Tip attachment

Abstract

Tip attachment for a pole, in particular for a trekking pole, cross-country-skiing pole, Nordic-walking pole or downhill-skiing pole, having a plastic sleeve, which can be fastened at the lower, free end of a pole tube and, at an upper end, has an upwardly open hole for accommodating the lower, free end of the pole tube, and a tip insert is fastened in an opening at the lower end of the pole tube. The tip insert has a carrier element, which is releasably fastened in the opening by a drive-in thread provided on a retaining region in a substantially cylindrical region.

1 . A tip attachment for a pole, having a plastics material sleeve which can be secured to the lower free end of a pole tube and which has at an upper end an upwardly open hole for receiving the lower free end of the pole tube, and at the lower end of which a tip insert is secured in an opening,
 wherein the tip insert has a carrier element which is releasably secured to a drive-in thread which is provided in a retention region in a substantially cylindrical region in the opening.   
     
     
         2 . The tip attachment as claimed in  claim 1 , wherein the retention region has at least one thread turn which extends around at least once and the flat flank of which facing the upper end of the plastics material sleeve encloses with an axis of the tip attachment a smaller angle than the steep flank thereof facing away from the upper end of the plastics material sleeve. 
     
     
         3 . The tip attachment as claimed in  claim 2 , wherein the angle between the flat flank and the axis is in the range from 5 to 60°, and the angle between the steep flank and the axis is in the range from 60 to 90°, and/or in that the difference in the angles between the flat flank and the axis or the steep flank and the axis is in the range from 20 to 60°. 
     
     
         4 . The tip attachment as claimed in  claim 1 , wherein the tip attachment has at the end thereof facing away from the plastics material sleeve a receiving opening for receiving a hard tip and such a tip. 
     
     
         5 . The tip attachment as claimed in  claim 1 , wherein the carrier element has at the end thereof facing away from the plastics material sleeve a tip expansion which, with a step being formed in the direction toward the plastics material sleeve, is constructed in a tapering manner so that a substantially radially extending stop face is formed between the retention region and the tip expansion. 
     
     
         6 . The tip attachment as claimed in  claim 1 , wherein the retention region is at the free end thereof in the form of a tip without any thread. 
     
     
         7 . The tip attachment as claimed in  claim 6 , wherein this tip ( 18 ) has a conically converging tip region ( 32 ) and a substantially cylindrical region ( 31 ) which follows it in the direction toward the drive-in thread ( 19 ) and wherein the substantially cylindrical region has a smaller outer diameter than the highest protrusion of the thread turn of the drive-in thread, and wherein the outer diameter of the substantially cylindrical region of the tip substantially corresponds to the inner diameter of the cylindrical region in the opening of the plastics material sleeve. 
     
     
         8 . The tip attachment as claimed in  claim 1 , wherein the highest protrusion of the thread turn of the drive-in thread typically has an outer diameter which is greater than the inner diameter of the cylindrical region in the opening of the plastics material sleeve. 
     
     
         9 . The tip attachment as claimed in  claim 1 , wherein the plastics material sleeve has around the opening a radially extending stop face, the outer diameter of which substantially corresponds to the outer diameter of a radial stop face of the carrier element. 
     
     
         10 . The tip attachment as claimed in  claim 1 , wherein the plastics material sleeve comprises a thermoplastic plastics material, and/or in that the carrier element of the tip attachment comprises plastics material or metal. 
     
     
         11 . A method for assembling a tip attachment as claimed in  claim 1 , wherein the plastics material sleeve is presented and subsequently the carrier element of the tip attachment, is hammered or pressed in an axial direction into the plastics material sleeve without using a bonding agent. 
     
     
         12 . The method as claimed in  claim 11 , wherein the tip attachment is secured to a pole tube subsequently or beforehand. 
     
     
         13 . A method for changing a tip in a tip attachment as claimed in  claim 1 , wherein the tip insert is unscrewed from the plastics material sleeve and a replacement tip is hammered or pressed into the plastics material sleeve. 
     
     
         14 . A trekking pole, cross-country skiing pole, Nordic walking pole or alpine ski pole, having an attachment according to  claim 1 . 
     
     
         15 . A tip attachment as claimed in  claim 1 , wherein it is for a trekking pole, cross-country skiing pole, Nordic walking pole or alpine skiing pole 
     
     
         16 . The tip attachment as claimed in  claim 2 , wherein the angle between the flat flank and the axis is in the range from 10 to 40°, or in the range from 15 to 30° and the angle between the steep flank and the axis is in the range from 70 to 85°, or in the range from 75 to 85° and/or in that the difference in the angles between the flat flank and the axis or the steep flank and the axis is in the range from 30 to 50°. 
     
     
         17 . The tip attachment as claimed in  claim 1 , wherein the tip attachment has at the end thereof facing away from the plastics material sleeve a receiving opening for receiving a hard tip and such a tip, wherein the tip is a tip made of a metal, including hard metal, or ceramic material which is secured in the receiving opening in the form of a blind hole, pressed in and/or adhesively bonded. 
     
     
         18 . The tip attachment as claimed in  claim 1 , wherein the carrier element has at the end thereof facing away from the plastics material sleeve a tip expansion which, with a step being formed in the direction toward the plastics material sleeve, is constructed in a tapering manner so that a substantially radially extending stop face is formed between the retention region and the tip expansion, wherein the tip expansion is formed at the side facing away from the retention region as a conically convergent surface region and/or in that the carrier element has, in the region thereof which is exposed in the assembled state of the plastics material sleeve, means for engaging an assembly tool in the form of axially extending parallel engagement faces. 
     
     
         19 . The tip attachment as claimed in  claim 1 , wherein the retention region is at the free end thereof in the form of a tip without any thread, wherein this tip has a conically converging tip region and a substantially cylindrical region which follows it in the direction toward the drive-in thread. 
     
     
         20 . The tip attachment as claimed in  claim 1 , wherein the highest protrusion of the thread turn of the drive-in thread has an outer diameter which is greater than the inner diameter of the cylindrical region in the opening of the plastics material sleeve, wherein the outer diameter of the thread turn is at least 0.1 mm, or at least 0.5 mm, or in the range from 0.1 to 2 mm or 0.1 to 1 mm greater than the inner diameter of the cylindrical region. 
     
     
         21 . The tip attachment as claimed in  claim 1 , wherein the plastics material sleeve comprises a thermoplastic plastics material, in injected form, wherein it is a plastics material selected from the following group: polyethylene, polypropylene, polyamide, polyurethane, polycarbonate, where applicable with fillers and/or fiber reinforcement, and/or in that the carrier element of the tip attachment comprises steel, including stainless steel or surface-coated steel, or zinc-plated steel. 
     
     
         22 . A method for assembling a tip attachment as claimed in  claim 11 , wherein the plastics material sleeve is presented and subsequently the carrier element of the tip attachment, with the tip already secured thereto, is hammered or pressed in an axial direction into the plastics material sleeve without using a bonding agent.