EP3628184A1 - Stick attachment - Google Patents

Abstract

Stick attachment for a stick (11), in particular a Nordic walking, hiking or tracking stick, which has a stick holder which extends along an axis, the stick holder for receiving one end of a stick and for producing a force-transmitting Connection with the stick, and a contact zone, which serves to transmit power from the stick attachment to a surface, characterized in that the contact zone is formed as a single contact edge and a first sliding surface and a second sliding surface are formed, the two sliding surfaces continuously reduce their distance from one another along the stick attachment to the contact edge and meet at the contact edge.

Description

Technical field The invention relates to a stick attachment. background

Nowadays Nordic Walking is a sport with an international reputation (see e.g. website of the International Nordic Walking Federation: http://www.inwa-nordicwalking.com). This sport is an endurance sport, whereby the use of Nordic walking sticks, which are guided with the hands in rhythm with the steps, has a supportive effect when walking quickly. Such a stick is used to transmit the force between a user's hand that presses the stick against the ground and the ground with which the stick interacts. This transmitted force as well as its temporal influence is called stick thrust in the following. The stick is used to support or support the forward movement of a user. In order to ensure optimum transmission of the stick thrust, such a stick has a high stability and can be made, for example, of aluminum or carbon fiber reinforced plastic (CFRP) or also of a CFRP / glass fiber mixture, etc.

A removable Nordic walking stick attachment, usually made of rubber, on the tip of such a stick, which is usually made of metal, can prevent noise when used on asphalt or stony ground. Such attachments are also known as rubber buffers, Nordic walking pads, or asphalt pads. They have an oval or rectangular underside, hereinafter referred to as the contact surface. Depending on the manufacturer, such contact surfaces are designed in different curvatures and radii and are provided with different profiles to ensure better grip.

However, since such a pad is only optimized or suitable for asphalt and there is too little grip on loose surfaces such as sand or gravel to transmit the stick thrust, the pad is removed on sand or gravel before using the stick so that the Metal tip of the stick is used. The metal tip offers adequate support on loose surfaces. However, the metal tip causes an unpleasant scratching noise when dragging the respective stick while the metal tip is dragging over the surface. During this sequence of movements, the handle of the respective stick is released and the stick is pulled forward by its handle loop.

Known pads also show considerable signs of wear during their use, which lead to a completely different shape compared to the original shape of the pads. With the deformation of the pads, the originally intended effect of the pads is lost.

Against this background, the object of the invention is to provide an improved solution in which the problems mentioned are avoided.

Summary of the invention

This object is achieved by a stick attachment according to claim 1.

The object of the invention is therefore a stick attachment for a stick, in particular a Nordic walking, hiking or tracking stick, which has a stick holder that extends along an axis, the stick holder for receiving one end of a stick and serves to establish a force-transmitting connection to the stick, and a contact zone, which serves to transmit force from the stick attachment to a surface, characterized in that the contact zone is designed as a single contact edge and a first sliding surface and a second sliding surface are formed, wherein the two sliding surfaces continuously reduce their distance from one another along the stick attachment towards the contact edge and meet at the contact edge.

This object is also achieved by a stick according to claim 13, which is equipped with a stick attachment according to the invention.

The stick can be a hiking or tracking stick. However, it is preferably a Nordic walking stick and the stick attachment according to the invention realizes a Nordic walking stick attachment.

The invention is discussed below in the context of these preferred forms of embodiment, to which the invention is, however, not limited.

The stick holder is used for the stable and reliable transmission of a stick push from the Nordic walking stick to the Nordic Walking stick attachment, which in turn serves to transmit power to the ground when the stick push is exerted. It is designed to be adapted to the respective floor to be accommodated.

With the help of the measures according to the invention, all of the problems discussed at the beginning are now eliminated and, in particular, the advantage is obtained that the Nordic walking stick attachment is equally suitable for all surfaces. It thus forms a universal attachment with excellent suitability for a wide variety of substrates. The only contact edge forms the only force-transmitting contact zone of the Nordic walking stick attachment when applying a stick thrust. When the Nordic Walking stick attachment is used as intended, the contact edge is oriented transversely to the walking direction. When used on loose subsoil, it allows optimal interlocking with the subsoil, because - depending on the actual condition of the subsoil, of course - it is relatively deep in e.g. loose or gravel-like subsoil can penetrate. The design as a contact edge also allows optimal power transmission on solid ground, such as asphalt, because it can interlock well with the relatively structured edge in the surface structure of the asphalt.

Likewise, the Nordic Walking pole attachment can be pulled forward or ground on the surface in accordance with the regulations after the pole thrust has been applied, because the sliding surfaces adjoining the contact edge, of which of course only one in contact with the surface during the sliding movement on the surface is to allow trouble-free. Any wear of the Nordic walking stick attachment that leads to unusual deformation is prevented by the already planned provision of the sliding surfaces, which are intended for sliding or grinding on the ground. They are shaped so that when sliding or grinding on the surface, the contact edge remains largely contact-free with the surface or remains largely unloaded when it comes into contact with the surface, so that there is as little wear on the contact edge as possible.

The formation of two sliding surfaces, which are located on both sides of the contact edge, on the one hand facilitates the assembly of the Nordic walking stick attachment, because here it is only necessary to ensure that the contact edge is actually transverse to the planned or intended direction of movement of Nordic Walking -Stocks oriented, on which the Nordic walking stick attachment is attached. On the other hand, this double-sided design of the sliding surfaces also allows for uniform wear on both sides over the period of use, because the Nordic walking stick attachment to achieve this uniform wear can simply be rotated regularly by the user over the course of time.

Further, particularly advantageous refinements and developments of the invention result from the dependent claims and the following description.

The stick holder is preferably a tubular recess at that end of the Nordic walking stick attachment that lies opposite the contact edge. The orientation of the tubular recess or bore is characterized by said axis. This axis can deviate from the longitudinally oriented axis of symmetry of the Nordic walking stick attachment or can also be oriented such that it or its extension does not intersect the contact edge. According to a preferred embodiment, however, the contact edge intersects the axis or its extension, in particular at a right angle. The axis of the pole holder particularly preferably also forms the longitudinally oriented axis of symmetry of the Nordic walking pole attachment. On the one hand, this enables a stable holding of the Nordic walking stick as well as an optimal power transmission from the Nordic walking stick to the contact edge. The stick holder can, however, also be designed in the form of a spike or pin in order to be able to insert it into an opening at the lower end of the Nordic walking stick. This mandrel or pin-shaped design can also be characterized by said axis.

Particularly preferably, measured at the contact edge between the first sliding surface and the axis is a first acute angle and measured the contact edge between the second sliding surface and the axis a second acute angle. On the one hand, this enables wedge-like or cutting-like penetration of the contact edges into a loose surface, such as sand, forest floor or leaves. On the other hand, this form of training also allows reliable interlocking with gravel or heavier scree, etc., as well as asphalt or even wet asphalt. This ensures an essentially non-slip power transmission for the most varied types of loose as well as solid ground when using the pole as well as when applying the pole thrust.

The two acute angles can fundamentally differ from each other. However, it has proven to be particularly advantageous if the two acute angles are the same. This enables uncomplicated mounting on a Nordic walking stick, because apart from the transverse orientation of the contact edge in relation to the intended direction of movement of the Nordic walking stick, no further orientation-specific measures need to be taken into account.

It had also proven to be particularly advantageous that the Nordic walking stick attachment was constructed with mirror symmetry with regard to the two sliding surfaces with respect to the contact edge and along the axis. This enables problem-free handling and, above all, the reliable development of effects while the stick thrust is carried out - namely regardless of whether the Nordic Walking stick attachment (taking into account the requirement that the contact edge is oriented transversely to the intended direction of movement of the Nordic Walking stick is) rotated in one direction or the other by 180 °.

Furthermore, it has proven to be particularly advantageous that the two sliding surfaces, viewed from the contact edge along the axis, have a shape that deviates from the flat shape and is curved outwards. Viewed from the side, i.e. in the direction of view along the contact edge, the sliding surfaces have a circular segment that is curved to the left or right. When viewed obliquely, the gliding surfaces appear barrel-shaped or as segments of a barrel or a pipe.

According to a further aspect of the invention, that part of the Nordic walking stick attachment which is bordered by the two sliding surfaces forms a contact part to come into contact with the ground. It is advantageous here if the contact part has a length in the range from 25 to 35 mm, preferably 30 mm, and has a (for example maximum defined) thickness measured between the two sliding surfaces at its point furthest from the contact edge. The value of the thickness can be in the range of 20-30 mm, preferably a value of 26 mm. For these listed value ranges, there is an optimal size of the Nordic walking stick attachment to achieve the effects discussed in the movement sequences to be expected to be carried out by a user.

The curvature of the outwardly curved shape of the two sliding surfaces essentially follows the curve which, when the Nordic walking stick attachment is used as intended, attaches itself to a Nordic walking stick after the stick has been pushed when pulling the Nordic forward -Walking-Sticks, i.e. when sliding the Nordic Walking-Stick attachment on the ground.

The entire movement sequence for Nordic Walking is such that the pole is used when the pole is inclined at approximately 65 ° with respect to the horizontal surface. The stick thrust is then carried out during an angle change towards an inclination of 40 °. Then the stick is reground and raised again to the previously mentioned inclination of 65 ° and the sequence of movements is repeated.

The curve mentioned in the typically existing course of movement can be approximated by a shape which changes in its curvature. However, the outwardly curved shapes of the sliding surfaces are particularly preferably defined by a circle segment, the position or orientation as well as the radius of which is defined by the length or thickness of the contact part. Within the aforementioned value ranges for the dimensions of the contact part, the circle segment mentioned is defined by a radius in the range of approx. 47-165 mm.

According to a further aspect of the invention, the contact edge forms the widest point of the Nordic walking stick attachment and the Nordic walking stick attachment there has a width in the range of 25-30 mm, particularly preferably 28 mm. This measure ensures that optimal gearing with a loose base can be produced, especially when the surface deviates from the flat shape or the Nordic walking stick attachment is placed crookedly on the loose surface.

In principle, the Nordic walking stick attachment can only be formed by the contact part, so that the sliding surfaces extend to the upper end of the Nordic walking stick attachment. In order to ensure a secure hold of the Nordic walking stick on the Nordic walking stick attachment and to avoid damage due to power transmission in the connection area between the Nordic walking stick and the Nordic walking stick attachment, it has proven to be proved to be particularly advantageous that the Nordic walking stick attachment has a total height in the range of 50-70 mm, preferably 55-65 mm, and particularly preferably the area remaining above the two sliding surfaces has the shape of a cuboid or a cube or one Has prism or a truncated cone or is also shaped like a trumpet, the respective shape tapering preferably starting from the region having the two sliding surfaces. These shapes are characterized by high stability and ensure reliable power transmission between a stick and the Nordic Walking stick attachment. Such a training is also characterized by a considerable saving in material and thus also in weight, if compared with the training of the same length mentioned at the beginning of this paragraph.

It is also an advantage if the Nordic walking stick attachment is made of a softer material than the Nordic walking stick itself. Rubber-like material or rubber or rubber mixture or elastomer is preferably used for this. It is manufactured using the injection molding process. The required SHORE A hardness of the Nordic walking stick attachment is preferably in a range from 30 to 90, preferably 50 to 70, Shore. This second area corresponds approximately to the hardness of car tires. The specific value depends on the selected length or height, a longer value being able to be selected for a longer training and a lower value for a shorter training.

In summary, it should be noted that in its preferred embodiment, the universal attachment resembles a prism placed on its edge, the surfaces of which adjoining the edge are directed or oriented obliquely downwards and are curved somewhat outwards. This shape also resembles an arrowhead in cross-section. The universal attachment will be like this placed on a Nordic walking stick so that the contact edge is at right angles to the walking direction and thus provides sufficient hold on loose as well as on firm ground while the stick thrust is being applied. During the push of the stick as well as after the stick push has ended, i.e. as soon as the universal attachment slides along the ground while pulling the Nordic Walking stick forward, scratching noises, as are usually caused by a metal tip, are reliably avoided.

These and other aspects of the invention result from the figures discussed below.

Brief description of the figures

Fig. 1

einen erfindungsgemäßen Nordic-Walking-Stock-Aufsatz in einer ersten Ansicht (Aufriss);

Fig. 2

den Nordic-Walking-Stock-Aufsatz in einer zweiten Ansicht (Seitenriss);

Fig. 3

den Nordic-Walking-Stock-Aufsatz in einer dritten Ansicht (Grundriss);

Fig. 4

den Aufriss in einer vergrößerten Darstellung;

Fig. 5

den Seitenriss in einer größeren Darstellung;

Fig. 6

den Grundriss in einer vergrößerten Darstellung;

Fig. 7

den Nordic-Walking-Stock-Aufsatz beim Einsatz auf losem Untergrund;

Fig. 8A-8C

einen Bewegungsablauf bei der Benutzung des Nordic-Walking-Stock-Aufsatzes.

The invention is explained in more detail below with reference to the attached figures using exemplary embodiments, to which the invention is, however, not restricted. In the various figures, the same components are provided with identical reference symbols. They show in a schematic way:

Fig. 1

a Nordic walking stick attachment according to the invention in a first view (elevation);

Fig. 2

the Nordic walking stick attachment in a second view (side view);

Fig. 3

the Nordic walking stick attachment in a third view (floor plan);

Fig. 4

the elevation in an enlarged view;

Fig. 5

the side view in a larger representation;

Fig. 6

the floor plan in an enlarged view;

Fig. 7

the Nordic walking stick attachment when used on loose surfaces;

8A-8C

a movement sequence when using the Nordic walking stick attachment.

Description of the embodiments

In the Figure 1 a side elevation of a Nordic walking stick attachment 1 according to the invention, hereinafter referred to as attachment 1, is shown. The attachment 1 is made of rubber and has a contact part 2 and an adjoining upper part 3. The contact part 2 is used for contacting or in Coming into contact with underground 16 (see Fig. 7 or 8A - 8C) on which attachment 1 is used. The contact part 2 has a single contact edge 6 and two sliding surfaces 4 and 5 meeting on the contact edge 6.

The contact edge 6 is used to transmit power from the attachment 1 to the base 16 when exercising or when applying a stick thrust. The edge 6 also forms the widest part of the attachment 1 in the present view (elevation).

The sliding surfaces 4 and 5 serve to slide the attachment 1 on the surface 16 after the stick thrust has ended and the stick with the attachment 1 by the hand of a user (not shown here; however, see Figures 8A to 8C where the hand is visible) is pulled forward.

The attachment 1 also has a stick holder 7, which is used to hold a lower end of a Nordic walking stick (see Fig. 7 and 8A-8C ), hereinafter referred to as stick. The stick holder 7 has the shape of a conically narrowing recess and, in cooperation with the inserted end of the stick, enables a non-positive or force-transmitting connection with it in order to transmit a stick thrust or the stick to the front again after the stick thrust has been exerted pull without detaching attachment 1. The stick holder 7 extends along a central axis 8, which represents an axis of symmetry with respect to the stick holder 7. The stick holder 7 penetrates the upper part 3 and ends approximately in the middle of the lower part 2. The axis 8 also forms a central axis of the attachment 1 in the present case.

Like in the Figure 2 it can be seen, the two sliding surfaces 4 and 5 are curved outward along the contact part 2. They meet exactly at the contact edge 6, the contact edge 6 intersecting the axis 8 at a right angle. Viewed in the present side view, the upper end of the contact part 2 forms the widest part of the attachment 1 where the two sliding surfaces 4 and 5 end.

As in the synopsis with the Figure 3 can be seen, the upper part 3 has a trapezoidal shape on its outside. Upper part 3 and lower part 2 are formed in one piece.

The contact part 2 is delimited on the outside between the two sliding surfaces 4 and 5 by two side surfaces 9 and 10.

In the Figure 4 are dimensions in the enlarged elevation according to the Figure 1 registered. On its upper side, the attachment 1 has a first width B1 of approximately 18 mm. At the upper end of the contact part 2, the attachment 1 has a second width B2 of approximately 22 mm. At its lower end, that is to say at the contact edge 6, which forms the widest point in this view, the attachment 1 has a third width B3 in the range from 25-30 mm, preferably and in the present case approximately 28 mm. The upper part 3 has a first length L1 in the range of 25-35 mm, preferably and in the present case approximately 30 mm. The contact part 2 has a preferred and in the present case second length L2 of approximately 30 mm. However, the contact part 2 can also have a longitudinal extent in the range limits of the second length L2 'and L2 "between 25 and 35 mm. Accordingly, the position of the contact edge 6 varies, as is represented by three contact edges 6 running in parallel.

In the Figure 5 are dimensions in the enlarged side view according to the Figure 2 registered. As mentioned, the top 1 has the first width B1 on its upper side. The contact part 2 has a maximum thickness D1 of approximately 26 mm at its uppermost, most distant point from the contact edge 6. This is also the thickest part of the attachment 1. As in the Figure 5 can be seen, the attachment 1 to the left and to the right side of the axis 8, that is to say symmetrically with respect to the axis 8, along the entire contact edge 6. A plane (not shown) which represents the plane of the drawing Figure 5 intersects at an angle of 90 ° and runs along the axis 8, would thus form a mirror plane for the attachment 1 shown in the side elevation.

Due to the fact that the two sliding surfaces 4 and 5 continuously approach each other from the thickest point (see maximum thickness D1) of the attachment 1 to the contact edge 6 and meet at the contact edge 6, measured at the contact edge 6 now forms between the axis 8 and the respective sliding surface 4 or 5 when dimensioning the contact part 2 according to the value mentioned of the second length L2, L2 'or L2 "always a first acute angle A, A' or A" between the axis 8 and the sliding surface 4 or a second acute angle C, C 'or C "between the axis 8 and the sliding surface 5. Since the contact part 2 along its length L2, L2 or L2" is constructed symmetrically with respect to the contact edge 6 (symmetrical so in With respect to the plane spanned by the axis 8 and the contact edge 6 intersecting it), the first acute angle A is equal to the second acute angle C; the same applies to the value pairs A 'and C' as well as A "and C". In the present case, the value of the first acute angle A is approximately 44 °. The value of the second acute angle A 'is approximately 27 °. The value for the third acute angle A "is approximately 38 °.

The shape of the respective sliding surface 4 or 5 preferably takes the form of a segment of a circle. The position or orientation, as well as the radius, is given by the second length L2, L2 'or L2 "used on the one hand and the value of the maximum thickness D1 on the other hand. Given the maximum thickness D1, as stated above, and during parameterization of the longitudinal extent according to the second length L2, L2 'or L2 "as stated above, there is a first radius R for the middle shape of the contact part 2 with approx. 70 mm, a second radius R' for the bottom shape (most pointed Shape) of the contact part 2 with about 164 mm and a third radius R "for the uppermost shape (buttiest shape) of the contact part 2 with about 48 mm. The designation of the shape with" pointed "," stupf "and" medium "is used here only for mutual linguistic distinction.

In the Figure 6 are the dimensions already mentioned in the enlarged floor plan according to the Figure 3 registered.

The table below summarizes the parameterizations of the contact part 2 mentioned above by way of example for a given maximum thickness D1 of 26 mm. shape Length of the contact part Angle at the edge of the contact Radius of the segment of a circle dull L2 "= 25 mm A "= 44 ° R "= 47.7mm medium L2 = 30 mm A = 38 ° R = 70.2 mm pointed L2 '= 35 mm A '= 27 ° R '= 164.3 mm

Subsequently, the Figures 7 and 8A to 8C the detailed labeling with reference numerals or dimensioning symbols has been omitted for reasons of clarity.

The Figure 7 shows the use of the attachment 1 in combination with a stick 11 (shown in shortened form for reasons of clarity) on which the attachment 1 is attached to the bottom. The stick 11 has a handle 12 and a handle loop 13. A hand 14 of a user (not shown) is shown inserted into the handle loop 13 and grips the handle 12 with her fingers. The attachment 1 dips with its single contact edge 6 into loose material 15 (sand or stones, etc.) of the base 16 , whereby the stick 1 is reliably prevented from slipping when using the stick as well as during the subsequent stick push. Indeed, when the stick 1 is placed on the base 16, the attachment 1 is immersed or interlocked with the loose material 15.

The Figures 8A to 8C show a typical movement during Nordic walking for the stick 11, on which the attachment 1 is attached on the bottom. Here, a first arrow P1 indicates the direction of movement or walking of the user and thus also the direction of movement of the stick 11. Second arrows P2 indicate the direction of the power transmission that occurs during the initial stick operation ( Figure 8A ) and subsequently the stick thrust ( Figure 8B ) in the interaction of the article 1 with the underground 16. After the initial use of the stick, which in the present case is carried out with an angle G of approximately 65 ° between the base 16 and the axis 8 (see Figure 8A ), the stick thrust occurs at which the angle G is reduced to approximately 40 ° (see Figure 8B ). Subsequently (see Figure 8C ) the stick 11 is pulled forward in the direction of movement (according to the first arrow P1 in the plane of the drawing to the left) along the direction of a third arrow P3 (see Figure 8C ). When the stick 11 is pulled in the direction of movement, the first sliding surface 4 now slides easily over the base 16 or the loose material 15, until the stick 11 is again erected with respect to the base 16 to such an extent that that as in FIG Figure 8A can be used and the movement described in this paragraph in the sequences of the Figures 8A-8C can be repeated.

As can be seen from the sequence of movements, the load on the contact part 2 when the stick is pushed predominantly at the contact edge 6 or in a narrower environment along the sliding surfaces 4 and 5, but the sliding surfaces 4 and 5 are largely spared (over a large area) when the stick is pushed. In contrast, the contact edge 6 is largely spared when retightening the stick 11 because it is not exposed to any pressure load in this phase, whereas an abrasive or abrasive load during the Tightening is distributed over a large part or the entire sliding surface that is used. This interplay of stresses also ensures that the shape and thus the sustainable mode of action of contact part 2 is retained in the long term.

Finally, it is pointed out once again that the figures described in detail above are only one exemplary embodiment which can be modified in various ways by a person skilled in the art without departing from the scope of the invention. Furthermore, it is pointed out that the use of the indefinite articles "a" or "an" does not exclude that the relevant features can also be present more than once.

Claims (13)

Stick attachment (1) for a stick (11), in particular a Nordic walking, hiking or tracking stick, which has: a stick receptacle (7) which extends along an axis (8), the stick receptacle (7) being used to receive one end of a stick (11) and to establish a force-transmitting connection to the stick (11), and - a contact zone, which serves to transmit power from the stick attachment (1) to a base (16), characterized in that - The contact zone is designed as a single contact edge (6) and - A first sliding surface (4) and a second sliding surface (5) are formed, the two sliding surfaces (4,5) continuously reducing their distance from each other along the stick attachment (1) towards the contact edge (6) and on the Hit the contact edge (6). Stick attachment (1) according to claim 1, wherein the contact edge (6) intersects the axis (8), preferably at a right angle. Stick attachment (1) according to claim 2, wherein there is a first acute angle (A; A '; A ") measured on the contact edge (6) between the first sliding surface (4) and the axis (8). Stick attachment (1) according to claim 2, wherein a second acute angle (C; C '; C ") exists at the contact edge (6) between the second sliding surface (5) and the axis (8). Stick attachment (1) according to claim 3 and 4, wherein the first acute angle (A; A '; A ") and the second acute angle (C; C'; C") are the same. Stick attachment (1) according to one of the preceding claims, wherein the stick attachment (1) is constructed with mirror symmetry with respect to the two sliding surfaces (4, 5) with respect to the contact edge (6) and along the axis (8). Stick attachment (1) according to one of the preceding claims, wherein the two sliding surfaces (4, 5), starting from the contact edge (6) along the axis (8), have a shape which deviates from the flat shape and is curved outwards. Stick attachment (1) according to claim 7, wherein that part of the stick attachment (1) which is bordered by the two sliding surfaces (4, 5) forms a contact part (2) for coming into contact with the ground (16) and the contact part (2) has a length (L2, L2 ', L2 ") in the range from 25 to 35 mm, preferably 30 mm, and a thickness (D1) measured between the two sliding surfaces (4, 5) at its furthest from the contact edge (6) has a distant point which has a value in the range from 20 to 30 mm, preferably from 26 mm. Stick attachment (1) according to claim 8, wherein the outwardly curved shapes of the sliding surfaces (4, 5) are each defined by a segment of a circle, the position or orientation as well as the radius (R; R '; R ") of which Length (L2; L2 '; L2 ") or thickness (D1) of the contact part (2) is defined. Stick attachment (1) according to one of the preceding claims, wherein the contact edge (6) forms the widest point of the stick attachment (1) and the stick attachment (1) there has a width (B3) in the range from 25 to 30 mm, particularly preferably with 28 mm. Stick attachment (1) according to one of the preceding claims, wherein the stick attachment (1) has a total length in the range of 50-70 mm, preferably 55-65 mm, and particularly preferably that above the two sliding surfaces (4, 5) the remaining area has the shape of a cuboid or a cube or a prism or a truncated cone, the respective shape preferably tapering starting from the area having the two sliding surfaces (4, 5). Stick attachment (1) according to one of the preceding claims, wherein the stick attachment (1) is made of a rubber-like material or of rubber. Stick (11) equipped with a stick attachment (1) according to one of claims 1 - 12.

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