Patent ID: 7334478

Claim:
A device for guiding the movement of a transducer of an ultrasonic probe, the probe including the transducer for converting an ultrasonic signal into an electric signal and a motor for generating driving power for moving the transducer, the device comprising: a pair of guide rails disposed adjacent to both side-ends of the transducer, the guide rails being apart from the both side-ends of the transducer by predetermined gaps; slots formed lengthwise at side surfaces of the guide rails disposed opposite to the both side-ends of the transducer, each slot having a bottom wall and a side wall; bearings coupled to the both side-ends of the transducer, the bearings being received in the slots and rolling on the bottom walls of the slots; and means for maintaining the gaps constant between the both side-ends of the transducer and the guide rails, wherein the means includes first magnets fixed to the both side-ends of the transducer and second magnets fixed to the side walls of the slots along the overall length of the slots, and wherein the first magnets are received in the slots and are disposed opposite to the second magnets so that repulsive forces are generated therebetween.