SU1493269A2 - Wrist-exercizing device - Google Patents

Abstract

The invention improves the efficiency of training the muscles of the fingers and forearm. For this, a reversible generator of electrostimulating signal 12 is inserted into the expander. The generator is mounted at the free end of the handle 3. The generator shaft 13 is rigidly connected to the gear 8 mounted on the glass 7. The glass is mounted on the handle so as to rotate from the rail 9. The rail is fixed to another handle hinged to the first. The power load is created using permanent magnets 5 and 6. Electrodes 15 and 16 are attached to the handles and connected in parallel to the generator. The handles themselves are made of dielectric material. 3 il.

Description

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The invention relates to sport as well. to the device for training the hands.

The aim of the invention is to increase the effectiveness of training the muscles of the fingers and forearm.

1 shows a carpal expander, plan view; in fig. 2 - section AA in FIG. figure 3 - view B in figure 2.

A wrist expander contains two articulated bars 1 and 2 with handles 3 and 4, a cyclic load setting node placed between them, including two permanent magnets 5 and 6 mounted on the tides of the free ends of bars 1 and 2 with the same poles in opposite directions one to another and located between permanent magnets 5 and 6 with the possibility of rotation from the drive a metal screen in the form of a cup 7 made of ferromagnetic material with a comb side wall mounted on the free end of the handle 3 coaxially with a magnet 5, and the drive, the screen is made in the form of a rack and pinion; gear 8 of which is fixed coaxially on the glass 7, and the gear rail 9. is installed at the free end of the handle 4, the stops 10 and 11 move the handle 3 H 4 to both sides, respectively at the free end of the rail 9 and on the handle 3. On the poles of permanent magnets 5 and 6 facing one another, cylindrical undercuts are made, coaxial to glass 7, with profiles in the form of convexity in magnet 5 and in the form of concavity in magnet 6. The ridges of the wall of glass 7 cover the area of magnet 5 not completely long match its size in width.

The expander is provided with a reversible generator of an electrical stimulating signal 12 mounted on the inflow of the bar 1. Its shaft 13, resting on the bearing 14, is rigidly connected with gear 8. On the side surfaces of the arms 4 and 3, made of a dielectric material, electrodes 15 and 16 are located, connected by means of conductors 17 and 18, for example, embedded in strips 1 and 2, in parallel with generator 12, having the possibility of adjusting the magnitude

1493269

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built-in signal

for example, potential

15

0

25

thirty

35

40

45

50

55

19 meter with 1lits controller and corresponding previously otted reference marks on the movable and fixed elements of the latter.

Hand expander works as follows.

The training unit is taken with the hand by the handles 3 and 4 with electrodes 15 and 16 and, having clasped them with fingers, periodically begins to move the strips 1 and 2. At the same time, with the muscles of the fingers of the hand, as well as the forearm, a certain force develops to overcome the repulsive force of to each other with the same poles of permanent magnets 5 and 6, the value of which depends on the properties of the magnets of the area of mutual overlap of their poles and the distance between them. By moving the toothed rack 9 relative to the gear 8 associated with it; rigidly mounted on the shaft 13 of the generator 12, multidirectional (reversible) rotation of the glass 7 and the cylindrical overlapping of the ridges of its wall of the active area of the magnet pole 5, transforming into a corresponding change in the magnetic interaction of both permanent magnets, is carried out. Since the crests of the wall of the cup 7 overlap the area, the magnet 5 is not completely, the change in the magnitude of the mutual repulsion force of the permanent magnets has a larger component depending on the distance between their poles, on which the variable component is imposed, the latter being determined by the cyclic overlap. As a result, the hands of the wrist undergo vibration-stimulating effects during training. In this case, the periodicity of the mutual movement of the laths 1 and 2 is 1.5 s in time. The reduction factor in the gearing of the rack 9 with the gear 8 and the number of ridges in the wall of the glass 7 are chosen such that the frequency of the cyclic mechanical load is obtained in the order of 15 17 Hz (the value required for optimal development

have trainee). I

At the same time, reverse rotation through rack and pinion

the expander of the shaft 13 of the generator 12 leads to the generation of the last electrical signal supplied in parallel by means of conductors 17 and 18 to electrodes 15 and 16 of the handle 3 and 4, captured by the hand of the trainee. The magnitude of the electrical signal taken from the output of the generator 12 is set using a potentiometer 19 depending on the threshold sensitivity of the pain receptors of the skin, it is clear below the level of pain, and the frequency of this signal, based on the reduction parameters of a pinion gear consisting of a gear the rails 9 and gears 8, as well as the generator 12, is 5-10 Hz, i.e. exceeds the frequency of peremechtsenia strips 1 and 2, which is rational for the implementation of the effect of electrical stimulation of muscles.

Thus, the proposed carpal esp) Scherch contributes to the high efficiency of developing the strength of the finger fingers and forearm, determined by the combined vibrostimulation and electrostimulation effects, i.e. complex electromechanical effects. It provides enough complete physiologists.

The activation of these targets due to the involvement in the activity of a relatively large number of motor units and makes it possible to fully manifest the contractile abilities of the nerve apparatus of the hands.

The ability to control the magnitude of the generated signal eliminates possible discomfort for the trainee in the event of a maximum signal being generated.

Formula of invention

Carpal expander auth. No. 1251929, characterized in that, in order to improve the performance of the finger and forearm training, it is equipped with a reversible generator of an adjustable electrostimulating signal and electrodes connected in parallel with it, while the generator is mounted on a tide carrying glass with a pinion gear, the shaft is rigidly connected to the gear, the electrodes are located on the side surfaces of the handles, and the latter are made of a dielectric material.

12

nineteen

FIG. 2

Type B

Fig.Z

Claims (1)

Carpal expander No. 1251929, characterized in that, in order to increase the efficiency of training the muscles of the fingers and forearm, it is equipped with a reversible generator of an adjustable electrostimulating signal and electrons connected in parallel to it, while the generator is mounted on a tide supporting a beaker with a pinion gear, its shaft is rigidly connected to the gear, the electrodes are located on the side surfaces of the handles, 20 and the latter are made of dielectric material.