Patent ID: 8292330

Claim:
Insertable tube system for a vacuum cleaner, comprising: at least one first tube, a second tube and a coupling for detachable connection of the first tube to the second tube, the coupling having a guide element and a lever button, the guide element being located on an outer side of a wall of the first tube, the lever button being supported in the guide element to be able to move around a pivot axis, the lever button being movable by the force of at least a first spring element into a catch position, and the bottom of the lever button having a catch projection, and the wall of the first tube being penetrated by an opening for the catch projection of the lever button, and a mechanical connection between the first tube and the second tube being producible by engagement of the catch projection with a catch recess of the second tube, wherein an electrically conductive connection between the first tube and the second tube is produced with the first spring element in at least a catch position of the lever button; and wherein the catch projection of the lever button and the first spring element penetrate the wall of the first tube in the catch position via respective separate openings.