DE8805647U1 - Gymnastic equipment for performing leg and/or foot gymnastics - Google Patents

Description

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Gymnastic equipment for performing leg and/or foot gymnastics

The invention relates to a gymnastics device for carrying out leg and/or foot gymnastics with at least one rocker pedai, which is movably arranged on a base and is coupled to a device at least for generating a resistance when treading down.

There is widespread need for prophylactic training to relieve the veins in the leg area in order to prevent venous insufficiency, varicose veins and muscle atrophy. Devices of the type described above have become known for this purpose, for example through US-PS 4,111,416. A device according to this US-PS is relatively complicated to construct and therefore relatively expensive. It requires many individual parts, some of them very small, to be assembled properly. For example, the pedal must be connected to the base via a shaft as a joint axis. This requires the manufacture of appropriate bearing eyes for the shaft on both the base and the pedal. In addition, the shaft itself must be present and means must be available with which the shaft can be secured against axial displacement.

The use of a spiral compression spring as a device for generating a resistance when pedaling simultaneously requires another means of preventing the spiral compression spring from expanding too much. At the same time, this spiral compression spring is very sensitive to mechanical damage and bending of _{ω ω ω} ω ω ω ω . In addition, the secure fastening of the spiral compression spring to the base on the one hand and to the pedal on the other hand is complex in terms of assembly.

The invention is therefore based on the object of proposing a device of the type described above which is more robust and functionally more reliable than the known device and which is also simpler and less expensive to manufacture and construct.

This object is achieved according to the invention, starting from a device of the type described at the beginning, in that the device for generating a resistance to depression is designed as a leaf spring, which connects the rocker arm and the base at a suitable angular position to each other at the heel end of the rocker arm. A leaf spring is a well-known technical element that is easy to attach. The dimensions of the leaf spring can easily be designed so that it has the desired spring stiffness. The spatial shape of the leaf spring, which by no means necessarily has to be flat, can also be designed practically as desired using simple manufacturing processes. The base and rocker arm can be connected to each other at a suitable angular position to each other using the leaf spring. This means that the effort required in the prior art to produce a hinge point can be completely eliminated.

A similar gymnastics device for performing leg and/or foot gymnastics has already been disclosed in US-PS ^,20^,675, which has two rocker pedals that are movably arranged on a base, whereby the entire device also has means for generating a resistance to stepping down. However, the means for generating a resistance to stepping down are designed as an elastic air bellows that is placed between the base and the rocker pedal. Here too, the rocker pedal is connected to the base without a joint axis via a leaf spring. However, the leaf spring does not form the device for generating a resistance to stepping down, but merely has the task of raising the rocker pedal again after stepping down against the resistance of the bellows with the reference number 10. This leaf spring therefore only serves as a fastening means between the base and the rocker pedal. It has therefore not been recognized that with a corresponding design of the leaf spring and with a heel-side connection between the rocker pedal and the base, the entire device could be manufactured much more simply and cheaply with the same functionality and at the same time - which is very important - could be used in a sitting position. In US-PS 4,20,675 it even remains unclear whether the leaf spring is arranged on the heel side or the toe side of the rocker pedal. The abstract of this US-PS speaks of an arrangement at the front end,

while the description in column 1, e.g. line 35, speaks of an arrangement at the rear end.

The device according to the invention can therefore be very simply constructed and for example, can be placed under any desk. While sitting at the desk, the pedal can be repeatedly pressed down against the resistance, thereby achieving the desired training effect.

According to one embodiment of the invention, it is proposed that the leaf spring is made of spring steel or a plastic of suitable elasticity. This results in a very simple and therefore inexpensive construction without compromising effectiveness.

It is further proposed according to the invention that the base and rocker pedal are formed in one piece from a spring-elastic plastic at a suitable angle to one another. This is the simplest design in terms of construction, but is nevertheless fully effective. By selecting the thickness of the spring-elastic plastic, at least in the connection area between the pedal and the base, the resistance when treading down can be predetermined.

In particular, in the case of a double pedal design, the invention proposes that a bridge be arranged between the two pedals, which extends beyond the rest position of the pedals. This is extremely important in the case of a double pedal design, because it prevents the foot from becoming trapped between a depressed pedal and the adjacent pedal in the rest position. In this case, the invention also proposes that the base and bridge be made in one piece. This greatly simplifies manufacture, assembly and handling.

According to a variant of the invention, it is provided that each pedal is assigned at least one tongue-shaped leaf spring on its underside, extending in the direction of the pedal's longitudinal extension, for the free end of which a stop is provided on the base,

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Each pedal is supported by the underside of the leaf spring on the base, which is held in at least partial contact with the base by a holding-down device. This allows the base and pedal to be designed as a plug-in unit. The parts can be easily taken apart and stored. At the same time, production and storage are made easier.

It is then further proposed according to the invention that two leaf springs are provided for each pedal. This creates a secure lateral support base without the leaf spring having to extend over the entire width, while at the same time using material economically. In addition, the spring stiffness is easier to adjust with this design.

In addition, each leaf spring is firmly connected to the pedal on the pedal side. This avoids relative movements between the leaf spring and the pedal, which would lead to wear.

Furthermore, according to the invention, it is proposed that each leaf spring is formed as one piece with the pedal. This allows a harmonious coordination of the leaf springs to be achieved while at the same time making production inexpensive and fixing measures and fastening means for attaching the leaf spring to the pedal can be avoided.

It is further proposed according to the invention that the holding-down device has a clip arranged transversely to and on the top of the leaf spring, the legs of which are held and guided in openings of holding pieces of the base. This is a simple option for fastening between the pedal and the base, with which the free spring length of the leaf springs can be determined at the same time.

In addition, the invention proposes that for each leaf spring in the base a groove corresponding to the dimensions of the leaf spring is provided for receiving the leaf spring.

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Such a groove represents a proper insertion groove, so that good lateral guidance of the pedal is achieved via such a plug connection. To this end, it is then further proposed that the groove be of such a length that the stop for the leaf spring is formed by the front side of the groove. This determines the insertion depth and at the same time separate stop means can be avoided.

In order to produce different free spring lengths and thus different spring stiffnesses and thus different depression resistances for the pedals, it is proposed that the clasp of the corset holding device be adjustable in the longitudinal direction of the leaf spring. This allows the free bending length of the leaf spring to be changed. This also changes the force required on the pedal to bend the leaf spring and thus to depress the pedal. In addition and as a further development, it is proposed that the clasp extend across both leaf springs at the same time. This makes both handling and production particularly easy and prevents different bending lengths from being set on the two leaf springs of a pedal due to incorrect operation.

According to the invention, it is further proposed, particularly with regard to the double pedal design, that the bridge is designed as a hollow body that is only open at the bottom. This simplifies production, uses less material and keeps the device light.

In addition, the invention also provides that the base is made of two plates, one of which is molded onto an associated side wall of the bridge. This creates a one-piece design that is easy and inexpensive to manufacture, has sufficient stability and is light.

In addition, the invention also provides that the panels are surrounded on their free sides by an edge web extending downwards. The edge web stabilizes the panels so that they can be kept thinner, and at the same time construction space is created in the lower area.

According to the invention, it is also proposed that the web extends beyond the base at least in the direction of the free end of the rocker arm. As a result, the base itself can be kept quite small in terms of its depth without the tipping stability of the device being negatively affected when it is operated.

It is further proposed according to the invention that each rocker has a heel support edge. Such a heel support edge is easy to shape and allows comfortable foot support, particularly when seated.

A further embodiment of the invention provides that at least each rocker arm has insertion guides as a connection, into which a free end of a leaf spring can be inserted or is inserted. Such insertion guides can be molded at the same time as the rocker arm is manufactured, for example if the rocker arm is made of plastic. The rocker arm can then be attached very easily by simply inserting a free end of the leaf spring. Manufacturing and assembly are therefore very simple. If necessary, the leaf spring can be cast, glued or screwed in the inserted position. However, other additional fastening options are also conceivable.

In addition, the invention provides that the slide-in guides for the rocker pedals are arranged on the underside of each pedal. They can thus be completely covered by the rocker pedal, so that the exterior of the device can be designed more attractively and any contact of the foot with the leaf spring or the leaf spring attachment can be avoided. In addition, the length of the device is shortened because the leaf spring does not have to protrude at the back. The entire rear area between the rocker pedal and the base can be covered by a cover apron, so that a harmonious exterior of the device can be achieved without impairing its function. At the same time, this slightly forward spring arrangement, which is only possible because the leaf spring is on

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A lighter version of the leaf spring can be arranged on the underside of the rocker arm.

In addition, the invention also provides for the base to have slide-in guides on the underside, i.e. in the area of the installation space already mentioned, of the panels surrounded by a downward-facing edge bar. Here too, the slide-in guides are very easy to form and, in the manner already described for the rocker arm, facilitate the assembly of the leaf spring and thus the entire device.

In addition, the invention provides that the plates have at least one insertion channel on their top side, which is offset downwards and has one end that runs through to the outer edge, the second end of which, opposite the first end, ends in front of the insertion guide and is open towards it. This means that each insertion guide of the stand is easily accessible for the leaf spring and at the same time the leaf spring can be guided in the insertion channels as soon as it is inserted. The stand can thus be guided with its plates up to the rear edge of the rocker arm, which improves the stability of the device.

According to a variant of the invention, it is proposed that the base and the bridge are detachably connected to one another. This has advantages in terms of transport, because the individual parts can now be folded together more flatly and stored in a more space-saving manner. In addition, the associated molds can be made cheaper to manufacture.

In addition, it is suggested that at least the bridge is designed as a solid body. For the production of a solid body, especially if it is to be cast from plastic, only very simple molds are necessary, so that the manufacturing mold and thus the manufacturing costs can be further reduced. The solid body also has a not inconsiderable weight, which is very advantageous when using the device, for example on smooth floors, such as stone floors, if the device is equipped with small rubber feet.

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This prevents the device from slipping when you start training.

In addition, it is suggested that the bridge be screwed to the base. In the non-one-piece version, this is a very simple and easy-to-prepare fastening method and is particularly advantageous if - as suggested - the base is designed as a one-piece plate that supports both rocker arms. This makes screwing to the bridge much easier.

It is further proposed according to the invention that each leaf spring is detachably attached to the base with a free end. This makes assembly much easier and allows the leaf spring to be replaced quickly. It is therefore additionally proposed that the detachable attachment is designed as a screw connection.

In a further additional embodiment, it is proposed that the base has recesses on its top side to accommodate one leg of the leaf spring. In these recesses, which are of a corresponding shape, the leaf spring can be guided laterally and its position limited in the direction of the end of the free leg of the leaf spring. The recesses thus provide very simple means for positioning the position of the leaf spring during assembly of the device.

In addition, it is also suggested that the recesses are open towards the front edge. This simplifies the shape and makes it easier to insert the leaf spring.

According to the invention, it is then further provided that each insertion guide has at least one guide rail with an interruption and it is also provided that the leaf spring has an expanding tongue on at least one leg. If the leaf spring is inserted to the correct depth, the expanding tongue falls into the said interruption, so that the leaf spring is thus fixed in its position

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locked ;sr O ^M rr ^h °in |«^t pressing in the expanding tongue, the leaf spring can be removed again without any problem. However, if the expanding tongue is not pressed in, the leaf spring is held securely in its position. This assembly-friendly design is achieved with the simplest of means.

The invention will now be explained in more detail with reference to the accompanying drawings, which show embodiments.

Show it:

Figure 1 View of the base in the direction of arrow I in Figure 2

Figure 2 View in the direction of arrow 11 in Figure I

Figure 3 Variant in view according to arrow III in Figure ti

Figure ti View in the direction of arrow IV in Figure 3

Figure 5 Embodiment of a leaf spring in side view

Figure 6 View in the direction of arrow Vl according to Figure 5

Figure 7 Gymnastic device in perspective with leaf spring as connection between base and pedal

Figure 8 Gymnastic equipment in perspective and in one-piece design

Figure 9 Gymnastic equipment in perspective with tongue-like

Leaf springs below the pedal (pedal shown transparent)

- 15 Figure 10 Section A-B according to Figure 9

Figure 11 Pedal in section C-E according to Figure 12

Figure 12 View in the direction of arrow XIl according to Figure 11

Figure 13 Pedal in view according to arrow XlII in Figure 14

Figure 14 Section E-F according to Figure 13

Figure 15 View in the direction of arrow XV according to Figure 16
and Figure 1

Figure 16 Section H-G according to Figure 1

Figure 1 shows a one-piece base 5 essentially consisting of the plates 2 and 3 and the central web 43. The plates 2 and 3 are integrally formed on the side walls 7 and 8 of the web 43 and extend laterally away from it. The plates 2 and 3 are formed slightly higher and are bordered on their free sides by a downwardly extending edge web 4, so that a hollow body is created, as can be clearly seen in the view according to Figure 15 and Figure 16. The lateral extension and the extension in depth of web 43 and plates 2 and 3 can be clearly seen in the top view according to Figure 2. Here it can also be seen that the web 43 extends significantly beyond the depth of the plates 2 and 3, particularly in one direction. This projection 23 extends in the direction of the free end of the rocker arm and improves the stability of the device during operation, so that the depth of the plates 2 and 3 can be kept relatively small without loss of stability.

Figures 3 and 4 show views of a variant of the device according to the invention, as shown in Figures 1 and 2. However, Figures 3 and 4 show a device which does not consist of

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Plastic is hollow, like the base in Figures 1 and 2, but rather consists of solid material and is not made in one piece (which would be possible without any problem), but rather consists of two individual parts, namely the web 44 on the one hand and the base 6 designed as a continuous plate on the other. Approximately in the middle, the base 6 can have a groove 24 extending in the direction of the web 44 to be arranged, into which the web 44 can be inserted. In this position, in the correct longitudinal position, as shown in Figure 3 and already described for Figures 1 and 2, the web 44 can be screwed to the plate 6 via screws 25 passing through it. This creates a solid, relatively heavy device according to the invention, which can, however, be manufactured with very simple tools and can be stored in the individual parts in a space-saving manner. Shipping can also be done in small-volume packages because web 44 and plate 6 can be laid flat on top of each other for shipping.

Both the embodiment according to Figures 1 and 2 and the solid embodiment according to Figures 3 and 4 can have openings 26 on the underside of the respective plate 5 or 6 for the accommodation of, for example, rubber feet. This achieves a high level of stability. Due to such rubber feet, a high level of stability is achieved, particularly in the solid embodiment according to Figures 3 and 4, even if the floor on which the device is placed has, for example, smooth stone tiles.

As can be seen from Figures 1, 15 and 16, the plates 2 and 3 have slide-in guides 11 on the underside, which are accessible from the front via an inlet channel 14, which is open on its inner front side towards the slide-in guides 11. The upper limit of the slide-in guides 11 forms the underside of the base 5, while the lower limit is formed by two guide rails, of which the guide rail 21 has an interruption 19 in the course of its longitudinal extension. The free end 12 of an approximately U-shaped leaf spring 9 (see Figure 5) fits into these guide rails 11, whereby this free end 12 in the

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Near its end, it has an expanding tongue 18, as can be seen in Figure 5. The free end 12 is pushed into the insertion guide 11 until the front end hits a rear transverse rib 27 provided there. In this position, the expanding tongue 18 can spring into the break 19 so that the leaf spring 9 can no longer be pulled out. Nevertheless, it is still easy to disassemble. It is sufficient to simply push the expanding tongue 18 upwards a little and the leaf spring 19 can be easily pulled out again. However, it cannot be pulled out or slipped out accidentally.

In a similar way, the free end 13 of the leaf spring 9 with the spreading tongue 17 provided there can be pushed into an insertion guide 10 which is arranged on the underside of a rocker arm 1 (see Figure 11). The upper limit of the insertion guide 10 is again the underside of the rocker arm 1, while the lower limit is formed by guide rails , of which the guide rail 22 has the interruption 20 in its longitudinal course. There is sufficient free space 28 in front of the insertion guide 10 to bring the free end 13 of the spring 9 into position for insertion into the insertion guide 10. The free end 13 can now be pushed in until the front end abuts against a transverse rib 29. In this position, the spreading tongue 17 falls into the interruption 20, whereby the spring 9 is secured against accidental withdrawal - as already described. If the spreading tongue 17 is lifted slightly, the leaf spring 9 can be pulled out again without any problem.

On the upper side, the rocker arm 1 can be provided with a web-like ribbing 30 and can be equipped with a heel support edge 69 at the heel end.

If the free end 12 of the leaf spring 9 is inserted into the insertion guide 11 of the base 5 and the free end 13 of the leaf spring 9 is inserted into the insertion guide IQ of the rocker arm 1, the leaf spring 9 is completely covered by the rocker arm and, due to the corresponding design of the leaf spring 9, the rocker arm 1 is simultaneously held in the correct

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The inclination is held securely on the base 5. The leaf spring 9 generates the necessary resistance to depression of the device assembled in this way and at the same time the rocker pedal is held and guided correctly and can be swiveled without a joint bearing in the conventional sense being provided for this purpose. The entire device in the described embodiment is extremely light and inexpensive to manufacture and extremely easy to assemble. The base and the rocker pedals are preferably made of plastic.

1 and 2 and 15 and 16 is designed like a hollow body, the design according to Figures 3 and 4 is made from solid material, e.g. cast from solid material. The design made from solid material can be made either in one piece or, as shown in Figures 3 and 4, in several parts. In this embodiment too, the connection to the rocker arm 1 is made via a leaf spring, which is designed very similarly to the leaf spring according to Figures 5 and 6. The attachment for the leaf spring in the solid design according to Figures 3 and 4 can also be made via a slide-in guide in a very similar way to the embodiment already described. In order to accommodate such a slide-in guide, however, the solid base 6 would have to have a cavity in the area of the slide-in guide that is accessible from the underside and is limited to the slide-in guide. In the embodiment according to Figures 3 and 4 , however, the leaf spring is screwed onto the base 6 in a suitable position. For this purpose, the base 6 has recesses 15 in a corresponding position, the width of which is preferably adapted to the width of the leaf spring used. These recesses are open towards the front edge 16. A corresponding leaf spring can then be inserted into these recesses 15. If the leaf spring itself has corresponding threaded holes on an associated free leg, then it is sufficient if corresponding holes 31 are provided through the base 6 through which a suitable screw can be passed. However, it is also possible to provide threaded holes 32 in the plate 6 itself if the leaf spring has corresponding through holes.

l\cic!'.· Examples of embodiments are shown in Figures 3 and U ,

If the !'!att spring used is screwed on according to this embodiment, at least the expansion tongue 18 is no longer required.

Figure 16 shows the arrangement of a leaf spring 9, inserted into the insertion guide 11 of the base 5. The free end 13 of this leaf spring 9 is now ready to receive the rocker arm 1. To do this, this free end 13 must be inserted into the fin- ger I (j rip«; VL'innfHalc 1 u/i*=) already described above. The inclined starting position of the rocker arm 1 is determined by the inclination of the free end 13 of the leaf spring 9.

Figure 7 shows a perspective view of a simplified design in which only one rocker arm k7 is connected to a base kb via a leaf spring <i8. This rocker arm can be intended for only one foot or can be wide enough to accommodate both feet. This design also has a heel support edge 33. Here, the rocker arm k1 and base k6 are connected to one another in the area where they meet in an initial position or angled position suitable for operation by a leaf spring which is folded or angled or bent lengthwise accordingly. The type of connection can be any, i.e. also as described so far. The leaf spring can also be made of spring steel or of one of the spring-elastic plastics known today.

Figure 8 shows a one-piece embodiment. Both the base 9 and the rocker 50 are preferably made of the same resilient plastic and are connected to one another in a suitable angular position along an edge 51 in one piece by means of a connecting arch 52. The resistance to stepping down can be determined by the cross-sectional thickness 53 of the connecting arch 52. Here, too, the rocker 50 has a heel support edge 3U .

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Figures 9 and 11 again show a two-pedal embodiment, with Figure 9 being a perspective view in which the rocker pedal kk' is shown in a transparent version. This allows one to look through this rocker pedal kk' to the top of the base 57. The base 57 has two grooves 66 running parallel along its length and at a distance from one another, which extend over a portion of the length of the base 57. Between the two grooves 66 and laterally outside the two grooves, holding pieces 62, 63 and Gk are provided, which have through openings 65 running parallel to one another and running transversely to the grooves 66. These openings 65 are suitable for receiving the legs 60 and 61 of a clip 59. The clip 59 can extend over both grooves 66, as shown in Figure 9.

3c of the pedal kV and kk' has on its underside two tongue-shaped leaf springs 55 which can be integrally connected to the rocker pedal kV or kk' on its underside (see Figure 10) and which are designed in such a way that they each fit into a groove 66. The length of the groove 66 is dimensioned such that the front end of this groove can serve as a stop 58 for the free end 56 of each leaf spring 55. In the arrangement shown (see Figure 10), there is a free flexible part or a free flexible length 67 for each leaf spring 55 which determines the resistance when the pedal kV or kk' is depressed in the direction of the arrow 68. This free flexible length 67 can be changed by moving the clip 59 with its legs 60 and 61 in the area of the openings 65 .

In order to prevent pinching between, for example, a depressed pedal kk' and a pedal k'i' in the rest position, there is also a bridge 5k between these two pedals that is so high that it exceeds the respective rest position of both pedals or at least ends with it. It is then no longer possible for a foot to get caught in the adjacent pedal. The base 57 can be designed as one piece with the middle bridge 5k, but can also be plugged into it.

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A heel support edge G ¹ ·) formed integrally on the respective pedal can serve to support the heel or the shoe. An apron 70 can be formed on this, which covers the base 57 in the front area.

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List of reference symbols used

I Wippedai t plate I plate Edge bar » Stand t Stand t Side wall I Side wall » Leaf spring Io Slide guide ti Slide guide 12 free end 13 free end Introduction channel i5 Deepenings t6 front edge t7 Spread tongue Is Spread tongue 19 Interruption So Interruption fci Guide rail 22 Guide ski ^ 23 Got over ti Groove 25 screw 26 opening 27 Cross rib 28 free space 29 Cross rib

- 23 - R ^: ifelung 30 Drilling 31 Threaded hole 32 Heel support edge 33 Heel support edge 34 unused 35-42 web 43 Wippedal 43 ¹ Bridge (solid) 44 Wippedal 44' unused 45 Stand 46 Wippedal 47 Leaf spring 4S Stand 49 Wippedal 50 Edge 51 Connecting arch 52 Cross-sectional thickness 53 web 54 Leaf spring 55 free end 56 Stand 57 attack 58 brace 59 leg 60 leg 61 Holding piece 62 Holding piece 63 Holding piece 64 openings 65 Groove 66 free flexible part 67 Arrow 68

69 Heel support edge

70 Apron

Claims (34)

1. Gymnastic device for carrying out leg and/or foot gymnastics, with at least one rocker (1, 43', 44', 47, 50) which is movably arranged on a base (5, 6, 46, 49, 57) and is coupled to a device at least for generating a resistance to treading down, characterized in that the device for generating a resistance to treading down is designed as a leaf spring (9, 48, 55), the rocker (1, 43', 44', 47, 50) and base (5, 6, 46, 49, 57) are in an angular position to one another on the heel-side flange (11) with pins (12) for fastening the rocker (1, 43', 44', 47, 50) to the base (5, 6, 46, 49, 57).
&ugr; - - &mdash; - &mdash; ■■ -&pgr;"■■.-.&mdash;-. .. iiii»! r· · ·■ · · 2. Device according to claim 1, characterized in that the leaf spring (9, 48, 55) is formed from spring steel or a plastic gBAJgnoTflr elasticity. 3. Device according to one of claims 1 and 2, characterized in that the base (9) and the rocker arm (50) are formed in one piece from a spring-elastic plastic in an angular position to one another (Figure 8). 4. Device according to one of claims 1 to 3, characterized in that two rocker arms (1,43',4V) which can be operated independently of one another are arranged at a common base (5,6,57). 5. Device at least according to claim 4, characterized in that a web (43, 44, 50) is arranged between the two pedals (1, 43', 44') which extends beyond the rest position of the pedals. 6. Device according to claim 4 and 5, characterized in that the base (5) and the web (43) are formed in one piece. /. Device according to at least one of claims 1 to 6, characterized in that each pedal (43 ¹ , 44') is assigned at least one tongue-shaped leaf spring (55) on its underside, extending in the direction of the longitudinal extent of the pedal, for the free end (56) of which a stop (58) is provided on the base (57), each pedal being supported by the underside of the leaf spring (55) on the base (57), which is held in at least partial contact with the base (57) by a hold-down device (59-64). 8. Device at least according to claim 7, characterized in that two leaf springs (55) are provided for each pedal (43', 44'). 9. Device at least according to claim 7, characterized in that each leaf spring (55) is firmly connected to the pedal (43', 44') on the pedal side. 3 - 10. Execution at least according to claim 7, characterized in that each leaf spring (55) is formed integrally with the pedal ('#3', '*<&diams;'). 1!. Device at least according to claim 7, characterized in that the holding-down device (59-60) has a clip (59) to be arranged transversely to and on the upper side of the leaf spring (55), the legs (60, 61) of which are held and guided in openings (65) in holding pieces (62-60) of the base (57). 12. Device at least according to claim 7, characterized in that for each leaf spring (55) in the base (57) a groove (6ω) corresponding to the dimensions of the leaf spring (55) is provided for receiving the leaf springs (55). 13. Device at least according to claim 12, characterized in that the groove (66) has such a length that the stop (58) is formed by the front side of the groove (66). IU. Device at least according to claim 7, characterized in that the clip (59) of the hold-down device (59-6<f) is arranged to be adjustable in the longitudinal direction of the leaf spring (55) in order to change the spring stiffness of the freely flexible part (67) of each leaf spring (55). 15. Device according to at least claim 8 and claim 11, characterized in that the clip (59) extends across both leaf springs (55) simultaneously. 16. Device according to at least claim 1, k, 5 and 6, characterized in that the web (43) is designed as a hollow body open only downwards. 17. Device according to claim 16, characterized in that the base (5) is formed from two plates (2,3), one of which is molded onto an associated rope wall (7,5) of the web (^3). 18. Device according to claim 17, characterized in that the plates (2, 3) are surrounded on their free sides by a downwardly extending edge web (k) . IV. Device at least according to claim 6, characterized in that the web (O,^,5^) projects beyond the base (5,6) at least in the direction of the free end of the rocker arm (l,U 3',^'). 20. Device according to at least claim 1, characterized in that each rocker arm {\,kk\kV) has a heel support edge (69) at the heel-side end. 21. Device at least according to claim I, characterized in that as a connection at least each rocker arm (1) has insertion guides (10) into which a free end (13) of a leaf spring (9) can be inserted or is inserted. 22. Device according to claim 21, characterized in that the insertion guides (10) for the rocker arms (I) are arranged on the underside of each rocker arm (1). 23. Device according to claim 21 or 22, and IS, characterized in that slide-in guides (11) associated with the side foot (5) are provided on the underside of the plates (2,3) surrounded by a downwardly directed edge web {k\ . 2k. Device according to claim 23, characterized in that the plates (2, 3) have on their upper side at least one insertion channel (1^) which is offset downwards and has one end extending through to the outer edge, the second end of which, opposite the first end, ends in front of the insertion guide (11) and is open towards it. 25. Device according to one of claims 1, 2, 4 and 5, characterized in that the base (6) and the web (44) are detachably connected to one another. 26. Device according to claim 25, characterized in that at least the web (44) is designed as a solid body. 27. Device according to claim 26, characterized in that the web (44) is screwed to the base (6). 28. Device according to one of claims 25-27, characterized in that the base (6) is designed as a continuous, one-piece plate supporting both rocker arms (1). 29. Device according to at least one of claims 21 or 28, characterized in that each leaf spring (9) is detachably fastened to the base (5, 6) by a free end (12). 30. Device according to claim 29, characterized in that the releasable fastening is designed as a screw connection. 31. Device according to claim 29 or 30, characterized in that the StancMuß (6) has recesses (15) on its upper side for receiving one leg of the leaf spring (9). 32. Device according to claim 31, characterized in that the recesses (15) are open towards the front edge (16). 33. Device according to one of claims 1 to 32, characterized in that the leaf spring (9) has an expanding tongue (17, 18) on at least one leg. 34. Device according to one of claims 1 to 33, characterized in that each of the insertion guides (10, 11) has at least one guide rail (21, 22) having an interruption (19, 20).