Patent ID: 7602090

Claim:
A gear drive unit ( 10 ) comprising an electric drive motor ( 12 ), which has an armature shaft ( 16 ), and at least one housing part ( 14 , 18 ), which accommodates the armature shaft ( 16 ), and an electronic interface ( 36 ) for accommodating different plug-in modules ( 34 , 82 , 94 , 110 ) which can be inserted into the electronic interface ( 36 ) in the insertion direction ( 55 ), and the electronic interface ( 36 ) having walls ( 38 ) which are spaced apart from one another, with at least one first surface ( 50 ) and guides ( 64 ) being arranged on the walls ( 38 ) along the insertion direction ( 55 ) in order to seal off different plug-in modules ( 34 , 82 , 94 , 110 ) from the at least one housing part ( 14 , 18 ), characterized in that the walls ( 38 ) are approximately rectangular and form an opening ( 42 ) perpendicular to and an opening ( 44 ) axial to the armature shaft ( 16 ), and the openings 42 and 44 are connected to one another and form a common opening with radial and axial opening directions, the opening being substantially uninterrupted between the radial and axial opening directions, with the first surface ( 50 ) being formed by the inner surfaces ( 56 ) of the walls ( 38 ) in order to seal off the plug-in modules ( 34 , 82 , 94 , 110 ) at least partially radially in relation to the insertion direction ( 55 ).