Patent Description:
Known from <CIT> is a leg training device used to increase running speed, consisting mainly of a crane frame, a lower frame welded to an L-shaped body, a belt pulley system, a weight applying system, a steel wire rope, an ankle strap, a leg and foot strap, a meter, etc. The steel wire rope passes through the belt pulley and weight systems, and both ends of the steel wire rope are connected to the ankle strap or leg and foot strap to provide the necessary pull resistance during training. Athletes use two hands to hold the armrests, and the ankle strap or the leg and foot strap is tied, so that athletes can continue their leg swing or leg press training. The training device implements a specific feature, a specific amount and positioning of athletes' training and can increase the running speed.

Document <CIT> discloses a leg training device used to increase running speed and consisting generally of a portal frame, a lower frame welded to an L-shaped body, a belt pulley system, a weight applying system, a steel wire rope, an ankle strap, a leg strap, a meter etc. The steel wire rope passes through the belt pulley and weight applying systems, and both ends of the steel wire rope are connected to the ankle strap or the leg and feet strap to provide the necessary pull resistance during training. Athletes use their hands to hold the handles, the ankle strap or the foot strap is tied and subsequently, users can begin their leg training.

<CIT> discloses an invention relating to a device and process for rehabilitating a knee of a person before and after operations or injuries that affect knee mobility, such as partial or full knee replacement or hip replacement. The knee rehabilitation device allows a patient to perform bending exercises with active support, passive or progressive resistance, and to perform knee extensions and straightening exercises. A device with foot-mounted elements is placed in rails on the base and is intended for reciprocal movement and passive bending of the knee along the axis of the base. Resistance is provided by resistance lines connected at both ends of the base and attached to a cradle. The cradle can be arranged in any position to perform knee extension exercises. The foot of a patient is fixed to the cradle using straps and the leg strap holds the upper thigh of the patient in proper alignment relative to the device.

Document <CIT> discloses an exercise device comprising a support base, at least one support frame member disposed on the support base, the support base having a standing rod in generally perpendicular orientation to the support base. The device also includes at least one pedal link, each having proximate and distal ends, each distal end having a pedal, and each proximate end being disposed on a support joint, the support joint being disposed on the support base, the distal ends having an upper and lower position, and means for independently applying a force to each pedal link to move the pedal link from the lower position to the upper position. The joint will also preferably allow movement from side to side.

Some commercially available technical solutions provide re-education of the hip joint flexion and extension (in the form of exoskeletons, machines for channelling the movement direction and tables with a sliding motion installation) as well as fitness-style leg training devices, the design of which is based on bindings with low weights mounted to them, e.g. in the form of dumbbells or weight applying profiles.

The disclosed prior art does not solve the problem of convenient and stable fixing of weights to the foot of a user that provides high comfort of use and secure hold of the weight attached to the foot of the user while simultaneously providing the ability to regulate the weight quickly and providing the required limb movement. These problems have not been effectively solved in the prior art mentioned above.

The object of the present invention is to provide a novel and improved device for training and rehabilitation that provides easy, quick and, most importantly, precise assembly of the weight and its application to the foot of the user.

The installation described herein aims to facilitate training using a novel approach to the issue of muscle balance in lower limbs and pelvic girdle. This balance corresponds to the stabilization of posture (including elements relating to the control of pelvic tilt and pelvic torsion and, secondarily, to the depth of spine curvatures and relating to motor abilities, such as balance).

The subject of the present invention is a leg training device according to claim <NUM>. Additional features and embodiments of the invention are defined in the dependent claims.

Preferably, the support frame is connected to foot fixings using connectors, wherein the connector is an elongated profile with the foot fixing pinned on the first side and shaped bushings on the second side, which are hingedly secured using rod bushings to the support frame with a weight spindle thereon.

Also preferably, the support frame includes connectors in the shape of gradually bent profiles with foot fixings, wherein the connectors are connected to the resistance mechanism using a ratchet system and secured to the support frame by a shaft shared with the resistance mechanism.

Also preferably, the resistance mechanism is a magnetic system that has a wheel with a magnetic module that fixes the magnet assembly with a variable distance from the wheel that is adjustable using a pulley block system and a tie-rod system suspended in the support frame.

Preferably, the resistance mechanism is supported by a magnetic module embedded in a shaft and placed in the support frame.

Preferably, the resistance mechanism is an electromagnetic system that has a wheel with a magnetic module that fixes the electromagnetic assembly, wherein the force of the electromagnetic field is regulated using electromagnets suspended in the support frame.

It is also preferred that the support frame comprises a base and a column, wherein the base has side beams, a front beam, a middle beam, and a landing mounted on the base, a profile arrangement with crossbars and guide rollers with a pulley block system with a tie-rod guided on the pulley block system, wherein the tie-rod is affixed on its both ends to the bottom side of foot fixings.

It is preferred that the tie-rod is coupled with the weight of the resistance mechanism installed in the column by the pulley block system and by passing through the pulley block system of the ballasting system.

Preferably, the weight of the resistance mechanism has a regulating system and guiding profiles.

Also preferably, a lever with a side profile of the ballasting system coupled to a limiting module that limits the range of movement of the lever is provided at the base.

Preferably, the resistance mechanism is a mechanism having pistons with piston rods.

Preferably, the frame is connected to foot fixings using connectors, wherein the connector is a longitudinal profile with a foot fixing attached on the proximal side, and with shaped bushings on the distal side, the bushings being hingedly secured to the frame via frame bushings, wherein a distal end of the piston with a piston rod is hingedly fixed to the upper part of the frame, and the proximal end of the piston with a piston rod is hingedly fixed to the connectors in a proximal part thereof, adjacent to the foot fixings.

Preferably, the resistance mechanism is a mechanism that comprises springs.

Preferably, the resistance mechanism is arranged in a frame in the form of a housing with a lid and perforated sheet metals and fixing profiles placed inside, wherein the resistance mechanism comprises springs in the form of spiral springs that are coaxially embedded together with drums, wherein connectors in the form of tie-rods are affixed to the drums and free ends of the tie-rod connectors are affixed to feet fixings.

Preferably, the resistance mechanism comprising springs has a resistance control system.

Preferably, the resistance control system comprises a motor with an adjusting knob.

Advantageously, the resistance mechanism comprises springs with dividers, with springs located on axes with drive sprockets, with adjusting sprockets, with sprockets, with adjusting springs and with cogged guides, wherein these elements cooperate with the drive shaft sprockets coming out of the motor equipped with the adjusting knob and constitute the resistance adjustment system.

It is also preferred that the foot fixings on the top side of the platform have a semi-circular wall, an anti-slip overlay, and binding holes are formed in the wall.

Also preferably, the stationary elements of the frame are connected by welding, and the movable elements are connected by screw coupling, and the shafts are mounted on a bearing.

It is also preferred that the frame elements have protective and anti-slip rubber coating.

Preferably, the ratchet system is used to transfer the resistance; and the ratchet system is located on the axis.

Also preferably, the solution is an installation that is part of a novel approach to the issue of muscle balance in lower limbs and pelvic girdle. This balance corresponds to the stabilization of posture (including elements relating to the control of pelvic tilt and pelvic torsion and, secondarily, to the depth of spine curvatures and relating to motor abilities, such as balance). Thus, it allows to create a training situation in which the muscles group of hip flexors (mainly muscles: iliopsoas, tensor fasciae latae, gluteus minimus, gluteus medius) are subjected to a high-intensity strength training with simultaneous training of the muscles of hip and knee extensors (mainly muscles: gluteus maximus, piriformis, gemelli, internal obturator, quadratus femoris, vastus) as stabilizing muscles. The key issues are the position of the body and its support during training, as well as the intensity of training stimulation allowing to build a complex movement pattern responsible for reducing morphofunctional disproportions within the muscle groups that are crucial for stabilisation.

Preferably, in the leg training device, the weight application is designed so that the centre of gravity of the load, i.e. the resistance mechanism, i.e. the point of force application is at the axis of the tibia.

The advantage of the invention is that it enables quick and safe mounting of the weight to a foot as well as comfortable usage by using cushions as well as profiles and non-slip inserts. One advantage is also the ability to adjust the weight quickly and smoothly using the frame structure, which enables the execution of exercise and rehabilitation.

The leg training device according to the invention is shown in the figures of the drawing, in which <FIG> show a perspective view of the device in an embodiment with free weights, <FIG> and <FIG> is a perspective view of the device in an embodiment with a magnetic wheel. <FIG>, <FIG> show a perspective view of the device in an embodiment with a stationary weight in the form of a weight column with a tie-rod system, <FIG> show a perspective view of the device in an embodiment with pistons and piston rods, <FIG> show a perspective view of the device in an embodiment with spring resistance, <FIG> shows a perspective view of the foot fixing.

The solution according to embodiments comprises two essential parts: the first part is a foot fixing system <NUM> connected by means of connectors <NUM> to the second part, which is a system of resistance mechanisms <NUM> that provides the application of force of appropriate magnitude, direction, and sense. Resistance mechanisms <NUM> provide a sufficiently large force in a near-vertical direction and with essentially downward sense are shown. The foot fixing system <NUM> has a rigid platform <NUM> that provides a three-point foot support, adjustable fasteners for adjusting the bindings 7a, 7b to the girth of feet, and upholstered yoke elements in the form of cushions <NUM>, <NUM>, a profile washer <NUM> arranged so that the cushion <NUM> located at the rear is above the heel, and the cushion <NUM> and the profile washer <NUM> located at the front are evenly located on the instep, near the ankle joint, wherein the profile washer <NUM> is a rigid element that transfers the load from the bindings 7a, 7b evenly onto the instep through the cushioning upholstery. An anti-slip overlay <NUM> is placed on the top side of platform <NUM> and a rear wall <NUM> is secured to the top side of platform <NUM>. The rear wall <NUM> has a substantially semi-circular U-shape that matches the envelope of the rear part of platform <NUM>. In the rear wall <NUM>, lower holes for bindings 7b are formed on the longitudinal lower protrusions, and upper holes for bindings 7a are formed above. The foot fixing <NUM> having the platform <NUM> with the rear wall <NUM> and the profile washer <NUM> is made of metal. In alternative embodiments, they are made of a strong material or a composite. The rear wall <NUM> and the profile washer <NUM> located in the upper part above the foot are upholstered and the foot is held by the cushion <NUM> located in the rear part of the foot fixing <NUM>, respectively, and the cushion <NUM> is present in the upper part. The outer shape of cushion <NUM> corresponds to the rear wall <NUM>, and the shape of the cushion <NUM> corresponds externally to the shape of the profile washer <NUM>. The inner sides of cushions <NUM>, <NUM> correspond to the foot shape. Bindings 7a, 7b with their fasteners are fixed to the rear wall <NUM>. In an alternative embodiment, bindings may be in the form of belts, tie-rods, or chains. Bindings 7a, 7b are attached to the upper and lower holes on the rear profile, respectively. In the upper part of the profile washer <NUM>, there are guides for bindings 7a, 7b. The profile washer <NUM> is movably connected to the bindings 7a, 7b. When fastening the bindings 7a, 7b, the foot fixing <NUM> is immobilized by a snug fit of cushions <NUM>, <NUM> to feet, as shown in <FIG>. In an alternative version, the foot fixing <NUM> has one binding 7b.

In the leg training device, the load application is designed so that the centre of gravity of the load, i.e. the resistance mechanism <NUM>, i.e. the point of application of force is at the axis of the tibia.

In a first embodiment of the leg training device, a system based on the free weights of the resistance mechanism <NUM> is shown, as shown in <FIG>. The system of the embodiment comprises a support frame <NUM>. The support frame <NUM> is connected to foot fixings <NUM> using connectors <NUM> that are hingedly secured using bushings <NUM>, <NUM>, <NUM> of the support frame <NUM>, said support frame <NUM> having a weight spindle <NUM> of the resistance mechanism <NUM> in the form of training plates. The support frame <NUM> has support profiles <NUM>, <NUM>. The support profiles <NUM>, <NUM> are connected at one end to a transversely aligned rotary axis <NUM> that is shared by the support frame <NUM> and connectors <NUM>. The rotary axis <NUM> comprises an inner profile of the bushing <NUM> with lateral outer profiles of the axis bushing <NUM> provided thereon that have a rubber cover of the bushing <NUM> with a shock-absorbing, anti-slip and spacing function. All profiles of the support frame <NUM> and connectors <NUM> having a distal end with transverse bushings <NUM>, <NUM>, <NUM> are combined with the rotary axis <NUM> using a bearing. Two inner beams in the form of profiles form connectors <NUM>. Their shape is in the proximal part, to which the foot fixings <NUM> are applied, adapted to the spacing of legs of an athlete, and then, by a sequence of two creases narrowing the spacing, it assumes a spacing that reduces the distance of the profiles of connectors <NUM> from the centre of gravity of the weight set of the resistance mechanism <NUM>. Foot fixings <NUM> are fixed directly to the proximal ends of support profiles of connectors <NUM>. In this bottom area, profiles of connectors <NUM> are provided with a cushioning rubber cover <NUM>. The support frame <NUM> includes outer profiles <NUM> that stabilise the support frame <NUM>. The support frame <NUM> further comprises two transverse beams, namely an upper beam <NUM> and a lower beam <NUM>, and two side beams <NUM> secured diagonally to the ends of outer profiles <NUM>, thereby forming their extension. The lower beam <NUM> is at the height of the profile <NUM> and the side beams <NUM> bond, and the upper beam <NUM> is at the ends of side beams <NUM>. A cushioning rubber cover <NUM> is provided on the bottom plane of the lower beam <NUM>. A weight spindle <NUM> is fixed to the upper beam <NUM>. In an alternative embodiment not illustrated in the drawing, the support frame <NUM> may also be horizontal and may comprise profiles forming connectors <NUM> with the beam <NUM> fixed to its top side with the weight spindle <NUM> set vertically upwards. In an alternative embodiment not illustrated in the figure but apparent to the person skilled in the art, the beam <NUM> may be in the form of a platform. This embodiment implements a solution in which the weight of the resistance mechanism <NUM> from the plates is transferred by the support frame <NUM> to connectors <NUM> with foot fixings <NUM>, the plates being the most popular form of free loads used in strength training. The installation adapted to the standardized weights is more versatile and reduces purchase costs. The support frame <NUM> with the weight spindle <NUM> for the plates is located between the feet of the athlete and the rotary axis <NUM>, which generates a downward force transferred to foot fixings <NUM> through the profiles of connectors <NUM>. The support frame <NUM> is inclined, and in an alternative embodiment not illustrated, it is horizontal, as is apparent to a person skilled in the art. The inclination of the support frame <NUM> allows the weight of the resistance mechanism <NUM> to be shifted as far as possible in the direction of the athlete in order to apply the weight of the resistance mechanism <NUM> more effectively by increasing the moment of force.

Another embodiment shows a variant of the device, as shown in <FIG> and <FIG>. The embodiment implements a magnetic system, wherein the system includes analogous connectors <NUM> in the shape of gradually bent profiles 22a, 22b with foot fixings <NUM> as described above, and the support frame <NUM> in the form of a cage with an adjustable resistance mechanism <NUM> based on magnetic or electromagnetic braking.

In the leg training device, the load application is designed so that the centre of gravity of the load, i.e. the resistance mechanism <NUM>, i.e. the point of force application is at the axis of the tibia.

The support frame <NUM> has a rectangularly shaped side frame <NUM> with a truncated top corner and a series of crossbars connecting them, such as the upper beam <NUM>, the front beam <NUM> and the rear beam <NUM>. The lower profiles <NUM> of the side frames <NUM> perform a supporting function and are provided with rubber covers 26a, 26b with cushioning and stabilizing function.

The resistance mechanism <NUM> shown in the example, as shown in <FIG>, comprises a wide wheel <NUM> and fixed magnet assembly <NUM> secured thereon using a magnetic module frame <NUM>, with its distance from the wheel <NUM> adjustable by a tie-rod system <NUM>, and a ratchet system <NUM> to move the wheel <NUM> by the movement of connectors <NUM>. The wheel <NUM> is formed to comprise a component of material comprising a steel alloy to interact with the magnet assembly <NUM>, wherein the wheel <NUM> in the embodiment is made entirely of steel. In alternative embodiments it can include a steel ring. The profiles' axis of rotation of connectors <NUM> and wheel <NUM> is a shaft <NUM> that connects rear vertical profiles of the support frame <NUM>. Each of the two profiles of connectors <NUM> connects with the shaft <NUM> using a bearing <NUM> recessed into the bushing <NUM> provided in the connector <NUM> at an end thereof located next to the wheel <NUM>. The ends of connectors <NUM> to which the foot fixings <NUM> are fixed have a cushioning rubber cover <NUM>. From the inner side of the support frame <NUM>, the outer side of the profile of the connector <NUM> is separated by a spacing divider <NUM>. Wheel <NUM> is secured on shaft <NUM> using bearing <NUM>. The arrangement of wheel <NUM> with the magnetic module frame <NUM> fixing the magnet assembly <NUM> with a variable distance from the wheel <NUM> is regulated using a pulley block system <NUM>, <NUM>, <NUM> and a tie-rod system <NUM> suspended in the support frame <NUM>. The magnetic system of the resistance mechanism <NUM> is supported on the bottom side by a magnetic module frame <NUM> having an arm 222a with an opening embedded on a shaft <NUM> located in the support frame <NUM> between the side frames <NUM>.

The wheel <NUM> is widened in the peripheral portion. On the inside of the extension, the wheel <NUM> is serrated in a way that corresponds to the ratchet system <NUM> located on the profiles of connectors <NUM>. The ratchet system <NUM> is provided so that resistance is only generated by lifting a leg positioned in a foot fixing <NUM> coupled with the connector <NUM>. The magnetic mechanism of the resistance mechanism100 includes a magnetic module frame <NUM> having a shape similar to that of the wheel <NUM>, provided with an arm 222a, and a pulley block fixing system of the tie-rod system <NUM>. The tie-rod system <NUM> includes a lower pulley block system <NUM>, a wire rope 227a, a pulley block <NUM> of the tie-rod system <NUM>, and an upper pulley block system <NUM>. A magnet assembly <NUM> fixed by side profiles <NUM> is provided inside the fixing magnetic module frame <NUM> that fixes the magnet assembly <NUM> of the resistance mechanism <NUM>. The arm 222a of the magnetic module frame <NUM> has at its end a bushing <NUM> with a bearing <NUM> allowing the magnetic module frame <NUM> to rotate relative to the axis defined by the shaft <NUM>. Shaft <NUM> is embedded on profiles of the support frame <NUM>. The profiles of connectors <NUM> having the shape of gradually bent profiles 22a, 22b with foot fixings <NUM> pass above the shaft <NUM> of the resistance mechanism <NUM>.

In the support frame <NUM>, the resistance mechanism <NUM> from the upper, top side of the magnetic module frame <NUM> is suspended using a lower pulley block system <NUM> of the tie-rod system <NUM> for adjusting the resistance, that is, the distance of the magnetic module frame <NUM> from the wheel <NUM>, and using an upper pulley block system <NUM> located on the shaft <NUM> of the tie-rod system <NUM>, wherein the shaft <NUM> is located between the diagonal profiles of side frames <NUM> of the support frame <NUM>, below the upper beam <NUM> of the support frame <NUM>. Below the shaft <NUM>, between the oblique beams of side frames <NUM>, there is a shaft <NUM> of the pulley block <NUM> of the tie-rod system <NUM>, on which there is a drum <NUM> provided on one side with a sprocket wheel 228a that corresponds to a smaller sprocket wheel 215a formed on the shaft <NUM> of an adjusting crank <NUM>. The shaft <NUM> is located below the shaft <NUM> of the pulley block <NUM> and, when recessed into the side frame <NUM>, has the adjusting crank <NUM> at the end of the right side of the side frame <NUM>. A wire rope 227a, which is a tie-rod in the tie-rod system <NUM>, is wound onto the pulley block <NUM> during adjustment by rotating the adjusting crank <NUM> and continues to pass through the two pulley block systems <NUM> and <NUM> several times.

An alternative embodiment that is not illustrated but apparent to a person skilled in the art includes the use of an electromagnetic system, in which the force of the magnetic field is variable and based on adjustable electromagnets. In alternative embodiments, the distance between the magnet assembly and the wheel <NUM> may also be electrically adjustable using a motor driving the wound tie-rod shaft or in an alternative embodiment using a chain.

The resistance mechanism <NUM> is an exemplary magnetic resistance system shown in a schematic manner. Its construction has been simplified but it will be understood by a person skilled in the art.

Another embodiment shows a variant of the device, as shown in <FIG>, <FIG>. The embodiment implements a system of previous embodiments comprising foot fixings <NUM>, connectors <NUM>, the support frame <NUM>, and the resistance mechanism <NUM>.

The resistance mechanism <NUM> is based on a commonly used stationary weight system in the form of the column <NUM> with weight stock and a tie-rod system that includes the tie-rod <NUM> and the pulley block system <NUM>, <NUM>, <NUM>. The tie-rod <NUM> is single and both ends are fixed at the right and left foot fixing <NUM>, respectively. As a result, the upward movement of one foot presses down the fixing <NUM> of the other foot of the user and prevents movement of the connector <NUM> connected to it during the exercise. The design of the column <NUM> is shown schematically in <FIG> as a simple example of this type of solution. In this variant of the embodiment, force is applied to foot fixings <NUM> using profiles <NUM> that fix the tie-rod <NUM> being one of the elements of connectors <NUM>. In the profiles <NUM>, there are spindles with spacers <NUM>, so that the position of the end loop of the tie-rod <NUM> is unchanged. The tie-rod <NUM> is a wire rope. Profiles <NUM> are shaped in such a way that they correspond to support profiles 311a, 311b in the form of obliquely arranged crossbars positioned on the support frame <NUM>.

The support frame <NUM> comprises a base <NUM>, wherein the base <NUM> comprises side beams <NUM>, a front beam <NUM>, a middle beam <NUM> and a landing <NUM> mounted on the base <NUM>. Both beams, front <NUM> and middle <NUM>, function as support and have a suitable rubber cover 36a, 36b. In front of support profiles 311a, 311b, on the side beams <NUM> of the base <NUM> of the support frame <NUM>, there is the landing <NUM> in the form of a rectangular platform. Below said support profiles 311a, 311b, there are two ledges forming crossbars <NUM> on which pairs of guide rollers <NUM>, holding the position of the tie-rod <NUM> within the limit of lateral deflections below the support profiles 311a, 311b, are arranged. From the guide rollers <NUM>, the wire rope of the tie-rod <NUM> passes through the pulley blocks <NUM> secured on the middle beam <NUM> and, by changing the direction, passes at the top through the pulley blocks <NUM> of the ballasting system <NUM> to the column <NUM> of the resistance mechanism <NUM>. The ballasting system <NUM> comprises a lever 319a with a limiting module <NUM>, crossbars <NUM>, attached to the lower part of the lever 319a, in the form of longitudinal L-shaped profiles, with a first side profile 317a at its end, located at the profile of the side beam <NUM> of the support frame <NUM>, and at the same time at the second side beam <NUM> profile, there is a second symmetrical side profile 317b and a system of shafts <NUM>, <NUM> connecting them, on which the profiles of the ballasting system <NUM> rotate relative to the support frame <NUM>. On the main shaft <NUM> of the ballasting system <NUM>, which is located between the distal ends of the side profiles 317a, 317b of the ballasting system <NUM>, there are pulley blocks <NUM> on which the tie-rod <NUM> rotates. The other two rollers are side shafts <NUM>, which bearingly connect the proximal ends of side profiles 317a, 317b of the ballasting system <NUM> with side beams <NUM> of the base <NUM> of the support frame <NUM> to form a transverse axis of rotation. The ballasting system also has a limiting module <NUM> that limits the movement range of the lever 319a located on the right side beam <NUM> of the support frame <NUM>. The C-shaped limiting module <NUM> provides only two stable positions for the lever 319a. The distal position of the lever 319a is when the lever 319a is directed towards the column <NUM> of the resistance mechanism <NUM>, thereby causing strain relief of the tie-rod <NUM>. The proximal position is when the lever 319a is directed to the user performing an exercise, causing tension on the tie-rod <NUM> and weighing down the resistance mechanism <NUM>. The weight column <NUM> is connected to the support frame <NUM> using a transverse lower beam <NUM> of the column <NUM>, wherein, due to its supporting nature, it has lateral rubber covers 36c. The frame-shaped column <NUM> also has two side beams <NUM> of profiles, an upper beam <NUM>, an upper crossbar <NUM>, and a lower crossbar <NUM>, which includes a cushioning 325a for the weight stack <NUM>. A weight stack <NUM> of the resistance mechanism <NUM> is located on the lower crossbar <NUM>. Between the upper crossbar <NUM> and the lower crossbar <NUM>, there are two guiding profiles <NUM> of the resistance mechanism <NUM>, in the present embodiment in the form of tubes, however, in the alternative embodiment there may be a different cross-sectional shape of the guiding profiles <NUM>, which will be understood by the person skilled in the art, as well as the use of different shapes of the profiles specified in the device. The tie-rod <NUM> runs inside guiding profiles <NUM>. In the weight stack <NUM> of the resistance mechanism <NUM>, there is provided a perforated ledge 327a and a spindle 327b with a knob comprising together a load regulation system <NUM> of the weight stack <NUM> of the resistance mechanism <NUM>.

The tie-rod <NUM> attached to the foot fixing <NUM> passes through the pulley block system <NUM> and successively through the pulley block system <NUM> of the ballasting system <NUM>, then enters the column <NUM> through the bottom pulley block system <NUM>, passes vertically through the guiding profile <NUM> of the weight stack <NUM>, passes through the top pulley block system <NUM> located on the bottom side of the transverse upper beam <NUM> and returns on the central pulley block <NUM> fixed to the perforated ledge 327a that binds the weight stack <NUM>, then the tie-rod <NUM> returns sequentially through the top pulley block system <NUM> to the bottom pulley block system <NUM>, sequentially onto the pulley block system <NUM> of the ballasting system <NUM>, through the pulley block system <NUM>, connecting at its end with the second foot fixing <NUM> on the opposite side.

The ballasting lever 319a of the ballasting system <NUM> is used to reduce the backlash in the initial phase of the foot lift movement. The tie-rod <NUM> is connected by its ends to foot fixings <NUM> by means of spindles placed in profiles <NUM> of a shape corresponding to two inclined support profiles 311a, 311b in the form of diagonally arranged crossbars placed on the support frame <NUM>, which are a direct support base for foot fixings <NUM>. It is essential that the tie-rod <NUM> is directionally stabilized by pulley block systems <NUM>, <NUM>, <NUM>, <NUM>, <NUM> at the stage of entry between support profiles 311a, 311b as well as at all locations of direction change. For a person skilled in the art, it will be possible to use foot fixings <NUM> with a base for profiles <NUM>, which in alternative embodiments will be conical, round, domed, or flat, and it is important that the return path of the foot fixing <NUM> to the base is as unequivocal as possible in the final section and prevents twisting or shifting of the foot fixing <NUM> relative to the socket formed for the ends of connectors <NUM> by mutually arranging support profiles 311a, 311b.

In a further embodiment of the leg training device, a system based on a piston resistance mechanism <NUM> is shown, as shown in <FIG>. This example includes foot fixings <NUM>, connectors <NUM>, support frame <NUM>, and resistance mechanism <NUM>.

The arrangement comprises a support frame <NUM>. The support frame <NUM> is connected to foot fixings <NUM> via connectors <NUM> that are hingedly secured using bushings <NUM> of the support frame <NUM>, wherein the support frame <NUM> is provided with a resistance mechanism <NUM> comprising pistons <NUM> with piston rods <NUM>. The support frame <NUM> includes lower beams <NUM> and side beams <NUM> connected by transversely arranged upper crossbar <NUM> and lower crossbar <NUM>. The profiles of lower beams <NUM> of the support frame <NUM> and connectors <NUM>, having transverse bushing sleeves <NUM> at their distal end, are bearingly connected to a common rotary axis. Foot fixings <NUM> are fixed directly to the proximal ends of support profiles of connectors <NUM>. In this bottom area, profiles of connectors <NUM> are provided with a cushioning rubber cover <NUM>. The lower crossbar <NUM> of the support frame <NUM> is attached on the bottom side to lower beams <NUM> at a proximal portion thereof, where the lower beams <NUM> connect with the side beams <NUM>. The upper crossbar <NUM> is located at the top of side beams <NUM>. The upper hinge fixings <NUM> of the piston resistance mechanism <NUM> are fixed to the upper crossbar <NUM>. The pistons <NUM> constituting the piston resistance mechanism <NUM> are fixed with their distal end to the upper crossbar <NUM> of the support frame <NUM> and with the proximal end of piston rods <NUM> of the resistance mechanism <NUM> to the connectors <NUM>, on which, at a proximal portion near the foot fixings <NUM>, there are suitable hinged fixings <NUM>.

This embodiment implements a solution in which the resistance from the resistance mechanism <NUM> is transferred from pistons <NUM> mounted on the support frame <NUM> and piston rods <NUM> using connectors <NUM> with foot fixings <NUM>. The axis of rotation of the bushing <NUM> is spaced from the foot fixings <NUM>, and the piston resistance mechanism <NUM> is located between the bushing <NUM> axis and foot fixings <NUM>, thereby generating a downward force transferred to foot fixings <NUM> via profiles of connectors <NUM>.

Another embodiment shows a variant of the device, as shown in <FIG>, comprising foot fixings <NUM>, connectors <NUM>, the support frame <NUM>, and the resistance mechanism <NUM>.

The leg training device is designed to apply a load so that the centre of gravity of the load, i.e. the resistance mechanism <NUM>, i.e. the point of force application is at the axis of the tibia.

The resistance mechanism <NUM> is based on a spring-loaded mechanism comprising a series of spiral springs <NUM> arranged coaxially with the drums <NUM>, with each drum <NUM> having a connectors <NUM> in a form of tie-rod that connects the spring-loaded resistance mechanism <NUM> to foot fixings <NUM>. The tie rods of connectors <NUM> are wire ropes wound onto drums <NUM>. The structure of the resistance mechanism <NUM> comprising springs <NUM> is shown in <FIG> as an example of this type of solution. The resistance mechanism <NUM> including springs <NUM> has a resistance control system driven by the motor <NUM>. Springs <NUM> are attached externally to the housing <NUM> and internally to sprockets <NUM> and are separated by spacers <NUM> placed on rings. The housings <NUM> of springs <NUM> are attached by means of fixing profiles <NUM> to the support frame <NUM> in the form of a sheet metal housing <NUM> and perforated sheet metals <NUM> fixed to the support frame <NUM>. Inside the sheet metal housing <NUM> constituting the support frame <NUM>, perforated sheet metals <NUM> are provided at the proximal and distal walls and perforated sheet metals <NUM> at the side walls. The force from the springs <NUM> is transferred to the connector <NUM> in the form of a tie-rod by means of a drive sprocket <NUM> conforming to the sprocket 511a formed in the drum <NUM> and the sprockets <NUM> of the springs <NUM>. The adjusting sprocket <NUM> is conforming to sprockets <NUM> of springs <NUM> and stabilizing sprockets 202a disposed in the perforated sheet metal <NUM> behind the resistance mechanism <NUM> having the springs <NUM>, and is disposed on a common axis <NUM> with the drive sprocket <NUM>. The position of the drive sprocket <NUM> and the adjusting sprocket <NUM> is adjusted by the cogged guide <NUM> on the proximal side and the adjusting spring <NUM> on the distal side. The cogged guide <NUM> conforms to sprockets 522a provided on the drive shaft <NUM> connected to the motor <NUM>. All axes have mounted bearings <NUM>.

Spacers <NUM> are provided on rings, the rings being an integral part of spacers <NUM> and having a diameter that allows them to slide freely over the adjusting sprocket <NUM> and the drive sprocket <NUM>. The adjusting sprocket <NUM> and the drive sprocket <NUM> have a similar cross-section and are aligned with sprockets <NUM> of the springs <NUM> in such a way that if the drive sprocket <NUM> is located inside the sprocket <NUM> of the spring <NUM>, it transfers the torque generated during the deflection of the spring <NUM> by the rotational movement of the drive sprocket <NUM> located on the axis. If the adjusting sprocket <NUM> is located in the sprocket <NUM> of the spring <NUM>, it prevents the spring <NUM> from unfolding while maintaining its base resistance via the sprocket 202a in the perforated sheet metal <NUM> located behind the housing <NUM> of springs <NUM>. The rings in spacers <NUM> are spacers allowing for a given margin of error, a room for manoeuvre in the adjustment system, because they do not have a sprocket-like cross-section and are a point where the stationary (rotationally relative to the axis) adjusting sprocket <NUM> and the rotationally movable drive sprocket <NUM> meet. The cogged guide <NUM> is moved along the axis using transverse strips, and therefore the position of the point of contact between the drive sprocket <NUM> and the adjusting sprocket <NUM> is changed. This point can take the following positions: between the drum <NUM> and the first spring <NUM>, under the spacer ring <NUM> between the first and second springs <NUM>, under the spacer ring <NUM> between the second and third springs <NUM>, under the spacer ring <NUM> between the third and fourth springs <NUM>, or between the fourth spring <NUM> and the sprocket 202a located in the perforated sheet metal <NUM> behind the spring housing <NUM> of the springs <NUM>. The cogged guide <NUM> is displaced using a drive shaft <NUM> driven by the motor <NUM>.

The support frame <NUM> in the form of a sheet metal housing <NUM> comprises a lid <NUM> perforated at the points where tie-rods of connectors <NUM> pass, as well as the top rubber cover 204a, 204b at the points of contact with the foot fixings <NUM>. In the further portion of the support frame <NUM> in the form of a sheet metal housing <NUM>, there is the adjusting knob <NUM> connected to the motor <NUM> using an electric cable <NUM>.

Claim 1:
A leg training device comprising a support frame (<NUM>) with a resistance mechanism (<NUM>) and connectors (<NUM>) connected to foot fixings (<NUM>) and affixed to the resistance mechanism (<NUM>), wherein
each foot fixing (<NUM>) has a rear cushion (<NUM>) located at the rear above the heel, and an instep cushion (<NUM>) covered by a profile washer (<NUM>) evenly located at the front on the instep near the ankle joint,
and wherein each foot fixing (<NUM>) comprises bindings (7a, 7b) covering the profile washer (<NUM>) and mounted to the foot fixing (<NUM>) at the axis of the tibia,
wherein each foot fixing (<NUM>) is connected to the resistance mechanism (<NUM>) separately,
and simultaneously, each foot fixing (<NUM>) comprises a flat platform (<NUM>), wherein a rear wall (<NUM>) is secured to the top side of the platform (<NUM>) and the bottom of the platform (<NUM>) is fixed to connectors (<NUM>) guiding the platform (<NUM>), so that it is lifted up in a near-vertical direction with the load force of the resistance mechanism (<NUM>) applied with essentially downward sense.