RU2652601C1 - Paddle for rowing on canoe - Google Patents

Abstract

FIELD: shipbuilding.

SUBSTANCE: invention relates to shipbuilding and concerns paddles for rowing on canoes. Paddle for canoeing contains a blade and a spindle with a handle in the upper part. Spindle is executed with a bend, and its lower part is displaced horizontally relative to the geometric center of the blade area. Bending of the spindle is made due to the slope of its upper part towards the displacement of the lower part. Upper part of the spindle and the blade are located in the same vertical plane.

EFFECT: increase in rowing efficiency is achieved due to the ergonomic design of the paddle providing a more comfortable position of the athlete's body during the stroke.

1 cl, 2 dwg

Description

The invention relates to shipbuilding and relates to oars for canoeing.

A paddle for canoeing is known containing a blade and a spindle with a handle in the upper part (see US patent No. 3970032, publication date 07/20/76).

As the closest analogue, a paddle for canoeing is adopted, containing a blade and a spindle with a handle in the upper part, and the spindle is made with a bend (see USSR AS No. 992320, publication date 01/30/83).

The disadvantage of analogues is the low rowing efficiency due to the asymmetric landing of the athlete in a canoe.

During the stroke, the oar is located almost vertically - parallel to the diametrical plane. In this case, the athlete's hands should be located on this vertical. The arm closest to the board along which the stroke occurs is in its natural position, which ensures maximum force is applied to the oar. At the same time, the second hand is located vertically and horizontally in such a way as to reach the upper end of the vertically located handle, which forces the athlete to tilt the body towards the side along which the stroke occurs. In general, the provisions of the body and arms of the athlete during the stroke do not provide the realization of all the physical abilities of the athlete, although they are the best for the canoeing method with conventional paddle and canoe designs.

The problem to which the invention is directed, is to create an ergonomic paddle design that provides a more comfortable position of the athlete's body during the stroke, contributing to the maximum use of his physical capabilities.

The technical result achieved when solving the problem is expressed in increasing the efficiency of rowing due to the ergonomic design of the paddle, providing a more comfortable position of the athlete's body during the stroke.

The problem is solved in that in the oar for rowing in a canoe containing a blade and a spindle with a handle in the upper part, the spindle is made with a bend, the lower part of the spindle is shifted horizontally relative to the geometric center of the area of the blade, and the bend of the spindle is made due to the slope of its upper parts towards the displacement of the lower part, in addition, the upper part of the spindle and the blade are located in one vertical plane.

A comparative analysis of the set of essential features of the proposed technical solution and the set of essential features of the prototype and analogues indicates its compliance with the criterion of "novelty".

In this case, the distinguishing features of the claims solve the following functional tasks.

The sign “the lower part of the spindle is displaced horizontally relative to the geometric center of the blade area” allows you to shift the handle of the paddle closer to the diametrical plane and thereby the athlete will be able to take a more convenient vertical position, which ensures the application of maximum force applied to the paddle.

The sign “bend of the spindle is performed due to the bias of its upper part towards the displacement of the lower part” allows you to compensate for the effect of the torque arising from the eccentricity of the attachment of the lower part of the spindle to the blade.

The sign “the upper part of the spindle and the blade are located in one vertical plane” ensures the position of the athlete’s hands in a common plane perpendicular to the diametrical plane of the canoe.

Figure 1 shows a General view of the oars.

Figure 2 shows a side view of an athlete with an oar during a stroke along the port side of a canoe.

The drawings show the blade 1, the upper 2 and lower 3 parts of the spindle, the handle 4, the geometric center 5 of the area of the blade 1, the side of the canoe 6.

The drawings also indicate:

P ₁ - the force of water pressure on the blade 1;

P ₂ - the force exerted on the handle 4 during the stroke with the hand closest to the board along which the stroke occurs;

P ₃ - the force exerted on the lower 3 part of the spindle during a hand stroke, farthest from the side along which the stroke occurs;

b ₁ - the eccentricity between the geometric center 5 of the area of the blade 1 and the lower part 3 of the spindle.

The oar contains a blade 1, a spindle consisting of upper 2 and lower 3 parts, and a handle 4 located in the upper part of the oar.

The lower part 3 of the spindle is displaced horizontally relative to the geometric center 5 of the area of the blade 1.

The bend of the spindle is made due to the slope of its upper part 2 towards the displacement of the lower part 3.

The upper part 2 of the spindle and the blade 1 are located in one vertical plane.

The inventive paddle is used as follows.

To accommodate in the canoe, the athlete kneels on the right foot, if he is right-handed, and the left leg, bent at the knee, rests his foot on the bottom of the canoe. For left-handed people, it’s the opposite.

The athlete holds the paddle in his hands as follows.

With the hand closest to the board along which the stroke occurs, the athlete takes the lower 3 part of the spindle, and with the hand farthest from the side - the handle 4.

In this case, the upper 2 part of the spindle is inclined towards the side of the canoe 6.

Next, the athlete makes strokes according to a known pattern.

Since the center of application of the stop P ₁ created by the blade 1 is offset relative to the lower part of the spindle 3, the spindle will be affected by the torque P ₁ b ₁ , which will scroll the spindle in the hands of the rower.

To compensate for the arising torque, the spindle is bent by deflecting its upper part 2 relative to the longitudinal axis of the lower 3 part towards the canoe body 6 so that the condition of equal moments is fulfilled (see Fig. 1):

where does the spindle bend

.In the classic version with a symmetrical arrangement of the spindle relative to the blade, the handle 4 is located at a distance a ₁ from the diametrical plane of the canoe body 6, in the proposed embodiment, at a distance a ₂ . With the proposed design of the paddle, the distance from the upper end of the handle 4 to the diametrical plane during the stroke decreased by

.

On the other hand

.

.

, что соответственно уменьшит вынужденный наклон тела гребца или совсем его исключит.Thus, the hand of the rower controlling the handle 4, will shift to the diametrical plane during the stroke by the same amount

, which accordingly reduces the forced tilt of the body of the rower or completely eliminates it.

A more comfortable position of the rower's body will contribute to a better use of his physical abilities.

Claims (1)

A paddle for canoeing, containing a blade and a spindle with a handle in the upper part, the spindle being made with a bend, characterized in that the lower part of the spindle is horizontally offset relative to the geometric center of the blade area, and the bend of the spindle is made by sloping its upper part to the side displacement of the lower part, in addition, the upper part of the spindle and the blade are located in one vertical plane.

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