A telescopic device comprising a first tubular element and an extension member displaceably arranged in an axial direction within the first tubular element, between at least, a first axial position wherein the extension member is displaceable within the first tubular element, where the first tubular element comprises a first coupling means and the extension member comprises a second coupling means, and in a second axial position where the first and second coupling means cooperate with each other for limiting the displacement of said extension member in at least one longitudinal direction, where the first and/or the second coupling means are provided with at least one protrusion in a radial direction of a longitudinal axis of the first tubular element and/or the extension member.第1管状要素と延伸部材とを備える伸縮装置であって、延伸部材は第1管状要素内の少なくとも、第1管状要素が第1連結手段を備え、延伸部材が第2連結手段を備える、延伸部材が第1管状要素内で移動可能である第1軸方向位置と、少なくとも1つの長手方向における延伸部材の移動を制限するために、第1及び第2連結手段が互いに協働する第2軸方向位置との間に軸方向に移動可能に配置されており、第1管状要素及び/又は延伸部材の長手方向軸線の半径方向の少なくとも1つの突出部が、第1及び/又は第2連結手段に設けられる、伸縮装置。
