SKI STICK Russian patent published in 2018 - IPC A63C11/22 

FIELD: sports.

SUBSTANCE: invention "Ski stick" refers to the sport of higher achievements, specifically – to ski races and biathlon. Object of the present invention is to determine the specific pressure of the spikes m_n, acting on the elastic element, at which its buoyancy force on the harmonic component w₀ acceleration of the hand will be maximum. Problem is solved by choosing the natural frequency of the spikes w_w in accordance with the equality: w₀=w_w, where w₀ – the harmonic component of the acceleration of the hands of the athlete; w_w – the natural vibration frequency of the studs, along which the length of the studs and the amount of compression of the elastic element equal to them are determined: λ=g/w_w², where λ – the length of the studs and the equal compression of the elastic element; g=9.8 m/s² – the acceleration of the free fall of the body, the length of which is found allows, by varying the diameter of the studs and using the rebound method, to find their specific pressure m_n, in which the specific buoyancy of the elastic element F_n on the harmonic component w₀ acceleration of the hand, calculated by the formula: F_n=m_n⋅a_n, where F_n – the n^th specific buoyancy force of the elastic element on the harmonic component w₀ acceleration of the hand at specific pressure m_n each of the N settable spikes; m_n – the n^th specific pressure of the stud on the elastic element on the harmonic component w₀ acceleration of the hand; a_n – n^th acceleration of the stud with specific pressure m_n on the harmonic component w₀ acceleration of the hand, will be maximum, on which, knowing the force M of the hand on the elastic element on the harmonic component of the acceleration of the hand w₀, calculate the necessary number of studs N with a flat base to observe the obtained parameter m_n N=M/m_n, where N is the number of studs with a flat base, through which the pressure of the hands is transferred to the rod of the ski pole; M is the force of the hand pressure on the harmonic component w₀.

EFFECT: claimed invention allows, in comparison with existing devices, to increase the repulsive force by the ski poles by increasing the pressure on the elastic element, which is carried out through spikes with flat bases.

1 cl