1. Telescopic device comprising a first tubular member and the extension member, said extension member having a first diameter and being disposed movably in the axial direction within the first tubular member, wherein a connecting member formed on the movable member and the extension to be fitted at least: the first axial position, wherein the extension member is movable within the first tubular member, a second an axial position in which the connecting element engages between the extension member and the interior of the first tubular member, restricting movement of at least one longitudinal direction and a third axial position, wherein the connecting member is fixed relative to the extension member via receiving section extension member having a second diameter smaller than said first diametra.2. Telescopic device according to Claim. 1, characterized in that said receiving portion the extension member is formed as a kanavki.3. Telescoping device according to claim. 2, characterized in that the size of said groove is set for receiving the connecting elementa.4. Telescoping device according to claim. 2, characterized in that said groove is approximately the same width as the connecting member as viewed in the longitudinal napravlenii.5. Telescopic device according to Claim. 1, characterized in that the transition portion between said first and second diameters of the extension member is formed as a straight line perpendicular PRODO1. Телескопическое устройство, содержащее первый трубчатый элемент и удлинительный элемент, при этом указанный удлинительный элемент имеет первый диаметр и является расположенным с возможностью перемещения в осевом направлении внутри первого трубчатого элемента, при этом предусмотрен соединительный элемент, выполненный подвижным на удлинительном элементе и с возможностью установки по меньшей мере в:первое осевое положение, в котором удлинительный элемент выполнен с возможностью перемещения внутри первого трубчатого элемента,второе осевое по
