A repetitive jumping device for sport and recreation belongs to devices enabling the user to leap on the spot or when moving, whereby he develops and improves his physical strength and sense of balance in rapidly changing spatial conditions of the body.

The problem solved by the present invention is how to make possible, by a new struc¬ ture of the afore-mentioned device, repetitive leaping of the user in many different exercise patterns and at the same time make possible a continuous connection of the user with the said device so that he might control the direction and intensity of each leap irrespective of its pattern and of his position with regard to the said device and to his environment owing to executing different figures and keeping the balance by changing his body, arm and leg positions, as well as immediately undo the connection whenever he wishes to do so, e.g. at losing his balance or at the end of the exercise.

A repetitive jumping device for sport and recreation of the above-described kind is known and is composed of a helical spring with a plate arranged at the end thereof and with a pole projecting out of the plate coaxially with the said spring. Loops for the user's feet are provided on the plate.

The user stands on the plate with his feet inserted into the loops, the said pole ex¬ tending between his feet up to his stomach or to his chest and being held by him. The connection between the device and the user is achieved by holding of the pole and keeping the feet in the loops. By leaping the spring is activated and amplifies the leaps. By a change of the stance of the user with regard to the pole, the common centre of gravity of the device and the user changes and so does the direction of the leap.

It is a drawback of the described solution that due to the feet of the user being stuck on the plate often an unwanted fall occurs since at a sudden loss of balance it is im¬ possible to pull both feet out of the loops in time. Another drawback lies in that the holding pole fixes the position of the arms in front of the body, which reduces the possibility of creating different figures.

Another disadvantage of the said device is that the pole extending immediatelly in front of the user hinders him at changing the centre of gravity of the user-device unit, which reduces the possibilities of application and too often results in a fall.

The problem is solved by a device according to the invention, which is is composed of two plates with springs arranged between them and of two ropes arranged on the opposite edges of one plate and having handles at their free ends. The said plates are shaped in such a manner that one of them i.e. the lower one is intended for abutting non-slippingly on the base and for rebounding therefrom, and the upper one is in¬ tended for the user to stand freely upon it and also allows the shifting from one foot to the other in order to change the centre of gravity. With both ropes the user pulls the plate towards his feet and he can flail his arms around in order to keep his balance or hold the plate pressed against his feet in any stance. If he loses his balance, the user drops the handles of the rope so that the device freely springs off and the user can regain his balance and step on the base or catch himself on all fours.

Further, the device according to the invention enables the user to take any stance on the plate, therefore he can create many new jumps and figures.

The characteristic features of the device according to the invention are described in the continuation with regard to the accompanying drawings wherein

Fig. 1 shows the device in a perspective view from the side of the user, and

Fig. 2 shows the device in perspective view from the side of the abutting on the base.

The repetitive jumping device for sport and recreation is basically composed of two plates 1 and 2 with springs 3 arranged between them, and of two ropes 4 arranged on or at opposite edges 5 of the plate 2 and having optionally shaped handles 6 at their free ends. The plate 1 is intended for abutting on the base and the plate 2 is intended for the user to stand upon it. Both plates 1 and 2 are shaped approximately as a rec¬ tangle or an oval. The abutting surface 7 of the plate 1 is provided with an elastic marginal section 8 having discontinuities 9 in several places, and with a central, preferably cylindrical and elastic element 10, whose height is preferably greater than the height of the section 8. The plate 2 is bent along the edges 5 in a direction op¬ posite to the one of the spring 3.

The number and arrangement of the springs 3 is optional but they have to ensure equal pressure force of both plates 1 and 2 on all points thereof. The springs 3 are preferably helical, however, any other kind of springs can be applied.

The section 8 and the element 10 are made of elastic material having a high friction factor e.g. rubber, polyurethane and similar, and the upper surface of the plate 2 is made of a rigid material having a high friction factor e.g. emery paper, very much like skateboards.

Optionally, the said device can comprise deflection limiting means 11 of both plates 1 and 2 in order to reconciliate the characteristics of the springs with the expected usage. In the preferred embodiment the deflection limiting means 11 are designed as elastic covers of the springs 3, which absorb the deflection when the threads of the spring 3 abut against each other.

The subject of the invention is manufactured in a known manner as it is clear from the description and drawings. There is no need for special technology or use of spe¬ cial materials in order to achieve a good operation.