DE29822136U1 - Cross-country telescopic pole - Google Patents

Description

F:\lJBDHF\DHFANM\2502077/2

Applicant: Internal Priority

Klaus Lenhart DE 298 16 717.4

Mittlerer Weg 23 from 18.09.1998

73275 Ohmden

General power of attorney: 4.3.5.-No.682/98AV

2502077/2 07.12.1998

fuh / spf

Title: Cross-country telescopic pole Description

The present invention relates to a telescopic cross-country ski pole according to the preamble of claim 1.

Telescopic poles, which are used in particular for trekking and, more recently, for cross-country skiing, are made up of two or more telescopically interlocking tube parts that can be firmly fixed together in infinitely adjustable lengths. The tube parts can be loosened and re-fixed in both the axial and circumferential directions by turning the relevant tube parts relative to each other. Since trekking poles have a

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have a round pole plate, the position of the pole plate relative to the pole handle or its wrist strap is not important, so that the tube parts that are to be twisted against each other can have any circumferential position relative to each other. For this reason, cross-country telescopic poles also have a round pole plate, in contrast to rigid cross-country poles, which have an asymmetrical cross-country plate where the plate surface does not extend over 3 60° degrees around the pole axis but only over an area of around 180° degrees or less. This asymmetrical cross-country plate must have a certain circumferential position in relation to the handle or its wrist strap. This cannot be guaranteed with telescopic poles, because when two interlocking tube parts are twisted to fix them, only the position of the asymmetrical cross-country plate relative to the handle can be taken into account, if at all, then in a very complicated and time-consuming way.

The object of the present invention is therefore to provide a telescopic cross-country ski pole of the type mentioned at the outset, which can be equipped with an asymmetrical cross-country ski plate without there being difficulties in the alignment with the handle during the telescope adjustment.

To achieve this object, the features specified in claim 1 are provided in a telescopic cross-country ski pole of the type mentioned.

In accordance with the invention, the cross-country ski plate can therefore also be asymmetrical in a telescopic cross-country ski pole, since the asymmetric cross-country ski plate can be rotated and fixed relative to the pole axis, so that the asymmetric cross-country ski plate can easily be aligned in the correct position relative to the handle.

According to the features of claim 2, it is sufficient if the rotation is not continuous but in steps. In addition, the features according to claim 3 are advantageously provided, with which it is achieved that an angularly stepped rotation can only take place after an axial movement.

The relative rotatability of the asymmetrical cross-country ski plate can take place either at the lower tube part (claim 4) or preferably between the upper tube part and the adjacent middle or lower tube part (claim 5). In the latter case, it is particularly advantageous if, according to the features of claim 7 and/or 8, this angular adjustability in combination with the fixation of the two tube parts in the

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This leads to design and manufacturing simplifications and savings in such telescopic cross-country ski poles.

Advantageous structural design results from the features of one or more of claims 9 to The simplicity of the structural design and the angularly stepped rotation results from a sleeve element which is immovably arranged in the relevant pipe part and provided with an internal polygon, in which an external polygon of a guide part is held in a rotationally fixed manner in different angular positions and can be moved axially out of the sleeve element for angular rotation.

Further details of the invention can be found in the following description, in which the invention is described and explained in more detail using the embodiment shown in the drawing. In the drawing:

Figure 1 shows a schematic representation of a telescopic cross-country ski pole according to an embodiment of the present invention,

Figure 2 shows an enlarged section

according to circle II of Figure 1 partly in view partly in longitudinal section according to a preferred embodiment of the present invention and

Figure 3 is an enlarged view of a section along the line III-III of Figure 1, but according to a further embodiment of the present invention.

The telescopic cross-country ski pole 10 shown in Figure 1 has a telescopic tube 11, for example made of metal, which is composed of an upper outer tube 12 and a lower inner tube 13 which can be telescopically inserted into the outer tube 12 and fixed at different lengths. The outer tube 12 is firmly connected at its upper end to a handle 14 through which a length-adjustable loop 16 is guided. The inner tube 13 is provided with an asymmetrical cross-country ski plate 17 at its lower end facing away from the outer tube 12. The asymmetrical plate 17 consists essentially of plastic and has a metal tip 18 at its lower end. The position of the asymmetrical plate 17 should always be such that the asymmetrical plate surface is on the same side of the telescopic tube 11 as the loop 16 on the handle 14, which is slightly bent at the end facing away from the loop.

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As shown in Figure 2, the inner tube 13 can be secured in the outer tube 12 both in the axial direction and in the circumferential direction. This is achieved by rotating the inner tube 13 relative to the outer tube 12 in the release direction A for telescopic adjustment, so that axial adjustment is possible. After adjustment, the inner tube 13 is rotated relative to the outer tube 12 in the opposite direction A', so that both axial and circumferential fixing takes place, which prevents unintentional loosening. This is achieved by arranging a plastic expansion element 50 within the upper outer tube 12, which has a bushing 51 provided with an internal thread, on which four expansion elements 52 are formed in an axial extension and evenly distributed in the circumferential direction. By screwing in a threaded part 54 provided with a cone 53, the expansion elements 52 are pushed radially outwards so that they frictionally engage the inner wall of the outer tube 12 to form a rotationally fixed and axially motion-proof connection. Since the threaded part 54 is connected to the inner tube 13 in a manner to be described below, the two tubes 12 and 13 can be fixed against one another in the selected extended position.

With such a telescopic length adjustment, it must then be ensured that the asymmetrical plate 17 still has the above-mentioned position relative to the telescopic tube 11 in the manner shown in Figure 1, i.e. is arranged essentially vertically below the handle loop 16. This is because the asymmetrical plate surface 19 of the plate 17, which only extends over an area of less than 180° around the inner tube 13, must be arranged trailing in the direction of the cross-country skiing movement like the handle loop 16.

In order to always ensure this operating or long-distance running position, the asymmetrical plate 17 can be rotated about the telescopic tube axis 21 and fixed in the respective rotation position. A preferred embodiment of this is shown in Figure 2 and another embodiment is shown in Figure 3.

A sleeve element 22, for example made of plastic, is fixed in place, preferably pressed in and/or glued, in the upper end of the inner tube 13 facing the outer tube 12, so that it is firmly connected to the inner tube 13 in both the axial direction and the circumferential direction. The sleeve element 22 has a polygonal recess 23, which here is formed by a hexagon

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The sleeve element 22 has a collar 25, the annular end of which rests against the annular end 34 of the inner tube 13.

The sleeve element 22 is penetrated by a guide element 26, the outer polygon 27 of which engages in the polygon recess 23 of the sleeve element 22 in an axially movable but non-rotatable manner. The guide element 26 is formed by a one-piece metallic bolt 30 with differently designed areas, while the outer polygon 27 is provided on a collar piece 40 made of, for example, plastic. The part of the collar piece provided with the outer polygon 27 is provided at one end with a collar 41 which, in the assembled position according to Figure 2, rests on the collar 25 of the sleeve element 22. The collar piece 40 surrounds an area 42 of the bolt 30 in such a way that the collar piece 40 is fixed to the bolt area 42 both in the circumferential direction and in the axial direction, i.e. is motion-proof. For this purpose, the bolt 30 has in the area 42 several, here three spaced-apart annular grooves 43 into which the collar piece 40 designed as an injection-molded part engages on the inner circumference.

The bolt 30 is provided at its end arranged inside the inner tube 13 with a shoulder 2 9, for example here in the form of a snap ring or a hexagon nut

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A helical compression spring 31 which concentrically surrounds this bolt end 28 is arranged between the shoulder 29 of the bolt 30 or the guide element 26 and the opposite end of the sleeve element 22. A metal disk 44 is provided between the end of the sleeve element 22 and the relevant end of the compression spring 31. The guide element 26 also has an outer bolt part 32 which projects beyond the collar 40 into the interior of the outer tube 12 and is provided with an external thread and thus forms the threaded part 54 with cone 53 for spreading the spreading element 50.

The rotatability of the asymmetrical plate 10 is achieved as follows: According to Figure 2, the inner tube 13 and outer tube 12 are moved axially relative to each other to adjust the length of the telescopic pole and are then connected to each other in a torsion-proof and non-displaceable manner by a relative rotation according to arrow A'. In this fixed state, as mentioned, the outer polygon 27 of the guide element 26 is non-rotatably received in the polygon recess 23 of the sleeve element 22 and thus in the inner tube 13. The guide element 26 can, however, be moved axially in the direction of arrow B against the effect of the compression spring 30 by pulling the two tubes 12 and 13 apart.

so that the outer polygon 27 is released from the polygon recess. This is possible because the bolt 30 is held axially in the outer tube 12 via the expansion element 50. In this pulled-out position, the inner tube 13 can be adjusted in angular steps according to the double arrow C with the asymmetrical plate 17 held stationary on its underside. In the example case mentioned, the steps are 60°. In this way, the plate surface 19 of the asymmetrical plate 17 can be brought into a position almost vertically under the handle loop 16 after the telescopic tube 11 has been adjusted. After twisting, the guide element 26 moves against the arrow B due to the pre-tensioned compression spring 31, so that after the inner tube 13, for example, is released, the rest position according to the figure is reached again when the collar 41 of the collar piece 40 and the collar of the sleeve element 22 are again in contact with one another. By slightly twisting the two tubes against each other, the alignment of the plate to the handle can be corrected, whereby this adjustment is ideally carried out in the direction of rotation in which the locking mechanism is tightened.

In the further embodiment shown in Figure 3, the asymmetrical plate 17 is arranged in angled steps relative to the inner tube 13 to

Alignment relative to the handle 14 can be rotated. For this purpose, a sleeve element 122, for example made of plastic, is fixed in place, preferably pressed into the lower end of the inner tube 13, so that it is firmly connected to the inner tube 13 in both the axial direction and the circumferential direction. The sleeve element 122 has a lower polygonal recess 123, i.e. facing the end of the inner tube 13, and an inner bore 124 coaxial with this. The polygonal recess 123, which is formed here by a hexagon, is slightly longer than the inner bore 124, the diameter of which is smaller than the wrench size of the polygonal recess 123.

The sleeve element 122 is penetrated by a guide element 126, the outer polygon 127 of which engages in the polygon recess 123 of the sleeve element 122 in an axially movable but non-rotatable manner and the inner bolt 128 of which penetrates the inner bore 124, projects inwards beyond the sleeve element 122 and is provided with a shoulder 129 at a distance. Between the shoulder 12 9 of the guide element 126 and the opposite end of the sleeve element 122, a helical compression spring 111 is arranged concentrically surrounding the bolt 128. The guide element 126 also has an outer bolt 132 protruding from the outer polygon 127, between which and the outer polygon 127 a stop plate

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133 is arranged which, in the rest state of the guide element 12 6 shown in Figure 3, rests against the annular face 134 of the lower end of the inner tube 113 due to the effect of the compression spring 131. The axial plate 17 is mounted, preferably pressed, onto the outer bolt 132 in a displacement-proof and rotation-proof manner. The metallic tip 18 can be firmly connected to the shaft 13 6 of the asymmetrical plate 17, but it can also be a component of the outer bolt 132. The guide element 126 can, for example, be in one piece. In the embodiment shown, the guide element 126 has a threaded screw, the head of which forms the shoulder 12 9, the outer polygon 12 7 being formed by a nut screwed onto the threaded screw. The outer bolt 13 2 can be smooth or threaded so that the stop plate 133 and/or shaft 13 6 can also be screwed on.

The rotatability of the asymmetrical plate 17 is achieved here as follows: In the resting state shown in Figure 3, as mentioned, the outer polygon 127 of the guide element 126 is non-rotatably received in the polygon recess 123 of the sleeve element 122 and thus in the inner tube 13. The guide element 126 can, however, be moved axially in the direction of arrow B against the effect of the compression spring 130, so that the

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Outer polygon 127 is released from the polygon recess 123. In this pulled-out position, the asymmetrical plate 17 can be adjusted in angular steps according to the double arrow C. In the example case mentioned, these are steps of 60°. In this way, the plate surface 119 of the asymmetrical plate 17 can be brought into a position vertically under the handle loop 16 after adjusting the telescopic tube 11. After twisting, the guide element 12 6 moves against the arrow B due to the pre-tensioned compression spring 131, so that after the asymmetrical plate 17 is released, the rest position according to Figure 3 is reached again when the stop plate 133 has rested on the annular face 134 of the inner tube 13.

Claims (15)

1. Cross-country telescopic pole ( 10 ), with a handle ( 14 ) preferably provided with a loop ( 16 ), with a telescopic tube ( 11 ) and with a cross-country plate ( 17 ) held on the lower tube part ( 13 ) of the telescopic tube ( 11 ), characterized in that the cross-country plate ( 17 ) is designed asymmetrically and is held so as to be rotatable relative to the telescopic tube axis ( 21 ). 2. Cross-country telescopic pole according to claim 1, characterized in that the asymmetrical plate ( 17 ) can be rotated about the telescopic tube axis ( 21 ) in angular steps over a complete revolution. 3. Cross-country telescopic pole according to claim 1 or 2, characterized in that the asymmetrical plate ( 17 ) is movable in the direction of the telescopic tube axis ( 21 ) to achieve the rotatability. 4. Cross-country telescopic pole according to one or more of claims 1 to 3, characterized in that the asymmetrical cross-country plate ( 17 ) is held rotatably on the lower tube part ( 13 ) relative to the telescopic tube axis ( 21 ). 5. Cross-country telescopic pole according to one or more of claims 1 to 3, characterized in that the asymmetrical cross-country plate ( 17 ) is rigidly attached to the lower tube part ( 13 ) and the lower tube part ( 13 ) is held rotatably relative to the telescopic tube axis ( 21 ) on the adjacent middle or upper tube part ( 12 ). 6. Cross-country telescopic pole according to claim 4, characterized in that the asymmetrical cross-country plate ( 17 ) is firmly connected to a guide element ( 26 ) which is held axially movable in a sleeve element ( 22 ) held immovably in the end of the lower tube part ( 30 ) and can be brought into a rotationally fixed position therein. 7. Cross-country telescopic pole according to claim 5, characterized in that one of the tube parts ( 12 , 13 ) can be connected in a rotationally and displacement-proof manner to a guide element ( 26 ) which is held axially movable in a sleeve element ( 22 ) held immovably in the end of the other of the tube parts ( 12 , 13 ) and can be brought into a rotationally fixed position therein. 8. Cross-country telescopic pole according to claim 7, characterized in that the guide element ( 26 ) can be detachably connected to one of the tube parts ( 12 , 13 ) via a radial expansion part ( 50 ). 9. Cross-country telescopic pole according to claim 7 or 8, characterized in that the sleeve element is held stationary in the lower tube part ( 13 ) and the guide element ( 26 ) can be connected to the upper tube part ( 12 ). 10. Cross-country telescopic pole according to claim 6 or 7, characterized in that the sleeve element ( 22 ) has an inner polygon ( 23 ) and the guide element ( 26 ) has a matching axially retractable and extendable outer polygon ( 27 ). 11. Cross-country telescopic pole according to claim 5, characterized in that the outer polygon ( 27 ) is held in a spring-loaded position retracted into the inner polygon ( 23 ). 12. Cross-country telescopic pole according to claim 10 or 11, characterized in that the outer polygon ( 27 ) is formed on a collar piece ( 40 ) which surrounds a region of the bolt-like guide element ( 26 ) in a movement-resistant manner. 13. Cross-country telescopic pole according to one of claims 7 to 12, characterized in that a spiral spring ( 31 ) is arranged between the sleeve element ( 22 ) and a shoulder ( 29 ) of the bolt-like guide element ( 26 ). 14. Cross-country telescopic pole according to claim 12 or 13, characterized in that the collar of the collar piece ( 40 ) rests on the sleeve element ( 22 ), the annular shoulder of which engages over the annular end ( 34 ) of the lower tube ( 13 ). 15. Cross-country telescopic pole according to one of claims 7 to 14, characterized in that the end of the bolt-like guide element ( 26 ) facing away from the spiral spring ( 31 ) is formed by a threaded screw which can be screwed into the radial expansion part ( 50 ) to expand it.