Patent ID: 7429130

Claim:
A unit for acquiring dental radiographic images of a patient, comprising an X-ray head ( 2 ); supporting means ( 3 ) supporting the X-ray head ( 2 ); and connecting means ( 8 ) connecting the X-ray head ( 2 ) to said supporting means ( 3 ); the connecting means ( 8 ) comprising at least one cylindrical joint ( 10 , 11 ), in turn comprising a hub ( 15 ) and a pin ( 14 ) fitted inside the hub ( 15 ); and the unit being characterized in that the hub ( 15 ) comprises two tightening members ( 23 , 24 ), which extend about said pin ( 14 ) and are movable with respect to each other to and from a lock position locking the pin ( 14 ); actuating means ( 29 , 30 ) being provided to move the tightening members ( 23 , 24 ) between said lock position and a release position.