Measuring arm with multifunctional end

A three-dimensional measuring device, comprising:

• an arm made up of articulated elements including:
• a fastener base,
• a first segment connected to the base by a first hinge,
• a second segment connected to the first segment by a second hinge,
• an interface body connected to the second segment by a third hinge, and
• position sensors associated with the hinges and electrically connected to an electronic acquisition unit for supplying the electronic acquisition unit with position measurement signals measuring the positions of the segments relative to one another, the interface body carrying a measuring member and a grip member enabling an operator to point the measuring member at a zone of the object that is to be measured,
• wherein the interface body has a front face in which at least one electrical connector is accessible and from which there extends a projecting tubular coupling part for coupling to the measuring member, an annular grippable body being engaged on the tubular coupling part and extending over the front surface and the electrical connector, a retaining element being mounted on the grippable body to co-operate with the tubular coupling part in order to hold the grippable body pressed against the front face of the interface body.