JPH085730Y2 - fin - Google Patents

Description

[Detailed description of the device]

[0001]

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

[0002]

2. Description of the Related Art Conventionally, fins having a shape shown in FIGS. 5 and 6 have been known as fins used for swimming and diving. FIG. 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 fin shown in FIG. 5 is used as a bare foot, and the strap type fin shown in FIG. 6 is adjusted according to the size of the foot after the boot is put on. It is used by being fixedly attached by a possible strap.

The state diagrams of these in use are shown in FIGS. FIG. 7 is an underwater swimming state diagram when a conventional fin is used, and FIG. 8 is a standing posture diagram when the conventional fin is attached.

The conventional fin is attached to the foot, and as shown in FIG. 7, the legs are moved back and forth to increase the propulsive force underwater as compared with barefoot swimming, thereby facilitating forward movement. there were. Therefore, the propulsive force (velocity) is determined by the physical strength (leg strength) of each individual, the size of the fins, and the method of exercising the leg.

Generally, the fin fin portion 11 (1
1 ') The larger the area, the easier it is to increase the driving force. However, in order to increase the propulsive force using this, it is necessary to increase the momentum (leg force) accordingly. Therefore, unless the fins are selected according to the physical strength and leg strength, the load becomes large, which causes the leg muscles to be cramped or cramped. Furthermore, when using conventional fins, if you do not bend your knees and keep your legs straight up and down with a straight line between your thighs and ankles, if you do not follow the correct leg movement method, sufficient propulsive force for the amount of exercise will be obtained. On top of that (without advancing) leg muscles tend to get cramps and cramps. For this reason, in the diving class, etc., in the leg exercise method, bending the knee to move the leg is called "bicycle riding", and it is for this reason that careful guidance is given to move the leg without bending the knee. .

That is, in order to obtain a sufficient propulsive force in the 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, such muscles used to keep the leg in motion are rarely used in daily life, and the muscles of the leg tend to be tight and cramped, which is one of the causes of an accident.

Further, the standing posture when the conventional fin is attached is
Since the posture is as shown in FIG. 8, it is difficult to walk forward, and normally, the backward walking is taught when wearing. Therefore, not only on land but also in water, it may be necessary to walk underwater in order to feed the fish and take an underwater photograph, but the fin portion 11 in FIGS.
Of course, you can walk forward with the 11 'long fins,
It was difficult to maintain a standing posture. In addition, there are many people who cannot stand up in the pool or the like due to the resistance of the fins 11 and 11 'and are at risk of an accident.

[0009]

As described above, when the conventional fin is used, the knee must be bent and the thigh and the ankle must be straight to move the leg up and down. , Insufficient propulsive force was obtained for the amount of exercise, which caused leg muscles to be cramped or cramped. In addition, it is difficult to stand up and walk forward with the fins attached, which is also a cause of an accident. Therefore, the present invention has been made to solve the above drawbacks.

[0010]

On both sides of the tubular body to be mounted on Ashisune unit SUMMARY OF THE INVENTION, at angles against Shi inclined obliquely to the cylinder axis, and at least two pairs at a position opposed through the cylindrical shaped body blade And a stopper that can be attached and detached with one touch is provided.

[0011]

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 side surfaces of the tubular main body. In addition to the propulsive force obtained when used,
You can get the buoyancy of standing swim. Therefore, the momentum required to obtain a constant propulsive force is smaller than that of the conventional fin. Further, the load on the ankle is small, and it is possible to prevent the tension of the tibial muscle due to the fatigue of the leg. Also, it is possible to walk while wearing it, and it is possible to expand the range of activity in both land and land, making it easier to dive from the feet and work underwater. Further, for example, a stopper provided on the calf portion of the tubular main body allows one-touch attachment / detachment, and can be attached even on bare feet or a wet suit. Furthermore, since the size of the stopper can be adjusted, it can be used by both men and women and adults.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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.
Is a side view. 3 is a top plan view of the present invention, and FIG. 4 is an underwater swimming state view when the fins of the present invention are attached.

1 and 2, reference numeral 1 is a cylindrical fin body. The cylinder length of this fin body 1 is about 30 cm,
It is used by attaching it to the shin between the knee and ankle. Then, a blade group and a b blade group are formed on both side surfaces of the fin body 1, 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. Then, four blades are arranged in each of the blade groups a and b, and each blade in the blade group a is b
It is formed so as to face each blade of the blade group through the fin body 1. The blades 6, 7, 8 and 9 of the b blade group are arranged so as to have a smaller surface area than the blades 2, 3, 4, and 5 of the a blade group which face the blades.

In this 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. . Further, the blade group a includes each blade 2,
The widths of the blades 3, 4 and 5 are subtly changed to make the width of the blade 4 the widest, and a mountain-shaped curve is formed by the side lines of each blade. Further, in the b blade group as well, as in the a blade group, the width of the blade 8 facing the blade 4 is the widest among the four blades of the a blade group, and each blade 6, 7, 8, 9 is arranged. Is formed so as to draw a mountain-shaped curve slightly gentler than the blade group a.

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. Further, when changing the angle (α), the method of changing all the blades to a certain constant angle and the condition that the respective blades of the a and b blade groups face each other There is a method of subtly changing the angle of each blade in ascending order or in descending order, but both can adjust the propulsion force in various ways .

Further, as shown in FIG. 3, in the present embodiment, a one-touch removable stopper 10 is provided on the calf portion of the tubular main body. In this embodiment, it is provided at two places as shown in FIG. 2, but it may be provided at one place or at two or more places depending on the size of the stopper 10. However, considering the resistance of the fin blade of the present invention under 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.

Further, in the fin of the present invention thus formed, when the total surface area of each blade is the same as that of the fin portion 11 of the conventional fin, the propulsion obtained when the conventional fin 12 is used with the same momentum. You can get the buoyancy of a standing swim in addition to your strength. Therefore, the amount of momentum required to obtain a constant propulsive force is smaller than that of conventional fins, and when the fins of the present invention are used, sufficient propulsive force can be obtained even in a swimming method of bending the knee such as breaststroke. The same amount of exercise as when using the fins 12 enables swimming longer than before.

As described above, the fin according to the present invention has a shin on the attachment site, and it is possible to walk with the fin attached, to stand upright and to keep the knees without disturbing 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 enables one-touch attachment / detachment, it can be attached even from bare feet or a wet suit,
And since the stopper 10 can be adjusted in size,
It can be used by both men and women and adults and children. Further, when the fin of the present invention is used, propulsive force can be obtained in any of the longitudinal movements below the knee and the longitudinal and lateral movements. Therefore, it can be easily used even by an amateur diver or a beginner.

[0020]

As it has been described above devised], fin of the present invention is a tubular shape, at an angle to pair Shi inclined obliquely to the cylinder axis on both sides thereof, and two pairs in the position opposed through the cylindrical body Since
It is characterized in that the upper blade is arranged and a one-touch detachable stopper is provided on the upper blade.

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 muscles caused by fatigue of the leg are reduced. Tightness can be prevented. Furthermore, compared to the conventional toe fin, a blade having a larger area can be operated with the same effort, and the propulsive force can be increased with the same effort. In addition, the fin of the present invention allows walking while wearing the device, can extend the range of activity in both land and land, and can easily perform diving from the foot or working in water. In addition, it can be attached and detached with one touch by the stopper provided on the calf, and it can be worn not only when bare feet but also on the wet suit. 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] To 1. A both side surfaces of the tubular body to be mounted on Ashisune unit, at an angle to pair Shi inclined obliquely to the cylinder axis, and arranged two pairs or more blades to a position facing the through tubular body, further A fin characterized by being provided with a one-touch attachment / detachment stopper.