FR2894441A3 - Shoe e.g. basketball boot, for e.g. runner, has sole made of carbon and comprising projection on its inner surface on entire width of sole at height of chopart`s articulation, and dampening blocks disposed between sole and heel of shoe - Google Patents

Abstract

The shoe has a sole (1) made of carbon, and dampening blocks (3) disposed between the sole and a heel of the shoe, where the blocks avoid tilting of the sole towards the rear in static position. The sole has a projection (2) on its inner surface on entire width of the sole at the height of a chopart`s articulation, and an angle less projection embedded in a groove (4) arranged in the shoe and maintaining the sole in its position. The sole permits to balance a section so as to play its propellant role during heel/ground support.

Description

TECHNICAL FIELD INDICATION In the case of a

  new design of sneakers for sneakers, my invention takes into account the vertical, oblique and linear forces displaced by the person using these shoes in running and athletics in general. The material used to manufacture these soles must optimize these forces, and avoid the dissipation of energy stored in the race. Carbon seems to be the most appropriate material. The carbon insoles will slip into sports shoes as orthopedic insoles without fundamentally changing the manufacturing and material characteristics of the shoe. The technical field of direct application is the sports shoe industry. The manufacture of tires could also find applications, but I could not further research. It is therefore soles contributing to reduce the energy expenditure of the athlete, and more specifically the runner, and can improve the physical performance of the athlete during a sustained effort. The manufacture of sports shoes with carbon soles should not pose big problems, because apart from the heel to modify, the rest of the shoe should not be affected. Indeed, the soles remain free in the shoe, are not secured to him, which would inevitably cause tears in the shoe from the first steps. They are only placed on damping elements (foam) made at the height of the heel of the shoe. STATE OF THE ART In the various brands of sports shoes, the soles are made of a material whose bidensity only affects the position of the heel and its protection, either by beveling the heel, or by a outer corner softer than the inner corner, the front of these soles being made of the same material. DISCLOSURE OF THE INVENTION Pages 2 to 4: Biomechanical calculations showing the forces exerted during the run of an athlete. Page 5: Calculated data for soles using carbon material.

  Biomechanical calculations of the forces exerted by a runner in phase x of his stroke (Fig. 1)

  Either a 65 kg runner for 1.70 m moving at the speed of 5 m / s, or 18 km / h The angles: 9t = 115 Oh = 59 0g = 85 Op = 160 BEFORE THE SOLE This is the propulsion phase. This means that the F is 5 times the mass of the runner, on 1 foot, ie: 65 kg x 5 xg = 3185 N So, the force of call before flight is 5 m / s, making an angle heel / sol. The horizontal velocity is 5 m / sx cos20 (0.9397) = 4.7 m / s The vertical velocity is: 5 m / sx sin20 (o, 3420) = 1.70 m / s 20 Apogee (Y) : Y = (1.70 m2 / s - 0) / (2x 9.8) = 0.15 m The center of mass being located at 55% of the total size, the flight height is: 93, 5 cm + 0.15 m = 1.08 m IF x, y = sin 20 = 1089.3 Nm 25 cos = 2992.10 Nm Tan = 90 = 20 = 70 = 637. 2.7475 = 1750 Nm IF = 1089.3 + 2992.10 + 1750 = 5831.4 Nm FORCE DISTRIBUTION AT THE CARRIER FOOT 30 This force is distributed at the level of the dynamic triangle, ie 2/3 for the tarso-metatarsal articulation of the hallux: P1 = 3887 , 6N and P2 / P3 = 1295.8N AV heel The area of the AV heel being approximately 42 cm2 For P1: P 3887.6N / 0, 42 = 9256 Pa P2 / P3: 1295.8N / 0.42 = 3085 , 20 Pa or 1542.60 Pa for P2 and P3.

  Heel AR The position of the foot is in plantar flexion and makes a 0 160 angle with the horizontal. OP: 180 160 to 90 = 70, so in the negative position.

  Thus the tibiotarsal joint will undergo a force of: 1801.70 N / 0.34 = 5299 N / m2 1801.70 being the resultant of the 1911 N2 - 637 N2 vectors If we consider our runner at 5 m / s ( 18 km / h), the speeds of the segments are going to be, with a time interval of 0.01s: a = (coi-coi) / At, i being 2 moments of At. Foot / leg: coi = 160 ù85 / At0 , 01 = 7.5 / s thigh / trunk: co = 115 to 59 / At 0.01 = 5.6 / s

  Rolling of the leg on the tarsal pulley During the propulsion phase, the tibia and the whole body will roll on the tibio-tarsal joint, which gives a foot roll on the ground during the support phase. 1/4 of a second. The higher the speed, the shorter the time. Propulsion lasts only 100 to 120 milliseconds. Therefore the F required to lift the body above the talar-20 pulley being: 65 kg x 5 xg = 3185 N (AV foot) = (20 x 3185 N) / 4 = 15925 N With an angle of 30 due to flexion of the tibia, the mechanical advantage (AM) will be: AM = 4/16 = 0.25 = 1/4

  Stroke and Stroke Frequency Parameters 25 The smallest acceleration: a = F / m = 1801.70 / 65 Kg = 27.8 -2 / 0.278 m / s Calculate the leg / leg segment velocities by thigh diameters / leg: thigh 0 = 0,50 / 3,14 = 0,159 m leg 0 = 0,35 / 3,14 = 0,111 m 30 Speeds: 5 m / s / 0,159 m = 3,14 Rad / s (19,70 revolutions ) 5 m / s / 0.111 m = 9.00 Rad / s (56.5 revolutions) Speed difference 3/5 Frequencies are w / 2ic f thigh = 5.00 Hz and f leg: 1.40 Hz In degrees these speeds give: thigh = 1799.20 s and leg = 503.80 s 35 At each stride, the foot is in contact with the ground, from the heel to the forefoot. This is a process that repeats 450 times per kilometer, and lasts only 220 milliseconds on average. Angle between the foot AV and the ground in the propulsion phase (Fig. 2) 180-160 = 20 sin sin 20 (0.3420) = 653.60 Nm 1911 N. sin 20 = 653.60 Nm / 66.70 Kg We find the mass of the rider who will rotate on the horse. The force of 637 N will be in negative: ù 637N. cos 20 (0.9397) = 598.60 Nm. IF acting during the passage of the body on the ankle: (653.60 Nm) + (ù 598.60 Nm) = 55 Nm / s The P for the lower limb carrier is: P / s = 1241.20 N: 0.42 = 2981, 4 Kg N / m2 = 2.3 KgPa ROTATING FORCE FR = 39.20 N cos 30 = 39.20 N (0.8660) = 33.94 Nm

  COOPTION FORCE Fc = 39.20 N sin 30 = 39.20N. 0.5000 = 19.60 But when passing the body the forces are: FR = 65 kg. 5. g = 3185 N = 3185 N. (cos 30) = 2758.20 Nm FC = 65 kg. 5. g = 3185 N = 3185 N. (sin 30) = 1592, 50 Nm These two forces show that it is not only the leg that is put to contribution, but the mass of the whole body on the carrying member. The triceps sural will provide a force of: 637 N x sin 30 = 318, 5 N FRICTION COEFFICIENT If the runner is 5m / s, the force of f = 65 kg x 9,8 = 637 N + 1/2 m ( 32.5 kg) = 669.5 NK = 65 / 669.5 = 0.01 For the AR of the sole: N = W. sin 20 = 1911 N. 0.3420 = 653, 60 N = Tan 00 f = N = 0.01 x 653.60 N = 6.50 coefficient of friction = 0.01 IF = 1307.20 N For the VA of the sole: N = W. sin 75 = 3185. 0.9659 = 3076.4 N = W cos 15 = 3185. 0.2588 = 824.3 Nf = pN = 0.01 x 3900.7 N = 39.007 Data calculated for soles using the carbon material. For our runner, the top of the CM is at: 0.935 m + the height of the apogee which is at 0.15 m = 1.08 m of the total size. The speed being 5 m / s, and the contact of the heel with the ground about 3 times for 5 m / s, the velocity of the heel / ground touch is: V = VO + Gt = 0 + 9,8m / s2 x0 + 9.8m / s2x0.45 = 4,40m / s The height S is: VOt + 1/2 gt2 = ot + 1/2 (9.8 m / s2) (0.45) = 0.66 m So the heel thrust on the material will be: 1911 N. 0.66 m = 1261.30 Pa Deformation of the AR of the sole Sole stiffness: (R = Af / AL) (R = 1911N / m2 / 0.25 m) = 7644 N / m2 or 7.644 K / Pa This equation indicates the stiffness of the material. The compliance is (C = AUAF) = extensibility (C = 0.25 / 1911) = 0.00013 N / m2 = 0.13 Pa Deformation = = L - Lo r Lo Lo being the reference length. Let the beginning of the curve of the heel at the top of the heel of the sole 20 E = 0.25 m ù 0.105 m / 0.25 m = 0.58

  Resistance of the material (R = AF / AL) R being stiffness of the material. R = 5.3 / 0.25 = 21.2 Deformation {= L - Lo Lo The compliance of the material is 0.25 to 0.05 / 0.05 = 4 The heel is about 5 cm in length. Since Lo is the reference length, the stress / strain ratio constitutes the Young's modulus (E) of the structure. Carbon sole (Fig. 3) 30 When heel / ground support, the foot makes an angle of: 200 to 90 to 90 = 20 The weight of the body and the perpendicular force make an angle of 20 10 25 5 PRESENTATION FIGURES Figure 1 - Refers to page 2 of the geometric form of a rider in the x phase of the race. It is a 65 kg runner measuring 1.70m, moving at a speed of 5m / s, or 18km / h. The angles given to the segments of the lower limb will develop forces and M of F.

  See: for the AV of the sole: distribution of forces at the foot of the leg bearing on the tarsal pulley parameters of the speeds and frequencies of the stride.

  Figure 2 - refers to page 4 of the presentation Angle between AV foot and the ground in propulsion phase. The pressure on the lower limb is P / s = 2955,50 Pa What will give a coefficient of friction of = 0.01

  Figure 3 - Refers to page 5 of the presentation Position of the carbon sole in a sports shoe with the elements intended to receive it. This figure shows in section the damping pads, the groove in the shoe, the carbon sole beam profile, and the protrusion that is placed in the groove.

  DESCRIPTION OF AN EMBODIMENT The method of manufacture concerns: 1: the carbon sole of which I conceived the model. 2: the original shoe

  1: the carbon sole of which I designed the model: FIG 3/3 The carbon soles are not flat, but curved in double pendulum (1), with an angle of 30 to the AV and 20 to I AR, this in relation to the biomechanical calculations of the acting forces. The carbon soles have on their underside (below) a protrusion (2) molded over the entire width of the soles, at the height of the Choppart articulation, a projection without angle which will fit into a groove (4). formed in the shoe: this device maintains the sole in its position, and allows the beam profile to play its role propeller when heel / ground support. The soles of carbon are placed in the shoes as orthopedic insoles, without being secured to the shoe. 2: the original shoe The shoes retain their original characteristics, with the exception of the following two elements: ù Between the carbon sole and the rear leg and the heel of the shoe are damping studs (3) or density foam to defineù that avoid tilting the soles back in static position. ù The groove (4) formed in the shoe for receiving the projection (2) of the sole described above.

  INDICATING HOW THE INVENTION CAN BE APPLIED TO INDUSTRY

  -f Having observed that the soles of the shoes were made of a material that provide foot protection and cushioning of shocks due to walking or running, I implemented a concept of manufacturing insoles energy return . The purpose of these insoles is to optimize the biomechanical forces displaced in the race, to avoid the dissipation of the energy stored, and thus to increase the performance of the athlete.

  The soles will be carbon, they will be in the shoes as orthopedic insoles, without being attached to the shoe. The sports shoe retains its characteristics, except for two elements: between the / o carbon sole and the rear foot and the heel of the shoe are arranged damping pads (springs or density foam to be defined) which avoid the rocker- from the soles to the rear in a static position. A groove in the shoe for receiving the protrusion of the carbon sole described below. / S The carbon sole has on its underside (below) a protrusion molded over its entire width, at the height of the joint of Choppart, projection without angle which will fit into the groove in the shoe: this device maintains the sole in its position, and allows the beam profile to play its role propeller when heel / ground support. Zo Currently, a large number of people practice athletics, cross-country running, etc., and they represent an important public to which the major manufacturers of sports shoes can not fail to be interested. On the other hand, in the less numerous but international category of track and field champions (speed, hurdles, distance races ...), the gain of some 25 'hundredths of a second can attract the attention of coaches, sports clubs, and lead to the manufacture of custom series.

Claims (1)

CLAIMS I) Footwear, in particular a basketball-type sports shoe, comprising a soleplate for optimizing the forces and preventing the dissipation of stored energy, characterized in that the soleplate (1) is made of carbon and that between the carbon sole on the back of the foot and the heel of the shoe are arranged damping pads (3) which prevent the soles from tilting backwards in a static position, and in that the carbon sole is not flat, but curved double-balanced, with an angle of 30 at the front and 20 at the rear, and in that the carbon soles have on their inner side a projection (2) over the entire width of the soles, at the height the choppart articulation, a projection without angle that will fit into a groove (4) in the shoe, maintaining the sole in its position, and allowing the beam profile to play its propelling role during heel / ground support II) Chaussur e according to claim 1 characterized in that the damping pads (3) are constituted by springs or foam. 1 5