. [Structure] At least a pair of blades facing each other through the tubular body are arranged on both side surfaces of the tubular body to be attached to the shins of the legs at a position other than a direction perpendicular to the tubular axis, and a calf portion is provided. It consists of a stopper that can be attached and detached with one touch. [Effect] The amount of exercise required to obtain a certain amount of propulsive force is smaller than that of conventional fins, and it can be easily used by people with weak ankles or leg strength and beginners, and walking while wearing it is also possible. , It is possible to widen the range of action when wearing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This device is used for diving and swimming, and relates to fins (flippers) for increasing propulsive force compared to bare feet.

[0002]

[Prior Art]

 Conventionally, fins having shapes shown in FIGS. 5 and 6 are known as fins used for swimming and diving. 5 is a perspective view of a full-fit type fin, and FIG. 6 is a perspective view of a strap type fin.

The full-fit type fins shown in FIG. 5 are used as bare shoes like shoes, and the strap-type fins shown in FIG. 6 are used according to the size of the foot after wearing boots. It is used by being fixedly attached by an adjustable strap.

A state diagram of these in use is shown in FIGS. 7 and 8. FIG. 7 is a diagram of a state of underwater swimming when using a conventional fin, and FIG. 8 is a standing posture diagram when a conventional fin is attached.

The conventional fins are attached to the feet, and by moving the legs back and forth as shown in FIG. 7, the propulsive force in water is increased compared to barefoot swimming, and the forward movement is facilitated. Met. Therefore, the propulsive force (velocity) was determined by the physical strength (leg strength) of each individual, the size of the fins, and the method of exercising the leg.

Generally, the larger the fin fin 11 (11 ′) area, the easier it is to increase the propulsive force. However, in order to increase the propulsive force using this, it is necessary to increase the momentum (leg force) accordingly. Therefore, if you do not select a fin that matches your physical strength and leg strength, the load will increase, causing leg muscles to cramp and convulsions. In addition, when using conventional fins, if you do not bend your knees and keep your leg straight up and down with your thighs and ankles, you have to follow the correct leg movement method. In addition, he / she does not move forward (progression) and tends to cause twitching or cramping of leg muscles. For this reason, in the diving class, etc., in the method of exercising the legs, bending the knees and moving the legs is called "bicycle riding", and it is for this reason that careful guidance is given to move the legs without bending the knees. .

That is, in order to obtain sufficient propulsive force in water using the conventional fin, it is necessary to keep the legs in a straight state and move up and down without bending the knees. However, the muscles used to maintain such leg movements are rarely used in daily life, and the muscles in the legs tend to become tight and cramps, which contributes to an accident.

[0008] Furthermore, it is difficult to walk forward because the conventional standing posture when wearing fins is as shown in FIG. 8, and normally, walking backward when wearing is taught. ing. Therefore, underwater as well as on land may require underwater walking to feed fish and take underwater photographs, but with the long fins of fins 11 and 11 'in Figs. It was difficult not only to walk forward but to maintain a standing posture. Also, in the pool, etc., many people are at risk of an accident because they cannot get up due to the resistance of the fins 11 and 11 '.

[0009]

[Problems to be solved by the device]

 In this way, when using conventional fins, the knee must be bent and the thigh and ankle must be in a straight line to move the leg up and down. I couldn't get enough strength, causing leg muscles to cramp and cramps. In addition, it is difficult to stand up and walk forward with the fins attached, which also caused an accident. Therefore, the present invention has been made to solve the above drawbacks.

[0010]

[Means for Solving the Problems]

 At least one pair of blades are arranged on both sides of the tubular body to be attached to the leg and shin, at an angle parallel or inclined to the tubular axis and facing each other through the tubular body. It is characterized by being provided with a stopper capable of

[0011]

[Action]

 The fin according to the present invention is a mechanism in which the fin is attached to the leg and the propulsive force is obtained by the blades formed on both sides of the tubular main body, so the conventional fin is used with a certain constant momentum. In addition to the propulsive force obtained in some cases, the buoyancy of standing swim can be obtained. Therefore, the momentum required to obtain a constant propulsive force is smaller than that of the conventional fin. Furthermore, the strain on the ankles is small, and the tension of the tibial muscles caused by fatigue of the legs can be prevented. Moreover, it is possible to walk while wearing it, and it is possible to expand the range of activity as well as land and land. Also, for example, a stopper provided on the calf portion of the tubular body allows one-touch attachment / detachment, and can be attached even on bare feet or a wet suit. Further, since the stopper can be adjusted in size, it can be used by both men and women and adults and children.

[0012]

【Example】

 The fin of the present invention will be described in detail below with reference to an embodiment.

FIG. 1 is a front view of the fin of the present invention, and FIG. 2 is a side view thereof. 3 is an upper plan view of the present invention, and FIG. 4 is an underwater swimming state diagram when the fins of the present invention are attached.

In FIGS. 1 and 2, reference numeral 1 is a tubular fin body. The fin body 1 has a tube length of about 30 cm, which is attached to the shin between the knee and ankle for use. Then, a blade group and a b blade group are formed on both side surfaces of the fin body 1 described above, respectively. The a blade group is formed on the outside of the shin, and the b blade group is formed on the inside of the shin. Four blades are arranged in each of the blade groups a and b, and each blade of the blade group a is formed so as to face each blade of the blade group b through the fin body 1. There is. Each of the blades 6, 7, 8 and 9 of the b blade group is arranged so as to have a smaller surface area than the blades 2, 3, 4 and 5 of the a blade group facing the blades.

In the present embodiment, the number of blades of the a blade group and the b blade group is four, and each blade is arranged at a predetermined inclination angle (α) with respect to the cylinder axis of the fin body 1. There is. In the a-blade group, the widths of the blades 2, 3, 4, and 5 are subtly changed to make the width of the blade 4 widest, and a mountain-shaped curve is formed by the side line of each blade. In the b-blade group, as in the a-blade group, the width of the blade 8 facing the blade 4 is set to be the widest among the four blades in the a-blade group, and the blades 6, 7, 8, It is formed so as to draw a mountain-shaped curve which is slightly gentler than the blade group a by the lateral line of 9.

Further, the magnitude of the propulsive force can be changed by appropriately changing the formation inclination angle and the number of blades of these blades. Furthermore, in changing the angle (α), a method of changing all the blades to a certain angle in various ways, and a condition that each blade of the a and b blade groups face each other, There is a method of subtly changing the angle of each blade in ascending or descending order of sign of each blade, but both can adjust the propulsion force in various ways. If the inclination angle of each blade is α ≠ 90 ° with respect to the cylinder axis, even if α = 0, that is, even if it is parallel to the cylinder axis of the cylindrical main body, it is the same as the above-mentioned inclined blade. You can get the effect.

Further, as shown in FIG. 3, in this embodiment, a one-touch removable stopper 10 is provided on the calf portion of the tubular main body. In this embodiment, it is provided in two places as shown in FIG. 2, but it may be provided in one place or two or more places depending on the size of the stopper 10. However, considering the resistance of the fin blade of the present invention in water, it is necessary to further form the stopper 10 so that there is no gap between the leg and the tubular main body 1.

In addition, in the fin of the present invention thus formed, when the total surface area of each blade is the same as the fin portion 11 of the conventional fin, the fin can be obtained with the same momentum when the conventional fin 12 is used. In addition to the propulsion force, you can obtain the buoyancy of a standing swim. Therefore, the amount of momentum required to obtain a certain amount of propulsive force is smaller than that of conventional fins, and when the fins according to the present invention are used, sufficient propulsive force can be obtained even in a swimming method such as breaststroke that bends the knee. This makes it possible to swim longer than before with the same amount of exercise as when using the conventional fin 12.

As described above, the fin according to the present invention is attached to the shin, so that it is possible to walk with the fin attached, to stand upright and to stop knees without hindering the original function of the foot. Yes, it is possible to expand the range of activities such as entry, land work, and underwater work. Further, since the fastener 10 formed on the calf portion of the fin of the present invention allows one-touch attachment / detachment, it can be attached from bare feet or a wet suit, and the fastener 10 can be adjusted in size. Therefore, it can be shared by both men and women and adults. Further, when the fin of the present invention is used, propulsive force can be obtained in any of the longitudinal movements below the knees and the longitudinal and lateral movements. Therefore, even an amateur diver or a beginner can use it easily.

[0020]

[Effect of the device]

 As described above, the fin of the present invention has a tubular shape, and has at least a pair of blades on both sides thereof at an angle parallel or inclined with respect to the tubular axis and facing each other through the tubular body. It is characterized in that it is provided with a one-touch removable fastener.

Therefore, when the fin of the present invention is used, the amount of exercise required to obtain a constant propulsive force is smaller than that of the conventional fin, the load on the ankle is reduced, and the tibial muscle caused by fatigue of the leg is reduced. You can prevent twitches. Furthermore, as compared with the conventional toe fin, it is possible to operate a blade having a larger area with the same effort, and it is possible to increase the propulsive force with the same effort. In addition, the fin of the present invention allows walking while wearing it, can extend the range of activity both in land and water, and can easily perform diving from the foot or working in water. In addition, it can be attached / detached with one touch by the stopper provided on the calf part, and it can be attached not only when bare feet but also above the wet suit. Also, since the size of the stopper can be adjusted, it can be used by both men and women and adults.

[Brief description of drawings]

FIG. 1 is a front view of a fin of this embodiment.

FIG. 2 is a side view of the fin of this embodiment.

FIG. 3 is an upper plan view of the present embodiment.

FIG. 4 is an underwater swimming state diagram when the fin of the present invention is used.

FIG. 5 is a perspective view of a conventional full-fit type fin.

FIG. 6 is a perspective view of a conventional strap fin.

FIG. 7 is a diagram of underwater swimming when using a conventional fin.

FIG. 8 is a standing posture state diagram when a conventional fin is attached.

[Explanation of symbols]

 1 Fin Main Body 2 Blade 3 Blade 4 Blade 5 Blade 6 Blade 7 Blade 8 Blade 9 Blade 10 Stopper

Claims (1)

[Scope of utility model registration request] 1. At least a pair of blades are arranged on both side surfaces of a tubular main body to be attached to the shin of the leg at an angle parallel to or inclined with respect to the tubular axis and at a position facing each other via the tubular main body. A fin characterized by being provided with a one-touch removable stopper.