JPH11164911A - Diving fins - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide diving fins where a fin part is changed-over by one operation in a horizontal position where the fin part is extended horizontally when the fins are used underwater or in an erected position where the fin part is erected at the time of walking on a ship or the ground, and also water resistance is drastically reduced at the time of usage and rapid propulsive force is obtained under the water. SOLUTION: The diving fins consist of a boot part 2 where a human foot is put in/out and the fin part 4 arranged in the tip of the boot part 2. Then, a supporting means 5 for rotatably supporting the fin part 4 toward the tip side and the rear end side of the boot part 2 is provided and also a fixing means 10 is provided, which is for fixing the fin part 4 in the respective positions which are the horizontal one where the fin part 4 is extended toward the tip side of the boot part 2 and the erected one where the fin part 4 is erected toward the rear end side of the booth part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diving fin which can be attached to a person's foot during diving to obtain a thrust underwater.

[0002]

2. Description of the Related Art Divers diving after equipping their bodies with a number of instruments and the like in response to the conditions of underwater (seawater and freshwater). In order to obtain efficient propulsion underwater, diving fins are often mounted.

Conventionally, in this type of diving fin, a boot portion through which a human foot can be pierced and a fin portion provided at the tip of the boot portion are often integrally formed of rubber or the like. . The fin portion is provided at the distal end of the boot portion so as to extend horizontally from the distal end, and is formed in a substantially fan shape that is thinner than the boot portion and gradually widens toward the distal end side. Further, between the boot portion and the fin portion, there is formed a water drainage hole penetrating to the front and back of the diving fin.

[0004]

In the above-mentioned conventional diving fin, since the boot portion and the fin portion are integrally formed, for example, the following inconveniences have occurred. That is, 1) When moving from onboard or from land to water entry with the diving fins attached to the feet, the tip of the fin part is long, so even a small obstacle may fall over, or the tip of the fin part may be flat even in a flat place. Walking was extremely difficult, such as being caught.

[0005] 2) Usually, when going up to the ship from underwater,
Although a ladder (ladder) provided on the ship is used, it is difficult for the diving fins to stay on the rudder when the fins are attached to the feet because the fin ends interfere. For this reason, diving fins are temporarily removed from the feet in the water away from the rudder, and the people on the boat are then swam up to the rudder. However, in performing such work, there is an inconvenience that the diver is difficult to control the body because of the equipment worn (particularly, heavy equipment such as an oxygen cylinder).

The present invention can solve the above-mentioned inconveniences. When the diving fins are used in water, the fins are in a horizontal position where the fins extend horizontally, and when walking on a ship or on land. It is another object of the present invention to provide a diving fin which can be switched to a standing position where a fin portion stands up with one touch.

Another object of the present invention is to provide a diving fin capable of remarkably reducing the resistance of water during use and obtaining a remarkable propulsion force in water.

[0008]

SUMMARY OF THE INVENTION Among the diving fins of the present invention, the diving fin according to the first aspect of the present invention comprises a boot part which can be pierced by a human foot, and a fin part provided at the tip of the boot part. And a diving fin comprising: a fin portion rotatably supported by the boot portion with respect to the boot portion by a supporting means; and a horizontal position at which the fin portion extends toward a tip end side of the boot portion. The fin portion is provided with fixing means for fixing the fin portion at each of an upright position rising toward the rear end side of the boot portion.

According to a second aspect of the present invention, in the first aspect, the support means is provided at each of a front end of the boot portion and a rear end of the fin portion, and a width of the diving fin is provided. A cylindrical body that is arranged along the direction and has a gap between adjacent ones, and a shaft that is inserted into the cylindrical body and connects both the boot portion and the fin portion. Comprises a notch groove cut out so as to penetrate the inner and outer surfaces of the cylindrical body, and a projection protruding from the peripheral surface of the shaft and located in the notch groove, wherein the notch groove A first notch groove that engages with the protrusion when the fin portion is in the horizontal position, a second notch groove that engages with the protrusion when the fin portion is in the upright position, And a third notch groove communicating with the second notch groove. It is.

According to a third aspect of the present invention, in the second aspect of the invention, the first and second cutout grooves are formed along the axial direction of the cylindrical body and spaced apart in the same circumferential direction. On the other hand, the third notch groove is formed along the circumferential direction of the tubular body and between the first and second notch grooves, and the first and second notch grooves have a groove width. It is characterized by having a step portion that is cut out wide.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the first and second cutout grooves are formed so as to extend from the third cutout groove in a width direction of the diving fin. It is characterized by extending to the same side.

According to a fifth aspect of the present invention, in the first aspect of the present invention, a part of a rear end side of the fin portion is cut so that the front and back sides of the fin portion are cut. A notch hole to be penetrated is formed, and a notch fin that engages with the notch hole is provided, and the notch fin is configured to be pivotable toward a front end side and a rear end side of the boot portion. Features.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. In this description, one of the pair of diving fins 1 will be described. First Embodiment FIGS. 1 to 6 show a first embodiment of a diving fin 1 according to the present invention. In these figures, reference numeral 2 denotes a boot portion through which a person's foot is pierced. The boot portion 2 includes a body that accommodates a person's foot and covers from the fingertip to the ankle, and a heel presser 3 is provided. The body is not provided with a place for accommodating the heel of the foot. In other words, the heel side is exposed while the boot part 2 is worn, and the heel side is pressed by the heel presser 3.

The heel presser 3 comprises a belt presser 3a fixed to each of the left and right sides of the boot portion 2 main body, and a belt 3b attached to the belt presser 3a. Belt 3
b has both ends attached to the left and right belt pressers 3 a, respectively, and is disposed over the rear of the boot portion 2.
The belt presser 3a can fix the belt 3b at a desired position in a state where the belt 3b is expanded and contracted in the longitudinal direction, so that the length of the belt 3b can be adjusted according to the size of a human foot. It has become.

A fin portion 4 is attached to the tip of the boot portion 2 via a support structure 5 so as to be swingable. More specifically, the fin portion 4 is a thin flat plate,
In particular, it is formed in a substantially fan shape gradually widening from the rear end side to the front end side. And, on the rear end side of the fin portion 4,
In this embodiment, two through holes 4a for water penetrating in the thickness direction are formed.

The support structure 5 includes a cylindrical body 6 fixed to the front end of the boot 2 and the rear end of the fin 4, respectively, and a shaft 7 that can be inserted into the cylindrical body 6. Cylindrical body 6
Are provided side by side in the width direction of the diving fin 1 (hereinafter, this is referred to as a lateral direction).
a and 6b are fixed to the fin portion 4 and the intermediate portion 6c is fixed to the boot portion 2 with side portions. There is a gap between the adjacent cylindrical bodies 6, and the gap is provided according to the displacement length by which the fin unit 4 is offset when the fin unit 4 is turned.

By inserting the shaft 7 into each of the cylindrical portions 6, the boot portion 2 and the fin portion 4 are connected, and the fin portion 4 is connected to the front and rear ends of the boot portion 2. It is possible to turn toward the side. The cylindrical portion 6 may be provided one at a time at the tip of the boot portion 2 and at the rear end of the fin portion 4, or may be provided at three or more in number. It is only necessary that both the part 2 and the fin part 4 can be connected.

The support structure 5 is provided with a fin portion 4 fixing structure 10 having the following configuration. That is, as shown in detail in FIGS. 4 and 5, the fixing structure 10 has a cylindrical portion 6 (6
c) a cut groove 11 cut through the inner and outer surfaces, and a projection 12 protruding and fixed to the surface of the shaft body 7 and positioned in the cut groove 11. In this embodiment, the fixing structure 10 is provided only at the intermediate portion 6c of the three cylindrical portions 6. However, the fixing structure 10 may be provided at any other one of the cylindrical portions 6, or may be provided at each of the cylindrical portions 6. May be provided for each.

The cut groove 11 is formed by continuously forming the following first and third cut grooves 13 to 15. That is, the first cut groove 13 extends along the lateral direction (the axial direction of the cylindrical body 6), and when the fin portion 4 is in the horizontal position extending toward the distal end side of the boot portion 2, the protrusion 12 Engage with. The second cut groove 14 extends along the lateral direction (the axial direction of the cylindrical body 6), and when the fin portion 4 is in the standing position in which the fin portion 4 stands up toward the rear end side of the boot portion 2,
Engage with 2. Of course, these first and second notched grooves 13 and 14 are formed apart from each other in the circumferential direction of the cylindrical body 6.
Further, the third notch groove 15 extends along the circumferential direction of the cylindrical body 6 between the first and second notch grooves 13 and 14.

Also, the first and second notched grooves 13 and 14
Each has a stepped portion 13 in which the groove width is cut out wide.
a and 14a are formed. These steps 13a, 14a
When the projection 12 comes into contact with the first notch, the transfer of the projection 12 from the first and second notch grooves 13 and 14 to the third notch groove 15 is prevented.

Next, the diving fin 1 having the above structure
An example of use will be described. The diver attaches the boot 2 to each of the feet. At this time, the belt 3b of the heel presser 3 is adjusted according to the size of each individual's foot so that the belt 3b does not come off. Then, when walking on the ship or on land until reaching the water, for example, the fin portion 4 is grasped by hand, and the fin portion 4 is turned toward the rear end side of the boot portion 2 with the shaft 7 as a starting point, and the second notch is formed. The protrusion 12 is engaged with the groove 14.
At this time, the fin portion 4 is in the standing position, and the boot portion 2 is placed on the ship or on the land surface when walking.
Only the bottom will come into contact.

When diving from this state, the fin portion 4 is grasped again by hand, and the second notch groove 14 and the projection 12
Is released, and while the projection 12 is moved in the third notch groove 15, it is turned toward the tip side of the boot portion 2 from the shaft body 7 as a starting point. Protrusion 12
Is engaged. At this time, the fin unit 4 is at a horizontal position extending in the horizontal direction, and is in a normal use state during diving. When the projection 12 is transferred from the first and second notch grooves 13 and 14 to the third notch groove 15, each cylindrical body 6
Since the gap is provided between (6a to 6c), the fin portion 4 is slightly offset in the lateral direction, so that the fin portion 4 is smoothly moved.

Here, the engagement between the first and second notch grooves 13 and 14 and the projection 12 is inadvertently released regardless of whether the fin portion 4 is in the upright or horizontal position. Never. That is, since the wide steps 13 a and 14 a are formed in the grooves 13 and 14, the protrusion 12 can be moved to one of the wide portions (that is, in the circumferential direction of the cylindrical body 6) by the weight of the fin 4. Move to one of the widened). As a result, the projections 12 are turned into the steps 13a and 14a.
a, so that the movement in the lateral direction is prevented.

The above-mentioned notch groove 11 is different from the third notch groove 15 in the first and second notch grooves 13 and 14.
Is formed in a U-shape extending on the same side in the horizontal direction (see FIG. 6A), and a Z-shape extending on the opposite side in the same horizontal direction (see FIG. )). However, the U-shape has the following advantages. That is, the diving fin 1 shown in FIG. 1 is attached to the left foot, and another diving fin having a fixing structure formed symmetrically with the fixing structure 10 of the diving fin 1 is attached to the right foot. In this case, at each of the standing and horizontal positions of the fin portion 4, the shaft body 7 protrudes to the left and right in the lateral direction. Therefore, especially when walking, the shaft 7 does not protrude between both feet, and this does not hinder walking.

As described above, according to the diving fin 1 according to the first embodiment of the present invention, the fin portion 4 is horizontally moved according to the use in the water and the walking on the boat or on the land. The user can switch between a horizontal position extending to the right and a standing position where the user stands up with one touch. Therefore, while wearing the diving fins 1, it is possible to perform walking very well before entering water from the ship or land, and
The complicated work conventionally performed from underwater to ladder can be eliminated.

[Second Embodiment] Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. In the diving fin 21 described in the second embodiment, a part of the rear end side of the fin portion 4 in the diving fin 1 in the first embodiment described above is cut, and this cut is performed. There are two cut holes 4b and two notch fins 22 that engage with the notch holes 4b. The notch fins 22 are provided so as to be pivotable from the front end side of the boot portion 2 toward the rear end side. Other configurations include the diving fin 1
Therefore, the description is omitted.

According to such a diving fin 21, particularly when used underwater (when the fin portion 4 is at a horizontal position).
In, the cutting fins 22 swing in accordance with the movement of the foot. Due to this rocking, water flows into the notch hole 4 of the fin portion 4.
Go through b. Specifically, when the foot is moved from the upper side to the lower side, water passes from the front side to the rear side of the fin portion 4, and when the foot is moved from the lower side to the upper side, the water moves from the back side of the fin portion 4 to the front side. And the water passes through. At this time, of course, water also passes through the through hole 4a. Therefore, the resistance of water during use can be further reduced as compared with the case where only the through hole 4a is simply formed, and a remarkable propulsion force underwater can be obtained.

[0028]

As is clear from the above description, according to the diving fin of the present invention, since the fin portion is configured to be pivotable, it can be used underwater and when walking on a ship or on land. Can be switched with one touch between the horizontal position where the fins extend horizontally and the standing position where the fins stand up. Walking can be performed extremely easily, and complicated operations from underwater to ladder can be eliminated. Also,
By providing the cutting fins, the resistance of water during use can be further reduced, and a remarkable propulsion underwater can be obtained. Further, when the first and second cut grooves extend in the same direction, an effect that the shaft does not obstruct walking can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a diving fin described in a first embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an exploded perspective view of the same.

FIG. 4 is a perspective view showing details of the fixing structure.

FIG. 5 is a view showing a cross section of FIG. 4, and FIG.
X-ray cross-section, FIG. 2B is a Y-Y cross-section, FIG.
Is a sectional view taken along the line ZZ, and FIG. 4D is a sectional view taken along the line WW.

6A and 6B are diagrams showing details of the fixing structure described in the first embodiment of the present invention, and FIG. 6A is a plan view when a notch groove is formed in a U-shape, and FIG. () Is a plan view when the notch groove is formed in a Z-shape.

FIG. 7 is a perspective view showing a diving fin described in a second embodiment of the present invention.

FIG. 8 is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 21 Diving fin 2 Boot part 4 Fin part 4b Notch hole 5 Support structure 6 (6a, 6b, 6c) Cylindrical body 7 Shaft body 10 Fixing structure 11 Notch groove 12 Projection 13 First notch groove 13a Step 14 Second notch groove 14a Step 15 Third notch groove 22 Notch fin

Claims (5)

[Claims] 1. A diving fin comprising: a boot portion through which a human foot can be pierced; and a fin portion provided at a tip of the boot portion, wherein the fin portion is pivoted with respect to the boot portion by a support means. The fin portion is supported at each of the fin portions at a horizontal position where the fin portion extends toward the front end side of the boot portion, and an upright position where the fin portion rises toward the rear end side of the boot portion. A diving fin comprising fixing means for fixing. 2. The supporting means is provided at each of a front end of the boot portion and a rear end of the fin portion, and has a gap between adjacent ones of the diving fins arranged in a width direction. A cylindrical body and a shaft inserted into the cylindrical body and connecting both the boot portion and the fin portion, while the fixing means is notched so as to penetrate through the inner and outer surfaces of the cylindrical body. And a projection protruding from the peripheral surface of the shaft and located in the notch groove, wherein the notch groove engages with the projection when the fin portion is in the horizontal position. A first notch groove, a second notch groove that engages with the projection when the fin portion is at the upright position, and a third notch groove that connects the first and second notch grooves. The diving fin according to claim 1, wherein 3. The first and second cutout grooves are formed along the axial direction of the cylindrical body and separated from each other in the same circumferential direction, while the third cutout groove is formed in the cylindrical shape. The first and second notch grooves are formed along the circumferential direction of the body and between the first and second notch grooves, and the first and second notch grooves have a stepped portion having a wide groove width. The diving fin according to claim 2. 4. The diving fin according to claim 2, wherein the first and second notch grooves extend from the third notch groove to the same side in the width direction of the diving fin. The fin for diving according to the above. 5. The fin portion is provided with a notch formed by cutting a part of a rear end side thereof so as to penetrate the front and back of the fin portion, and a notch fin engaging with the notch is provided. The diving fin according to any one of claims 1 to 4, wherein the cutting fin is configured to be pivotable toward a front end side and a rear end side of the boot portion.