Coupling arrangement for a telescopic device

A telescopic device comprising:

• a first tubular element;
• an extension member disposed axially within the first tubular element, the extension member having a first annular rim located at a distal end of the extension member and a second annular rim located between the first annular rim and a proximal end of the extension member, with the extension member provided with a rim diameter measured at an outer periphery of the second annular rim, and with the extension member having a first section extending from the first annular rim to a receiving section, and the receiving section extending from the first section to the second annular rim;
• and
• a coupling member movable relative to the extension member and coupled to the extension member between the first annular rim and the second annular rim, the coupling member is positionable in at least:
• a first axial position wherein coupling member is located on the first section of the extension member closer to the first annular rim than to the second annular rim such that the extension member is displaceable within the first tubular element,
• a second axial position wherein the coupling member is located on the first section of the extension member closer to the second annular rim than to the first annular rim such that the coupling member engages between the extension member and an interior of the first tubular element limiting displacement of the extension member in at least one longitudinal direction, and
• a third axial position wherein the coupling member is affixed within the receiving section of the extension member, wherein the receiving section has an outside second diameter that is less than the rim diameter.