Device for pivoting an ultrasound element assembly of a probe in an ultrasonic diagnosis apparatus
The present invention relates to a device for pivoting an ultrasound element assembly of a probe in an ultrasonic diagnosis apparatus. A pivot shaft is rotatably coupled to a base and supports the ultrasound element assembly. A wire holder is coupled to the pivot shaft. A driving motor is mounted to the base and has a driving shaft. A wire rope assembly includes a housing connected to the driving shaft of the driving motor to be rotated together therewith, an elastic member provided in the housing, and a pair of wire ropes, a first end of each wire rope being connected to the wire holder and a second end of each wire rope being connected to the elastic member.
1. A device for pivoting an ultrasound element assembly of a probe in an ultrasonic diagnosis apparatus, the probe including a base for supporting the ultrasound element assembly, the device comprising:
a pivot shaft rotatably coupled to the base and supporting the ultrasound element assembly;
a wire holder coupled to the pivot shaft;
a driving motor mounted to the base and having a driving shaft; and
a wire rope assembly including a housing connected to the driving shaft of the driving motor so as to be rotated therewith, the wire rope assembly including a torsion coil spring provided in the housing, the torsion coil spring having a first bent portion at a first end and a second bent portion at a second end, the first and second bent portions extending outside the housing, and the wire rope assembly also including first and second wire ropes, wherein a first end of the first and second wire ropes is connected to the wire holder and a second end of the first and second wire ropes is connected to the first and second bent portions, respectively.
2. The device as recited in claim 1 , wherein the first and second wire ropes are arranged to cross with each other.
3. The device as recited in claim 1 , wherein the driving motor is a step motor.
4. The device as recited in claim 1 , wherein the device further comprises:
a speed reduction means provided between the driving motor and the wire rope assembly, the speed reduction means including a driving pulley coupled to the driving shaft of the driving motor,
a driven pulley fixed to the base,
a timing belt wound around the driving pulley and the driven pulley, and
a driven shaft, one end of which is fixed to the driven pulley and the other end of which is fixed to the housing of the wire rope assembly.
5. The device as recited in claim 4 , wherein teeth are formed at the driving pulley, the driven pulley and the timing belt so that they are tooth-engaged with each other.
6. The device as recited in claim 4 , wherein
a motor supporting plate is coupled to the driving motor near the driving shaft of the driving motor for fixing the driving motor to the base, and
the motor supporting plate has means for adjusting a tension of the timing belt by adjusting the distance between the driving pulley and the driven pulley.
7. The device as recited in claim 6 , wherein the means for adjusting the tension of the timing belt includes at least one through-hole, through which a bolt is fastened to fix the motor supporting plate to the base, extending portions extending vertically from the motor fixing plate, bending portions formed horizontally at the tips of the respective extending portions, and bolt-holes formed vertically at the bending portions, whereby as bolts are tightened through the bolt-holes toward the base, a front end of each bolt moves to be in contact with the base and a reactional force against the movement of the bolt is applied to the motor supporting plate, thereby causing the driving pulley to move away from the driven pulley.
8. The device as recited in claim 7 , wherein the through-hole has a slot-shape, which is long in a vertical direction.