A device is provided for interacting without contact, via at least one command object, with a user appliance, including at least one first and one second part which, in use, form between them a non-zero angle, the device including: at least one first mechanism of detection by capacitive technology, and without contact, of the at least one command object with respect to a first control surface defined with respect to the first part of the user appliance, the first detection mechanism including several measurement electrodes; at least one, of the measurement electrodes being guarded, by a guard mechanism, at a guard potential, different from a ground potential, of the at least one command object, and substantially identical to the potential of the measurement electrode; and at least one second guard mechanism, for guarding the second part of the user appliance at least partially at the guard potential.