JPH0833738A - Swimming training board - Google Patents

Abstract

PURPOSE:To provide a swimming training board which can be used effectively for a practice in backstroke, and used as an auxiliary tool for aquarelaxation and underwater stretch, and by which swimming exercise by floating facing downward can be conducted more precisely than before. CONSTITUTION:A swimming training board has a straight line central groove part 3 which forms a valley on one board surface and straight line side ridge parts 5, 7 which are provided side by side on both sides of the central groove part 3 and form a valley on the other board surface, and its cross section is like an inverted-W shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swimming practice board generally called a beat board.

[0002]

2. Description of the Related Art Beet boards for swimming practice, which are made of foamed resin or the like, are well known and are often used in swimming practice in a swimming pool. The conventional beat plate is a flat plate, and practice such as kicking by placing both arms extended forward in the state of lying down, which is the basic posture of the prone swim technique such as crawling, breaststroke, and butterfly, on the beat plate. , It is used for practicing one-handed crawling and board one-handed butterfly by putting one hand on a beat board.

[0003]

The conventional flat beet board is uniformly satisfactory for use in the prone state, but it can be placed under an arm in the prone state. It is difficult to use, and even if you use it with the beat plate fitted in your hand, it is not suitable for backstroke practice because your shoulders fall and your basic posture collapses.

As a backstroke exercise, there is a back-lifting kick in which a beat board is held on the abdomen by the hand, but this is the most important basic posture in swimming practice (extend both arms forward, from your fingertips to your feet). Up to a straight line) cannot be created. In addition, holding the beat board in your hand puts extra force on your body. The present invention has been made by paying attention to the above-mentioned problems in the conventional beat board, can be effectively used for backstroke practice, and can perform the swim practice by lying down more accurately than the conventional practice. It is intended to provide a swimming practice board that can be used as an auxiliary tool such as aqua relaxation and underwater stretching.

[0005]

In order to achieve the above-mentioned object, a swimming practice plate according to the present invention has a straight central groove portion having a valley shape on one plate surface and both sides of the central groove portion. It is characterized in that it has parallel straight side ridges that are provided in parallel with each other on the opposite plate surface to the one plate surface and have a valley shape, and the cross-sectional shape is an inverted W shape. .

The size of this swimming practice plate is 300 in width.
˜550 mm, front-rear length is about 100-450 mm, thickness is about 10-40 mm, and central groove 3, side ridges 5, 7 may have valley depths of about 5-150 mm. It may be selected according to the height, weight, and physique of users from infants to adults. This swimming practice plate is a material having a specific gravity of about 0.10 to 0.30 g / cm ³ as a buoyancy plate, for example, cross-linked polyethylene, polypropylene, a copolymer of ethylene / styrene, a closed cell foam such as polystyrene, or chloride. It is composed of a closed-cell foam material such as vinyl or urethane with a closed film formed on the surface. It is preferable that it does not deform easily during use and retains its initial shape so that it does not feel discomfort during mounting and elasticity. It is good to have a sex.

[0007]

[Operation] According to the above-mentioned configuration, when practicing backstroke, with one of the plate surfaces as the upper surface, the head is placed in the valley-shaped central groove, and both arms extended forward in this state. Insert it in the valley formed by the lower bottom side (back side) of the ridge. As a result, the relationship between the head and the arms extending straight ahead is fixed in a state where the back is lifted.

[0008] Also, with the one plate surface as the upper surface, the abdomen portion in the prone floating state, the occipital region of the back floating state, the waist portion are placed in the valley-shaped central groove portion, or in the inverted state with the opposite plate surface as the upper surface, By placing the thighs and arms in the prone or floating state on the valley-shaped side ridges, each part of the body fits with the swimming practice board, and the swim practice plate is used in a stable state.

[0009]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 3 show an embodiment of a swimming practice board according to the present invention. The swimming practice board is generally designated by reference numeral 1 and has a straight central groove portion 3,
It has straight side ridges 5 and 7 provided in parallel on the left and right sides of the central groove portion 3, respectively.

The central groove portion 3 has a valley shape of an arc-shaped cross section on one plate surface A, and the side ridges 3 and 5 each cross an arc shape on a plate surface B opposite to the plate surface A. It has a valley shape on the surface, and it is an inverted W as a whole.
It has a cross-sectional shape. The front edge of the swimming practice plate 1 has a tongue-shaped streamline on both sides of the central portion of the central groove 3 in the width direction, and the planar shape of the swimming practice plate 1 has a shape like a seagull with its wings spread. ing. The outer peripheral edge of the swimming practice board 1 has chamfered corners and is rounded.

As a result, the resistance of the swimming practice plate 1 to water is reduced, and the reduction of swimming speed when the swimming practice plate 1 is used is reduced. In addition, because the plane shape of the swimming practice plate 1 is a seagull-like shape, infants and children are interested in the shape, and there is also a side effect of using the swimming practice plate 1 more positively. can get.

The size of the swimming practice board 1 has a width W of 454.
mm, the front-rear length L is 237 mm, the thickness T is 30 mm, the valley depth H ₁ of the central groove portion 3 is 35 mm, and the valley depth H ₂ of the side ridge portions 5 and 7 is 55 mm. The swimming practice board 1 is formed by laminating 20-fold expanded cross-linked polyethylene sheets, and punching the laminated body into a predetermined plane shape.
Bend into an inverted W-shaped cross section by hot pressing,
The outer peripheral corners are chamfered.

As an example of use, in the practice of backstroke,
As shown in FIGS. 4 and 5, with the plate surface A as the upper surface, the head is placed on the central groove portion 3, and both arms extended forward are placed under the side ridge portions 5 and 7 in this state. Put in the valley formed by the bottom side. As a result, the relationship between the head and the arms that extend straight forward is fixed when the back is lifted, and the back muscles are stretched to prevent hip breakage, and the basic posture for back lifting is maintained reasonably and accurately. Be done. In addition, this stretching of the spine also provides an underwater stretching effect.

As shown in FIG. 6, one back of the swimming practice board 1 having the board surface A as its upper surface is placed on the central groove portion 1 with the back of the back in a floating state and the board surface A is taken as the upper surface. Place one swimming practice plate 1 under the waist, fit the waist to the central groove 3, and place the other swimming practice plate 1 with the plate surface B as the upper surface under both thighs. Left and right thighs,
By fitting the left and right side ridges 5 and 7 forming a valley shape, the back can be stably lifted in a weakened state.

Lifting your back in a state of weakness is an important practice in mastering backstroke. In addition, the lifting of the back in the state of weakness has an aqua relaxation effect. As shown in FIG. 7, with the plate surface B as the upper surface, both hands in the state of being turned upside down can be fitted to the left and right side ridges 5 and 7, and a kick can be practiced by turning the face up. it can.

In this case, the swimming practice plate 1 can be supported in a stable state by fitting the left and right side ridges 5 and 7 in which both hands have a valley shape, and the arm can be supported without exerting any force on the body. You can easily get the basic posture of stretching and lying down. In addition to the above-mentioned use examples, by using the plate surface A as the upper surface, one hand may be placed on the valley-shaped central groove portion 3 for practicing the abdomen in the prone state, the board one-handed crawl or the board one-handed butterfly, or the plate surface. It is also possible to use it by turning the upper part of B upside down and placing the thighs and arms that are lying down and floating on the valley-shaped side ridges. It will be performed in a stable state where the plate 1 is fitted.

[0017]

As can be understood from the above description, according to the swimming practice plate of the present invention, the cross-section has an inverted W shape and is wavy, so that it is possible to practice backstroke and to lie down while the back is floating. It can be effectively used for various swimming exercises due to floating, and the use range is wider than the conventional one.

Further, by fitting each part of the body to the valley formed by the wavy shape, the swimming practice board is used in a stable state, and various swimming exercises can be performed more accurately. In addition to this, aqua relaxation It will also be used as an auxiliary tool for underwater stretching.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a swimming practice board according to the present invention.

FIG. 2 is a front view showing an embodiment of a swimming practice board according to the present invention.

3A is a cross-sectional view taken along the line aa of FIG.
(B) is sectional drawing which followed bb of FIG.

FIG. 4 is an explanatory view showing a usage example of a swimming practice board according to the present invention.

FIG. 5 is an explanatory diagram showing a usage example of a swimming practice board according to the present invention.

FIG. 6 is an explanatory view showing another example of use of the swimming practice board according to the present invention.

FIG. 7 is an explanatory view showing another example of use of the swimming practice board according to the present invention.

[Explanation of symbols]

 1… Swimming practice board 3… Center groove 5, 7… Side ridge

Claims (1)

[Claims] 1. A straight central groove portion having a valley shape on one plate surface, and parallel grooves provided on both sides of the central groove portion, and having a valley shape on a plate surface opposite to the one plate surface. A swimming practice board characterized by having a straight side ridge which forms a cross section and having an inverted W-shaped cross section.